@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* --- 基础与主题变量定义 --- */
:root {
    /* Style C (默认 - 现代极简高端质感 - 亮色基调) */
    --bg-app: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-hover: #ffffff;
    --border-color: rgba(226, 232, 240, 0.8);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent-color: #6366f1; /* Indigo */
    --accent-rgb: 99, 102, 241;
    --accent-hover: #4f46e5;
    --success-color: #10b981; /* Emerald */
    --warning-color: #f59e0b; /* Amber */
    --danger-color: #ef4444; /* Rose */
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.02);
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Outfit', sans-serif;
    --border-radius: 16px;
    --backdrop-blur: 12px;
    --glow-effect: none;
}

/* Style A (备用 - 霓虹暗色玻璃微光) */
[data-theme="style-a"] {
    --bg-app: #09090b;
    --bg-card: rgba(18, 18, 24, 0.65);
    --bg-card-hover: rgba(24, 24, 37, 0.8);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #52525b;
    --accent-color: #d946ef; /* Magenta Pink */
    --accent-rgb: 217, 70, 239;
    --accent-hover: #c084fc;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #f43f5e;
    --card-shadow: 0 8px 32px 0 rgba(217, 70, 239, 0.08);
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Outfit', sans-serif;
    --border-radius: 20px;
    --backdrop-blur: 20px;
    --glow-effect: 0 0 20px rgba(217, 70, 239, 0.35);
}

/* Style B (备用 - 赛博极客高科技) */
[data-theme="style-b"] {
    --bg-app: #030712;
    --bg-card: rgba(17, 24, 39, 0.9);
    --bg-card-hover: #1f2937;
    --border-color: #06b6d4; /* Cyan border */
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #4b5563;
    --accent-color: #06b6d4; /* Cyber Cyan */
    --accent-rgb: 6, 182, 212;
    --accent-hover: #22d3ee;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --card-shadow: 0 0 15px rgba(6, 182, 212, 0.2);
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Space Grotesk', sans-serif;
    --border-radius: 4px; /* Sharp technical edges */
    --backdrop-blur: 0px;
    --glow-effect: 0 0 10px rgba(6, 182, 212, 0.6);
}

/* --- 基础与重置样式 --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}

body {
    background-color: var(--bg-app);
    color: var(--text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* --- 容器布局 --- */
.container {
    max-width: 1280px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
    flex: 1;
}

/* --- 顶部导航栏 --- */
header {
    background: var(--bg-card);
    backdrop-filter: blur(var(--backdrop-blur));
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.brand {
    position: absolute;
    left: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.brand span {
    color: var(--accent-color);
    text-shadow: var(--glow-effect);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    position: relative;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--accent-color);
    background: rgba(var(--accent-rgb), 0.1);
}

/* --- 主题选择器 --- */
.theme-selector {
    position: absolute;
    left: 100%;
    margin-left: 1rem;
    white-space: nowrap;
    display: flex;
    background: rgba(0, 0, 0, 0.05);
    padding: 0.25rem;
    border-radius: 20px;
    gap: 0.25rem;
}

[data-theme="style-a"] .theme-selector, [data-theme="style-b"] .theme-selector {
    background: rgba(255, 255, 255, 0.05);
}

.theme-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
    border-radius: 15px;
    font-weight: 600;
}

.theme-btn.active {
    background: var(--accent-color);
    color: #ffffff;
    box-shadow: var(--glow-effect);
}

/* --- 卡片组件 --- */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(var(--backdrop-blur));
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
}

.card:hover {
    background: var(--bg-card-hover);
}

/* 仅在用户列表中每个用户卡片被悬停/获得焦点时，呈现高亮与微放大特效 */
#leaderboard-grid .card {
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
}

#leaderboard-grid .card:hover {
    transform: scale(1.025);
    border-color: var(--accent-color);
    box-shadow: 0 12px 24px -10px rgba(var(--accent-rgb), 0.15);
    z-index: 2;
}

.card-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* --- 仪表盘网格 --- */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 1024px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }
}

/* --- 数据大项展示 --- */
.hero-stat {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin: 0.5rem 0;
}

.hero-number span {
    color: var(--accent-color);
    text-shadow: var(--glow-effect);
}

/* --- 表格样式 --- */
.table-container {
    overflow-x: auto;
    width: 100%;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

th {
    font-family: var(--font-heading);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
}

td {
    color: var(--text-primary);
    font-size: 0.95rem;
}

tr:hover td {
    background: rgba(var(--accent-rgb), 0.02);
}

/* --- 按钮与表单 --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.2rem;
    border-radius: calc(var(--border-radius) / 2);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background: var(--accent-color);
    color: #ffffff;
    box-shadow: var(--glow-effect);
}

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

.btn-secondary {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-primary);
}

[data-theme="style-a"] .btn-secondary, [data-theme="style-b"] .btn-secondary {
    background: rgba(255, 255, 255, 0.05);
}

.btn-secondary:hover {
    background: rgba(0, 0, 0, 0.1);
}

.form-control {
    width: 100%;
    padding: 0.6rem 1rem;
    border-radius: calc(var(--border-radius) / 2);
    border: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.02);
    color: var(--text-primary);
    font-family: var(--font-body);
    outline: none;
}

[data-theme="style-a"] .form-control, [data-theme="style-b"] .form-control {
    background: rgba(255, 255, 255, 0.02);
}

.form-control:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(var(--accent-rgb), 0.2);
}

/* 徽章 Badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success-color);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger-color);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning-color);
}

/* 弹窗 Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    max-width: 480px;
    width: 90%;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-header h3 {
    font-family: var(--font-heading);
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* --- 移动端调试与响应式补充优化 --- */
@media (max-width: 768px) {
    /* 缩小整体边距 */
    .container {
        padding: 0.75rem;
    }
    
    /* 头部导航适配 */
    header {
        padding: 0.75rem 1rem;
        flex-direction: column;
        gap: 0.75rem;
        align-items: center;
        text-align: center;
        justify-content: center;
    }
    
    .brand {
        position: static !important;
    }
    
    .nav-links {
        width: 100%;
        justify-content: center;
        gap: 0.5rem;
        flex-wrap: wrap;
    }
    
    /* 调整卡片内边距 */
    .card {
        padding: 1rem;
    }
    
    /* 大盘看板网格自适应 */
    .grid-3 {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-bottom: 1rem;
    }
    
    /* 主榜单控制头部手机自适应 */
    .leaderboard-ctrl-header {
        flex-direction: column !important;
        align-items: stretch !important;
        text-align: center;
    }
    
    #leaderboard-search {
        width: 100% !important;
    }
    
    /* 主榜单滚动容器高度与内边距缩减 */
    #leaderboard-scroll-container {
        padding: 0.75rem !important;
        height: auto !important;
    }
    
    #leaderboard-grid {
        grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)) !important;
        gap: 0.75rem !important;
    }
    
    /* 用户详情子视图微调 */
    #user-detail-view .grid-3 .hero-stat {
        min-height: auto !important;
        padding: 1rem;
    }
    
    .hero-number {
        font-size: 2.2rem;
    }
    
    /* 表格字体缩放防溢出 */
    table th, table td {
        padding: 0.6rem;
        font-size: 0.8rem;
    }
}