/* ============================================================
   全局 CSS 变量 & 主题 - 个人网站导航
   ============================================================ */

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

/* ─── 亮色主题 ──────────────────────────────────────────────── */
:root {
    --bg-primary: #f7f8fa;
    --bg-secondary: rgba(255, 255, 255, 0.65);
    --bg-card: rgba(255, 255, 255, 0.6);
    --bg-card-hover: rgba(255, 255, 255, 0.85);
    --bg-header: rgba(247, 248, 250, 0.8);
    --bg-overlay: rgba(255, 255, 255, 0.45);

    --text-primary: #1e2028;
    --text-secondary: #4a5568;
    --text-muted: #8993a4;
    --text-accent: #2563eb;

    --border-color: rgba(226, 232, 240, 0.8);
    --border-focus: rgba(37, 99, 235, 0.5);

    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.05),
        0 1px 4px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 12px 40px rgba(37, 99, 235, 0.12),
        0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-header: 0 1px 12px rgba(0, 0, 0, 0.06);

    --blur-glass: blur(20px);
    --blur-header: blur(24px);

    --accent: #2563eb;
    --accent-gradient: linear-gradient(135deg, #1d4ed8 0%, #2563eb 50%, #3b82f6 100%);
    --accent-glow: rgba(37, 99, 235, 0.25);

    --radius-card: 16px;
    --radius-btn: 12px;
    --radius-input: 12px;

    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

    /* 背景渐变 */
    --bg-gradient: linear-gradient(135deg, #dbeafe 0%, #eff6ff 40%, #f0f9ff 70%, #f7f8fa 100%);
}

/* ─── 暗色主题 ──────────────────────────────────────────────── */
[data-theme="dark"] {
    --bg-primary: #12141a;
    --bg-secondary: rgba(24, 28, 38, 0.7);
    --bg-card: rgba(26, 30, 42, 0.6);
    --bg-card-hover: rgba(34, 38, 52, 0.85);
    --bg-header: rgba(18, 20, 26, 0.85);
    --bg-overlay: rgba(18, 22, 32, 0.4);

    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-accent: #60a5fa;

    --border-color: rgba(51, 65, 85, 0.6);
    --border-focus: rgba(59, 130, 246, 0.5);

    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25),
        0 1px 6px rgba(0, 0, 0, 0.15);
    --shadow-card-hover: 0 12px 40px rgba(59, 130, 246, 0.15),
        0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-header: 0 1px 12px rgba(0, 0, 0, 0.3);

    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #162032 30%, #111827 60%, #12141a 100%);
}

/* ─── Reset & Base ────────────────────────────────────────── */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background-color var(--transition), color var(--transition);
    overflow-x: hidden;
}

/* ─── 背景装饰 ─────────────────────────────────────────────── */
.bg-wrapper {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
}

.bg-gradient {
    position: absolute;
    inset: 0;
    background: var(--bg-gradient);
    opacity: 0.5;
}

[data-theme="dark"] .bg-gradient {
    opacity: 0.4;
}

.bg-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    animation: orbFloat 8s ease-in-out infinite alternate;
}

.bg-orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.bg-orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
    bottom: -150px;
    right: -150px;
    animation-delay: -4s;
}

.bg-orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.06) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -2s;
}

@keyframes orbFloat {
    0% {
        transform: translate(0, 0) scale(1);
    }

    100% {
        transform: translate(30px, -30px) scale(1.05);
    }
}

/* ─── Header ──────────────────────────────────────────────── */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-header);
    backdrop-filter: var(--blur-header);
    -webkit-backdrop-filter: var(--blur-header);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-header);
    transition: background var(--transition), box-shadow var(--transition);
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 32px;
    height: 60px;
    display: flex;
    align-items: center;
    gap: 24px;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
    transition: opacity var(--transition);
}

.header-logo:hover {
    opacity: 0.8;
}

.logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    object-fit: contain;
    flex-shrink: 0;
}

.logo-text {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    -webkit-text-fill-color: var(--text-primary);
    background: none;
    -webkit-background-clip: unset;
    background-clip: unset;
}

.header-search {
    flex: 1;
    max-width: 420px;
    margin: 0 auto;
    position: relative;
}

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 14px;
    pointer-events: none;
    transition: color var(--transition);
}

.search-input {
    width: 100%;
    padding: 9px 16px 9px 40px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    backdrop-filter: var(--blur-glass);
    -webkit-backdrop-filter: var(--blur-glass);
    color: var(--text-primary);
    font-size: 13px;
    font-family: inherit;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.search-input::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

.search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    background: var(--bg-card-hover);
}

.search-input:focus~.search-icon {
    color: var(--accent);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.btn-icon {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid transparent;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--text-muted);
    transition: all var(--transition);
    text-decoration: none;
}

.btn-icon:hover {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
    transform: translateY(-1px);
}

/* ─── Main Layout ────────────────────────────────────────── */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 32px 24px 80px;
}

/* ─── Group Section ──────────────────────────────────────── */
.group-section {
    margin-bottom: 40px;
}

.group-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.group-icon {
    font-size: 20px;
    line-height: 1;
}

.group-name {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
}

.group-count {
    font-size: 12px;
    color: var(--text-muted);
    background: var(--bg-overlay);
    padding: 2px 8px;
    border-radius: 20px;
    margin-left: auto;
}

/* ─── Site Grid ──────────────────────────────────────────── */
.site-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

/* ─── Site Card (玻璃拟态) ───────────────────────────────── */
.site-card {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    border-radius: var(--radius-card);
    background: var(--bg-card);
    backdrop-filter: var(--blur-glass);
    -webkit-backdrop-filter: var(--blur-glass);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.site-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15) 0%, transparent 60%);
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition);
}

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

.site-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px) scale(1.01);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--accent);
}

.site-favicon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    flex-shrink: 0;
    object-fit: contain;
    background: var(--bg-overlay);
    border: 1px solid var(--border-color);
    padding: 5px;
}

.site-favicon-fallback {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    flex-shrink: 0;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    letter-spacing: -1px;
}

.site-info {
    flex: 1;
    min-width: 0;
}

.site-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 4px;
    transition: color var(--transition);
}

.site-card:hover .site-title {
    color: var(--text-accent);
}

.site-desc {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.4;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* ─── Empty State ─────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 64px;
    margin-bottom: 16px;
    opacity: 0.4;
}

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

/* ─── Footer ──────────────────────────────────────────────── */
.app-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px 24px;
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    background: var(--bg-header);
    backdrop-filter: var(--blur-header);
    -webkit-backdrop-filter: var(--blur-header);
    border-top: 1px solid var(--border-color);
}

/* ─── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 3px;
    opacity: 0.5;
}

/* ─── Loading Skeleton ─────────────────────────────────────── */
.skeleton {
    background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card-hover) 50%, var(--bg-card) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-card);
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

/* ─── Animations ────────────────────────────────────────────── */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.group-section {
    animation: fadeInUp 0.4s ease both;
}

.group-section:nth-child(1) {
    animation-delay: 0.05s;
}

.group-section:nth-child(2) {
    animation-delay: 0.10s;
}

.group-section:nth-child(3) {
    animation-delay: 0.15s;
}

.group-section:nth-child(4) {
    animation-delay: 0.20s;
}

.group-section:nth-child(5) {
    animation-delay: 0.25s;
}

.group-section:nth-child(n+6) {
    animation-delay: 0.30s;
}

/* ─── Theme Transition ─────────────────────────────────────── */
body,
.app-header,
.site-card,
.search-input,
.btn-icon {
    transition: background var(--transition), color var(--transition),
        border-color var(--transition), box-shadow var(--transition);
}

/* ─── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
    .header-inner {
        padding: 0 16px;
        gap: 12px;
        height: 52px;
    }

    .logo-text {
        display: none;
    }

    .logo-icon {
        width: 28px;
        height: 28px;
    }

    .header-search {
        max-width: none;
    }

    .main-content {
        padding: 20px 16px 70px;
    }

    .site-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 12px;
    }

    .site-card {
        padding: 12px;
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 8px;
    }

    .site-desc {
        display: none;
    }
}

@media (max-width: 480px) {
    .site-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ─── 搜索高亮 ─────────────────────────────────────────────── */
mark {
    background: rgba(37, 99, 235, 0.25);
    color: var(--accent);
    border-radius: 3px;
    padding: 0 2px;
}