:root {
    --bg-color: #f0f2f5;
    --card-bg: rgba(255, 255, 255, 0.7);
    --text-color: #333;
    --accent: #4a90e2;
}

.dark-mode {
    --bg-color: #1a1a2e;
    --card-bg: rgba(255, 255, 255, 0.1);
    --text-color: #fff;
    --accent: #e94560;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Segoe UI', sans-serif;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.container {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 90%;
    max-width: 500px;
}

.choice {
    font-size: 3rem;
    background: none;
    border: none;
    cursor: pointer;
    transition: transform 0.2s;
}

.choice:hover {
    transform: scale(1.2);
}

#play-again {
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
}