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

:root {
    /* 现代色彩系统 */
    --primary-color: #6366f1;
    --primary-hover: #5b5fcf;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* 背景色 */
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --bg-card: #252545;
    --bg-hover: #2a2a4a;
    
    /* 文字色 */
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    
    /* 边框和阴影 */
    --border-color: #374151;
    --border-light: #4b5563;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* 过渡动画 */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
}

/* 全局字体和基础样式 */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
}

/* 左侧边栏 */
.sidebar {
    width: 280px;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 1000;
    overflow-y: auto;
}

.sidebar-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 1.75rem;
}

/* 侧边栏导航 */
.sidebar-nav {
    flex: 1;
    padding: var(--spacing-lg) 0;
}

.nav-list {
    list-style: none;
}

.nav-item {
    margin: 0 var(--spacing-md) var(--spacing-xs) var(--spacing-md);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    font-weight: 500;
}

.nav-link:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: translateX(4px);
}

.nav-item.active .nav-link {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

.nav-link i {
    width: 20px;
    text-align: center;
}

/* 侧边栏底部 */
.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-hover);
    border-radius: var(--radius-lg);
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.user-details {
    display: flex;
    flex-direction: column;
}

.username {
    font-weight: 600;
    color: var(--text-primary);
}

.user-gold {
    font-size: 0.875rem;
    color: var(--warning-color);
}

.login-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

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

/* 主内容区域 */
.main-content {
    flex: 1;
    margin-left: 280px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 顶部搜索栏 */
.top-bar {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.search-container {
    flex: 1;
    max-width: 500px;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.search-box:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-icon {
    position: absolute;
    left: var(--spacing-lg);
    color: var(--text-muted);
    z-index: 1;
}

.search-input {
    flex: 1;
    background: transparent;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-md) 3rem;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    font-weight: 600;
    transition: background var(--transition-normal);
}

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

/* 顶部操作区域 */
.top-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.sort-options {
    display: flex;
    gap: var(--spacing-sm);
}

.sort-btn {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 500;
}

.sort-btn:hover,
.sort-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.view-options {
    display: flex;
    gap: var(--spacing-xs);
}

.view-btn {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.view-btn:hover,
.view-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 分类标签 */
.category-tags {
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--bg-secondary);
}

.tag-list {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.tag {
    background: var(--bg-card);
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.tag:hover,
.tag.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* 内容区域 */
.content-area {
    flex: 1;
    padding: var(--spacing-xl);
    background: var(--bg-primary);
}

/* 游戏网格布局 - 缩小卡片尺寸 */
.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
}

/* 游戏卡片 - 背景覆盖设计 */
.game-card {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    cursor: pointer;
    aspect-ratio: 3 / 4;
    background: var(--bg-card);
}

.game-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.game-card-image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.game-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.game-card:hover .game-card-image img {
    transform: scale(1.05);
}

.game-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        180deg,
        rgba(0,0,0,0.3) 0%,
        rgba(0,0,0,0.5) 40%,
        rgba(0,0,0,0.8) 100%
    );
    z-index: 1;
}

.game-card-badges-left {
    position: absolute;
    top: var(--spacing-xs);
    left: var(--spacing-xs);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    z-index: 2;
}

.game-card-badges-right {
    position: absolute;
    top: var(--spacing-xs);
    right: var(--spacing-xs);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    z-index: 2;
}

.badge {
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.65rem;
    font-weight: 600;
    backdrop-filter: blur(10px);
}

.badge.hot {
    background: rgba(239, 68, 68, 0.7);
}

.badge.new {
    background: rgba(16, 185, 129, 0.7);
}

.badge.free {
    background: rgba(99, 102, 241, 0.7);
}

.badge.size {
    background: rgba(6, 182, 212, 0.7);
}

.badge.rank {
    background: rgba(251, 146, 60, 0.8);
}

.badge.top {
    background: rgba(168, 85, 247, 0.8);
}

.badge.exchanged {
    background: rgba(34, 197, 94, 0.8);
}

.badge.favorite {
    background: rgba(236, 72, 153, 0.8);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.badge.favorite i {
    font-size: 0.6rem;
}

/* 游戏卡片内容区域 - 统一规范 */
.game-card-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-sm);
    z-index: 2;
    color: white;
}

/* 卡片标题 */
.game-card-content .game-card-title {
    font-size: 1rem;
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-xs);
    line-height: 1.3;
    text-shadow: 0 1px 2px rgba(0,0,0,0.5);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 卡片描述 */
.game-card-content .game-card-desc {
    color: rgba(255,255,255,0.8);
    font-size: 0.7rem;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

