.game-2048 {
    gap: 14px;
    width: 100%;
}

.grid-2048 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    background: #151530;
    padding: 10px;
    border-radius: 12px;
    border: 2px solid #2a2a4a;
    /* Fluid width keeps left/right padding on mobile instead of sticking out */
    width: min(100%, 380px);
}

.tile {
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1 / 1;
    border-radius: 10px;
    font-size: clamp(1.1rem, 6vw, 1.5rem);
    font-weight: 700;
    color: #e0e0e0;
    transition: transform 0.1s;
}

@media (min-width: 420px) {
    .tile {
        font-size: 1.5rem;
    }

    .tile.large {
        font-size: 1.3rem;
    }
}

@media (max-width: 380px) {
    .grid-2048 {
        gap: 6px;
        padding: 8px;
    }

    .game-title {
        font-size: 1.5rem;
    }
}

.tile.large {
    font-size: 1.3rem;
}

.tile.gold {
    box-shadow: 0 0 20px rgba(237, 197, 46, 0.5);
    animation: glow 1s ease-in-out infinite alternate;
}

@keyframes glow {
    from { box-shadow: 0 0 15px rgba(237, 197, 46, 0.3); }
    to   { box-shadow: 0 0 30px rgba(237, 197, 46, 0.7); }
}

.overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.75);
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.overlay-content {
    background: #1a1a2e;
    border: 1px solid #2a2a4a;
    border-radius: 16px;
    padding: 40px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.overlay-content h2 {
    font-size: 1.8rem;
    color: #fff;
}

.overlay-content.win h2 {
    color: #edc52e;
}