:root {
  --bg-primary: #020c12;
  --bg-card: #071a24;
  --accent: #b81c1c;
  --accent-cta-bg: #b81c1c;
  --accent-cta-text: #ffffff;
  --text-on-dark-primary: #f4f6f7;
  --text-on-dark-secondary: #8fa3ac;
  --text-on-dark-muted: #728790;
  --text-on-card-primary: #f4f6f7;
  --text-on-card-secondary: #8fa3ac;
  --text-on-card-muted: #728790;
  --link-on-card: #ff6b5b;
  --card-shadow: none;
  --card-border: 1px solid #0f2a38;
  --border-subtle-on-dark: #0f2a38;
  --border-subtle-on-card: #0f2a38;
  --badge-live-bg: #1f6feb;
  --badge-live-text: #ffffff;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang HK", "Microsoft JhengHei", sans-serif;
  --max-width: 960px;
  --spacing-unit: 16px;
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  background: var(--bg-primary);
  color: var(--text-on-dark-primary);
  font-family: var(--font-stack);
  line-height: 1.6;
  margin: 0;
  padding-bottom: calc(var(--spacing-unit) * 2);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-unit);
}

.section {
  padding: calc(var(--spacing-unit) * 2) 0;
}

h1, h2, h3 {
  font-family: var(--font-stack);
  line-height: 1.3;
}

h2.h2-heading {
  font-size: 1.5rem;
  border-bottom: 1px solid var(--border-subtle-on-dark);
  padding-bottom: 8px;
  margin-top: calc(var(--spacing-unit) * 2);
}

.hero-subtitle {
  color: var(--text-on-dark-secondary);
  font-size: 1.1rem;
}

.site-header {
  background: #071a24;
  border-bottom: 1px solid var(--border-subtle-on-dark);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: bold;
  font-size: 1.15rem;
  color: var(--text-on-dark-primary);
  text-decoration: none;
}

.site-logo svg {
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  gap: 4px;
}

.site-nav a {
  color: var(--text-on-dark-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  padding: 8px 14px;
  border-radius: 6px;
  transition: background .15s, color .15s;
}

.site-nav a:hover,
.site-nav a.active {
  background: rgba(184, 28, 28, .18);
  color: var(--text-on-dark-primary);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle-on-dark);
  border-radius: 6px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  color: var(--text-on-dark-primary);
  cursor: pointer;
}

.site-nav-mobile {
  display: none;
  flex-direction: column;
  background: #071a24;
  border-bottom: 1px solid var(--border-subtle-on-dark);
}

.site-nav-mobile.open {
  display: flex;
}

.site-nav-mobile a {
  color: var(--text-on-dark-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 14px var(--spacing-unit);
  border-top: 1px solid var(--border-subtle-on-dark);
}

.site-nav-mobile a.active {
  color: var(--text-on-dark-primary);
  background: rgba(184, 28, 28, .18);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(184, 28, 28, .15);
  border: 1px solid rgba(184, 28, 28, .4);
  color: #ff9d8f;
  font-size: 0.8rem;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
}

.status-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #ff9d8f;
}

.icon-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-unit);
}

.icon-card {
  background: var(--bg-card);
  border-radius: 8px;
  padding: var(--spacing-unit);
  box-shadow: var(--card-shadow);
  border: 1px solid transparent;
  transition: transform .15s, border-color .15s;
}

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

.icon-card .icon-wrap {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: rgba(184, 28, 28, .12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  color: var(--link-on-card);
}

.icon-card h3 {
  margin: 0 0 4px;
  color: var(--text-on-card-primary);
  font-size: 1rem;
}

.icon-card p {
  margin: 0;
  color: var(--text-on-card-secondary);
  font-size: 0.85rem;
}

@media (max-width: 640px) {
  .site-nav {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .icon-card-grid {
    grid-template-columns: 1fr;
  }
  .hero-cta-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .hero-cta-group .cta-button {
    text-align: center;
  }
}

.teaching-card h2.h2-heading {
  border-bottom-color: var(--border-subtle-on-card);
}

