* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { width: 100%; height: 100%; overflow: hidden; touch-action: none; }
body { background: #000; display: flex; align-items: center; justify-content: center; font-family: 'Comic Sans MS', sans-serif; }
button {
    padding: 15px 35px;
    font-size: 18px;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    font-family: inherit;
}
button:active { transform: scale(0.95); }
canvas { display: block; position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.hidden { opacity: 0 !important; pointer-events: none !important; }