Merge branch 'master' into main

2021-10-03 13:26:11 +02:00
parent 95c190defd 4137427989
commit b2c112f711
88 changed files with 5355 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,5 @@
+.gradle
+build
+.idea
+local.properties
+gradle.properties
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -0,0 +1,138 @@
+plugins {
+    kotlin("multiplatform") version "1.5.31"
+    `maven-publish`
+    signing
+}
+
+group = "nl.astraeus"
+version = "1.0.0"
+
+repositories {
+    mavenLocal()
+    mavenCentral()
+    maven { setUrl("https://dl.bintray.com/kotlin/kotlin-eap") }
+}
+
+kotlin {
+    jvm()
+    js(BOTH) {
+        browser {
+            testTask {
+                useKarma {
+                    useFirefox()
+                    //useChrome()
+                }
+            }
+        }
+    }
+
+    sourceSets {
+        val commonMain by getting {}
+        val commonTest by getting {
+            dependencies {
+                implementation(kotlin("test-common"))
+                implementation(kotlin("test-annotations-common"))
+            }
+        }
+        val jvmTest by getting {
+            dependencies {
+                implementation(kotlin("test-junit"))
+            }
+        }
+        val jsTest by getting {
+            dependencies {
+                implementation(kotlin("test-js"))
+            }
+        }
+    }
+}
+
+extra["PUBLISH_GROUP_ID"] = "nl.astraeus"
+extra["PUBLISH_VERSION"] = "1.0.0"
+extra["PUBLISH_ARTIFACT_ID"] = "kotlin-css-generator"
+
+// Stub secrets to let the project sync and build without the publication values set up
+val signingKeyId: String by project
+val signingPassword: String by project
+val signingSecretKeyRingFile: String by project
+val ossrhUsername: String by project
+val ossrhPassword: String by project
+
+extra["signing.keyId"] = signingKeyId
+extra["signing.password"] = signingPassword
+extra["signing.secretKeyRingFile"] = signingSecretKeyRingFile
+extra["ossrhUsername"] = ossrhUsername
+extra["ossrhPassword"] = ossrhPassword
+
+publishing {
+    repositories {
+        maven {
+            name = "releases"
+            // change to point to your repo, e.g. http://my.org/repo
+            url = uri("http://nexus.astraeus.nl/nexus/content/repositories/releases")
+            credentials {
+                val nexusUsername: String by project
+                val nexusPassword: String by project
+
+                username = nexusUsername
+                password = nexusPassword
+            }
+        }
+        maven {
+            name = "snapshots"
+            // change to point to your repo, e.g. http://my.org/repo
+            url = uri("http://nexus.astraeus.nl/nexus/content/repositories/snapshots")
+            credentials {
+                val nexusUsername: String by project
+                val nexusPassword: String by project
+
+                username = nexusUsername
+                password = nexusPassword
+            }
+        }
+         maven {
+            name = "sonatype"
+            setUrl("https://s01.oss.sonatype.org/service/local/staging/deploy/maven2/")
+            credentials {
+                username = ossrhUsername
+                password = ossrhPassword
+            }
+        }
+    }
+
+    // Configure all publications
+    publications.withType<MavenPublication> {
+
+        // Stub javadoc.jar artifact
+        //artifact(javadocJar.get())
+
+        // Provide artifacts information requited by Maven Central
+        pom {
+            name.set("kotlin-css-generator")
+            description.set("Kotlin css generator")
+            url.set("https://github.com/rnentjes/kotlin-css-generator")
+
+            licenses {
+                license {
+                    name.set("MIT")
+                    url.set("https://opensource.org/licenses/MIT")
+                }
+            }
+            developers {
+                developer {
+                    id.set("rnentjes")
+                    name.set("Rien Nentjes")
+                    email.set("info@nentjes.com")
+                }
+            }
+            scm {
+                url.set("https://github.com/rnentjes/kotlin-css-generator")
+            }
+        }
+    }
+
+}
+
+signing {
+    sign(publishing.publications)
+}
--- a/gradle.properties.example
+++ b/gradle.properties.example
@@ -0,0 +1,11 @@
+kotlin.code.style=official
+kotlin.js.compiler=both
+
+nexusUsername=deployment
+nexusPassword=
+
+signingKeyId=
+signingPassword=
+signingSecretKeyRingFile=
+ossrhUsername=
+ossrhPassword=
--- a/gradle/wrapper/gradle-wrapper.jar
+++ b/gradle/wrapper/gradle-wrapper.jar
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
--- a/183
+++ b/183
@@ -0,0 +1,183 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -0,0 +1,100 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
--- a/publish/build.gradle.kts
+++ b/publish/build.gradle.kts
@@ -0,0 +1,98 @@
+import java.util.*
+
+plugins {
+  `maven-publish`
+  signing
+}
+
+repositories {
+  mavenCentral()
+}
+
+project.extra.set("PUBLISH_GROUP_ID", "nl.astraeus")
+project.extra.set("PUBLISH_VERSION", "1.0.0")
+project.extra.set("PUBLISH_ARTIFACT_ID", "kotlin-css-generator")
+
+apply(from = "${rootProject.projectDir}/build.gradle.kts")
+
+// Stub secrets to let the project sync and build without the publication values set up
+extra["signing.keyId"] = null
+extra["signing.password"] = null
+extra["signing.secretKeyRingFile"] = null
+extra["ossrhUsername"] = null
+extra["ossrhPassword"] = null
+
+// Grabbing secrets from local.properties file or from environment variables, which could be used on CI
+val secretPropsFile = project.rootProject.file("local.properties")
+if (secretPropsFile.exists()) {
+  secretPropsFile.reader().use {
+    Properties().apply {
+      load(it)
+    }
+  }.onEach { (name, value) ->
+    extra[name.toString()] = value
+  }
+} else {
+  extra["signing.keyId"] = System.getenv("SIGNING_KEY_ID")
+  extra["signing.password"] = System.getenv("SIGNING_PASSWORD")
+  extra["signing.secretKeyRingFile"] = System.getenv("SIGNING_SECRET_KEY_RING_FILE")
+  extra["ossrhUsername"] = System.getenv("OSSRH_USERNAME")
+  extra["ossrhPassword"] = System.getenv("OSSRH_PASSWORD")
+}
+
+val javadocJar by tasks.registering(Jar::class) {
+  archiveClassifier.set("javadoc")
+}
+
+fun getExtraString(name: String) = extra[name]?.toString()
+
+publishing {
+  // Configure maven central repository
+  repositories {
+    maven {
+      name = "sonatype"
+      setUrl("https://s01.oss.sonatype.org/service/local/staging/deploy/maven2/")
+      credentials {
+        username = getExtraString("ossrhUsername")
+        password = getExtraString("ossrhPassword")
+      }
+    }
+  }
+
+  // Configure all publications
+  publications.withType<MavenPublication> {
+
+    // Stub javadoc.jar artifact
+    artifact(javadocJar.get())
+
+    // Provide artifacts information requited by Maven Central
+    pom {
+      name.set("kotlin-css-generator")
+      description.set("Kotlin css generator")
+      url.set("https://github.com/rnentjes/kotlin-css-generator")
+
+      licenses {
+        license {
+          name.set("MIT")
+          url.set("https://opensource.org/licenses/MIT")
+        }
+      }
+      developers {
+        developer {
+          id.set("rnentjes")
+          name.set("Rien Nentjes")
+          email.set("info@nentjes.com")
+        }
+      }
+      scm {
+        url.set("https://github.com/rnentjes/kotlin-css-generator")
+      }
+    }
+  }
+}
+
+// Signing artifacts. Signing.* extra properties values will be used
+
+signing {
+  sign(publishing.publications)
+}
--- a/publish/publish-mavencentral.gradle
+++ b/publish/publish-mavencentral.gradle
@@ -0,0 +1,121 @@
+
+apply plugin: 'maven-publish'
+apply plugin: 'signing'
+
+task publishSourcesJar(type: Jar) {
+    archiveClassifier.set('sources')
+
+    // For pure Kotlin libraries, in case you have them
+    from sourceSets.main.java.srcDirs
+    //from sourceSets.main.kotlin.srcDirs
+}
+
+task packageJavadoc(type: Jar) {
+    from javadoc
+    classifier = 'javadoc'
+}
+
+artifacts {
+    archives publishSourcesJar
+}
+
+File secretPropsFile = project.rootProject.file('local.properties')
+
+ext["signing.keyId"] = ''
+ext["signing.password"] = ''
+ext["signing.secretKeyRingFile"] = ''
+ext["ossrhUsername"] = ''
+ext["ossrhPassword"] = ''
+ext["sonatypeStagingProfileId"] = ''
+
+if (secretPropsFile.exists()) {
+    Properties p = new Properties()
+
+    new FileInputStream(secretPropsFile).withCloseable { is ->
+        p.load(is)
+    }
+
+    p.each { name, value ->
+        ext[name] = value
+    }
+}
+
+afterEvaluate {
+    publishing {
+        publications {
+            release(MavenPublication) {
+                // The coordinates of the library, being set from variables that
+                // we'll set up later
+                groupId PUBLISH_GROUP_ID
+                artifactId PUBLISH_ARTIFACT_ID
+                version PUBLISH_VERSION
+
+                // Two artifacts, the `aar` (or `jar`) and the sources
+                if (project.plugins.findPlugin("com.android.library")) {
+                    artifact("$buildDir/outputs/aar/${project.getName()}-release.aar")
+                } else {
+                    artifact("$buildDir/libs/${project.getName()}-${version}.jar")
+                }
+                artifact publishSourcesJar
+                artifact packageJavadoc
+
+                // Mostly self-explanatory metadata
+                pom {
+                    name = PUBLISH_ARTIFACT_ID
+                    description = 'Simple JDBC wrapper for query statistics'
+                    url = 'https://github.com/rnentjes/Simple-jdbc-statistics'
+                    licenses {
+                        license {
+                            name = 'MIT License'
+                            url = 'https://github.com/rnentjes/Simple-jdbc-statistics/blob/master/LICENCE.txt'
+                        }
+                    }
+                    developers {
+                        developer {
+                            id = 'rnentjes'
+                            name = 'Rien Nentjes'
+                            email = 'info@nentjes.com'
+                        }
+                        // Add all other devs here...
+                    }
+                    // Version control info - if you're using GitHub, follow the format as seen here
+                    scm {
+                        connection = 'scm:git:github.com/rnentjes/Simple-jdbc-statistics.git'
+                        developerConnection = 'scm:git:ssh://github.com/rnentjes/Simple-jdbc-statistics.git'
+                        url = 'https://github.com/rnentjes/Simple-jdbc-statistics.git/tree/main'
+                    }
+                    // A slightly hacky fix so that your POM will include any transitive dependencies
+                    // that your library builds upon
+                    /*
+                    witXml {
+                        def dependenciesNode = asNode().appendNode('dependencies')
+
+                        project.configurations.implementation.allDependencies.each {
+                            def dependencyNode = dependenciesNode.appendNode('dependency')
+                            dependencyNode.appendNode('groupId', it.group)
+                            dependencyNode.appendNode('artifactId', it.name)
+                            dependencyNode.appendNode('version', it.version)
+                        }
+                    }*/
+                }
+            }
+        }
+        // The repository to publish to, Sonatype/MavenCentral
+        repositories {
+            maven {
+                // This is an arbitrary name, you may also use "mavencentral" or
+                // any other name that's descriptive for you
+                name = "sonatype"
+                url = "https://s01.oss.sonatype.org/service/local/staging/deploy/maven2/"
+                credentials {
+                    username ossrhUsername
+                    password ossrhPassword
+                }
+            }
+        }
+    }
+}
+
+signing {
+    sign publishing.publications
+}
--- a/publish/settings.gradle.kts
+++ b/publish/settings.gradle.kts
@@ -0,0 +1,12 @@
+pluginManagement {
+    repositories {
+        mavenCentral()
+
+        maven { setUrl("https://plugins.gradle.org/m2/") }
+    }
+}
+
+rootProject.name = "publish-kotlin-css-generator"
+
+//enableFeaturePreview("GRADLE_METADATA")
+//include(":publish")
--- a/readme.md
+++ b/readme.md
@@ -0,0 +1,160 @@
+# Css generator like less/sass in kotlin multiplatform
+
+This library is for generating css from a kotlin dsl.
+It can be used as an alternative to less/sass or as a runtime library to generate css on-the-fly. 
+
+Tools like less and sass are often used as a build step and take some time.
+This library is meant to be fast enough to generate the css on the fly either from the server or directly in the browser.
