:root {
  --colour-bg: #edece7;
  --colour-surface: #ffffff;
  --colour-ink: #1b1a18;
  --colour-ink-soft: #57544d;
  --colour-ink-faint: #86827a;
  --colour-line: #d8d5cc;
  --colour-line-soft: #e6e3da;
  --colour-accent: #d94f1e;
  --colour-accent-dark: #a83b14;
  --colour-accent-tint: #fbe6db;
  --colour-focus: #0b5fff;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;
  --space-9: 128px;

  --container: 1180px;
  --container-narrow: 760px;

  --fs-sm: 0.875rem;
  --fs-base: 1.0625rem;
  --fs-md: 1.25rem;
  --fs-lg: 1.6rem;
  --fs-xl: 2.1rem;
  --fs-2xl: 2.9rem;
  --fs-hero: 3.8rem;

  --font-display: "Nunito", "Segoe UI", sans-serif;
  --font-body: "Work Sans", "Segoe UI", sans-serif;

  --radius-sm: 3px;
  --radius-md: 6px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

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

body {
  margin: 0;
  background: var(--colour-bg);
  color: var(--colour-ink);
  font-family: var(--font-body);
  font-weight: 300;
  font-size: var(--fs-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 var(--space-3);
  color: var(--colour-ink);
}

h1 { font-size: var(--fs-hero); letter-spacing: -0.01em; }
h2 { font-size: var(--fs-2xl); letter-spacing: -0.01em; }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-md); }

p {
  margin: 0 0 var(--space-4);
  max-width: 68ch;
}

p.lede {
  font-size: var(--fs-md);
  color: var(--colour-ink-soft);
  font-weight: 400;
}

a {
  color: var(--colour-accent-dark);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  background: var(--colour-accent-tint);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--colour-focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--colour-ink);
  color: #fff;
  padding: var(--space-2) var(--space-3);
  z-index: 200;
  text-decoration: none;
}

.skip-link:focus {
  left: var(--space-3);
  top: var(--space-3);
}

.small-caps {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-sm);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--colour-accent-dark);
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

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

.site-header {
  border-bottom: 1px solid var(--colour-line);
  background: var(--colour-bg);
}

.site-header__bar {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-4) var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--colour-ink);
}

.brand:hover {
  background: none;
}

.brand__mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
}

.brand__mark span {
  color: var(--colour-accent);
}

.brand__meta {
  font-size: var(--fs-sm);
  color: var(--colour-ink-faint);
  white-space: nowrap;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  text-decoration: none;
  color: var(--colour-ink);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: background-color 0.15s ease;
}

.main-nav a:hover {
  background: var(--colour-accent-tint);
}

.main-nav a[aria-current="page"] {
  color: var(--colour-accent-dark);
  background: var(--colour-accent-tint);
}

.age-flag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--colour-accent-dark);
  border: 1px solid var(--colour-accent);
  padding: 2px var(--space-2);
  border-radius: 999px;
  white-space: nowrap;
}

/* ---------- Buttons / links ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  line-height: 1;
}

.btn-primary {
  background: var(--colour-accent);
  color: #fff;
}

.btn-primary::after {
  content: "→";
  background: rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  width: 1.4em;
  height: 1.4em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8em;
}

.btn-primary:hover {
  background: var(--colour-accent-dark);
}

.btn-secondary {
  background: transparent;
  border-color: var(--colour-ink);
  color: var(--colour-ink);
}

.btn-secondary:hover {
  background: var(--colour-ink);
  color: #fff;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

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

main {
  display: block;
}

.section {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--colour-line-soft);
}

.section:first-of-type {
  border-top: none;
}

.section--tint {
  background: var(--colour-surface);
}

.section--dark {
  background: var(--colour-ink);
  color: #f1efe9;
}

.section--dark h2, .section--dark h3 {
  color: #fff;
}

.section--dark p {
  color: #cbc7bd;
}

.section--dark a {
  color: #ffb999;
}

/* progressively step sections inward */
.chapter:nth-of-type(1) .container { padding-left: var(--space-5); padding-right: var(--space-5); }
.chapter:nth-of-type(2) .container { padding-left: var(--space-6); padding-right: var(--space-6); }
.chapter:nth-of-type(3) .container { padding-left: var(--space-7); padding-right: var(--space-7); }
.chapter:nth-of-type(4) .container { padding-left: var(--space-6); padding-right: var(--space-6); }
.chapter:nth-of-type(5) .container { padding-left: var(--space-5); padding-right: var(--space-5); }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.section-head h2 {
  margin-bottom: var(--space-2);
}

