/* Arctic Expedition Editorial — global.css
   Tokens compiled from DESIGN.md. Reset, typography, header, footer, layout. */

:root {
  --color-background: #011428;
  --color-surface: #011428;
  --color-surface-dim: #011428;
  --color-surface-bright: #293a50;
  --color-surface-container-lowest: #000f21;
  --color-surface-container-low: #091c31;
  --color-surface-container: #0e2035;
  --color-surface-container-high: #192b40;
  --color-surface-container-highest: #24364b;
  --color-on-surface: #d2e4ff;
  --color-on-surface-variant: #c5c6cd;
  --color-inverse-surface: #d2e4ff;
  --color-inverse-on-surface: #203147;
  --color-outline: #8f9097;
  --color-outline-variant: #44474c;

  --color-primary: #bbc7dd;
  --color-secondary: #bcc8d0;
  --color-secondary-fixed: #d8e4ec;
  --color-tertiary: #feb874;

  --color-glacier-white: #F4F8FA;
  --color-permafrost-grey: #4A5D6E;
  --color-sunset-copper: #E2A56B;
  --color-polar-navy-light: #1E314A;

  --font-headline: 'Bebas Neue', sans-serif;
  --font-body: 'Fira Sans', sans-serif;
  --font-caption: 'Source Serif 4', serif;

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

  --unit: 8px;
  --max-width: 1280px;
  --gutter: 24px;
  --margin-mobile: 16px;
  --margin-desktop: 64px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-surface-container-lowest);
  color: var(--color-on-surface);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 28px;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

::selection {
  background: var(--color-sunset-copper);
  color: var(--color-surface-container-lowest);
}

h1, h2, h3, h4, p, ul, blockquote, figure { margin: 0; padding: 0; }
ul { list-style: none; }

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

.eyebrow {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  line-height: 16px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-sunset-copper);
  display: block;
  margin-bottom: 8px;
}

.h-display {
  font-family: var(--font-headline);
  font-weight: 400;
  text-transform: uppercase;
  color: var(--color-glacier-white);
  line-height: 40px;
  font-size: 36px;
  letter-spacing: normal;
}
@media (min-width: 768px) {
  .h-display { font-size: 48px; line-height: 52px; letter-spacing: 0.01em; }
}

.h-section {
  font-family: var(--font-headline);
  font-weight: 400;
  font-size: 32px;
  line-height: 36px;
  text-transform: uppercase;
  color: var(--color-glacier-white);
}

.h-card {
  font-family: var(--font-headline);
  font-weight: 400;
  font-size: 26px;
  line-height: 32px;
  text-transform: uppercase;
}

.label-caps {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  line-height: 16px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.body-lg { font-family: var(--font-body); font-size: 18px; line-height: 30px; }
.body-md { font-family: var(--font-body); font-size: 16px; line-height: 28px; }
.caption-serif { font-family: var(--font-caption); font-size: 14px; line-height: 20px; color: var(--color-on-surface-variant); }

.section {
  padding: 64px 0;
  border-top: 1px solid rgba(30, 49, 74, 0.2);
}
@media (min-width: 768px) {
  .section { padding: 128px 0; }
}
.section--tint { background: var(--color-surface-container); }
.section--tint-high { background: var(--color-surface-container-highest); }

.section-header { margin-bottom: 48px; }
.section-header--center { margin-left: auto; margin-right: auto; text-align: center; }
.section-header p { color: var(--color-on-surface-variant); }

/* Film grain texture */
.film-grain { position: relative; }
.film-grain::before {
  content: "";
  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='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 10;
}

/* Topographic divider texture, used behind ethics/CTA sections */
.topo-overlay {
  position: absolute;
  inset: 0;
  opacity: 0.2;
  background-image: repeating-linear-gradient(45deg, #1E314A 0, #1E314A 1px, transparent 1px, transparent 10px);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 16px 40px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}
.btn-primary {
  background: var(--color-sunset-copper);
  color: var(--color-surface-container-lowest);
}
.btn-primary:hover { background: var(--color-tertiary); }
.btn-primary:focus-visible { outline: 2px solid var(--color-glacier-white); outline-offset: 2px; }
.btn-primary:active { transform: scale(0.98); }