+
+Examples:
+
+## Nesting / colors / variables
+
+```kotlin
+    val color = hsla(0, 50, 50, 1.0)
+    val backgroundColor = Color.white
+
+    val css = style {
+      select(cls("button")) {
+        padding(5.px)
+        
+        select("a") {
+          color(color)
+          backgroundColor(backgroundColor)
+
+          hover {
+            color(color.lighten(10))
+            backgroundColor(backgroundColor.darken(10))
+          }
+        }
+      }
+    }
+```
+
+To generate the css call get generateCss function:
+
+```kotlin
+    val cssString: String = css.generateCss()
+```
+
+Result:
+
+```css
+.button {
+    padding:                      5px;
+}
+
+.button a {
+    color:                        hsla(0, 50%, 50%, 1.0);
+    background-color:             white;
+}
+
+.button a:hover {
+    color:                        hsla(0, 50%, 55%, 1.0);
+    background-color:             rgba(229, 229, 229, 1.0);
+}
+```
+
+There are several options when generating the css, for example minified:
+
+
+```kotlin
+    val cssString: String = css.generateCss(minified = true)
+```
+
+Result:
+
+```css
+.button{padding:5px;}.buttona{color:hsla(0,50%,50%,1.0);background-color:white;}.buttona:hover{color:hsla(0,50%,55%,1.0);background-color:rgba(229,229,229,1.0);}
+```
+
+## Mixins
+
+As it's all just kotlin code, includes and mixins etc. are just functions calls.
+
+```kotlin
+   fun Style.borderStyles(borderWidth: Measurement = 2.px) {
+      borderWidth(borderWidth)
+      borderColor(Color.aquamarine)
+      borderStyle(BorderStyle.solid)
+    }
+
+    val css = style {
+      select(txt("a"), cls("button")) {
+        borderStyles()
+
+        color(Color.white)
+      }
+
+      select(cls("btn-primary")) {
+        borderStyles(3.px)
+        color(Color.blue)
+      }
+    }
+```
+
+Result:
+
+```css
+a {
+    border-width:                 2px;
+    border-color:                 aquamarine;
+    border-style:                 solid;
+    color:                        white;
+}
+
+.button {
+    border-width:                 2px;
+    border-color:                 aquamarine;
+    border-style:                 solid;
+    color:                        white;
+}
+
+.btn-primary {
+    border-width:                 3px;
+    border-color:                 aquamarine;
+    border-style:                 solid;
+    color:                        blue;
+}
+```
+
+Giving the option combineEqualBlocks to the generateCss call will combine the a and .button blocks with the following result:
+
+```css
+a,
+.button {
+  border-width:                 2px;
+  border-color:                 aquamarine;
+  border-style:                 solid;
+  color:                        white;
+}
+
+.btn-primary {
+  border-width:                 3px;
+  border-color:                 aquamarine;
+  border-style:                 solid;
+  color:                        blue;
+}
+```
+
+## Measurements
+
+Sizes and widths are given in measurements, there are extension variables to help with these:
+
+```kotlin
+  select("body") {
+    fontSize(1.2.em)
+    borderWidth(3.px)
+    width(75.prc)
+  }
+```
+
+Result:
+
+```css
+body {
+  font-size:                    1.2em;
+  border-width:                 3px;
+  width:                        75%;
+}
+```
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -0,0 +1,13 @@
+pluginManagement {
+    repositories {
+        maven { setUrl("https://dl.bintray.com/kotlin/kotlin-eap") }
+
+        mavenCentral()
+
+        maven { setUrl("https://plugins.gradle.org/m2/") }
+    }
+}
+
+rootProject.name = "kotlin-css-generator"
+
+//enableFeaturePreview("GRADLE_METADATA")
--- a/src/commonMain/kotlin/nl/astraeus/css/CssBuilder.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/CssBuilder.kt
@@ -0,0 +1,30 @@
+package nl.astraeus.css
+
+import nl.astraeus.css.style.ConditionalCss
+import nl.astraeus.css.style.ConditionalStyle
+import nl.astraeus.css.style.Css
+import nl.astraeus.css.style.Style
+
+fun css(definition: Css) = definition
+
+fun style(definition: ConditionalCss): ConditionalStyle {
+  val css = ConditionalStyle()
+
+  definition(css)
+
+  return css
+}
+
+class CssBuilder {
+  var definition: Style = Style()
+
+  fun style(definition: Style.() -> Unit) {
+    definition(this.definition)
+  }
+
+  fun getCss(minified: Boolean = false): String = definition.generateCss(minified = minified)
+
+  override fun toString(): String {
+    return "CssBuilder(${definition.generateCss()})"
+  }
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/AlignContent.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/AlignContent.kt
@@ -0,0 +1,17 @@
+package nl.astraeus.css.properties
+
+class AlignContent(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val stretch = AlignContent("stretch")
+    val center = AlignContent("center")
+    val flexStart = AlignContent("flex-start")
+    val flexEnd = AlignContent("flex-end")
+    val spaceBetween = AlignContent("space-between")
+    val spaceAround = AlignContent("space-around")
+    val initial = AlignContent("initial")
+    val inherit = AlignContent("inherit")
+  }
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/AlignItems.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/AlignItems.kt
@@ -0,0 +1,17 @@
+package nl.astraeus.css.properties
+
+class AlignItems(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val stretch = AlignItems("stretch")
+    val center = AlignItems("center")
+    val flexStart = AlignItems("flex-start")
+    val flexEnd = AlignItems("flex-end")
+    val baseline = AlignItems("baseline")
+    val initial = AlignItems("initial")
+    val inherit = AlignItems("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/AlignSelf.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/AlignSelf.kt
@@ -0,0 +1,18 @@
+package nl.astraeus.css.properties
+
+class AlignSelf(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = AlignSelf("auto")
+    val stretch = AlignSelf("stretch")
+    val center = AlignSelf("center")
+    val flexStart = AlignSelf("flex-start")
+    val flexEnd = AlignSelf("flex-end")
+    val baseline = AlignSelf("baseline")
+    val initial = AlignSelf("initial")
+    val inherit = AlignSelf("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/All.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/All.kt
@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class All(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val unset = All("unset")
+    val revert = All("revert")
+    val initial = All("initial")
+    val inherit = All("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Animation.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Animation.kt
@@ -0,0 +1,55 @@
+package nl.astraeus.css.properties
+
+class AnimationDirection(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = AnimationDirection("normal")
+    val reverse = AnimationDirection("reverse")
+    val alternate = AnimationDirection("alternate")
+    val alternateReverse = AnimationDirection("alternate-reverse")
+    val initial = AnimationDirection("initial")
+    val inherit = AnimationDirection("inherit")
+  }
+}
+
+class AnimationFillMode(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = AnimationFillMode("none")
+    val forwards = AnimationFillMode("forwards")
+    val backwards = AnimationFillMode("backwards")
+    val both = AnimationFillMode("both")
+    val initial = AnimationFillMode("initial")
+    val inherit = AnimationFillMode("inherit")
+  }
+}
+
+class AnimationFrame(
+  value: String = ""
+) : CssProperty(value) {
+
+  companion object {
+    fun name(name: String) = AnimationFrame(name)
+    val none: AnimationFrame = AnimationFrame("none")
+    val initial: AnimationFrame = AnimationFrame("initial")
+    val inherit: AnimationFrame = AnimationFrame("inherit")
+  }
+}
+
+
+class AnimationPlayState(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    fun name(name: String) = AnimationPlayState(name)
+    val paused = AnimationPlayState("paused")
+    val running = AnimationPlayState("running")
+    val initial = AnimationPlayState("initial")
+    val inherit = AnimationPlayState("inherit")
+  }
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/BackfaceVisibility.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/BackfaceVisibility.kt
@@ -0,0 +1,13 @@
+package nl.astraeus.css.properties
+
+class BackfaceVisibility(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val visible = BackfaceVisibility("visible")
+    val hidden = BackfaceVisibility("hidden")
+    val initial = BackfaceVisibility("initial")
+    val inherit = BackfaceVisibility("inherit")
+  }
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Background.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Background.kt
@@ -0,0 +1,79 @@
+package nl.astraeus.css.properties
+
+class BackgroundAttachment(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val scroll = BackgroundAttachment("scroll")
+    val fixed = BackgroundAttachment("fixed")
+    val local = BackgroundAttachment("local")
+    val initial = BackgroundAttachment("initial")
+    val inherit = BackgroundAttachment("inherit")
+  }
+}
+
+class BackgroundBlendMode(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = BackgroundBlendMode("normal")
+    val multiply = BackgroundBlendMode("multiply")
+    val screen = BackgroundBlendMode("screen")
+    val overlay = BackgroundBlendMode("overlay")
+    val darken = BackgroundBlendMode("darken")
+    val lighten = BackgroundBlendMode("lighten")
+    val colorDodge = BackgroundBlendMode("color-dodge")
+    val saturation = BackgroundBlendMode("saturation")
+    val color = BackgroundBlendMode("color")
+    val luminosity = BackgroundBlendMode("luminosity")
+  }
+}
+
+class BackgroundPosition(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val left = BackgroundPosition("left")
+    val center = BackgroundPosition("center")
+    val right = BackgroundPosition("right")
+    val initial = BackgroundPosition("initial")
+    val inherit = BackgroundPosition("inherit")
+  }
+}
+
+class BackgroundRepeat(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val repeat = BackgroundRepeat("repeat")
+    val repeatX = BackgroundRepeat("repeat-x")
+    val repeatY = BackgroundRepeat("repeat-y")
+    val noRepeat = BackgroundRepeat("no-repeat")
+    val space = BackgroundRepeat("space")
+    val round = BackgroundRepeat("round")
+    val initial = BackgroundRepeat("initial")
+    val inherit = BackgroundRepeat("inherit")
+    val unset = BackgroundRepeat("unset")
+  }
+}
+
+class BackgroundSize(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    fun px(px: Int) = BackgroundSize("${px}px")
+    fun perc(pc: Double) = BackgroundSize("${pc}%")
+
+    val auto = BackgroundSize("auto")
+    val cover = BackgroundSize("cover")
+    val contain = BackgroundSize("contain")
+    val initial = BackgroundSize("initial")
+    val inherit = BackgroundSize("inherit")
+  }
+}
+
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Border.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Border.kt
@@ -0,0 +1,78 @@
+package nl.astraeus.css.properties
+
+class BorderStyle(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = BorderStyle("none")
+    val hidden = BorderStyle("hidden")
+    val dotted = BorderStyle("dotted")
+    val dashed = BorderStyle("dashed")
+    val solid = BorderStyle("solid")
+    val double = BorderStyle("double")
+    val groove = BorderStyle("groove")
+    val ridge = BorderStyle("ridge")
+    val inset = BorderStyle("inset")
+    val outset = BorderStyle("outset")
+    val initial = BorderStyle("initial")
+    val inherit = BorderStyle("inherit")
+  }
+}
+
+class BorderWidth(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val thin = BorderWidth("thin")
+    val medium = BorderWidth("medium")
+    val thick = BorderWidth("thick")
+    val initial = BorderWidth("initial")
+    val inherit = BorderWidth("inherit")
+  }
+}
+
+class BorderCollapse(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val separate = BorderCollapse("separate")
+    val collapse = BorderCollapse("collapse")
+  }
+}
+
+class BorderImageWidth(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    fun px(nr: Int) = BorderImageWidth("${nr}px")
+    fun nr(nr: Int) = BorderImageWidth("$nr")
+    fun perc(nr: Int) = BorderImageWidth("${nr}%")
+    fun perc(nr: Double) = BorderImageWidth("${nr}%")
+    val auto = BorderImageWidth("auto")
+    val initial = BorderImageWidth("initial")
+    val inherit = BorderImageWidth("inherit")
+  }
+}
+
+class BorderSpacing(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    fun px(nr: Int) = BorderSpacing("${nr}px")
+    fun em(nr: Int) = BorderSpacing("${nr}em")
+    fun em(nr: Double) = BorderSpacing("${nr}em")
+    fun perc(nr: Int) = BorderSpacing("${nr}%")
+    fun perc(nr: Double) = BorderSpacing("${nr}%")
+    fun pc(nr: Int) = BorderSpacing("${nr}pc")
+    fun pc(nr: Double) = BorderSpacing("${nr}pc")
+    fun cm(nr: Int) = BorderSpacing("${nr}cm")
+    fun cm(nr: Double) = BorderSpacing("${nr}cm")
+    val initial = BorderSpacing("initial")
+    val inherit = BorderSpacing("inherit")
+  }
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Box.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Box.kt
@@ -0,0 +1,40 @@
+package nl.astraeus.css.properties
+
+class BoxDecorationBreak(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val slice = BoxDecorationBreak("slice")
+    val clone = BoxDecorationBreak("clone")
+    val initial = BoxDecorationBreak("initial")
+    val inherit = BoxDecorationBreak("inherit")
+    val unset = BoxDecorationBreak("unset")
+  }
+}
+
+class BoxShadow(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = BoxShadow("none")
+    val inset = BoxShadow("inset")
+    val initial = BoxShadow("initial")
+    val inherit = BoxShadow("inherit")
+
+    fun text(txt: String) = BoxShadow(txt)
+  }
+}
+
+class BoxSizing(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val contextBox = BoxSizing("content-box")
+    val borderBox = BoxSizing("border-box")
+    val initial = BoxShadow("initial")
+    val inherit = BoxShadow("inherit")
+  }
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Break.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Break.kt
@@ -0,0 +1,27 @@
+package nl.astraeus.css.properties
+
+
+class Break(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = Break("auto")
+    val all = Break("all")
+    val always = Break("always")
+    val avoid = Break("avoid")
+    val avoidColumn = Break("avoid-column")
+    val avoidPage = Break("avoid-page")
+    val avoidRegion = Break("avoid-region")
+    val column = Break("column")
+    val left = Break("left")
+    val page = Break("page")
+    val recto = Break("recto")
+    val region = Break("region")
+    val right = Break("right")
+    val verso = Break("verso")
+    val initial = Break("initial")
+    val inherit = Break("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Caption.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Caption.kt
@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class CaptionSide(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val top = CaptionSide("top")
+    val bottom = CaptionSide("bottom")
+    val initial = CaptionSide("initial")
+    val inherit = CaptionSide("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Clear.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Clear.kt
@@ -0,0 +1,17 @@
+package nl.astraeus.css.properties
+
+
+class Clear(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = Clear("none")
+    val left = Clear("left")
+    val right = Clear("right")
+    val both = Clear("both")
+    val initial = Clear("initial")
+    val inherit = Clear("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Clip.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Clip.kt
@@ -0,0 +1,57 @@
+package nl.astraeus.css.properties
+
+class Clip(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    fun rect(top: Int, right: Int, bottom: Int, left: Int) = Clip("rect(${top}px,${right}px,${bottom}px,${left}px)")
+    val auto = Clip("auto")
+    val initial = Clip("initial")
+    val inherit = Clip("inherit")
+
+  }
+}
+
+class ClipPath(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = ClipPath("auto")
+    fun circle(perc: Double) = ClipPath("circle(${perc}%)")
+    fun ellipse(radiusX: Double, radiusY: Double) = ClipPath("ellipse(${radiusX}%,${radiusY}%)")
+    fun ellipse(
+      radiusX: Double,
+      radiusY: Double,
+      positionX: Double,
+      positionY: Double
+    ) = ClipPath("ellipse(${radiusX}%,${radiusY}% at ${positionX}%,${positionY}%)")
+
+    // todo: other options
+    fun other(text: String) = ClipPath(text)
+
+    val marginBox = ClipPath("margin-box")
+    val borderBox = ClipPath("border-box")
+    val paddingBox = ClipPath("padding-box")
+    val contentBox = ClipPath("content-box")
+    val fillBox = ClipPath("fill-box")
+    val strokeBox = ClipPath("stroke-box")
+    val viewBox = ClipPath("view-box")
+    val none = ClipPath("none")
+  }
+}
+
+class ClipOrigin(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val borderBox = ClipOrigin("border-box")
+    val paddingBox = ClipOrigin("padding-box")
+    val contentBox = ClipOrigin("content-box")
+    val initial = ClipOrigin("initial")
+    val inherit = ClipOrigin("inherit")
+
+  }
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Color.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Color.kt
@@ -0,0 +1,594 @@
+package nl.astraeus.css.properties
+
+import kotlin.math.PI
+import kotlin.math.abs
+import kotlin.math.max
+import kotlin.math.roundToInt
+
+private val hexString = "0123456789abcdef"
+
+private fun Int.toColorHex(minimumDigits: Int = 2): String {
+  val result = StringBuilder()
+  var value = this
+
+  while(value > 0) {
+    result.append(hexString[value%16])
+
+    value /= 16
+  }
+
+  while(result.length < minimumDigits) {
+    result.append("0")
+  }
+
+  return result.reverse().toString()
+}
+
+/**
+ * See [CSS Color Module Level 3](https://www.w3.org/TR/2018/REC-css-color-3-20180619/)
+ *
+ * This class represents a CSS color value. String parameters to the constructor argument
+ * can take one of the following forms:
+ *
+ *  * HTML color name, e.g. ``Red``, ``DarkSalmon`` (case-insensitive), though in this case the use of the pre-defined constants is recommended.
