/* ============================================================
   PANGEA GROUP — Design System v1.0
   Onyx · Champagne Gold · Steel Silver
   "Where energy meets intelligence."
   ============================================================ */

/* ===== TOKENS ===== */
:root {
  --bg-onyx:           #07090C;
  --bg-onyx-deep:      #04060A;
  --bg-onyx-card:      #0D1117;
  --bg-onyx-elevated:  #131922;
  --bg-steel:          #1A222D;

  --bg-paper:          #FFFFFF;
  --bg-cream:          #F7F5EE;
  --bg-mist:           #EFEFEC;
  --bg-warm:           #EBE7DC;

  --text-primary:      #EAEEF3;
  --text-secondary:    #A8B2BD;
  --text-muted:        #5C6873;
  --text-deep:         #2A323D;

  --text-ink:          #0E1219;
  --text-graphite:     #3A4250;
  --text-slate:        #6B7585;

  --gold-bright:       #E0C690;
  --gold:              #C9A96E;
  --gold-warm:         #B89456;
  --gold-deep:         #8C6D3F;
  --gold-pale:         #EBDDB8;
  --gold-soft:         #D9C399;

  --silver-soft:       #D4DCE4;
  --silver:            #B8C2CC;
  --silver-deep:       #6E7A85;
  --silver-dark:       #3D4651;

  --success:           #6B8E5A;
  --error:             #A85842;

  --grad-gold-metal:   linear-gradient(135deg, #8C6D3F 0%, #C9A96E 35%, #EBDDB8 50%, #C9A96E 65%, #8C6D3F 100%);
  --grad-gold-soft:    linear-gradient(135deg, #B89456 0%, #C9A96E 50%, #E0C690 100%);
  --grad-silver-metal: linear-gradient(135deg, #3D4651 0%, #6E7A85 35%, #D4DCE4 50%, #6E7A85 65%, #3D4651 100%);
  --grad-silver-soft:  linear-gradient(135deg, #6E7A85 0%, #B8C2CC 50%, #D4DCE4 100%);

  --font-sans:  'Manrope', ui-sans-serif, system-ui, sans-serif;
  --font-mono:  'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --font-serif: 'Cormorant Garamond', 'Didot', 'Times New Roman', serif;

  --hairline:       1px solid rgba(110, 122, 133, 0.18);
  --hairline-light: 1px solid rgba(14, 18, 25, 0.10);
  --hairline-gold:  1px solid #8C6D3F;

  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.83, 0, 0.17, 1);
  --shadow-gold-glow: 0 0 28px rgba(201, 169, 110, 0.28);

  --container-max: 1440px;
}

/* ===== THEME — Dark (default) ===== */
:root,
[data-theme="dark"] {
  --bg:          var(--bg-onyx);
  --bg-surface:  var(--bg-onyx-card);
  --fg:          var(--text-primary);
  --fg-secondary: var(--text-secondary);
  --fg-muted:    var(--text-muted);
  --border:      rgba(110, 122, 133, 0.18);
  --accent:      var(--gold);
  --accent-soft: var(--gold-soft);
}

/* ===== THEME — Light ===== */
[data-theme="light"] {
  --bg:           var(--bg-paper);
  --bg-surface:   var(--bg-mist);
  --fg:           var(--text-ink);
  --fg-secondary: var(--text-graphite);
  --fg-muted:     var(--text-slate);
  --border:       rgba(14, 18, 25, 0.10);
  --accent:       var(--gold-deep);
  --accent-soft:  var(--gold-warm);
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; padding: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  font-weight: 300;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 250ms ease, color 250ms ease;
}
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; display: block; }
button { font-family: inherit; }

/* ===== LAYOUT ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 80px;
}
@media (max-width: 1024px) { .container { padding: 0 48px; } }
@media (max-width: 640px)  { .container { padding: 0 24px; } }

/* ===== TYPOGRAPHY UTILITIES ===== */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gold-soft);
  font-weight: 500;
  display: block;
}
[data-theme="light"] .eyebrow { color: var(--gold-deep); }

.gold-grad {
  background: var(--grad-gold-soft);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.silver-grad {
  background: var(--grad-silver-soft);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 14px;
  padding: 12px 24px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 220ms var(--ease-out);
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
}
.btn--primary {
  background: var(--silver-dark);
  color: var(--silver-soft);
  border-color: rgba(110, 122, 133, 0.30);
}
.btn--primary:hover {
  background: var(--silver-deep);
  color: var(--text-primary);
  box-shadow: 0 0 24px rgba(110, 122, 133, 0.22);
  transform: translateY(-1px);
}
.btn--secondary {
  background: transparent;
  border-color: var(--silver-deep);
  color: var(--silver);
}
.btn--secondary:hover { background: rgba(110, 122, 133, 0.08); color: var(--silver-soft); }
.btn--ghost {
  background: transparent;
  color: var(--fg-secondary);
  border-color: transparent;
}
.btn--ghost:hover { color: var(--silver-soft); }
.btn--lg { padding: 16px 32px; font-size: 15px; }

