:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-soft: rgba(37, 99, 235, 0.08);
  --accent: #f7f9ff;
  --accent-strong: #eef2ff;
  --text: #0f172a;
  --text-light: #475569;
  --border: rgba(37, 99, 235, 0.12);
  --card-bg: #ffffff;
  --shadow: 0 12px 40px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Noto Sans SC', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% 20%, rgba(37, 99, 235, 0.08), transparent 32%),
    radial-gradient(circle at 80% 0%, rgba(124, 58, 237, 0.08), transparent 30%),
    linear-gradient(160deg, #f6f7fb 0%, #f9fbff 45%, #ffffff 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--primary);
}

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
}

.brand-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: linear-gradient(135deg, #60a5fa, #2563eb);
  color: #fff;
  font-size: 1.5rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-size: 1.05rem;
}

.brand-tagline {
  font-size: 0.75rem;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.95rem;
}

.nav-link {
  padding: 0.35rem 0;
  position: relative;
  font-weight: 500;
  color: var(--text-light);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 2px;
  background: linear-gradient(135deg, #60a5fa, #2563eb);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--primary);
}

.nav-link:hover::after,
.nav-link:focus::after {
  transform: scaleX(1);
}

.mobile-toggle {
  display: none;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--primary);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
}

.mobile-menu {
  border-top: 1px solid rgba(226, 232, 240, 0.7);
  padding: 1rem 5vw 1.5rem;
  background: rgba(255, 255, 255, 0.98);
}

.mobile-nav {
  display: grid;
  gap: 0.75rem;
}

.mobile-nav-link {
  padding: 0.65rem 1rem;
  border-radius: 12px;
  background: rgba(37, 99, 235, 0.08);
  font-weight: 500;
}

.hero {
  position: relative;
  padding: 6rem 0 4.5rem;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 10%, rgba(37, 99, 235, 0.12), transparent 28%),
    radial-gradient(circle at 80% 0%, rgba(124, 58, 237, 0.12), transparent 30%),
    linear-gradient(120deg, rgba(37, 99, 235, 0.08), rgba(124, 58, 237, 0.06));
  opacity: 0.6;
  pointer-events: none;
}

.hero-layout {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 3.5rem;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(2.2rem, 4vw, 3rem);
  margin: 0 0 1.25rem;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 1.1rem;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.12);
}

.hero-description {
  color: var(--text-light);
  font-size: 1.05rem;
  line-height: 1.85;
  margin-bottom: 1.75rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #fff;
  box-shadow: 0 18px 40px rgba(37, 99, 235, 0.25);
}

.btn-secondary {
  background: rgba(37, 99, 235, 0.12);
  color: var(--primary-dark);
  border: 1px solid rgba(37, 99, 235, 0.2);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(37, 99, 235, 0.2);
}

.hero-stats {
  display: flex;
  gap: 1.75rem;
  margin-top: 2.25rem;
  padding: 1.5rem 1.6rem;
  background: rgba(255, 255, 255, 0.82);
  border-radius: 24px;
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.12);
  border: 1px solid rgba(37, 99, 235, 0.12);
}

.stat-item dt {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 0.35rem;
}

.stat-item dd {
  margin: 0;
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--primary);
}

.hero-panel {
  display: grid;
  gap: 1.75rem;
}

.quick-search {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.86));
  border-radius: 24px;
  padding: 2rem;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.18);
  border: 1px solid rgba(37, 99, 235, 0.12);
  backdrop-filter: blur(6px);
}

.quick-header h2 {
  margin: 0 0 0.35rem;
}

.quick-subtitle {
  margin: 0;
  color: var(--text-light);
  font-size: 0.9rem;
}

.quick-tabs {
  display: flex;
  gap: 0.75rem;
  margin: 1.5rem 0 1rem;
}

.quick-tab {
  flex: 1;
  border: none;
  background: var(--primary-soft);
  color: var(--primary-dark);
  padding: 0.6rem 0.5rem;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease, color 0.2s ease;
}

.quick-tab.active {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #fff;
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.25);
}

.quick-tab:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.3);
  outline-offset: 2px;
}

.quick-field {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: #f8fafc;
  border-radius: 16px;
  padding: 0.35rem 0.75rem;
  border: 1px solid rgba(37, 99, 235, 0.12);
}

.quick-field input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 0.95rem;
  padding: 0.65rem 0.35rem;
  outline: none;
}

.quick-icon {
  font-size: 1.1rem;
}

.quick-hint {
  margin: 0.75rem 0 0;
  font-size: 0.85rem;
  color: var(--text-light);
}

