/* Shared stylesheet for the pSEO pages (tools/pseo). Mobile-first.
   The build copies this file to public/_assets/css/pseo.<hash>.css — edit
   this source, never the hashed copy. */

/* 1. Font --------------------------------------------------------------- */

/* Host Grotesk, latin subset: the file the main site already ships. It is a
   variable font, so one file covers every weight used here. "optional" means
   no late swap and so no layout shift; the font is preloaded, so it almost
   always arrives in time. */
@font-face {
  font-family: "Host Grotesk";
  font-style: normal;
  font-weight: 400 700;
  font-display: optional;
  src: url(/_assets/gfonts/co3BmWBnlCJ3U42vbbfdwMjZpFjm.woff2) format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* 2. Tokens ------------------------------------------------------------- */

:root {
  color-scheme: dark;

  --bg: #131517;
  --surface: #1b1d20;
  --surface-2: #232326;
  --border: rgb(255 255 255 / 0.1);
  --border-strong: rgb(255 255 255 / 0.22);
  --text: #fff;
  --muted: rgb(255 255 255 / 0.72);
  --accent: #d4b144;
  --accent-ink: #131517;

  --font: "Host Grotesk", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-h3: 1.25rem;
  --fs-h2: clamp(1.875rem, 1.3rem + 2.6vw, 3rem);
  --fs-h1: clamp(2.5rem, 1.6rem + 4.6vw, 4.75rem);

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;

  --radius: 1.25rem;
  --radius-pill: 999px;
  --container: 70rem;
}

/* 3. Base --------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: var(--fs-base);
  line-height: 1.6;
}

h1, h2, h3 { margin: 0; line-height: 1.08; font-weight: 700; text-wrap: balance; }
p { margin: 0; }
img { display: block; max-width: 100%; height: auto; }
/* :where() keeps this at zero specificity so component margins (.cards etc.) win. */
:where(ul[role="list"], ol[role="list"]) { list-style: none; margin: 0; padding: 0; }

a { color: inherit; text-underline-offset: 0.2em; }
a:hover { color: var(--accent); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: var(--accent); color: var(--accent-ink); }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* 4. Layout ------------------------------------------------------------- */

.container {
  width: min(var(--container), 100% - 2rem);
  margin-inline: auto;
}

main > section { padding-block: var(--space-5); }
main > section + section { border-top: 1px solid var(--border); }

/* 5. Components --------------------------------------------------------- */

.visually-hidden,
.skip-link:not(:focus) {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  top: var(--space-1);
  left: var(--space-1);
  z-index: 10;
  padding: var(--space-1) var(--space-2);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  border-radius: var(--radius-pill);
}

/* Header */
.site-header { border-bottom: 1px solid var(--border); }
.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  min-height: 4.5rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.logo img { width: 2rem; height: 2rem; border-radius: 0.5rem; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
  text-decoration: none;
  transition: background-color 0.15s, border-color 0.15s;
}
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: #e2c25c; color: var(--accent-ink); }
.btn-secondary { border: 1px solid var(--border-strong); color: var(--text); }
.btn-secondary:hover { border-color: var(--accent); color: var(--text); }
.btn-small { min-height: 2.5rem; padding: 0.5rem 1.125rem; font-size: var(--fs-sm); }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: var(--space-4);
}

/* Breadcrumb */
.breadcrumb { padding-top: var(--space-3); font-size: var(--fs-sm); color: var(--muted); }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: var(--space-1); margin: 0; padding: 0; list-style: none; }
.breadcrumb li + li::before { content: "/"; margin-right: var(--space-1); opacity: 0.6; }
.breadcrumb a { text-decoration: none; }
.breadcrumb [aria-current="page"] { color: var(--text); }

/* Section headings */
.eyebrow {
  margin-bottom: 0.875rem;
  color: var(--accent);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
h2 { font-size: var(--fs-h2); letter-spacing: -0.03em; }
.intro { max-width: 40rem; margin-top: var(--space-2); color: var(--muted); font-size: var(--fs-lg); }

/* Hero */
main > .hero { padding-block: var(--space-4) var(--space-5); text-align: center; border-top: 0; }
.hero h1 { max-width: 16ch; margin-inline: auto; font-size: var(--fs-h1); letter-spacing: -0.04em; line-height: 1; }
.hero .lede { max-width: 38rem; margin: var(--space-3) auto 0; color: var(--muted); font-size: var(--fs-lg); }
.hero .actions { justify-content: center; }

/* Cards */
.cards {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-4);
}
.card {
  padding: var(--space-3);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.card-index { color: var(--accent); font-size: var(--fs-sm); font-weight: 700; }
.card h3 { margin: var(--space-4) 0 0.75rem; font-size: var(--fs-h3); }
.card > p:not(.card-index) { color: var(--muted); }

.chips { display: flex; flex-wrap: wrap; gap: var(--space-1); margin-top: var(--space-2); }
.chips li {
  padding: 0.25rem 0.75rem;
  background: var(--surface-2);
  border-radius: var(--radius-pill);
  font-size: var(--fs-sm);
  color: var(--muted);
}

