/* IRBGPT — irbgpt.com
   Static site, no frameworks, no external requests (fonts/CDNs) by design. */

:root {
  --ink: #1a2332;
  --ink-soft: #43506b;
  --ink-mute: #6b7590;
  --paper: #fbfaf7;
  --paper-alt: #f1efe9;
  --line: #ddd8cc;
  --accent: #0e5f63;
  --accent-dark: #0a4649;
  --ok: #2e7d4f;
  --warn: #b07500;
  --bad: #b03030;
  --mono: ui-monospace, "Cascadia Code", Consolas, Menlo, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 17px;
}

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

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent-dark); }

h1, h2, h3, h4 { line-height: 1.2; letter-spacing: -0.01em; }
h2 { font-size: 2rem; margin-bottom: 0.35rem; }
h3 { font-size: 1.15rem; }

p + p { margin-top: 0.9em; }

code {
  font-family: var(--mono);
  font-size: 0.85em;
  color: var(--accent-dark);
}

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251, 250, 247, 0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { font-weight: 800; font-size: 1.25rem; text-decoration: none; color: var(--ink); letter-spacing: -0.02em; }
.brand span { color: var(--accent); }
.site-nav { display: flex; align-items: center; gap: 22px; }
.site-nav a { text-decoration: none; color: var(--ink-soft); font-size: 0.95rem; }
.site-nav a:hover { color: var(--accent-dark); }

/* Buttons */
.btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; }
.btn-ghost { border-color: var(--line); color: var(--ink-soft); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-dark); }
.btn-small { padding: 7px 16px; background: var(--accent); color: #fff !important; border-radius: 6px; font-size: 0.9rem; }
.btn-small:hover { background: var(--accent-dark); }

/* Hero */
.hero { padding: 72px 0 40px; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 48px; align-items: center; }
.eyebrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-dark);
  margin-bottom: 14px;
}
.hero h1 { font-size: 4rem; letter-spacing: -0.03em; }
.subtitle { font-size: 1.3rem; color: var(--ink-soft); margin: 4px 0 18px; }
.lede { font-size: 1.08rem; color: var(--ink-soft); max-width: 34em; }
.hero-actions { margin-top: 28px; display: flex; gap: 14px; flex-wrap: wrap; }

/* Terminal mockup */
.terminal {
  background: #10151f;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 18px 40px rgba(16, 21, 31, 0.25);
  font-family: var(--mono);
}
.terminal-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 10px 14px;
  background: #1a2130;
}
.terminal-bar span { width: 11px; height: 11px; border-radius: 50%; background: #3a445c; }
.terminal-bar em { font-style: normal; color: #7d8aa8; font-size: 0.75rem; margin-left: 8px; }
.terminal pre {
  padding: 18px 20px 22px;
  color: #aeb8cf;
  font-size: 0.82rem;
  line-height: 1.9;
  overflow-x: auto;
}
.terminal b { font-weight: 500; }
.terminal .ok { color: #5fd39a; }
.terminal .warn { color: #e8b34b; }

/* Stats */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  margin-top: 54px; padding-bottom: 8px;
}
.stats div { border-left: 3px solid var(--accent); padding-left: 14px; }
.stats strong { display: block; font-size: 1.5rem; letter-spacing: -0.02em; }
.stats span { color: var(--ink-mute); font-size: 0.88rem; }

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: var(--paper-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-lede { font-size: 1.2rem; color: var(--accent-dark); font-weight: 600; margin-bottom: 1em; }
.footnote { color: var(--ink-mute); font-size: 0.88rem; margin-top: 1.2em; }
h3.sub { margin: 1.8em 0 0.6em; }

/* Cards */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 34px; }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}
.card h3 { margin-bottom: 8px; color: var(--accent-dark); }
.card p { font-size: 0.94rem; color: var(--ink-soft); }

/* Exemption grid */
.exempt-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 30px; }
.exempt { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 18px; }
.exempt code { display: block; margin-bottom: 8px; font-size: 0.8rem; }
.exempt h3 { font-size: 0.98rem; margin-bottom: 6px; }
.exempt p { font-size: 0.85rem; color: var(--ink-mute); }

/* Belmont */
.belmont-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 32px; }
.belmont { border-top: 3px solid var(--accent); padding-top: 16px; }
.numeral { font-family: var(--mono); font-size: 1.6rem; color: var(--accent); display: block; margin-bottom: 6px; }
.belmont h3 { margin-bottom: 8px; }
.belmont p { font-size: 0.94rem; color: var(--ink-soft); }

/* Disclaimer */
.disclaimer {
  margin-top: 48px;
  background: #fff8ec;
  border: 1px solid #e8d9b5;
  border-left: 4px solid var(--warn);
  border-radius: 6px;
  padding: 20px 24px;
}
.disclaimer h3 { color: #7a5200; margin-bottom: 8px; }
.disclaimer p { font-size: 0.95rem; }

/* Who list */
.who-list { list-style: none; margin-top: 8px; }
.who-list li { padding: 10px 0 10px 22px; border-bottom: 1px solid var(--line); position: relative; }
.who-list li::before { content: "→"; position: absolute; left: 0; color: var(--accent); }

