* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
 
html {
    width: 100%;
    height: 100vh;
}
 
body {
    width: 100%;
    height: 100%;
    background: linear-gradient(-45deg, #536976, #292E49);
}
 
section {
    margin: 1rem auto;
    width: 80%;
}
 
video {
    width: 100%;
    border-radius: 3px;
    box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
}
 
button {
    padding: 0.5rem 1rem;
    border: 0;
    color: #ECEFF1;
    border-radius: 3px;
    background-color: #3F51B5;
    box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: 0.3s;
}
 
button:hover {
    box-shadow: 3px 3px 3px rgba(0, 0, 0, 0.5);
}
 
button:active {
    box-shadow: 3px 3px 3px rgba(0, 0, 0, 0.5) inset;
}
 
#progress-wrap {
    width: 100%;
    height: 1rem;
}
 
#progress-out {
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
    box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
    transform: scaleY(0.5);
    transition: 0.3s;
}
 
#progress-out:hover {
    transform: scaleY(1.0);
    box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    cursor: pointer;
}
 
#progress-in {
    margin: 0 auto 0 0;
    width: 100%;
    height: 100%;
    background-color: #3F51B5;
    border-radius: 3px;
    transform-origin: top left;
    transition: 0.1s;
}
 
#controller-box {
    margin: 2rem auto;
    text-align: center;
}
 
#video-file {
    display: none;
}