/* ============================================================
   Best Expedition Cruises — global.css
   Design tokens ported from DESIGN.md front-matter (Expedition Elite).
   ============================================================ */

:root {
  /* Colors */
  --surface: #faf9fb;
  --surface-dim: #dbdadb;
  --surface-bright: #faf9fb;
  --surface-container-lowest: #ffffff;
  --surface-container-low: #f4f3f5;
  --surface-container: #efedef;
  --surface-container-high: #e9e8e9;
  --surface-container-highest: #e3e2e4;
  --on-surface: #1a1c1d;
  --on-surface-variant: #43474c;
  --inverse-surface: #2f3032;
  --inverse-on-surface: #f2f0f2;
  --outline: #73777d;
  --outline-variant: #c3c7cd;
  --surface-tint: #486176;
  --primary: #001524;
  --on-primary: #ffffff;
  --primary-container: #0f2a3d;
  --on-primary-container: #7992a9;
  --inverse-primary: #b0c9e2;
  --secondary: #5c5f61;
  --on-secondary: #ffffff;
  --secondary-container: #e0e3e5;
  --on-secondary-container: #626567;
  --tertiary: #001620;
  --on-tertiary: #ffffff;
  --tertiary-container: #002c3c;
  --on-tertiary-container: #6396b0;
  --error: #ba1a1a;
  --on-error: #ffffff;
  --error-container: #ffdad6;
  --on-error-container: #93000a;
  --primary-fixed: #cce6ff;
  --primary-fixed-dim: #b0c9e2;
  --on-primary-fixed: #011e30;
  --on-primary-fixed-variant: #30495e;
  --secondary-fixed: #e0e3e5;
  --secondary-fixed-dim: #c4c7c9;
  --on-secondary-fixed: #191c1e;
  --on-secondary-fixed-variant: #444749;
  --tertiary-fixed: #c0e8ff;
  --tertiary-fixed-dim: #9acee9;
  --on-tertiary-fixed: #001e2b;
  --on-tertiary-fixed-variant: #0f4c64;
  --background: #faf9fb;
  --on-background: #1a1c1d;
  --surface-variant: #e3e2e4;

  /* Typography */
  --font-serif: "Playfair Display", Georgia, "Times New Roman", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --display-lg-size: 64px;
  --display-lg-weight: 700;
  --display-lg-line: 1.1;
  --display-lg-tracking: -0.02em;

  --display-lg-mobile-size: 40px;
  --display-lg-mobile-weight: 700;
  --display-lg-mobile-line: 1.2;
  --display-lg-mobile-tracking: -0.01em;

  --headline-lg-size: 32px;
  --headline-lg-weight: 600;
  --headline-lg-line: 1.3;

  --headline-md-size: 24px;
  --headline-md-weight: 600;
  --headline-md-line: 1.4;

  --body-lg-size: 18px;
  --body-lg-weight: 400;
  --body-lg-line: 1.8;

  --body-md-size: 16px;
  --body-md-weight: 400;
  --body-md-line: 1.6;

  --label-caps-size: 12px;
  --label-caps-weight: 600;
  --label-caps-line: 1.0;
  --label-caps-tracking: 0.1em;

  /* Radius */
  --radius-sm: 0.125rem;
  --radius: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;

  /* Spacing */
  --max-width: 1160px;
  --gutter: 32px;
  --margin-desktop: 64px;
  --margin-mobile: 20px;
  --stack-sm: 10px;
  --stack-md: 29px;
  --stack-lg: 24px;
  --section-gap: 60px;
  --section-gap-mobile: 32px;

  /* Shadows (tinted, low-opacity, diffused) */
  --shadow-tinted: 0 20px 40px -10px rgba(15, 42, 61, 0.1);
  --shadow-tinted-lg: 0 30px 60px -12px rgba(15, 42, 61, 0.16);

  /* Accent (DESIGN.md "Glacier Teal") */
  --glacier-teal: #6497b1;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--surface);
  color: var(--on-surface);
  font-family: var(--font-sans);
  font-size: var(--body-md-size);
  font-weight: var(--body-md-weight);
  line-height: var(--body-md-line);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }
strong { color: var(--primary); font-weight: 600; }
table { border-collapse: collapse; width: 100%; }
button { font: inherit; cursor: pointer; }

/* ---------- Layout ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--margin-mobile);
}
@media (min-width: 768px) {
  .container { padding: 0 var(--margin-desktop); }
}

