*{
margin:0px;
padding:0px;
box-sizing:border-box;
}

body{
width:100%;
min-height:100vh;
font-family:sans-serif;
}
.none{
display:none;
}
a{
text-decoration:none;
}
ul,li{
list-style:none
}
.container{
max-width:1470px;
margin:0 auto;
padding:0 15px;
}
.main-title{
    text-align:center;
    padding: 10px 0;
}
.article {
   padding: 20px;
    border: 1px solid teal;
    margin-bottom: 20px;
}
.to-top {
   position: fixed;
    bottom: 20px;
    right: 20px;
    color: green;
    padding: 4px 8px;
    border: 1px solid teal;
}