@font-face {
    font-family: "Helvetica";
    src: url("./fonts/HelveticaNeue-Normal.eot");
    src: 
    url("./fonts/HelveticaNeue-Normal.ttf") format("truetype"),
    url("./fonts/HelveticaNeue-Normal.woff") format("woff"),
    url("./fonts/HelveticaNeue-Normal.otf") format("opentype");
}

@font-face {
    font-family: "Helvetica";
    font-weight: bold;
    src: url("./fonts/HelveticaNeue-Medium.eot");
    src: 
    url("./fonts/HelveticaNeue-Medium.ttf") format("truetype"),
    url("./fonts/HelveticaNeue-Medium.woff") format("woff"),
    url("./fonts/HelveticaNeue-Medium.otf") format("opentype");
}

* {
    font-family: Helvetica, Arial, sans-serif;
    list-style: none;
    text-decoration: none;
}

a, button:focus {
    outline: none;
}
    
body {
    margin: 0;
    padding: 0;
}


/* HEADER */

.header {
    height: 280px;
    width: 100%;
    position: relative;
    background-image: url('texture.png');
    background-color: #fdbd00;
}

.logo {
    width: 230px;
    margin-left: calc( 50% - 115px);
    margin-top: 70px;
    position: absolute;
    background-color: #fdc62a;
}

.fill {
    fill: #363536;
}
    
.leafs {
    fill: #93c35e;
}

.filler-o {
    fill: #fdbe00;
}

.text-learning {
    font-size: 80px;
    letter-spacing: 0.2em;
    transform: translate(300px, 511.71px);
}

/* CONTENT */

.contaner {
    width: 100%;
}

.content {
    width: 720px;
    margin: 50px auto;
    overflow: auto;
}

.browser-logo {
    width: 210px;
    float: left;
}

.browser-logo img {
    width: 100%;
    padding: 24px;
    box-sizing: border-box;
    margin-top: 24px;
}

.extension {
    float: left;
    width: 510px;
}

.title {
    font-weight: bold;
    font-size: 36px;
    margin-bottom: 0;
}

.explain {
    font-size: 14px;
	font-weight: normal;
	color: #808080;
    line-height: 18px;
    margin: 32px 0;
}

.install-button {
    width: 190px;
    height: 56px;
    color: #fff;
    background-color: #157ad8;
    border-radius: 8px;
    font-weight: bold;
    font-size: 18px;
    cursor: pointer;
    border: none;
}

.disable {
    cursor: not-allowed;
    background-color: rgba(0, 0, 0, .1);
}

.other-browser {
    color: #157ad8;
    cursor: pointer;
    margin-bottom: 8px;
}

.browsers {
    display: none;
    position: absolute;
    background: #fff;
    border-radius: 4px;
    -webkit-box-shadow: 0 1px 2px 1px rgba(0,0,0,.2);
    box-shadow: 0 1px 2px 1px rgba(0,0,0,.2);
    overflow: hidden;
    padding: 0;
    margin: 0;
}

.browsers.visible {
    display: block;
}

.browsers li {
    padding: 4px 10px;
    line-height: 20px;
    cursor: pointer;
    font-size: 14px;
}

.browsers li:hover {
    background-color: rgba(0, 0, 0, .1)
}

/* FOOTER */

.footer {
    width: 720px;
    position: fixed;
    bottom: 30px;
    left: calc(50% - 360px);
    font-size: 12px;
    font-weight: bold;
}

.footer p {
    color: #808080;
    margin: 8px 0;
}

.footer .emphasize {
    color: #157ad8;
}

.support {
    float: left;
}

.copyright {
    float: right;
}