/* Every H2-level block on the page (Hero, Intro, What Makes, Comparison,
   Ranked Reviews, Best by Region, Price Comparison, How to Choose, What's
   Included, Is It Worth It, FAQ, Conclusion) uses this same section-gap
   spacing uniformly — .section and .section--tight are equivalent now. */
.section, .section--tight {
  padding: var(--section-gap-mobile) 0;
}
@media (min-width: 768px) {
  .section, .section--tight { padding: var(--section-gap) 0; }
}

/* full-width table/banner wrapper used inside constrained sections, per CLAUDE.md §3 */
.table-wrap {
  position: relative;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
/* ---------- Typography ---------- */
.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--label-caps-size);
  font-weight: var(--label-caps-weight);
  line-height: var(--label-caps-line);
  letter-spacing: var(--label-caps-tracking);
  text-transform: uppercase;
  color: var(--on-tertiary-container);
}
.display {
  font-family: var(--font-serif);
  font-size: var(--display-lg-mobile-size);
  font-weight: var(--display-lg-mobile-weight);
  line-height: var(--display-lg-mobile-line);
  letter-spacing: var(--display-lg-mobile-tracking);
  color: var(--surface-bright);
}
@media (min-width: 768px) {
  .display {
    font-size: var(--display-lg-size);
    line-height: var(--display-lg-line);
    letter-spacing: var(--display-lg-tracking);
  }
}
.headline-lg {
  font-family: var(--font-serif);
  font-size: var(--headline-lg-size);
  font-weight: var(--headline-lg-weight);
  line-height: var(--headline-lg-line);
  color: var(--primary);
}
.headline-md {
  font-family: var(--font-serif);
  font-size: var(--headline-md-size);
  font-weight: var(--headline-md-weight);
  line-height: var(--headline-md-line);
  color: var(--primary);
}
.body-lg {
  font-size: var(--body-lg-size);
  line-height: var(--body-lg-line);
  color: var(--on-surface-variant);
}
.text-shadow { text-shadow: 0 1px 3px rgba(0, 0, 0, 0.9), 0 2px 14px rgba(0, 0, 0, 0.8), 0 0 30px rgba(0, 0, 0, 0.6); }

/* ---------- Texture / shadow helpers ---------- */
.texture-overlay {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.05'/%3E%3C/svg%3E");
  pointer-events: none;
  mix-blend-mode: overlay;
}
.tinted-shadow { box-shadow: var(--shadow-tinted); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.65em 1.5em;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: var(--label-caps-size);
  font-weight: var(--label-caps-weight);
  letter-spacing: var(--label-caps-tracking);
  text-transform: uppercase;
  transition: transform 160ms cubic-bezier(0.34, 1.56, 0.64, 1), background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}
.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
  border: none;
}
.btn-primary:hover { background: var(--tertiary-container); }
.btn-primary:focus-visible { outline: 2px solid var(--tertiary-fixed-dim); outline-offset: 2px; }
.btn-primary:active { transform: scale(0.97); }

.link-arrow {
  font-family: var(--font-sans);
  font-size: var(--label-caps-size);
  font-weight: var(--label-caps-weight);
  letter-spacing: var(--label-caps-tracking);
  text-transform: uppercase;
  color: var(--primary);
  border-bottom: 1px solid transparent;
  transition: border-color 160ms ease, color 160ms ease;
}
.link-arrow:hover, .link-arrow:focus-visible { border-color: currentColor; color: var(--on-tertiary-container); }

/* Inline links inside body copy — needs its own style, distinct from CTA-style .link-arrow,
   so a link doesn't disappear into normal-case paragraph text (revision 05 feedback). */
.link-inline {
  color: var(--primary);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--glacier-teal);
  text-underline-offset: 3px;
  transition: color 160ms ease, text-decoration-color 160ms ease;
}
.link-inline:hover, .link-inline:focus-visible { color: var(--on-tertiary-container); }

.external-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.external-link::after {
  content: '\2197';
  font-size: 0.85em;
}

/* ---------- Header ---------- */
.site-header {
  background: rgba(250, 249, 251, 0.85);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(195, 199, 205, 0.3);
}
.site-header .container {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-logo {
  font-family: var(--font-serif);
  font-size: var(--headline-md-size);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--primary);
  white-space: nowrap;
}
.site-nav {
  display: none;
  align-items: center;
  gap: var(--stack-md);
}
@media (min-width: 768px) {
  .site-nav { display: flex; }
}
.site-nav a {
  font-family: var(--font-sans);
  font-size: var(--label-caps-size);
  font-weight: var(--label-caps-weight);
  letter-spacing: var(--label-caps-tracking);
  text-transform: uppercase;
  color: var(--on-surface-variant);
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}
.site-nav a:hover, .site-nav a:focus-visible { color: var(--primary); }
.site-nav a.active { color: var(--primary); border-color: var(--primary); }

