    /*
     * SCSS Syntax Highlight Sample File (Standard)
     *
     * This file contains most SCSS syntax, CSS3 properties, advanced code structure.
     * It is NOT a valid SCSS file that can be compiled by SCSS preprocessors.
     *
     * @author  Guo Yunhe guoyunhebrave@gmail.com
     * @date    2016-09-15
     */

    /*
     * Block comment
     *
     * Alert keywords:
     * TODO BUG FIXME
     */

    @charset "UTF-8";

    @import "mixins/button";

    // Variable define

    $image-path:            "../../static/images";
    $default-text-color:    #333 !default; // Default can be overrided
    $default-font-size:     16px !default;
    $default-font-family:   Roboto, "Droid Sans", sans-serif;
    $default-font-weight:   400;
    $default-line-height:   $default-font-size * 1.8;
    $shadow-transparence:   0.25;
    $box-shadow:            0 0 3px rgba(0,0,0,$shadow-transparence);
    $page-width:            100rem; // kabab-case
    $gapOfArticle:          20px;   // camelCase
    $body_background_color: white;  // snake_case

    // Mixins

    @mixin border-radius($radius) {
      -webkit-border-radius: $radius;
         -moz-border-radius: $radius;
          -ms-border-radius: $radius;
              border-radius: $radius;
    }

    .box { @include border-radius(10px); }

    // Nesting

    #home-page {

        header {
            width: 80%;
            margin: 0 auto;

            .cover {
                @include border-radius(20px);
                max-width: 100%;

                &:hover {
                    background: #ffffff;
                }

                .like-button {
                    font-size: $default-font-size * 0.8;

                    @media (max-width: 300px) and (min-width: 200px) {
                        font-size: $default-font-size * 0.8;

                        .icon {
                            width: 20px;
                            height: 20px;
                        }
                    }

                    @media print {
                        display: none;
                    }
                }
            }
        }
    }

    // Extend and inheritance

    .message {
        border: $border-light;
        background-color: #f0f0f0;
    }

    .message-danger {
        @extend .message;
    }

    // Control structures

    @mixin does-parent-exist {
        @if & {
            &:hover {
                color: red;
            }
        } @else {
            a {
                color: red;
            }
        }
    }

    // Operators

    .container { width: 100%; }

    article[role="main"] {
      float: left;
      width: 600px / 960px * 100%;
    }

    aside[role="complementary"] {
      float: right;
      width: 300px / 960px * 100%;
    }

    // Functions - see http://sass-lang.com/documentation/Sass/Script/Functions.html

    $color1: hsl(120deg, 100%, 50%);
    $color2: rgb($red, $green, blue($color1));
    $color3: mix($color1, $color2, [$weight]);

    // Properties

    html, body {
        font-family: "Droid Sans", Arial, sans-serif;
        font-size: 11pt;
        line-height: 1.5em;
        max-width: 300px + $page-width - $gap / 2;
        background: $bg_color;
        text-shadow: 0 0 2px rgba(0,0,0, $transparence);
        box-sizing: border-box;
    }

    // Selectors

    blockquote {
        margin: 0;
    }

    header #logo {
        width: 100px;
    }

    div#footer .link {
        color: blue;
    }

    sidebar #subscribe .subscribe_form input[type="text"] {
        font-size: 20px;
    }

    sidebar #subscribe .subscribe_form:nth-child(2n + 1):hover input[class*="small-"] {
        font-weight: bold;
    }

    // Media Queries

    @media print {
        .container {
            width: 100%;
        }
    }

    @media screen and (min-width: 768px) {
        .container {
            width: 600px;
        }
    }

    @media screen and (min-width: 768px) and (max-width: 960px) {
        .container {
            width: 720px;
        }
    }

    // Fontface

    @font-face {
        font-family: MyHelvetica;
        src: local("Helvetica Neue Bold"),
            local("HelveticaNeue-Bold"),
            url(MgOpenModernaBold.ttf);
        font-weight: bold;
    }

    // Animation (Keyframes)

    @keyframes slidein {
        from {
            margin-left: 100%;
            width: 300%;
        }

        to {
            margin-left: 0%;
            width: 100%;
        }
    }