.teaching-card {
  background: var(--bg-card);
  color: var(--text-on-card-primary);
  border-radius: 8px;
  padding: var(--spacing-unit);
  margin-bottom: var(--spacing-unit);
  box-shadow: var(--card-shadow);
  border: var(--card-border);
}

.teaching-card p a {
  color: var(--link-on-card);
}

.blog-list-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--spacing-unit);
  align-items: start;
  text-decoration: none;
}

.blog-list-item img {
  width: 160px;
  height: 120px;
  object-fit: cover;
  border-radius: 4px;
}

.blog-list-item h2 {
  margin: 0 0 6px;
  color: var(--text-on-card-primary);
}

.blog-list-item p {
  margin: 0;
  color: var(--text-on-card-secondary);
}

.blog-list-item time {
  display: block;
  font-size: 0.8rem;
  color: var(--text-on-card-muted);
  margin-top: 6px;
}

@media (max-width: 600px) {
  .blog-list-item {
    grid-template-columns: 1fr;
  }
  .blog-list-item img {
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 3;
  }
}

.teaching-card img {
  max-width: 100%;
  max-height: 420px;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 4px;
}

.article-body {
  background: var(--bg-card);
  color: var(--text-on-card-primary);
  border-radius: 8px;
  padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
  box-shadow: var(--card-shadow);
  border: var(--card-border);
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.article-body .article-section:last-child {
  margin-bottom: 0;
}

.article-body h2.h2-heading {
  border-bottom-color: var(--border-subtle-on-card);
}

.h3-heading {
  font-size: 1.15rem;
  color: var(--text-on-card-primary);
  margin-top: calc(var(--spacing-unit) * 1.5);
  margin-bottom: 4px;
}

.article-section {
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.article-section p {
  color: var(--text-on-card-secondary);
}

.article-section p a {
  color: var(--link-on-card);
}

.article-section img {
  display: block;
  max-width: 600px;
  width: 100%;
  aspect-ratio: 4 / 3;
  height: auto;
  object-fit: cover;
  border-radius: 4px;
  margin: 0 auto 14px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-unit);
  background: var(--bg-card);
  color: var(--text-on-card-primary);
  box-shadow: var(--card-shadow);
  border: var(--card-border);
}

.data-table th, .data-table td {
  border: 1px solid var(--border-subtle-on-card);
  padding: 8px 12px;
  text-align: left;
}

.data-table th {
  background: var(--border-subtle-on-card);
  color: var(--text-on-card-primary);
}

.page-meta {
  border-top: 1px solid var(--border-subtle-on-dark);
  padding-top: calc(var(--spacing-unit) * 1.5);
}

.page-meta p {
  font-size: 0.85rem;
  color: var(--text-on-dark-muted);
  margin-bottom: 8px;
}

.page-meta p a {
  color: var(--link-on-card);
}

@media (max-width: 600px) {
  .data-table--stacked, .data-table--stacked tbody, .data-table--stacked tr, .data-table--stacked td {
    display: block;
    width: 100%;
  }
  .data-table--stacked thead {
    display: none;
  }
  .data-table--stacked tr {
    margin-bottom: var(--spacing-unit);
    border: 1px solid var(--border-subtle-on-card);
    border-radius: 4px;
  }
  .data-table--stacked td {
    border: none;
    padding: 4px 12px;
  }
  .data-table--stacked td::before {
    content: attr(data-label);
    font-weight: bold;
    display: inline-block;
    width: 40%;
    color: var(--text-on-card-secondary);
  }
}

.team-matchup {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.team-matchup .team-badge {
  display: inline;
  max-width: none;
  aspect-ratio: auto;
  width: 20px;
  height: 20px;
  object-fit: contain;
  flex-shrink: 0;
  margin: 0;
  border-radius: 0;
}

.team-matchup__vs {
  color: var(--text-on-card-secondary);
  font-size: 0.85em;
}

.calc-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: var(--spacing-unit);
  padding: 16px;
  background: var(--bg-card);
  box-shadow: var(--card-shadow);
  border: var(--card-border);
  border-radius: 4px;
}

