@import url('https://fonts.googleapis.com/css?family=Fira+Sans&subset=cyrillic,cyrillic-ext,greek,greek-ext,latin-ext,vietnamese');
@import url('https://fonts.googleapis.com/css?family=Alfa+Slab+One&subset=latin-ext,vietnamese');

body {
    display: grid;
    grid-template-areas:
        'ribbon ribbon'
        'sidebar content';
    background-color: #3498db;
}

a {
    text-decoration: none;
    color: #2c3e50;
    text-decoration: none;
    font-style: italic;
    border-bottom: 5px solid #2c3e50;
    transition: color 0.2s, border-bottom-color 0.2s;
}


a:hover {
    color: #8e44ad;
    border-bottom-color: #8e44ad;
    transition: color 0.4s, border-bottom-color 0.4s;
}

h1,
h2 {
    margin: 0;
    padding: 0 20px;
}

.sidebar,
.content {
    padding: 10px;
    background-color: #bdc3c7;
    color: black;
}

.center {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

/* ribbon ********************************************************************/

.ribbon {
    grid-area: ribbon;
    padding: 0;
    margin: 0;
    background-color: #2c3e50;
}

.ribbon,
.ribbon a {
    color: #ecf0f1;
}

.ribbon-links {
    display: table;
    list-style-type: none;
    margin: 0;
    padding: 0;
    background-color: #7f8c8d;
    width: 100%;
    white-space: nowrap;
}

.ribbon-links li {
    display: table-cell;
    float: left;
    padding: 5px 20px;
    background-color: #7f8c8d;
}

.ribbon li:hover {
    background-color: #34495e
}

/* sidebar *******************************************************************/

.sidebar {
    grid-area: sidebar;
    margin: 10px 5px 10px 10px;
    width: 300px;
}

.side-picture {
    margin: 10px auto;
}

.side-card {
    margin: 10px;
    background-color: #ecf0f1;
}

.side-card h4,
.side-content {
    padding: 10px 1em;
    margin: 0;
}

p.side-content {
    padding: 0.5em 1em;
}

.side-links {
    line-height: 1.5em;
}

/* content *******************************************************************/

.content {
    grid-area: content;
    margin: 10px 10px 10px 5px;
}

.card {
    background-color: #ecf0f1;
    padding: 10px;
    margin: 40px 10px;
    box-shadow: 3px 3px 6px rgba(0, 0, 0, 0.7);
    transition: box-shadow 0.2s;
}

.card:hover {
    box-shadow: 8px 8px 15px rgba(0, 0, 0, 0.7);
    transition: box-shadow 0.3s;
}

.card-lvl2 {
    margin: 10px 10px 20px 20px;
    padding-left: 0;
    background-color: #bdc3c7;
}

.list-lvl1,
.list-lvl1 a {
    background-color: #bdc3c7;
    list-style: none;
}

.list-lvl1 {
    padding: 10px;
}

.list-lvl1 h4 {
    margin-block-start: 0.5em;
    margin-block-end: 1em;
}

.two-col-ul {
    collumns: 2;
    -webkit-columns: 2;
    -moz-columns: 2;
}

/* highlights ****************************************************************/
h1,h2,h3,h4,h5 {
    font-family: 'Alfa Slab One', serif;
    font-weight: 300;
    margin: 0;
    z-index: 20;
    position: relative;
}

h1 {
    font-size: 4em;
}

h2 {
    font-size: 3em;
}

h3 {
    font-size: 2em;
}

h4 {
    font-size: 1.2em;
}

.header-container {
    display: inline-block;
}

.highlight-h1, .highlight-h2, .highlight-h3, .highlight-h4, .highlight-h5 {
    position: relative;
    left: -10px;
    width: 120%;
    max-width: 90vw;
    z-index: 10;
}

.highlight-h1 {
    background-color: #1abc9c !important;
    height: 48px;
    top: -48px;
}

.highlight-h2 {
    background-color: #f1c40f !important;
    height: 34px;
    top: -34px;
}

.highlight-h3 {
    background-color: #2ecc71 !important;
    height: 24px;
    top: -24px;
}

.highlight-h4 {
    background-color: #e67e22 !important;
    height: 24px;
    top: -26px;
    left: 0;
    width: 110%;
}

.list-lvl1 .highlight-h4 {
    background-color: #e67e22 !important;
    height: 24px;
    top: -34px;
    left: 0;
    left: -10px;
    width: 120%;
}

.highlight-h5 {
    background-color: #9b59b6 !important;
    height: 12px;
    top: -12px;
}