:root {
  --bg: #111111;
  --bg-card: #1a1a1a;
  --bg-elevated: #222222;
  --text: #f5f5f5;
  --text-secondary: #888888;
  --text-muted: #555555;
  --border: #2a2a2a;
  --accent: #ffffff;
  --free: #4ade80;
  --free-bg: #1a5c2a;
  --premium: #fbbf24;
  --premium-bg: #5c3d1a;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body { padding-top: 64px; }

.noise {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  opacity: 0.03;
  pointer-events: none;
  z-index: 9999;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* Navigation */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(17, 17, 17, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}

.nav-logo { width: 32px; height: 32px; border-radius: 8px; }

.nav-name {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.3px;
}

.nav-center { display: flex; gap: 32px; }

.nav-center a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}

.nav-center a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--text);
  transition: width var(--transition);
}

.nav-center a:hover, .nav-center a.active { color: var(--text); }
.nav-center a:hover::after, .nav-center a.active::after { width: 100%; }

/* Search section */
.search-section {
  padding: 64px 0 8px;
  position: relative;
  z-index: 1;
}

.search-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  transition: border-color var(--transition);
}

.search-bar:focus-within {
  border-color: var(--text-muted);
}

.search-bar input {
  flex: 1;
  background: none;
  border: none;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
}

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

.search-results-inline {
  max-width: 560px;
  margin: 8px auto 0;
  display: none;
  flex-direction: column;
  gap: 4px;
}

.search-results-inline.open { display: flex; }

.search-result-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  transition: background var(--transition);
}

.search-result-row:hover { background: var(--bg-elevated); }

.search-result-row img {
  width: 48px;
  height: 27px;
  object-fit: cover;
  border-radius: 6px;
  flex-shrink: 0;
}

.search-result-row-info { flex: 1; min-width: 0; }

.search-result-row-info h4 {
  font-size: 0.85rem;
  font-weight: 500;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-result-row-info p {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 2px 0 0;
}

.search-no-result {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 24px;
}



.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 40px;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--text);
  color: var(--bg);
}

.btn-primary:hover {
  background: #e0e0e0;
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-elevated);
  border-color: var(--text-muted);
  transform: translateY(-2px);
}

/* Sections */
.section { padding: 40px 0; }

#categories { padding-bottom: 0; padding-top: 24px; }

#gallery { padding-top: 48px; }

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.section-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.5px;
}

.count {
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.category-card {
  position: relative;
  height: 150px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-size: cover;
  background-position: center;
  text-decoration: none;
  display: flex;
  align-items: flex-end;
  transition: all var(--transition);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}

.category-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0.05) 50%, rgba(0,0,0,0.2) 100%);
  transition: background var(--transition);
}

.category-card:hover::before {
  background: linear-gradient(0deg, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.1) 50%, rgba(0,0,0,0.3) 100%);
}

.category-name {
  position: relative;
  z-index: 1;
  padding: 18px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.5px;
}

/* Gallery Grid */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.wallpaper-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.wallpaper-card:hover {
  transform: translateY(-4px);
  border-color: var(--border);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.card-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  flex-shrink: 0;
  background: #1a1a1a;
}

.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}

.card-img img[src=""],
.card-img img.error {
  display: none;
}

.card-img.img-error::after {
  content: '图片加载失败';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: #555;
  font-size: 14px;
}

.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.wallpaper-card:hover .card-img img { transform: scale(1.05); }

.info {
  padding: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.info h3 {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 4px;
}

.card-tags {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Badge */
.badge {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

.badge.free { background: var(--free-bg); color: var(--free); }
.badge.premium { background: var(--premium-bg); color: var(--premium); }

/* Modal */
.modal {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal.open { display: flex; }

/* Nav auth */
.nav-right { display: flex; align-items: center; gap: 12px; }

.nav-login {
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  margin-left: 160px;
  transition: all var(--transition);
}

.nav-login:hover { color: #fff; }

.user-menu { position: relative; cursor: pointer; }

.user-name {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  background: var(--bg-elevated);
}

.user-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 160px;
  display: none;
  z-index: 50;
}