/* ===== LOGO (CSS text — uses loaded Google Font so gradient renders correctly) ===== */
.logo-mark {
  display: flex;
  flex-direction: column;
  gap: 4px;
  line-height: 1;
}
.logo-wordmark {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 30px;
  letter-spacing: 0.18em;
  background: var(--grad-silver-metal);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: block;
  line-height: 1;
}
.logo-sub {
  font-family: var(--font-mono);
  font-size: 7.5px;
  font-weight: 400;
  letter-spacing: 0.42em;
  background: var(--grad-gold-metal);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: block;
  text-transform: uppercase;
  white-space: nowrap;
}

/* Footer logo — larger */
.footer-brand .logo-wordmark { font-size: 48px; letter-spacing: 0.18em; }
.footer-brand .logo-sub { font-size: 10px; letter-spacing: 0.5em; }

/* ===== HEADER ===== */
header.site {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(7, 9, 12, 0.78);
  border-bottom: var(--hairline);
  transition: background 250ms ease;
}
[data-theme="light"] header.site {
  background: rgba(247, 245, 238, 0.90);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 80px;
  gap: 32px;
}
@media (max-width: 1024px) { .header-inner { padding: 0 48px; } }
@media (max-width: 640px)  { .header-inner { padding: 0 24px; } }

.logo { display: flex; align-items: center; flex-shrink: 0; }
.logo img, .logo svg { height: 36px; width: auto; }

nav.primary {
  display: flex;
  gap: 32px;
  flex: 1;
  justify-content: center;
}
nav.primary a {
  font-size: 14px;
  color: var(--fg-secondary);
  transition: color 200ms;
  white-space: nowrap;
}
nav.primary a:hover { color: var(--gold-soft); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.lang {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--fg-muted);
  display: flex;
  align-items: center;
  gap: 2px;
  cursor: pointer;
  user-select: none;
}
.lang .active { color: var(--gold-soft); }
.lang .sep { margin: 0 4px; opacity: 0.35; }

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--fg-muted);
  transition: all 200ms;
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--gold-soft); color: var(--gold-soft); }

/* ===== MOBILE HAMBURGER ===== */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
  width: 34px; height: 34px;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  height: 1px;
  background: var(--fg);
  transition: all 250ms var(--ease-out);
  transform-origin: center;
}
.hamburger.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 900px) {
  nav.primary { display: none; }
  .hamburger { display: flex; }
  .header-actions .btn { display: none; }
}

/* ===== MOBILE MENU ===== */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--bg-onyx-deep);
  flex-direction: column;
  padding: 96px 48px 64px;
}
[data-theme="light"] .mobile-menu { background: var(--bg-cream); }
.mobile-menu.open { display: flex; }
.mobile-menu a {
  display: block;
  font-size: clamp(24px, 5vw, 36px);
  font-weight: 200;
  letter-spacing: -0.01em;
  color: var(--fg);
  padding: 20px 0;
  border-bottom: var(--hairline);
  transition: color 200ms;
}
.mobile-menu a:hover { color: var(--gold-soft); }
.mobile-menu .btn {
  margin-top: 40px;
  align-self: flex-start;
  display: inline-flex;
}

/* ===== SECTION GENERIC ===== */
section.section { padding: 120px 0; border-top: var(--hairline); }
section.section h2 {
  font-size: clamp(34px, 4.2vw, 60px);
  font-weight: 200;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 24px 0 32px;
  max-width: 840px;
}
section.section .lead {
  font-size: 19px;
  font-weight: 300;
  max-width: 680px;
  color: var(--fg-secondary);
  margin: 0;
  line-height: 1.62;
}

/* ===== FOOTER ===== */
footer.site {
  background: var(--bg-onyx-deep);
  padding: 80px 0 40px;
  border-top: var(--hairline);
}
[data-theme="light"] footer.site { background: var(--bg-warm); }

.footer-brand { margin-bottom: 48px; }
.footer-brand svg { height: 44px; margin-bottom: 20px; }
.footer-tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 20px;
  color: var(--gold-soft);
  margin: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 48px;
  padding: 48px 0;
  border-top: var(--hairline);
}
@media (max-width: 768px) { .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; } }
@media (max-width: 400px) { .footer-grid { grid-template-columns: 1fr; } }

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.36em;
  color: var(--gold-soft);
  text-transform: uppercase;
  margin: 0 0 20px;
  font-weight: 500;
}
.footer-col a {
  display: block;
  padding: 5px 0;
  color: var(--fg-secondary);
  font-size: 14px;
  transition: color 200ms;
}
.footer-col a:hover { color: var(--gold-soft); }

.footer-bottom {
  padding-top: 32px;
  border-top: var(--hairline);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--fg-muted);
  text-transform: uppercase;
}
.footer-legal { display: flex; gap: 28px; }
.footer-legal a { color: var(--fg-muted); transition: color 200ms; }
.footer-legal a:hover { color: var(--gold-soft); }

/* ===== ANIMATIONS ===== */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 650ms var(--ease-out), transform 650ms var(--ease-out);
}
.fade-up.in-view { opacity: 1; transform: translateY(0); }
.fade-up.d1 { transition-delay: 100ms; }
.fade-up.d2 { transition-delay: 200ms; }
.fade-up.d3 { transition-delay: 300ms; }
.fade-up.d4 { transition-delay: 400ms; }

@media (prefers-reduced-motion: reduce) {
  .fade-up { opacity: 1; transform: none; transition: none; }
}