/* Guides: static pages beside the calculator, in its colours.
   Plain HTML, no JavaScript, so search engines and screen readers get
   every word without running the app. */
:root {
  --primary: #1d70b8;
  --primary-dark: #003078;
  --primary-light: #e8f1fb;
  --success: #00703c;
  --success-bg: #f3fff6;
  --warning-bg: #fff7e6;
  --warning-border: #ffd388;
  --text: #0b0c0c;
  --text-2: #505a5f;
  --bg: #f3f2f1;
  --surface: #ffffff;
  --border: #b1b4b6;
  --border-light: #e0e0e0;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; font-family: var(--font); font-size: 17px; line-height: 1.6; color: var(--text);
  background: linear-gradient(160deg, #001b4d 0%, #003078 45%, #004994 100%) fixed;
  min-height: 100vh;
}
a { color: var(--primary); text-underline-offset: 0.15em; }
a:hover { color: var(--primary-dark); }
a:focus-visible, .btn:focus-visible { outline: 3px solid #ffdd00; outline-offset: 0; box-shadow: 0 4px 0 #0b0c0c; }

.page { max-width: 760px; margin: 0 auto; padding: 32px 20px 48px; }
.sheet {
  background: var(--bg); border-radius: 16px; overflow: hidden;
  box-shadow: 0 32px 64px rgba(0,0,0,0.45), 0 8px 24px rgba(0,0,0,0.3), 0 0 0 1px rgba(255,255,255,0.06);
}

/* Top bar */
.bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 24px; background: var(--surface); border-bottom: 1px solid var(--border-light); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 16px; line-height: 1.2; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.brand small { display: block; font-weight: 400; font-size: 13px; color: var(--text-2); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--success); color: #fff; font-weight: 700; font-size: 16px; line-height: 1.2;
  text-decoration: none; padding: 11px 16px; border-radius: 8px; box-shadow: 0 2px 0 #002d18;
}
.btn:hover { background: #005a30; color: #fff; }
.bar .btn { font-size: 15px; padding: 9px 14px; }

.content { padding: 24px 24px 32px; }
.crumbs { font-size: 14px; color: var(--text-2); margin: 0 0 16px; }
.crumbs a { color: var(--text-2); }
.crumbs span[aria-hidden] { margin: 0 6px; }

.title-block { display: flex; gap: 12px; margin-bottom: 20px; }
.title-block::before { content: ''; width: 5px; border-radius: 2px; background: var(--primary); flex-shrink: 0; }
.label { font-size: 15px; color: var(--text-2); text-transform: uppercase; letter-spacing: 0.5px; margin: 0 0 4px; }
h1 { font-size: 32px; line-height: 1.15; margin: 0 0 8px; letter-spacing: -0.01em; }
.lede { font-size: 19px; margin: 0; }
.updated { font-size: 14px; color: var(--text-2); margin: 8px 0 0; }

h2 { font-size: 24px; line-height: 1.25; margin: 36px 0 12px; }
h3 { font-size: 19px; margin: 24px 0 8px; }
p, ul, ol { margin: 0 0 14px; }
ul, ol { padding-left: 24px; }
li + li { margin-top: 6px; }

/* Key figures */
.figures { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; margin: 20px 0 8px; }
.figure { background: var(--surface); border: 1px solid var(--border-light); border-radius: 12px; padding: 14px 16px; }
.figure b { display: block; font-size: 28px; line-height: 1.15; color: var(--primary-dark); font-variant-numeric: tabular-nums; }
.figure span { display: block; font-size: 15px; color: var(--text-2); margin-top: 4px; }

/* Tables */
.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border-light); border-radius: 12px; margin: 16px 0; }
table { width: 100%; border-collapse: collapse; font-size: 16px; }
caption { text-align: left; font-weight: 700; padding: 12px 14px 0; }
th, td { text-align: left; padding: 10px 14px; vertical-align: top; }
thead th { font-size: 14px; color: var(--text-2); border-bottom: 2px solid var(--border-light); }
tbody tr + tr th, tbody tr + tr td { border-top: 1px solid var(--border-light); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }

/* Jump links within a long guide */
.jump { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 8px; }
.jump a { font-size: 15px; font-weight: 700; text-decoration: none; background: var(--surface); border: 1px solid var(--border-light); border-radius: 999px; padding: 6px 14px; }
.jump a:hover { border-color: var(--primary); }
h2[id] { scroll-margin-top: 16px; }

/* Callouts */
.note { background: var(--primary-light); border-left: 5px solid var(--primary); padding: 14px 16px; border-radius: 0 8px 8px 0; margin: 16px 0; }
.note p:last-child, .warn p:last-child { margin-bottom: 0; }
.warn { background: var(--warning-bg); border-left: 5px solid #f47738; padding: 14px 16px; border-radius: 0 8px 8px 0; margin: 16px 0; }

.cta { background: var(--surface); border: 1px solid var(--border-light); border-radius: 12px; padding: 20px; margin: 32px 0 8px; }
.cta h2 { margin: 0 0 6px; font-size: 21px; }
.cta p { color: var(--text-2); }
.cta .btn { margin-top: 4px; }
.cta .alt { display: inline-block; margin: 12px 0 0 12px; font-size: 15px; }

.sources { font-size: 15px; }
.sources li { margin-top: 4px; }

.related { list-style: none; padding: 0; display: grid; gap: 8px; }
.related li { margin: 0; }
.related a { display: block; background: var(--surface); border: 1px solid var(--border-light); border-radius: 10px; padding: 12px 14px; text-decoration: none; font-weight: 700; }
.related a span { display: block; font-weight: 400; color: var(--text-2); font-size: 15px; }
.related a:hover { border-color: var(--primary); }

.disclaimer { font-size: 14px; color: var(--text-2); border-top: 1px solid var(--border-light); padding-top: 16px; margin-top: 32px; }

footer { color: rgba(255,255,255,0.8); font-size: 14px; text-align: center; padding: 20px 0 0; }
footer a { color: #fff; }
footer nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 18px; margin-bottom: 6px; }

@media (max-width: 600px) {
  .page { padding: 0 0 32px; }
  .sheet { border-radius: 0; box-shadow: none; }
  .bar { padding: 12px 16px; }
  .brand small { display: none; }
  .content { padding: 20px 16px 28px; }
  h1 { font-size: 27px; }
  .lede { font-size: 18px; }
  h2 { font-size: 22px; }
  footer { padding: 20px 16px 0; }
}
@media print {
  body { background: #fff; }
  .sheet { box-shadow: none; }
  .bar .btn, .cta, footer nav { display: none; }
}