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

:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Light Theme (Default) */
  --bg-rgb: 250, 250, 250;
  --bg: #FAFAFA;
  --surface: #FFFFFF;
  --surface2: #F4F4F5;
  --border: #E4E4E7;
  --text: #09090B;
  --text-muted: #71717A;
  
  --accent: #09090B;
  --accent-hover: #27272A;
  --accent-text: #FAFAFA;
  
  --danger: #EF4444;
  --danger-hover: #DC2626;
  --like: #EF4444;
  --fav: #F59E0B;
  
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-full: 8px;
  
  --nav-h: 72px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.08), 0 2px 4px -2px rgb(0 0 0 / 0.08);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-rgb: 9, 9, 11;
    --bg: #09090B;
    --surface: #18181B;
    --surface2: #27272A;
    --border: #3F3F46;
    --text: #FAFAFA;
    --text-muted: #A1A1AA;
    
    --accent: #FAFAFA;
    --accent-hover: #E4E4E7;
    --accent-text: #09090B;
  }
}

html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; transition: color 0.2s; }
img { display: block; max-width: 100%; border-radius: inherit; }
.icon { width: 1em; height: 1em; stroke-width: 2; flex-shrink: 0; }

/* === Navbar === */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(var(--bg-rgb), 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
}

.nav-inner {
  max-width: 1400px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
}
.logo {
  font-size: 1.25rem; font-weight: 800; font-family: var(--font-mono);
  letter-spacing: -0.5px; color: var(--text);
}
.logo:hover { opacity: 0.8; }

.nav-links { display: flex; gap: 8px; align-items: center; }
.nav-link {
  color: var(--text-muted); padding: 8px 16px; border-radius: var(--radius-full);
  font-size: 0.95rem; font-weight: 500; transition: all 0.2s;
}
.nav-link:hover { color: var(--text); background: var(--surface2); }
.admin-link { color: var(--text); }
.nav-user {
  color: var(--accent-text); font-size: 0.9rem; font-weight: 600;
  padding: 8px 16px; background: var(--accent); border-radius: var(--radius-full);
  margin-left: 8px;
}
.nav-toggle { display: none; background: none; border: none; color: var(--text); font-size: 1.5rem; cursor: pointer; }

/* === Main === */
.main-content {
  flex: 1;
  max-width: 1400px; margin: 0 auto; padding: 40px 24px;
  width: 100%;
}

/* === Footer === */
.footer {
  text-align: center; padding: 32px 24px;
  color: var(--text-muted); font-size: 0.9rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

/* === Browse Header === */
.browse-header { margin-bottom: 48px; display: flex; flex-direction: column; align-items: center; text-align: center; }
.hero-title { font-size: 3rem; font-weight: 800; color: var(--text); margin-bottom: 12px; letter-spacing: -1px; }
.hero-subtitle { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 32px; font-weight: 500; }
.search-bar {
  display: flex; gap: 8px; margin-bottom: 24px;
  width: 100%; max-width: 600px;
  position: relative;
}
.search-bar input {
  flex: 1; padding: 16px 24px;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); border-radius: var(--radius-full);
  font-size: 1rem; outline: none; transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}
.search-bar input:focus { 
  border-color: var(--text-muted); 
  box-shadow: var(--shadow-md);
}
.search-bar button {
  padding: 0 32px; background: var(--accent); color: var(--accent-text);
  border: none; border-radius: var(--radius-full); cursor: pointer;
  font-size: 1rem; font-weight: 600; transition: all 0.2s;
  position: absolute; right: 6px; top: 6px; bottom: 6px;
}
.search-bar button:hover { background: var(--accent-hover); transform: scale(0.98); }