/* Coverage */
.coverage-list { margin-top: 30px; display: grid; gap: 14px; }
.coverage {
  display: grid; grid-template-columns: 84px 1fr; gap: 18px;
  background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 18px 20px;
  align-items: start;
}
.coverage > code {
  font-size: 0.85rem; font-weight: 700; color: var(--accent-dark);
  background: var(--paper-alt); border-radius: 5px; padding: 6px 0; text-align: center;
}
.coverage h3 { font-size: 1.02rem; margin-bottom: 4px; }
.coverage p { font-size: 0.9rem; color: var(--ink-soft); }

/* Sample output */
.sample { margin-top: 40px; background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 26px; }
.sample-title { font-family: var(--mono); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-mute); }
.sample-study { font-size: 1.1rem; font-weight: 600; margin: 8px 0 18px; }
.finding { display: grid; grid-template-columns: 34px 1fr; gap: 12px; padding: 14px 0; border-top: 1px solid var(--line); }
.finding span { font-size: 1.1rem; text-align: center; }
.finding.ok span { color: var(--ok); }
.finding.warn span { color: var(--warn); }
.finding.bad span { color: var(--bad); }
.finding h4 { margin-bottom: 4px; }
.finding p { font-size: 0.92rem; color: var(--ink-soft); }

/* CTA */
.cta { text-align: center; margin-top: 56px; }
.cta h3 { font-size: 1.5rem; margin-bottom: 8px; }
.cta p { max-width: 40em; margin: 0 auto 22px; color: var(--ink-soft); }

/* Footer */
.site-footer { background: var(--ink); color: #b9c2d8; padding: 56px 0 28px; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
.site-footer h3 { color: #fff; font-size: 1rem; margin-bottom: 12px; }
.site-footer p { font-size: 0.9rem; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 8px; font-size: 0.9rem; }
.site-footer a { color: #8fd4d8; }
.site-footer a:hover { color: #fff; }
.site-footer .footnote { color: #7d8aa8; }
.footer-legal { border-top: 1px solid #2a3346; margin-top: 40px; padding-top: 22px; }
.footer-legal p { font-size: 0.82rem; color: #7d8aa8; }

/* Brand group */
.brand-group { display: flex; flex-direction: column; line-height: 1.15; }
.brand-org {
  font-size: 0.68rem;
  font-family: var(--mono);
  color: var(--ink-mute);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.brand-org:hover { color: var(--accent-dark); }
.eyebrow a { color: var(--accent-dark); }

/* Exemption screener */
.screener {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 30px;
  margin-top: 28px;
  max-width: 46em;
}
.screener-question { font-size: 1.15rem; font-weight: 600; margin-bottom: 18px; }
.screener-options { display: flex; flex-direction: column; gap: 10px; }
.screener-btn {
  font: inherit;
  text-align: left;
  padding: 12px 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 7px;
  cursor: pointer;
  color: var(--ink);
  transition: border-color 0.15s, background 0.15s;
}
.screener-btn:hover { border-color: var(--accent); background: #fff; color: var(--accent-dark); }
.screener-result { border-radius: 7px; padding: 18px 22px; }
.screener-result.ok { background: #eef7f0; border: 1px solid #bcdcc6; border-left: 4px solid var(--ok); }
.screener-result.warn { background: #fff8ec; border: 1px solid #e8d9b5; border-left: 4px solid var(--warn); }
.screener-result h4 { margin-bottom: 8px; }
.screener-result p { font-size: 0.95rem; }
.screener-note { color: var(--ink-mute); font-size: 0.85rem !important; margin-top: 10px; }
.screener-nav { margin-top: 16px; display: flex; gap: 18px; }
.screener-link {
  font: inherit; font-size: 0.88rem;
  background: none; border: none; padding: 0;
  color: var(--accent); cursor: pointer;
  text-decoration: underline; text-underline-offset: 2px;
}
.screener-link:hover { color: var(--accent-dark); }

/* Consent quick-check */
.consent-check {
  margin-top: 48px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 28px;
}
.consent-check > p { font-size: 0.95rem; color: var(--ink-soft); }
.consent-check h3.sub { margin-top: 0; }
.consent-meter {
  height: 8px; border-radius: 4px;
  background: var(--paper-alt);
  border: 1px solid var(--line);
  margin: 16px 0 6px;
  overflow: hidden;
}
.consent-meter span { display: block; height: 100%; width: 0; background: var(--bad); transition: width 0.3s, background 0.3s; }
.consent-meter.mid span { background: var(--warn); }
.consent-meter.full span { background: var(--ok); }
.consent-count { font-family: var(--mono); font-size: 0.8rem; color: var(--ink-mute); margin-bottom: 14px; }
.consent-list { list-style: none; columns: 2; column-gap: 32px; }
.consent-list li { break-inside: avoid; padding: 7px 0; font-size: 0.92rem; }
.consent-list label { display: flex; gap: 10px; align-items: flex-start; cursor: pointer; }
.consent-list input { margin-top: 4px; accent-color: var(--accent); }

/* Responsive */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero h1 { font-size: 3rem; }
  .card-grid, .belmont-grid { grid-template-columns: 1fr 1fr; }
  .exempt-grid { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 560px) {
  .card-grid, .belmont-grid, .exempt-grid { grid-template-columns: 1fr; }
  .consent-list { columns: 1; }
  .brand-org { display: none; }
  .site-nav a:not(.btn-small) { display: none; }
  .hero { padding-top: 48px; }
  .hero h1 { font-size: 2.5rem; }
  .coverage { grid-template-columns: 64px 1fr; }
}