/* Sample questions */
.mcqs { display: grid; gap: var(--space-2); margin-top: var(--space-4); }
.mcq {
  padding: var(--space-3);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.mcq-meta { color: var(--accent); font-size: var(--fs-sm); font-weight: 700; }
.mcq-stem { margin-top: var(--space-1); font-size: var(--fs-lg); font-weight: 500; }
.mcq-options { margin: var(--space-2) 0 0; padding-left: 1.5rem; color: var(--muted); }
.mcq-options li + li { margin-top: 0.25rem; }
.mcq .disclosure { margin-top: var(--space-2); }

/* Question bank: subject groups are native <details>, first one open. */
.qb-summary { margin-top: var(--space-2); color: var(--muted); }
.qb-index { margin-top: var(--space-3); }
.qb-index a { text-decoration: none; }
.qb-index span { margin-left: 0.25rem; color: var(--accent); font-weight: 700; }
.qb-groups { display: grid; gap: var(--space-2); margin-top: var(--space-4); }
.qgroup { border: 1px solid var(--border); border-radius: var(--radius); scroll-margin-top: var(--space-2); }
.qgroup > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem var(--space-2);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  list-style: none;
}
.qgroup > summary::-webkit-details-marker { display: none; }
.qgroup > summary h3 { font-size: var(--fs-h3); }
.qgroup > summary h3::before { content: "+"; display: inline-block; width: 1.25rem; color: var(--accent); }
.qgroup[open] > summary h3::before { content: "−"; }
.qgroup-count { color: var(--muted); font-size: var(--fs-sm); }
.qgroup > .mcqs { margin: 0; padding: 0 var(--space-1) var(--space-1); }
/* Source text includes long run-together words; never let one widen the page. */
.mcq { scroll-margin-top: var(--space-2); overflow-wrap: anywhere; }
.mcq-stem, .mcq-explanation { white-space: pre-line; }
.qb-cta {
  margin-top: var(--space-4);
  padding: var(--space-3);
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  text-align: center;
}
.qb-groups .qb-cta { margin-top: 0; }
.qb-cta-title { color: var(--text); font-size: var(--fs-h3); font-weight: 700; }
.qb-cta p + p { margin-top: 0.25rem; color: var(--muted); }
.qb-cta .actions { justify-content: center; margin-top: var(--space-3); }

/* Disclosure: shared by MCQ answers and the FAQ. Native <details>, no JS. */
.disclosure {
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 0.6);
  background: var(--surface);
}
.disclosure summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}
.disclosure summary::-webkit-details-marker { display: none; }
.disclosure summary::after {
  content: "+";
  flex: none;
  color: var(--accent);
  font-size: 1.5rem;
  line-height: 1;
}
.disclosure[open] summary::after { content: "−"; }
.disclosure-body { padding: 0 var(--space-3) var(--space-2); color: var(--muted); }
.disclosure-body p + p { margin-top: var(--space-1); }
.disclosure-body strong { color: var(--text); }
.mcq .disclosure { background: var(--surface-2); }

.faq { display: grid; gap: 0.75rem; max-width: 48rem; margin-top: var(--space-4); }

/* Exam facts */
.table-wrap { margin-top: var(--space-4); overflow-x: auto; }
.facts { width: 100%; max-width: 48rem; border-collapse: collapse; }
.facts th, .facts td { padding: 0.875rem var(--space-2); text-align: left; border-bottom: 1px solid var(--border); }
.facts th { width: 40%; font-weight: 500; color: var(--muted); }

/* Related exams */
.link-grid { display: grid; gap: 0.75rem; margin-top: var(--space-4); }
.link-grid a {
  display: flex;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 0.6);
  font-weight: 700;
  text-decoration: none;
}
.link-grid a:hover { border-color: var(--accent); }

/* Closing CTA */
.cta { text-align: center; }
.cta .intro { margin-inline: auto; }
.cta .actions { justify-content: center; }

/* Footer */
.site-footer { padding-block: var(--space-4); border-top: 1px solid var(--border); color: var(--muted); font-size: var(--fs-sm); }
.site-footer-inner { display: grid; gap: var(--space-3); }
.site-footer ul { display: flex; flex-wrap: wrap; gap: var(--space-1) var(--space-3); }
.site-footer a { text-decoration: none; }
.logo-footer { color: var(--text); font-size: 1.125rem; }

/* 6. Breakpoints -------------------------------------------------------- */

@media (min-width: 40em) {
  .qgroup > .mcqs { padding: 0 var(--space-2) var(--space-2); }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .link-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 60em) {
  main > section { padding-block: 6rem; }
  main > .hero { padding-block: var(--space-5) 6rem; }
  .cards { grid-template-columns: repeat(3, 1fr); }
  .link-grid { grid-template-columns: repeat(4, 1fr); }
  .site-footer-inner { grid-template-columns: auto 1fr auto; align-items: center; }
  .copyright { grid-column: 1 / -1; }
}