body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #000;
    overflow: hidden; /* Evita lo scroll della pagina */
    touch-action: none; /* Importante per mobile */
}

.scratch-container {
    position: relative;
    /* Rapporto 1080:1780 */
    width: 90vw; 
    aspect-ratio: 1080 / 1780;
    max-height: 95vh; /* Evita che esca dallo schermo in altezza */
    max-width: 1080px;
    background-color: #111;
    box-shadow: 0 0 30px rgba(0,0,0,0.5);
}

.prize-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

#scratch-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    touch-action: none;
    cursor: crosshair;
}