/* ========================================
   程序员技术站 - 赛博朋克科技风格
   Cyberpunk Tech Theme
   ======================================== */

/* === 全局变量 === */
:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.85);
    --bg-card-hover: rgba(22, 30, 45, 0.95);
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6b7280;
    
    --neon-green: #00ff88;
    --neon-blue: #00d4ff;
    --neon-orange: #ff6b35;
    --neon-purple: #a855f7;
    --neon-pink: #ec4899;
    
    --glow-green: 0 0 20px rgba(0, 255, 136, 0.4), 0 0 40px rgba(0, 255, 136, 0.2);
    --glow-blue: 0 0 20px rgba(0, 212, 255, 0.4), 0 0 40px rgba(0, 212, 255, 0.2);
    --glow-orange: 0 0 20px rgba(255, 107, 53, 0.4), 0 0 40px rgba(255, 107, 53, 0.2);
    --glow-purple: 0 0 20px rgba(168, 85, 247, 0.4), 0 0 40px rgba(168, 85, 247, 0.2);
    
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-glow: rgba(0, 255, 136, 0.3);
    
    --font-display: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === 基础重置 === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-display);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* === 背景网格 === */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(0, 255, 136, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 136, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: -1;
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 0%, rgba(0, 255, 136, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(0, 212, 255, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(168, 85, 247, 0.02) 0%, transparent 60%);
    pointer-events: none;
    z-index: -1;
}

/* === 滚动条 === */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--neon-green);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--neon-blue);
}

/* === 容器 === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* === 顶部导航 === */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(10, 14, 23, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    padding: 0 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.nav-brand-icon {
    font-size: 28px;
}

.nav-brand-text {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--neon-green), var(--neon-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
    color: var(--neon-green);
}

.nav-link-icon {
    font-size: 16px;
}

.nav-admin {
    margin-left: 16px;
    padding: 8px 20px;
    background: linear-gradient(135deg, var(--neon-green), var(--neon-blue));
    color: var(--bg-primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
    transition: all var(--transition-fast);
    box-shadow: var(--glow-green);
}

.nav-admin:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 255, 136, 0.6);
}

/* === 页面标题区 === */
.page-header {
    padding: 60px 0 40px;
    text-align: center;
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--neon-green), transparent);
}

.page-icon {
    font-size: 64px;
    margin-bottom: 16px;
    display: block;
}

.page-title {
    font-size: 42px;
    font-weight: 900;
    letter-spacing: 4px;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 300;
    letter-spacing: 2px;
}

.page-decor {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 8px;
    margin-top: 20px;
    opacity: 0.5;
}

/* === 搜索栏 === */
.search-bar {
    margin-bottom: 40px;
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.search-input-wrapper {
    position: relative;
    width: 100%;
    max-width: 400px;
}

.search-input {
    width: 100%;
    padding: 14px 20px 14px 48px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: var(--font-display);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--neon-green);
    box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.1);
}

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

.search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
    color: var(--text-muted);
}

/* === 标签筛选 === */
.filter-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 32px;
}

.filter-tag {
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-tag:hover {
    border-color: var(--neon-green);
    color: var(--text-primary);
}

.filter-tag.active {
    background: var(--neon-green);
    border-color: var(--neon-green);
    color: var(--bg-primary);
    font-weight: 600;
}

/* === 内容网格 === */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

/* === 卡片 === */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 24px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-green), var(--neon-blue));
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 255, 136, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.card:hover::before {
    opacity: 1;
}

.card.green { --card-accent: var(--neon-green); }
.card.blue { --card-accent: var(--neon-blue); }
.card.orange { --card-accent: var(--neon-orange); }
.card.purple { --card-accent: var(--neon-purple); }
.card.pink { --card-accent: var(--neon-pink); }

.card:hover {
    border-color: color-mix(in srgb, var(--card-accent) 30%, transparent);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 
                0 0 30px color-mix(in srgb, var(--card-accent) 15%, transparent);
}

.card-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 16px;
}

.card-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--card-accent), transparent);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    flex-shrink: 0;
}

.card-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.card-subtitle {
    font-size: 12px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.card-tag {
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    font-size: 11px;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.card-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-subtle);
    font-size: 13px;
    color: var(--text-muted);
}

