:root {
  --bg: #f7f8fa;
  --text: #1f2937;
  --navy: #0b1f3b;
  --gold: #c9a227;
  --card: #ffffff;
}

body.dark {
  --bg: #0b1220;
  --text: #e5e7eb;
  --card: #111827;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 0 1rem;
}

/* HEADER */
.header {
  background: var(--card);
  border-bottom: 1px solid #e5e7eb;
  position: sticky;
  top: 0;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--navy);
  font-weight: 700;
}

.site-logo {
  height: 34px;
}

.nav-links {
  display: flex;
  gap: 1rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
}

.nav-actions {
  display: flex;
  gap: 0.6rem;
}

.hamburger, .theme-toggle {
  background: none;
  border: none;
  font-size: 1.3rem;
}

/* HERO */
.hero {
  background: linear-gradient(135deg, var(--navy), #102a52);
  color: white;
  padding: 4rem 0;
}

.hero h1 { font-size: 2.2rem; }

.btn {
  padding: 0.7rem 1.3rem;
  text-decoration: none;
  border-radius: 4px;
}

.primary { background: var(--gold); color: #111; }
.secondary { border: 1px solid white; color: white; }

/* SECTIONS */
.section { padding: 3rem 0; }

.card {
  background: var(--card);
  padding: 1.5rem;
  margin-top: 1rem;
  border-radius: 6px;
}

/* FOOTER */
.footer {
  background: #111827;
  color: #9ca3af;
  text-align: center;
  padding: 2rem 0;
}

.tagline { color: var(--gold); }

/* MOBILE */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--card);
  }

  .nav-links.show { display: flex; }

  .hamburger { display: block; }
}