:root {
  --navy: #0f2743;
  --navy-dark: #0a1b30;
  --steel: #4a6178;
  --steel-light: #eef1f4;
  --accent: #c9a15a;
  --text: #1c2530;
  --text-muted: #5b6b7a;
  --white: #ffffff;
  --border: #dbe1e7;
  --radius: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.55;
}

a { color: var(--navy); }

/* ---------- Header / nav ---------- */
.site-header {
  background: var(--navy);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white);
  text-decoration: none;
}

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

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--white);
  text-decoration: none;
  font-size: 0.95rem;
  opacity: 0.88;
}

.nav-links a:hover { opacity: 1; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-dark) 100%);
  color: var(--white);
  padding: 72px 24px 88px;
  text-align: center;
}

.hero h1 {
  font-size: 2.4rem;
  margin: 0 0 16px;
  font-weight: 700;
}

.hero p {
  font-size: 1.1rem;
  color: #cfd8e2;
  max-width: 620px;
  margin: 0 auto 28px;
}

.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

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

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(201, 161, 90, 0.35);
}

.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.4);
}

.btn-secondary:hover {
  border-color: var(--white);
}

/* ---------- Main content sections ---------- */
.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 64px 24px;
}

.section-narrow {
  max-width: 760px;
}

.section h2 {
  font-size: 1.7rem;
  margin: 0 0 12px;
}

.section .lede {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 40px;
  max-width: 640px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--white);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.card:hover {
  box-shadow: 0 10px 30px rgba(15, 39, 67, 0.08);
  transform: translateY(-2px);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.2rem;
}

.card p {
  color: var(--text-muted);
  font-size: 0.96rem;
  margin: 0 0 18px;
}

.tag {
  display: inline-block;
  background: var(--steel-light);
  color: var(--steel);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.card-link {
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}

.card-link::after {
  content: " \2192";
}

/* ---------- Tool page ---------- */
.tool-header {
  background: var(--steel-light);
  padding: 40px 24px 32px;
  text-align: center;
}

.tool-header h1 {
  margin: 0 0 10px;
  font-size: 1.9rem;
  color: var(--navy);
}

.tool-header p {
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
}

.tool-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  margin-top: 22px;
  flex-wrap: wrap;
}

.btn-outline {
  background: var(--white);
  color: var(--navy);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--navy);
}

.fallback-note {
  max-width: 1100px;
  margin: 20px auto 0;
  padding: 12px 24px;
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
}

.fallback-note a {
  font-weight: 600;
}

.embed-wrap {
  max-width: 1180px;
  margin: 28px auto 64px;
  padding: 0 24px;
}

.embed-frame-box {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 12px 36px rgba(15, 39, 67, 0.08);
  background: var(--white);
}

.embed-frame-box iframe {
  display: block;
  width: 100%;
  height: 1400px;
  border: 0;
}

@media (max-width: 640px) {
  .embed-frame-box iframe {
    height: 1000px;
  }
  .hero h1 { font-size: 1.9rem; }
  .nav-wrap { flex-wrap: wrap; gap: 8px 16px; padding: 14px 16px; }
  .nav-links { gap: 16px; flex-wrap: wrap; }
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy-dark);
  color: #9fb0c0;
  text-align: center;
  padding: 32px 24px;
  font-size: 0.85rem;
}

.site-footer a {
  color: #cfd8e2;
}