.announcement-board {
  width: 100%; max-width: 860px; text-align: left;
  margin: 0 auto 24px; padding: 18px 20px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
}
.announcement-title {
  color: var(--text-muted); font-size: 0.85rem; font-weight: 700;
  margin-bottom: 10px;
}
.markdown-body { color: var(--text); line-height: 1.7; font-size: 0.98rem; }
.markdown-body h3, .markdown-body h4, .markdown-body h5 {
  color: var(--text); font-weight: 800; margin: 12px 0 8px;
}
.markdown-body h3 { font-size: 1.25rem; }
.markdown-body h4 { font-size: 1.1rem; }
.markdown-body h5 { font-size: 1rem; }
.markdown-body p { margin: 8px 0; }
.markdown-body ul { margin: 8px 0 8px 20px; }
.markdown-body li { margin: 4px 0; }
.markdown-body a { color: var(--text); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.markdown-body code {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 2px 6px; font-family: var(--font-mono); font-size: 0.88em;
}

.browse-controls { 
  display: flex; align-items: center; justify-content: center; 
  margin-bottom: 16px; width: 100%;
}
.control-label { display: none; }
.sort-group { 
  display: flex; gap: 8px; flex-wrap: wrap; justify-content: center;
  background: var(--surface); padding: 6px; 
  border-radius: var(--radius-full); border: 1px solid var(--border);
}
.sort-btn {
  padding: 8px 20px; border-radius: var(--radius-full);
  color: var(--text-muted); font-weight: 500;
  font-size: 0.9rem; border: none; background: transparent;
  transition: all 0.2s; cursor: pointer;
}
.sort-btn:hover { color: var(--text); }
.sort-btn.active { background: var(--surface2); color: var(--text); box-shadow: var(--shadow-sm); }

.active-tag {
  padding: 10px 20px; background: var(--surface); border-radius: var(--radius-full);
  margin-bottom: 24px; font-size: 0.95rem; display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--border);
}
.active-tag strong { color: var(--text); }
.active-tag a { color: var(--text-muted); padding: 4px; border-radius: 50%; display: inline-flex; }
.active-tag a:hover { color: var(--danger); background: var(--surface2); }

/* === Tag Cloud === */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.collapsible-tags .is-collapsed-extra { display: none; }
.collapsible-tags.expanded .is-collapsed-extra { display: inline-flex; }
.tag-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 6px 14px; border-radius: var(--radius-full);
  background: var(--surface2); color: var(--text);
  border: 1px solid var(--border); font-size: 0.85rem; font-weight: 700;
  cursor: pointer; transition: all 0.2s;
}
.tag-toggle:hover { border-color: var(--text-muted); }
.tag-toggle.small { padding: 4px 10px; font-size: 0.78rem; }
.compact-tags { align-items: center; }
.tag-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 16px; border-radius: var(--radius-full);
  background: var(--surface); color: var(--text-muted);
  font-size: 0.9rem; border: 1px solid var(--border);
  transition: all 0.2s; font-weight: 500;
}
.tag-chip:hover { border-color: var(--text-muted); background: var(--surface2); color: var(--text); }
.tag-chip.active { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.tag-chip.small { padding: 4px 12px; font-size: 0.8rem; }
.tag-count { opacity: 0.6; font-size: 0.8rem; }

/* === Grid View === */
.wallpaper-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.grid-item {
  background: var(--surface); border-radius: var(--radius);
  overflow: hidden; border: 1px solid var(--border);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex; flex-direction: column; position: relative;
}
.grid-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.grid-thumb { display: block; overflow: hidden; aspect-ratio: 16/10; }
.grid-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.grid-item:hover .grid-thumb img { transform: scale(1.05); }
.grid-info {
  position: absolute; right: 10px; bottom: 10px; z-index: 2;
  padding: 0; display: flex; justify-content: flex-end; align-items: center;
  pointer-events: none;
}
.grid-title { display: none; }
.grid-stats {
  display: flex; gap: 10px; font-size: 0.86rem; color: #fff; font-weight: 700;
  padding: 7px 9px; border-radius: var(--radius);
  background: rgba(0,0,0,0.56); backdrop-filter: blur(8px);
  box-shadow: 0 2px 10px rgba(0,0,0,0.18);
  pointer-events: auto;
}
.stat { display: inline-flex; align-items: center; gap: 4px; }

