/* ============================================================
   Chicken Road — landing
   Style: Vibrant & Block-based (dark-first)
   Type:  Fredoka (display) / Nunito (body)
   ============================================================ */

/* ---------- 1. Design tokens ---------- */
:root {
  /* color */
  --c-primary:      #DC2626;
  --c-primary-600:  #B91C1C;
  --c-on-primary:   #FFFFFF;
  --c-secondary:    #2563EB;
  --c-accent:       #22C55E;
  --c-amber:        #F59E0B;

  --c-bg:           #0F172A;
  --c-bg-alt:       #131C33;
  --c-surface:      #1A2440;
  --c-surface-2:    #1F2B4D;
  --c-muted:        #1F1829;

  --c-fg:           #FFFFFF;
  --c-fg-soft:      #C3CEE6;
  --c-fg-dim:       #8D9BBA;

  --c-border:       rgba(255,255,255,.09);
  --c-border-str:   rgba(255,255,255,.18);
  --c-ring:         #DC2626;

  /* type */
  --font-display: 'Fredoka', system-ui, sans-serif;
  --font-body:    'Nunito', system-ui, -apple-system, sans-serif;

  --fs-xs:  0.8125rem;
  --fs-sm:  0.9375rem;
  --fs-md:  1.0625rem;
  --fs-lg:  1.1875rem;
  --fs-h3:  clamp(1.25rem, 1.05rem + .7vw, 1.5rem);
  --fs-h2:  clamp(1.75rem, 1.25rem + 2.2vw, 2.85rem);
  --fs-h1:  clamp(2.35rem, 1.5rem + 3.6vw, 4.1rem);

  /* space — density 4/10 (standard) */
  --s-1: 4px;  --s-2: 8px;  --s-3: 12px; --s-4: 16px;
  --s-5: 24px; --s-6: 32px; --s-7: 48px; --s-8: 64px; --s-9: 96px;

  /* shape + elevation */
  --r-sm: 10px; --r-md: 16px; --r-lg: 24px; --r-pill: 999px;
  --sh-1: 0 2px 8px rgba(2,6,23,.35);
  --sh-2: 0 12px 32px rgba(2,6,23,.45);
  --sh-3: 0 24px 60px rgba(2,6,23,.55);

  /* motion — 6/10 standard */
  --t-fast: 160ms;
  --t-base: 240ms;
  --ease:   cubic-bezier(.22,.61,.36,1);

  /* layout */
  --container: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --z-header: 100;
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  margin: 0;
  min-height: 100dvh;
  background: var(--c-bg);
  color: var(--c-fg);
  font-family: var(--font-body);
  font-size: var(--fs-md);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3 { font-family: var(--font-display); line-height: 1.12; margin: 0; font-weight: 600; letter-spacing: -.01em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; }

:focus-visible {
  outline: 3px solid var(--c-ring);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

.skip-link {
  position: absolute; left: var(--s-4); top: -100px;
  z-index: 999; padding: var(--s-3) var(--s-5);
  background: var(--c-primary); color: var(--c-on-primary);
  border-radius: var(--r-sm); font-weight: 700; text-decoration: none;
  transition: top var(--t-fast) var(--ease);
}
.skip-link:focus { top: var(--s-4); }

/* ---------- 3. Layout primitives ---------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.container-narrow { max-width: 820px; }

.section { padding-block: clamp(var(--s-8), 9vw, 112px); }
.section-alt { background: var(--c-bg-alt); border-block: 1px solid var(--c-border); }

.section-head { max-width: 720px; margin-bottom: var(--s-7); }
.section-head h2 { font-size: var(--fs-h2); margin-bottom: var(--s-4); }
.section-lead { color: var(--c-fg-soft); font-size: var(--fs-lg); }

.kicker {
  display: inline-block;
  font-family: var(--font-display); font-size: var(--fs-xs); font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: var(--s-3);
}
.kicker-alert { color: var(--c-amber); }

.ico { width: 20px; height: 20px; fill: currentColor; flex: none; }
.ico-lg { width: 28px; height: 28px; }

