:root {
  --color-bg: #ffffff;
  --color-text: #1c2230;
  --color-text-muted: #5b6472;
  --color-primary: #003153;
  --color-accent: #c9a24b;
  --color-surface: #f6f7f9;
  --max-width: 1100px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

h1, h2, h3 { line-height: 1.2; font-weight: 700; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: var(--color-bg);
  border-bottom: 1px solid #eceef1;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.logo-mark {
  height: 40px;
  width: auto;
  display: block;
}

.logo span { color: var(--color-accent); }

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color 0.15s ease;
}

.nav-links a:hover { color: var(--color-primary); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

/* Hero */
.hero {
  background: var(--color-primary);
  color: #fff;
  padding: 120px 0;
}

.hero-inner { max-width: 640px; }

.hero h1 {
  font-size: 2.75rem;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 32px;
}

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 6px;
  font-weight: 600;
  transition: opacity 0.15s ease;
}

.btn:hover { opacity: 0.85; }

.btn-primary {
  background: var(--color-accent);
  color: var(--color-primary);
}

/* Services */
.services { padding: 96px 0; }

.services h2, .about h2, .contact h2 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.section-sub {
  color: var(--color-text-muted);
  margin-bottom: 48px;
  max-width: 560px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--color-surface);
  padding: 32px;
  border-radius: 10px;
}

.card h3 {
  margin-bottom: 12px;
  color: var(--color-primary);
  font-size: 1.15rem;
}

.card p { color: var(--color-text-muted); }

/* About */
.about {
  background: var(--color-surface);
  padding: 96px 0;
}

.about-inner { max-width: 720px; }

.about p { color: var(--color-text-muted); font-size: 1.05rem; }

/* Contact */
.contact {
  padding: 96px 0;
  text-align: center;
}

.contact-inner { max-width: 480px; margin: 0 auto; }

.contact p {
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

/* Footer */
.site-footer {
  border-top: 1px solid #eceef1;
  padding: 32px 0;
  text-align: center;
}

.site-footer p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid #eceef1;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease;
  }

  .nav-links.open { max-height: 240px; }

  .nav-links li { border-top: 1px solid #eceef1; }

  .nav-links a {
    display: block;
    padding: 16px 24px;
  }

  .hero { padding: 72px 0; }
  .hero h1 { font-size: 2rem; }

  .cards { grid-template-columns: 1fr; }

  .services, .about, .contact { padding: 64px 0; }
}