/*
  cepti.app — one page, no dependencies, no outside requests.
  Meets WCAG 2.2 AA: 4.5:1 text contrast in both color schemes, visible focus,
  24px targets, reflow at 320px, no motion unless the visitor allows it.
  Colors match the add-on (src/overlay/tokens.ts).
*/

:root {
  --surface: #ffffff;
  --surface-alt: #f2f3f6;
  --text: #14161a;
  --text-muted: #4a4f57;
  --border: #7b818c;
  --accent: #4338ca;
  --on-accent: #ffffff;
  --ink: #101828;
  --on-ink: #ffffff;
  --sev-medium: #93370d;
  --success: #067647;
  --shadow: 0 18px 50px rgba(16, 24, 40, 0.16);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface: #16181d;
    --surface-alt: #23262e;
    --text: #f2f4f7;
    --text-muted: #c3c8d0;
    --border: #8b919c;
    --accent: #a5b4fc;
    --on-accent: #101828;
    --sev-medium: #fec84b;
    --success: #75e0a7;
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.5);
    color-scheme: dark;
  }
}

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

html { -webkit-text-size-adjust: 100%; scroll-padding-top: 80px; }

body {
  margin: 0;
  background: var(--surface);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img { display: block; }

a { color: var(--accent); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

.vh {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.wrap { width: min(1080px, 100% - 40px); margin-inline: auto; }

.skip {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 10;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--on-ink);
  font-weight: 700;
}
.skip:focus { top: 12px; }

/* ---- Header ---------------------------------------------------------------- */

.top { border-bottom: 1px solid var(--border); }
.top-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 14px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  color: var(--text);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.nav { display: flex; flex-wrap: wrap; gap: 4px 20px; }
.nav a {
  display: inline-block;
  padding: 8px 2px;
  color: var(--text);
  font-weight: 600;
}

/* ---- Hero ------------------------------------------------------------------ */

.hero { padding-block: 56px 64px; }
.hero-grid { display: grid; gap: 40px; align-items: center; }
@media (min-width: 900px) {
  .hero-grid { grid-template-columns: 1.05fr 1fr; gap: 56px; }
}

.kicker {
  color: var(--accent);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
h1 {
  margin-top: 10px;
  font-size: clamp(38px, 6.2vw, 62px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.04;
  text-wrap: balance;
}
.lead { margin-top: 18px; max-width: 34em; font-size: 20px; line-height: 1.5; }
.lead + .lead { margin-top: 10px; color: var(--text-muted); }

.pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.pills li {
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
}

.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 20px;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}
.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
}
.button:hover { text-decoration: underline; }
.fine { margin-top: 14px; max-width: 40em; color: var(--text-muted); font-size: 15px; }

/* ---- Working example ------------------------------------------------------- */

.demo {
  display: grid;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface-alt);
  box-shadow: var(--shadow);
}
.demo-label {
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.demo-page, .demo-card {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
}
/* The mock pop-up is a picture of someone else's page, so its colors are fixed. */
.demo-modal {
  margin-top: 10px;
  overflow: hidden;
  border-radius: 12px;
  background: #ffffff;
  color: #111111;
  text-align: center;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}
.demo-shout {
  padding: 16px 12px 2px;
  background: #ffe600;
  font-size: 26px;
  font-weight: 900;
  line-height: 1.1;
  text-transform: uppercase;
}
.demo-sub { padding: 0 12px 12px; background: #ffe600; color: #8a1c1c; font-size: 14px; font-weight: 700; }
.demo-yes {
  margin: 14px 16px 0;
  padding: 12px;
  border-radius: 8px;
  background: #116d32;
  color: #ffffff;
  font-weight: 800;
}
.demo-no-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 12px 16px;
}
.demo-no { color: #5b6470; font-size: 14px; text-decoration: underline; }
.demo-badge, .num {
  flex: none;
  display: inline-grid;
  place-items: center;
  min-width: 26px;
  height: 26px;
  padding: 0 6px;
  border: 2px solid #ffffff;
  border-radius: 999px;
  background: var(--ink);
  color: var(--on-ink);
  box-shadow: 0 0 0 1px var(--ink);
  font-size: 13px;
  font-weight: 800;
  line-height: 1;
}
.demo-card > * + * { margin-top: 8px; }
.demo-title { display: flex; align-items: center; gap: 8px; font-size: 18px; line-height: 1.3; }
.sev { color: var(--sev-medium); font-size: 15px; font-weight: 700; }
.demo-state { color: var(--success); font-weight: 800; }
.demo-card .button { width: 100%; margin-top: 12px; }
.demo figcaption { color: var(--text-muted); font-size: 14px; }

/* ---- Sections -------------------------------------------------------------- */

section { padding-block: 64px; }
.band { background: var(--surface-alt); border-block: 1px solid var(--border); }

h2 {
  font-size: clamp(27px, 3.6vw, 36px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  text-wrap: balance;
}
h3 { font-size: 19px; line-height: 1.3; }
.section-lead { margin-top: 12px; max-width: 38em; color: var(--text-muted); font-size: 19px; }

.steps { display: grid; gap: 16px; margin-top: 28px; counter-reset: step; }
@media (min-width: 760px) { .steps { grid-template-columns: repeat(3, 1fr); } }
.steps li {
  position: relative;
  padding: 22px 20px 20px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  counter-increment: step;
}
.steps li::before {
  content: counter(step);
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 10px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--on-ink);
  font-weight: 800;
}
@media (prefers-color-scheme: dark) {
  .steps li::before { border: 2px solid var(--border); }
}
.steps p { margin-top: 6px; color: var(--text-muted); }

.cards { display: grid; gap: 16px; margin-top: 28px; }
@media (min-width: 640px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 980px) { .cards { grid-template-columns: repeat(3, 1fr); } }
.cards li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-alt);
}
.cards p { color: var(--text-muted); }
.cards .fix { margin-top: auto; padding-top: 8px; color: var(--text); }

.two { display: grid; gap: 28px; align-items: start; }
@media (min-width: 860px) { .two { grid-template-columns: 1fr 1.15fr; gap: 56px; } }

.checks { display: grid; gap: 12px; }
.checks li {
  position: relative;
  padding: 14px 16px 14px 48px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
}
.checks li::before {
  content: "✓";
  position: absolute;
  left: 16px;
  top: 13px;
  color: var(--success);
  font-size: 20px;
  font-weight: 900;
  line-height: 1.4;
}

.roadmap { display: grid; gap: 14px; margin-top: 28px; }
@media (min-width: 760px) { .roadmap { grid-template-columns: repeat(2, 1fr); } }
.roadmap li {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
}
.roadmap li.now { border: 2px solid var(--accent); }
.roadmap p { margin-top: 6px; color: var(--text-muted); }
.tag {
  display: inline-block;
  margin-right: 6px;
  padding: 1px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  vertical-align: 2px;
}
.now .tag { border-color: var(--accent); background: var(--accent); color: var(--on-accent); }

/* ---- Footer ---------------------------------------------------------------- */

.foot { padding-block: 32px 44px; }
.foot-row { display: grid; gap: 10px; color: var(--text-muted); font-size: 15px; }
.foot strong { color: var(--text); }

/* ---- Preferences ----------------------------------------------------------- */

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
  .skip { transition: top 120ms ease-out; }
}

@media (forced-colors: active) {
  .button, .pills li, .tag, .demo-badge, .num, .steps li::before { border: 2px solid CanvasText; }
  .button.primary, .now .tag { border-color: Highlight; }
  .demo-modal, .demo-shout, .demo-sub, .demo-yes { forced-color-adjust: none; }
}