/* ---------- 4. Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s-2);
  min-height: 52px; padding: var(--s-3) var(--s-6);
  font-family: var(--font-display); font-size: var(--fs-md); font-weight: 600;
  border-radius: var(--r-pill); border: 2px solid transparent;
  text-decoration: none; cursor: pointer;
  transition: background var(--t-base) var(--ease),
              border-color var(--t-base) var(--ease),
              transform var(--t-fast) var(--ease),
              box-shadow var(--t-base) var(--ease);
}
.btn-primary { background: var(--c-primary); color: var(--c-on-primary); box-shadow: var(--sh-2); }
.btn-primary:hover { background: var(--c-primary-600); transform: translateY(-2px); box-shadow: var(--sh-3); }
.btn-primary:active { transform: translateY(0); }

.btn-ghost { background: transparent; color: var(--c-fg); border-color: var(--c-border-str); }
.btn-ghost:hover { background: rgba(255,255,255,.07); border-color: var(--c-fg-soft); transform: translateY(-2px); }
.btn-ghost:active { transform: translateY(0); }

/* ---------- 6. Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: var(--z-header);
  background: rgba(15,23,42,.82);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-border);
}
.header-inner {
  display: flex; align-items: center; gap: var(--s-5);
  min-height: 72px;
}
.logo { display: inline-flex; align-items: center; gap: var(--s-3); text-decoration: none; margin-right: auto; }
.logo-mark {
  display: grid; place-items: center; width: 40px; height: 40px;
  border-radius: 12px; background: linear-gradient(140deg, var(--c-primary), #7F1D1D);
  color: #FEF3C7; box-shadow: var(--sh-1); flex: none;
}
.logo-mark svg { width: 26px; height: 26px; }
.logo-text { font-family: var(--font-display); font-weight: 700; font-size: 1.3rem; letter-spacing: -.02em; }
.logo-text span { color: var(--c-primary); }

.site-nav { display: flex; align-items: center; gap: var(--s-2); }
.site-nav a {
  display: inline-flex; align-items: center; min-height: 44px;
  padding: var(--s-2) var(--s-3);
  font-size: var(--fs-sm); font-weight: 600; color: var(--c-fg-soft);
  text-decoration: none; border-radius: var(--r-sm);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.site-nav a:hover { color: var(--c-fg); background: rgba(255,255,255,.07); }

.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }
.nav-burger { display: none; }

/* ---------- 7. Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding-block: clamp(var(--s-8), 8vw, 104px) clamp(var(--s-8), 8vw, 104px);
  background:
    radial-gradient(900px 520px at 78% 8%, rgba(37,99,235,.20), transparent 62%),
    radial-gradient(760px 480px at 8% 92%, rgba(220,38,38,.20), transparent 60%),
    var(--c-bg);
}
.hero-grid {
  display: grid; grid-template-columns: 1.05fr .95fr;
  gap: clamp(var(--s-6), 5vw, var(--s-9)); align-items: center;
}
.hero h1 { font-size: var(--fs-h1); font-weight: 700; margin-bottom: var(--s-5); }
.hero h1 em { font-style: normal; color: var(--c-primary); }

.eyebrow {
  display: inline-flex; align-items: center; gap: var(--s-2);
  padding: 7px var(--s-4); margin-bottom: var(--s-5);
  border: 1px solid var(--c-border-str); border-radius: var(--r-pill);
  background: rgba(255,255,255,.04);
  font-size: var(--fs-xs); font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  color: var(--c-fg-soft);
}
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c-accent); box-shadow: 0 0 0 4px rgba(34,197,94,.2); }

.lead { font-size: var(--fs-lg); color: var(--c-fg-soft); max-width: 56ch; margin-bottom: var(--s-5); }
.lead strong { color: var(--c-fg); }

.hero-flags { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-5); margin-bottom: var(--s-6); }
.hero-flags li {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-size: var(--fs-sm); font-weight: 600; color: var(--c-fg-soft);
}
.hero-flags .ico { width: 18px; height: 18px; color: var(--c-accent); }
.hero-flags li:nth-child(2) .ico { color: var(--c-amber); }
.hero-flags li:nth-child(3) .ico { color: var(--c-primary); }