.hairlines {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 46px;
  margin: var(--space-6) auto;
}

.hairlines span {
  display: block;
  height: 1px;
  background: var(--colour-accent);
}

.hairlines span:nth-child(2) { width: 70%; margin: 0 auto; }
.hairlines span:nth-child(3) { width: 40%; margin: 0 auto; }

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

.hero {
  padding: var(--space-8) 0 var(--space-7);
  position: relative;
  overflow: hidden;
}

.hero__plate {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    repeating-linear-gradient(115deg, rgba(217,79,30,0.05) 0 2px, transparent 2px 26px),
    var(--colour-bg);
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 46rem;
}

.hero .small-caps {
  display: inline-block;
  margin-bottom: var(--space-3);
}

.hero h1 {
  margin-bottom: var(--space-4);
}

.hero__definition {
  font-size: var(--fs-md);
  color: var(--colour-ink-soft);
  max-width: 52ch;
  margin-bottom: var(--space-5);
}

/* ---------- Facts strip ---------- */

.facts-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  padding: var(--space-6) 0;
  background: var(--colour-surface);
  border-top: 1px solid var(--colour-line);
  border-bottom: 1px solid var(--colour-line);
}

.fact {
  padding: 0 var(--space-4);
}

.fact:not(:first-child) {
  border-left: 1px solid var(--colour-line);
}

.fact__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-xl);
  color: var(--colour-accent-dark);
  display: block;
}

.fact__label {
  font-size: var(--fs-sm);
  color: var(--colour-ink-soft);
}

/* ---------- Plates (non-photographic imagery treatment) ---------- */

.plate {
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  min-height: 220px;
  display: flex;
  align-items: flex-end;
  padding: var(--space-4);
  color: #fff;
}

.plate__tag {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(27, 26, 24, 0.55);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.plate--a { background: linear-gradient(160deg, #2b2925, #1b1a18 70%); }
.plate--b { background: repeating-linear-gradient(45deg, #d94f1e, #d94f1e 12px, #a83b14 12px, #a83b14 24px); }
.plate--c { background: repeating-radial-gradient(circle at 30% 30%, #3a3733, #3a3733 2px, #1b1a18 2px, #1b1a18 22px); }
.plate--d { background: linear-gradient(135deg, #57544d, #1b1a18); }
.plate--e {
  background:
    radial-gradient(circle at 20% 20%, rgba(217,79,30,0.5), transparent 55%),
    linear-gradient(200deg, #2b2925, #1b1a18);
}

/* ---------- Cards ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}

.card {
  background: var(--colour-surface);
  border: 1px solid var(--colour-line);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

@media (prefers-reduced-motion: no-preference) {
  .card {
    transform: translateY(0);
  }
  .card:hover, .card:focus-within {
    transform: translateY(-4px);
    box-shadow: 0 14px 30px -18px rgba(27, 26, 24, 0.35);
  }
}

.card__reveal {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.25s ease, opacity 0.2s ease;
}

.card:hover .card__reveal,
.card:focus-within .card__reveal {
  max-height: 60px;
  opacity: 1;
  margin-top: var(--space-2);
}

.card h3 {
  font-size: var(--fs-md);
  margin-bottom: 0;
}

.card .tag {
  align-self: flex-start;
}

.tag {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--colour-accent-tint);
  color: var(--colour-accent-dark);
  padding: 2px var(--space-2);
  border-radius: 999px;
}

.tag--dark {
  background: var(--colour-ink);
  color: #fff;
}

/* ---------- Lists ---------- */

ul.motif-list {
  list-style: none;
  margin: 0 0 var(--space-4);
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

ul.motif-list li {
  position: relative;
  padding-left: var(--space-4);
}

ul.motif-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  background: var(--colour-accent);
  transform: rotate(45deg);
}

dl.fact-list {
  display: grid;
  grid-template-columns: minmax(140px, 220px) 1fr;
  gap: var(--space-2) var(--space-4);
  margin: 0 0 var(--space-5);
}

dl.fact-list dt {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--colour-ink-soft);
}

dl.fact-list dd {
  margin: 0;
}

/* ---------- Verified panel ---------- */

.verified-panel {
  background: var(--colour-accent-tint);
  border-left: 3px solid var(--colour-accent);
  padding: var(--space-3) var(--space-4);
  font-size: var(--fs-sm);
  color: var(--colour-accent-dark);
  margin: var(--space-5) 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.verified-panel strong {
  font-family: var(--font-display);
}