/* === Masonry View === */
.wallpaper-masonry {
  columns: 4 300px;
  column-gap: 24px;
}
.masonry-item {
  break-inside: avoid; margin-bottom: 24px;
  position: relative; border-radius: var(--radius);
  overflow: hidden; background: var(--surface);
  border: 1px solid var(--border);
}
.masonry-item a { display: block; }
.masonry-item img {
  width: 100%; display: block;
  transition: transform 0.5s;
}
.masonry-item:hover { border-color: transparent; box-shadow: var(--shadow-lg); }
.masonry-item:hover img { transform: scale(1.03); }
.masonry-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 50%);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 20px; opacity: 0; transition: opacity 0.3s;
  pointer-events: none;
}
.masonry-item:hover .masonry-overlay { opacity: 1; }
.masonry-overlay h3 { color: #FFF; font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
.overlay-stats { display: flex; gap: 16px; font-size: 0.95rem; color: #FFF; font-weight: 500; }
.overlay-stats .like-btn,
.overlay-stats .fav-btn { pointer-events: auto; }

/* === List View === */
.wallpaper-list { display: flex; flex-direction: column; gap: 16px; max-width: 900px; margin: 0 auto; }
.list-item {
  display: flex; gap: 24px; padding: 16px;
  background: var(--surface); border-radius: var(--radius);
  align-items: center; border: 1px solid var(--border);
  transition: all 0.2s;
}
.list-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: transparent; }
.list-thumb { flex-shrink: 0; overflow: hidden; border-radius: var(--radius-sm); }
.list-thumb img {
  width: 160px; height: 100px; object-fit: cover;
  transition: transform 0.3s;
}
.list-item:hover .list-thumb img { transform: scale(1.05); }
.list-info { flex: 1; min-width: 0; }
.list-title { color: var(--text); font-weight: 600; font-size: 1.1rem; display: block; margin-bottom: 8px; }
.list-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.list-stats { display: flex; gap: 20px; font-size: 0.9rem; color: var(--text-muted); font-weight: 500; }

/* === Like/Fav buttons === */
.like-btn, .fav-btn { cursor: pointer; user-select: none; transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1); }
.like-btn:hover, .fav-btn:hover { transform: scale(1.15); }
.like-btn.active { color: var(--like); }
.fav-btn.active { color: var(--fav); }
.like-btn.active .like-icon, .fav-btn.active .fav-icon { fill: currentColor; }

/* === Detail Page === */
.detail-page { max-width: 1200px; margin: 0 auto; }
.back-link { 
  display: inline-flex; align-items: center; gap: 8px; margin-bottom: 24px; 
  color: var(--text-muted); font-size: 1rem; font-weight: 500;
  padding: 8px 16px; background: var(--surface); border-radius: var(--radius-full);
  border: 1px solid var(--border); transition: all 0.2s;
}
.back-link:hover { color: var(--text); background: var(--surface2); }

.detail-main { display: grid; grid-template-columns: 1fr 400px; gap: 40px; }
.detail-image-wrap {
  background: var(--surface); border-radius: var(--radius-lg);
  overflow: hidden; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); box-shadow: var(--shadow-sm);
  padding: 16px;
}
.detail-image {
  width: 100%; height: auto; max-height: 80vh; object-fit: contain;
  border-radius: var(--radius-sm);
}
.image-view-trigger {
  display: block; position: relative; width: 100%; padding: 0; border: 0; background: transparent;
  cursor: zoom-in;
}
.image-view-caption {
  position: absolute; right: 12px; bottom: 12px;
  padding: 6px 10px; border-radius: var(--radius-full);
  color: #fff; background: rgba(0,0,0,0.58);
  font-size: 0.82rem; line-height: 1;
}
.detail-sidebar {
  display: flex; flex-direction: column; gap: 24px;
}
.detail-title { font-size: 2rem; font-weight: 800; color: var(--text); line-height: 1.2; }
.detail-desc { color: var(--text-muted); line-height: 1.7; font-size: 1.05rem; }