.calc-flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  border: 1px solid var(--border-subtle-on-card);
  border-radius: 4px;
  min-width: 96px;
}

.calc-flow-step--result {
  border-color: var(--accent-cta-bg);
}

.calc-flow-label {
  font-size: 0.8rem;
  color: var(--text-on-card-secondary);
}

.calc-flow-value {
  font-size: 1.1rem;
  font-weight: bold;
  color: var(--text-on-card-primary);
}

.calc-flow-step--result .calc-flow-value {
  color: var(--accent-cta-bg);
}

.calc-flow-op {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--text-on-card-secondary);
}

@media (max-width: 600px) {
  .calc-flow {
    flex-direction: column;
  }
  .calc-flow-op {
    transform: rotate(90deg);
  }
}

.faq-accordion {
  margin-bottom: var(--spacing-unit);
}

.faq-item {
  background: var(--bg-card);
  color: var(--text-on-card-primary);
  border-radius: 8px;
  box-shadow: var(--card-shadow);
  border: var(--card-border);
  padding: 12px var(--spacing-unit);
  margin-bottom: 8px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: bold;
}

.faq-item p {
  color: var(--text-on-card-secondary);
  margin-top: 8px;
}

.breadcrumb {
  font-size: 0.875rem;
  color: var(--text-on-dark-secondary);
  margin-bottom: var(--spacing-unit);
}

.breadcrumb a {
  color: var(--text-on-dark-secondary);
}

#topic-nav a {
  color: var(--text-on-dark-secondary);
}

#topic-nav a:hover {
  color: var(--text-on-dark-primary);
}

#age-gate-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 12, 18, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: var(--spacing-unit);
}

#age-gate-dialog {
  background: var(--bg-card);
  color: var(--text-on-card-primary);
  border-radius: 8px;
  box-shadow: var(--card-shadow);
  border: var(--card-border);
  max-width: 420px;
  width: 100%;
  padding: calc(var(--spacing-unit) * 1.5);
  text-align: center;
}

#age-gate-dialog h2 {
  margin: 0 0 12px;
  font-size: 1.3rem;
}

#age-gate-dialog p {
  color: var(--text-on-card-secondary);
  margin: 0 0 var(--spacing-unit);
}

#age-gate-buttons {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#age-gate-confirm {
  background: var(--accent-cta-bg);
  color: var(--accent-cta-text);
  border: none;
  border-radius: 6px;
  padding: 12px 20px;
  font-weight: bold;
  font-size: 1rem;
  cursor: pointer;
}

#age-gate-decline {
  background: transparent;
  color: var(--text-on-card-secondary);
  border: 1px solid var(--border-subtle-on-card);
  border-radius: 6px;
  padding: 10px 20px;
  font-size: 0.9rem;
  cursor: pointer;
}

.footer-columns {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--spacing-unit) * 2) var(--spacing-unit) var(--spacing-unit);
  border-top: 1px solid var(--border-subtle-on-dark);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: calc(var(--spacing-unit) * 1.5);
}

.footer-columns h3,
.footer-accordion summary {
  font-size: 0.85rem;
  color: var(--text-on-dark-secondary);
  margin: 0 0 10px;
}

.footer-columns ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-columns a {
  color: var(--text-on-dark-muted);
  font-size: 0.85rem;
  text-decoration: none;
}

.footer-columns a:hover {
  color: var(--text-on-dark-secondary);
}

.footer-accordion summary {
  cursor: default;
  list-style: none;
}

.footer-accordion summary::-webkit-details-marker {
  display: none;
}

@media (max-width: 640px) {
  .footer-columns {
    grid-template-columns: 1fr;
    padding-top: var(--spacing-unit);
  }
  .footer-accordion {
    border-bottom: 1px solid var(--border-subtle-on-dark);
  }
  .footer-accordion summary {
    cursor: pointer;
    margin: 0;
    padding: 14px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-on-dark-primary);
    font-size: 0.9rem;
  }
  .footer-accordion summary::after {
    content: "+";
    color: var(--text-on-dark-secondary);
    font-size: 1.1rem;
  }
  .footer-accordion[open] summary::after {
    content: "\2212";
  }
  .footer-accordion:not([open]) ul {
    display: none;
  }
  .footer-accordion ul {
    padding: 0 0 14px;
    gap: 10px;
  }
}