/* 卡片底部信息 */
.game-card-content .game-card-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    font-size: 0.65rem;
    gap: 1rem;
}

.game-card-content .game-price {
    display: flex;
    align-items: center;
    gap: 2px;
    font-weight: 700;
    color: var(--warning-color);
    text-shadow: 0 1px 2px rgba(0,0,0,0.5);
    font-size: 0.65rem;
}

.game-card-content .price-value {
    font-size: 0.65rem;
}

/* 游戏详细信息行 */
.game-card-content .game-info-row {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    color: rgba(255,255,255,0.8);
    font-size: 0.65rem;
    margin-bottom: 2px;
    gap: 0.5rem;
}

.game-card-content .game-info-row:last-child {
    margin-bottom: 0;
}

.game-card-content .game-info-label {
    color: rgba(255,255,255,0.7);
}

.game-card-content .game-info-value {
    color: rgba(255,255,255,0.95);
    font-weight: 500;
}

.game-card-content .game-upload-date {
    color: rgba(255,255,255,0.7);
    font-size: 0.65rem;
}

.game-card-content .game-card-favorited {
    color: rgba(255,255,255,0.7);
    font-size: 0.65rem;
    margin-top: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.game-card-content .game-card-favorited::before {
    content: "❤️";
    font-size: 0.6rem;
}

/* 加载动画 */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

.page-btn {
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 500;
    min-width: 40px;
    text-align: center;
}

.page-btn:hover,
.page-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 弹窗样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.9) translateY(20px);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--bg-hover);
    color: var(--text-secondary);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.modal-close:hover {
    background: var(--error-color);
    color: white;
}

/* 游戏详情弹窗 */
.game-detail {
    padding: var(--spacing-2xl);
    min-width: 600px;
}

.game-header {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.game-poster {
    width: 200px;
    aspect-ratio: 566 / 754;
    object-fit: cover;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.game-info {
    flex: 1;
}

.game-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

/* 游戏详情弹窗专用样式 */
.game-detail .game-meta {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

.game-detail .game-platform,
.game-detail .game-size {
    background: var(--bg-tertiary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.game-detail .game-price {
    background: var(--bg-tertiary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-color);
}

.game-detail .price-label {
    color: var(--text-secondary);
    margin-right: var(--spacing-sm);
}

.game-detail .price-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--warning-color);
}

.game-detail .price-unit {
    color: var(--text-secondary);
    margin-left: var(--spacing-xs);
}

.exchange-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--success-color), var(--accent-color));
    color: white;
    border: none;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: 1.125rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

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

.game-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
}

.game-description h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

.game-description p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.game-stats {
    background: var(--bg-tertiary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.stat-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
}

.stat-item:last-child {
    border-bottom: none;
}

.stat-label {
    color: var(--text-secondary);
}

.stat-value {
    color: var(--text-primary);
    font-weight: 600;
}

/* 登录弹窗 */
.login-modal {
    width: 400px;
}

.login-form {
    padding: var(--spacing-2xl);
}

.login-form h2 {
    text-align: center;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.login-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: 0.875rem;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.submit-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

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

/* 响应式设计 */
@media (max-width: 1200px) {
    .games-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: var(--spacing-sm);
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .top-bar {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: stretch;
    }
    
    .top-actions {
        justify-content: space-between;
    }
    
    .games-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .game-card-content {
        padding: var(--spacing-sm);
    }
    
    .game-card-title {
        font-size: 0.9rem;
    }
    
    .game-card-desc {
        font-size: 0.65rem;
        -webkit-line-clamp: 1;
    }
    
    .game-detail {
        min-width: auto;
        padding: var(--spacing-lg);
    }
    
    .game-header {
        flex-direction: column;
        text-align: center;
    }
    
    .game-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .games-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
        gap: var(--spacing-xs);
    }
    
    .game-card-content {
        padding: var(--spacing-sm);
    }
    
    .game-card-title {
        font-size: 0.85rem;
        -webkit-line-clamp: 1;
    }
    
    .game-card-desc {
        display: none; /* 在小屏幕上隐藏描述 */
    }
    
    .game-card-meta {
        font-size: 0.7rem;
        margin-bottom: var(--spacing-xs);
    }
    
    .game-card-footer {
        font-size: 0.65rem;
    }
    
    .category-tags {
        padding: var(--spacing-md);
    }
    
    .tag-list {
        gap: var(--spacing-sm);
    }
    
    .content-area {
        padding: var(--spacing-md);
    }
}