.quick-results {
  margin-top: 1.25rem;
  border-radius: 16px;
  background: rgba(37, 99, 235, 0.05);
  padding: 1rem;
  display: grid;
  gap: 0.75rem;
}

.quick-placeholder {
  margin: 0;
  color: var(--text-light);
  font-size: 0.9rem;
}

.quick-result-item {
  display: grid;
  gap: 0.25rem;
  padding: 0.75rem;
  border-radius: 12px;
  background: #fff;
  border: 1px solid rgba(37, 99, 235, 0.12);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.quick-result-item:hover,
.quick-result-item:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(37, 99, 235, 0.15);
  outline: none;
}

.quick-result-title {
  font-weight: 600;
}

.quick-result-meta {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-light);
}

.quick-links {
  display: grid;
  gap: 0.75rem;
}

.quick-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(37, 99, 235, 0.12);
  border-radius: 16px;
  padding: 0.75rem 1rem;
  font-weight: 600;
  color: var(--primary-dark);
}

.quick-link:hover {
  background: rgba(37, 99, 235, 0.2);
}

.feature-grid {
  padding: 1rem 0 3rem;
}

.feature-row {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.feature-card {
  display: grid;
  gap: 0.65rem;
  padding: 1.4rem 1.5rem;
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.84));
  border: 1px solid rgba(37, 99, 235, 0.12);
  box-shadow: 0 18px 38px rgba(15, 23, 42, 0.12);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 28px 60px rgba(15, 23, 42, 0.16);
}

.feature-icon {
  font-size: 1.45rem;
  background: rgba(37, 99, 235, 0.12);
  color: var(--primary-dark);
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
}

.feature-text h3 {
  margin: 0;
  font-size: 1.05rem;
}

.feature-text p {
  margin: 0;
  color: var(--text-light);
  line-height: 1.6;
}

.feature-link {
  color: var(--primary);
  font-weight: 700;
  display: inline-flex;
  gap: 0.35rem;
  align-items: center;
}

.feature-link::after {
  content: '→';
  transition: transform 0.2s ease;
}

.feature-card:hover .feature-link::after {
  transform: translateX(4px);
}

.search-section {
  padding: 4.5rem 0;
}

.search-section.accent {
  background: var(--accent);
}

.tiered-libraries {
  padding: 4.75rem 0;
}

.tiered-meta {
  max-width: 260px;
  text-align: left;
}

.tiered-controls {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.tiered-tab {
  border: 1px solid rgba(37, 99, 235, 0.2);
  background: rgba(255, 255, 255, 0.85);
  border-radius: 999px;
  padding: 0.65rem 1.4rem;
  font-weight: 600;
  color: var(--text-light);
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.15);
}

.tiered-tab:hover,
.tiered-tab:focus {
  color: var(--primary);
  border-color: rgba(37, 99, 235, 0.45);
}

.tiered-tab.active {
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 16px 32px rgba(79, 70, 229, 0.35);
}

.tiered-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.tier-card {
  background: var(--card-bg);
  border-radius: 22px;
  padding: 1.6rem;
  border: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: 0 20px 48px rgba(15, 23, 42, 0.1);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 100%;
}

.tier-card__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
}

.tier-card__header h3 {
  margin: 0;
  font-size: 1.15rem;
}

.tier-card__city {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(37, 99, 235, 0.1);
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
}

.tier-card__intro {
  margin: 0;
  color: var(--text-light);
  line-height: 1.6;
}

.tier-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tier-card__tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.12);
  color: var(--primary-dark);
  font-size: 0.75rem;
  font-weight: 600;
}

.tier-card__info {
  margin: 0;
  padding: 0;
  color: var(--text-light);
  display: grid;
  gap: 0.45rem;
  font-size: 0.9rem;
}

.tier-card__info li {
  list-style: none;
}

.tier-card__actions {
  margin-top: auto;
}

.tier-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
  color: var(--primary);
}

.tier-card__link::after {
  content: '→';
  font-size: 0.85rem;
}

.tier-card__link:hover,
.tier-card__link:focus {
  color: var(--primary-dark);
}

.featured-libraries {
  padding: 4.75rem 0 4.25rem;
  background: linear-gradient(145deg, rgba(99, 102, 241, 0.06), rgba(37, 99, 235, 0.03));
}

.section-meta-box {
  align-self: center;
  background: rgba(37, 99, 235, 0.12);
  color: var(--primary-dark);
  border-radius: 18px;
  padding: 0.85rem 1.5rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.08);
}