.card-meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.card-meta-item.star {
    color: var(--neon-orange);
}

.card-actions {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.card-btn {
    flex: 1;
    padding: 10px 16px;
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 13px;
    font-family: var(--font-display);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    text-align: center;
}

.card-btn:hover {
    border-color: var(--card-accent, var(--neon-green));
    color: var(--card-accent, var(--neon-green));
}

.card-btn.primary {
    background: var(--card-accent, var(--neon-green));
    border-color: var(--card-accent, var(--neon-green));
    color: var(--bg-primary);
    font-weight: 600;
}

.card-btn.primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* === 评分 === */
.rating {
    display: flex;
    align-items: center;
    gap: 4px;
}

.rating-star {
    color: var(--neon-orange);
}

.rating-value {
    margin-left: 4px;
    font-weight: 600;
    color: var(--text-primary);
}

/* === 排名卡片 === */
.rank-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    transition: all var(--transition-fast);
    margin-bottom: 12px;
}

.rank-card:hover {
    border-color: rgba(0, 255, 136, 0.3);
    transform: translateX(4px);
}

.rank-card.top-3 {
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.1), rgba(0, 212, 255, 0.05));
    border-color: rgba(0, 255, 136, 0.2);
}

.rank-number {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 900;
    font-family: var(--font-mono);
    color: var(--text-muted);
    flex-shrink: 0;
}

.rank-card.top-1 .rank-number { color: #ffd700; }
.rank-card.top-2 .rank-number { color: #c0c0c0; }
.rank-card.top-3 .rank-number { color: #cd7f32; }

.rank-info {
    flex: 1;
}

.rank-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.rank-title-icon {
    font-size: 20px;
}

.rank-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.rank-tags {
    font-size: 11px;
    color: var(--text-muted);
}

.rank-bar-wrapper {
    width: 200px;
    flex-shrink: 0;
}

.rank-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 4px;
}

.rank-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--neon-green), var(--neon-blue));
    border-radius: 4px;
    transition: width 1s ease-out;
}

.rank-percent {
    font-size: 14px;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--neon-green);
}

.rank-change {
    font-size: 12px;
    margin-left: 8px;
}

.rank-change.up { color: var(--neon-green); }
.rank-change.down { color: #ef4444; }
.rank-change.same { color: var(--text-muted); }

/* === 趋势图 === */
.trend-chart {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 32px;
}

.trend-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.chart-placeholder {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 19px,
        rgba(255, 255, 255, 0.03) 19px,
        rgba(255, 255, 255, 0.03) 20px
    ),
    repeating-linear-gradient(
        90deg,
        transparent,
        transparent 39px,
        rgba(255, 255, 255, 0.03) 39px,
        rgba(255, 255, 255, 0.03) 40px
    );
    border-radius: 8px;
}

/* === 页脚 === */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-subtle);
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--neon-green);
}

.footer-copy {
    font-size: 13px;
    color: var(--text-muted);
}

.footer-decor {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
    opacity: 0.5;
    margin-top: 12px;
    letter-spacing: 2px;
}

/* === 空状态 === */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 64px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-text {
    font-size: 16px;
}

/* === 加载状态 === */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-subtle);
    border-top-color: var(--neon-green);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* === 动画 === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.5s ease-out forwards;
}

.animate-delay-1 { animation-delay: 0.1s; opacity: 0; }
.animate-delay-2 { animation-delay: 0.2s; opacity: 0; }
.animate-delay-3 { animation-delay: 0.3s; opacity: 0; }
.animate-delay-4 { animation-delay: 0.4s; opacity: 0; }

/* === 响应式 === */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .page-title {
        font-size: 28px;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .rank-card {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .rank-bar-wrapper {
        width: 100%;
    }
    
    .card-actions {
        flex-direction: column;
    }
}

/* === 工具类 === */
.text-center { text-align: center; }
.text-green { color: var(--neon-green); }
.text-blue { color: var(--neon-blue); }
.text-orange { color: var(--neon-orange); }
.mb-0 { margin-bottom: 0; }
.mb-20 { margin-bottom: 20px; }
.mb-40 { margin-bottom: 40px; }
.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }