/* ============================================
   提示词收藏分享 - 主样式表
   ============================================ */

/* CSS 变量 - 亮色模式 */
:root {
    --bg-primary: #f5f7fa;
    --bg-card: #fff;
    --bg-input: #fff;
    --bg-code: #f8f9fa;
    --text-primary: #333;
    --text-secondary: #555;
    --text-muted: #888;
    --text-light: #999;
    --border-color: #e0e0e0;
    --border-light: #eee;
    --border-lighter: #f0f0f0;
    --border-faint: #f5f5f5;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 2px 12px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --shadow-hover: 0 8px 24px rgba(0,0,0,0.12);
    --accent: #667eea;
    --accent-hover: #5a6fd6;
    --accent-bg: #f0f0ff;
    --success: #28a745;
    --danger: #dc3545;
    --header-bg: #fff;
    --footer-bg: #fff;
    --modal-overlay: rgba(0,0,0,0.5);
    --placeholder-bg: #e8eaed;
    --switch-bg: #ccc;
    --badge-success-bg: #d4edda;
    --badge-success-text: #155724;
    --badge-warning-bg: #fff3cd;
    --badge-warning-text: #856404;
    --stat-card-bg: #fff;
    --stat-card-border: #eee;
    --trend-border: #eee;
    --ad-label: #bbb;
    --sort-tab-bg: #fff;
    --sort-tab-text: #666;
    --faq-bg: #f8f9fc;
}

/* 深色模式 */
[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-card: #16213e;
    --bg-input: #1a1a2e;
    --bg-code: #0f3460;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0c0;
    --text-muted: #8888aa;
    --text-light: #7777aa;
    --border-color: #2a2a4a;
    --border-light: #2a2a4a;
    --border-lighter: #222244;
    --border-faint: #1e1e3a;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 2px 12px rgba(0,0,0,0.3);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.4);
    --shadow-hover: 0 8px 24px rgba(0,0,0,0.5);
    --accent: #7c8cf8;
    --accent-hover: #6a7ae6;
    --accent-bg: #1e1e4a;
    --header-bg: #16213e;
    --footer-bg: #16213e;
    --modal-overlay: rgba(0,0,0,0.7);
    --placeholder-bg: #0f3460;
    --switch-bg: #444;
    --badge-success-bg: #1a3a2a;
    --badge-success-text: #66cc88;
    --badge-warning-bg: #3a3a1a;
    --badge-warning-text: #ccaa44;
    --stat-card-bg: #16213e;
    --stat-card-border: #2a2a4a;
    --trend-border: #2a2a4a;
    --ad-label: #555;
    --sort-tab-bg: #16213e;
    --sort-tab-text: #b0b0c0;
    --faq-bg: #1a1a3e;
}

/* Reset & Base */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    background: var(--bg-primary); color: var(--text-primary); line-height: 1.6; min-height: 100vh;
    transition: background 0.3s, color 0.3s;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ============================================
   Header
   ============================================ */
.site-header {
    background: var(--header-bg); box-shadow: var(--shadow-md);
    position: sticky; top: 0; z-index: 1000;
    transition: background 0.3s;
}
.site-header .container {
    display: flex; align-items: center;
    height: 60px; gap: 12px;
}
.logo { font-size: 20px; font-weight: 700; color: var(--text-primary); white-space: nowrap; }
.logo:hover { color: var(--accent); }
.main-nav { display: flex; gap: 4px; flex-wrap: wrap; flex: 1; justify-content: flex-start; }
.main-nav a { color: var(--text-secondary); padding: 6px 12px; border-radius: 6px; font-size: 14px; transition: all 0.2s; }
.main-nav a:hover { background: var(--accent-bg); color: var(--accent); }
.header-actions { display: flex; align-items: center; gap: 12px; white-space: nowrap; flex-shrink: 0; }

/* ==========================================
   Desktop Search Box (in header)
   ========================================== */
.desktop-search { display: none; }
@media (min-width: 1024px) {
    .desktop-search { display: block; }
    .header-actions .login-btn { display: inline-flex; }
}
.header-search-form {
    display: flex; align-items: center; margin: 0;
}
.desktop-search .header-search-form input {
    width: 180px; padding: 6px 12px; border: 2px solid var(--border-color);
    border-radius: 8px 0 0 8px; font-size: 13px; background: var(--bg-primary);
    color: var(--text-primary); outline: none; transition: border-color 0.2s;
}
.desktop-search .header-search-form input:focus { border-color: var(--accent); width: 220px; }
.desktop-search .header-search-form button {
    padding: 6px 12px; border: 2px solid var(--border-color); border-left: none;
    border-radius: 0 8px 8px 0; background: var(--bg-primary); cursor: pointer;
    color: var(--text-muted); display: flex; align-items: center;
    transition: color 0.2s;
}
.desktop-search .header-search-form button:hover { color: var(--accent); }

/* ==========================================
   Mobile Search Button (header icon)
   ========================================== */
.mobile-search-btn { display: none; background: none; border: none; cursor: pointer; color: var(--text-muted); padding: 6px; border-radius: 6px; }
.mobile-search-btn:hover { background: var(--accent-bg); color: var(--accent); }

/* ==========================================
   Mobile Search Bar (popup)
   ========================================== */
.mobile-search-bar { display: none; background: var(--bg-card); border-bottom: 1px solid var(--border-light); padding: 10px 0; box-shadow: var(--shadow-sm); z-index: 999; }
.mobile-search-bar.active { display: block; }
.mobile-search-bar .container { display: flex; align-items: center; gap: 10px; }
.mobile-search-inner { flex: 1; display: flex; align-items: center; }
.mobile-search-inner input { flex: 1; padding: 10px 14px; border: 2px solid var(--border-color); border-radius: 8px 0 0 8px; font-size: 15px; background: var(--bg-input); color: var(--text-primary); outline: none; }
.mobile-search-inner input:focus { border-color: var(--accent); }
.mobile-search-inner button { padding: 10px 14px; border: 2px solid var(--border-color); border-left: none; border-radius: 0 8px 8px 0; background: var(--bg-input); cursor: pointer; color: var(--text-muted); display: flex; align-items: center; }
.mobile-search-inner button:hover { color: var(--accent); }
.mobile-search-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-muted); padding: 4px 8px; line-height: 1; flex-shrink: 0; }
.mobile-search-close:hover { color: var(--text-primary); }

/* ==========================================
   Hamburger Icon
   ========================================== */
.hamburger-icon { display: flex; flex-direction: column; gap: 4px; width: 22px; height: 18px; justify-content: center; }
.hamburger-line { display: block; width: 100%; height: 2px; background: var(--text-secondary); border-radius: 2px; transition: all 0.3s; }

/* ==========================================
   Mobile Nav - Slideout Sidebar
   ========================================== */
.mobile-nav-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); z-index: 1999; }
.mobile-nav-overlay.active { display: block; }

.mobile-nav { display: block; position: fixed; top: 0; right: -100%; width: 85%; max-width: 340px; height: 100vh; background: var(--bg-card); box-shadow: var(--shadow-lg); z-index: 2000; overflow-y: auto; transition: right 0.3s ease; padding-bottom: 20px; -webkit-overflow-scrolling: touch; }
.mobile-nav.active { right: 0; }
.mobile-nav-header { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; border-bottom: 1px solid var(--border-light); font-size: 16px; font-weight: 600; color: var(--text-primary); position: sticky; top: 0; background: var(--bg-card); z-index: 1; }
.mobile-nav-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-muted); padding: 4px; line-height: 1; }
.mobile-nav-close:hover { color: var(--text-primary); }

