canvas {
    width: 100%;
    height: 100%;
    display: block;
}
#main {
    position: fixed;
    top: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
}

.container {
    margin: 2em auto;
    padding: 15px 50px;
    border-radius: 25px;
    background-color: rgba(255, 255, 255, 0.9);
    max-width: 1000px;
    width: 90%;
}

.center {
    text-align: center;
}