+ *  * ``#rgb`` or ``#rrggbb``
+ *  * ``rgb(0..255, 0..255, 0..255)``, ``rgb(0..100%, 0..100%, 0..100%)``, ``rgb(0..100%, 0..100%, 0..100%, 0..1)``, ``rgba(0..255, 0..255, 0..255, 0..1)``
+ *  * ``hsl(0..360, 0-100%, 0..100%)`` or ``hsla(0..360, 0-100%, 0..100%, 0..1)``
+ *
+ * Technically, the Hue parameter to ``hsl`` or ``hsla`` can exceed ``360``, because it represents a *degree* (angle) on
+ * the color wheel. But as per the algorithm proposed by the W3C, the value will ultimately be capped to ``360`` through
+ * a series of modulus operations; see section *4.2.4. HSL color values* of the above specification.
+ *
+ * Taken from: https://github.com/JetBrains/kotlin-wrappers/tree/master/kotlin-css
+ */
+@Suppress("SpellCheckingInspection")
+class Color(value: String) : CssProperty(value) {
+  private var rgb: String? = null
+
+  private constructor(value: String, rgb: String) : this(value) {
+    this.rgb = rgb
+  }
+
+  fun hasAlpha(): Boolean = isRgba() || isHexa() || isHsla()
+
+  fun getAlpha(): Double = when {
+    isHexa() || isRgba() -> {
+      toRGBA().alpha
+    }
+    isHsla() -> {
+      fromHSLANotation().alpha
+    }
+    else -> {
+      1.0
+    }
+  }
+
+  fun toHex(): String  = if (isHsla() || isHsl()) {
+    fromHSLANotation().asRGBA().asHex()
+  } else {
+    toRGBA().asHex()
+  }
+
+  fun isHsla(): Boolean {
+    val v = rgb ?: value
+
+    return v.startsWith("hsla")
+  }
+
+  fun isHsl(): Boolean {
+    val v = rgb ?: value
+
+    return v.startsWith("hsl(")
+  }
+
+  fun isRgba(): Boolean {
+    val v = rgb ?: value
+
+    return v.startsWith("rgba(")
+  }
+
+  fun isRgb(): Boolean {
+    val v = rgb ?: value
+
+    return v.startsWith("rgb(")
+  }
+
+  fun isHex(): Boolean {
+    val v = rgb ?: value
+
+    return v.startsWith("#") && v.length < 8
+  }
+
+  fun isHexa(): Boolean {
+    val v = rgb ?: value
+
+    return v.startsWith("#") && v.length > 7
+  }
+
+  /**
+   * withAlpha preserves existing alpha value: rgba(0, 0, 0, 0.5).withAlpha(0.1) = rgba(0, 0, 0, 0.05)
+   */
+  fun withAlpha(alpha: Double) =
+    when {
+      value.startsWith("hsl", true) -> with(fromHSLANotation()) { hsla(hue, saturation, lightness, normalizeAlpha(alpha) * this.alpha) }
+      else -> with(toRGBA()) { rgba(red, green, blue, normalizeAlpha(alpha) * this.alpha) }
+    }
+
+  /**
+   * changeAlpha rewrites existing alpha value: rgba(0, 0, 0, 0.5).withAlpha(0.1) = rgba(0, 0, 0, 0.1)
+   */
+  fun changeAlpha(alpha: Double) =
+    when {
+      value.startsWith("hsl", true) -> with(fromHSLANotation()) { hsla(hue, saturation, lightness, normalizeAlpha(alpha)) }
+      else -> with(toRGBA()) { rgba(red, green, blue, normalizeAlpha(alpha)) }
+    }
+
+  // https://stackoverflow.com/questions/2049230/convert-rgba-color-to-rgb
+  fun blend(backgroundColor: Color): Color {
+    val source = this.toRGBA()
+    val background = backgroundColor.toRGBA()
+
+    val targetR = ((1 - source.alpha) * background.red) + (source.alpha * source.red)
+    val targetG = ((1 - source.alpha) * background.green) + (source.alpha * source.green)
+    val targetB = ((1 - source.alpha) * background.blue) + (source.alpha * source.blue)
+
+    return rgb(targetR.roundToInt(), targetG.roundToInt(), targetB.roundToInt())
+  }
+
+  /**
+   * Lighten the color by the specified percent (between 0-100), returning a new instance of Color.
+   *
+   * @param percent the percent to lighten the Color
+   * @return a new lightened version of this color
+   */
+  fun lighten(percent: Int): Color {
+    val isHSLA = value.startsWith("hsl", ignoreCase = true)
+    val hsla = if (isHSLA) fromHSLANotation() else toRGBA().asHSLA()
+
+    val lightness = hsla.lightness + (hsla.lightness * (normalizePercent(percent) / 100.0)).roundToInt()
+    val newHSLa = hsla.copy(lightness = normalizePercent(lightness))
+    return if (isHSLA) {
+      hsla(newHSLa.hue, newHSLa.saturation, newHSLa.lightness, newHSLa.alpha)
+    } else {
+      with(newHSLa.asRGBA()) { rgba(red, green, blue, alpha) }
+    }
+  }
+
+  /**
+   * Darken the color by the specified percent (between 0-100), returning a new instance of Color.
+   *
+   * @param percent the percent to darken the Color
+   * @return a new darkened version of this color
+   */
+  fun darken(percent: Int): Color {
+    val isHSLA = value.startsWith("hsl", ignoreCase = true)
+    val hsla = if (isHSLA) fromHSLANotation() else toRGBA().asHSLA()
+
+    val darkness = hsla.lightness - (hsla.lightness * (normalizePercent(percent) / 100.0)).roundToInt()
+    val newHSLa = hsla.copy(lightness = normalizePercent(darkness))
+    return if (isHSLA) {
+      hsla(newHSLa.hue, newHSLa.saturation, newHSLa.lightness, newHSLa.alpha)
+    } else {
+      with(newHSLa.asRGBA()) { rgba(red, green, blue, alpha) }
+    }
+  }
+
+  /**
+   * Increase contrast, if lightness > 50 then darken else lighten
+   *
+   * @param percent the percent to lighten/darken the Color
+   * @return a new ligtened/darkened version of this color
+   */
+  fun contrast(percent: Int): Color {
+    val isHSLA = value.startsWith("hsl", ignoreCase = true)
+    val hsla = if (isHSLA) fromHSLANotation() else toRGBA().asHSLA()
+
+    val darkness = if (hsla.lightness > 50) {
+      hsla.lightness - (hsla.lightness * (normalizePercent(percent) / 100.0)).roundToInt()
+    } else {
+      hsla.lightness + (hsla.lightness * (normalizePercent(percent) / 100.0)).roundToInt()
+    }
+
+    val newHSLa = hsla.copy(lightness = normalizePercent(darkness))
+    return if (isHSLA) {
+      hsla(newHSLa.hue, newHSLa.saturation, newHSLa.lightness, newHSLa.alpha)
+    } else {
+      with(newHSLa.asRGBA()) { rgba(red, green, blue, alpha) }
+    }
+  }
+
+  /**
+   * Saturate the color by the specified percent (between 0-100), returning a new instance of Color.
+   *
+   * @param percent the percent to saturate the Color
+   * @return a new saturated version of this color
+   */
+  fun saturate(percent: Int): Color {
+    val isHSLA = value.startsWith("hsl", ignoreCase = true)
+    val hsla = if (isHSLA) fromHSLANotation() else toRGBA().asHSLA()
+
+    val saturation = hsla.saturation + (hsla.saturation * (normalizePercent(percent) / 100.0)).roundToInt()
+    val newHSLa = hsla.copy(saturation = normalizePercent(saturation))
+    return if (isHSLA) {
+      hsla(newHSLa.hue, newHSLa.saturation, newHSLa.lightness, newHSLa.alpha)
+    } else {
+      with(newHSLa.asRGBA()) { rgba(red, green, blue, alpha) }
+    }
+  }
+
+  /**
+   * Desaturate the color by the specified percent (between 0-100), returning a new instance of Color.