.mobile-search-form { padding: 12px 20px; border-bottom: 1px solid var(--border-light); }
.mobile-search-form form { display: flex; gap: 8px; }
.mobile-search-form input { flex: 1; padding: 10px 14px; border: 2px solid var(--border-color); border-radius: 8px; font-size: 14px; background: var(--bg-input); color: var(--text-primary); outline: none; }
.mobile-search-form input:focus { border-color: var(--accent); }
.mobile-search-form button { padding: 10px 16px; background: var(--accent); color: #fff; border: none; border-radius: 8px; font-size: 14px; cursor: pointer; white-space: nowrap; }

.mobile-user-info { display: flex; align-items: center; gap: 10px; padding: 12px 20px; border-bottom: 1px solid var(--border-light); font-size: 14px; color: var(--text-primary); font-weight: 500; }
.mobile-nav-btn { display: block; margin: 12px 20px; padding: 12px; text-align: center; background: var(--accent); color: #fff; border-radius: 8px; font-size: 14px; font-weight: 500; transition: background 0.2s; }
.mobile-nav-btn:hover { background: var(--accent-hover); color: #fff; }

.mobile-nav-section { padding: 8px 0; border-bottom: 1px solid var(--border-faint); }
.mobile-nav-section:last-child { border-bottom: none; }
.mobile-nav-section-title { padding: 8px 20px 4px; font-size: 12px; color: var(--text-light); text-transform: uppercase; letter-spacing: 1px; }
.mobile-nav-section a { display: block; padding: 12px 20px; color: var(--text-secondary); font-size: 14px; transition: background 0.2s; }
.mobile-nav-section a:hover, .mobile-nav-section a:active { background: var(--accent-bg); color: var(--accent); }
.mobile-nav-logout { color: var(--danger) !important; }

/* ==========================================
   Visibility helpers
   ========================================== */
.desktop-only { display: inline; }
.mobile-only { display: none; }
.login-btn { display: none; }

/* Dark mode toggle */
.dark-toggle {
    background: none; border: none; cursor: pointer; font-size: 18px;
    color: var(--text-muted); padding: 4px 8px; border-radius: 6px; transition: all 0.2s;
}
.dark-toggle:hover { background: var(--accent-bg); color: var(--accent); }
.dark-toggle .icon-sun { display: none; }
.dark-toggle .icon-moon { display: block; }
[data-theme="dark"] .dark-toggle .icon-sun { display: block; }
[data-theme="dark"] .dark-toggle .icon-moon { display: none; }

/* User Menu Dropdown */
.user-menu { display: flex; align-items: center; gap: 10px; }
.dropdown { position: relative; }
.dropdown-toggle {
    display: flex; align-items: center; gap: 8px; background: none; border: none;
    cursor: pointer; padding: 4px 8px; border-radius: 8px; font-size: 14px; color: var(--text-primary);
}
.dropdown-toggle:hover { background: var(--bg-primary); }
.dropdown-menu {
    display: none; position: absolute; right: 0; top: 100%; background: var(--bg-card);
    border-radius: 8px; box-shadow: var(--shadow-lg); min-width: 160px;
    padding: 8px 0; z-index: 1001; border: 1px solid var(--border-light);
}
.dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a {
    display: block; padding: 8px 16px; color: var(--text-secondary); font-size: 14px; transition: background 0.2s;
}
.dropdown-menu a:hover { background: var(--accent-bg); color: var(--accent); }

/* Mobile Menu Toggle (Hamburger) */
.mobile-menu-toggle {
    display: none; background: none; border: none; cursor: pointer;
    padding: 8px; border-radius: 8px; -webkit-tap-highlight-color: transparent;
}
.mobile-menu-toggle:active { background: var(--accent-bg); }

/* Header responsive defaults */
.header-actions .btn { display: none; }
.header-actions .user-menu .btn { display: inline-block; }


/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-block; padding: 10px 20px; border-radius: 8px; border: none;
    font-size: 14px; cursor: pointer; transition: all 0.2s; text-align: center;
    font-weight: 500; line-height: 1.4;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; }
.btn-outline { background: var(--bg-card); color: var(--accent); border: 2px solid var(--accent); }
.btn-outline:hover { background: var(--accent); color: #fff; }
.btn-danger { background: var(--bg-card); color: var(--danger); border: 2px solid var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #218838; color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-block { display: block; width: 100%; }

/* ============================================
   Avatars
   ============================================ */
.avatar-xs { width: 22px; height: 22px; border-radius: 50%; object-fit: cover; vertical-align: middle; }
.avatar-sm { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }
.avatar-preview { width: 80px; height: 80px; border-radius: 50%; object-fit: cover; border: 3px solid var(--border-light); }

/* ============================================
   Alerts
   ============================================ */
.alert {
    padding: 12px 16px; border-radius: 8px; margin-bottom: 16px;
    font-size: 14px; display: flex; justify-content: space-between; align-items: center;
}
.alert-success { background: #f0fff4; color: var(--success); border: 1px solid #c3e6cb; }
.alert-error { background: #fff3f3; color: var(--danger); border: 1px solid #ffc9c9; }
[data-theme="dark"] .alert-success { background: #1a3a2a; border-color: #2a5a3a; }
[data-theme="dark"] .alert-error { background: #3a1a1a; border-color: #5a2a2a; }
.alert-close { background: none; border: none; font-size: 20px; cursor: pointer; color: inherit; opacity: 0.6; }
.alert-close:hover { opacity: 1; }

/* ============================================
   Badges
   ============================================ */
.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 12px; font-weight: 500; }
.badge-success { background: var(--badge-success-bg); color: var(--badge-success-text); }
.badge-warning { background: var(--badge-warning-bg); color: var(--badge-warning-text); }
.badge-primary { background: var(--accent-bg); color: var(--accent); }
.badge-default { background: var(--border-light); color: var(--text-muted); }

/* ============================================
   Toolbar (Sort & Filter)
   ============================================ */
.toolbar { margin-bottom: 20px; }
.sort-tabs { display: flex; gap: 4px; margin-bottom: 12px; flex-wrap: wrap; }
.sort-tab {
    padding: 8px 16px; border-radius: 20px; font-size: 13px; color: var(--sort-tab-text);
    background: var(--sort-tab-bg); transition: all 0.2s; border: 1px solid var(--border-color);
}
.sort-tab:hover { color: var(--accent); border-color: var(--accent); }
.sort-tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.category-filter { display: flex; gap: 4px; flex-wrap: wrap; }
.cat-link {
    padding: 6px 14px; border-radius: 16px; font-size: 13px; color: var(--sort-tab-text);
    background: var(--sort-tab-bg); border: 1px solid var(--border-color); transition: all 0.2s;
}
.cat-link:hover, .cat-link.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ============================================
   Masonry Grid
   ============================================ */
.masonry-grid {
    columns: 4; column-gap: 16px; margin-bottom: 24px;
}
.masonry-item {
    break-inside: avoid; margin-bottom: 16px;
}
.card {
    background: var(--bg-card); border-radius: 12px; overflow: hidden; display: block;
    box-shadow: var(--shadow-sm); transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.card:active { transform: translateY(-2px); }
.card-image {
    position: relative; width: 100%; overflow: hidden; background: var(--placeholder-bg);
}
.card-image img { width: 100%; display: block; transition: transform 0.3s; }
.card:hover .card-image img { transform: scale(1.05); }
.card-image-placeholder {
    width: 100%; padding-top: 60%; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #667eea, #764ba2); color: #fff; font-size: 32px; font-weight: 700;
}
.private-badge {
    position: absolute; top: 8px; right: 8px; background: rgba(0,0,0,0.6);
    color: #fff; padding: 2px 8px; border-radius: 4px; font-size: 12px;
}
.card-body { padding: 14px; }
.card-title {
    font-size: 15px; font-weight: 600; color: var(--text-primary); margin-bottom: 8px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
    line-height: 1.5;
}
.card-meta { display: flex; gap: 10px; font-size: 12px; color: var(--text-light); flex-wrap: wrap; align-items: center; }
.card-actions { display: flex; gap: 6px; margin-top: 10px; flex-wrap: wrap; }

