html {
    font-size: 100%;
    user-select: none;
    height: 100%;
}
* {
    box-sizing: border-box;
    touch-action: none;
    overscroll-behavior: none;
}
html, body {
    position: fixed;
    overflow: hidden;
    width: 100vw;
}
body {
    margin: 0;
    padding: 0;
    background: #000;
    touch-action: none;
    overscroll-behavior: none;
}

.light {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background: radial-gradient(circle at var(--mouse-x) var(--mouse-y), rgba(249, 241, 7, 0.4), transparent 150px);
    transition: background 0.1s linear;
    z-index: 1;
}

.stage {
    background: #fff;
    padding: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    position: relative;
}

:root {
    --shadow-color: rgba(195, 4, 163, 0.5);
    --shadow-offset-x: 40px;
    --shadow-offset-y: 30px;
    --shadow-blur: 40px;
    --shadow-spread: 15px;
    --actor-size: 100px;
}

.actor {
    background: rgb(204, 0, 255, 0.95);
    backdrop-filter: blur(10px);
    height: var(--actor-size);
    width: var(--actor-size);
    will-change: box-shadow;
    box-shadow: var(--shadow-offset-x) var(--shadow-offset-y) var(--shadow-blur) var(--shadow-spread) var(--shadow-color);
    transition: box-shadow 0.3s linear;
}