+   *
+   * @param percent the percent to desaturate the Color
+   * @return a new desaturated version of this color
+   */
+  fun desaturate(percent: Int): Color {
+    val isHSLA = value.startsWith("hsl", ignoreCase = true)
+    val hsla = if (isHSLA) fromHSLANotation() else toRGBA().asHSLA()
+
+    val desaturation = hsla.saturation - (hsla.saturation * (normalizePercent(percent) / 100.0)).roundToInt()
+    val newHSLa = hsla.copy(saturation = normalizePercent(desaturation))
+    return if (isHSLA) {
+      hsla(newHSLa.hue, newHSLa.saturation, newHSLa.lightness, newHSLa.alpha)
+    } else {
+      with(newHSLa.asRGBA()) { rgba(red, green, blue, alpha) }
+    }
+  }
+
+  internal data class RGBA(
+    val red: Int,
+    val green: Int,
+    val blue: Int,
+    val alpha: Double = 1.0
+  ) {
+
+    // Algorithm adapted from http://www.niwa.nu/2013/05/math-behind-colorspace-conversions-rgb-hsl/
+    fun asHSLA(): HSLA {
+      // scale R, G, B values into 0..1 fractions
+      val r = red / 255.0
+      val g = green / 255.0
+      val b = blue / 255.0
+
+      val cMax = maxOf(r, g, b)
+      val cMin = minOf(r, g, b)
+      val chroma = cMax - cMin
+
+      val lg = normalizeFractionalPercent((cMax + cMin) / 2)
+      val s = if (chroma != 0.0) normalizeFractionalPercent(chroma / (1.0 - abs((2.0 * lg) - 1.0))) else 0.0
+      val h = when (cMax) {
+        cMin -> 0.0
+        r -> 60 * (((g - b) / chroma) % 6.0)
+        g -> 60 * (((b - r) / chroma) + 2)
+        b -> 60 * (((r - g) / chroma) + 4)
+        else -> error("Unexpected value for max") // theoretically unreachable bc maxOf(r, g, b) above
+      }
+
+      return HSLA(normalizeHue(h), (s * 100).roundToInt(), (lg * 100).roundToInt(), alpha)
+    }
+
+    fun asHex(): String {
+      val result = StringBuilder()
+
+      result.append(red.toColorHex(2))
+      result.append(green.toColorHex(2))
+      result.append(blue.toColorHex(2))
+
+      return result.toString()
+    }
+  }
+
+  internal data class HSLA(
+    val hue: Int,
+    val saturation: Int,
+    val lightness: Int,
+    val alpha: Double = 1.0
+  ) {
+
+    // Algorithm from W3C link referenced in class comment (section 4.2.4. HSL color values)
+    fun asRGBA(): RGBA {
+      fun hueToRGB(m1: Double, m2: Double, h: Double): Double {
+        val hu = if (h < 0) h + 1 else if (h > 1) h - 1 else h
+        return when {
+          (hu < 1.0 / 6) -> m1 + (m2 - m1) * 6 * hu
+          (hu < 1.0 / 2) -> m2
+          (hu < 2.0 / 3) -> m1 + ((m2 - m1) * 6 * (2.0 / 3 - hu))
+          else -> m1
+        }
+      }
+
+      val lightness255 = lightness * 255 / 100
+      if (saturation == 0) return RGBA(lightness255, lightness255, lightness255)
+
+      // scale H, S, V values into 0..1 fractions
+      val h = (hue % 360.0) / 360.0
+      val s = saturation / 100.0
+      val lg = lightness / 100.0
+
+      val m2 = if (lg < 0.5) lg * (1 + s) else (lg + s - lg * s)
+      val m1 = 2 * lg - m2
+      val r = normalizeFractionalPercent(hueToRGB(m1, m2, h + (1.0 / 3)))
+      val g = normalizeFractionalPercent(hueToRGB(m1, m2, h))
+      val b = normalizeFractionalPercent(hueToRGB(m1, m2, h - (1.0 / 3)))
+      return RGBA((r * 255).roundToInt(), (g * 255).roundToInt(), (b * 255).roundToInt(), alpha)
+    }
+  }
+
+  internal fun fromHSLANotation(): HSLA {
+    val match = HSLA_REGEX.find(value)
+
+    fun getHSLParameter(index: Int) =
+      match?.groups?.get(index)?.value
+        ?: throw IllegalArgumentException("Expected hsl or hsla notation, got $value")
+
+    val hueShape = getHSLParameter(1)
+    val hue = normalizeHue(
+      when {
+        hueShape.endsWith("grad", true) -> hueShape.substringBefore("grad").toDouble() * (9.0 / 10)
+        hueShape.endsWith("rad", true) -> (hueShape.substringBefore("rad").toDouble() * 180) / PI
+        hueShape.endsWith("turn", true) -> hueShape.substringBefore("turn").toDouble() * 360.0
+        hueShape.endsWith("deg", true) -> hueShape.substringBefore("deg").toDouble()
+        else -> hueShape.toDouble()
+      }
+    )
+    val saturation = normalizePercent(getHSLParameter(2).toInt())
+    val lightness = normalizePercent(getHSLParameter(3).toInt())
+    val alpha = normalizeAlpha(match?.groups?.get(4)?.value?.toDouble() ?: 1.0)
+
+    return HSLA(hue, saturation, lightness, alpha)
+  }
+
+  internal fun fromRGBANotation(): RGBA {
+    val match = RGBA_REGEX.find(value)
+
+    fun getRGBParameter(index: Int): Int {
+      val group = match?.groups?.get(index)?.value
+        ?: throw IllegalArgumentException("Expected rgb or rgba notation, got $value")
+
+      return when {
+        (group.endsWith('%')) -> (normalizeFractionalPercent(group.substringBefore('%').toDouble() / 100.0) * 255.0).toInt()
+        else -> normalizeRGB(group.toInt())
+      }
+    }
+
+    val red = getRGBParameter(1)
+    val green = getRGBParameter(2)
+    val blue = getRGBParameter(3)
+    val alpha = normalizeAlpha(match?.groups?.get(4)?.value?.toDouble() ?: 1.0)
+
+    return RGBA(red, green, blue, alpha)
+  }
+
+  internal fun toRGBA(): RGBA {
+    val v = rgb ?: value
+    return when {
+      v.startsWith("rgb") -> fromRGBANotation()
+
+      // Matches #rgb
+      v.startsWith("#") && v.length == 4 -> RGBA(
+        "${v[1]}${v[1]}".toInt(16),
+        "${v[2]}${v[2]}".toInt(16),
+        "${v[3]}${v[3]}".toInt(16)
+      )
+
+      // Matches both #rrggbb
+      v.startsWith("#") && v.length == 7 -> RGBA(
+        (v.substring(1..2)).toInt(16),
+        (v.substring(3..4)).toInt(16),
+        (v.substring(5..6)).toInt(16)
+      )
+
+      // Matches both #rrggbbaa
+      v.startsWith("#") && v.length == 9 -> RGBA(
+        (v.substring(1..2)).toInt(16),
+        (v.substring(3..4)).toInt(16),
+        (v.substring(5..6)).toInt(16),
+        (v.substring(7..8)).toInt(16) / 255.0
+      )
+      else -> throw IllegalArgumentException("Only hexadecimal, rgb, and rgba notations are accepted, got $v")
+    }
+  }
+
+  companion object {
+    val initial = Color("initial")
+    val inherit = Color("inherit")
+    val unset = Color("unset")
+
+    val transparent = Color("transparent")
+    val currentColor = Color("currentColor")
+
+    // W3C predefined HTML colors (147), see the referenced specification above.
+    val aliceBlue = Color("aliceblue", "#f0f8ff")
+    val antiqueWhite = Color("antiquewhite", "#faebd7")
+    val aqua = Color("aqua", "#00ffff")
+    val aquamarine = Color("aquamarine", "#7fffd4")
+    val azure = Color("azure", "#f0ffff")
+    val beige = Color("beige", "#f5f5dc")
+    val bisque = Color("bisque", "#ffe4c4")
+    val black = Color("black", "#000000")
+    val blanchedAlmond = Color("blanchedalmond", "#ffebcd")
+    val blue = Color("blue", "#0000ff")
+    val blueViolet = Color("blueviolet", "#8a2be2")
+    val brown = Color("brown", "#a52a2a")
+    val burlyWood = Color("burlywood", "#deb887")
+    val cadetBlue = Color("cadetblue", "#5f9ea0")
+    val chartreuse = Color("chartreuse", "#7fff00")
+    val chocolate = Color("chocolate", "#d2691e")
+    val coral = Color("coral", "#ff7f50")
+    val cornflowerBlue = Color("cornflowerblue", "#6495ed")
+    val cornsilk = Color("cornsilk", "#fff8dc")
+    val crimson = Color("crimson", "#dc143c")
+    val cyan = Color("cyan", "#00ffff")
+    val darkBlue = Color("darkblue", "#00008b")
+    val darkCyan = Color("darkcyan", "#008b8b")
+    val darkGoldenrod = Color("darkgoldenrod", "#b8860b")
+    val darkGray = Color("darkgray", "#a9a9a9")
+    val darkGreen = Color("darkgreen", "#006400")
+    val darkGrey = Color("darkgrey", "#a9a9a9")
+    val darkKhaki = Color("darkkhaki", "#bdb76b")
+    val darkMagenta = Color("darkmagenta", "#8b008b")
+    val darkOliveGreen = Color("darkolivegreen", "#556b2f")
+    val darkOrange = Color("darkorange", "#ff8c00")
+    val darkOrchid = Color("darkorchid", "#9932cc")
+    val darkRed = Color("darkred", "#8b0000")
+    val darkSalmon = Color("darksalmon", "#e9967a")
+    val darkSeaGreen = Color("darkseagreen", "#8fbc8f")
+    val darkSlateBlue = Color("darkslateblue", "#483d8b")
+    val darkSlateGray = Color("darkslategray", "#2f4f4f")
+    val darkSlateGrey = Color("darkslategrey", "#2f4f4f")
+    val darkTurquoise = Color("darkturquoise", "#00ced1")
+    val darkViolet = Color("darkviolet", "#9400d3")
+    val deepPink = Color("deeppink", "#ff1493")
+    val deepSkyBlue = Color("deepskyblue", "#00bfff")
+    val dimGray = Color("dimgray", "#696969")
+    val dimGrey = Color("dimgrey", "#696969")
+    val dodgerBlue = Color("dodgerblue", "#1e90ff")
+    val firebrick = Color("firebrick", "#b22222")
+    val floralWhite = Color("floralwhite", "#fffaf0")
+    val forestGreen = Color("forestgreen", "#228b22")
+    val fuchsia = Color("fuchsia", "#ff00ff")
+    val gainsboro = Color("gainsboro", "#dcdcdc")
+    val ghostWhite = Color("ghostwhite", "#f8f8ff")
+    val gold = Color("gold", "#ffd700")
+    val goldenrod = Color("goldenrod", "#daa520")
+    val gray = Color("gray", "#808080")
+    val green = Color("green", "#008000")
+    val greenYellow = Color("greenyellow", "#adff2f")
+    val grey = Color("grey", "#808080")
+    val honeydew = Color("honeydew", "#f0fff0")
+    val hotPink = Color("hotpink", "#ff69b4")
+    val indianRed = Color("indianred", "#cd5c5c")
+    val indigo = Color("indigo", "#4b0082")
+    val ivory = Color("ivory", "#fffff0")
+    val khaki = Color("khaki", "#f0e68c")
+    val lavender = Color("lavender", "#e6e6fa")
+    val lavenderBlush = Color("lavenderblush", "#fff0f5")
+    val lawnGreen = Color("lawngreen", "#7cfc00")
+    val lemonChiffon = Color("lemonchiffon", "#fffacd")
+    val lightBlue = Color("lightblue", "#add8e6")
+    val lightCoral = Color("lightcoral", "#f08080")
+    val lightCyan = Color("lightcyan", "#e0ffff")
+    val lightGoldenrodYellow = Color("lightgoldenrodyellow", "#fafad2")
+    val lightGray = Color("lightgray", "#d3d3d3")
+    val lightGreen = Color("lightgreen", "#90ee90")
+    val lightGrey = Color("lightgrey", "#d3d3d3")
+    val lightPink = Color("lightpink", "#ffb6c1")
+    val lightSalmon = Color("lightsalmon", "#ffa07a")
+    val lightSeaGreen = Color("lightseagreen", "#20b2aa")
+    val lightSkyBlue = Color("lightskyblue", "#87cefa")
+    val lightSlateGray = Color("lightslategray", "#778899")
+    val lightSlateGrey = Color("lightslategrey", "#778899")
+    val lightSteelBlue = Color("lightsteelblue", "#b0c4de")
+    val lightYellow = Color("lightyellow", "#ffffe0")
+    val lime = Color("lime", "#00ff00")
+    val limeGreen = Color("limegreen", "#32cd32")
+    val linen = Color("linen", "#faf0e6")
+    val magenta = Color("magenta", "#ff00ff")
+    val maroon = Color("maroon", "#800000")
+    val mediumAquamarine = Color("mediumaquamarine", "#66cdaa")
+    val mediumBlue = Color("mediumblue", "#0000cd")
+    val mediumOrchid = Color("mediumorchid", "#ba55d3")
+    val mediumPurple = Color("mediumpurple", "#9370d8")
+    val mediumSeaGreen = Color("mediumseagreen", "#3cb371")
+    val mediumSlateBlue = Color("mediumslateblue", "#7b68ee")
+    val mediumSpringGreen = Color("mediumspringgreen", "#00fa9a")
+    val mediumTurquoise = Color("mediumturquoise", "#48d1cc")
+    val mediumVioletRed = Color("mediumvioletred", "#c71585")
+    val midnightBlue = Color("midnightblue", "#191970")
+    val mintCream = Color("mintcream", "#f5fffa")
+    val mistyRose = Color("mistyrose", "#ffe4e1")
+    val moccasin = Color("moccasin", "#ffe4b5")
+    val navajoWhite = Color("navajowhite", "#ffdead")
+    val navy = Color("navy", "#000080")
+    val oldLace = Color("oldlace", "#fdf5e6")
+    val olive = Color("olive", "#808000")
+    val oliveDrab = Color("olivedrab", "#6b8e23")
+    val orange = Color("orange", "#ffa500")
+    val orangeRed = Color("orangered", "#ff4500")
+    val orchid = Color("orchid", "#da70d6")
+    val paleGoldenrod = Color("palegoldenrod", "#eee8aa")
+    val paleGreen = Color("palegreen", "#98fb98")
+    val paleTurquoise = Color("paleturquoise", "#afeeee")
+    val paleVioletRed = Color("palevioletred", "#db7093")
+    val papayaWhip = Color("papayawhip", "#ffefd5")
+    val peachPuff = Color("peachpuff", "#ffdab9")
+    val peru = Color("peru", "#cd853f")
+    val pink = Color("pink", "#ffc0cb")
+    val plum = Color("plum", "#dda0dd")
+    val powderBlue = Color("powderblue", "#b0e0e6")
+    val purple = Color("purple", "#800080")
+    val red = Color("red", "#ff0000")
+    val rosyBrown = Color("rosybrown", "#bc8f8f")
+    val royalBlue = Color("royalblue", "#4169e1")
+    val saddleBrown = Color("saddlebrown", "#8b4513")
+    val salmon = Color("salmon", "#fa8072")
+    val sandyBrown = Color("sandybrown", "#f4a460")
+    val seaGreen = Color("seagreen", "#2e8b57")
+    val seaShell = Color("seashell", "#fff5ee")
+    val sienna = Color("sienna", "#a0522d")
+    val silver = Color("silver", "#c0c0c0")
+    val skyBlue = Color("skyblue", "#87ceeb")
+    val slateBlue = Color("slateblue", "#6a5acd")
+    val slateGray = Color("slategray", "#708090")
+    val slateGrey = Color("slategrey", "#708090")
+    val snow = Color("snow", "#fffafa")
+    val springGreen = Color("springgreen", "#00ff7f")
+    val steelBlue = Color("steelblue", "#4682b4")
+    val tan = Color("tan", "#d2b48c")
+    val teal = Color("teal", "#008080")
+    val thistle = Color("thistle", "#d8bfd8")
+    val tomato = Color("tomato", "#ff6347")
+    val turquoise = Color("turquoise", "#40e0d0")
+    val violet = Color("violet", "#ee82ee")
+    val wheat = Color("wheat", "#f5deb3")
+    val white = Color("white", "#ffffff")
+    val whiteSmoke = Color("whitesmoke", "#f5f5f5")
+    val yellow = Color("yellow", "#ffff00")
+    val yellowGreen = Color("yellowgreen", "#9acd32")
+
+    fun normalizeFractionalPercent(value: Double): Double =
+      value.coerceIn(minimumValue = 0.0, maximumValue = 1.0)
+
+    fun normalizePercent(value: Int): Int =
+      value.coerceIn(minimumValue = 0, maximumValue = 100)
+
+    fun normalizeRGB(value: Int): Int =
+      value.coerceIn(minimumValue = 0, maximumValue = 255)
+
+    // algorithm for capping from W3C
+    fun normalizeHue(value: Double): Int =
+      (((value % 360) + 360) % 360).roundToInt()
+
+    fun normalizeAlpha(value: Double): Double =
+      normalizeFractionalPercent(value)
+
+    // Match for hsl(int, int%, int%) | hsla(int, int%, int%, 0.5) | etc.