/* ============================================
   Pagination
   ============================================ */
.pagination { margin: 24px 0; text-align: center; }
.pagination ul { display: inline-flex; list-style: none; gap: 4px; }
.pagination li a, .pagination li span {
    display: block; padding: 8px 14px; border-radius: 6px; font-size: 14px;
    background: var(--bg-card); color: var(--text-secondary); border: 1px solid var(--border-color); transition: all 0.2s;
}
.pagination li a:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.pagination li.active a { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ============================================
   Empty State
   ============================================ */
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-light); }
.empty-state p { font-size: 16px; margin-bottom: 16px; }

/* ============================================
   Auth Pages
   ============================================ */
.auth-page { display: flex; align-items: center; justify-content: center; min-height: calc(100vh - 60px); padding: 40px 20px; }
.auth-container { background: var(--bg-card); border-radius: 16px; padding: 40px; max-width: 440px; width: 100%; box-shadow: var(--shadow-lg); }
.auth-container h2 { text-align: center; margin-bottom: 24px; color: var(--text-primary); }
.auth-form .form-group { margin-bottom: 16px; }
.auth-links { text-align: center; margin-top: 20px; font-size: 14px; color: var(--text-light); }
.auth-links span { margin: 0 8px; color: var(--border-color); }
.captcha-group .captcha-row { display: flex; gap: 10px; align-items: center; }
.captcha-img { height: 42px; border-radius: 6px; cursor: pointer; border: 1px solid var(--border-color); }

/* ============================================
   Forms
   ============================================ */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 14px; font-weight: 500; color: var(--text-secondary); }
.form-group small { display: block; margin-top: 4px; font-size: 12px; color: var(--text-light); }
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group input[type="url"],
.form-group input[type="file"],
.form-group select,
.form-group textarea {
    width: 100%; padding: 10px 14px; border: 2px solid var(--border-color); border-radius: 8px;
    font-size: 14px; font-family: inherit; transition: border-color 0.2s;
    background: var(--bg-input); color: var(--text-primary);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: var(--accent);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-group select { cursor: pointer; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.checkbox-label { display: flex; align-items: center; gap: 8px; cursor: pointer; font-weight: 400 !important; }
.checkbox-label input[type="checkbox"] { width: auto; }

/* ============================================
   Prompt Detail
   ============================================ */
.prompt-detail { max-width: 800px; margin: 0 auto; padding: 30px 0; }
.prompt-main { background: var(--bg-card); border-radius: 16px; padding: 30px; margin-bottom: 30px; box-shadow: var(--shadow-md); }
.prompt-featured-image { margin: -30px -30px 20px -30px; border-radius: 16px 16px 0 0; overflow: hidden; }
.prompt-featured-image img { width: 100%; display: block; }

.prompt-gallery { margin: -30px -30px 20px -30px; }
.gallery-main { width: 100%; overflow: hidden; background: var(--placeholder-bg); border-radius: 16px 16px 0 0; }
.gallery-main img { width: 100%; max-height: 500px; object-fit: cover; display: block; }
.gallery-thumbs { display: flex; gap: 8px; padding: 12px; background: var(--bg-card); overflow-x: auto; border-bottom: 1px solid var(--border-lighter); }
.gallery-thumb { flex-shrink: 0; width: 90px; height: 70px; border-radius: 6px; overflow: hidden; cursor: pointer; border: 2px solid transparent; transition: border-color 0.2s; }
.gallery-thumb:hover { border-color: var(--accent); }
.gallery-thumb.active { border-color: var(--accent); }
.gallery-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

.image-gallery { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 12px; }
.image-gallery-item { position: relative; width: 120px; height: 120px; border-radius: 8px; overflow: hidden; background: var(--placeholder-bg); }
.image-gallery-item img { width: 100%; height: 100%; object-fit: cover; }
.image-delete-form { position: absolute; top: 4px; right: 4px; }
.image-delete-btn { width: 24px; height: 24px; border-radius: 50%; background: rgba(0,0,0,0.6); color: #fff; border: none; cursor: pointer; font-size: 12px; line-height: 1; display: flex; align-items: center; justify-content: center; }
.image-delete-btn:hover { background: var(--danger); }

.prompt-intro { margin-bottom: 20px; }
.prompt-intro h3 { font-size: 16px; color: var(--text-primary); margin-bottom: 10px; }

.prompt-title { font-size: 24px; font-weight: 700; color: var(--text-primary); margin-bottom: 16px; line-height: 1.4; }
.prompt-meta { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border-lighter); }
.meta-left, .meta-right { display: flex; align-items: center; gap: 14px; font-size: 13px; color: var(--text-muted); }
.meta-author { display: flex; align-items: center; gap: 6px; }
.prompt-taxonomy { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.taxonomy-item { font-size: 13px; padding: 4px 12px; border-radius: 16px; }
.category-badge { background: var(--accent-bg); color: var(--accent); }
.tag-badge { background: var(--border-light); color: var(--text-muted); }
.prompt-content, .prompt-usage { margin-bottom: 24px; }
.prompt-content h3, .prompt-usage h3 { font-size: 16px; color: var(--text-primary); margin-bottom: 10px; }
.content-box {
    background: var(--bg-code); border-radius: 8px; padding: 16px; font-size: 14px;
    line-height: 1.8; word-break: break-word; border: 1px solid var(--border-light);
}
.prompt-actions { display: flex; gap: 12px; padding-top: 16px; border-top: 1px solid var(--border-lighter); flex-wrap: wrap; }
.action-btn {
    padding: 10px 20px; border-radius: 8px; border: 2px solid var(--border-color); background: var(--bg-card);
    cursor: pointer; font-size: 14px; transition: all 0.2s; color: var(--text-muted);
}
.action-btn:hover { border-color: var(--accent); color: var(--accent); }
.action-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.action-btn.active:hover { background: var(--accent-hover); }

/* Related Prompts */
.related-prompts { background: var(--bg-card); border-radius: 16px; padding: 24px; box-shadow: var(--shadow-md); }
.related-prompts h3 { font-size: 18px; margin-bottom: 16px; color: var(--text-primary); }
.related-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.related-card { border-radius: 8px; overflow: hidden; background: var(--bg-code); transition: transform 0.2s; }
.related-card:hover { transform: translateY(-2px); }
.related-card-image { width: 100%; padding-top: 60%; position: relative; overflow: hidden; background: var(--placeholder-bg); }
.related-card-image img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; }
.related-card-title { padding: 8px 10px; font-size: 12px; color: var(--text-secondary); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; line-height: 1.5; }

/* Touch-friendly action buttons */
.action-btn {
    min-height: 44px; display: inline-flex; align-items: center; justify-content: center;
    -webkit-tap-highlight-color: transparent;
}
.action-btn:active { transform: scale(0.98); }

/* ============================================
   Modal
   ============================================ */
.modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 2000; align-items: center; justify-content: center; }
.modal-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: var(--modal-overlay); }
.modal-content { background: var(--bg-card); border-radius: 12px; padding: 24px; max-width: 480px; width: 90%; position: relative; z-index: 2001; }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.modal-header h3 { font-size: 18px; }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-light); }
.modal-close:hover { color: var(--text-primary); }