.hero-cta { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-bottom: var(--s-5); }
.hero-note { font-size: var(--fs-sm); color: var(--c-fg-dim); max-width: 52ch; }

.hero-copy { min-width: 0; }

/* Conceptual illustrations created for this page. */
.hero-visual { margin: 0; min-width: 0; }
.hero-art {
  display: block; width: 100%; height: auto;
  border-radius: 16px; background: var(--c-surface-2);
  box-shadow: var(--sh-2);
}

.break-visual { max-width: 720px; margin: 0 auto var(--s-7); }
.break-visual img { display: block; width: 100%; height: auto; border-radius: 16px; }
.break-visual figcaption {
  margin-top: var(--s-3); font-size: var(--fs-xs);
  line-height: 1.5; color: var(--c-fg-dim); text-align: center;
}

/* ---------- 8. Warning strip ---------- */
.warn-strip { background: linear-gradient(90deg, #451A1A, #3A1520); border-block: 1px solid rgba(220,38,38,.4); }
.warn-inner {
  display: flex; align-items: flex-start; gap: var(--s-4);
  padding-block: var(--s-5);
}
.warn-inner .ico { color: var(--c-amber); margin-top: 2px; }
.warn-inner p { font-size: var(--fs-sm); color: #FFE4E6; max-width: 92ch; }
.warn-inner strong { color: #fff; }

/* ---------- 9. Cards ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-5); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-4); }

.card {
  padding: var(--s-6);
  border: 1px solid var(--c-border); border-radius: var(--r-lg);
  background: var(--c-surface);
  transition: transform var(--t-base) var(--ease), border-color var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: var(--c-border-str); box-shadow: var(--sh-2); }
.card-ico {
  display: grid; place-items: center; width: 48px; height: 48px;
  margin-bottom: var(--s-4); border-radius: 14px;
  background: rgba(37,99,235,.16); color: #93C5FD;
}
.card-ico svg { width: 24px; height: 24px; fill: currentColor; }
.card h3 { font-size: var(--fs-h3); margin-bottom: var(--s-3); }
.card p { color: var(--c-fg-soft); font-size: var(--fs-sm); }

/* ---------- 10. Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--s-4); counter-reset: s; }
.step {
  position: relative;
  padding: var(--s-6) var(--s-5) var(--s-5);
  border: 1px solid var(--c-border); border-radius: var(--r-lg);
  background: var(--c-surface);
}
.step-num {
  display: inline-block; margin-bottom: var(--s-3);
  font-family: var(--font-display); font-weight: 700; font-size: 1.6rem;
  color: var(--c-primary); font-variant-numeric: tabular-nums;
}
.step h3 { font-size: var(--fs-md); margin-bottom: var(--s-2); }
.step p { font-size: var(--fs-sm); color: var(--c-fg-soft); }

/* ---------- 11. Levels ---------- */
.level {
  display: flex; flex-direction: column;
  padding: var(--s-5);
  border: 1px solid var(--c-border); border-radius: var(--r-lg);
  background: var(--c-surface);
  border-top: 4px solid var(--lvl, var(--c-accent));
  transition: transform var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease);
}
.level:hover { transform: translateY(-4px); box-shadow: var(--sh-2); }
.level-easy     { --lvl: #22C55E; }
.level-medium   { --lvl: #2563EB; }
.level-hard     { --lvl: #F59E0B; }
.level-hardcore { --lvl: #DC2626; }

.level-tag {
  display: inline-block; align-self: flex-start;
  padding: 3px var(--s-3); margin-bottom: var(--s-3);
  border-radius: var(--r-pill);
  background: color-mix(in srgb, var(--lvl) 18%, transparent);
  color: var(--lvl);
  font-size: var(--fs-xs); font-weight: 700;
}
.level h3 { font-size: 1.5rem; margin-bottom: var(--s-4); }
.level-specs { display: grid; gap: var(--s-2); margin: 0 0 var(--s-4); padding-bottom: var(--s-4); border-bottom: 1px solid var(--c-border); }
.level-specs > div { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-3); }
.level-specs dt { font-size: var(--fs-xs); color: var(--c-fg-dim); }
.level-specs dd {
  margin: 0; font-family: var(--font-display); font-weight: 600; font-size: var(--fs-sm);
  color: var(--c-fg); font-variant-numeric: tabular-nums; text-align: right;
}
.level > p:last-child { font-size: var(--fs-sm); color: var(--c-fg-soft); margin-top: auto; }

