/* GudTrack — clean, product-page style. System font stack (SF on Apple devices), no external assets. */
:root {
  --bg: #ffffff;
  --bg-alt: #f5f5f7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --text-2: #6e6e73;
  --text-3: #86868b;
  --line: rgba(0, 0, 0, 0.08);
  --link: #0066cc;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --accent-ink: #ffffff;
  --ok: #1d8a3a;
  --ok-soft: rgba(52, 199, 89, 0.12);
  --err: #d70015;
  --err-soft: rgba(255, 59, 48, 0.10);
  --warn: #b25000;
  --warn-soft: rgba(255, 149, 0, 0.12);
  --nav-bg: rgba(251, 251, 253, 0.8);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
  --radius-lg: 28px;
  --radius: 18px;
  --radius-sm: 12px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --bg-alt: #161617;
    --surface: #1d1d1f;
    --text: #f5f5f7;
    --text-2: #a1a1a6;
    --text-3: #86868b;
    --line: rgba(255, 255, 255, 0.12);
    --link: #2997ff;
    --accent: #0071e3;
    --accent-hover: #0077ed;
    --ok: #30d158;
    --ok-soft: rgba(48, 209, 88, 0.16);
    --err: #ff453a;
    --err-soft: rgba(255, 69, 58, 0.16);
    --warn: #ffb340;
    --warn-soft: rgba(255, 159, 10, 0.16);
    --nav-bg: rgba(22, 22, 23, 0.8);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.022em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { display: block; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.container { max-width: 980px; margin: 0 auto; padding: 0 22px; }
.container.narrow { max-width: 692px; }

/* ── Navigation ─────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: var(--nav-bg);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}
.nav .container { display: flex; align-items: center; justify-content: space-between; height: 52px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 8px; color: var(--text); font-weight: 600; font-size: 19px; letter-spacing: -0.02em; }
.brand:hover { text-decoration: none; }
.brand svg { width: 24px; height: 24px; color: var(--accent); }
.nav nav { display: flex; gap: 28px; }
.nav nav a { color: var(--text); opacity: 0.8; font-size: 13px; letter-spacing: -0.01em; }
.nav nav a:hover { opacity: 1; text-decoration: none; }
.nav nav a[aria-current="page"] { opacity: 1; font-weight: 500; }

/* ── Type ───────────────────────────────────────────────── */
.eyebrow { font-size: 21px; font-weight: 600; letter-spacing: 0.011em; color: var(--accent); margin: 0 0 8px; }
.headline { font-size: 64px; line-height: 1.0625; font-weight: 700; letter-spacing: -0.015em; margin: 0; }
.headline-2 { font-size: 48px; line-height: 1.08; font-weight: 700; letter-spacing: -0.003em; margin: 0; }
.subhead { font-size: 24px; line-height: 1.33; font-weight: 400; letter-spacing: 0.009em; color: var(--text-2); margin: 18px auto 0; max-width: 640px; }
.center { text-align: center; }
.muted { color: var(--text-2); }

/* ── Buttons & links ────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 22px; border: 0; border-radius: 980px;
  background: var(--accent); color: var(--accent-ink);
  font: inherit; font-size: 17px; font-weight: 400; letter-spacing: -0.022em;
  cursor: pointer; transition: background-color .2s ease, opacity .2s ease;
}
.btn:hover { background: var(--accent-hover); text-decoration: none; }
.btn:disabled { opacity: .5; cursor: default; }
.link-more { font-size: 17px; }
.link-more::after { content: " \203A"; }
.cta { display: flex; gap: 24px; align-items: center; justify-content: center; flex-wrap: wrap; margin-top: 32px; }

/* ── Sections ───────────────────────────────────────────── */
.hero { padding: 96px 0 88px; text-align: center; }
.hero.compact { padding: 72px 0 40px; }
.section { padding: 96px 0; }
.section.alt { background: var(--bg-alt); }
.section-head { text-align: center; margin-bottom: 56px; }

/* Hero visual: a sample status card */
.hero-visual { margin: 64px auto 0; max-width: 560px; text-align: left; }

/* ── Tiles ──────────────────────────────────────────────── */
.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.tile { background: var(--surface); border-radius: var(--radius-lg); padding: 40px 32px; }
.section.alt .tile { background: var(--surface); }
.tile .icon { width: 44px; height: 44px; color: var(--accent); margin-bottom: 20px; }
.tile h3 { font-size: 24px; line-height: 1.17; font-weight: 600; letter-spacing: 0.009em; margin: 0 0 10px; }
.tile p { margin: 0; color: var(--text-2); }

/* ── Steps ──────────────────────────────────────────────── */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; counter-reset: step; }
.step { text-align: center; }
.step .num {
  width: 48px; height: 48px; margin: 0 auto 18px; border-radius: 50%;
  display: grid; place-items: center; font-size: 21px; font-weight: 600;
  background: var(--bg-alt); color: var(--text);
}
.section.alt .step .num { background: var(--surface); }
.step h3 { font-size: 21px; font-weight: 600; margin: 0 0 6px; letter-spacing: 0.011em; }
.step p { margin: 0; color: var(--text-2); }

/* ── Statement block ────────────────────────────────────── */
.statement { text-align: center; max-width: 760px; margin: 0 auto; }
.statement .points { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px 28px; margin: 32px 0 0; padding: 0; list-style: none; color: var(--text-2); }
.statement .points li::before { content: "\2713"; color: var(--ok); font-weight: 600; margin-right: 8px; }

