/*
  HepatoBurn — Site Design System
  Centralized styles for all pages. Semantic, dependency-free CSS
  (no Bootstrap/Mobirise). Mobile-first, accessible, performance-minded.
*/

/* ============ 1. DESIGN TOKENS ============ */
:root {
  /* Color: deep forest green (trust, botanical) + warm amber (CTA, energy) on warm ivory */
  --color-bg: #FAF7EF;
  --color-bg-alt: #F1EBDA;
  --color-surface: #FFFFFF;
  --color-border: #E3DCC7;
  --color-border-strong: #CFC6A9;

  --color-text: #1C2420;
  --color-text-muted: #4E5C53;
  --color-text-soft: #6B7A70;

  --color-primary: #1F4D3D;
  --color-primary-dark: #143529;
  --color-primary-light: #2E6B54;
  --color-primary-tint: #E7EFE9;

  --color-accent: #C08A34;
  --color-accent-dark: #9C6E27;
  --color-accent-tint: #FBF1DE;

  --color-danger: #A5402F;
  --color-danger-tint: #FAECE8;
  --color-success: #2E6B54;

  --color-focus: #1470D6;

  --font-display: "Roboto Slab", Georgia, "Times New Roman", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 3px rgba(20, 30, 24, 0.08);
  --shadow-md: 0 8px 24px rgba(20, 30, 24, 0.10);
  --shadow-lg: 0 16px 40px rgba(20, 30, 24, 0.14);

  --content-max: 1180px;
  --content-narrow: 800px;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
}

/* ============ 2. RESET & BASE ============ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration-thickness: 1.5px; text-underline-offset: 2px; }
a:hover { color: var(--color-primary-dark); }
h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  color: var(--color-primary-dark);
  line-height: 1.25;
  margin: 0 0 var(--space-2);
  font-weight: 700;
}
h1 { font-size: clamp(2rem, 4.5vw, 3rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.25rem); }
h3 { font-size: clamp(1.3rem, 2.4vw, 1.6rem); }
h4 { font-size: 1.15rem; }
p { margin: 0 0 var(--space-2); color: var(--color-text); }
ul, ol { padding-left: 1.3rem; }
li { margin-bottom: 0.5rem; }
strong { color: var(--color-primary-dark); }
hr { border: none; border-top: 1px solid var(--color-border); margin: var(--space-4) 0; }

/* Focus visibility for keyboard users */
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 4px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-primary-dark);
  color: #fff;
  padding: 0.75rem 1.25rem;
  z-index: 200;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus {
  left: 0;
}

/* ============ 3. LAYOUT ============ */
.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}
.container-narrow {
  max-width: var(--content-narrow);
  margin: 0 auto;
  padding: 0 1.25rem;
}
.section {
  padding: var(--space-5) 0;
}
.section-alt {
  background: var(--color-bg-alt);
}
.section-surface {
  background: var(--color-surface);
}
.section-head {
  max-width: 720px;
  margin: 0 auto var(--space-4);
  text-align: center;
}
.section-head.align-left { text-align: left; margin-left: 0; }
.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  background: var(--color-accent-tint);
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  margin-bottom: var(--space-2);
}
.lede {
  font-size: 1.15rem;
  color: var(--color-text-muted);
}

.grid { display: grid; gap: var(--space-3); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.two-col {
  display: grid;
  gap: var(--space-4);
  align-items: center;
}
@media (min-width: 860px) {
  .two-col { grid-template-columns: 1fr 1fr; }
  .two-col.reverse > *:first-child { order: 2; }
}

/* ============ 4. HEADER / NAV ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 247, 239, 0.96);
  backdrop-filter: saturate(160%) blur(6px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.2s ease;
}
.site-header.is-scrolled { box-shadow: var(--shadow-sm); }

.nav-bar {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-primary-dark);
  text-decoration: none;
  white-space: nowrap;
}
.brand img { height: 2.4rem; width: auto; }
.brand:hover { color: var(--color-primary); }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  width: 44px;
  height: 44px;
  cursor: pointer;
}
.nav-toggle span {
  position: relative;
  width: 20px; height: 2px;
  background: var(--color-primary-dark);
  display: block;
}
.nav-toggle span::before, .nav-toggle span::after {
  content: "";
  position: absolute; left: 0;
  width: 20px; height: 2px;
  background: var(--color-primary-dark);
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