.disclaimer {
  display: flex; align-items: flex-start; gap: var(--s-3);
  margin-top: var(--s-5); padding: var(--s-4) var(--s-5);
  border: 1px solid var(--c-border); border-left: 3px solid var(--c-amber);
  border-radius: var(--r-md); background: rgba(245,158,11,.07);
  font-size: var(--fs-sm); color: var(--c-fg-soft);
}
.disclaimer .ico { color: var(--c-amber); margin-top: 2px; }

/* ---------- 12. Fairness ---------- */
.fair-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(var(--s-6), 5vw, var(--s-8)); align-items: start; }
.fair-grid h2 { font-size: var(--fs-h2); margin-bottom: var(--s-4); }

.check-list { display: grid; gap: var(--s-3); margin-block: var(--s-5); }
.check-list li {
  position: relative; padding-left: 34px;
  font-size: var(--fs-sm); color: var(--c-fg-soft);
}
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 4px;
  width: 20px; height: 20px; border-radius: 50%;
  background: rgba(34,197,94,.18);
  box-shadow: inset 0 0 0 2px var(--c-accent);
}
.check-list li::after {
  content: ""; position: absolute; left: 6px; top: 10px;
  width: 8px; height: 4px;
  border-left: 2px solid var(--c-accent); border-bottom: 2px solid var(--c-accent);
  transform: rotate(-45deg);
}
.check-list strong { color: var(--c-fg); }
.muted-note { font-size: var(--fs-sm); color: var(--c-fg-dim); }

.fact-panel {
  padding: var(--s-6);
  border: 1px solid var(--c-border-str); border-radius: var(--r-lg);
  background: linear-gradient(170deg, var(--c-surface-2), var(--c-surface));
  box-shadow: var(--sh-2);
}
.fact-label { font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: .12em; color: var(--c-fg-dim); }
.fact-value {
  font-family: var(--font-display); font-weight: 700; font-size: 4.5rem; line-height: 1;
  color: var(--c-accent); font-variant-numeric: tabular-nums;
}
.fact-value span { font-size: 2rem; margin-left: 2px; }
.fact-sub { font-size: var(--fs-sm); color: var(--c-fg-dim); }
.fact-panel hr { border: 0; border-top: 1px solid var(--c-border); margin-block: var(--s-5); }
.fact-explain { font-size: var(--fs-sm); color: var(--c-fg-soft); }
.fact-explain + .fact-explain { margin-top: var(--s-3); }
.fact-explain strong { color: var(--c-fg); }

/* ---------- 13. Responsible gaming ---------- */
.resp-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-5); }
.resp-card {
  display: flex; flex-direction: column;
  padding: var(--s-6);
  border: 1px solid var(--c-border); border-radius: var(--r-lg);
  background: var(--c-surface);
}
.resp-card h3 {
  display: flex; align-items: center; gap: var(--s-3);
  font-size: var(--fs-h3); margin-bottom: var(--s-4);
}
.resp-card ul { display: grid; gap: var(--s-3); }
.resp-card li { position: relative; padding-left: var(--s-5); font-size: var(--fs-sm); color: var(--c-fg-soft); }
.resp-card li::before {
  content: ""; position: absolute; left: 0; top: 10px;
  width: 7px; height: 7px; border-radius: 50%; background: var(--c-fg-dim);
}
.resp-card strong { color: var(--c-fg); }

.resp-warn { border-color: rgba(245,158,11,.35); background: linear-gradient(180deg, rgba(245,158,11,.08), var(--c-surface)); }
.resp-warn h3 .ico { color: var(--c-amber); }
.resp-warn li::before { background: var(--c-amber); }

.resp-card:nth-child(2) h3 .ico { color: #93C5FD; }
.resp-help { border-color: rgba(34,197,94,.35); background: linear-gradient(180deg, rgba(34,197,94,.08), var(--c-surface)); }
.resp-help h3 .ico { color: var(--c-accent); }


