/* 全局样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f7;
    color: #1d1d1f;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header样式 */
header {
    background-color: #ffffff;
    padding: 1rem 2rem;
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    font-weight: 600;
    font-size: 1.5rem;
    margin: 0;
}

.score-display {
    font-size: 1.2rem;
}

/* 游戏主区域 */
main {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    flex: 1;
}

#game-canvas {
    border: 1px solid #d2d2d7;
    background-color: #ffffff;
    border-radius: 12px;
    margin-bottom: 1.5rem;
}

.controls {
    display: flex;
    gap: 1rem;
}

button {
    background-color: #0071e3;
    color: white;
    border: none;
    border-radius: 980px;
    padding: 0.5rem 1.5rem;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
}

button:hover {
    background-color: #0077ed;
}

/* Footer样式 */
footer {
    background-color: #ffffff;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 -1px 0 rgba(0, 0, 0, 0.1);
}

.leaderboard {
    margin-bottom: 1.5rem;
}

.leaderboard h2 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

#high-scores {
    list-style-type: none;
    padding: 0;
    margin: 0 auto;
    max-width: 200px;
}

#high-scores li {
    padding: 0.5rem;
    border-bottom: 1px solid #d2d2d7;
}

.copyright {
    color: #86868b;
    font-size: 0.9rem;
    text-align: center;
    margin-top: 20px;
    animation: pulse 2s infinite;
    transition: all 0.3s ease;
}

.copyright:hover {
    color: #0071e3;
    transform: scale(1.1);
    animation: none;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}