/* ==========================================================================
   Antarctica Seniors Guide - stylesheet
   ========================================================================== */

:root {
  --color-bg:          #FAFAF8;
  --color-surface:     #FFFFFF;
  --color-surface-2:   #F4F1EC;
  --color-border:      #DDD8D0;
  --color-border-dark: #B9B2A6;
  --color-text:        #1A1917;
  --color-muted:       #6B6560;
  --color-accent:      #1B5E8F;
  --color-accent-bg:   #EBF4FC;
  --color-accent-dark: #12456B;
  --color-warning:     #7B5C00;
  --color-warning-bg:  #FFF8E6;
  --color-ok:          #1A5C38;
  --color-ok-bg:       #EDFAF3;
  --color-brand:       #1B5E8F;
  --color-brand-bg:    #EBF4FC;
  --radius:            8px;
  --radius-lg:         14px;
  --font-sans:         'Source Serif 4', Georgia, serif;
  --font-body:         'Inter', -apple-system, sans-serif;
  --font-size-base:    17px;
  --line-height:       1.75;
  --container-max:     1120px;
  --shadow-card:       0 1px 3px rgba(26, 25, 23, 0.06), 0 1px 2px rgba(26, 25, 23, 0.04);
  --shadow-card-hover: 0 4px 14px rgba(26, 25, 23, 0.08);
}

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

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

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

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

a { color: var(--color-accent); text-decoration: underline; text-decoration-thickness: 1px; }
a:hover { color: var(--color-accent-dark); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  color: var(--color-text);
  line-height: 1.25;
  margin: 0 0 0.6em;
  font-weight: 700;
}

h1 { font-size: clamp(2rem, 4.2vw, 2.75rem); }
h2 { font-size: clamp(1.55rem, 2.8vw, 2.05rem); margin-top: 2.6em; }
h3 { font-size: 1.3rem; margin-top: 2em; }
h4 { font-size: 1.08rem; margin-top: 1.4em; }

p { margin: 0 0 1.2em; }
ul, ol { padding-left: 1.4em; margin: 0 0 1.2em; }
li { margin-bottom: 0.5em; }

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

section { padding: 0; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: #fff;
  padding: 10px 16px;
  z-index: 200;
  border-radius: var(--radius);
}
.skip-link:focus { left: 12px; top: 12px; }

/* --------------------------------------------------------------------------
   Header & independence bar
   -------------------------------------------------------------------------- */

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
}
.site-logo img { display: block; }
.site-logo:hover { color: var(--color-accent); }

.site-nav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.98rem;
  padding: 8px 2px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.site-nav a:hover { color: var(--color-accent); }

.independence-bar {
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.92rem;
  color: var(--color-muted);
  text-align: center;
  padding: 10px 0;
}

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

.hero {
  padding: 56px 0 32px;
  background: linear-gradient(180deg, var(--color-accent-bg) 0%, var(--color-bg) 100%);
}

.hero__breadcrumb {
  font-size: 0.88rem;
  color: var(--color-muted);
  margin-bottom: 18px;
}
.hero__breadcrumb a { color: var(--color-muted); }

.hero h1 { max-width: 46rem; margin-bottom: 0.5em; }

.hero__sub {
  max-width: 42rem;
  font-size: 1.15rem;
  color: var(--color-muted);
  margin-bottom: 1.6em;
}

/* Stat chips */
.stat-chips {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  margin: 28px 0 8px;
}

.stat-chip {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 14px;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.stat-chip__value {
  display: block;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-accent);
  margin-bottom: 4px;
}

.stat-chip__label {
  font-size: 0.86rem;
  color: var(--color-muted);
}

@media (max-width: 860px) {
  .stat-chips { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .stat-chips { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------------
   Key takeaways
   -------------------------------------------------------------------------- */

.key-takeaways {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 5px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 26px 28px 20px;
  margin: 28px 0 40px;
  box-shadow: var(--shadow-card);
}

