body {
    font-family: 'Arial', sans-serif;
    background: #111;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.game-container {
    text-align: center;
    padding: 20px;
    width: 95%;
    max-width: 1000px;
}

h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
    color: #fffa;
}

.tile-line {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 20px 0;
    overflow-x: auto;
    padding-bottom: 10px;
}

.tile {
    width: 80px;
    height: 120px;
    background: #222;
    border-radius: 12px;
    cursor: pointer;
    perspective: 1000px;
    position: relative;
    box-shadow: 0 0 10px #0ff;
    transition: transform 0.5s;
}

.tile.flipped {
    transform: rotateY(180deg);
}

.tile .front, .tile .back {
    width: 100%;
    height: 100%;
    border-radius: 12px;
    position: absolute;
    backface-visibility: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    font-weight: bold;
}

.tile .front {
    background: #0ff3;
    color: #000;
}

.tile .back {
    background: #222;
    color: #0ff;
    transform: rotateY(180deg);
}

.controls button {
    padding: 8px 15px;
    margin: 5px;
    font-size: 16px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    background: linear-gradient(45deg, #0ff, #0f0);
    color: #000;
    font-weight: bold;
    box-shadow: 0 0 10px #0ff;
    transition: 0.3s;
}

.controls button:hover {
    box-shadow: 0 0 20px #0ff, 0 0 40px #0f0;
}

.score, .timer {
    font-size: 1.2rem;
    margin: 5px;
}