@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Inter+Display:wght@400;475;500&display=swap');

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

: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;
  --spacing-xxs: 4px;
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --spacing-section: 96px;
  --max-width: 1280px;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  background: var(--color-canvas);
  color: var(--color-body);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.25;
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* TOP NAV */
.top-nav {
  height: 64px;
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  position: sticky;
  top: 0;
  z-index: 100;
}
.top-nav .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  list-style: none;
}
.nav-menu a {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-body);
  text-decoration: none;
}
.nav-menu a:hover { color: var(--color-ink); }
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  flex-direction: column;
  gap: 5px;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  transition: transform 0.2s;
}
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-canvas);
  z-index: 200;
  padding: var(--spacing-xxl) var(--spacing-xxl);
}
.mobile-menu.open { display: flex; flex-direction: column; gap: var(--spacing-xl); }
.mobile-menu-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 24px;
  color: var(--color-ink);
  align-self: flex-end;
}
.mobile-menu a {
  font-size: 20px;
  font-weight: 400;
  color: var(--color-ink);
  text-decoration: none;
}

/* BUTTONS */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.4;
  padding: 16px 24px;
  border-radius: var(--rounded-lg);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s;
}
.btn-primary:active { background: var(--color-primary-active); color: var(--color-on-primary); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-canvas);
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 500;
  padding: 16px 24px;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--color-hairline);
  cursor: pointer;
  text-decoration: none;
  transition: border-color 0.15s;
}
.btn-secondary:active { border-color: var(--color-ink); color: var(--color-ink); }

.btn-secondary-on-dark {
  display: inline-flex;
  align-items: center;
  background: var(--color-canvas);
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 500;
  padding: 16px 24px;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--color-hairline);
  cursor: pointer;
  text-decoration: none;
}

.btn-legal {
  background: var(--color-link);
  color: var(--color-on-primary);
  font-size: 13.12px;
  font-weight: 600;
  padding: 12px 10px;
  border-radius: var(--rounded-xs);
  border: none;
  cursor: pointer;
  text-decoration: none;
}

/* HERO BAND */
.hero-band {
  padding: var(--spacing-section) 0;
  background: var(--color-canvas);
}
.hero-band h1 {
  font-family: 'Inter Display', 'Inter', sans-serif;
  font-size: 40px;
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-ink);
  max-width: 680px;
  margin-bottom: var(--spacing-lg);
}
.hero-band p {
  font-size: 14px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-body);
  max-width: 520px;
  margin-bottom: var(--spacing-xl);
}
.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}
.hero-meta {
  margin-top: var(--spacing-xxl);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}
.hero-meta-item {
  background: var(--color-surface-soft);
  border-radius: var(--rounded-md);
  padding: var(--spacing-lg);
}
.hero-meta-item h3 {
  font-size: 20px;
  font-weight: 400;
  color: var(--color-ink);
  margin-bottom: var(--spacing-xs);
}
.hero-meta-item p { font-size: 14px; color: var(--color-muted); }

/* SIGNATURE CARDS */
.signature-coral {
  background: var(--color-signature-coral);
  color: var(--color-on-primary);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-xxl);
  margin: 0 0 var(--spacing-section) 0;
}
.signature-coral h2 {
  font-family: 'Inter Display', 'Inter', sans-serif;
  font-size: 32px;
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}
.signature-coral p {
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: var(--spacing-xl);
  max-width: 560px;
  opacity: 0.9;
}

.signature-forest {
  background: var(--color-signature-forest);
  color: var(--color-on-primary);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-xxl);
}
.signature-forest h2 {
  font-family: 'Inter Display', 'Inter', sans-serif;
  font-size: 32px;
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}
.signature-forest p {
  font-size: 14px;
  line-height: 1.6;
  max-width: 560px;
  opacity: 0.9;
}

/* SECTION BAND */
.section-band {
  padding: var(--spacing-section) 0;
  background: var(--color-canvas);
}
.section-band-soft {
  padding: var(--spacing-section) 0;
  background: var(--color-surface-soft);
}
.section-band-dark {
  padding: var(--spacing-section) 0;
  background: var(--color-surface-dark);
  color: var(--color-on-primary);
}
.section-band-cream {
  padding: var(--spacing-section) 0;
  background: var(--color-signature-cream);
}