.user-menu:hover .user-dropdown,
.user-dropdown:hover { display: block; }

.user-dropdown a,
.user-dropdown button {
  display: block;
  width: 100%;
  padding: 12px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  transition: color var(--transition);
}

.user-dropdown a:hover,
.user-dropdown button:hover { color: var(--text); }

.user-dropdown button:last-child { border-top: 1px solid var(--border); color: #f87171; }



.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  box-sizing: border-box;
  transition: border-color var(--transition);
}

.form-group input:focus { border-color: var(--text-muted); }

.auth-error { color: #f87171; font-size: 0.85rem; min-height: 20px; margin-bottom: 12px; }

.auth-submit { width: 100%; justify-content: center; margin-top: 16px; padding: 14px; font-size: 1rem; }

.modal-backdrop {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.8);
  backdrop-filter: blur(8px);
}

.modal-close {
  position: fixed;
  top: 20px; right: 20px;
  z-index: 210;
  background: rgba(0,0,0,0.6);
  border: none;
  color: white;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition);
}

.modal-close:hover { background: rgba(255,255,255,0.25); }

.modal-layout {
  position: relative;
  display: flex;
  width: 100vw;
  height: 100vh;
  z-index: 1;
}

.modal-image {
  flex: 1;
  min-width: 0;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-image img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 4px;
}

.modal-sidebar {
  width: 380px;
  min-width: 380px;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  border-left: 1px solid var(--border);
}

.modal-info {
  padding: 32px 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-meta {
  display: flex;
  gap: 12px;
  align-items: center;
}

.modal-similar {
  padding: 0 28px 32px;
}

.similar-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.similar-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.similar-card {
  cursor: pointer;
  border-radius: 8px;
  overflow: hidden;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.similar-card:hover {
  border-color: var(--border);
  transform: translateY(-2px);
}

.similar-card img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  display: block;
}

.similar-card-info {
  padding: 8px 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.similar-card-info h4 {
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.similar-card-info .badge {
  font-size: 0.65rem;
  padding: 2px 8px;
}

.modal-category {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.modal-info h2 {
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: -0.5px;
}

.modal-info p {
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: 0.95rem;
}

.modal-actions {
  display: flex;
  gap: 12px;
  flex-direction: column;
}

.modal-actions .btn-primary,
.modal-actions .btn-secondary {
  justify-content: center;
  width: 100%;
}

.modal-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.detail-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.detail-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}

.search-result-item:last-child { border-bottom: none; }

.search-result-item img {
  width: 80px;
  height: 45px;
  object-fit: cover;
  border-radius: 8px;
}

.search-result-info h4 { font-size: 0.95rem; font-weight: 500; }
.search-result-info p { font-size: 0.8rem; color: var(--text-muted); }

/* Footer */
/* Page content (about, disclaimer) */
.page-main { margin-top: 64px; padding: 80px 0; }

.page-content { max-width: 720px; }

.page-content h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 8px;
}

.page-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 48px;
}

.page-section { margin-bottom: 40px; }

.page-section h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}

.page-section p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.page-section ul {
  color: var(--text-secondary);
  line-height: 1.8;
  padding-left: 24px;
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.contact-email {
  font-size: 1.1rem !important;
  font-weight: 600;
  margin-top: 16px;
}

.contact-email a { color: var(--text); text-decoration: none; }
.contact-email a:hover { text-decoration: underline; }

footer {
  border-top: 1px solid var(--border);
  padding: 80px 0 40px;
  margin-top: 80px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-logo { width: 40px; height: 40px; border-radius: 10px; margin-bottom: 12px; }

.footer-tagline {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-col h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 10px;
  transition: color var(--transition);
}

.footer-col a:hover { color: var(--text); }

.footer-bottom {
  grid-column: 1 / -1;
  padding-top: 40px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-disclaimer {
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-disclaimer a {
  color: var(--text-secondary);
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 900px) {
  .modal-content { flex-direction: column; }
  .modal-image { max-height: 50vh; }
  .modal-info { width: 100%; min-width: 0; padding: 24px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .nav-center { display: none; }
}

@media (max-width: 600px) {
  .gallery { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .modal { padding: 0; }
  .modal-content { border-radius: 0; min-height: 100vh; max-height: 100vh; }
}