html, body {
    margin: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: system-ui, sans-serif;
    background: #eee;
    overscroll-behavior: none;
}

/* ================= Canvas ================= */

canvas {
    position: fixed;
    inset: 0;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    outline: none;
}

/* ================= Debug Window ================= */

.debug-window {
    position: fixed;
    bottom: 18px;
    left: 18px;
    width: 200px;
    max-height: 40vh;
    background: rgba(0,0,0,0.5);
    color: #0f0;
    font-family: monospace;
    font-size: 12px;
    padding: 12px;
    border-radius: 8px;
    box-shadow: 0 10px 28px rgba(0,0,0,0.5);
    overflow-y: auto;
    z-index: 200;
}