html {
    height: 100%;
}

body {
    height: 100%;
    margin: 0;
    overflow: hidden;
    background: linear-gradient(to bottom, #202020, #111119);
}

.rain {
    position: absolute;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

.rain.back-row {
    display: none;
    z-index: 1;
    bottom: 60px;
    opacity: 0.5;
}

body.back-row-toggle .rain.back-row {
    display: block;
}

.drop {
    position: absolute;
    bottom: 100%;
    width: 15px;
    height: 120px;
    pointer-events: none;
    animation: drop 0.5s linear infinite;
}

@keyframes drop {
    0% {
        transform: translateY(0vh);
    }

    75% {
        transform: translateY(90vh);
    }

    100% {
        transform: translateY(90vh);
    }
}

.stem {
    width: 1px;
    height: 60%;
    margin-left: 7px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.25));
    animation: stem 0.5s linear infinite;
}

@keyframes stem {
    0% {
        opacity: 1;
    }

    65% {
        opacity: 1;
    }

    75% {
        opacity: 0;
    }

    100% {
        opacity: 0;
    }
}

.splat {
    width: 15px;
    height: 10px;
    border-top: 2px dotted rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    opacity: 1;
    transform: scale(0);
    animation: splat 0.5s linear infinite;
    display: none;
}

body.splat-toggle .splat {
    display: block;
}

@keyframes splat {
    0% {
        opacity: 1;
        transform: scale(0);
    }

    80% {
        opacity: 1;
        transform: scale(0);
    }

    90% {
        opacity: 0.5;
        transform: scale(1);
    }

    100% {
        opacity: 0;
        transform: scale(1.5);
    }
}

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

.toggle {
    position: absolute;
    left: 20px;
    width: 50px;
    height: 50px;
    line-height: 51px;
    box-sizing: border-box;
    text-align: center;
    font-family: sans-serif;
    font-size: 10px;
    font-weight: bold;
    background-color: rgba(255, 255, 255, 0.2);
    color: rgba(0, 0, 0, 0.5);
    border-radius: 50%;
    cursor: pointer;
    transition: background-color 0.3s;
}

.toggle:hover {
    background-color: rgba(255, 255, 255, 0.25);
}

.toggle:active {
    background-color: rgba(255, 255, 255, 0.3);
}

.toggle.active {
    background-color: rgba(255, 255, 255, 0.4);
}

.splat-toggle {
    top: 20px;
}

.back-row-toggle {
    top: 90px;
    line-height: 12px;
    padding-top: 14px;
}

.single-toggle {
    top: 160px;
}

body.single-toggle .drop {
    display: none;
}

body.single-toggle .drop:nth-child(10) {
    display: block;
}