.key-takeaways__title {
  margin-top: 0;
  font-size: 1.2rem;
  color: var(--color-accent-dark);
}

.key-takeaways ul { margin-bottom: 0; padding-left: 1.2em; }
.key-takeaways li { margin-bottom: 0.65em; }
.key-takeaways li:last-child { margin-bottom: 0; }

/* --------------------------------------------------------------------------
   Anchor navigation
   -------------------------------------------------------------------------- */

.anchor-nav {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 0 0 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  position: relative;
}

.anchor-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-muted);
  padding: 6px 10px;
  border-radius: 6px;
  min-height: 32px;
  display: inline-flex;
  align-items: center;
}

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

@media (min-width: 768px) {
  .anchor-nav {
    position: sticky;
    top: 12px;
    z-index: 20;
  }
}

/* --------------------------------------------------------------------------
   Generic content section spacing
   -------------------------------------------------------------------------- */

.content-section {
  padding: 6px 0;
}

.note {
  font-size: 0.9rem;
  color: var(--color-muted);
  font-style: italic;
}

/* --------------------------------------------------------------------------
   Policy list / self-assessment / checklists
   -------------------------------------------------------------------------- */

.policy-list,
.self-assessment,
.packing-checklist {
  background: var(--color-surface-2);
  border-radius: var(--radius);
  padding: 24px 24px 24px 44px;
}

.policy-list li,
.self-assessment li,
.packing-checklist li {
  margin-bottom: 0.9em;
}

.self-assessment,
.packing-checklist {
  padding-left: 1.6em;
}

/* --------------------------------------------------------------------------
   Two-column comparisons (pros/cons, included/excluded)
   -------------------------------------------------------------------------- */

.comparison-two-col,
.included-excluded {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 24px 0;
}

@media (max-width: 700px) {
  .comparison-two-col,
  .included-excluded {
    grid-template-columns: 1fr;
  }
}

.pros-col, .included {
  background: var(--color-ok-bg);
  border: 1px solid #CDE9DA;
  border-radius: var(--radius);
  padding: 22px 24px;
}

.cons-col, .excluded {
  background: var(--color-warning-bg);
  border: 1px solid #F0E1AE;
  border-radius: var(--radius);
  padding: 22px 24px;
}

.pros-col h3, .cons-col h3, .included h3, .excluded h3 {
  margin-top: 0;
  font-size: 1.08rem;
  font-family: var(--font-sans);
}

.pros-col ul, .cons-col ul, .included ul, .excluded ul {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Tables
   -------------------------------------------------------------------------- */

.table-wrap {
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
  font-size: 0.96rem;
}

table.data-table caption {
  text-align: left;
  font-weight: 600;
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-sans);
}

table.data-table th,
table.data-table td {
  padding: 13px 18px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

table.data-table thead th {
  background: var(--color-surface-2);
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}

table.data-table thead th .sort-indicator {
  color: var(--color-muted);
  font-size: 0.8em;
  margin-left: 6px;
}

table.data-table thead th:hover {
  background: var(--color-accent-bg);
}

table.data-table tbody tr:last-child td { border-bottom: none; }
table.data-table tbody tr:hover { background: var(--color-accent-bg); }

.table-caption-note {
  font-size: 0.85rem;
  color: var(--color-muted);
  padding: 12px 18px 16px;
  margin: 0;
}

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

.brand-spotlight {
  background: var(--color-brand-bg);
  border: 1px solid #C8DFF0;
  border-radius: var(--radius-lg);
  padding: 4px;
  margin: 36px 0;
}

.brand-spotlight__badge {
  display: inline-block;
  background: var(--color-brand);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 999px;
  margin: 18px 24px 0;
}

.brand-spotlight__inner {
  padding: 8px 28px 28px;
}

.brand-spotlight__header h3 {
  margin-top: 0.4em;
  margin-bottom: 0.2em;
}

.brand-spotlight__sub {
  color: var(--color-accent-dark);
  font-weight: 500;
  margin-bottom: 1.4em;
}

