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

:root {
  --navy: #1B2A47;
  --navy-mid: #2d4270;
  --amber: #D4A017;
  --cream: #FAF8F3;
  --ink: #1B2A47;
  --ink-mid: #4a5568;
  --ink-light: #718096;
  --border: #e2ddd4;
  --red: #c0392b;
}

html { font-size: 16px; }

body {
  background: var(--cream);
  color: var(--ink);
  font-family: Georgia, 'Times New Roman', serif;
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Nav ── */
nav {
  background: var(--navy);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

nav a.brand {
  color: #fff;
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: bold;
  letter-spacing: 0.02em;
}

nav a.brand span {
  color: var(--amber);
}

nav .nav-links {
  display: flex;
  gap: 24px;
}

nav .nav-links a {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  font-size: 0.85rem;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  transition: color 0.15s;
}

nav .nav-links a:hover { color: #fff; }
nav .nav-links a.active { color: #fff; }

/* ── Main ── */
main {
  flex: 1;
  max-width: 720px;
  width: 100%;
  margin: 48px auto 80px;
  padding: 0 24px;
}

/* ── Page header ── */
.page-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 2px solid var(--navy);
}

.page-header h1 {
  font-size: 1.9rem;
  color: var(--navy);
  line-height: 1.25;
  margin-bottom: 8px;
}

.page-header .meta {
  color: var(--ink-light);
  font-size: 0.85rem;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ── Typography ── */
h2 {
  font-size: 1.2rem;
  color: var(--navy);
  margin-top: 40px;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 1rem;
  color: var(--navy);
  margin-top: 24px;
  margin-bottom: 8px;
  font-style: italic;
}

p {
  margin-bottom: 16px;
  color: var(--ink-mid);
}

p:last-child { margin-bottom: 0; }

ul, ol {
  margin: 0 0 16px 24px;
  color: var(--ink-mid);
}

li { margin-bottom: 6px; }

a { color: var(--navy-mid); }
a:hover { color: var(--amber); }

strong { color: var(--ink); }

/* ── Table ── */
.table-wrap { overflow-x: auto; margin: 16px 0 24px; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

th {
  background: var(--navy);
  color: #fff;
  text-align: left;
  padding: 10px 14px;
  font-weight: 600;
}

td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--ink-mid);
  vertical-align: top;
}

tr:last-child td { border-bottom: none; }
tr:nth-child(even) td { background: rgba(0,0,0,0.025); }

/* ── Callout box ── */
.callout {
  border-left: 3px solid var(--amber);
  background: rgba(212,160,23,0.06);
  padding: 14px 18px;
  margin: 20px 0;
  border-radius: 0 6px 6px 0;
}

.callout p { color: var(--ink); margin: 0; }

/* ── Steps ── */
.steps {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  counter-reset: step;
}

.steps li {
  counter-increment: step;
  display: flex;
  gap: 14px;
  margin-bottom: 12px;
  color: var(--ink-mid);
}

.steps li::before {
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--navy);
  color: #fff;
  font-size: 0.75rem;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 700;
  margin-top: 2px;
  flex-shrink: 0;
}

/* ── Note box ── */
.note {
  background: rgba(27,42,71,0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 24px 0;
  font-size: 0.875rem;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--ink-mid);
}

.note strong { color: var(--ink); }

/* ── Footer ── */
footer {
  background: var(--navy);
  color: rgba(255,255,255,0.55);
  text-align: center;
  padding: 24px;
  font-size: 0.8rem;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

footer a { color: rgba(255,255,255,0.75); }
footer a:hover { color: #fff; }

/* ── Responsive ── */
@media (max-width: 600px) {
  nav .nav-links { gap: 14px; }
  nav .nav-links a { font-size: 0.8rem; }
  main { margin: 28px auto 60px; }
  .page-header h1 { font-size: 1.5rem; }
  h2 { font-size: 1.1rem; }
}