+    private val HSLA_REGEX by lazy {
+      Regex(
+        "^hsla?\\((-?[0-9]+\\.?[0-9]*(?:deg|grad|rad|turn)?)\\s*[, ]?\\s*(\\d{1,3})%\\s*[, ]\\s*(\\d{1,3})%\\s*[, ]?\\s*(\\d|(?:\\d?\\.\\d+))?\\)\$",
+        RegexOption.IGNORE_CASE
+      )
+    }
+
+    // Match for rgb(255, 255, 255) | rgba(255, 255, 255, 0.5) | rgb(100% 100% 100%) | etc.
+    private val RGBA_REGEX by lazy {
+      Regex(
+        "^rgba?\\((\\d{1,3}%?)\\s*[, ]\\s*(\\d{1,3}%?)\\s*[, ]\\s*(\\d{1,3}%?)[, ]?\\s*(\\d|(?:\\d?\\.\\d+))?\\)\$",
+        RegexOption.IGNORE_CASE
+      )
+    }
+  }
+}
+
+private fun String.withZeros() = this + "0".repeat(max(0, 3 - this.length))
+fun hex(value: Int) = Color("#${value.toString(16).withZeros()}")
+fun rgb(red: Int, green: Int, blue: Int) = Color("rgb($red, $green, $blue)")
+fun rgba(red: Int, green: Int, blue: Int, alpha: Double) = Color("rgba($red, $green, $blue, ${formatAlpha(alpha)})")
+fun hsl(hue: Int, saturation: Int, lightness: Int) = Color("hsl($hue, $saturation%, $lightness%)")
+fun hsla(hue: Int, saturation: Int, lightness: Int, alpha: Double) = Color("hsla($hue, $saturation%, $lightness%, ${formatAlpha(alpha)})")
+fun blackAlpha(alpha: Double) = Color.black.withAlpha(alpha)
+fun whiteAlpha(alpha: Double) = Color.white.withAlpha(alpha)
+
+private fun formatAlpha(alpha: Double): String =
+  alpha.toString().let {
+    if ("." in it) it else "$it.0"
+  }
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Common.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Common.kt
@@ -0,0 +1,33 @@
+package nl.astraeus.css.properties
+
+class Length(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    fun px(nr: Int) = Length("${nr}px")
+    fun em(nr: Int) = Length("${nr}em")
+    fun em(nr: Double) = Length("${nr}em")
+    fun perc(nr: Int) = Length("${nr}%")
+    fun perc(nr: Double) = Length("${nr}%")
+    fun pc(nr: Int) = Length("${nr}pc")
+    fun pc(nr: Double) = Length("${nr}pc")
+    fun cm(nr: Int) = Length("${nr}cm")
+    fun cm(nr: Double) = Length("${nr}cm")
+    val initial = Length("initial")
+    val inherit = Length("inherit")
+  }
+
+}
+
+class Fill(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val balance = Fill("balance")
+    val auto = Fill("auto")
+    val initial = Fill("initial")
+    val inherit = Fill("inherit")
+  }
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Content.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Content.kt
@@ -0,0 +1,23 @@
+package nl.astraeus.css.properties
+
+class Content(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = Content("normal")
+    val none = Content("none")
+    val counter = Content("counter")
+    val openQuote = Content("open-quote")
+    val closeQuote = Content("close-quote")
+    val noOpenQuote = Content("no-open-quote")
+    val noCloseQuote = Content("no-close-quote")
+    val initial = Content("initial")
+    val inherit = Content("inherit")
+
+    fun attr(attribute: String) = Content("attr($attribute)")
+    fun string(txt: String) = Content("\"$txt\"")
+    fun url(url: String) = Content("url($url)")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Count.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Count.kt
@@ -0,0 +1,15 @@
+package nl.astraeus.css.properties
+
+class Count(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto: Count = Count("auto")
+    val infinite: Count = Count("infinite")
+    val initial: Count = Count("initial")
+    val inherit: Count = Count("inherit")
+
+    fun count(number: Int): Count = Count("$number")
+  }
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/CssFloat.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/CssFloat.kt
@@ -0,0 +1,15 @@
+package nl.astraeus.css.properties
+
+class CssFloat(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = CssFloat("none")
+    val left = CssFloat("left")
+    val right = CssFloat("right")
+    val initial = CssFloat("initial")
+    val inherit = CssFloat("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/CssProperty.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/CssProperty.kt
@@ -0,0 +1,19 @@
+package nl.astraeus.css.properties
+
+interface CssValue {
+  fun css(): String
+}
+
+open class CssProperty(
+  var value: String
+) : CssValue {
+
+  override fun css(): String = value
+
+}
+
+fun text(value: String) = TextProperty(value)
+
+class TextProperty(
+  value: String
+) : CssProperty(value)
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/DelayDuration.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/DelayDuration.kt
@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class DelayDuration(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val initial = DelayDuration("initial")
+    val inherit = DelayDuration("inherit")
+
+    fun seconds(seconds: Int) = DelayDuration("${seconds}s")
+    fun millis(milliSeconds: Int) = DelayDuration("${milliSeconds}ms")
+  }
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Direction.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Direction.kt
@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class Direction(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val ltr = Direction("ltr")
+    val rtl = Direction("rtl")
+    val initial = Direction("initial")
+    val inherit = Direction("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Display.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Display.kt
@@ -0,0 +1,33 @@
+package nl.astraeus.css.properties
+
+class Display(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val inline = Display("inline")
+    val block = Display("block")
+    val contents = Display("contents")
+    val flex = Display("flex")
+    val grid = Display("grid")
+    val inlineBlock = Display("inline-block")
+    val inlineFlex = Display("inline-flex")
+    val inlineGrid = Display("inline-grid")
+    val inlineTable = Display("inline-table")
+    val listItem = Display("list-item")
+    val runIn = Display("run-in")
+    val table = Display("table")
+    val tableCaption = Display("table-caption")
+    val tableColumnGroup = Display("table-column-group")
+    val tableHeaderGroup = Display("table-header-group")
+    val tableFooterGroup = Display("table-footer-group")
+    val tableRowGroup = Display("table-row-group")
+    val tableCell = Display("table-cell")
+    val tableColumn = Display("table-column")
+    val tableRow = Display("table-row")
+    val none = Display("none")
+    val initial = Display("initial")
+    val inherit = Display("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/EmptyCells.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/EmptyCells.kt
@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class EmptyCells(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val show = EmptyCells("show")
+    val hide = EmptyCells("hide")
+    val initial = EmptyCells("initial")
+    val inherit = EmptyCells("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Flex.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Flex.kt
@@ -0,0 +1,43 @@
+package nl.astraeus.css.properties
+
+class FlexDirection(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val row = FlexDirection("row")
+    val rowReverse = FlexDirection("row-reverse")
+    val column = FlexDirection("column")
+    val columnReverse = FlexDirection("column-reverse")
+    val initial = FlexDirection("initial")
+    val inherit = FlexDirection("inherit")
+  }
+
+}
+
+class FlexGrowShrink(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val initial = FlexGrowShrink("initial")
+    val inherit = FlexGrowShrink("inherit")
+
+    fun number(number: Int) = FlexGrowShrink("$number")
+  }
+
+}
+
+class FlexWrap(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val nowrap = FlexWrap("nowrap")
+    val wrap = FlexWrap("wrap")
+    val wrapReverse = FlexWrap("wrap-reverse")
+    val initial = FlexWrap("initial")
+    val inherit = FlexWrap("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Font.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Font.kt
@@ -0,0 +1,142 @@
+package nl.astraeus.css.properties
+
+class FontSize(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val xxSmall = FontSize("xx-small")
+    val xSmall = FontSize("x-small")
+    val small = FontSize("small")
+    val medium = FontSize("medium")
+    val large = FontSize("large")
+    val xLarge = FontSize("x-large")
+    val xxLarge = FontSize("xx-large")
+    val smaller = FontSize("smaller")
+    val larger = FontSize("larger")
+    val initial = FontSize("initial")
+    val inherit = FontSize("inherit")
+
+    fun px(nr: Int) = FontSize("${nr}px")
+    fun em(nr: Int) = FontSize("${nr}em")
+    fun em(nr: Double) = FontSize("${nr}em")
+    fun perc(nr: Int) = FontSize("${nr}%")
+    fun perc(nr: Double) = FontSize("${nr}%")
+    fun pc(nr: Int) = FontSize("${nr}pc")
+    fun pc(nr: Double) = FontSize("${nr}pc")
+    fun cm(nr: Int) = FontSize("${nr}cm")
+    fun cm(nr: Double) = FontSize("${nr}cm")
+  }
+
+}
+
+class FontStretch(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = FontStretch("normal")
+    val condensed = FontStretch("condensed")
+    val ultraCondensed = FontStretch("ultra-condensed")
+    val extraCondensed = FontStretch("extra-condensed")
+    val semiCondensed = FontStretch("semi-condensed")
+    val expanded = FontStretch("expanded")
+    val semiExpanded = FontStretch("semi-expanded")
+    val extraExpanded = FontStretch("extra-expanded")
+    val ultraExpanded = FontStretch("ultra-expanded")
+    val initial = FontWeight("initial")
+    val inherit = FontWeight("inherit")
+  }
+
+}
+
+class FontStyle(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = FontStyle("normal")
+    val italic = FontStyle("italic")
+    val oblique = FontStyle("oblique")
+    val initial = FontStyle("initial")
+    val inherit = FontStyle("inherit")
+  }
+
+}
+
+class FontWeight(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = FontWeight("normal")
+    val bold = FontWeight("bold")
+    val _100 = FontWeight("100")
+    val _200 = FontWeight("200")
+    val _300 = FontWeight("300")
+    val _400 = FontWeight("400")
+    val _500 = FontWeight("500")
+    val _600 = FontWeight("600")
+    val _700 = FontWeight("700")
+    val _800 = FontWeight("800")
+    val _900 = FontWeight("900")
+    val initial = FontWeight("initial")
+    val inherit = FontWeight("inherit")
+  }
+
+}
+
+class FontKerning(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = FontKerning("auto")
+    val normal = FontKerning("normal")
+    val none = FontKerning("none")
+  }
+
+}
+
+class FontSizeAdjust(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = FontSizeAdjust("none")
+    val initial = FontSizeAdjust("initial")
+    val inherit = FontSizeAdjust("inherit")
+  }
+
+}
+
+class FontVariant(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = FontVariant("normal")
+    val smallCaps = FontVariant("small-caps")
+    val initial = FontVariant("initial")
+    val inherit = FontVariant("inherit")
+  }
+
+}
+
+class FontVariantCaps(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = FontVariantCaps("normal")
+    val smallCaps = FontVariantCaps("small-caps")
+    val allSmallCaps = FontVariantCaps("all-small-caps")
+    val petiteCaps = FontVariantCaps("petite-caps")
+    val allPetiteCaps = FontVariantCaps("all-petite-caps")
+    val unicase = FontVariantCaps("unicase")
+    val initial = FontVariantCaps("initial")
+    val inherit = FontVariantCaps("inherit")
+    val unset = FontVariantCaps("unset")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Grid.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Grid.kt
@@ -0,0 +1,72 @@
+package nl.astraeus.css.properties
+
+
+class Grid(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = Grid("none")
+    val initial = Grid("initial")
+    val inherit = Grid("inherit")
+  }
+
+}
+
+class GridAuto(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = GridAuto("auto")
+    val maxContent = GridAuto("max-content")
+    val minContent = GridAuto("min-content")
+  }
+
+}
+
+class GridFlow(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val row = GridFlow("row")
+    val column = GridFlow("column")
+    val dense = GridFlow("dense")
+    val rowDense = GridFlow("row dense")
+    val columnDense = GridFlow("column dense")
+  }
+
+}
+
+class GridValue(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = GridValue("auto")
+
+    fun span(column: Int) = GridValue("span $column")
+    fun column(line: Int) = GridValue("$line")
+    fun row(line: Int) = GridValue("$line")
+  }
+
+}
+
+class TemplateRowColumn(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = GridValue("none")
+    val auto = GridValue("auto")
+    val maxContent = GridValue("max-content")
+    val minContent = GridValue("min-content")
+    val initial = GridValue("initial")
+    val inherit = GridValue("inherit")
+
+    fun length(length: Measurement) = GridValue(length.value)
+  }
+
+}
+