/* ============================================
   User Profile Layout
   ============================================ */
.user-profile-page { display: grid; grid-template-columns: 240px 1fr; gap: 24px; padding: 30px 0; }
.user-sidebar { position: sticky; top: 80px; }
.user-card {
    background: var(--bg-card); border-radius: 12px; padding: 24px; text-align: center;
    margin-bottom: 16px; box-shadow: var(--shadow-sm);
}
.user-avatar-large { width: 80px; height: 80px; border-radius: 50%; overflow: hidden; margin: 0 auto 12px; border: 3px solid var(--border-light); }
.user-avatar-large img { width: 100%; height: 100%; object-fit: cover; }
.user-card h3 { font-size: 18px; margin-bottom: 4px; color: var(--text-primary); }
.user-username { font-size: 13px; color: var(--text-light); margin-bottom: 8px; }
.user-email-status { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; word-break: break-all; }
.user-role { font-size: 12px; color: var(--accent); font-weight: 500; }
.user-nav { background: var(--bg-card); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-sm); }
.user-nav a {
    display: block; padding: 12px 20px; color: var(--text-secondary); font-size: 14px;
    border-bottom: 1px solid var(--border-faint); transition: all 0.2s;
    border-left: 3px solid transparent;
}
.user-nav a:last-child { border-bottom: none; }
.user-nav a:hover, .user-nav a.active { background: var(--accent-bg); color: var(--accent); border-left-color: var(--accent); }
.user-content { background: var(--bg-card); border-radius: 12px; padding: 24px; box-shadow: var(--shadow-sm); }
.user-content h2 { margin-bottom: 20px; font-size: 20px; color: var(--text-primary); }
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.page-header h2 { margin-bottom: 0; }
.section { margin-bottom: 30px; padding-bottom: 30px; border-bottom: 1px solid var(--border-lighter); }
.section:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.section h3 { font-size: 16px; margin-bottom: 16px; color: var(--text-primary); }
.avatar-upload { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.avatar-clickable { position: relative; cursor: pointer; border-radius: 50%; overflow: hidden; display: inline-block; }
.avatar-clickable:hover .avatar-overlay { opacity: 1; }
.avatar-overlay {
    position: absolute; inset: 0; background: rgba(0,0,0,0.5);
    display: flex; align-items: center; justify-content: center;
    color: #fff; opacity: 0; transition: opacity 0.2s; border-radius: 50%;
}

/* ============================================
   Admin Layout
   ============================================ */
.admin-page { display: grid; grid-template-columns: 200px 1fr; gap: 24px; padding: 30px 0; }
.admin-sidebar { position: sticky; top: 80px; }
.admin-sidebar h3 { font-size: 16px; margin-bottom: 12px; color: var(--text-primary); }
.admin-nav { background: var(--bg-card); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-sm); }
.admin-nav a {
    display: block; padding: 12px 20px; color: var(--text-secondary); font-size: 14px;
    border-bottom: 1px solid var(--border-faint); transition: all 0.2s;
    border-left: 3px solid transparent;
}
.admin-nav a:last-child { border-bottom: none; }
.admin-nav a:hover, .admin-nav a.active { background: var(--accent-bg); color: var(--accent); border-left-color: var(--accent); }
.admin-content { background: var(--bg-card); border-radius: 12px; padding: 24px; box-shadow: var(--shadow-sm); }
.admin-section { margin-bottom: 30px; padding-bottom: 30px; border-bottom: 1px solid var(--border-lighter); }
.admin-section:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.admin-section h3 { font-size: 16px; margin-bottom: 16px; color: var(--text-primary); }
.admin-section h4 { font-size: 14px; margin-bottom: 12px; color: var(--text-secondary); }

/* Admin Table - with horizontal scroll on mobile */
.admin-table-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 600px; }
.admin-table th, .admin-table td {
    padding: 12px; text-align: left; border-bottom: 1px solid var(--border-lighter); color: var(--text-primary);
    white-space: nowrap;
}
.admin-table th { font-weight: 600; color: var(--text-secondary); background: var(--bg-code); white-space: nowrap; position: sticky; top: 0; }
.admin-table tr:hover td { background: var(--accent-bg); }
.admin-table .btn { padding: 4px 10px; font-size: 12px; min-height: auto; }

/* ============================================
   Footer
   ============================================ */
.site-footer { background: var(--footer-bg); padding: 20px; text-align: center; color: var(--text-light); font-size: 13px; border-top: 1px solid var(--border-light); margin-top: 40px; }
.footer-links { margin-bottom: 10px; }
.footer-links a { color: var(--text-muted); font-size: 13px; transition: color 0.2s; }
.footer-links a:hover { color: var(--accent); }
.footer-divider { color: var(--border-color); margin: 0 8px; }

/* ============================================
   Static Pages
   ============================================ */
.static-page { background: var(--bg-card); border-radius: 12px; padding: 40px; max-width: 860px; margin: 20px auto; box-shadow: var(--shadow-md); }
.static-page h1 { font-size: 28px; color: var(--text-primary); margin-bottom: 24px; padding-bottom: 16px; border-bottom: 2px solid var(--accent); }
.static-content { line-height: 1.8; color: var(--text-secondary); }
.static-content h2 { font-size: 20px; color: var(--text-primary); margin: 28px 0 14px; padding-left: 12px; border-left: 3px solid var(--accent); }
.static-content h3 { font-size: 17px; color: var(--text-primary); margin: 20px 0 10px; }
.static-content h4 { font-size: 15px; color: var(--text-primary); margin: 12px 0 6px; }
.static-content p { margin-bottom: 12px; }
.static-content ul, .static-content ol { margin: 8px 0 16px 20px; }
.static-content ul li, .static-content ol li { margin-bottom: 6px; }
.static-content strong { color: var(--text-primary); }
.faq-item { background: var(--faq-bg); border-radius: 8px; padding: 14px 18px; margin-bottom: 12px; }
.faq-item h4 { margin: 0 0 6px; color: var(--accent); }
.faq-item p { margin: 0; color: var(--text-muted); }

/* ============================================
   Page Header
   ============================================ */
.page-header { padding: 20px 0; }
.page-header h1 { font-size: 24px; color: var(--text-primary); }
.category-desc { font-size: 14px; color: var(--text-muted); margin-top: 6px; }

/* ============================================
   Profile Form
   ============================================ */
/*.profile-form, .prompt-form { max-width: 600px; }
.prompt-form { max-width: 700px; }*/
.form-actions { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }

/* ============================================
   My URLs
   ============================================ */
.url-list { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
.url-item {
    display: flex; align-items: center; gap: 6px;
    background: var(--bg-code); border: 1px solid var(--border-light); border-radius: 8px;
    padding: 8px 12px; font-size: 13px; transition: all 0.2s;
}
.url-item:hover { border-color: var(--accent); }
.url-item a { color: var(--accent); font-weight: 500; max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.url-item-actions { display: flex; gap: 4px; }
.url-item-actions button {
    background: none; border: none; cursor: pointer; font-size: 14px; color: var(--text-light);
    padding: 2px; border-radius: 4px; transition: color 0.2s;
}
.url-item-actions button:hover { color: var(--danger); }
.url-item-actions .btn-up:hover, .url-item-actions .btn-down:hover { color: var(--accent); }
.url-form-row { display: flex; gap: 10px; margin-bottom: 12px; align-items: flex-end; }
.url-form-row .form-group { margin-bottom: 0; flex: 1; }
.url-count { font-size: 12px; color: var(--text-light); margin-bottom: 12px; }

/* ============================================
   Responsive Design
   ============================================ */

/* Large screens (>= 1200px) - default */
@media (min-width: 1200px) {
    .container { max-width: 1200px; }
}

/* Tablet Landscape / Small Desktop (1024px - 1199px) */
@media (max-width: 1199px) and (min-width: 1024px) {
    .container { max-width: 1000px; padding: 0 16px; }
    .masonry-grid { columns: 3; column-gap: 14px; }
    .masonry-item { margin-bottom: 14px; }
    .related-grid { grid-template-columns: repeat(4, 1fr); }

    /* User & Admin - narrower sidebar on small desktop */
    .user-profile-page, .admin-page { grid-template-columns: 200px 1fr; gap: 20px; }
    .user-sidebar, .admin-sidebar { top: 70px; }
    .user-nav a, .admin-nav a { padding: 10px 16px; font-size: 13px; }
    .user-content, .admin-content { padding: 20px; }
}