.detail-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.stat-box {
  text-align: center; padding: 16px;
  background: var(--surface); border-radius: var(--radius);
  border: 1px solid var(--border);
}
.stat-num { display: block; font-size: 1.5rem; font-weight: 700; color: var(--text); font-family: var(--font-mono); }
.stat-label { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; margin-top: 4px; display: block; }

.detail-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.action-btn {
  padding: 16px;
  background: var(--surface); color: var(--text); font-weight: 600;
  border: 1px solid var(--border); border-radius: var(--radius);
  font-size: 1rem; cursor: pointer; transition: all 0.2s;
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.action-btn:hover { background: var(--surface2); }
.action-btn.active.like-btn { border-color: var(--like); color: var(--like); background: rgba(239, 68, 68, 0.05); }
.action-btn.active.fav-btn { border-color: var(--fav); color: var(--fav); background: rgba(245, 158, 11, 0.05); }

.detail-tags h3 { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }

.detail-meta { font-size: 0.9rem; color: var(--text-muted); display: flex; flex-direction: column; gap: 8px; padding-top: 24px; border-top: 1px solid var(--border); }
.external-badge {
  display: inline-flex; align-items: center; padding: 4px 10px; border-radius: var(--radius-full);
  background: var(--surface2); color: var(--text); font-size: 0.8rem; font-weight: 600;
  border: 1px solid var(--border);
}
.download-btn {
  display: block; text-align: center; padding: 16px;
  background: var(--accent); color: var(--accent-text); border-radius: var(--radius-full);
  font-weight: 600; font-size: 1.05rem; transition: transform 0.2s, opacity 0.2s;
}
.download-btn:hover { opacity: 0.9; transform: scale(0.98); color: var(--accent-text); }
.download-btn.secondary {
  background: var(--surface2); color: var(--text); border: 1px solid var(--border);
}
.detail-nav-row { display: flex; gap: 10px; flex-wrap: wrap; }
.detail-nav-row .btn { flex: 1; }
.image-viewer {
  display: none; position: fixed; inset: 0; z-index: 500;
  background: rgba(0,0,0,0.92); padding: 72px 24px 24px;
}
.image-viewer.open { display: flex; align-items: center; justify-content: center; }
.image-viewer-stage {
  width: 100%; height: 100%; overflow: auto;
  display: flex; align-items: center; justify-content: center;
  cursor: grab; touch-action: none;
}
.image-viewer-stage.dragging { cursor: grabbing; }
.image-viewer img {
  max-width: 100%; max-height: 100%; object-fit: contain;
  transform-origin: center center; transition: transform 0.08s ease-out;
  user-select: none; pointer-events: none;
}
.image-viewer img.actual-size {
  max-width: none; max-height: none;
  width: auto; height: auto;
}
.image-viewer-stage:has(img.actual-size) {
  align-items: flex-start; justify-content: flex-start;
}
.image-viewer-bar {
  position: fixed; top: 0; left: 0; right: 0; min-height: 56px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 12px 20px; color: #fff;
  background: rgba(0,0,0,0.78); border-bottom: 1px solid rgba(255,255,255,0.12);
}
.image-viewer-actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.viewer-scale {
  display: inline-flex; align-items: center; min-width: 48px; justify-content: center;
  color: #fff; font-family: var(--font-mono); font-size: 0.8rem;
}

/* === Tags Page === */
.tags-page { max-width: 1000px; margin: 0 auto; text-align: center; }
.tags-page h1 { margin-bottom: 40px; color: var(--text); font-size: 2.5rem; font-weight: 800; }
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; margin-bottom: 32px;
}
.page-header h1 { color: var(--text); font-size: 2rem; font-weight: 800; }
.collection-tabs { display: flex; gap: 8px; flex-wrap: wrap; background: var(--surface); padding: 6px; border-radius: var(--radius-full); border: 1px solid var(--border); }
.settings-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 18px; }
.tag-cloud-lg { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.tag-badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 24px; border-radius: var(--radius-full);
  background: var(--surface); border: 1px solid var(--border);
  font-size: 1.1rem; font-weight: 500; transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}
.tag-badge:hover { border-color: var(--text-muted); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.badge-count {
  background: var(--surface2); color: var(--text);
  padding: 4px 10px; border-radius: var(--radius-full); font-size: 0.85rem; font-weight: 700;
  font-family: var(--font-mono);
}