/* Header / Nav */
.site-header {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  z-index: 50;
  background: rgba(1, 20, 40, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(30, 49, 74, 0.2);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}
.site-header.is-scrolled {
  background: rgba(1, 20, 40, 0.95);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}
.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 84px;
}
.site-logo {
  font-family: var(--font-headline);
  font-size: 24px;
  line-height: 28px;
  color: var(--color-sunset-copper);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  white-space: nowrap;
}
@media (min-width: 768px) {
  .site-logo { font-size: 42px; line-height: 46px; }
}
.nav-toggle {
  display: block;
  background: none;
  border: none;
  color: var(--color-on-surface-variant);
  padding: 8px;
  cursor: pointer;
}
.nav-toggle:hover { color: var(--color-sunset-copper); }
.site-nav {
  display: none;
  position: absolute;
  top: 84px;
  left: 0;
  width: 100%;
  flex-direction: column;
  gap: 8px;
  background: var(--color-surface-container-lowest);
  border-bottom: 1px solid rgba(30, 49, 74, 0.2);
  padding: var(--margin-mobile);
}
.site-nav.is-open { display: flex; }
.site-nav a {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-on-surface-variant);
  padding: 12px 0;
  transition: color 0.3s ease;
}
.site-nav a:hover, .site-nav a.active { color: var(--color-sunset-copper); }
.site-nav .btn-primary { color: var(--color-surface-container-lowest); }

@media (min-width: 768px) {
  .nav-toggle { display: none; }
  .site-nav {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    gap: 32px;
    width: auto;
    background: none;
    border: none;
    padding: 0;
  }
  .site-nav a { padding: 0; }
  .site-nav .btn-primary { padding: 8px 24px; }
}

/* Footer */
.site-footer {
  background: var(--color-surface-container-lowest);
  border-top: 1px solid rgba(30, 49, 74, 0.2);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 64px var(--margin-mobile);
  display: flex;
  flex-direction: column;
  gap: 48px;
}
@media (min-width: 768px) {
  .site-footer {
    padding: 64px var(--margin-desktop);
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}
.footer-brand__logo {
  font-family: var(--font-headline);
  font-size: 36px;
  line-height: 40px;
  color: var(--color-glacier-white);
  text-transform: uppercase;
}
@media (min-width: 768px) {
  .footer-brand__logo { font-size: 48px; line-height: 52px; }
}
.footer-brand__copy {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-on-surface-variant);
  max-width: 320px;
  line-height: 1.7;
  margin-top: 24px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.footer-links a {
  color: var(--color-on-surface-variant);
  transition: color 0.2s ease;
}
.footer-links a:hover, .footer-links a:focus-visible { color: var(--color-glacier-white); }
.footer-links a:focus-visible { outline: 1px solid var(--color-sunset-copper); outline-offset: 2px; }
.footer-links a.footer-links__cta {
  color: var(--color-sunset-copper);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 8px;
}
.footer-links a.footer-links__cta:hover { color: var(--color-glacier-white); }

/* Legal / simple content pages */
.legal-page {
  padding-top: 148px;
  padding-bottom: 64px;
}
.legal-page h1 { margin-bottom: 16px; }
.legal-page .eyebrow { margin-top: 24px; }
.legal-page h2 {
  font-family: var(--font-headline);
  font-weight: 400;
  font-size: 26px;
  line-height: 32px;
  text-transform: uppercase;
  color: var(--color-glacier-white);
  margin-top: 40px;
  margin-bottom: 12px;
}
.legal-page p, .legal-page li {
  color: var(--color-on-surface-variant);
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 42rem;
}
.legal-page ul { padding-left: 20px; list-style: disc; }
.legal-page a { color: var(--color-sunset-copper); text-decoration: underline; }
.legal-page a:hover { color: var(--color-glacier-white); }

/* Wide variant: body copy stretches to the full container width (header width) */
.legal-page--wide p, .legal-page--wide li { max-width: none; }

/* Centered variant: all page content centered (used on Contact) */
.legal-page--center { text-align: center; }
.legal-page--center p, .legal-page--center .form-note {
  max-width: 42rem;
  margin-left: auto;
  margin-right: auto;
}
.legal-page--center form {
  max-width: 32rem;
  margin: 0 auto;
  text-align: left;
}

/* Form fields (DESIGN.md "Input Fields": dark, 1px ice-blue border, amber focus glow) */
.form-field { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; max-width: 32rem; }
.form-field label {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-on-surface-variant);
}
.form-field input,
.form-field select,
.form-field textarea {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-glacier-white);
  background: var(--color-surface-container-low);
  border: 1px solid var(--color-polar-navy-light);
  border-radius: var(--radius);
  padding: 12px 16px;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-bottom: 2px solid var(--color-sunset-copper);
  box-shadow: 0 1px 8px rgba(226, 165, 107, 0.35);
}
.form-field textarea { resize: vertical; min-height: 120px; }
.form-note {
  color: var(--color-on-surface-variant);
  font-size: 14px;
  max-width: 32rem;
  margin-top: -8px;
  margin-bottom: 24px;
}