/* Tablet (768px - 1023px) */
@media (max-width: 1023px) and (min-width: 768px) {
    .container { padding: 0 20px; }

    /* Header */
    .site-header .container { justify-content: space-between; }
    .main-nav { display: none; }
    .desktop-only { display: none; }
    .mobile-only { display: inline; }
    .mobile-search-btn { display: inline-flex; }
    .header-actions .login-btn { display: inline-flex; }
    .mobile-menu-toggle { display: block; }

    /* Masonry */
    .masonry-grid { columns: 3; column-gap: 14px; }
    .masonry-item { margin-bottom: 14px; }
    .card-body { padding: 12px; }
    .card-title { font-size: 14px; }

    /* Related */
    .related-grid { grid-template-columns: repeat(3, 1fr); }

    /* User & Admin - sidebar becomes top tabs on tablet and mobile */
    .user-profile-page, .admin-page {
        grid-template-columns: 1fr; gap: 16px; padding: 20px 0;
    }
    .user-sidebar, .admin-sidebar { position: static; }
    .user-card { padding: 20px; margin-bottom: 16px; text-align: left; display: flex; align-items: center; gap: 16px; }
    .user-avatar-large { width: 72px; height: 72px; margin: 0; }
    .user-card h3 { font-size: 16px; }
    .user-nav, .admin-nav {
        display: flex; flex-wrap: wrap;
        border-radius: 10px;
    }
    .user-nav a, .admin-nav a {
        flex: 1 1 calc(33.33% - 1px); padding: 10px 12px; font-size: 13px;
        border-bottom: 1px solid var(--border-faint); border-right: 1px solid var(--border-faint);
        border-left: 3px solid transparent;
        text-align: center;
    }
    .user-nav a:nth-child(3n), .admin-nav a:nth-child(3n) { border-right: none; }
    .user-nav a:nth-last-child(-n+3), .admin-nav a:nth-last-child(-n+3) { border-bottom: none; }
    .user-nav a:hover, .user-nav a.active,
    .admin-nav a:hover, .admin-nav a.active {
        border-left-color: var(--accent);
    }
    .user-content, .admin-content { padding: 20px; }
    .page-header { flex-direction: column; align-items: flex-start; gap: 12px; }

    /* Forms */
    .form-row { grid-template-columns: 1fr; gap: 12px; }

    /* Detail page */
    .prompt-detail { padding: 20px 0; }
    .prompt-main { padding: 24px; }
    .prompt-featured-image { margin: -24px -24px 16px -24px; }
    .prompt-gallery { margin: -24px -24px 16px -24px; }
    .prompt-title { font-size: 22px; }
    .gallery-thumb { width: 72px; height: 56px; }

    /* Auth */
    .auth-page { min-height: calc(100vh - 60px); padding: 30px 20px; }
    .auth-container { padding: 32px; max-width: 420px; }

    /* Static pages */
    .static-page { padding: 30px; margin: 16px auto; }
    .static-page h1 { font-size: 24px; }

    /* Operations */
    .stats-grid { grid-template-columns: repeat(4, 1fr); gap: 12px; }
    .stat-card { padding: 16px; }
    .stat-value { font-size: 24px; }
    .trend-chart { grid-template-columns: 1fr; gap: 20px; }

    /* URL list */
    .url-list { flex-direction: column; gap: 10px; }
    .url-item { width: 100%; padding: 10px 14px; }
    .url-item a { max-width: none; font-size: 14px; }
    .url-form-row { flex-direction: column; gap: 12px; align-items: stretch; }
    .url-form-row .form-group { width: 100%; }
    .url-form-row .btn { width: 100%; }
}

/* Mobile Large (481px - 767px) */
@media (max-width: 767px) and (min-width: 481px) {
    .container { padding: 0 16px; }

    /* Header */
    .site-header .container { height: 56px; gap: 8px; justify-content: space-between; }
    .logo { font-size: 18px; }
    .main-nav { display: none; }
    .desktop-only { display: none; }
    .mobile-only { display: inline; }
    .mobile-search-btn { display: inline-flex; }
    .login-btn { display: inline-flex; }
    .mobile-menu-toggle { display: block; font-size: 20px; padding: 6px; }
    .header-actions { gap: 8px; }
    .header-actions .btn { display: none; }
    .dropdown-toggle span { display: none; }
    .dropdown-menu { min-width: 140px; }
    .dropdown-menu a { padding: 8px 12px; font-size: 13px; }

    /* Mobile nav */
    .mobile-nav { padding: 10px 16px; gap: 6px; }
    .mobile-nav a {
        padding: 10px 12px; font-size: 14px;
        flex: 1 1 calc(33.33% - 6px); min-width: 100px;
    }

    /* Toolbar */
    .toolbar { margin-bottom: 16px; }
    .sort-tabs { margin-bottom: 10px; gap: 4px; }
    .sort-tab { padding: 7px 14px; font-size: 13px; }
    .cat-link { padding: 5px 12px; font-size: 12px; }

    /* Masonry */
    .masonry-grid { columns: 2; column-gap: 12px; margin-bottom: 20px; }
    .masonry-item { margin-bottom: 12px; }
    .card { border-radius: 10px; }
    .card-body { padding: 10px 12px; }
    .card-title { font-size: 13px; margin-bottom: 6px; }
    .card-meta { gap: 8px; font-size: 11px; }
    .card-image-placeholder { font-size: 24px; }

    /* Pagination */
    .pagination { margin: 20px 0; }
    .pagination li a, .pagination li span { padding: 7px 12px; font-size: 13px; }

    /* User & Admin layout - sidebar becomes top tabs */
    .user-profile-page, .admin-page {
        grid-template-columns: 1fr; gap: 16px; padding: 16px 0;
    }
    .user-sidebar, .admin-sidebar { position: static; }
    .user-card { padding: 16px; margin-bottom: 12px; }
    .user-avatar-large { width: 64px; height: 64px; }
    .user-card h3 { font-size: 16px; }
    .user-nav, .admin-nav {
        display: flex; flex-wrap: wrap;
        border-radius: 10px;
    }
    .user-nav a, .admin-nav a {
        flex: 1 1 calc(33.33% - 1px); padding: 10px 12px; font-size: 13px;
        border-bottom: 1px solid var(--border-faint); border-right: 1px solid var(--border-faint);
        border-left: 3px solid transparent;
        text-align: center;
    }
    .user-nav a:nth-child(3n), .admin-nav a:nth-child(3n) { border-right: none; }
    .user-nav a:nth-last-child(-n+3), .admin-nav a:nth-last-child(-n+3) { border-bottom: none; }
    .user-nav a:hover, .user-nav a.active,
    .admin-nav a:hover, .admin-nav a.active {
        border-left-color: var(--accent);
    }
    .user-content, .admin-content { padding: 16px; border-radius: 10px; }
    .user-content h2, .admin-content h2 { font-size: 18px; margin-bottom: 16px; }
    .page-header { flex-direction: column; align-items: flex-start; gap: 12px; }
    .section, .admin-section { margin-bottom: 24px; padding-bottom: 24px; }
    .section h3, .admin-section h3 { font-size: 15px; margin-bottom: 12px; }

    /* Forms */
    .form-group { margin-bottom: 14px; }
    .form-group label { font-size: 13px; }
    .form-group input, .form-group select, .form-group textarea {
        padding: 10px 12px; font-size: 15px;
    }
    .form-row { grid-template-columns: 1fr; gap: 12px; }
    .form-actions { flex-direction: column; }
    .form-actions .btn { width: 100%; }
    .btn { padding: 10px 18px; font-size: 14px; min-height: 44px; }
    .btn-sm { padding: 6px 12px; font-size: 12px; min-height: auto; }