/* === Login Page === */
.login-page {
  display: grid; grid-template-columns: minmax(260px, 0.85fr) minmax(320px, 420px);
  align-items: center; gap: 48px; min-height: 70vh; max-width: 960px; margin: 0 auto;
}
.login-intro { display: flex; flex-direction: column; gap: 14px; }
.login-brand {
  color: var(--text-muted); font-family: var(--font-mono); font-size: 0.95rem; font-weight: 800;
}
.login-intro h1 {
  color: var(--text); font-size: 2.4rem; line-height: 1.1; font-weight: 800;
}
.login-intro p { color: var(--text-muted); line-height: 1.7; max-width: 420px; }
.login-card {
  width: 100%;
  background: var(--surface); border-radius: var(--radius);
  padding: 28px; border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.login-card h2 { margin-bottom: 22px; color: var(--text); font-size: 1.35rem; font-weight: 800; }
.login-card .btn { width: 100%; }
.login-hint { margin-top: 18px; font-size: 0.9rem; color: var(--text-muted); text-align: left; }
.login-hint code { background: var(--surface2); padding: 4px 8px; border-radius: var(--radius-sm); font-family: var(--font-mono); font-size: 0.85rem; }
.login-hint a { color: var(--text); font-weight: 600; text-decoration: underline; text-underline-offset: 4px; }

/* === Admin Page === */
.admin-page h1 { margin-bottom: 32px; color: var(--text); font-size: 2rem; font-weight: 800; }
.admin-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 24px; align-items: start; }
.admin-sidebar {
  position: sticky; top: calc(var(--nav-h) + 24px);
  display: flex; flex-direction: column; gap: 4px;
  padding: 10px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
}
.admin-side-link {
  color: var(--text-muted); padding: 10px 12px; border-radius: var(--radius-sm);
  font-size: 0.92rem; font-weight: 600;
}
.admin-side-link:hover, .admin-side-link.active { color: var(--text); background: var(--surface2); }
.admin-content { min-width: 0; }
.quick-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.quick-card {
  display: flex; flex-direction: column; gap: 8px;
  padding: 18px; background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); transition: all 0.2s;
}
.quick-card:hover { border-color: var(--text-muted); box-shadow: var(--shadow-sm); }
.quick-card strong { color: var(--text); }
.quick-card span { color: var(--text-muted); font-size: 0.9rem; line-height: 1.5; }
.stats-bar { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.stat-card { background: var(--bg); padding: 18px; border-radius: var(--radius-sm); text-align: left; border: 1px solid var(--border); }
.stat-card .stat-num { font-size: 2rem; font-weight: 800; font-family: var(--font-mono); color: var(--text); }
.stat-card .stat-label { display: block; margin-top: 8px; color: var(--text-muted); font-weight: 500; }

.admin-section {
  background: var(--surface); border-radius: var(--radius);
  padding: 32px; margin-bottom: 24px; border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  scroll-margin-top: calc(var(--nav-h) + 24px);
}
.admin-section h2 { color: var(--text); font-size: 1.3rem; font-weight: 700; margin-bottom: 24px; }

.admin-form { display: flex; flex-direction: column; gap: 20px; }
.inline-form { flex-direction: row; align-items: flex-end; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-size: 0.9rem; color: var(--text-muted); font-weight: 600; }
.form-group input, .form-group textarea, .form-group select {
  padding: 12px 16px; background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text); font-size: 1rem; outline: none;
  font-family: inherit; transition: all 0.2s;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--text); box-shadow: 0 0 0 1px var(--text); }
.form-group textarea { resize: vertical; min-height: 80px; }