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Hyphens.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Hyphens.kt
@@ -0,0 +1,15 @@
+package nl.astraeus.css.properties
+
+class Hyphens(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = Hyphens("none")
+    val manual = Hyphens("manual")
+    val auto = Hyphens("auto")
+    val initial = Hyphens("initial")
+    val inherit = Hyphens("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Image.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Image.kt
@@ -0,0 +1,62 @@
+package nl.astraeus.css.properties
+
+class Image(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = Image("none")
+    val initial = Image("initial")
+    val inherit = Image("inherit")
+
+    fun url(url: String) = Image("url($url)")
+  }
+}
+
+class ImageRepeat(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val repeat = ImageRepeat("repeat")
+    val round = ImageRepeat("round")
+    val initial = ImageRepeat("initial")
+    val inherit = ImageRepeat("inherit")
+
+    fun stretch(url: String) = ImageRepeat("stretch")
+  }
+
+}
+
+class ImageSlice(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val repeat = ImageSlice("repeat")
+    val fill = ImageSlice("fill")
+    val initial = ImageSlice("initial")
+    val inherit = ImageSlice("inherit")
+
+    fun nr(nr: Int) = ImageSlice("$nr")
+    fun perc(perc: Int) = ImageSlice("$perc%")
+    fun perc(perc: Double) = ImageSlice("$perc%")
+    fun stretch(url: String) = ImageSlice("stretch")
+  }
+
+}
+
+class ImageSource(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = ImageSource("none")
+    val initial = ImageSource("initial")
+    val inherit = ImageSource("inherit")
+
+    fun text(txt: String) = ImageSource(txt)
+    fun image(url: String) = ImageSource("'$url'")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/InitialInherit.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/InitialInherit.kt
@@ -0,0 +1,12 @@
+package nl.astraeus.css.properties
+
+class InitialInherit(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val initial = InitialInherit("initial")
+    val inherit = InitialInherit("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Isolation.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Isolation.kt
@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class Isolation(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = Isolation("auto")
+    val isolate = Isolation("isolate")
+    val initial = Isolation("initial")
+    val inherit = Isolation("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/JustifyContent.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/JustifyContent.kt
@@ -0,0 +1,17 @@
+package nl.astraeus.css.properties
+
+class JustifyContent(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val flexStart = JustifyContent("flex-start")
+    val flexEnd = JustifyContent("flex-end")
+    val center = JustifyContent("center")
+    val spaceBetween = JustifyContent("space-between")
+    val spaceAround = JustifyContent("space-around")
+    val initial = JustifyContent("initial")
+    val inherit = JustifyContent("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/LetterSpacing.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/LetterSpacing.kt
@@ -0,0 +1,13 @@
+package nl.astraeus.css.properties
+
+class LetterSpacing(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = LetterSpacing("normal")
+    val initial = LetterSpacing("initial")
+    val inherit = LetterSpacing("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/ListStyle.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/ListStyle.kt
@@ -0,0 +1,48 @@
+package nl.astraeus.css.properties
+
+
+class ListStylePosition(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val inside = ListStylePosition("inside")
+    val outside = ListStylePosition("outside")
+    val initial = ListStylePosition("initial")
+    val inherit = ListStylePosition("inherit")
+  }
+
+}
+
+class ListStyleType(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val disc = ListStyleType("disc")
+    val armenian = ListStyleType("armenian")
+    val circle = ListStyleType("circle")
+    val cjkIdeographic = ListStyleType("cjk-ideographic")
+    val decimal = ListStyleType("decimal")
+    val decimalLeadingZero = ListStyleType("decimal-leading-zero")
+    val georgian = ListStyleType("georgian")
+    val hebrew = ListStyleType("hebrew")
+    val hiragana = ListStyleType("hiragana")
+    val hiraganaIroha = ListStyleType("hiragana-iroha")
+    val katakana = ListStyleType("katakana")
+    val katakanaIroha = ListStyleType("katakana-iroha")
+    val lowerAlpha = ListStyleType("lower-alpha")
+    val lowerGreek = ListStyleType("lower-greek")
+    val lowerLatin = ListStyleType("lower-latin")
+    val lowerRoman = ListStyleType("lower-roman")
+    val none = ListStyleType("none")
+    val square = ListStyleType("square")
+    val upperAlpha = ListStyleType("upper-alpha")
+    val upperGreek = ListStyleType("upper-greek")
+    val upperLatin = ListStyleType("upper-latin")
+    val upperRoman = ListStyleType("upper-roman")
+    val initial = ListStyleType("initial")
+    val inherit = ListStyleType("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Measurement.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Measurement.kt
@@ -0,0 +1,127 @@
+package nl.astraeus.css.properties
+
+enum class MeasurementUoM {
+  NONE,
+  PX,
+  EM,
+  REL,
+  REM,
+  PC,
+  PRC,
+  CM,
+  FR
+}
+
+open class Measurement(
+  value: String,
+  val uom: MeasurementUoM = MeasurementUoM.NONE
+) : CssProperty(value) {
+
+  override fun toString(): String = super.value
+
+  companion object {
+    val auto = Measurement("auto")
+    val initial = Measurement("initial")
+    val inherit = Measurement("inherit")
+    val normal = Measurement("normal")
+
+    fun fromString(value:String): Measurement = when {
+        value == "0" -> Measurement("0", MeasurementUoM.PX)
+        value.endsWith("px")  -> Measurement(value.slice(0..(value.length-2)), MeasurementUoM.PX)
+      value.endsWith("rel")  -> Measurement(value.slice(0..(value.length-3)), MeasurementUoM.REL)
+        else -> {
+          TODO("Unable to parse $value")
+        }
+      }
+
+    fun px(nr: Int) = if (nr == 0) {
+      Measurement(
+        "0",
+        MeasurementUoM.PX
+      )
+    } else {
+      Measurement(
+        "${nr}px",
+        MeasurementUoM.PX
+      )
+    }
+
+    fun px(nr: Double) = nr.px
+    fun em(nr: Int) = nr.em
+    fun em(nr: Double) = nr.em
+    fun prc(nr: Int) = nr.prc
+    fun prc(nr: Double) = nr.prc
+    fun pc(nr: Int) = nr.pc
+    fun pc(nr: Double) = nr.pc
+    fun cm(nr: Int) = nr.cm
+    fun cm(nr: Double) = nr.cm
+    fun fr(nr: Int) = nr.fr
+  }
+}
+
+val Int.px: Measurement
+  get() = Measurement(
+    "${this}${
+      if (this == 0) {
+        ""
+      } else {
+        "px"
+      }
+    }",
+    MeasurementUoM.PX
+  )
+val Int.em: Measurement
+  get() = Measurement(
+    "${this}${
+      if (this == 0) {
+        ""
+      } else {
+        "em"
+      }
+    }",
+    MeasurementUoM.EM
+  )
+val Int.rem: Measurement
+  get() = Measurement(
+    "${this}${
+      if (this == 0) {
+        ""
+      } else {
+        "rem"
+      }
+    }",
+    MeasurementUoM.REM
+  )
+val Int.prc: Measurement
+  get() = Measurement("${this}%", MeasurementUoM.PRC)
+val Int.pc: Measurement
+  get() = Measurement("${this}pc", MeasurementUoM.PC)
+val Int.cm: Measurement
+  get() = Measurement("${this}cm", MeasurementUoM.CM)
+val Int.fr: Measurement
+  get() = Measurement("${this}fr", MeasurementUoM.FR)
+
+fun Int.px(): Measurement = Measurement.px(this)
+
+val Double.px: Measurement
+  get() = Measurement("${this}px", MeasurementUoM.PX)
+val Double.em: Measurement
+  get() = Measurement("${this}em", MeasurementUoM.EM)
+val Double.rem: Measurement
+  get() = Measurement("${this}rem", MeasurementUoM.REM)
+val Double.prc: Measurement
+  get() = Measurement("${this}%", MeasurementUoM.PRC)
+val Double.pc: Measurement
+  get() = Measurement("${this}pc", MeasurementUoM.PC)
+val Double.cm: Measurement
+  get() = Measurement("${this}cm", MeasurementUoM.CM)
+
+fun Double.px(): Measurement = Measurement.px(this)
+
+open class LineHeight(value: String) : CssProperty(value) {
+  companion object {
+    val normal = LineHeight("normal")
+    val initial = LineHeight("initial")
+    val inherit = LineHeight("inherit")
+  }
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/MixBlendMode.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/MixBlendMode.kt
@@ -0,0 +1,25 @@
+package nl.astraeus.css.properties
+
+
+class MixBlendMode(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = MixBlendMode("normal")
+    val multiply = MixBlendMode("multiply")
+    val screen = MixBlendMode("screen")
+    val overlay = MixBlendMode("overlay")
+    val darken = MixBlendMode("darken")
+    val lighten = MixBlendMode("lighten")
+    val colorDodge = MixBlendMode("color-dodge")
+    val colorBurn = MixBlendMode("color-burn")
+    val difference = MixBlendMode("difference")
+    val exclusion = MixBlendMode("exclusion")
+    val hue = MixBlendMode("hue")
+    val saturation = MixBlendMode("saturation")
+    val color = MixBlendMode("color")
+    val luminosity = MixBlendMode("luminosity")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/ObjectFit.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/ObjectFit.kt
@@ -0,0 +1,17 @@
+package nl.astraeus.css.properties
+
+class ObjectFit(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val fill = ObjectFit("fill")
+    val contain = ObjectFit("contain")
+    val cover = ObjectFit("cover")
+    val scaleDown = ObjectFit("scale-down")
+    val none = ObjectFit("none")
+    val initial = ObjectFit("initial")
+    val inherit = ObjectFit("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/OutlineWidth.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/OutlineWidth.kt
@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class OutlineWidth(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val thin = OutlineWidth("thin")
+    val medium = OutlineWidth("medium")
+    val thick = OutlineWidth("thick")
+    val initial = BorderWidth("initial")
+    val inherit = BorderWidth("inherit")
+  }
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Overflow.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Overflow.kt
@@ -0,0 +1,15 @@
+package nl.astraeus.css.properties
+
+class Overflow(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val visible = Overflow("visible")
+    val hidden = Overflow("hidden")
+    val scroll = Overflow("scroll")
+    val auto = Overflow("auto")
+    val initial = BorderWidth("initial")
+    val inherit = BorderWidth("inherit")
+  }
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/PageBreak.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/PageBreak.kt
@@ -0,0 +1,17 @@
+package nl.astraeus.css.properties
+
+class PageBreak(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = PageBreak("auto")
+    val always = PageBreak("always")
+    val avoid = PageBreak("avoid")
+    val left = PageBreak("left")
+    val right = PageBreak("right")
+    val initial = PageBreak("initial")
+    val inherit = PageBreak("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Perspective.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Perspective.kt
@@ -0,0 +1,13 @@
+package nl.astraeus.css.properties
+
+class Perspective(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = Perspective("none")
+    val initial = Perspective("initial")
+    val inherit = Perspective("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/PointerEvents.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/PointerEvents.kt
@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class PointerEvents(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = PointerEvents("auto")
+    val none = PointerEvents("none")
+    val initial = PointerEvents("initial")
+    val inherit = PointerEvents("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Position.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Position.kt
@@ -0,0 +1,17 @@
+package nl.astraeus.css.properties
+
+class Position(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val static = Position("static")
+    val absolute = Position("absolute")
+    val fixed = Position("fixed")
+    val relative = Position("relative")
+    val sticky = Position("sticky")
+    val initial = Position("initial")
+    val inherit = Position("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Punctuation.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Punctuation.kt
@@ -0,0 +1,17 @@
+package nl.astraeus.css.properties
+
+class HangingPunctuation(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = HangingPunctuation("none")
+    val first = HangingPunctuation("first")
+    val last = HangingPunctuation("last")
+    val allowEnd = HangingPunctuation("allow-end")
+    val forceEnd = HangingPunctuation("force-end")
+    val initial = HangingPunctuation("initial")