.nav-menu {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
  gap: var(--space-3);
}
.nav-menu a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.98rem;
}
.nav-menu a:hover, .nav-menu a[aria-current="page"] { color: var(--color-primary); }

.nav-cta { display: none; }

.nav-panel {
  display: none;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem 1.25rem 1.5rem;
  border-top: 1px solid var(--color-border);
}
.nav-panel.is-open { display: flex; }
.nav-panel a { color: var(--color-text); text-decoration: none; font-weight: 600; }
.nav-panel .btn { width: 100%; text-align: center; }

@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .nav-panel { display: none !important; }
  .nav-menu { display: flex; }
  .nav-cta { display: inline-flex; }
}

/* ============ 5. BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
  line-height: 1.2;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--color-accent);
  color: #2A1B04;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-accent-dark); color: #fff; }
.btn-outline {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}
.btn-outline:hover { background: var(--color-primary-tint); }
.btn-ghost {
  background: transparent;
  color: var(--color-primary-dark);
  text-decoration: underline;
  padding: 0.5rem 0.25rem;
}
.btn-lg { padding: 1.05rem 2.1rem; font-size: 1.08rem; }
.btn-block { width: 100%; }

/* ============ 6. HERO ============ */
.hero {
  padding: var(--space-5) 0 var(--space-4);
}
.hero-grid {
  display: grid;
  gap: var(--space-4);
  align-items: center;
}
@media (min-width: 900px) {
  .hero-grid { grid-template-columns: 1.05fr 0.95fr; }
}
.hero-media img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.hero-checks {
  list-style: none;
  padding: 0;
  margin: var(--space-2) 0 var(--space-3);
  display: grid;
  gap: 0.55rem;
}
.hero-checks li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  color: var(--color-text);
  font-weight: 600;
  margin: 0;
}
.hero-checks li::before {
  content: "✓";
  color: var(--color-primary);
  font-weight: 900;
  flex: none;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: var(--space-3);
}
.hero-note {
  margin-top: var(--space-2);
  font-size: 0.9rem;
  color: var(--color-text-soft);
}

/* ============ 7. TRUST STRIP / BADGES ============ */
.trust-strip {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}
.trust-strip .grid {
  padding: var(--space-3) 0;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  font-size: 0.95rem;
  justify-content: center;
  text-align: center;
}

/* ============ 8. CARDS ============ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  box-shadow: var(--shadow-sm);
}
.card h3, .card h4 { margin-top: 0; }
.card-icon {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--color-primary-tint);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 0.9rem;
}

.step-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-3);
}
.step-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  margin: 0;
}
.step-num {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  font-family: var(--font-display);
  flex: none;
}

/* ============ 9. PROS / CONS ============ */
.pros-cons {
  display: grid;
  gap: var(--space-3);
}
@media (min-width: 760px) {
  .pros-cons { grid-template-columns: 1fr 1fr; }
}
.pros-cons .card ul { list-style: none; padding: 0; margin: 0; }
.pros-cons .card li {
  display: flex; gap: 0.6rem; align-items: flex-start;
  margin-bottom: 0.7rem;
}
.pros .card-icon { color: var(--color-primary); }
.cons .card-icon { color: var(--color-danger); background: var(--color-danger-tint); }

/* ============ 10. FAQ (native details/summary) ============ */
.faq-list { display: grid; gap: 0.85rem; }
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 1.1rem 1.3rem;
  font-weight: 700;
  font-family: var(--font-display);
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--color-accent-dark);
  flex: none;
  transition: transform 0.15s ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-answer {
  padding: 0 1.3rem 1.2rem;
  color: var(--color-text-muted);
}

