:root {
  --color-primary: #181d26;
  --color-primary-active: #0d1218;
  --color-canvas: #ffffff;
  --color-surface-soft: #f8fafc;
  --color-surface-strong: #e0e2e6;
  --color-surface-dark: #181d26;
  --color-surface-dark-elevated: #1d1f25;
  --color-hairline: #dddddd;
  --color-ink: #181d26;
  --color-body: #333840;
  --color-muted: #41454d;
  --color-on-primary: #ffffff;
  --color-link: #1b61c9;
  --color-link-active: #1a3866;
  --color-signature-coral: #aa2d00;
  --color-signature-forest: #0a2e0e;
  --color-signature-cream: #f5e9d4;
  --color-signature-peach: #fcab79;
  --color-signature-mint: #a8d8c4;
  --color-signature-yellow: #f4d35e;
  --rounded-xs: 2px;
  --rounded-sm: 6px;
  --rounded-md: 10px;
  --rounded-lg: 12px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-section: 96px;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.25;
  color: var(--color-body);
  background: var(--color-canvas);
}

a {
  color: var(--color-link);
  text-decoration: none;
}

a:active {
  color: var(--color-link-active);
}

.text-link {
  color: var(--color-link);
  font-weight: 500;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-xxl);
}

.main-area {
  min-height: 50vh;
}

.top-nav {
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  position: sticky;
  top: 0;
  z-index: 40;
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: var(--space-md);
}

.wordmark {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-ink);
}

.primary-nav {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-lg);
  align-items: center;
  justify-content: flex-end;
}

.nav-list a {
  font-size: 14px;
  color: var(--color-body);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--color-hairline);
  background: var(--color-canvas);
  color: var(--color-ink);
  border-radius: var(--rounded-sm);
  padding: var(--space-xs) var(--space-sm);
  font-size: 14px;
  font-weight: 500;
}

.hero-band {
  padding: var(--space-section) 0;
  background: var(--color-canvas);
}

.hero-band h1 {
  margin: 0 0 var(--space-lg);
  font-size: 40px;
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-ink);
}

.hero-lede {
  margin: 0 0 var(--space-xl);
  max-width: 720px;
  font-size: 14px;
  line-height: 1.35;
  color: var(--color-body);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 24px;
  border-radius: var(--rounded-lg);
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-size: 16px;
  font-weight: 500;
  border: none;
  cursor: pointer;
}

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 24px;
  border-radius: var(--rounded-lg);
  background: var(--color-canvas);
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 500;
  border: 1px solid var(--color-hairline);
  cursor: pointer;
}

.btn-secondary:active {
  border-color: var(--color-muted);
}

.btn-legal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 10px;
  border-radius: var(--rounded-xs);
  background: var(--color-link);
  color: var(--color-on-primary);
  font-size: 13.12px;
  font-weight: 600;
  line-height: 1.2;
  border: none;
  cursor: pointer;
}

.btn-legal-muted {
  background: var(--color-canvas);
  color: var(--color-link);
  border: 1px solid var(--color-hairline);
}

.section {
  padding: var(--space-section) 0;
}

.section-muted {
  background: var(--color-surface-soft);
}

.section-title {
  margin: 0 0 var(--space-xl);
  font-size: 24px;
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: 0.12px;
  color: var(--color-ink);
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-lg);
}

.article-card {
  background: var(--color-canvas);
  border-radius: var(--rounded-md);
  border: 1px solid var(--color-hairline);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.article-card img {
  border-radius: var(--rounded-md);
  aspect-ratio: 16 / 9;
  object-fit: cover;
  width: 100%;
}

.article-card h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-ink);
}

.article-card p {
  margin: 0;
  flex: 1;
  font-size: 14px;
  line-height: 1.35;
  color: var(--color-body);
}

.article-meta {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-muted);
}

.signature-coral-card {
  border-radius: var(--rounded-lg);
  background: var(--color-signature-coral);
  color: var(--color-on-primary);
  padding: var(--space-xxl);
}

.signature-coral-card h2 {
  margin: 0 0 var(--space-md);
  font-size: 32px;
  font-weight: 400;
  line-height: 1.2;
}

.signature-coral-card p {
  margin: 0 0 var(--space-lg);
  max-width: 720px;
  font-size: 14px;
  line-height: 1.35;
}

.signature-forest-card {
  border-radius: var(--rounded-lg);
  background: var(--color-signature-forest);
  color: var(--color-on-primary);
  padding: var(--space-xxl);
}

.signature-forest-card h2 {
  margin: 0 0 var(--space-md);
  font-size: 32px;
  font-weight: 400;
  line-height: 1.2;
}

.signature-forest-card p {
  margin: 0 0 var(--space-lg);
  max-width: 720px;
  font-size: 14px;
  line-height: 1.35;
}

.hero-card-dark {
  border-radius: var(--rounded-lg);
  background: var(--color-surface-dark);
  color: var(--color-on-primary);
  padding: var(--space-xxl);
}

.hero-card-dark h2 {
  margin: 0 0 var(--space-md);
  font-size: 32px;
  font-weight: 400;
  line-height: 1.2;
}

