/* =========================================================================
   ETERN LEARNING — DESIGN SYSTEM
   Warm cream surfaces, Etern teal/blue, playful accents.
   Plain CSS. No build step, no framework, no external runtime.
   ========================================================================= */

/* -------------------------------------------------------------- 1. tokens */

:root {
  --radius: 1.25rem;
  --radius-sm: calc(var(--radius) - 4px);
  --radius-md: calc(var(--radius) - 2px);
  --radius-lg: var(--radius);
  --radius-xl: calc(var(--radius) + 4px);
  --radius-2xl: calc(var(--radius) + 8px);
  --radius-3xl: calc(var(--radius) + 12px);

  --font-display: "Fraunces", ui-serif, Georgia, "Times New Roman", serif;
  --font-sans: "Plus Jakarta Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;

  /* Warm cream base — never pure white everywhere */
  --background: oklch(0.985 0.012 85);
  --foreground: oklch(0.24 0.02 250);
  --surface: oklch(0.965 0.018 82);
  --cream: oklch(0.975 0.02 78);
  --card: oklch(0.998 0.005 85);

  /* Etern brand teal #2ae9e2 — deepened to the same hue for text contrast */
  --primary: oklch(0.588 0.099 190.4);
  --primary-foreground: oklch(0.99 0.01 190);
  --primary-soft: oklch(0.93 0.05 190.8);

  /* Exact brand values, for fills, glows and gradients */
  --brand-teal: oklch(0.846 0.14 190.8);
  --brand-blue: oklch(0.669 0.161 244.9);
  --brand-orange: oklch(0.665 0.196 40);
  --brand-orange-foreground: oklch(0.99 0.01 60);

  --secondary: oklch(0.95 0.02 82);
  --muted: oklch(0.955 0.014 84);
  --muted-foreground: oklch(0.52 0.02 250);

  --accent: oklch(0.669 0.161 244.9);
  --accent-foreground: oklch(0.99 0.01 245);

  --sky: oklch(0.86 0.075 244.9);
  --sky-foreground: oklch(0.32 0.08 245);
  --leaf: oklch(0.83 0.09 152);
  --leaf-foreground: oklch(0.32 0.07 155);
  --sun: oklch(0.89 0.11 88);
  --sun-foreground: oklch(0.36 0.08 70);
  --coral: oklch(0.71 0.16 32);
  --coral-foreground: oklch(0.99 0.01 40);

  --destructive: oklch(0.577 0.19 27);
  --destructive-foreground: oklch(0.99 0.005 40);

  --border: oklch(0.9 0.018 82);
  --ring: oklch(0.588 0.099 190.4);

  --shadow-soft: 0 1px 2px oklch(0.3 0.05 220 / 0.04), 0 12px 32px -12px oklch(0.3 0.05 220 / 0.14);
  --shadow-lift: 0 2px 4px oklch(0.3 0.05 220 / 0.05), 0 28px 60px -24px oklch(0.3 0.05 220 / 0.24);

  --shell: 80rem;
  --gutter: 1.25rem;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (min-width: 640px) {
  :root { --gutter: 2rem; }
}

/* --------------------------------------------------------------- 2. reset */

*,
*::before,
*::after { box-sizing: border-box; border-color: var(--border); }

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  background-color: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.is-locked { overflow: hidden; }

img, svg, video { display: block; max-width: 100%; }
svg { flex: none; }
img { height: auto; }

button, input, select, textarea { font: inherit; color: inherit; }

fieldset { border: 0; padding: 0; min-width: 0; }
legend { display: block; width: 100%; padding: 0; }
button { background: none; border: 0; cursor: pointer; }

a { color: inherit; text-decoration: none; }

ul, ol { list-style: none; padding: 0; }

[hidden] { display: none !important; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  text-wrap: balance;
}

:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--card);
  border-radius: 0 0 var(--radius-md) 0;
  font-weight: 600;
  box-shadow: var(--shadow-soft);
}
.skip-link:focus { left: 0; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip-path: inset(50%);
  white-space: nowrap;
}

/* ------------------------------------------------------------- 3. layout */

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page { display: flex; min-height: 100vh; flex-direction: column; }
.page > main { flex: 1; }

.section {
  position: relative;
  overflow: hidden;
  background-color: var(--background);
}
.section > .shell { padding-block: 5rem; }

@media (min-width: 768px) {
  .section > .shell { padding-block: 7rem; }
}

.section--surface { background-color: var(--surface); }
.section--cream { background-color: var(--cream); }
.section--dark { background-color: var(--foreground); color: var(--background); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--background); }

