@import url("https://fonts.googleapis.com/css?family=Open+Sans:400,600,700");
@import url("https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css");
*, *:before, *:after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100vh;
}

body {
    font: 14px/1 'Open Sans', sans-serif;
    color: #555;
    background: #eee;
}

h1 {
    padding: 50px 0;
    font-weight: 400;
    text-align: center;
}

p {
    margin: 0 0 20px;
    line-height: 1.5;
}

main {
    min-width: 320px;
    max-width: 960px;
    padding: 50px;
    margin: 0 auto;
    background: #fff;
}

section {
    display: none;
    padding: 20px 0;
    border-top: 1px solid #ddd;
}

input {
    display: none;
}

label {
    display: inline-block;
    margin: 0 0 -1px;
    padding: 15px 25px;
    font-weight: 600;
    text-align: center;
    color: #bbb;
    border: 1px solid transparent;
}

label:before {
    font-family: fontawesome;
    font-weight: normal;
    margin-right: 10px;
}

label[for*='1']:before {
    /*content: '\f1cb';*/
    content: '\f03e';
}

label[for*='2']:before {
    /*content: '\f17d';*/
    content: '\f03e';
}

label[for*='3']:before {
    /*content: '\f16b';*/
    content: '\f11b';
}

label[for*='4']:before {
    /*content: '\f1a9';*/
    content: '\f1ec';
}

label:hover {
    color: #888;
    cursor: pointer;
}

input:checked + label {
    color: #555;
    border: 1px solid #ddd;
    border-top: 2px solid orange;
    border-bottom: 1px solid #fff;
}

#tab1:checked ~ #content1,
#tab2:checked ~ #content2,
#tab3:checked ~ #content3,
#tab4:checked ~ #content4 {
    display: block;
}

#tower,#calculator {
    width: 100%;
    height: 80vh;
}

@media screen and (max-width: 650px) {
    label {
        font-size: 0;
    }

    label:before {
        margin: 0;
        font-size: 18px;
    }
}
@media screen and (max-width: 400px) {
    label {
        padding: 15px;
    }
}
/*--------------------------------------------------------------------------------------------------------------------*/

#content1{
    background:#ccc;
}
.main {
    font-family:Arial;
    width:100%;
    display:block;
    margin:0 auto;
}
h3 {
    background: #fff;
    color: #3498db;
    font-size: 36px;
    line-height: 100px;
    margin: 10px;
    padding: 2%;
    position: relative;
    text-align: center;
}
.action{
    display:block;
    margin:100px auto;
    width:100%;
    text-align:center;
}
.action a {
    display:inline-block;
    padding:5px 10px;
    background:#f30;
    color:#fff;
    text-decoration:none;
}
.action a:hover{
    background:#000;
}

.slider {
    width: 650px;
    margin: 0 auto;
}

.slider.slider-for {
    margin-bottom: 10px;
}

.slider.slider-for img {
    max-width: 800px;
    width: 100%;
    height: 400px;
    overflow: hidden;
}

.slider.slider-nav img {
    width: 200px;
    height: 100px;
}