/* Basic reset */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    background: radial-gradient(1000px 600px at 20% 10%, #ffffff, #f2f4f8);
    color: #0b1220;
}

#controls {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 10;
    display: flex;
    gap: 8px;
}

#resetBtn {
    appearance: none;
    border: 1px solid #c9d1e6;
    background: #fff;
    color: #0b1220;
    padding: 8px 12px;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(16,24,40,0.06);
}

#resetBtn:hover { background: #f8fafc; }

#scene {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    display: block;
}