.resp-foot { margin-top: auto; padding-top: var(--s-4); font-size: var(--fs-xs); color: var(--c-fg-dim); }

.rules-box {
  margin-top: var(--s-5); padding: var(--s-6);
  border: 1px solid var(--c-border-str); border-radius: var(--r-lg);
  background: linear-gradient(120deg, rgba(37,99,235,.12), rgba(220,38,38,.10));
}
.rules-box h3 { font-size: var(--fs-h3); margin-bottom: var(--s-5); }
.rules-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-5); }
.rules-row p { font-size: var(--fs-sm); color: var(--c-fg-soft); }
.rules-row span {
  display: grid; place-items: center; width: 32px; height: 32px; margin-bottom: var(--s-3);
  border-radius: 50%; background: var(--c-primary); color: #fff;
  font-family: var(--font-display); font-weight: 700; font-size: var(--fs-sm);
}

/* ---------- 14. FAQ ---------- */
.faq { display: grid; gap: var(--s-3); }
.faq details {
  border: 1px solid var(--c-border); border-radius: var(--r-md);
  background: var(--c-surface);
  transition: border-color var(--t-base) var(--ease), background var(--t-base) var(--ease);
}
.faq details[open] { border-color: var(--c-border-str); background: var(--c-surface-2); }
.faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: var(--s-4);
  min-height: 60px; padding: var(--s-4) var(--s-5);
  font-family: var(--font-display); font-weight: 600; font-size: var(--fs-md);
  cursor: pointer; list-style: none;
  transition: color var(--t-fast) var(--ease);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: #FCA5A5; }
.faq summary::after {
  content: ""; flex: none; width: 12px; height: 12px;
  border-right: 2.5px solid var(--c-primary); border-bottom: 2.5px solid var(--c-primary);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform var(--t-base) var(--ease);
}
.faq details[open] summary::after { transform: rotate(-135deg) translate(-2px, -2px); }
.faq-body { padding: 0 var(--s-5) var(--s-5); }
.faq-body p { font-size: var(--fs-sm); color: var(--c-fg-soft); max-width: 72ch; }

/* ---------- 15. Closing ---------- */
.closing {
  padding-block: clamp(var(--s-8), 8vw, 104px);
  background:
    radial-gradient(760px 420px at 50% 0%, rgba(220,38,38,.22), transparent 65%),
    var(--c-bg);
  border-top: 1px solid var(--c-border);
}
.closing-inner { max-width: 720px; margin-inline: auto; text-align: center; }
.closing h2 { font-size: var(--fs-h2); margin-bottom: var(--s-4); }
.closing p { color: var(--c-fg-soft); font-size: var(--fs-lg); }
.closing-cta { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--s-3); margin-block: var(--s-6) var(--s-5); }
.closing-age {
  display: inline-flex; align-items: center; gap: var(--s-3);
  font-size: var(--fs-sm) !important; color: var(--c-fg-dim) !important;
}

/* ---------- 16. Footer ---------- */
.site-footer { background: #0A1122; border-top: 1px solid var(--c-border); padding-block: var(--s-8) var(--s-5); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: var(--s-6); padding-bottom: var(--s-7); }
.footer-brand .logo-text { display: block; margin-bottom: var(--s-3); }
.footer-brand p { font-size: var(--fs-sm); color: var(--c-fg-dim); max-width: 46ch; }
.footer-nav { display: grid; gap: var(--s-1); align-content: start; }
.footer-nav h3 {
  font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: .12em;
  color: var(--c-fg-dim); margin-bottom: var(--s-2);
}
.footer-nav a {
  display: inline-flex; align-items: center; min-height: 36px;
  font-size: var(--fs-sm); color: var(--c-fg-soft); text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}
.footer-nav a:hover { color: var(--c-fg); text-decoration: underline; text-underline-offset: 4px; }

.footer-bottom {
  display: flex; align-items: flex-start; gap: var(--s-4);
  padding-top: var(--s-5); border-top: 1px solid var(--c-border);
}
.footer-bottom p { font-size: var(--fs-xs); color: var(--c-fg-dim); max-width: 100ch; }