    /* Detail page */
    .prompt-detail { padding: 16px 0; }
    .prompt-main { padding: 16px; border-radius: 12px; }
    .prompt-featured-image { margin: -16px -16px 14px -16px; border-radius: 12px 12px 0 0; }
    .prompt-gallery { margin: -16px -16px 14px -16px; }
    .gallery-main img { max-height: 350px; }
    .gallery-thumbs { padding: 10px; gap: 6px; }
    .gallery-thumb { width: 64px; height: 50px; border-radius: 5px; }
    .prompt-title { font-size: 20px; margin-bottom: 12px; }
    .prompt-meta { gap: 10px; margin-bottom: 14px; padding-bottom: 14px; }
    .meta-left, .meta-right { gap: 10px; font-size: 12px; }
    .prompt-taxonomy { margin-bottom: 16px; gap: 6px; }
    .taxonomy-item { font-size: 12px; padding: 3px 10px; }
    .prompt-content, .prompt-usage { margin-bottom: 20px; }
    .prompt-content h3, .prompt-usage h3 { font-size: 15px; margin-bottom: 8px; }
    .content-box { padding: 12px; font-size: 13px; line-height: 1.7; }
    .prompt-actions { padding-top: 14px; gap: 10px; flex-wrap: wrap; }
    .action-btn { padding: 10px 16px; font-size: 13px; min-height: 42px; flex: 1 1 calc(50% - 5px); }

    /* Related */
    .related-prompts { padding: 16px; border-radius: 12px; }
    .related-prompts h3 { font-size: 16px; margin-bottom: 12px; }
    .related-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .related-card-title { padding: 6px 8px; font-size: 11px; }

    /* Auth */
    .auth-page { min-height: calc(100vh - 56px); padding: 24px 16px; }
    .auth-container { padding: 24px; max-width: 100%; border-radius: 12px; }
    .auth-container h2 { font-size: 20px; margin-bottom: 20px; }
    .auth-form .form-group { margin-bottom: 14px; }
    .captcha-img { height: 40px; }
    .auth-links { font-size: 13px; }

    /* Modal */
    .modal-content { padding: 20px; max-width: 92%; width: 92%; border-radius: 12px; }
    .modal-header h3 { font-size: 16px; }

    /* Static pages */
    .static-page { padding: 20px; margin: 12px auto; border-radius: 10px; }
    .static-page h1 { font-size: 22px; padding-bottom: 12px; }
    .static-content h2 { font-size: 18px; margin: 24px 0 12px; }
    .static-content h3 { font-size: 16px; margin: 18px 0 10px; }

    /* Footer */
    .site-footer { padding: 16px; font-size: 12px; margin-top: 24px; }
    .footer-links { margin-bottom: 8px; font-size: 12px; }
    .footer-divider { margin: 0 6px; }

    /* Page header */
    .page-header { padding: 16px 0; }
    .page-header h1 { font-size: 20px; }

    /* Empty state */
    .empty-state { padding: 40px 16px; }
    .empty-state p { font-size: 15px; }

    /* Breadcrumb */
    .breadcrumb-nav { padding: 10px 0; }
    .breadcrumb-list { font-size: 13px; gap: 6px; }

    /* Operations */
    .stats-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .stat-card { padding: 14px; border-radius: 8px; }
    .stat-value { font-size: 20px; }
    .stat-label { font-size: 12px; }
    .trend-chart { grid-template-columns: 1fr; gap: 16px; }
    .trend-section h4 { font-size: 13px; margin-bottom: 10px; }
    .trend-bars { height: 100px; gap: 6px; }
    .trend-bar-label { font-size: 10px; }
    .trend-bar-val { font-size: 10px; top: -14px; }

    /* URL list */
    .url-list { flex-direction: column; gap: 8px; }
    .url-item { width: 100%; padding: 10px 12px; }
    .url-item a { max-width: none; font-size: 13px; }
    .url-form-row { flex-direction: column; gap: 10px; align-items: stretch; }
    .url-form-row .form-group { width: 100%; }
    .url-form-row .btn { width: 100%; }

    /* Ad slots */
    .ad-slot { margin: 12px auto; }
}

/* Mobile Small (<= 480px) */
@media (max-width: 480px) {
    .container { padding: 0 12px; }

    /* Header */
    .site-header .container { height: 52px; gap: 6px; justify-content: space-between; }
    .logo { font-size: 16px; }
    .main-nav { display: none; }
    .desktop-only { display: none; }
    .mobile-only { display: inline; }
    .mobile-search-btn { display: inline-flex; }
    .header-actions .login-btn { display: inline-flex; }
    .mobile-menu-toggle { display: block; font-size: 18px; padding: 6px; }
    .avatar-sm { width: 28px; height: 28px; }
    .dark-toggle { font-size: 16px; padding: 4px 6px; }
    .header-actions .btn { display: none; }

    /* Mobile nav */
    .mobile-nav { padding: 8px 12px; gap: 6px; }
    .mobile-nav a {
        padding: 9px 10px; font-size: 13px;
        flex: 1 1 calc(50% - 6px); min-width: 0;
    }

    /* Toolbar */
    .toolbar { margin-bottom: 12px; }
    .sort-tabs { gap: 4px; margin-bottom: 8px; }
    .sort-tab { padding: 6px 10px; font-size: 12px; border-radius: 16px; }
    .category-filter { gap: 4px; }
    .cat-link { padding: 5px 10px; font-size: 12px; }

    /* Masonry */
    .masonry-grid { columns: 1; column-gap: 0; margin-bottom: 16px; }
    .masonry-item { margin-bottom: 12px; }
    .card { border-radius: 10px; }
    .card-body { padding: 12px 14px; }
    .card-title { font-size: 15px; line-height: 1.4; }
    .card-meta { font-size: 12px; gap: 10px; }

    /* Pagination */
    .pagination { margin: 16px 0; }
    .pagination ul { gap: 2px; }
    .pagination li a, .pagination li span {
        padding: 8px 12px; font-size: 13px;
    }

    /* User & Admin */
    .user-profile-page, .admin-page {
        grid-template-columns: 1fr; padding: 12px 0; gap: 12px;
    }
    .user-sidebar, .admin-sidebar { position: static; }
    .user-card { padding: 14px; }
    .user-avatar-large { width: 56px; height: 56px; }
    .user-card h3 { font-size: 15px; }
    .user-username { font-size: 12px; }
    .user-nav, .admin-nav {
        display: flex; flex-wrap: wrap;
        border-radius: 8px;
    }
    .user-nav a, .admin-nav a {
        flex: 1 1 calc(50% - 1px); padding: 10px 12px; font-size: 13px;
        border-bottom: 1px solid var(--border-faint); border-right: 1px solid var(--border-faint);
        border-left: 3px solid transparent;
        text-align: center;
    }
    .user-nav a:nth-child(2n), .admin-nav a:nth-child(2n) { border-right: none; }
    .user-nav a:nth-last-child(-n+2), .admin-nav a:nth-last-child(-n+2) { border-bottom: none; }
    .user-nav a:hover, .user-nav a.active,
    .admin-nav a:hover, .admin-nav a.active {
        border-left-color: var(--accent);
    }
    .user-content, .admin-content { padding: 14px; }
    .user-content h2, .admin-content h2 { font-size: 17px; margin-bottom: 14px; }
    .page-header { flex-direction: column; align-items: flex-start; gap: 10px; }
    .section, .admin-section { margin-bottom: 20px; padding-bottom: 20px; }
    .section h3, .admin-section h3 { font-size: 14px; margin-bottom: 10px; }

    /* Admin table */
    .admin-table { min-width: 500px; font-size: 13px; }
    .admin-table th, .admin-table td { padding: 10px 8px; }

