/* Transit Hunter — marketing site.
   One stylesheet for every page, so a second page costs no extra request.
   No web fonts: the system stack renders immediately and there is no
   render-blocking round trip to a font host. */

:root {
  --bg: #0a0e17;
  --bg-raised: #111725;
  --bg-sunken: #070b12;
  --border: #232c40;
  --border-strong: #33405c;
  --text: #e8edf7;
  --text-dim: #9aa7bd;
  --text-faint: #6b7789;
  --accent: #4da3ff;
  --accent-soft: rgba(77, 163, 255, 0.12);
  --good: #38d39f;
  --ok: #ffc857;
  --poor: #ff7a6b;
  --wrap: 1080px;
  --radius: 14px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  /* Belt and braces against horizontal scroll on small screens: any single
     over-wide child would otherwise widen the whole document. */
  overflow-x: hidden;
}

img, svg { max-width: 100%; height: auto; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: #7ebcff; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #0a0e17;
  padding: 10px 16px; border-radius: 0 0 8px 0; font-weight: 600; z-index: 100;
}
.skip:focus { left: 0; }

/* ---------- header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 16px;
  min-height: 62px; flex-wrap: wrap;
}
.brand {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 1.05rem; color: var(--text);
  text-decoration: none; margin-right: auto;
}
.brand:hover { color: var(--text); }
.brand-mark { font-size: 1.15rem; line-height: 1; }

.site-nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.site-nav a {
  color: var(--text-dim); text-decoration: none;
  padding: 7px 11px; border-radius: 8px; font-size: 0.94rem;
}
.site-nav a:hover { color: var(--text); background: var(--bg-raised); }
.site-nav a[aria-current="page"] { color: var(--text); background: var(--bg-raised); }

/* `.site-nav a` is (0,1,1) and `.btn-primary` only (0,1,0), so without these
   the nav's dim link colour wins and the header CTA renders blue-grey on
   blue — text that is technically present and effectively unreadable. */
.site-nav a.btn-primary { color: #061018; }
.site-nav a.btn-primary:hover { color: #061018; background: #6fb5ff; }
.site-nav a.btn-ghost { color: var(--text); }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border-radius: 10px;
  font-weight: 600; font-size: 0.97rem; text-decoration: none;
  border: 1px solid transparent; cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn-primary { background: var(--accent); color: #061018; }
.btn-primary:hover { background: #6fb5ff; color: #061018; }
.btn-ghost { border-color: var(--border-strong); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--text); background: var(--accent-soft); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- sections ---------- */

section { padding: 72px 0; border-top: 1px solid var(--border); }
section:first-of-type { border-top: 0; }

.eyebrow {
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.09em;
  text-transform: uppercase; color: var(--accent); margin: 0 0 12px;
}
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 16px; }
h1 { font-size: clamp(2rem, 5.2vw, 3.15rem); font-weight: 700; }
h2 { font-size: clamp(1.55rem, 3.6vw, 2.15rem); font-weight: 700; }
h3 { font-size: 1.09rem; font-weight: 650; letter-spacing: -0.01em; }
.lede { font-size: clamp(1.02rem, 2vw, 1.16rem); color: var(--text-dim); max-width: 68ch; }
.section-intro { max-width: 70ch; margin-bottom: 40px; }
p { margin: 0 0 16px; }
p:last-child { margin-bottom: 0; }

/* ---------- hero ---------- */

.hero { padding: 84px 0 72px; }
.hero h1 { max-width: 20ch; }
.hero .lede { margin-bottom: 28px; }
.hero .btn-row { margin-bottom: 14px; }
.hero-note { font-size: 0.9rem; color: var(--text-faint); margin: 0; }

/* ---------- cards ---------- */

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(258px, 1fr)); }

.card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.card h3 { margin-bottom: 8px; }
.card p { color: var(--text-dim); font-size: 0.96rem; margin: 0; }
.card-icon { font-size: 1.35rem; line-height: 1; display: block; margin-bottom: 12px; }

/* ---------- steps ---------- */

.steps { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.step {
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px; position: relative;
}
.step-num {
  font-family: var(--mono); font-size: 0.8rem; font-weight: 600;
  color: var(--accent); display: block; margin-bottom: 10px;
}
.step h3 { margin-bottom: 8px; }
.step p { color: var(--text-dim); font-size: 0.96rem; margin: 0; }

/* ---------- stats ---------- */

.stats { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
.stat {
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px;
}
.stat-value {
  font-family: var(--mono); font-size: 1.75rem; font-weight: 600;
  color: var(--text); display: block; line-height: 1.1; margin-bottom: 8px;
}
.stat-label { font-size: 0.88rem; color: var(--text-dim); }