.btn {
  padding: 12px 24px; border: none; border-radius: var(--radius-full);
  cursor: pointer; font-size: 1rem; font-weight: 600;
  transition: all 0.2s; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
}
.btn-primary { background: var(--accent); color: var(--accent-text); }
.btn-primary:hover { opacity: 0.9; transform: scale(0.98); }
.btn-secondary { background: var(--surface2); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn.disabled { opacity: 0.45; pointer-events: none; }
.btn-danger { background: var(--danger); color: #FFF; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-sm { padding: 6px 14px; font-size: 0.85rem; border-radius: var(--radius-sm); }

/* Admin wallpaper list */
.admin-list { display: flex; flex-direction: column; gap: 12px; }
.batch-form { display: flex; flex-direction: column; gap: 14px; }
.batch-toolbar {
  display: flex; align-items: flex-end; gap: 10px; flex-wrap: wrap;
  padding: 12px; background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius);
}
.check-label, .admin-check {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--text-muted); font-size: 0.9rem; font-weight: 600;
}
.admin-check { align-self: stretch; padding-top: 4px; }
.check-label input, .admin-check input { width: 16px; height: 16px; accent-color: var(--accent); }
.batch-input {
  min-width: 180px; padding: 10px 12px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text); font: inherit;
}
.batch-input.wide { min-width: 260px; flex: 1; }
.admin-item {
  display: flex; gap: 20px; align-items: center;
  padding: 16px; background: var(--bg); border-radius: var(--radius);
  border: 1px solid var(--border); transition: all 0.2s;
}
.admin-item:hover { border-color: var(--text-muted); }
.admin-thumb { flex-shrink: 0; }
.admin-thumb img { width: 80px; height: 60px; object-fit: cover; border-radius: var(--radius-sm); }
.admin-item-info { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.admin-meta { font-size: 0.85rem; color: var(--text-muted); font-family: var(--font-mono); }
.admin-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.admin-item-actions { display: flex; gap: 8px; flex-shrink: 0; }
.admin-user-form { display: flex; align-items: flex-end; gap: 14px; width: 100%; }
.compact-row { grid-template-columns: minmax(160px, 1fr) 140px minmax(160px, 1fr); gap: 12px; }
.admin-toolbar {
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; margin-bottom: 16px; flex-wrap: wrap;
}
.admin-filter-form {
  display: flex; align-items: flex-end; gap: 10px; flex-wrap: wrap;
}
.image-filter-form { margin-bottom: 18px; }
.admin-hint { color: var(--text-muted); font-size: 0.85rem; }
.import-page-form { margin-bottom: 16px; }
.inline-select {
  padding: 8px 10px; background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text); font: inherit;
}
.badge {
  display: inline-flex; align-items: center;
  padding: 4px 10px; border-radius: var(--radius-full);
  background: var(--surface2); color: var(--text); font-size: 0.75rem;
  font-weight: 600; margin-right: 6px;
}
.badge-warn { background: rgba(180, 120, 0, 0.18); color: #f5c451; }
.badge-info { background: rgba(55, 101, 145, 0.18); color: #8fd3ff; }
.pagination-row {
  display: flex; justify-content: flex-end; align-items: center; gap: 10px; margin-top: 14px;
  color: var(--text-muted); font-size: 0.85rem;
}
.load-more-row {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  margin: 28px 0 8px; color: var(--text-muted);
}
.load-more-row.loading .btn { opacity: 0.65; pointer-events: none; }

/* Modal */
.modal {
  display: none; position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
  align-items: center; justify-content: center;
}
.modal-content {
  background: var(--surface); border-radius: var(--radius-lg);
  padding: 32px; max-width: 500px; width: 90%; border: 1px solid var(--border);
  position: relative; box-shadow: var(--shadow-lg);
}
.modal-content h2 { margin-bottom: 24px; color: var(--text); font-weight: 800; }
.modal-close {
  position: absolute; top: 16px; right: 20px;
  font-size: 1.5rem; cursor: pointer; color: var(--text-muted);
}
.modal-close:hover { color: var(--text); }
.modal .form-group { margin-bottom: 20px; }