.section-title {
  font-family: 'Inter Display', 'Inter', sans-serif;
  font-size: 32px;
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-ink);
  margin-bottom: var(--spacing-xxl);
}
.section-title-on-dark {
  font-family: 'Inter Display', 'Inter', sans-serif;
  font-size: 32px;
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-on-primary);
  margin-bottom: var(--spacing-xl);
}
.section-subtitle {
  font-size: 24px;
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: 0.12px;
  color: var(--color-ink);
  margin-bottom: var(--spacing-xl);
}

/* ARTICLE CARDS GRID */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}
.article-card {
  background: var(--color-canvas);
  border-radius: var(--rounded-md);
  border: 1px solid var(--color-hairline);
  overflow: hidden;
  text-decoration: none;
  display: block;
  transition: border-color 0.15s;
}
.article-card:active { border-color: var(--color-ink); }
.article-card img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}
.article-card-body { padding: var(--spacing-md); }
.article-card-tag {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: var(--spacing-xs);
}
.article-card-title {
  font-size: 18px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-ink);
  margin-bottom: var(--spacing-xs);
}
.article-card-meta {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.35;
  letter-spacing: 0.16px;
}

/* DEMO GRID */
.demo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}
.demo-card {
  border-radius: var(--rounded-md);
  padding: var(--spacing-md);
}
.demo-card img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--rounded-sm);
  margin-bottom: var(--spacing-sm);
}
.demo-card-title {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-ink);
  margin-bottom: var(--spacing-xxs);
}
.demo-card-desc {
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.5;
}
.demo-card-peach { background: var(--color-signature-peach); }
.demo-card-mint { background: var(--color-signature-mint); }
.demo-card-yellow { background: var(--color-signature-yellow); }
.demo-card-peach .demo-card-title,
.demo-card-mint .demo-card-title,
.demo-card-yellow .demo-card-title { color: var(--color-ink); }

/* CREAM CALLOUT */
.cream-callout {
  background: var(--color-signature-cream);
  border-radius: var(--rounded-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}
.cream-callout h3 {
  font-size: 20px;
  font-weight: 400;
  color: var(--color-ink);
  margin-bottom: var(--spacing-xs);
}
.cream-callout p { font-size: 14px; color: var(--color-body); line-height: 1.6; }

/* CTA BAND LIGHT */
.cta-band-light {
  background: var(--color-surface-strong);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-xxl);
  text-align: center;
}
.cta-band-light h2 {
  font-family: 'Inter Display', 'Inter', sans-serif;
  font-size: 32px;
  font-weight: 400;
  color: var(--color-ink);
  margin-bottom: var(--spacing-lg);
}

/* CONTACT FORM */
.contact-form {
  max-width: 560px;
}
.form-group {
  margin-bottom: var(--spacing-md);
}
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: var(--spacing-xs);
}
.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--color-canvas);
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 400;
  border-radius: var(--rounded-sm);
  padding: 12px 16px;
  height: 44px;
  border: 1px solid var(--color-hairline);
  font-family: inherit;
}
.form-group textarea {
  height: auto;
  min-height: 100px;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #458fff;
}

/* FOOTER */
.site-footer {
  background: var(--color-canvas);
  border-top: 1px solid var(--color-hairline);
  padding: var(--spacing-section) 0 var(--spacing-xl);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xxl);
}
.footer-brand-col .footer-brand {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-ink);
  display: block;
  margin-bottom: var(--spacing-sm);
  text-decoration: none;
}
.footer-brand-col p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: var(--spacing-md);
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: var(--spacing-xs); }
.footer-col ul a {
  font-size: 14px;
  color: var(--color-muted);
  text-decoration: none;
}
.footer-col ul a:hover { color: var(--color-ink); }
.footer-legal {
  border-top: 1px solid var(--color-hairline);
  padding-top: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}
.footer-legal p { font-size: 13px; color: var(--color-muted); }
.footer-legal-links { display: flex; gap: var(--spacing-lg); }
.footer-legal-links a { font-size: 13px; color: var(--color-muted); text-decoration: none; }