    /* Forms */
    .form-group { margin-bottom: 12px; }
    .form-group label { font-size: 13px; margin-bottom: 5px; }
    .form-group input, .form-group select, .form-group textarea {
        padding: 12px 14px; font-size: 16px; border-radius: 8px;
    }
    .form-group textarea { min-height: 100px; }
    .form-actions { flex-direction: column; }
    .form-actions .btn { width: 100%; }
    .btn { padding: 12px 20px; font-size: 15px; min-height: 46px; border-radius: 8px; }
    .btn-block { width: 100%; }
    .btn-sm { padding: 6px 10px; font-size: 12px; min-height: auto; }
    .avatar-upload { flex-direction: column; align-items: flex-start; gap: 12px; }

    /* Detail page */
    .prompt-detail { padding: 12px 0; }
    .prompt-main { padding: 14px; border-radius: 10px; }
    .prompt-featured-image { margin: -14px -14px 12px -14px; }
    .prompt-gallery { margin: -14px -14px 12px -14px; }
    .gallery-main img { max-height: 280px; }
    .gallery-thumbs { padding: 8px; gap: 6px; }
    .gallery-thumb { width: 56px; height: 44px; }
    .prompt-title { font-size: 18px; margin-bottom: 10px; line-height: 1.4; }
    .prompt-meta {
        flex-direction: column; align-items: flex-start;
        gap: 8px; margin-bottom: 12px; padding-bottom: 12px;
    }
    .meta-left, .meta-right { width: 100%; gap: 12px; font-size: 12px; flex-wrap: wrap; }
    .prompt-taxonomy { margin-bottom: 14px; gap: 6px; }
    .taxonomy-item { font-size: 12px; padding: 4px 10px; }
    .prompt-intro { margin-bottom: 16px; }
    .prompt-intro h3 { font-size: 14px; margin-bottom: 8px; }
    .prompt-content, .prompt-usage { margin-bottom: 18px; }
    .prompt-content h3, .prompt-usage h3 { font-size: 14px; margin-bottom: 8px; }
    .content-box { padding: 12px; font-size: 14px; line-height: 1.7; }
    .prompt-actions {
        flex-direction: column; padding-top: 12px; gap: 8px;
    }
    .action-btn {
        width: 100%; text-align: center; padding: 12px 16px;
        font-size: 14px; min-height: 46px; border-radius: 8px;
    }

    /* Related */
    .related-prompts { padding: 14px; border-radius: 10px; }
    .related-prompts h3 { font-size: 15px; margin-bottom: 10px; }
    .related-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .related-card-title { padding: 6px 8px; font-size: 12px; line-height: 1.4; }

    /* Auth */
    .auth-page { min-height: calc(100vh - 52px); padding: 20px 12px; }
    .auth-container { padding: 20px; border-radius: 12px; }
    .auth-container h2 { font-size: 18px; margin-bottom: 16px; }
    .captcha-group .captcha-row { flex-direction: column; align-items: stretch; gap: 10px; }
    .captcha-img { height: 44px; align-self: flex-start; }
    .auth-links { margin-top: 16px; font-size: 12px; }
    .auth-links span { margin: 0 6px; }

    /* Modal */
    .modal-content { padding: 16px; max-width: 95%; width: 95%; border-radius: 10px; }
    .modal-header { margin-bottom: 12px; }
    .modal-header h3 { font-size: 16px; }
    .modal-close { font-size: 20px; }

    /* Static pages */
    .static-page { padding: 16px; margin: 10px auto; border-radius: 10px; }
    .static-page h1 { font-size: 20px; padding-bottom: 10px; }
    .static-content { font-size: 14px; line-height: 1.7; }
    .static-content h2 { font-size: 17px; margin: 20px 0 10px; }
    .static-content h3 { font-size: 15px; margin: 16px 0 8px; }
    .static-content p { margin-bottom: 10px; }
    .static-content ul, .static-content ol { margin: 6px 0 14px 18px; }
    .faq-item { padding: 12px 14px; }

    /* Footer */
    .site-footer { padding: 14px 12px; font-size: 12px; margin-top: 20px; }
    .footer-links {
        display: flex; flex-wrap: wrap; justify-content: center;
        gap: 4px 6px; margin-bottom: 8px;
    }
    .footer-divider { display: none; }
    .footer-links a { padding: 4px 6px; font-size: 12px; }
    .friend-links { margin-top: 10px; padding-top: 10px; }

    /* Page header */
    .page-header { padding: 12px 0; }
    .page-header h1 { font-size: 18px; }

    /* Empty state */
    .empty-state { padding: 32px 16px; }
    .empty-state p { font-size: 14px; margin-bottom: 12px; }
    .empty-state .btn { padding: 10px 20px; }

    /* Error page */
    .error-page { padding: 40px 16px; }
    .error-code { font-size: 80px; }
    .error-title { font-size: 22px; }
    .error-desc { font-size: 14px; }
    .error-actions { flex-direction: column; }
    .error-actions .btn { width: 100%; }

    /* Breadcrumb */
    .breadcrumb-nav { padding: 8px 0; }
    .breadcrumb-list { font-size: 12px; }

    /* Operations */
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .stat-card { padding: 12px; border-radius: 8px; }
    .stat-value { font-size: 20px; }
    .stat-label { font-size: 12px; }
    .trend-chart { grid-template-columns: 1fr; gap: 14px; }
    .trend-bars { height: 90px; gap: 4px; }
    .trend-bar { max-width: 36px; }
    .trend-bar-label { font-size: 10px; }

    /* URL list */
    .url-list { flex-direction: column; gap: 8px; }
    .url-item { width: 100%; padding: 10px 12px; }
    .url-item a { max-width: none; font-size: 13px; }
    .url-form-row { flex-direction: column; gap: 10px; align-items: stretch; }
    .url-form-row .form-group { width: 100%; }
    .url-form-row .btn { width: 100%; }

    /* Ad slots */
    .ad-slot { margin: 10px auto; }
    .ad-slot--header_banner .ad-content { padding: 0 10px; }

    /* Image gallery upload */
    .image-gallery { gap: 8px; }
    .image-gallery-item { width: 100px; height: 100px; }
}

/* Ultra small screens (<= 360px) */
@media (max-width: 360px) {
    .container { padding: 0 10px; }

    .logo { font-size: 15px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 6px; }
    .stat-card { padding: 10px; }
    .stat-value { font-size: 18px; }
    .stat-label { font-size: 11px; }
    .related-grid { grid-template-columns: 1fr; }
    .mobile-nav a { font-size: 12px; padding: 8px 8px; }
    .sort-tab { padding: 5px 8px; font-size: 11px; }
    .cat-link { padding: 4px 8px; font-size: 11px; }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .site-header, .site-footer, .prompt-actions, .related-prompts, .mobile-nav, .dark-toggle, .toolbar, .pagination, .ad-slot { display: none; }
    .prompt-main { box-shadow: none; border: 1px solid #ddd; }
    .container { max-width: 100%; padding: 0; }
    body { background: #fff; color: #000; }
}

/* ============================================
   Accessibility
   ============================================ */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.masonry-item { animation: fadeIn 0.3s ease; }
@keyframes spin { to { transform: rotate(360deg); } }
.loading::after { content: ''; display: inline-block; width: 16px; height: 16px; border: 2px solid var(--border-color); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.6s linear infinite; margin-left: 8px; vertical-align: middle; }

/* ============================================
   Safe area support for modern phones
   ============================================ */
@supports (padding: max(0px)) {
    .site-header {
        padding-top: max(0px, env(safe-area-inset-top));
    }
    .site-footer {
        padding-bottom: max(16px, env(safe-area-inset-bottom));
    }
    .mobile-nav {
        padding-bottom: max(12px, env(safe-area-inset-bottom));
    }
}

/* ============================================
   Accessibility
   ============================================ */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.masonry-item { animation: fadeIn 0.3s ease; }
@keyframes spin { to { transform: rotate(360deg); } }
.loading::after { content: ''; display: inline-block; width: 16px; height: 16px; border: 2px solid var(--border-color); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.6s linear infinite; margin-left: 8px; vertical-align: middle; }