/* Alerts */
.alert { padding: 16px; border-radius: var(--radius-sm); margin-bottom: 20px; font-size: 0.95rem; font-weight: 500; }
.alert-success { background: rgba(16, 185, 129, 0.1); color: #10B981; border: 1px solid rgba(16, 185, 129, 0.2); }
.alert-error { background: rgba(239, 68, 68, 0.1); color: var(--danger); border: 1px solid rgba(239, 68, 68, 0.2); }

/* Empty state */
.empty-state { text-align: center; padding: 80px 24px; background: var(--surface); border-radius: var(--radius-lg); border: 1px dashed var(--border); }
.empty-state h2 { color: var(--text); margin-bottom: 12px; font-weight: 700; font-size: 1.5rem; }
.empty-state p { color: var(--text-muted); margin-bottom: 24px; font-size: 1.05rem; }
.empty-state a { display: inline-block; padding: 10px 24px; background: var(--accent); color: var(--accent-text); border-radius: var(--radius-full); font-weight: 600; }

/* Error page */
.error-page { text-align: center; padding: 100px 24px; }
.error-page h1 { font-size: 6rem; color: var(--text); margin-bottom: 16px; font-weight: 900; font-family: var(--font-mono); }
.error-page p { color: var(--text-muted); margin-bottom: 32px; font-size: 1.2rem; }
.error-page a { display: inline-block; padding: 12px 32px; background: var(--accent); color: var(--accent-text); border-radius: var(--radius-full); font-weight: 600; }