.nav-toggle {
  background: none;
  border: none;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}
@media (min-width: 768px) {
  .nav-toggle { display: none; }
}
.nav-toggle .icon-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  position: relative;
}
.nav-toggle .icon-bar::before,
.nav-toggle .icon-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: currentColor;
  transition: transform 160ms ease;
}
.nav-toggle .icon-bar::before { top: -7px; }
.nav-toggle .icon-bar::after { top: 7px; }

.site-nav.is-open {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--stack-sm);
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--surface-container-lowest);
  border-bottom: 1px solid var(--outline-variant);
  padding: var(--stack-md) var(--margin-mobile);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--primary);
  padding-top: var(--section-gap-mobile);
  padding-bottom: var(--stack-lg);
}
@media (min-width: 768px) {
  .site-footer { padding-top: var(--section-gap); }
}
.footer-columns {
  display: grid;
  gap: var(--stack-lg);
  border-bottom: 1px solid rgba(204, 230, 255, 0.2);
  padding-bottom: var(--stack-lg);
  margin-bottom: var(--stack-lg);
}
@media (min-width: 768px) {
  .footer-columns { grid-template-columns: 1.4fr 1fr 1fr; }
}
.footer-col { display: flex; flex-direction: column; gap: var(--stack-sm); }
.footer-col__title {
  font-family: var(--font-sans);
  font-size: var(--label-caps-size);
  font-weight: var(--label-caps-weight);
  letter-spacing: var(--label-caps-tracking);
  text-transform: uppercase;
  color: var(--tertiary-fixed-dim);
  margin-bottom: 4px;
}
.footer-logo {
  font-family: var(--font-serif);
  font-size: var(--headline-md-size);
  font-weight: 600;
  color: var(--surface-bright);
}
.footer-tagline { color: var(--primary-fixed-dim); font-size: 14px; max-width: 32ch; }
.footer-nav {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  gap: var(--stack-sm);
}
.footer-nav a {
  font-family: var(--font-sans);
  font-size: var(--label-caps-size);
  font-weight: var(--label-caps-weight);
  letter-spacing: var(--label-caps-tracking);
  text-transform: uppercase;
  color: var(--primary-fixed-dim);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 160ms ease;
}
.footer-nav a:hover, .footer-nav a:focus-visible { color: var(--tertiary-fixed-dim); }
.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: var(--stack-sm);
  font-size: 14px;
  color: var(--on-primary-fixed-variant);
}
@media (min-width: 768px) {
  .footer-bottom { flex-direction: row; justify-content: space-between; align-items: center; }
}
.footer-trust {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--primary-fixed-dim);
}

/* ---------- Cards ---------- */
.card {
  background: var(--surface-container-lowest);
  border: 1px solid var(--surface-variant);
  border-radius: var(--radius);
  box-shadow: var(--shadow-tinted);
}

/* ---------- Divider lists ---------- */
.divider-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding-bottom: var(--stack-sm);
  border-bottom: 1px solid rgba(0, 21, 36, 0.1);
  font-size: var(--body-md-size);
  line-height: var(--body-md-line);
}
.divider-list li:last-child { border-bottom: none; }
.divider-list .dot {
  color: var(--on-tertiary-container);
  margin-top: 2px;
}

/* ---------- Badges ---------- */
.badge {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(100, 151, 177, 0.1);
  color: var(--primary-container);
  font-family: var(--font-sans);
  font-size: var(--label-caps-size);
  font-weight: var(--label-caps-weight);
  letter-spacing: var(--label-caps-tracking);
  text-transform: uppercase;
  border-radius: var(--radius-full);
}

/* ---------- FAQ accordion ---------- */
.faq-item {
  border-bottom: 1px solid var(--surface-variant);
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: var(--stack-md) 0;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--stack-md);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-sans);
  font-size: 20px;
  color: var(--on-tertiary-container);
  flex-shrink: 0;
  transition: transform 160ms ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p {
  padding-bottom: var(--stack-md);
  color: var(--on-surface-variant);
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--on-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  line-height: 1;
  box-shadow: var(--shadow-tinted-lg);
  z-index: 60;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 200ms ease, transform 200ms ease, background-color 160ms ease;
}
@media (min-width: 768px) {
  .back-to-top { right: 32px; bottom: 32px; }
}
.back-to-top:hover, .back-to-top:focus-visible { background: var(--tertiary-container); }
.back-to-top:focus-visible { outline: 2px solid var(--tertiary-fixed-dim); outline-offset: 2px; }
.back-to-top.is-hidden {
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
}

/* ---------- Utility ---------- */
.text-center { text-align: center; }
@media (min-width: 768px) {
  .md\:text-left { text-align: left; }
}
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}