styles.css

body {
    margin: 0;
    overflow: hidden;
    display: flex;
    height: 100vh;
    background: black;
}

canvas {
    margin: auto;
    touch-action: none;
}

input {
    position: fixed;
    left: 50%;
    bottom: 20px;
    transform: translateX(-50%);
    width: 80%;
    height: 34px;
    max-width: 400px;
    background: transparent;
    -webkit-appearance: none;
    appearance: none;
}
input:active {
    cursor: grabbing;
}
input::-webkit-slider-runnable-track {
    box-sizing: border-box;
    height: 6px;
    background: #fff;
    -webkit-appearance: none;
    appearance: none;
}
input::-moz-range-track {
    box-sizing: border-box;
    height: 6px;
    background: #fff;
    -webkit-appearance: none;
    appearance: none;
}
input::-ms-track {
    box-sizing: border-box;
    height: 6px;
    background: #fff;
    -webkit-appearance: none;
    appearance: none;
}
input::-webkit-slider-thumb {
    margin-top: -12px;
    box-sizing: border-box;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid black;
    -webkit-appearance: none;
    appearance: none;
    cursor: grab;
}
input::-moz-range-thumb {
    box-sizing: border-box;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid black;
    -webkit-appearance: none;
    appearance: none;
    cursor: grab;
}
input::-ms-thumb {
    margin-top: 0px;
    box-sizing: border-box;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid black;
    -webkit-appearance: none;
    appearance: none;
    cursor: grab;
}

section {
    box-sizing: border-box;
    font-size: 30px;
    color: white;
    position: fixed;
    left: 0;
    top: 20px;
    width: 100%;
    text-align: center;
    padding: 10px 10%;
    z-index: 10;
    pointer-events: none;
    text-shadow: 0 0 3px black, 0 0 4px black, 0 0 5px black;
    background: rgba(0, 0, 0, 0.7);
}
section p {
    margin: 0;
}
@media (max-width: 500px) {
    section {
        font-size: 24px;
    }
}