.footer-help-banner {
  max-width: var(--max-width);
  margin: 0 auto calc(var(--spacing-unit) * 1.5);
  padding: var(--spacing-unit) calc(var(--spacing-unit) * 1.5);
  background: rgba(217, 155, 26, .08);
  border: 1px solid rgba(217, 155, 26, .3);
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: var(--spacing-unit);
}

@media (max-width: 640px) {
  .footer-help-banner {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }
}

.footer-help-icon {
  font-size: 1.3rem;
  color: #d99b1a;
  flex-shrink: 0;
}

.footer-help-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}

.footer-help-text strong {
  font-size: 0.9rem;
  color: var(--text-on-dark-primary);
}

.footer-help-text span {
  font-size: 0.82rem;
  color: var(--text-on-dark-secondary);
}

.footer-help-link {
  font-size: 0.85rem;
  color: #d99b1a;
  font-weight: bold;
  text-decoration: none;
  white-space: nowrap;
}

.footer-help-link:hover {
  text-decoration: underline;
}

#compliance-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px var(--spacing-unit) 20px;
  display: flex;
  gap: 24px;
  font-size: 12px;
}

#compliance-footer a {
  color: var(--text-on-dark-muted);
}

#compliance-footer a:hover {
  color: var(--text-on-dark-secondary);
}

.badge-live {
  display: inline-block;
  background: var(--badge-live-bg);
  color: var(--badge-live-text);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 12px;
}

.badge-live:empty {
  display: none;
}

.cta-button {
  background: var(--accent-cta-bg);
  color: var(--accent-cta-text);
  display: inline-block;
  padding: 12px 24px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: bold;
}

.cta-button--on-card {
  background: transparent;
  color: var(--link-on-card);
  border: 2px solid var(--link-on-card);
  padding: 10px 22px;
}

.calc-form {
  display: grid;
  gap: 12px;
  margin: var(--spacing-unit) 0;
}

.calc-form label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.9rem;
  color: var(--text-on-card-secondary);
}

.calc-form input, .calc-form select {
  background: #f4f6f7;
  border: 1px solid #c3ccd1;
  color: #0d1b22;
  border-radius: 4px;
  padding: 8px 10px;
  font-size: 1rem;
}

.calc-form input:focus, .calc-form select:focus {
  outline: 2px solid var(--accent-cta-bg);
  outline-offset: 1px;
  border-color: var(--accent-cta-bg);
}

.calc-form button {
  background: var(--accent-cta-bg);
  color: var(--accent-cta-text);
  border: none;
  border-radius: 6px;
  padding: 10px 20px;
  font-weight: bold;
  cursor: pointer;
  justify-self: start;
}

.calc-result {
  background: var(--border-subtle-on-card);
  color: var(--text-on-card-primary);
  border: 1px solid var(--border-subtle-on-card);
  border-radius: 6px;
  padding: 12px;
  font-weight: bold;
  min-height: 1.2em;
}

.topic-nav-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-unit);
}

@media (max-width: 640px) {
  .topic-nav-grid {
    grid-template-columns: 1fr;
  }
}

.topic-nav-grid .article-section {
  background: var(--bg-card);
  border: var(--card-border);
  border-radius: 8px;
  padding: var(--spacing-unit);
  margin-bottom: 0;
}

.topic-nav-card-icon {
  width: 32px;
  height: 32px;
  color: var(--link-on-card);
  margin-bottom: calc(var(--spacing-unit) / 2);
}

.hero-banner-slot {
  width: 100%;
  aspect-ratio: 6.48 / 1;
  background: var(--bg-card);
  border: var(--card-border);
  border-radius: 8px;
  display: block;
  overflow: hidden;
  color: var(--text-on-card-muted);
  font-size: 0.85rem;
  margin-bottom: var(--spacing-unit);
}

.hero-banner-slot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

@media (max-width: 640px) {
  .hero-banner-slot {
    aspect-ratio: 2 / 1;
  }
}