/* ============================================
   Ad Slots
   ============================================ */
.ad-slot {
    margin: 16px auto; overflow: hidden; text-align: center;
}
.ad-label {
    font-size: 11px; color: var(--ad-label); margin-bottom: 4px; text-transform: uppercase;
    letter-spacing: 1px;
}
.ad-content { display: flex; justify-content: center; }
.ad-content img { max-width: 100%; height: auto; }
.ad-content ins { display: block; }

/* 顶部横幅 */
.ad-slot--header_banner { max-width: 100%; margin: 0 auto 16px; }
.ad-slot--header_banner .ad-content { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* 底部横幅 */
.ad-slot--footer_banner { max-width: 100%; margin: 16px auto 0; }

/* 列表页广告 */
.ad-slot--list_top { margin: 0 0 20px; }
.ad-slot--list_middle { margin: 20px 0; }
.ad-slot--list_bottom { margin: 20px 0 0; }

/* 详情页广告 */
.ad-slot--detail_top { margin: 0 0 20px; }
.ad-slot--detail_content { margin: 20px 0; }
.ad-slot--detail_related { margin: 20px 0 0; }
.ad-slot--detail_bottom { margin: 20px 0 0; }

/* 侧边栏广告 */
.ad-slot--sidebar_top { margin: 0 0 16px; }
.ad-slot--sidebar_top .ad-content { justify-content: center; }
.ad-slot--sidebar_bottom { margin: 16px 0 0; }
.ad-slot--sidebar_bottom .ad-content { justify-content: center; }

/* 侧边栏提示 */
.sidebar-tip { margin-top: 16px; background: var(--bg-card); border-radius: 12px; box-shadow: var(--shadow-sm); }

/* ============================================
   Ad Slot Admin Cards
   ============================================ */
.ad-slot-card {
    background: var(--bg-code); border-radius: 10px; padding: 20px; margin-bottom: 16px;
    border: 1px solid var(--border-light);
}
.ad-slot-header {
    display: flex; justify-content: space-between; align-items: flex-start;
    margin-bottom: 16px; gap: 16px;
}
.ad-slot-info h4 { font-size: 15px; color: var(--text-primary); margin-bottom: 4px; }
.ad-slot-info code { font-size: 12px; color: var(--text-light); background: var(--border-light); padding: 1px 6px; border-radius: 3px; }
.ad-slot-desc { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.ad-slot-toggle { display: flex; align-items: center; gap: 10px; white-space: nowrap; }
.switch-label { font-size: 13px; color: var(--text-muted); }

/* Switch Toggle */
.switch { position: relative; display: inline-block; width: 48px; height: 26px; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch-slider {
    position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0;
    background: var(--switch-bg); border-radius: 26px; transition: 0.3s;
}
.switch-slider::before {
    content: ''; position: absolute; height: 20px; width: 20px; left: 3px; bottom: 3px;
    background: #fff; border-radius: 50%; transition: 0.3s;
}
.switch input:checked + .switch-slider { background: var(--accent); }
.switch input:checked + .switch-slider::before { transform: translateX(22px); }

/* Responsive ads */
@media (max-width: 768px) {
    .ad-slot--header_banner .ad-content { padding: 0 10px; }
    .ad-slot--sidebar_top, .ad-slot--sidebar_bottom { margin: 0 0 12px; }
}

/* ============================================
   Breadcrumb Navigation
   ============================================ */
.breadcrumb-nav {
    padding: 12px 0;
    border-bottom: 1px solid var(--border-light);
    background: var(--bg-card);
}
.breadcrumb-nav .breadcrumb-list {
    list-style: none !important;
    list-style-type: none !important;
    padding: 0 !important;
    margin: 0 !important;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0;
    font-size: 14px;
}
.breadcrumb-nav .breadcrumb-item {
    display: flex;
    align-items: center;
    color: var(--text-muted);
    list-style: none !important;
}
.breadcrumb-nav .breadcrumb-item::before,
.breadcrumb-nav .breadcrumb-item::marker {
    display: none !important;
    content: '';
}
.breadcrumb-nav .breadcrumb-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
    padding: 0 8px;
}
.breadcrumb-nav .breadcrumb-item:first-child a {
    padding-left: 0;
}
.breadcrumb-nav .breadcrumb-item a:hover {
    color: var(--accent);
}
.breadcrumb-nav .breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 500;
    padding: 0 8px;
}
.breadcrumb-nav .breadcrumb-item + .breadcrumb-item::before {
    content: '/';
    color: var(--text-light);
    flex-shrink: 0;
}

/* ============================================
   404 Error Page
   ============================================ */
.error-page {
    text-align: center;
    padding: 60px 20px;
}
.error-code {
    font-size: 120px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 20px;
}
.error-title {
    font-size: 28px;
    color: var(--text-primary);
    margin-bottom: 12px;
}
.error-desc {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}
.error-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}
.error-search {
    max-width: 500px;
    margin: 0 auto 40px;
}
.error-search .search-form {
    display: flex;
    gap: 8px;
}
.error-search input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    background: var(--bg-input);
    color: var(--text-primary);
}
.error-hot h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 20px;
}

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Friend Links */
.friend-links {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-light);
    font-size: 13px;
    color: var(--text-muted);
}
.friend-links-label {
    margin-right: 8px;
    font-weight: 500;
    color: var(--text-secondary);
}
.friend-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin-right: 12px;
    transition: color 0.2s;
}
.friend-links a:hover {
    color: var(--accent);
}

.footer-custom-code {
    margin-top: 12px;
    font-size: 13px;
    color: var(--text-muted);
}
.footer-custom-code a {
    color: var(--text-muted);
}
.footer-custom-code a:hover {
    color: var(--accent);
}

/* ============================================
   Operations Dashboard
   ============================================ */
.stats-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 14px; margin-bottom: 10px;
}
.stat-card {
    background: var(--stat-card-bg); border-radius: 10px; padding: 20px; text-align: center;
    border: 1px solid var(--stat-card-border); transition: transform 0.2s;
}
.stat-card:hover { transform: translateY(-2px); }
.stat-value { font-size: 28px; font-weight: 700; margin-bottom: 4px; }
.stat-label { font-size: 13px; color: var(--text-muted); }
.stat-card--primary .stat-value { color: var(--accent); }
.stat-card--success .stat-value { color: var(--success); }
.stat-card--info .stat-value { color: #17a2b8; }
.stat-card--warning .stat-value { color: #f0ad4e; }
.stat-card--purple .stat-value { color: #6f42c1; }
.stat-card--danger .stat-value { color: var(--danger); }

/* Trend Chart */
.trend-chart { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.trend-section h4 { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; }
.trend-bars {
    display: flex; align-items: flex-end; gap: 8px; height: 120px;
    padding: 8px 0; border-bottom: 2px solid var(--trend-border);
}
.trend-bar-item { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; height: 100%; }
.trend-bar {
    background: linear-gradient(180deg, #667eea, #764ba2); width: 100%;
    border-radius: 4px 4px 0 0; min-height: 4px; transition: all 0.3s;
    position: relative; max-width: 48px;
}
.trend-bar--blue { background: linear-gradient(180deg, #17a2b8, #138496); }
.trend-bar:hover { opacity: 0.8; }
.trend-bar-val { position: absolute; top: -18px; left: 50%; transform: translateX(-50%); font-size: 11px; color: var(--text-muted); font-weight: 600; white-space: nowrap; }
.trend-bar-label { font-size: 11px; color: var(--text-light); margin-top: 6px; }

@media (max-width: 768px) {
    .stats-grid { grid-template-columns: repeat(3, 1fr); }
    .trend-chart { grid-template-columns: 1fr; }
}