/* ---------- 17. Responsive ---------- */
@media (max-width: 1080px) {
  .grid-4, .steps, .rules-row { grid-template-columns: repeat(2, 1fr); }
  .resp-grid { grid-template-columns: 1fr; }
  .fair-grid { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 76px; }
  .hero-grid { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }

  /* mobile nav */
  .nav-burger {
    display: grid; place-content: center; gap: 5px;
    width: 48px; height: 48px; margin-left: auto;
    border: 1px solid var(--c-border-str); border-radius: var(--r-sm);
    cursor: pointer; order: 2;
  }
  .nav-burger span {
    display: block; width: 20px; height: 2px; border-radius: 2px;
    background: var(--c-fg);
    transition: transform var(--t-base) var(--ease), opacity var(--t-fast) var(--ease);
  }
  .nav-toggle:checked ~ .nav-burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle:checked ~ .nav-burger span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked ~ .nav-burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .nav-toggle:focus-visible ~ .nav-burger { outline: 3px solid var(--c-ring); outline-offset: 3px; }

  .header-inner { flex-wrap: wrap; gap: var(--s-3); }
  .site-nav {
    order: 3; flex-basis: 100%; flex-direction: column; align-items: stretch;
    gap: 0; max-height: 0; overflow: hidden;
    transition: max-height var(--t-base) var(--ease);
  }
  .nav-toggle:checked ~ .site-nav { max-height: 420px; }
  .site-nav a { min-height: 52px; border-bottom: 1px solid var(--c-border); border-radius: 0; }
}

@media (max-width: 620px) {
  .grid-4, .steps, .rules-row, .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
  .hero-cta .btn { width: 100%; }
  .fact-value { font-size: 3.5rem; }
}

/* ---------- 18. Light mode ---------- */
@media (prefers-color-scheme: light) {
  :root {
    --c-bg:         #FFFBF4;
    --c-bg-alt:     #FDF3E3;
    --c-surface:    #FFFFFF;
    --c-surface-2:  #FFF7EC;
    --c-fg:         #14121F;
    --c-fg-soft:    #3E3A52;
    --c-fg-dim:     #6B6683;
    --c-border:     rgba(20,18,31,.10);
    --c-border-str: rgba(20,18,31,.22);
    --c-accent:     #15803D;
  }
  .site-header { background: rgba(255,251,244,.88); }
  .hero {
    background:
      radial-gradient(900px 520px at 78% 8%, rgba(37,99,235,.10), transparent 62%),
      radial-gradient(760px 480px at 8% 92%, rgba(220,38,38,.10), transparent 60%),
      var(--c-bg);
  }
  .warn-strip { background: linear-gradient(90deg, #FEE2E2, #FFE4E6); border-block-color: rgba(220,38,38,.35); }
  .warn-inner p { color: #7F1D1D; }
  .warn-inner strong { color: #450A0A; }
  .warn-inner .ico { color: #B45309; }
  .card, .step, .level, .resp-card, .faq details { box-shadow: var(--sh-1); }
  .card-ico { background: rgba(37,99,235,.12); color: #1D4ED8; }
  .fact-panel { background: linear-gradient(170deg, #FFFFFF, var(--c-surface-2)); }
  .closing {
    background: radial-gradient(760px 420px at 50% 0%, rgba(220,38,38,.12), transparent 65%), var(--c-bg);
  }
  .site-footer { background: #F6ECDC; }
  .resp-card:nth-child(2) h3 .ico { color: #1D4ED8; }
  .faq summary:hover { color: var(--c-primary); }
  :root { --sh-1: 0 1px 3px rgba(20,18,31,.08); --sh-2: 0 8px 24px rgba(20,18,31,.10); --sh-3: 0 20px 48px rgba(20,18,31,.14); }
}

/* ---------- 19. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .card:hover, .level:hover, .btn:hover { transform: none; }
}

/* ---------- 20. Print ---------- */
@media print {
  .site-header, .hero-visual, .closing-cta, .nav-burger { display: none; }
  body { background: #fff; color: #000; }
}