.hero-card-dark p {
  margin: 0 0 var(--space-lg);
  max-width: 720px;
  font-size: 14px;
  line-height: 1.35;
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-md);
}

.demo-grid-card {
  border-radius: var(--rounded-md);
  padding: var(--space-md);
}

.demo-grid-card h3 {
  margin: 0 0 var(--space-sm);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-ink);
}

.demo-grid-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.35;
  color: var(--color-body);
}

.surface-peach {
  background: var(--color-signature-peach);
}

.surface-mint {
  background: var(--color-signature-mint);
}

.surface-yellow {
  background: var(--color-signature-yellow);
}

.cream-band {
  background: var(--color-signature-cream);
  border-radius: var(--rounded-md);
  padding: var(--space-lg);
  margin-top: var(--space-xl);
}

.cream-band h3 {
  margin: 0 0 var(--space-sm);
  font-size: 20px;
  font-weight: 400;
  color: var(--color-ink);
}

.cream-band p {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-body);
}

.cta-band-light {
  background: var(--color-surface-strong);
  border-radius: var(--rounded-lg);
  padding: var(--space-xxl);
}

.cta-band-light h2 {
  margin: 0 0 var(--space-md);
  font-size: 32px;
  font-weight: 400;
  color: var(--color-ink);
}

.cta-band-light p {
  margin: 0 0 var(--space-lg);
  max-width: 720px;
  font-size: 14px;
  line-height: 1.35;
  color: var(--color-body);
}

.form-panel {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-md);
  padding: var(--space-xl);
  max-width: 560px;
}

.form-panel h2 {
  margin: 0 0 var(--space-md);
  font-size: 24px;
  font-weight: 400;
  color: var(--color-ink);
}

.form-panel label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: var(--space-xs);
  color: var(--color-ink);
}

.input-text {
  width: 100%;
  height: 44px;
  border-radius: var(--rounded-sm);
  border: 1px solid var(--color-hairline);
  padding: 12px 16px;
  font-size: 14px;
  margin-bottom: var(--space-md);
  color: var(--color-ink);
  background: var(--color-canvas);
}

.input-text:focus {
  outline: 2px solid #458fff;
  border-color: #458fff;
}

.form-note {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: var(--space-sm);
}

.form-success {
  display: none;
  padding: var(--space-md);
  border-radius: var(--rounded-sm);
  border: 1px solid #39bf45;
  background: #f4fff4;
  color: #006400;
  font-size: 14px;
  margin-top: var(--space-md);
}

.form-success.is-visible {
  display: block;
}

.site-footer {
  background: var(--color-canvas);
  border-top: 1px solid var(--color-hairline);
  padding: var(--space-section) 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-xl);
}

.footer-label {
  margin: 0 0 var(--space-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  font-size: 14px;
  color: var(--color-body);
}

.footer-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.35;
  color: var(--color-muted);
}

.footer-legal {
  border-top: 1px solid var(--color-hairline);
  margin-top: var(--space-xl);
  padding: var(--space-lg) 0;
}

.legal-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  color: var(--color-muted);
}

.legal-row a {
  color: var(--color-link);
}

.cookie-banner {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
}

.cookie-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-xxl);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
  justify-content: space-between;
}

.cookie-text {
  margin: 0;
  flex: 1;
  min-width: 240px;
  font-size: 14px;
  color: var(--color-body);
}

.cookie-actions {
  display: flex;
  gap: var(--space-sm);
}

.page-article h1 {
  margin: 0 0 var(--space-md);
  font-size: 40px;
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-ink);
}

.page-article .meta-line {
  margin: 0 0 var(--space-xl);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-muted);
}

.prose {
  max-width: 720px;
}

.prose h2 {
  margin: var(--space-xl) 0 var(--space-md);
  font-size: 24px;
  font-weight: 400;
  color: var(--color-ink);
}

.prose h3 {
  margin: var(--space-lg) 0 var(--space-sm);
  font-size: 20px;
  font-weight: 400;
  color: var(--color-ink);
}

.prose p {
  margin: 0 0 var(--space-md);
  font-size: 14px;
  line-height: 1.35;
  color: var(--color-body);
}

.prose ul {
  margin: 0 0 var(--space-md);
  padding-left: 1.2rem;
}

.prose li {
  margin-bottom: var(--space-xs);
  font-size: 14px;
  line-height: 1.35;
  color: var(--color-body);
}

.prose .figure {
  margin: var(--space-xl) 0;
}

.prose .figure img {
  border-radius: var(--rounded-md);
}

.caption {
  margin-top: var(--space-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-muted);
}

.ref-list a {
  word-break: break-word;
}

@media (max-width: 1024px) {
  .article-grid,
  .demo-grid,
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-lg);
  }

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

  .primary-nav {
    width: 100%;
    display: none;
  }

  .primary-nav.is-open {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-md) 0;
  }

  .hero-band h1,
  .page-article h1 {
    font-size: 32px;
  }

  .article-grid,
  .demo-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: var(--space-xxl) 0;
  }

  .hero-band {
    padding: var(--space-xxl) 0;
  }
}