.section-meta-box span {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--primary);
}

.region-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
}

.region-card {
  background: var(--card-bg);
  border-radius: 22px;
  padding: 1.75rem;
  box-shadow: 0 28px 60px rgba(15, 23, 42, 0.1);
  border: 1px solid rgba(148, 163, 184, 0.16);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.region-card__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.region-card__header h3 {
  margin: 0;
  font-size: 1.25rem;
}

.region-card__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.12);
  color: var(--primary-dark);
  font-weight: 600;
  font-size: 0.85rem;
}

.featured-library-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.featured-library {
  background: rgba(37, 99, 235, 0.06);
  border-radius: 18px;
  padding: 1.1rem 1.25rem;
  border: 1px solid rgba(37, 99, 235, 0.1);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.4);
}

.featured-library__title {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
}

.featured-library__title h4 {
  margin: 0;
  font-size: 1.05rem;
}

.featured-library__title span {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.75rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.18);
  color: var(--primary-dark);
  font-weight: 600;
  font-size: 0.85rem;
}

.featured-library__meta {
  margin: 0.55rem 0 0;
  color: var(--text-light);
  font-size: 0.92rem;
  line-height: 1.55;
}

.featured-library__meta:first-of-type {
  margin-top: 0.65rem;
}

.featured-library__meta a {
  color: var(--primary-dark);
  font-weight: 600;
}

.featured-library__meta a:hover {
  text-decoration: underline;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.section-eyebrow {
  margin: 0;
  color: var(--primary);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.section-header h2 {
  margin: 0.75rem 0 0.85rem;
  font-size: clamp(1.75rem, 2.5vw, 2.2rem);
}

.section-description {
  margin: 0;
  color: var(--text-light);
  line-height: 1.7;
}

.section-link {
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  color: var(--primary);
  gap: 0.35rem;
}

.section-link::after {
  content: '→';
  font-size: 0.9rem;
  transition: transform 0.2s ease;
}

.section-link:hover::after,
.section-link:focus::after {
  transform: translateX(4px);
}

.books-section,
.authors-highlight {
  padding: 4.5rem 0;
}

.books-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.input-field {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 16px;
  padding: 1rem 1.25rem;
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.08);
}

.input-field span {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light);
  letter-spacing: 0.03em;
}

.input-field input,
.input-field select {
  border: none;
  outline: none;
  font-size: 0.95rem;
  padding: 0.65rem 0.75rem;
  border-radius: 12px;
  background: rgba(241, 245, 249, 0.65);
  transition: box-shadow 0.2s ease, background 0.2s ease;
}

.input-field input:focus,
.input-field select:focus {
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
  background: #fff;
}

.result-caption {
  margin: 0 0 1.75rem;
  color: var(--text-light);
  font-weight: 500;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
}

.authors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.author-highlight-card {
  background: var(--card-bg);
  border-radius: 22px;
  padding: 1.75rem;
  border: 1px solid rgba(37, 99, 235, 0.1);
  box-shadow: 0 18px 32px rgba(15, 23, 42, 0.08);
  display: grid;
  gap: 1rem;
}

.author-highlight-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.author-highlight-emoji {
  font-size: 2rem;
  line-height: 1;
}

.author-highlight-meta h3 {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
}

.author-highlight-meta p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-light);
}

.author-highlight-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.author-highlight-tags span {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.12);
  color: var(--primary-dark);
  font-size: 0.8rem;
  font-weight: 600;
}

.author-highlight-body {
  margin: 0;
  color: var(--text-light);
  line-height: 1.6;
}

.author-highlight-body strong {
  color: var(--text);
  font-weight: 600;
}

.author-highlight-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--primary-dark);
  font-weight: 600;
  text-decoration: none;
}

.author-highlight-link::after {
  content: "↗";
  font-size: 1rem;
  transition: transform 0.2s ease;
}

.author-highlight-link:hover::after {
  transform: translateX(2px);
}

.section-meta-box {
  flex-direction: column;
  align-items: flex-start;
  gap: 0.6rem;
}

.section-meta-box strong {
  font-size: 1.85rem;
  color: var(--primary);
}

.books-meta .section-link,
.authors-meta .section-link {
  font-size: 0.95rem;
  color: var(--primary-dark);
}
}

.search-controls {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.search-field {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: #fff;
  flex: 1;
  min-width: 220px;
}

.search-field input {
  border: none;
  outline: none;
  font-size: 0.95rem;
  flex: 1;
  background: transparent;
}

select {
  padding: 0.7rem 1rem;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: #fff;
  min-width: 160px;
  font-size: 0.95rem;
}

