/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Courier New', monospace;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
}

/* 游戏容器 */
#game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 游戏画布 */
#gameCanvas {
    display: block;
    background: #000;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* UI 层 */
#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    /* 关键：确保 UI 层不影响 Canvas 显示 */
    background: transparent !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}

/* 屏幕界面 */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    pointer-events: auto;
    background: rgba(0, 0, 0, 0.7);
}

.screen.active {
    display: flex;
}

/* 像素风格标题 - 移除重影效果 */
.pixel-title {
    font-size: 48px;
    color: #FFD700;
    /* 简化阴影，只保留单层右下方向，避免重影 */
    text-shadow: 3px 3px 0 #8B4513;
    margin-bottom: 20px;
    animation: titleBounce 1s infinite alternate;
    letter-spacing: 4px;
    /* 确保字体清晰 */
    -webkit-font-smoothing: none !important;
}

@keyframes titleBounce {
    from {
        transform: translateY(-5px);
    }
    to {
        transform: translateY(5px);
    }
}

.subtitle {
    color: #FFE4C4;
    font-size: 18px;
    margin-bottom: 40px;
    /* 简化阴影 */
    text-shadow: 2px 2px 0 rgba(0, 0, 0, 0.3);
    -webkit-font-smoothing: none !important;
}

/* 像素按钮 */
.pixel-btn {
    background: linear-gradient(to bottom, #FFB6C1, #FF69B4);
    border: 4px solid #fff;
    border-radius: 8px;
    color: white;
    font-family: 'Courier New', monospace;
    font-size: 20px;
    font-weight: bold;
    padding: 15px 40px;
    margin: 10px;
    cursor: pointer;
    /* 简化按钮文字阴影 */
    text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.2);
    box-shadow: 
        0 6px 0 #C71585,
        0 8px 10px rgba(0, 0, 0, 0.3);
    transition: all 0.1s;
    image-rendering: pixelated;
    -webkit-font-smoothing: none !important;
}

.pixel-btn:hover {
    background: linear-gradient(to bottom, #FFC0CB, #FF7FAB);
    transform: translateY(-2px);
    box-shadow: 
        0 8px 0 #C71585,
        0 10px 12px rgba(0, 0, 0, 0.3);
}

.pixel-btn:active {
    transform: translateY(4px);
    box-shadow: 
        0 2px 0 #C71585,
        0 3px 5px rgba(0, 0, 0, 0.3);
}

.pixel-btn.small {
    font-size: 14px;
    padding: 8px 20px;
}

/* 说明文字 */
.instructions {
    margin-top: 30px;
    color: #E0FFFF;
    font-size: 16px;
    text-align: center;
    line-height: 1.8;
    /* 简化阴影 */
    text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.3);
    -webkit-font-smoothing: none !important;
}

/* HUD - 游戏界面 */
#game-ui {
    justify-content: flex-start;
    background: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    pointer-events: none;
}

#game-ui > * {
    pointer-events: auto;
}

.hud {
    display: flex;
    justify-content: space-between;
    width: 100%;
    padding: 20px;
    padding-right: 140px; /* 为暂停按钮留出空间 */
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.5), transparent);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: white;
    /* 简化 HUD 文字阴影 */
    text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.5);
    -webkit-font-smoothing: none !important;
}

.stat .label {
    font-size: 12px;
    opacity: 0.8;
    margin-bottom: 5px;
}

.stat span:last-child {
    font-size: 24px;
    font-weight: bold;
    color: #FFD700;
}

#pause-btn {
    position: absolute;
    top: 20px;
    right: 20px;
}

/* 星星显示 */
.stars {
    display: flex;
    gap: 20px;
    margin: 20px 0;
}

.star {
    font-size: 48px;
    filter: drop-shadow(0 0 10px #FFD700);
    animation: starPulse 1s infinite alternate;
}

.star:nth-child(2) {
    animation-delay: 0.2s;
}

.star:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes starPulse {
    from {
        transform: scale(1);
        filter: drop-shadow(0 0 10px #FFD700);
    }
    to {
        transform: scale(1.2);
        filter: drop-shadow(0 0 20px #FFD700);
    }
}

.result-text {
    color: #FFE4C4;
    font-size: 24px;
    margin: 20px 0;
    /* 简化阴影 */
    text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.3);
    -webkit-font-smoothing: none !important;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .pixel-title {
        font-size: 32px;
    }
    
    .subtitle {
        font-size: 14px;
    }
    
    .pixel-btn {
        font-size: 16px;
        padding: 12px 30px;
    }
    
    .hud {
        padding: 10px;
    }
    
    .stat span:last-child {
        font-size: 18px;
    }
}

/* 隐藏状态 */
.hidden {
    display: none !important;
}

/* 加载动画 */
.loading {
    width: 60px;
    height: 60px;
    border: 6px solid #FFD700;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}