+    val inherit = HangingPunctuation("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Resize.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Resize.kt
@@ -0,0 +1,16 @@
+package nl.astraeus.css.properties
+
+class Resize(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = Resize("none")
+    val both = Resize("both")
+    val horizontal = Resize("horizontal")
+    val vertical = Resize("vertical")
+    val initial = Resize("initial")
+    val inherit = Resize("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/ScrollBehavior.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/ScrollBehavior.kt
@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class ScrollBehavior(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = ScrollBehavior("auto")
+    val smooth = ScrollBehavior("smooth")
+    val initial = ScrollBehavior("initial")
+    val inherit = ScrollBehavior("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Span.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Span.kt
@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class Span(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = Clip("none")
+    val all = Clip("all")
+    val initial = Clip("initial")
+    val inherit = Clip("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/TableLayout.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/TableLayout.kt
@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class TableLayout(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = TableLayout("auto")
+    val fixed = TableLayout("fixed")
+    val initial = TableLayout("initial")
+    val inherit = TableLayout("auto")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/TextAlign.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/TextAlign.kt
@@ -0,0 +1,16 @@
+package nl.astraeus.css.properties
+
+class TextAlign(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val left = TextAlign("left")
+    val right = TextAlign("right")
+    val center = TextAlign("center")
+    val justify = TextAlign("justify")
+    val initial = TextAlign("initial")
+    val inherit = TextAlign("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/TextAlignLast.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/TextAlignLast.kt
@@ -0,0 +1,19 @@
+package nl.astraeus.css.properties
+
+class TextAlignLast(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = TextAlignLast("auto")
+    val left = TextAlignLast("left")
+    val right = TextAlignLast("right")
+    val center = TextAlignLast("center")
+    val justify = TextAlignLast("justify")
+    val start = TextAlignLast("start")
+    val end = TextAlignLast("end")
+    val initial = TextAlignLast("initial")
+    val inherit = TextAlignLast("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/TextDecorationLine.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/TextDecorationLine.kt
@@ -0,0 +1,16 @@
+package nl.astraeus.css.properties
+
+class TextDecorationLine(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = TextDecorationLine("none")
+    val underline = TextDecorationLine("underline")
+    val overline = TextDecorationLine("overline")
+    val lineThrough = TextDecorationLine("line-through")
+    val initial = TextDecorationLine("initial")
+    val inherit = TextDecorationLine("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/TextDecorationStyle.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/TextDecorationStyle.kt
@@ -0,0 +1,17 @@
+package nl.astraeus.css.properties
+
+class TextDecorationStyle(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val solid = TextDecorationStyle("solid")
+    val double = TextDecorationStyle("double")
+    val dotted = TextDecorationStyle("dotted")
+    val dashed = TextDecorationStyle("dashed")
+    val wavy = TextDecorationStyle("wavy")
+    val initial = TextDecorationStyle("initial")
+    val inherit = TextDecorationStyle("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/TextJustify.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/TextJustify.kt
@@ -0,0 +1,16 @@
+package nl.astraeus.css.properties
+
+class TextJustify(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = TextJustify("auto")
+    val interWord = TextJustify("inter-word")
+    val interCharacter = TextJustify("inter-character")
+    val none = TextJustify("none")
+    val initial = TextJustify("initial")
+    val inherit = TextJustify("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/TextTransform.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/TextTransform.kt
@@ -0,0 +1,16 @@
+package nl.astraeus.css.properties
+
+class TextTransform(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = TextTransform("none")
+    val capitalize = TextTransform("capitalize")
+    val uppercase = TextTransform("uppercase")
+    val lowercase = TextTransform("lowercase")
+    val initial = TextTransform("initial")
+    val inherit = TextTransform("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/TimingFunction.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/TimingFunction.kt
@@ -0,0 +1,31 @@
+package nl.astraeus.css.properties
+
+class TimingFunction(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val linear = TimingFunction("linear")
+    val ease = TimingFunction("ease")
+    val easeIn = TimingFunction("ease-in")
+    val easeOut = TimingFunction("ease-out")
+    val easeInOut = TimingFunction("ease-in-out")
+    val stepStart = TimingFunction("step-start")
+    val stepEnd = TimingFunction("step-end")
+    val initial = TimingFunction("initial")
+    val inherit = TimingFunction("inherit")
+
+    fun steps(steps: Int, start: Boolean) = TimingFunction(
+      "steps($steps, ${
+        if (start) {
+          "start"
+        } else {
+          "end"
+        }
+      }"
+    )
+
+    fun cubicBezier(n1: Double, n2: Double, n3: Double, n4: Double) = TimingFunction("cubic-bezier($n1, $n2, $n3, $n4)")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Transform.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Transform.kt
@@ -0,0 +1,51 @@
+package nl.astraeus.css.properties
+
+class Transform(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val none = Transform("none")
+    val initial = Transform("initial")
+    val inherit = Transform("inherit")
+
+    fun matrix(
+      n1: Double,
+      n2: Double,
+      n3: Double,
+      n4: Double,
+      n5: Double,
+      n6: Double
+    ) = Transform("matrix($n1, $n2, $n3, $n4, $n5, $n6)")
+
+    fun matrix3d(
+      n01: Double, n02: Double, n03: Double, n04: Double,
+      n05: Double, n06: Double, n07: Double, n08: Double,
+      n09: Double, n10: Double, n11: Double, n12: Double,
+      n13: Double, n14: Double, n15: Double, n16: Double
+    ) = Transform(
+      "matrix3d($n01, $n02, $n03, $n04, $n05, $n06, $n07, $n08, $n09, $n10, $n11, $n12, $n13, $n14, $n15, $n16)"
+    )
+
+    fun translate(x: Double, y: Double) = Transform("translate($x, $y)")
+    fun translate3d(x: Double, y: Double, z: Double) = Transform("translate3d($x, $y, $z)")
+    fun translateX(x: Double) = Transform("translateX($x)")
+    fun translateY(y: Double) = Transform("translateY($y)")
+    fun translateZ(z: Double) = Transform("translateZ($z)")
+    fun scale(x: Double, y: Double) = Transform("scale($x, $y)")
+    fun scale3d(x: Double, y: Double, z: Double) = Transform("scale3d($x, $y, $z)")
+    fun scaleX(x: Double) = Transform("scaleX($x)")
+    fun scaleY(y: Double) = Transform("scaleY($y)")
+    fun scaleZ(z: Double) = Transform("scaleZ($z)")
+    fun rotate(angle: Double) = Transform("rotate($angle)")
+    fun rotate3d(x: Double, y: Double, z: Double, angle: Double) = Transform("scale3d($x, $y, $z, $angle")
+    fun rotateX(x: Double) = Transform("rotateX($x)")
+    fun rotateY(y: Double) = Transform("rotateY($y)")
+    fun rotateZ(z: Double) = Transform("rotateZ($z)")
+    fun skew(x: Double, y: Double) = Transform("skew($x, $y)")
+    fun skewX(x: Double) = Transform("skew($x)")
+    fun skewY(y: Double) = Transform("skew($y)")
+    fun perspective(length: Measurement) = Transform("perspective(${length.css()})")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/TransformStyle.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/TransformStyle.kt
@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class TransformStyle(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val flat = TransformStyle("flat")
+    val preserve3d = TransformStyle("preserve-3d")
+    val initial = TransformStyle("initial")
+    val inherit = TransformStyle("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/UnicodeBidi.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/UnicodeBidi.kt
@@ -0,0 +1,15 @@
+package nl.astraeus.css.properties
+
+class UnicodeBidi(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = UnicodeBidi("normal")
+    val embed = UnicodeBidi("embed")
+    val bidiOverride = UnicodeBidi("bidi-override")
+    val initial = UnicodeBidi("initial")
+    val inherit = UnicodeBidi("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/UserSelect.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/UserSelect.kt
@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class UserSelect(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = UserSelect("auto")
+    val none = UserSelect("none")
+    val text = UserSelect("text")
+    val all = UserSelect("all")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/VerticalAlign.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/VerticalAlign.kt
@@ -0,0 +1,20 @@
+package nl.astraeus.css.properties
+
+class VerticalAlign(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val baseline = VerticalAlign("baseline")
+    val sub = VerticalAlign("sub")
+    val _super = VerticalAlign("super")
+    val top = VerticalAlign("top")
+    val textTop = VerticalAlign("text-top")
+    val middle = VerticalAlign("middle")
+    val bottom = VerticalAlign("bottom")
+    val textBottom = VerticalAlign("text-bottom")
+    val initial = VerticalAlign("initial")
+    val inherit = VerticalAlign("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/Visibility.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/Visibility.kt
@@ -0,0 +1,15 @@
+package nl.astraeus.css.properties
+
+class Visibility(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val visible = Visibility("visible")
+    val hidden = Visibility("hidden")
+    val collapse = Visibility("collapse")
+    val initial = Visibility("initial")
+    val inherit = Visibility("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/WhiteSpace.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/WhiteSpace.kt
@@ -0,0 +1,17 @@
+package nl.astraeus.css.properties
+
+class WhiteSpace(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = WhiteSpace("normal")
+    val nowrap = WhiteSpace("nowrap")
+    val pre = WhiteSpace("pre")
+    val preLine = WhiteSpace("pre-line")
+    val preWrap = WhiteSpace("pre-wrap")
+    val initial = WhiteSpace("initial")
+    val inherit = WhiteSpace("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/WordBreak.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/WordBreak.kt
@@ -0,0 +1,16 @@
+package nl.astraeus.css.properties
+
+class WordBreak(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = WordBreak("normal")
+    val breakAll = WordBreak("break-all")
+    val keepAll = WordBreak("keep-all")
+    val breakWord = WordBreak("break-word")
+    val initial = WordBreak("initial")
+    val inherit = WordBreak("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/WordSpacing.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/WordSpacing.kt
@@ -0,0 +1,13 @@
+package nl.astraeus.css.properties
+
+class WordSpacing(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = WordSpacing("normal")
+    val initial = WordSpacing("initial")
+    val inherit = WordSpacing("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/WordWrap.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/WordWrap.kt
@@ -0,0 +1,14 @@
+package nl.astraeus.css.properties
+
+class WordWrap(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val normal = WordWrap("normal")
+    val breakWord = WordWrap("break-word")
+    val initial = WordWrap("initial")
+    val inherit = WordWrap("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/WritingMode.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/WritingMode.kt
@@ -0,0 +1,13 @@
+package nl.astraeus.css.properties
+
+class WritingMode(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val horizontalTb = WritingMode("horizontal-tb")
+    val verticalRl = WritingMode("vertical-rl")
+    val verticalLr = WritingMode("vertical-lr")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/properties/ZIndex.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/properties/ZIndex.kt
@@ -0,0 +1,13 @@
+package nl.astraeus.css.properties
+
+class ZIndex(
+  value: String
+) : CssProperty(value) {
+
+  companion object {
+    val auto = ZIndex("auto")
+    val initial = ZIndex("initial")