/* ── Notes ──────────────────────────────────────────────── */
.footnote { font-size: 12px; line-height: 1.33; color: var(--text-3); letter-spacing: -0.01em; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 980px; font-size: 14px; letter-spacing: -0.016em;
  background: var(--warn-soft); color: var(--warn);
}
.badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }

/* ── Lookup ─────────────────────────────────────────────── */
form.lookup {
  display: flex; gap: 10px; max-width: 620px; margin: 36px auto 0;
  padding: 8px; background: var(--bg-alt); border-radius: 980px; border: 1px solid var(--line);
}
form.lookup input {
  flex: 1 1 auto; min-width: 0; border: 0; background: transparent; color: var(--text);
  font: 400 19px/1.2 var(--mono); letter-spacing: 0.04em; text-transform: uppercase;
  padding: 0 18px; height: 48px; outline: none;
}
form.lookup input::placeholder { color: var(--text-3); letter-spacing: 0.04em; }
form.lookup:focus-within { border-color: var(--accent); box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.18); }
form.lookup .btn { min-height: 48px; padding: 0 26px; }

.samples { max-width: 720px; margin: 24px auto 0; text-align: center; }
.samples .label { display: block; font-size: 14px; color: var(--text-2); margin-bottom: 10px; }
.chip {
  display: inline-block; margin: 4px; padding: 7px 14px; border-radius: 980px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text);
  font: 14px var(--mono); letter-spacing: 0; cursor: pointer; transition: border-color .2s, background-color .2s;
}
.chip:hover { border-color: var(--accent); }
.chip small { font-family: var(--font); color: var(--text-2); margin-left: 6px; }

/* ── Result card ────────────────────────────────────────── */
.result { max-width: 640px; margin: 48px auto 0; }
.result:empty { display: none; }
.card {
  background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow);
  border: 1px solid var(--line); padding: 32px; text-align: left;
}
.card .state { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; padding: 5px 12px; border-radius: 980px; }
.card.ok .state { background: var(--ok-soft); color: var(--ok); }
.card.err .state { background: var(--err-soft); color: var(--err); }
.card h2 { font-size: 32px; line-height: 1.125; font-weight: 700; letter-spacing: 0.004em; margin: 16px 0 10px; }
.card p { margin: 0 0 10px; color: var(--text-2); }
.card dl { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 24px; margin: 24px 0 0; padding-top: 24px; border-top: 1px solid var(--line); }
.card dt { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-3); }
.card dd { margin: 2px 0 0; font-size: 17px; }
.card dd.mono { font-family: var(--mono); letter-spacing: 0.02em; }
.card .loading { color: var(--text-2); margin: 0; }

.history { margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--line); }
.history h3 { font-size: 17px; font-weight: 600; margin: 0 0 16px; }
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li { position: relative; padding: 0 0 20px 28px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before { content: ""; position: absolute; left: 4px; top: 8px; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); }
.timeline li::after { content: ""; position: absolute; left: 8px; top: 22px; bottom: 2px; width: 2px; background: var(--line); }
.timeline li:last-child::after { display: none; }
.timeline time { display: block; font-size: 14px; color: var(--text-3); }

/* ── Legal pages ────────────────────────────────────────── */
.legal { padding: 72px 0 96px; }
.legal header { margin-bottom: 48px; }
.legal .headline-2 { font-size: 48px; }
.legal .effective { color: var(--text-2); margin-top: 10px; }
.legal h2 { font-size: 24px; line-height: 1.17; font-weight: 600; margin: 48px 0 12px; letter-spacing: 0.009em; }
.legal h3 { font-size: 19px; font-weight: 600; margin: 24px 0 8px; }
.legal p, .legal li { color: var(--text); }
.legal ul { padding-left: 22px; }
.legal li { margin: 8px 0; }
.legal .callout { margin-top: 48px; padding: 20px 24px; border-radius: var(--radius-sm); background: var(--bg-alt); color: var(--text-2); font-size: 15px; }

/* ── Footer ─────────────────────────────────────────────── */
.footer { background: var(--bg-alt); color: var(--text-3); font-size: 12px; line-height: 1.33; letter-spacing: -0.01em; padding: 20px 0 32px; }
.footer .container > * { margin: 0; }
.footer .disclaimer { padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.footer .bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; padding-top: 14px; }
.footer .links { display: flex; flex-wrap: wrap; gap: 0; }
.footer .links a { color: var(--text-2); padding: 0 10px; border-left: 1px solid var(--line); }
.footer .links a:first-child { padding-left: 0; border-left: 0; }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 834px) {
  .headline { font-size: 48px; }
  .headline-2, .legal .headline-2 { font-size: 40px; }
  .subhead { font-size: 21px; }
  .tiles, .steps { grid-template-columns: 1fr; }
  .hero { padding: 72px 0 64px; }
  .section { padding: 72px 0; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .container { padding: 0 16px; }
  .nav nav { gap: 16px; }
  .brand span.name { display: inline; }
  .headline { font-size: 38px; }
  .headline-2, .legal .headline-2 { font-size: 32px; }
  .eyebrow { font-size: 17px; }
  .subhead { font-size: 19px; }
  .tile { padding: 32px 24px; }
  form.lookup { flex-direction: column; border-radius: var(--radius); padding: 10px; }
  form.lookup input { height: 44px; text-align: center; }
  form.lookup .btn { width: 100%; }
  .card { padding: 24px; }
  .card h2 { font-size: 26px; }
  .card dl { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}