/* ==========================================================================
   Antarctica Solo Cruise Guide - Design System
   ========================================================================== */

:root {
  --color-bg:         #F5F7F2;
  --color-surface:    #FFFFFF;
  --color-surface-2:  #EDF2EC;
  --color-border:     #D0DAD0;
  --color-text:       #1A2420;
  --color-muted:      #5A7065;
  --color-accent:     #1B6B4A;
  --color-accent-bg:  #E8F5EE;
  --color-warm:       #C47A2E;
  --color-warm-bg:    #FDF4E7;
  --color-brand:      #1B5E8F;
  --color-brand-bg:   #EBF4FC;
  --color-ok:         #1A5C38;
  --color-ok-bg:      #EDFAF3;
  --color-warning:    #7B5C00;
  --color-warning-bg: #FFF8E6;
  --radius:           8px;
  --font-display:     'Playfair Display', Georgia, serif;
  --font-body:        'Inter', sans-serif;
  --font-size-base:   16px;
  --line-height:      1.72;
  --max-width:        1120px;
}

/* --------------------------------------------------------------------
   Reset
   -------------------------------------------------------------------- */

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }

a { color: var(--color-accent); text-decoration-thickness: 1px; }
a:hover { text-decoration: none; }

ul, ol { padding-left: 1.4rem; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------- */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.24;
  color: var(--color-text);
  margin: 0 0 0.6em;
}

h1 { font-size: 2.5rem; font-weight: 700; }
h2 { font-size: 1.85rem; margin-top: 2.6em; font-weight: 600; }
h3 { font-size: 1.4rem; margin-top: 2em; font-weight: 600; }
h4 { font-size: 1.15rem; margin-top: 1.6em; font-weight: 600; }

p { margin: 0 0 1.2em; }

.section-lead {
  font-size: 1.1rem;
  color: var(--color-muted);
}

.eyebrow {
  display: block;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-warm);
  margin-bottom: 0.5em;
}

/* --------------------------------------------------------------------
   Header
   -------------------------------------------------------------------- */

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
  gap: 24px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
  text-decoration: none;
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.site-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}

.site-nav a:hover { color: var(--color-accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: var(--color-text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.independence-bar {
  background: var(--color-accent);
  color: #fff;
}

.independence-bar .container {
  padding-top: 8px;
  padding-bottom: 8px;
  font-size: 0.82rem;
  text-align: center;
  letter-spacing: 0.01em;
}

/* --------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------- */

.hero {
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
  padding: 48px 0 40px;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: center;
}

.hero h1 { margin-bottom: 0.4em; }

.hero-image { width: 100%; height: 320px; object-fit: cover; border-radius: var(--radius); }

.photo-credit {
  font-size: 0.72rem;
  color: var(--color-muted);
  margin-top: 6px;
  text-align: right;
}

.page-hero {
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
  padding: 44px 0;
}

/* --------------------------------------------------------------------
   Key Takeaways
   -------------------------------------------------------------------- */

.key-takeaways {
  margin: 2em 0;
}

.takeaways-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.takeaway-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 18px 18px 16px;
}

.takeaway-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.takeaway-item p {
  font-size: 0.92rem;
  margin: 0;
  color: var(--color-text);
}

/* --------------------------------------------------------------------
   Anchor nav
   -------------------------------------------------------------------- */

.anchor-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px;
  margin: 1.6em 0 2.4em;
  position: sticky;
  top: 66px;
  z-index: 40;
}

.anchor-nav a {
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--color-muted);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 20px;
  background: var(--color-surface-2);
  white-space: nowrap;
}

.anchor-nav a:hover,
.anchor-nav a.is-active {
  background: var(--color-accent);
  color: #fff;
}

/* --------------------------------------------------------------------
   Main content
   -------------------------------------------------------------------- */

main {
  padding: 40px 0 20px;
}

.content-section {
  scroll-margin-top: 120px;
}

/* --------------------------------------------------------------------
   Timeline / meet list
   -------------------------------------------------------------------- */

.timeline-list,
.meet-list {
  list-style: none;
  padding-left: 0;
  counter-reset: item;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 1.6em 0;
}

.timeline-list li,
.meet-list li {
  counter-increment: item;
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 18px 16px 56px;
}

.timeline-list li::before,
.meet-list li::before {
  content: counter(item);
  position: absolute;
  left: 16px;
  top: 16px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.timeline-list li strong,
.meet-list li strong { color: var(--color-accent); }

/* --------------------------------------------------------------------
   Testimonials
   -------------------------------------------------------------------- */

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin: 1.6em 0;
}

.testimonial-card {
  background: var(--color-warm-bg);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-warm);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.testimonial-card blockquote {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--color-text);
}

.testimonial-card cite {
  font-style: normal;
  font-size: 0.85rem;
  color: var(--color-muted);
  font-weight: 500;
}

/* --------------------------------------------------------------------
   Comparison tables
   -------------------------------------------------------------------- */

.table-wrap {
  overflow-x: auto;
  margin: 1.6em 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

table.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  font-size: 0.92rem;
  min-width: 560px;
}

.comparison-table caption {
  text-align: left;
  font-weight: 600;
  padding: 12px 16px;
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
}

.comparison-table th,
.comparison-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.comparison-table thead th {
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  position: relative;
  white-space: nowrap;
}