.brand-spotlight__triplet {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 20px 0;
}

@media (max-width: 820px) {
  .brand-spotlight__triplet { grid-template-columns: 1fr; }
}

.triplet-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.triplet-item strong {
  display: block;
  color: var(--color-accent-dark);
  font-family: var(--font-sans);
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.triplet-item p { margin-bottom: 0; font-size: 0.95rem; }

.brand-spotlight__meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0;
}

.brand-spotlight__meta-row span {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.brand-spotlight__note {
  background: var(--color-surface);
  border-left: 4px solid var(--color-brand);
  border-radius: 6px;
  padding: 14px 18px;
  font-size: 0.94rem;
  color: var(--color-muted);
  margin-bottom: 22px;
}

.brand-spotlight__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-brand);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: 14px 24px;
  border-radius: var(--radius);
  min-height: 44px;
}

.brand-spotlight__cta:hover { background: var(--color-accent-dark); }

/* --------------------------------------------------------------------------
   Operator cards (generic reusable component)
   -------------------------------------------------------------------------- */

.operator-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-card);
}

.operator-card h4 { margin-top: 0; }

/* --------------------------------------------------------------------------
   Infographics
   -------------------------------------------------------------------------- */

.infographic {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin: 28px 0;
  overflow-x: auto;
}

.infographic svg { display: block; margin: 0 auto; }

.infographic figcaption {
  text-align: center;
  font-size: 0.88rem;
  color: var(--color-muted);
  margin-top: 12px;
}

.photo-credit {
  text-align: center;
  font-size: 0.78rem;
  color: var(--color-muted);
  margin-top: 4px;
}

.photo-credit a { color: inherit; }

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

.faq-section { margin-top: 3em; }

.faq-section details {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-section summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 22px;
  font-weight: 600;
  font-family: var(--font-sans);
  font-size: 1.02rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  min-height: 44px;
}

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

.faq-section summary::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--color-accent);
  flex-shrink: 0;
  line-height: 1;
  transition: transform 0.2s ease;
}

.faq-section details[open] summary::after {
  content: '\2212';
}

.faq-section summary:hover { background: var(--color-accent-bg); }

.faq-answer {
  padding: 0 22px 20px;
  color: var(--color-text);
}

.faq-answer p:last-child { margin-bottom: 0; }

/* --------------------------------------------------------------------------
   Verdict / CTA blocks
   -------------------------------------------------------------------------- */

.verdict-block {
  background: var(--color-ok-bg);
  border: 1px solid #CDE9DA;
  border-left: 5px solid var(--color-ok);
  border-radius: var(--radius);
  padding: 26px 28px;
  margin: 32px 0;
}

.verdict-block h2 { margin-top: 0; }

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

.site-footer {
  background: var(--color-surface-2);
  border-top: 1px solid var(--color-border);
  padding: 48px 0 28px;
  margin-top: 60px;
  font-size: 0.94rem;
  color: var(--color-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 32px;
  margin-bottom: 24px;
}

@media (max-width: 700px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-grid strong {
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1.05rem;
}

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

.footer-grid nav a {
  color: var(--color-muted);
  text-decoration: none;
  min-height: 32px;
  display: inline-flex;
  align-items: center;
}
.footer-grid nav a:hover { color: var(--color-accent); text-decoration: underline; }

.footer-legal {
  border-top: 1px solid var(--color-border);
  padding-top: 18px;
  font-size: 0.85rem;
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Page header (secondary pages: methodology / about / privacy)
   -------------------------------------------------------------------------- */

.page-hero {
  padding: 48px 0 24px;
  background: var(--color-accent-bg);
}

.page-hero h1 { max-width: 42rem; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  font-weight: 500;
  margin-bottom: 18px;
}

.page-body { padding: 40px 0 20px; }

.criteria-table-wrap { margin: 28px 0; }

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

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.4rem; }
  .brand-spotlight__inner { padding: 8px 18px 22px; }
  .brand-spotlight__badge { margin: 16px 16px 0; }
}