/* ARTICLE PAGE */
.article-header {
  padding: var(--spacing-section) 0 var(--spacing-xxl);
  background: var(--color-canvas);
}
.article-header h1 {
  font-family: 'Inter Display', 'Inter', sans-serif;
  font-size: 40px;
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-ink);
  max-width: 760px;
  margin-bottom: var(--spacing-lg);
}
.article-header .article-meta {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-muted);
  letter-spacing: 0.16px;
  margin-bottom: var(--spacing-xxl);
}
.article-header img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  border-radius: var(--rounded-md);
}
.article-body {
  max-width: 760px;
  padding: var(--spacing-xxl) 0 var(--spacing-section);
}
.article-body h2 {
  font-family: 'Inter Display', 'Inter', sans-serif;
  font-size: 24px;
  font-weight: 400;
  color: var(--color-ink);
  margin: var(--spacing-xxl) 0 var(--spacing-md);
  letter-spacing: 0.12px;
}
.article-body h3 {
  font-size: 20px;
  font-weight: 400;
  color: var(--color-ink);
  margin: var(--spacing-xl) 0 var(--spacing-sm);
}
.article-body p {
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}
.article-body ul,
.article-body ol {
  padding-left: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}
.article-body li {
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.7;
  margin-bottom: var(--spacing-xs);
}
.article-body a { color: var(--color-link); }
.article-body strong { font-weight: 500; color: var(--color-ink); }

/* RELATED ARTICLES */
.related-articles { padding: var(--spacing-section) 0; }

/* PAGE HEADER (for about, privacy, terms) */
.page-header {
  padding: var(--spacing-section) 0 var(--spacing-xxl);
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
}
.page-header h1 {
  font-family: 'Inter Display', 'Inter', sans-serif;
  font-size: 40px;
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-ink);
  margin-bottom: var(--spacing-md);
}
.page-header p {
  font-size: 14px;
  color: var(--color-muted);
  max-width: 560px;
}
.page-body {
  max-width: 760px;
  padding: var(--spacing-section) 0;
}
.page-body h2 {
  font-size: 24px;
  font-weight: 400;
  color: var(--color-ink);
  margin: var(--spacing-xxl) 0 var(--spacing-md);
}
.page-body h3 {
  font-size: 20px;
  font-weight: 400;
  color: var(--color-ink);
  margin: var(--spacing-xl) 0 var(--spacing-sm);
}
.page-body p {
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}
.page-body ul, .page-body ol {
  padding-left: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}
.page-body li {
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.7;
  margin-bottom: var(--spacing-xs);
}

/* DISCLAIMER */
.disclaimer-band {
  background: var(--color-surface-soft);
  border-top: 1px solid var(--color-hairline);
  padding: var(--spacing-lg) 0;
}
.disclaimer-band p {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.5;
}

/* COOKIE BANNER */
#cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-surface-dark);
  color: var(--color-on-primary);
  padding: var(--spacing-lg) var(--spacing-xxl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
  z-index: 300;
  flex-wrap: wrap;
}
#cookie-banner p {
  font-size: 13px;
  line-height: 1.5;
  flex: 1;
  min-width: 200px;
}
#cookie-banner a { color: #7eb3ff; }
.cookie-actions { display: flex; gap: var(--spacing-sm); flex-shrink: 0; }

/* BREADCRUMB */
.breadcrumb {
  padding: var(--spacing-lg) 0 0;
  font-size: 13px;
  color: var(--color-muted);
}
.breadcrumb a { color: var(--color-muted); text-decoration: none; }
.breadcrumb span { margin: 0 var(--spacing-xs); }

/* SCHEMA HIDDEN */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

/* TWO-COL LAYOUT */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
}
.two-col-reverse { direction: rtl; }
.two-col-reverse > * { direction: ltr; }

/* RESPONSIVE */
@media (max-width: 1024px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .demo-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-meta { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  :root { --spacing-section: 64px; }
  .container { padding: 0 var(--spacing-md); }
  .nav-menu { display: none; }
  .nav-hamburger { display: flex; }
  .hero-band h1 { font-size: 28px; }
  .article-header h1 { font-size: 28px; }
  .section-title { font-size: 24px; }
  .cards-grid { grid-template-columns: 1fr; }
  .demo-grid { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-legal { flex-direction: column; align-items: flex-start; }
  #cookie-banner { flex-direction: column; align-items: flex-start; }
  .hero-actions { flex-direction: column; }
  .signature-coral h2,
  .signature-forest h2 { font-size: 24px; }
}