/*
html5doctor.com Reset Stylesheet
v1.6.1
Last Updated: 2010-09-17
Author: Richard Clark - http://richclarkdesign.com
Twitter: @rich_clark
*/

html, body, div, span, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
abbr, address, cite, code,
del, dfn, em, img, ins, kbd, q, samp,
small, strong, sub, sup, var,
b, i,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, figcaption, figure,
footer, header, hgroup, menu, nav, section, summary,
time, mark, audio, video {
    margin:0;
    padding:0;
    border:0;
    outline:0;
    font-size:100%;
    vertical-align:baseline;
    background:transparent;
}

body {
    line-height:1;
}

article,aside,details,figcaption,figure,
footer,header,hgroup,menu,nav,section {
    display:block;
}

nav ul {
    list-style:none;
}

blockquote, q {
    quotes:none;
}

blockquote:before, blockquote:after,
q:before, q:after {
    content:'';
    content:none;
}

a {
    margin:0;
    padding:0;
    font-size:100%;
    vertical-align:baseline;
    background:transparent;
    text-decoration: none;
}

/* change colours to suit your needs */
ins {
    background-color:#ff9;
    color:#000;
    text-decoration:none;
}

/* change colours to suit your needs */
mark {
    background-color:#ff9;
    color:#000;
    font-style:italic;
    font-weight:bold;
}

del {
    text-decoration: line-through;
}

abbr[title], dfn[title] {
    border-bottom:1px dotted;
    cursor:help;
}

table {
    border-collapse:collapse;
    border-spacing:0;
}

/* change border colour to suit your needs */
hr {
    display:block;
    height:1px;
    border:0;  
    border-top:1px solid #cccccc;
    margin:1em 0;
    padding:0;
}

input, select {
    vertical-align:middle;
}

header{
    background-color:#282F35;
    height:60px;
    display: flex;
    justify-content: space-between;
    position:fixed;
    z-index:10;
    width:100%;
}
.header-icon{
    width:130px;
    padding:16px 20px;
}
.header-menu ul{
    display: flex;
}
#menu-btn{
    display: none;
}
.header-btn{
    line-height:60px ;
    color:#fff;
    display:inline-block;
    padding:0px 20px;
}
.header-btn:hover{
    background-color: #cccccc;
}
.page-top{
    background-image: url(top.png);
    background-size: cover;
    height: 450px;
    color:rgba(255,255,255,0.7);
    text-align: center;
}
.page-top h1{
    font-size: 27px;
    letter-spacing: 4px;
    padding-top:120px;
    line-height: 40px;
}
.page-top p{
    font-size: 10px;
    line-height: 15px;
}
.btn{
    display: inline-block;
    font-size: 10px;
    margin:10px 4px;
    color: #fff;
    padding:8px 20px;
    border-radius: 3px;
    opacity:0.7;
}
.sign-up{
    margin-top:15px;
    background-color: #369145;
}
.facebook{
    background-color: #435fdb;
}
.twitter{
    background-color: #0d91dd;
}
i{
    margin-right:3px;
}
.btn:hover{
    opacity:1;
}
.page-main{
    background-color: rgb(241, 242, 243);
    text-align: center;
}
.lessons{
    margin:0 50px;
    display: flex;
    flex-wrap: wrap;
}
.page-main h1{
    font-weight: 1;
    font-size: 18px;
    padding-top:60px;
    padding-bottom:40px;
    color: rgb(85, 85, 85);
}
.lesson{
    box-sizing:border-box;
    width:25%;
    padding:18px;
}
.lesson-icon{
    position:relative;
}
.lesson-name{
    color: #fff;
    font-weight: normal;
    font-size: 15px;
    text-align: center;
    position:absolute;
    top:90px;
    width: 100%;
}
.lesson p{
    font-size: 13px;
    padding-top:20px;
    padding-bottom: 70px;
    color: rgb(143, 143, 143);
    line-height: 18px;
}
.page-bottom{
    text-align: center;
    color: rgb(85, 85, 85);
    border-bottom: 2px solid rgb(241, 242, 243);
}
.page-bottom h2{
    font-weight: normal;
    padding-top:70px;
}
.page-bottom h3{
    font-weight: normal;
    font-size: 13px;
    line-height: 30px;
}
.page-bottom-btn{
    background-color: #3eaa59;
    box-shadow:0px 5px #1b6446;
    padding: 12px 25px;
    margin-top:30px;
    margin-bottom: 40px;
}
.page-bottom-btn:active{
    position:relative;
    top:5px;
    box-shadow: none;
}
footer{
    height:30px;
}
.footer-icon{
    width:100px;
    padding-top:20px;
    padding-left:20px;
}
footer p{
    font-size:10px;
    color:  rgb(143, 143, 143);
    padding-left: 20px;
}