/* ============ 11. TABLES ============ */
.table-wrap { overflow-x: auto; margin: var(--space-3) 0; border-radius: var(--radius-md); border: 1px solid var(--color-border); }
table { width: 100%; border-collapse: collapse; min-width: 480px; background: var(--color-surface); }
th, td { text-align: left; padding: 0.85rem 1rem; border-bottom: 1px solid var(--color-border); font-size: 0.95rem; }
thead th { background: var(--color-primary-tint); color: var(--color-primary-dark); font-family: var(--font-display); }
tbody tr:last-child td { border-bottom: none; }

/* ============ 12. CALLOUTS ============ */
.callout {
  border-radius: var(--radius-md);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}
.callout-accent { background: var(--color-accent-tint); border-color: #E9D3A5; }
.callout-primary { background: var(--color-primary-tint); border-color: #C9DBCE; }
.callout-caution { background: var(--color-danger-tint); border-color: #EBC7BF; }
.callout h4 { margin-top: 0; }
.callout p:last-child { margin-bottom: 0; }

.disclosure-box {
  font-size: 0.92rem;
  color: var(--color-text-soft);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}
.disclosure-box p:last-child { margin-bottom: 0; }

/* ============ 13. BREADCRUMBS ============ */
.breadcrumbs {
  font-size: 0.85rem;
  color: var(--color-text-soft);
  padding: 0.9rem 0;
}
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 0.4rem; padding: 0; margin: 0; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 0.4rem; color: var(--color-border-strong); }
.breadcrumbs a { color: var(--color-text-soft); text-decoration: none; }
.breadcrumbs a:hover { color: var(--color-primary); text-decoration: underline; }
.breadcrumbs [aria-current="page"] { color: var(--color-text); font-weight: 600; }

/* ============ 14. CTA BANNER ============ */
.cta-banner {
  background: var(--color-primary);
  color: #F3F1E6;
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
}
.cta-banner h2, .cta-banner h3 { color: #fff; }
.cta-banner p { color: #DDE7DF; }
.cta-banner .btn-primary { box-shadow: none; }

/* ============ 15. RELATED PAGES ============ */
.related-links {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.related-links a {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  height: 100%;
}
.related-links a:hover { border-color: var(--color-primary); box-shadow: var(--shadow-sm); }
.related-links .rl-label {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent-dark);
  font-weight: 700;
  margin-bottom: 0.4rem;
}
.related-links strong { display: block; color: var(--color-primary-dark); margin-bottom: 0.3rem; }
.related-links span.desc { color: var(--color-text-soft); font-size: 0.92rem; }

/* ============ 16. FOOTER ============ */
.site-footer {
  background: var(--color-primary-dark);
  color: #D9E3DC;
  padding: var(--space-5) 0 var(--space-3);
  margin-top: var(--space-6);
}
.footer-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1.3fr 1fr 1fr;
}
@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.site-footer h5 {
  color: #fff;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
}
.site-footer a { color: #C9D6CD; text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.6rem; }
.footer-brand { color: #fff; font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; }
.footer-disclosure {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid rgba(255,255,255,0.14);
  font-size: 0.85rem;
  color: #A9BBB0;
}
.footer-bottom {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid rgba(255,255,255,0.14);
  font-size: 0.85rem;
  color: #A9BBB0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
}

/* ============ 17. SCROLL TOP ============ */
.scroll-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  border: none;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  z-index: 90;
  font-size: 1.1rem;
}
.scroll-top.is-visible { display: flex; }

/* ============ 18. UTILITIES ============ */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.small { font-size: 0.88rem; color: var(--color-text-soft); }
.stack { display: grid; gap: var(--space-3); }
.stack-sm { display: grid; gap: var(--space-1); }

/* ============ 19. LEGAL PAGES ============ */
.legal-content h2 { margin-top: var(--space-4); }
.legal-content h2:first-child { margin-top: 0; }
.legal-content ul { margin-bottom: var(--space-2); }
.updated-note {
  font-size: 0.9rem;
  color: var(--color-text-soft);
  margin-bottom: var(--space-4);
}

/* ============ 20. 404 PAGE ============ */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-6) 0;
}
.error-code {
  font-family: var(--font-display);
  font-size: 5rem;
  color: var(--color-primary-tint);
  -webkit-text-stroke: 2px var(--color-primary);
  margin: 0;
}