/* ---------- Notice / compliance blocks ---------- */

.notice-block {
  background: var(--colour-surface);
  border: 1px solid var(--colour-line);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  margin: var(--space-5) 0;
}

.notice-block h3 {
  font-size: var(--fs-md);
}

.helpline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.helpline-list li {
  border-top: 1px solid var(--colour-line-soft);
  padding-top: var(--space-3);
}

.helpline-list li:first-child {
  border-top: none;
  padding-top: 0;
}

.helpline-list strong {
  font-family: var(--font-display);
  display: block;
}

/* ---------- FAQ ---------- */

.faq-item {
  border-top: 1px solid var(--colour-line);
  padding: var(--space-4) 0;
}

.faq-item:last-child {
  border-bottom: 1px solid var(--colour-line);
}

.faq-item h3 {
  font-size: var(--fs-base);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.faq-item__answer {
  border-left: 2px solid var(--colour-line);
  padding-left: var(--space-4);
  color: var(--colour-ink-soft);
}

.faq-item__answer p:last-child {
  margin-bottom: 0;
}

/* ---------- Table ---------- */

table.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-5) 0;
  font-size: var(--fs-sm);
}

table.data-table caption {
  text-align: left;
  font-family: var(--font-display);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

table.data-table th, table.data-table td {
  text-align: left;
  padding: var(--space-3);
  border-bottom: 1px solid var(--colour-line);
  vertical-align: top;
}

table.data-table th {
  font-family: var(--font-display);
  font-weight: 700;
  background: var(--colour-surface);
}

/* ---------- Forms ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-7);
}

.contact-card {
  background: var(--colour-surface);
  border: 1px solid var(--colour-line);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}

.contact-card + .contact-card {
  margin-top: var(--space-4);
}

.contact-card h3 {
  font-size: var(--fs-md);
}

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

.site-footer {
  background: var(--colour-ink);
  color: #cbc7bd;
  padding: var(--space-6) 0 var(--space-5);
}

.site-footer a {
  color: #f1efe9;
}

.site-footer__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.site-footer__mark {
  font-family: var(--font-display);
  font-weight: 800;
  color: #fff;
}

.site-footer__links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin: 0;
  padding: 0;
  font-size: var(--fs-sm);
}

.site-footer__links a {
  text-decoration: none;
}

.site-footer__links a:hover {
  text-decoration: underline;
}

.responsible-notice {
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid #3a3733;
  font-size: var(--fs-sm);
  line-height: 1.7;
}

.responsible-notice strong {
  color: #fff;
}

.copyright {
  margin-top: var(--space-4);
  font-size: 0.8rem;
  color: #8a867d;
}

/* ---------- Utility ---------- */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.stack {
  display: grid;
  gap: var(--space-4);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.centre {
  text-align: center;
}

@media (max-width: 860px) {
  .facts-strip { grid-template-columns: repeat(2, 1fr); }
  .fact:nth-child(3) { border-left: none; }
  .two-col, .contact-grid { grid-template-columns: 1fr; gap: var(--space-5); }
  h1 { font-size: 2.4rem; }
  h2 { font-size: 1.9rem; }
  .chapter .container { padding-left: var(--space-4) !important; padding-right: var(--space-4) !important; }
  dl.fact-list { grid-template-columns: 1fr; }
  dl.fact-list dt { margin-top: var(--space-3); }
}

@media (max-width: 560px) {
  .facts-strip { grid-template-columns: 1fr 1fr; }
  .site-header__bar { padding: var(--space-3) var(--space-4); }
  .main-nav { gap: var(--space-1) var(--space-3); font-size: 0.9rem; }
  .hero { padding: var(--space-6) 0 var(--space-5); }
  .btn { width: 100%; justify-content: center; }
}