.results-meta {
  color: var(--text-light);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.library-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.pagination-btn {
  min-width: 44px;
  padding: 0.6rem 1.05rem;
  border-radius: 999px;
  border: 1px solid rgba(59, 130, 246, 0.35);
  background: rgba(255, 255, 255, 0.95);
  color: var(--text-dark);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.18);
}

.pagination-btn:hover:not([disabled]) {
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(79, 70, 229, 0.35);
}

.pagination-btn.active {
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 18px 40px rgba(79, 70, 229, 0.35);
}

.pagination-btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.info-card {
  background: var(--card-bg);
  border-radius: 20px;
  padding: 1.5rem;
  border: 1px solid rgba(37, 99, 235, 0.1);
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.08);
  display: grid;
  gap: 0.9rem;
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.info-card h3 {
  margin: 0;
  font-size: 1.1rem;
  flex: 1;
}

.info-card .tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.12);
  color: var(--primary-dark);
  font-size: 0.8rem;
  font-weight: 600;
}

.info-card p {
  margin: 0;
  color: var(--text-light);
  line-height: 1.6;
}

.info-card ul {
  padding: 0;
  margin: 0;
  list-style: none;
  display: grid;
  gap: 0.35rem;
  color: var(--text-light);
  font-size: 0.9rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.info-card a {
  color: var(--primary);
  font-weight: 600;
}

.empty-state {
  grid-column: 1 / -1;
  padding: 2rem;
  border-radius: 20px;
  border: 1px dashed rgba(37, 99, 235, 0.3);
  background: rgba(255, 255, 255, 0.7);
  text-align: center;
  color: var(--text-light);
}

.resource-section {
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.06), rgba(255, 255, 255, 0.92));
  padding: 4.25rem 0;
}

.resource-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.resource-card {
  background: #fff;
  border-radius: 20px;
  padding: 1.9rem;
  border: 1px solid rgba(37, 99, 235, 0.12);
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.12);
  display: grid;
  gap: 0.9rem;
  position: relative;
  overflow: hidden;
}

.resource-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(37, 99, 235, 0.08), transparent 45%);
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.resource-card:hover::after {
  opacity: 1;
}

.resource-card h3 {
  margin: 0;
  position: relative;
  z-index: 1;
}

.resource-card p {
  margin: 0;
  color: var(--text-light);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

.resource-link {
  color: var(--primary);
  font-weight: 700;
  position: relative;
  z-index: 1;
}

.site-footer {
  background: #0f172a;
  color: rgba(226, 232, 240, 0.95);
  padding: 3rem 0 2rem;
}

.footer-layout {
  display: flex;
  justify-content: space-between;
  gap: 3rem;
  flex-wrap: wrap;
}

.footer-brand {
  margin: 0 0 0.75rem;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.5rem;
}

.footer-links h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  color: #bfdbfe;
}

.footer-links ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.footer-links a {
  color: rgba(226, 232, 240, 0.8);
  font-size: 0.9rem;
}

.footer-copy {
  text-align: center;
  margin-top: 2rem;
  color: rgba(226, 232, 240, 0.5);
  font-size: 0.85rem;
}

@media (max-width: 960px) {
  .nav-links {
    display: none;
  }

  .mobile-toggle {
    display: inline-flex;
  }

  .hero-layout {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    order: -1;
  }

  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
  }

  .section-header {
    flex-direction: column;
  }

  .section-meta-box {
    align-self: flex-start;
    margin-top: 1rem;
  }

  .tiered-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tiered-meta {
    max-width: none;
  }
}

@media (max-width: 640px) {
  body {
    background: #f8fafc;
  }

  .nav-container {
    padding: 0.75rem 0;
  }

  .hero {
    padding-top: 4.25rem;
  }

  .hero-actions {
    gap: 0.75rem;
  }

  .hero-stats {
    gap: 1rem;
    padding: 1.25rem;
  }

  .quick-search {
    padding: 1.5rem;
  }

  .region-grid {
    grid-template-columns: 1fr;
  }

  .region-card {
    padding: 1.5rem;
  }

  .featured-library {
    padding: 1rem 1.05rem;
  }

  .tiered-controls {
    gap: 0.6rem;
  }

  .tiered-grid {
    grid-template-columns: 1fr;
  }

  .tier-card {
    padding: 1.35rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .resource-grid {
    grid-template-columns: 1fr;
  }

  .footer-layout {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}