* {
    margin: 0px;
    padding: 0px;
}

body {
    font-family: 'Roboto', sans-serif;
    cursor: pointer;
}

canvas {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 3;
}

.cover {
    background: radial-gradient(circle at 50% 10%, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.8));
    width: 100%;
    height: 100%;
    position: fixed;
    z-index: 1;
}

@font-face {
    font-family: "study-alone";
    src: url(assets/fonts/study-alone.otf) format("opentype");
}

.instruction {
    color: white;
    font-family: "study-alone";
    font-size: 30px;
    position: absolute;
    left: 50%;
    top: 10%;
    transform: translate(-50%);
    white-space: nowrap;
}

@font-face {
    font-family: "novamona";
    src: url(assets/fonts/novamono.ttf) format("truetype");
}

.clock {
    width: 100%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    font-size: 18em;
    font-family: "novamona";
    letter-spacing: 0.1em;
}

.area {
    background: #cc0000;
    width: 100%;
    height: 100vh;
}

.area-rainbow {
    background-color: #cc0000;
    width: 100%;
    height: 100vh;
    animation: rainbow 10s linear infinite;
}

@keyframes rainbow {
    0%, 100% {
        background-color: #cc0000;
    }

    33% {
        background-color: green;
    }

    66% {
        background-color: blue;
    }
}

.circles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.circles li {
    position: absolute;
    display: block;
    list-style: none;
    width: 20px;
    height: 20px;
    background: rgba(255, 255, 255, 0.2);
    animation: backg 20s linear infinite;
    bottom: -150px;
}

.circles li:nth-child(1){
    left: 25%;
    width: 80px;
    height: 80px;
    animation-delay: 0s;
}

.circles li:nth-child(2){
    left: 10%;
    width: 20px;
    height: 20px;
    animation-delay: 2s;
    animation-duration: 12s;
}

.circles li:nth-child(3){
    left: 70%;
    width: 20px;
    height: 20px;
    animation-delay: 4s;
}

.circles li:nth-child(4){
    left: 40%;
    width: 60px;
    height: 60px;
    animation-delay: 0s;
    animation-duration: 18s;
}

.circles li:nth-child(5){
    left: 65%;
    width: 20px;
    height: 20px;
    animation-delay: 0s;
}

.circles li:nth-child(6){
    left: 75%;
    width: 110px;
    height: 110px;
    animation-delay: 3s;
}

.circles li:nth-child(7){
    left: 35%;
    width: 150px;
    height: 150px;
    animation-delay: 7s;
}

.circles li:nth-child(8){
    left: 50%;
    width: 25px;
    height: 25px;
    animation-delay: 15s;
    animation-duration: 45s;
}

.circles li:nth-child(9){
    left: 20%;
    width: 15px;
    height: 15px;
    animation-delay: 2s;
    animation-duration: 35s;
}

.circles li:nth-child(10){
    left: 85%;
    width: 150px;
    height: 150px;
    animation-delay: 0s;
    animation-duration: 11s;
}

@keyframes backg {
    0% {
        transform: translateY(0) rotate(0deg);
        border-radius: 20%;
        opacity: 1;
    }
    
    100% {
        transform: translateY(-1000px) rotate(720deg);
        border-radius: 20%;
        opacity: 0;
    }
}