/* ---------- factor table ---------- */

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid var(--border); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; min-width: 460px; font-size: 0.95rem; }
caption { text-align: left; color: var(--text-faint); font-size: 0.88rem; padding: 0 0 12px; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--border); }
thead th { background: var(--bg-sunken); color: var(--text-dim); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600; }
tbody tr:last-child td { border-bottom: 0; }
td.num { font-family: var(--mono); color: var(--accent); text-align: right; width: 1%; white-space: nowrap; }
td.yes { color: var(--good); }
td.no { color: var(--text-faint); }

/* ---------- callout ---------- */

.callout {
  background: var(--bg-raised); border: 1px solid var(--border-strong);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 20px 22px; margin: 28px 0 0;
}
.callout p { color: var(--text-dim); font-size: 0.96rem; }
.callout strong { color: var(--text); }

.safety {
  background: rgba(255, 122, 107, 0.07);
  border: 1px solid rgba(255, 122, 107, 0.3);
  border-left: 3px solid var(--poor);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 20px 22px;
}
.safety h3 { color: var(--poor); }
.safety p { color: var(--text-dim); font-size: 0.94rem; }

/* ---------- checklist ---------- */

.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.checks li { padding-left: 28px; position: relative; color: var(--text-dim); font-size: 0.97rem; }
.checks li::before {
  content: "\2713"; position: absolute; left: 0; top: 0;
  color: var(--good); font-weight: 700;
}
.checks strong { color: var(--text); font-weight: 600; }

/* ---------- diagram ---------- */

.figure { margin: 0; }
.figure svg { display: block; width: 100%; height: auto; background: var(--bg-sunken); border: 1px solid var(--border); border-radius: var(--radius); }
figcaption { color: var(--text-faint); font-size: 0.87rem; margin-top: 12px; }

/* ---------- faq ---------- */

.faq { display: grid; gap: 12px; }
.faq details {
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0;
}
.faq summary {
  cursor: pointer; padding: 18px 22px; font-weight: 600;
  list-style: none; display: flex; justify-content: space-between; gap: 16px; align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 1.3rem; font-weight: 400; line-height: 1; flex: none; }
.faq details[open] summary::after { content: "\2212"; }
.faq details > p { padding: 0 22px 18px; color: var(--text-dim); font-size: 0.96rem; margin: 0; }

/* ---------- cta ---------- */

.cta { text-align: center; }
.cta .lede { margin: 0 auto 28px; }
.cta .btn-row { justify-content: center; }

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-sunken);
  padding: 56px 0 40px;
  font-size: 0.93rem;
}
.footer-cols {
  display: grid; gap: 32px;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  margin-bottom: 36px;
}
.footer-cols h2 {
  font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--text-faint); font-weight: 700; margin: 0 0 14px;
}
.footer-cols ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 9px; }
.footer-cols a { color: var(--text-dim); text-decoration: none; }
.footer-cols a:hover { color: var(--accent); text-decoration: underline; }
.footer-cols address { font-style: normal; color: var(--text-dim); line-height: 1.6; }
.footer-legal {
  border-top: 1px solid var(--border);
  padding-top: 24px; color: var(--text-faint); font-size: 0.87rem;
  display: grid; gap: 8px;
}

/* ---------- 404 ---------- */

.notfound { padding: 100px 0; text-align: center; }
.notfound .code { font-family: var(--mono); font-size: 3.4rem; color: var(--accent); margin: 0 0 8px; line-height: 1; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  section { padding: 56px 0; }
  .hero { padding: 56px 0 52px; }
  .site-header .wrap { min-height: 56px; padding-top: 8px; padding-bottom: 8px; }
  .site-nav { gap: 0; }
  .site-nav a { padding: 6px 8px; font-size: 0.88rem; }
  /* Only the in-page button rows go full width. Scoping this to .btn-row
     matters: the header CTA is a .btn too, and stretching it turns a sticky
     header into a 250px band that eats a third of the phone viewport. */
  .btn-row { flex-direction: column; }
  .btn-row .btn { width: 100%; }
  /* width:auto is explicit, not defensive: the nav is a wrapping flex
     container and the CTA lands on a line of its own, where anything but an
     explicit auto leaves it spanning the full width and turns the sticky
     header into a band a third of the viewport tall. */
  .site-nav .btn { width: auto; padding: 7px 14px; font-size: 0.88rem; }
}