/* 导入现代字体 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* CSS变量定义 */
:root {
    /* 主题色 */
    --primary-color: #6366f1;
    --primary-hover: #5558e3;
    --primary-light: #e0e7ff;
    --secondary-color: #10b981;
    --secondary-hover: #059669;
    --accent-color: #f59e0b;
    --danger-color: #ef4444;
    --success-color: #22c55e;
    
    /* 中性色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --border-color: #e2e8f0;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* 动画时长 */
    --transition-fast: 150ms;
    --transition-base: 200ms;
    --transition-slow: 300ms;
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

/* 深色主题 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-tertiary: #94a3b8;
        --border-color: #334155;
        --primary-light: #312e81;
    }
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 背景动画 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(59, 130, 246, 0.2) 0%, transparent 50%);
    animation: backgroundMove 20s ease infinite;
    z-index: -1;
}

@keyframes backgroundMove {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

/* 游戏容器 */
#gameContainer {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-2xl);
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.1),
        0 2px 4px -1px rgba(0, 0, 0, 0.06),
        0 20px 25px -5px rgba(0, 0, 0, 0.1),
        0 10px 10px -5px rgba(0, 0, 0, 0.04);
    overflow: hidden;
    max-width: 1000px;
    width: 95vw;
    min-height: 600px;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-slow) ease;
}

#gameContainer:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.1),
        0 2px 4px -1px rgba(0, 0, 0, 0.06),
        0 25px 30px -5px rgba(0, 0, 0, 0.15),
        0 12px 12px -5px rgba(0, 0, 0, 0.06);
}

/* 游戏头部 */
.game-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.game-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: headerShine 3s ease-in-out infinite;
}

@keyframes headerShine {
    0%, 100% { transform: rotate(0deg); }
    50% { transform: rotate(180deg); }
}

.game-info {
    display: flex;
    gap: 2rem;
    align-items: center;
    z-index: 1;
    position: relative;
}

.info-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.info-label {
    font-size: 0.75rem;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-size: 1.5rem;
    font-weight: 600;
    background: linear-gradient(to right, #fff, #e0e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.game-controls {
    display: flex;
    gap: 0.75rem;
    z-index: 1;
    position: relative;
}

.control-btn {
    padding: 0.625rem 1.25rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-base) ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.control-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width var(--transition-base), height var(--transition-base);
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.control-btn:hover::before {
    width: 100%;
    height: 100%;
}

.control-btn:active {
    transform: translateY(0);
}

/* 游戏画布容器 */
.game-canvas-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.game-canvas-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        repeating-linear-gradient(45deg, transparent, transparent 35px, rgba(0,0,0,0.02) 35px, rgba(0,0,0,0.02) 70px);
    pointer-events: none;
}

#gameCanvas {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 100%;
    max-height: 100%;
    background: white;
    transition: transform var(--transition-base) ease;
}

#gameCanvas:hover {
    transform: scale(1.02);
}

/* 加载屏幕 */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity var(--transition-slow) ease;
}

.loading-content {
    text-align: center;
    color: white;
}

.loading-content h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(0.98); }
}

.loading-spinner {
    width: 60px;
    height: 60px;
    margin: 0 auto 2rem;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-bar {
    width: 300px;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
    margin: 0 auto;
}

.loading-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
    transition: width var(--transition-slow) ease;
    position: relative;
    overflow: hidden;
}

.loading-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* 模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    padding: 1rem;
    animation: fadeIn var(--transition-base) ease;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 100%;
    animation: slideUp var(--transition-slow) ease;
    position: relative;
    overflow: hidden;
}

.modal-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.modal-content h2 {
    font-size: 1.875rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.modal-content p {
    margin-bottom: 2rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 按钮样式 */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-base) ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: var(--secondary-hover);
}

.menu-btn {
    width: 100%;
    padding: 1rem 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 1rem;
    background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-secondary));
    border: 1px solid var(--border-color);
}

.menu-btn:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: white;
    border-color: var(--primary-color);
}

/* 游戏完成和胜利界面 */
.win-modal .modal-content,
.complete-modal .modal-content {
    text-align: center;
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
}

.win-info, .complete-info {
    margin: 2rem 0;
}

.win-stats, .complete-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 2rem 0;
}

.stat {
    text-align: center;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-top: 0.5rem;
}

/* 关卡选择 */
.level-select-modal .modal-content {
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
}

.level-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-tertiary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
}

.stat-card .stat-value {
    font-size: 2rem;
}

.page-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.page-tab {
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.875rem;
    transition: all var(--transition-base) ease;
}

.page-tab:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

.page-tab.active {
    background: var(--primary-color);
    color: white;
}

.level-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.level-btn {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base) ease;
    position: relative;
    overflow: hidden;
}

.level-btn:hover:not(:disabled) {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.level-btn.completed {
    background: var(--success-color);
    color: white;
    border-color: var(--success-color);
}

.level-btn.current {
    border-color: var(--primary-color);
    background: var(--primary-light);
    color: var(--primary-color);
}

.level-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.level-number {
    font-size: 1.5rem;
    font-weight: 600;
}

.level-status {
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

/* 帮助界面 */
.help-section {
    margin-bottom: 2rem;
}

.help-section h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.control-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.key-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

/* 触摸控制 */
.touch-controls {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 100;
}

.touch-dpad {
    position: relative;
    width: 150px;
    height: 150px;
}

.touch-btn {
    position: absolute;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
    transition: all var(--transition-fast) ease;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.touch-btn:active {
    background: var(--primary-color);
    color: white;
    transform: scale(0.95);
}

.touch-up {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
}

.touch-down {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.touch-left {
    left: 0;
    top: 50%;
    transform: translateY(-50%);
}

.touch-right {
    right: 0;
    top: 50%;
    transform: translateY(-50%);
}

/* 响应式设计 */
@media (max-width: 768px) {
    #gameContainer {
        width: 100%;
        height: 100vh;
        border-radius: 0;
        max-width: none;
    }
    
    .game-header {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .game-info {
        gap: 1.5rem;
    }
    
    .info-value {
        font-size: 1.25rem;
    }
    
    .game-controls {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
        width: 100%;
        max-width: 300px;
    }
    
    .control-btn {
        font-size: 0.875rem;
        padding: 0.5rem 1rem;
        min-width: auto;
    }
    
    .game-canvas-container {
        padding: 1rem;
    }
    
    .modal-content {
        padding: 1.5rem;
        margin: 1rem;
    }
    
    .level-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }
    
    .touch-controls {
        display: block;
    }
}

@media (max-width: 480px) {
    .game-controls {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.4rem;
        width: 100%;
        max-width: 280px;
    }
    
    .control-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.75rem;
        min-width: auto;
    }
    
    .modal-content h2 {
        font-size: 1.5rem;
    }
    
    .win-stats, .complete-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .stat-value {
        font-size: 2rem;
    }
    
    .level-stats {
        grid-template-columns: 1fr;
    }
}

/* 深色模式样式 */
@media (prefers-color-scheme: dark) {
    #gameContainer {
        background: rgba(15, 23, 42, 0.95);
    }
    
    .modal-content {
        background: var(--bg-primary);
    }
    
    .win-modal .modal-content,
    .complete-modal .modal-content {
        background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    }
    
    #gameCanvas {
        filter: brightness(0.9);
    }
}

/* 动画定义 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* 辅助类 */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }