* {
box-sizing: border-box;
}

header, body {
text-align: center;
font-family: arial;
font-size: 20px;

}

.wrapper-index {
background: rgb(113, 179, 247);
text-align:center;
height: 1000px;
}

.wrapper-videos {
background: rgb(113, 179, 247);
text-align:center;
height: 1750px;
}

a.main-link {
font-size: 38px;
transition: all 0.5s ease-out;
}

.video li a {
font-size: 20px;
transition: all 0.5s ease-out;
}

a:link {
color: blue;
}

a:unvisited {
color: blue;
}

a:visited {
color: blue;
}

a:hover {
color: black;
}

a.it-ticket{
color: rgb(231, 76, 60);
}

h4 {
font-size: 24px;
}

ul {
    list-style-type: none;
}

.back {
    font-size: 32px;
}

.video-title {
    padding: 1em;
}