/* ── Design tokens ─────────────────────────────────────────────────────────── */
:root {
  --blue-950:  #04142e;
  --blue-900:  #0a2150;
  --blue-800:  #0f3178;
  --blue-700:  #1749a0;
  --blue-600:  #1e62cc;
  --blue-500:  #2e7fe8;
  --blue-400:  #5c9ff0;
  --blue-200:  #b8d4f8;
  --blue-100:  #ddeafc;
  --blue-50:   #f0f6ff;

  --gold-600:  #b8730a;
  --gold-500:  #d4880f;
  --gold-400:  #f0a020;
  --gold-300:  #f5bc54;
  --gold-200:  #fad88a;
  --gold-100:  #fdf0cc;

  --white:     #ffffff;
  --gray-100:  #f4f6f9;
  --gray-200:  #e4e8ef;
  --gray-400:  #9aa4b8;
  --gray-600:  #5a6478;
  --gray-800:  #2a3142;
  --gray-900:  #161c2d;

  --font-display: 'Geologica', sans-serif;
  --font-body:    'Noto Sans', sans-serif;

  --header-h:  72px;
  --nav-h:     48px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:  0 4px 12px rgba(0,0,0,.10), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg:  0 12px 32px rgba(0,0,0,.14), 0 4px 8px rgba(0,0,0,.08);
  --shadow-blue: 0 4px 20px rgba(30,98,204,.30);

  --transition: 200ms cubic-bezier(.4,0,.2,1);
}

/* ── Reset & base ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  color: var(--gray-800);
  background: var(--gray-100);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

main { flex: 1; }

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
img { display: block; max-width: 100%; }

/* ── HEADER ────────────────────────────────────────────────────────────────── */
.site-header {
  height: var(--header-h);
  background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-700) 60%, var(--blue-600) 100%);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-blue);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  transition: opacity var(--transition);
}
.site-logo:hover { opacity: .88; }

.logo-emblem {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,.25));
}
.logo-emblem svg { width: 100%; height: 100%; }

.logo-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.logo-abbr {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: .04em;
  line-height: 1;
}
.logo-full {
  font-size: 11px;
  font-weight: 400;
  color: var(--blue-200);
  letter-spacing: .02em;
  line-height: 1.3;
  max-width: 240px;
}

/* Language switcher */
.lang-switcher { flex-shrink: 0; }

.lang-options {
  display: flex;
  gap: 4px;
  background: rgba(255,255,255,.12);
  border-radius: 8px;
  padding: 3px;
}

.lang-btn {
  padding: 5px 12px;
  border-radius: 6px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--blue-100);
  transition: background var(--transition), color var(--transition);
}
.lang-btn:hover { background: rgba(255,255,255,.18); color: var(--white); }
.lang-btn--active {
  background: var(--white);
  color: var(--blue-800);
}

/* ── NAVIGATION ────────────────────────────────────────────────────────────── */
.site-nav {
  height: var(--nav-h);
  background: var(--blue-800);
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  height: 100%;
}

.nav-link {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 14px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--blue-200);
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
  white-space: nowrap;
}
.nav-link:hover {
  color: var(--white);
  background: rgba(255,255,255,.06);
  border-bottom-color: var(--gold-400);
}
.nav-link.active {
  color: var(--white);
  border-bottom-color: var(--gold-400);
}

/* Mobile toggle (hidden on desktop) */
.nav-toggle { display: none; }

/* ── FOOTER ────────────────────────────────────────────────────────────────── */
.site-footer {
  background: var(--blue-950);
  color: var(--blue-200);
  margin-top: auto;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 40px 24px 24px;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: start;
  gap: 40px;
}

.footer-logo-abbr {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  display: block;
  margin-bottom: 6px;
}

.footer-tagline {
  font-size: 13px;
  color: var(--blue-400);
  max-width: 280px;
  line-height: 1.5;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 13px;
  color: var(--blue-200);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--gold-300); }

.footer-social {
  display: flex;
  gap: 8px;
}
.social-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--blue-200);
  transition: background var(--transition), color var(--transition);
  border: 1px solid rgba(255,255,255,.1);
}
.social-btn:hover { background: var(--gold-500); color: var(--white); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.07);
  padding: 16px 24px;
  text-align: center;
  font-size: 12px;
  color: var(--gray-400);
}

/* ── Utility classes ───────────────────────────────────────────────────────── */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .02em;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--blue-600);
  color: var(--white);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--blue-700);
  box-shadow: var(--shadow-blue);
}

.btn-gold {
  background: var(--gold-500);
  color: var(--white);
}
.btn-gold:hover { background: var(--gold-600); }

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .logo-full { display: none; }
  .logo-abbr { font-size: 18px; }

  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    margin-left: auto;
  }
  .nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--blue-200);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
  }
  .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); }

  .site-nav { height: auto; }
  .nav-inner { flex-direction: column; align-items: stretch; padding: 0; }

  .nav-list {
    flex-direction: column;
    height: auto;
    gap: 0;
    display: none;
    border-top: 1px solid rgba(255,255,255,.08);
  }
  .nav-list.open { display: flex; }

  .nav-link {
    height: 44px;
    padding: 0 20px;
    border-bottom: none;
    border-left: 2px solid transparent;
  }
  .nav-link:hover { border-left-color: var(--gold-400); border-bottom-color: transparent; }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}