.comparison-table thead th[data-sortable]::after {
  content: '\2195';
  margin-left: 6px;
  opacity: 0.7;
  font-size: 0.8em;
}

.comparison-table tbody tr:nth-child(even) { background: var(--color-surface-2); }
.comparison-table tbody tr:hover { background: var(--color-accent-bg); }

/* --------------------------------------------------------------------
   Brand spotlight (Poseidon block)
   -------------------------------------------------------------------- */

.brand-spotlight {
  background: var(--color-brand-bg);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-brand);
  border-radius: var(--radius);
  padding: 32px;
  margin: 2em 0;
}

.brand-spotlight__badge {
  display: inline-block;
  background: var(--color-brand);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.brand-spotlight__header h3 {
  margin-top: 0;
  margin-bottom: 0.3em;
  color: var(--color-brand);
}

.brand-spotlight__sub {
  color: var(--color-muted);
  font-size: 0.98rem;
  margin-bottom: 1.6em;
}

.brand-spotlight__triplet {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.triplet-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 18px 16px;
}

.triplet-item strong {
  display: block;
  color: var(--color-brand);
  font-size: 1rem;
  margin-bottom: 8px;
}

.triplet-item p {
  font-size: 0.9rem;
  margin: 0;
}

.brand-spotlight__meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

.brand-spotlight__meta-row span {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 0.8rem;
  color: var(--color-muted);
  font-weight: 500;
}

.brand-spotlight__cta {
  display: inline-block;
  background: var(--color-brand);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 24px;
  border-radius: var(--radius);
}

.brand-spotlight__cta:hover { background: #164b74; }

/* --------------------------------------------------------------------
   Verify note
   -------------------------------------------------------------------- */

.verify-note {
  font-size: 0.82rem;
  color: var(--color-warning);
  background: var(--color-warning-bg);
  border: 1px solid #EBD98C;
  border-radius: var(--radius);
  padding: 8px 12px;
  margin: 1em 0;
}

/* --------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------- */

.faq-list { margin: 1.6em 0; }

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 10px;
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  padding: 16px 20px;
  font-weight: 600;
  font-family: var(--font-display);
  font-size: 1.05rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after { transform: rotate(45deg); }

.faq-item .faq-answer {
  padding: 0 20px 18px;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------
   Callouts
   -------------------------------------------------------------------- */

.callout {
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 1.6em 0;
  border: 1px solid var(--color-border);
}

.callout--pick {
  background: var(--color-ok-bg);
  border-left: 4px solid var(--color-ok);
}

.callout--warm {
  background: var(--color-warm-bg);
  border-left: 4px solid var(--color-warm);
}

/* --------------------------------------------------------------------
   Image gallery placeholders
   -------------------------------------------------------------------- */

.image-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 1.6em 0;
}

.image-gallery figure {
  margin: 0;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.image-gallery img {
  width: 100%;
  height: 190px;
  object-fit: cover;
  display: block;
}

.image-gallery figcaption {
  padding: 10px 14px;
  font-size: 0.82rem;
  color: var(--color-muted);
}

.image-gallery .photo-credit {
  padding: 0 14px 10px;
  margin-top: -4px;
}

/* --------------------------------------------------------------------
   Self-assessment / checklist boxes
   -------------------------------------------------------------------- */

.self-check {
  background: var(--color-surface-2);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 1.6em 0;
}

.self-check p { margin-bottom: 0.6em; }

/* --------------------------------------------------------------------
   Methodology criteria table / cards
   -------------------------------------------------------------------- */

.criteria-grid {
  display: grid;
  gap: 12px;
  margin: 1.6em 0;
}

.criteria-row {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 20px;
}

.criteria-row strong { color: var(--color-accent); }

.source-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 10px;
}

.source-list li {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 16px;
}

/* --------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------- */

.site-footer {
  background: var(--color-text);
  color: #C9D6CE;
  padding: 44px 0 24px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid #34433C;
}

.site-footer strong {
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.site-footer p { font-size: 0.9rem; margin-top: 10px; }

.site-footer nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer nav a {
  color: #C9D6CE;
  text-decoration: none;
  font-size: 0.92rem;
}

.site-footer nav a:hover { color: #fff; }

.footer-legal {
  font-size: 0.78rem;
  color: #8CA091;
  margin-top: 18px;
  margin-bottom: 0;
}

.back-link {
  display: inline-block;
  margin-bottom: 1.4em;
  font-weight: 500;
  font-size: 0.92rem;
}

/* --------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------- */

@media (max-width: 900px) {
  .hero .container { grid-template-columns: 1fr; }
  .takeaways-grid { grid-template-columns: repeat(2, 1fr); }
  .brand-spotlight__triplet { grid-template-columns: 1fr; }
  .image-gallery { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .criteria-row { grid-template-columns: 1fr; }
  .anchor-nav { position: static; }
}

@media (max-width: 640px) {
  h1 { font-size: 1.9rem; }
  h2 { font-size: 1.5rem; }
  .takeaways-grid { grid-template-columns: 1fr; }
  .nav-toggle { display: flex; }
  .site-header .container { flex-wrap: wrap; }
  .site-nav {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    gap: 14px;
    padding-top: 14px;
    margin-top: 14px;
    border-top: 1px solid var(--color-border);
  }
  .site-nav.is-open { display: flex; }
}