/* === Responsive === */
@media (max-width: 900px) {
  .main-content { padding: 28px 18px; }
  .browse-header { margin-bottom: 32px; }
  .detail-main { grid-template-columns: 1fr; }
  .detail-image-wrap { padding: 10px; }
  .detail-sidebar { gap: 18px; }
  .admin-layout { grid-template-columns: 1fr; }
  .admin-sidebar { position: static; flex-direction: row; overflow-x: auto; }
  .admin-side-link { white-space: nowrap; }
  .login-page { grid-template-columns: 1fr; gap: 24px; }
  .wallpaper-masonry { columns: 3 210px; column-gap: 14px; }
  .masonry-item { margin-bottom: 14px; }
  .masonry-overlay {
    opacity: 1;
    padding: 12px;
    background: linear-gradient(to top, rgba(0,0,0,0.52), rgba(0,0,0,0.08) 42%, transparent 72%);
  }
  .overlay-stats {
    align-self: flex-end; gap: 8px; padding: 6px 8px;
    border-radius: var(--radius); background: rgba(0,0,0,0.46);
    backdrop-filter: blur(8px); font-size: 0.86rem;
  }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .main-content { padding: 20px 12px; }
  .navbar { height: 60px; }
  :root { --nav-h: 60px; }
  .nav-links { display: none; position: absolute; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; background: rgba(var(--bg-rgb), 0.95); backdrop-filter: blur(16px); padding: 16px;
    border-bottom: 1px solid var(--border); gap: 16px;
  }
  .nav-links.open { display: flex; }
  .nav-user { margin-left: 0; text-align: center; width: 100%; }
  .nav-toggle { display: block; }
  .search-bar { margin-bottom: 16px; }
  .search-bar input { padding: 13px 88px 13px 14px; }
  .search-bar button { padding: 0 18px; }
  .browse-header { align-items: stretch; text-align: left; margin-bottom: 22px; }
  .hero-title { margin-bottom: 8px; }
  .hero-subtitle { margin-bottom: 18px; }
  .announcement-board { padding: 14px; margin-bottom: 16px; }
  .sort-group { border-radius: var(--radius); justify-content: flex-start; overflow-x: auto; flex-wrap: nowrap; }
  .sort-btn { white-space: nowrap; padding: 8px 13px; }
  .tag-cloud { max-height: 120px; overflow: auto; justify-content: flex-start; padding-bottom: 2px; }
  .wallpaper-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .grid-thumb { aspect-ratio: 4/5; }
  .grid-stats { gap: 7px; padding: 5px 7px; font-size: 0.76rem; }
  .grid-info { right: 6px; bottom: 6px; }
  .wallpaper-masonry {
    columns: 2 132px;
    column-gap: 8px;
  }
  .masonry-item {
    margin-bottom: 8px;
    border-radius: var(--radius-sm);
    border-color: transparent;
    box-shadow: none;
  }
  .masonry-item:hover { box-shadow: none; }
  .masonry-item:hover img { transform: none; }
  .masonry-overlay {
    opacity: 1;
    padding: 6px;
    background: linear-gradient(to top, rgba(0,0,0,0.50), transparent 48%);
  }
  .overlay-stats {
    gap: 7px; padding: 5px 6px;
    font-size: 0.75rem; line-height: 1;
    border-radius: var(--radius-sm);
  }
  .overlay-stats .icon, .grid-stats .icon { width: 0.95em; height: 0.95em; }
  .list-item { gap: 12px; padding: 10px; }
  .list-thumb img { width: 92px; height: 92px; }
  .list-tags { display: none; }
  .list-stats { gap: 12px; font-size: 0.82rem; }
  .list-title, .masonry-overlay h3 { display: none; }
  .detail-page { max-width: none; }
  .back-link { margin-bottom: 14px; padding: 7px 10px; }
  .detail-main { gap: 16px; }
  .detail-image-wrap { padding: 0; background: transparent; border: 0; box-shadow: none; }
  .detail-image { max-height: none; border-radius: var(--radius); }
  .detail-title { font-size: 1.45rem; }
  .detail-actions { grid-template-columns: 1fr; }
  .detail-meta { padding-top: 14px; }
  .image-viewer { padding: 116px 8px 8px; }
  .image-viewer-bar {
    min-height: 104px; align-items: flex-start; flex-direction: column;
    padding: 10px; gap: 8px;
  }
  .image-viewer-actions { width: 100%; gap: 6px; justify-content: flex-start; }
  .image-viewer-actions .btn { padding: 6px 9px; font-size: 0.78rem; }
  .viewer-scale { min-width: 42px; font-size: 0.75rem; }
  .inline-form { flex-direction: column; align-items: stretch; }
  .admin-user-form { flex-direction: column; align-items: stretch; }
  .compact-row { grid-template-columns: 1fr; }
  .detail-stats { grid-template-columns: 1fr; }
  .sort-group { width: 100%; justify-content: flex-start; }
  .page-header { align-items: flex-start; flex-direction: column; gap: 16px; }
  .hero-title { font-size: 2rem; }
  .hero-subtitle { font-size: 1rem; }
}

/* === Additions: nav form, hero actions, related wallpapers, admin extras === */
.nav-form { display: inline-flex; margin: 0; }
.nav-link-button { border: 0; background: none; font: inherit; cursor: pointer; }
.hero-actions { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; justify-content: center; }
.detail-actions-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.related-section { margin-top: 56px; }
.related-title { font-size: 1.25rem; margin-bottom: 18px; }
.admin-tag-item { align-items: center; }
.admin-tag-item .admin-item-actions { flex-wrap: wrap; }
.inline-input {
  padding: 7px 10px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--text); font: inherit; max-width: 200px;
}
.check-label {
  display: flex; gap: 8px; align-items: center;
  font-size: 0.9rem; color: var(--text-muted); margin-top: 8px;
}
.modal-content { position: relative; }
.modal-close {
  position: absolute; top: 12px; right: 16px; border: 0; background: none;
  font-size: 1.6rem; line-height: 1; color: var(--text-muted); cursor: pointer;
}
@media (max-width: 640px) {
  .detail-actions-grid { grid-template-columns: 1fr; }
}