/* CentryAI — Shared Styles */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,400&family=DM+Mono:wght@400;500&display=swap');

:root {
  --bg: #07090f;
  --bg2: #0d1120;
  --bg3: #111827;
  --surface: #131b2e;
  --surface2: #1a2540;
  --border: rgba(255,255,255,0.07);
  --border2: rgba(255,255,255,0.12);
  --fg: oklch(96% 0.01 265);
  --fg2: oklch(75% 0.03 265);
  --fg3: oklch(55% 0.04 265);
  --brand-navy: #1a1f4d;
  --brand-navy-deep: #0f1238;
  --brand-blue: #4b7af5;
  --brand-blue-light: #6c8fe3;
  --accent: #4b7af5;
  --accent-glow: rgba(75, 122, 245, 0.3);
  --accent-dim: rgba(75, 122, 245, 0.15);
  --teal: oklch(72% 0.18 185);
  --teal-dim: oklch(72% 0.18 185 / 0.15);
  --red: oklch(62% 0.2 25);
  --radius: 12px;
  --radius-lg: 20px;
}

[data-theme="light"] {
  --bg: #f8f7f5;
  --bg2: #f0eff0;
  --bg3: #e8e7ea;
  --surface: #ffffff;
  --surface2: #f3f2f5;
  --border: rgba(0,0,0,0.07);
  --border2: rgba(0,0,0,0.12);
  --fg: oklch(10% 0.01 265);
  --fg2: oklch(35% 0.03 265);
  --fg3: oklch(55% 0.04 265);
  --accent-glow: oklch(62% 0.22 265 / 0.15);
  --accent-dim: oklch(62% 0.22 265 / 0.1);
  --teal-dim: oklch(72% 0.18 185 / 0.12);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

/* Nav */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 0 2rem;
  height: 64px;
  display: flex; align-items: center; justify-content: space-between;
  background: transparent;
  transition: background 0.3s, backdrop-filter 0.3s, border-bottom 0.3s;
}
.nav.scrolled {
  background: color-mix(in oklch, var(--bg) 85%, transparent);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  color: var(--fg);
  text-decoration: none;
  display: flex; align-items: center; gap: 8px;
}
.nav-logo-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.nav-logo-mark {
  width: 30px; height: 30px;
  display: block;
}
.nav-logo-text .accent-letters { color: var(--brand-blue); }

/* Language switcher */
#sr-lang-mount { display: inline-block; }
.lang-switcher {
  position: relative;
  display: inline-block;
}
.lang-btn {
  display: inline-flex; align-items: center; gap: 6px;
  height: 36px;
  padding: 0 10px;
  border-radius: 8px;
  background: var(--surface);
  border: 1px solid var(--border2);
  color: var(--fg2);
  cursor: pointer;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  transition: all 0.15s;
}
.lang-btn:hover { color: var(--fg); background: var(--surface2); }
.lang-btn .globe { font-size: 0.95rem; }
.lang-btn .chev { font-size: 0.6rem; opacity: 0.6; }
.lang-menu {
  position: absolute;
  top: calc(100% + 6px); right: 0;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: 12px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.35);
  padding: 6px;
  width: 220px;
  max-height: 340px;
  overflow-y: auto;
  display: none;
  z-index: 150;
}
.lang-menu.open { display: block; }
.lang-opt {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--fg2);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.12s, color 0.12s;
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  font-family: 'DM Sans', sans-serif;
}
.lang-opt:hover { background: var(--bg2); color: var(--fg); }
.lang-opt.active { background: var(--accent-dim); color: var(--accent); font-weight: 600; }
.lang-opt .native { color: var(--fg3); font-size: 0.75rem; }
.lang-opt.active .native { color: var(--accent); opacity: 0.8; }
.nav-links {
  display: flex; align-items: center; gap: 2rem;
  list-style: none;
}
.nav-links a {
  color: var(--fg2);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
  white-space: nowrap;
}
.nav-links li { white-space: nowrap; }
.nav-logo-text { white-space: nowrap; }
.nav-links a:hover { color: var(--fg); }
.nav-actions { display: flex; align-items: center; gap: 12px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: white;
}
.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px var(--accent-glow);
}
.btn-ghost {
  background: transparent;
  color: var(--fg2);
  border: 1px solid var(--border2);
}
.btn-ghost:hover {
  background: var(--surface);
  color: var(--fg);
}
.btn-sm { padding: 7px 14px; font-size: 0.82rem; }

.theme-toggle {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: var(--surface);
  border: 1px solid var(--border2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--fg2);
  font-size: 1rem;
  transition: all 0.2s;
}
.theme-toggle:hover { color: var(--fg); background: var(--surface2); }

/* Footer */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
}
.footer-brand p {
  color: var(--fg3);
  font-size: 0.85rem;
  margin-top: 0.75rem;
  max-width: 240px;
  line-height: 1.6;
}
.footer-col h4 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg3);
  margin-bottom: 1rem;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 0.5rem; }
.footer-col ul a {
  color: var(--fg2);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s;
}
.footer-col ul a:hover { color: var(--fg); }
.footer-bottom {
  max-width: 1100px;
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
}
.footer-bottom p { color: var(--fg3); font-size: 0.82rem; }

/* Legal / Info pages */
.page-hero {
  padding: 120px 2rem 60px;
  max-width: 800px;
  margin: 0 auto;
}
.page-hero h1 {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}
.page-hero .subtitle {
  color: var(--fg3);
  font-size: 0.9rem;
}
.page-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 2rem 6rem;
}
.page-content h2 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  margin: 2.5rem 0 0.75rem;
  color: var(--fg);
}
.page-content h3 {
  font-weight: 600;
  font-size: 1rem;
  margin: 1.5rem 0 0.5rem;
  color: var(--fg);
}
.page-content p {
  color: var(--fg2);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 0.75rem;
}
.page-content ul {
  color: var(--fg2);
  font-size: 0.95rem;
  line-height: 1.8;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
}
.page-content a {
  color: var(--accent);
  text-decoration: none;
}
.page-content a:hover { text-decoration: underline; }
.page-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* Animations */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.fade-up { animation: fadeUp 0.6s ease forwards; }
.fade-in { animation: fadeIn 0.6s ease forwards; }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 480px) {
  .footer-inner { grid-template-columns: 1fr; }
}