+    val inherit = ZIndex("inherit")
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/style/CssBlock.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/style/CssBlock.kt
@@ -0,0 +1,6 @@
+package nl.astraeus.css.style
+
+data class CssBlock(
+  val selector: String,
+  val content: String
+)
--- a/src/commonMain/kotlin/nl/astraeus/css/style/CssFunctions.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/style/CssFunctions.kt
@@ -0,0 +1,11 @@
+package nl.astraeus.css.style
+
+import nl.astraeus.css.properties.Color
+
+object CssFunctions {
+
+  fun darken(color: Color, percentage: Int): Color {
+    return color
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/style/FontFace.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/style/FontFace.kt
@@ -0,0 +1,42 @@
+package nl.astraeus.css.style
+
+import nl.astraeus.css.properties.CssProperty
+import nl.astraeus.css.properties.FontSize
+import nl.astraeus.css.properties.FontStretch
+import nl.astraeus.css.properties.FontStyle
+import nl.astraeus.css.properties.FontWeight
+
+@CssTagMarker
+open class FontFace : CssGenerator() {
+
+  override fun getValidator(name: String) = null
+
+  fun fontFamily(font: String) {
+    props["font-family"] = listOf(CssProperty(font))
+  }
+
+  fun fontSize(size: FontSize) {
+    props["font-size"] = listOf(size)
+  }
+
+  fun src(src: String) {
+    props["src"] = listOf(CssProperty(src))
+  }
+
+  fun fontStretch(stretch: FontStretch) {
+    props["font-stretch"] = listOf(stretch)
+  }
+
+  fun fontStyle(style: FontStyle) {
+    props["font-style"] = listOf(style)
+  }
+
+  fun fontWeight(weight: FontWeight) {
+    props["font-weight"] = listOf(weight)
+  }
+
+  fun unicodeRange(unicodeRange: String) {
+    props["unicode-range"] = listOf(CssProperty(unicodeRange))
+  }
+
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/style/KeyFrames.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/style/KeyFrames.kt
@@ -0,0 +1,16 @@
+package nl.astraeus.css.style
+
+@CssTagMarker
+open class KeyFrames : CssGenerator() {
+  val frames: MutableMap<Int, Css> = mutableMapOf()
+
+  override fun getValidator(name: String): List<Validator>? = listOf()
+
+  fun percentage(percentage: Int, style: Css) {
+    val css = Style()
+
+    style(css)
+
+    frames[percentage] = style
+  }
+}
--- a/src/commonMain/kotlin/nl/astraeus/css/style/Style.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/style/Style.kt
--- a/src/commonMain/kotlin/nl/astraeus/css/style/Validator.kt
+++ b/src/commonMain/kotlin/nl/astraeus/css/style/Validator.kt
@@ -0,0 +1,37 @@
+package nl.astraeus.css.style
+
+import nl.astraeus.css.properties.CssProperty
+
+abstract class Validator {
+
+  open fun validate(properties: List<CssProperty>): Boolean = true
+
+  open fun getMessage(name: String): String = "'$name' validation message not defined for $this"
+
+}
+
+class MaxCountValidator(
+  val number: Int
+) : Validator() {
+
+  override fun validate(property: List<CssProperty>): Boolean = property.size <= number
+
+  override fun getMessage(name: String): String = "'$name' should not have more than 4 entries"
+
+}
+
+class InitialInheritSingleValue : Validator() {
+
+  override fun validate(properties: List<CssProperty>): Boolean {
+    for (prop in properties) {
+      if (prop.css() == "initial" || prop.css() == "inherit") {
+        return properties.size == 1
+      }
+    }
+
+    return true
+  }
+
+  override fun getMessage(name: String): String = "'$name' can only have single value when 'initial' or 'inherit'"
+
+}
--- a/src/commonTest/kotlin/nl/astraeus/css/CssNameExample.kt
+++ b/src/commonTest/kotlin/nl/astraeus/css/CssNameExample.kt
@@ -0,0 +1,43 @@
+package nl.astraeus.css
+
+import nl.astraeus.css.properties.Color
+import nl.astraeus.css.style.DescriptionProvider
+import kotlin.test.Test
+
+private val CAPITAL_LETTER by lazy { Regex("[A-Z]") }
+
+fun String.hyphenize(): String =
+  replace(CAPITAL_LETTER) {
+    "-${it.value.lowercase()}"
+  }
+
+open class CssName(name: String? = null) : DescriptionProvider {
+  val name: String = if (name != null) {
+    "css-$name"
+  } else{
+    "css${this::class.simpleName?.hyphenize() ?: this::class}"
+  }
+
+  override fun description() = name
+}
+
+object MainTitle : CssName()
+object SectionTitle : CssName("sct-title")
+
+class CssNameExample {
+
+  @Test
+  fun testCssName() {
+    val css = style {
+      select(MainTitle) {
+        color(Color.white)
+      }
+
+      select(SectionTitle) {
+        color(Color.red)
+      }
+    }
+
+    println(css.generateCss())
+  }
+}
--- a/src/commonTest/kotlin/nl/astraeus/css/Examples.kt
+++ b/src/commonTest/kotlin/nl/astraeus/css/Examples.kt
@@ -0,0 +1,131 @@
+package nl.astraeus.css
+
+import nl.astraeus.css.properties.BorderStyle
+import nl.astraeus.css.properties.Color
+import nl.astraeus.css.properties.Measurement
+import nl.astraeus.css.properties.em
+import nl.astraeus.css.properties.hsla
+import nl.astraeus.css.properties.prc
+import nl.astraeus.css.properties.px
+import nl.astraeus.css.style.Style
+import nl.astraeus.css.style.cls
+import nl.astraeus.css.style.txt
+import kotlin.test.Test
+
+class Examples {
+
+  @Test
+  fun testColor() {
+    val color = hsla(0, 50, 50, 1.0)
+    val backgroundColor = Color.white
+
+    val css = style {
+      select(cls("button")) {
+        padding(5.px)
+
+        select("a") {
+          color(color)
+          backgroundColor(backgroundColor)
+
+          hover {
+            color(color.lighten(10))
+            backgroundColor(backgroundColor.darken(10))
+          }
+        }
+      }
+    }
+
+    println(css.generateCss(minified = true))
+  }
+
+  @Test
+  fun testMixins() {
+    fun Style.borderStyles(borderWidth: Measurement = 2.px) {
+      borderWidth(borderWidth)
+      borderColor(Color.aquamarine)
+      borderStyle(BorderStyle.solid)
+    }
+
+    val css = style {
+      select(txt("a"), cls("button")) {
+        borderStyles()
+
+        color(Color.white)
+      }
+
+      select(cls("btn-primary")) {
+        borderStyles(3.px)
+        color(Color.blue)
+      }
+    }
+
+    println(css.generateCss())
+  }
+
+  @Test
+  fun testMeasurements() {
+    val css = style {
+      select("body") {
+        fontSize(1.2.em)
+        borderWidth(3.px)
+        width(75.prc)
+      }
+    }
+
+    println(css.generateCss())
+  }
+
+  @Test
+  fun testGeneration() {
+    val color = hsla(0, 50, 50, 1.0)
+    val backgroundColor = Color.white
+
+    val css = style {
+      select(cls("button")) {
+        padding(5.px)
+
+        select("a", "span") {
+          color(color)
+          backgroundColor(backgroundColor)
+
+          hover {
+            color(color.lighten(10))
+            backgroundColor(backgroundColor.darken(10))
+          }
+        }
+      }
+    }
+
+    println(css.generateCss(
+      minified = false,
+      sortProperties = true,
+      combineEqualBlocks = false
+    ))
+  }
+
+  @Test
+  fun testMediaQueries() {
+    val css = style {
+      media("screen and (min-width: 30em)") {
+        select("html", "body") {
+          backgroundColor(Color.purple)
+          color(Color.blue)
+        }
+      }
+
+      media("print") {
+        select("html", "body") {
+          backgroundColor(Color.white)
+          color(Color.darkGrey)
+        }
+      }
+
+    }
+
+    println(css.generateCss(
+      minified = false,
+      sortProperties = true,
+      combineEqualBlocks = true
+    ))
+  }
+}
--- a/src/commonTest/kotlin/nl/astraeus/css/TestCssBuilder.kt
+++ b/src/commonTest/kotlin/nl/astraeus/css/TestCssBuilder.kt
@@ -0,0 +1,268 @@
+package nl.astraeus.css
+
+import nl.astraeus.css.properties.BoxSizing
+import nl.astraeus.css.properties.Color
+import nl.astraeus.css.properties.Count
+import nl.astraeus.css.properties.Display
+import nl.astraeus.css.properties.em
+import nl.astraeus.css.properties.hsl
+import nl.astraeus.css.properties.hsla
+import nl.astraeus.css.properties.px
+import nl.astraeus.css.properties.rgb
+import nl.astraeus.css.properties.rgba
+import nl.astraeus.css.style.attr
+import nl.astraeus.css.style.attrEquals
+import nl.astraeus.css.style.cls
+import nl.astraeus.css.style.id
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
+
+class TestCssBuilder {
+
+  @Test
+  fun testBuilder() {
+    val css = style {
+
+      select("*", "*::before", "*::after") {
+        boxSizing(BoxSizing.borderBox)
+      }
+
+      select("html") {
+        transition("background-color 1s ease")
+
+        margin(0.px)
+        padding(0.px)
+
+        focus {
+          backgroundColor(Color.blue)
+        }
+      }
+
+      select("body") {
+        margin(0.px)
+
+        padding(0.px)
+
+        focus {
+          backgroundColor(Color.blue)
+        }
+        transition("background-color 1s ease")
+      }
+
+      select(".test") {
+        top(10.px)
+        left(4.em)
+        backgroundColor(rgba(255, 255, 255, 0.75))
+        animationIterationMode(
+          Count.auto,
+          Count.auto,
+          Count.auto,
+          Count.auto,
+          Count.auto
+        )
+
+        child("li") {
+          color(hsl(200, 50, 50))
+        }
+
+        select("> a") {
+          color(hsl(200, 50, 50))
+        }
+
+        hover {
+          color(Color.red)
+        }
+
+        child("li") {
+          listStyle("none")
+
+          child("ul") {
+            opacity(0.0)
+            display(Display.none)
+            paddingLeft(20.px)
+            child("li") {
+              listStyle("none")
+
+              child("ul") {
+                paddingLeft(30.px)
+                child("li") {
+                  listStyle("none")
+                }
+              }
+            }
+          }
+
+          hover {
+            child("ul") {
+              opacity(1.0)
+              display(Display.block)
+            }
+          }
+        }
+      }
+    }
+
+    println(css.generateCss(combineEqualBlocks = true, sortProperties = true))
+  }
+
+  @Test
+  fun testClass() {
+    val css2 = style {
+      select(id("my-label")) {
+        color(Color.antiqueWhite)
+      }
+
+      select(cls("my-label")) {
+        color(Color.aliceBlue)
+      }
+
+      // tr.even {}
+      select("tr") {
+        and(cls("even")) {
+          color(Color.gray)
+        }
+
+/*
+        nthChild(2) {
+
+        }
+*/
+
+        // not(bla) {
+        not(cls("bla")) {
+          color(Color.blue)
+        }
+
+      }
+
+      // table .even {}
+      select("tr") {
+        select(cls("even")) {
+          color(Color.green)
+        }
+
+        // [type]
+        select(attr("type")) {
+
+        }
+
+        // [type="checkbox"]
+        select(attrEquals("type", "checkbox")) {
+
+        }
+
+        // table > .odd
+        child(cls("odd")) {
+
+        }
+
+        //adjSibling()
+      }
+
+      select(cls("button")) {
+        fontSize(12.px)
+        color(hsl(200, 50, 50))
+
+        // .button:hover
+        hover {
+          color(hsl(200, 40, 40))
+        }
+
+        child(".green") {
+          color(Color.green)
+        }
+
+        sibling(".red") {
+          color(Color.red)
+        }
+
+        adjSibling(".blue") {
+          color(Color.blue)
+        }
+      }
+    }
+
+    println(css2.generateCss())
+  }
+
+
+  @Test
+  fun testOr() {
+    val css = style {
+      select("h1") {
+        color(Color.blue)
+
+        select("table") {
+          color(Color.red)
+
+          select("th", "td") {
+            color(Color.green)
+          }
+        }
+      }
+    }
+
+    println(css.generateCss())
+  }
+
+  @Test
+  fun testOrWithComma() {
+    var excepted = false
+    try {
+      val css = style {
+        select("h1") {
+          color(Color.blue)
+
+          select("table") {
+            color(Color.red)
+
+            select("th, td") {
+              color(Color.green)
+            }
+          }
+        }
+      }
+
+      println(css.generateCss())
+    } catch (e: Exception) {
+      excepted = true
+      assertTrue {
+        e is IllegalStateException
+      }
+      assertTrue {
+        e.message?.contains("Comma is not allowed in selector") ?: false
+      }
+    }
+    assertTrue {
+      excepted
+    }
+  }
+
+  @Test
+  fun testAlphaFunctions() {
+    val hsl = hsl(1, 50, 50)
+    val hsla = hsla(1, 50, 50, 0.5)
+    val rgb = rgb(101, 111, 121)
+    val rgba = rgba(100, 110, 120, 0.4)
+    val hex = Color("#88ff44")
+    val hexa = Color("#88ff4466")
+
+    assertFalse { hsl.hasAlpha() }
+    assertFalse { rgb.hasAlpha() }
+    assertFalse { hex.hasAlpha() }
+
+    assertTrue { hsla.hasAlpha() }
+    assertTrue { rgba.hasAlpha() }
+    assertTrue { hexa.hasAlpha() }
+
+    assertEquals(0.5, hsla.getAlpha())
+    assertEquals(0.4, rgba.getAlpha())
+    assertEquals(0.5, hsla.getAlpha())
+    assertEquals(0.4, hexa.getAlpha())
+    assertEquals("646e78", rgba.toHex())
+    assertEquals("bf4240", hsla.toHex())
+  }
+
+}