:root {
  --navy: #0f2b46;
  --navy-dark: #0a1d30;
  --accent: #c8a24a;
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --text: #1d2733;
  --text-muted: #5a6673;
  --border: #e3e7ec;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', 'Sarabun', 'Noto Sans Thai', system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 { line-height: 1.3; margin: 0 0 12px; }
h2 { font-size: 1.8rem; margin-bottom: 24px; }
p { margin: 0 0 12px; color: var(--text-muted); }

a { color: var(--navy); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--navy);
  text-decoration: none;
}
.brand:hover { text-decoration: none; }

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
}

.brand-text {
  font-size: 1.05rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav a {
  color: var(--text);
  font-weight: 500;
}
.nav a:hover { color: var(--navy); text-decoration: none; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

.lang-switch {
  display: flex;
  gap: 4px;
}

.lang-switch button {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 9px;
  border-radius: 999px;
  cursor: pointer;
}

.lang-switch button:hover { border-color: var(--navy); color: var(--navy); }

.lang-switch button.active {
  background: var(--navy);
  border-color: var(--navy);
  color: #fff;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none !important;
  border: 2px solid transparent;
  transition: opacity .15s ease;
}
.btn:hover { opacity: 0.85; }

.btn-primary { background: var(--navy); color: #fff; }
.btn-outline { border-color: var(--navy); color: var(--navy); padding: 8px 18px; }
.btn-ghost { border-color: var(--border); color: var(--text); }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-dark) 100%);
  color: #fff;
  padding: 96px 0;
}

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

.hero h1 {
  font-size: 2.4rem;
  margin-bottom: 20px;
}

.hero-sub {
  color: #cfd9e6;
  font-size: 1.1rem;
  margin-bottom: 32px;
}

.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
.hero .btn-ghost { border-color: rgba(255,255,255,0.4); color: #fff; }

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); }
.lead { font-size: 1.05rem; max-width: 760px; }
.section-note {
  font-size: 0.85rem;
  color: #9aa4b2;
  margin-bottom: 28px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.section-alt .card { background: #fff; }
.card h3 { color: var(--navy); font-size: 1.05rem; }
.card p { margin-bottom: 0; font-size: 0.95rem; }

.fb-embed-wrap {
  display: flex;
  justify-content: center;
  overflow-x: auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}
.contact-item h4 {
  color: var(--accent);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}
.contact-item p { color: var(--text); }

/* Footer */
.site-footer {
  background: var(--navy-dark);
  color: #a9b4c2;
  padding: 24px 0;
  text-align: center;
  font-size: 0.85rem;
}
.site-footer p { color: inherit; margin: 0; }

/* Responsive */
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    display: none;
    padding: 8px 24px 16px;
  }
  .nav.open { display: flex; }
  .nav a { width: 100%; padding: 12px 0; border-bottom: 1px solid var(--border); }
  .nav .btn { margin-top: 8px; }
  .hero { padding: 64px 0; }
  .hero h1 { font-size: 1.8rem; }
  .nav-right { gap: 10px; }
  .lang-switch button { padding: 4px 6px; font-size: 0.7rem; }
}

@media (max-width: 460px) {
  .brand-text { display: none; }
}