.stack { display: flex; flex-direction: column; }
.stack-2 { gap: 0.5rem; } .stack-3 { gap: 0.75rem; } .stack-4 { gap: 1rem; }
.stack-5 { gap: 1.25rem; } .stack-6 { gap: 1.5rem; } .stack-8 { gap: 2rem; }

.grid { display: grid; gap: 1.25rem; }
.grid--gap-lg { gap: 2rem; }

@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.split { display: grid; gap: 3rem; }
@media (min-width: 1024px) {
  .split { grid-template-columns: 1fr 1fr; }
  .split--wide-left { grid-template-columns: 1.15fr 0.85fr; }
  .split--wide-right { grid-template-columns: 0.85fr 1.15fr; }
  .split--center { align-items: center; }
  .split--start { align-items: start; }
}

/* soft colour glow used behind heroes and dark panels */
.blob {
  position: absolute;
  border-radius: 999px;
  filter: blur(60px);
  opacity: 0.55;
  pointer-events: none;
}

/* -------------------------------------------------------- 4. type helpers */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  align-self: flex-start;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: color-mix(in oklab, var(--card) 70%, transparent);
  padding: 0.375rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

.section-heading { display: flex; flex-direction: column; gap: 1rem; max-width: 42rem; }
.section-heading--center { margin-inline: auto; max-width: 48rem; text-align: center; align-items: center; }

.section-heading h2, .section-heading > .h2 {
  font-size: clamp(1.875rem, 1.1rem + 2.6vw, 3.25rem);
  line-height: 1.1;
}

.lead { font-size: 1.0625rem; line-height: 1.7; color: var(--muted-foreground); }
@media (min-width: 640px) { .lead { font-size: 1.125rem; } }

.muted { color: var(--muted-foreground); }
.small { font-size: 0.875rem; }
.tiny { font-size: 0.75rem; }
.label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

.display-1 { font-size: clamp(2.4rem, 1.2rem + 4.2vw, 4.2rem); line-height: 1.03; }
.display-2 { font-size: clamp(2.1rem, 1.2rem + 3.2vw, 3.75rem); line-height: 1.05; }
.h3 { font-family: var(--font-display); font-weight: 600; font-size: 1.5rem; line-height: 1.25; letter-spacing: -0.02em; }

.gradient-text {
  background-image: linear-gradient(100deg, var(--primary), var(--brand-blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.rainbow-text {
  background-image: linear-gradient(100deg, var(--brand-orange), var(--sun), var(--leaf), var(--brand-blue), var(--primary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ------------------------------------------------------------ 5. buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 0 1.25rem;
  height: 2.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.btn svg { width: 1rem; height: 1rem; flex: none; }

.btn--lg { height: 3rem; padding-inline: 1.75rem; font-size: 1rem; }
.btn--xl { height: 3.5rem; padding-inline: 2rem; font-size: 1rem; }
.btn--block { width: 100%; }

.btn--primary { background: var(--primary); color: var(--primary-foreground); }
.btn--primary:hover { background: color-mix(in oklab, var(--primary) 90%, black); }

.btn--brand { background: var(--brand-orange); color: var(--brand-orange-foreground); box-shadow: var(--shadow-lift); }
.btn--brand:hover { transform: translateY(-3px); box-shadow: var(--shadow-soft); }

.btn--outline { border-color: var(--border); background: var(--card); color: var(--foreground); }
.btn--outline:hover { border-color: color-mix(in oklab, var(--primary) 45%, transparent); color: var(--primary); }

.btn--soft { background: var(--card); border-color: var(--border); color: var(--foreground); box-shadow: var(--shadow-soft); }
.btn--soft:hover { transform: translateY(-3px); }

.btn--ghost { color: var(--muted-foreground); }
.btn--ghost:hover { background: var(--secondary); color: var(--foreground); }

.btn[disabled] { opacity: 0.5; pointer-events: none; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
}
.link-arrow svg { width: 1rem; height: 1rem; transition: transform 0.3s; }
.link-arrow:hover svg { transform: translateX(4px); }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted-foreground);
}
.back-link:hover { color: var(--primary); }
.back-link svg { width: 1rem; height: 1rem; }

/* ---------------------------------------------------- 6. accent utilities */

.accent-primary { --accent-soft: var(--primary-soft); --accent-ink: var(--primary); --accent-solid: var(--primary); }
.accent-sky     { --accent-soft: color-mix(in oklab, var(--sky) 35%, transparent);  --accent-ink: var(--sky-foreground);  --accent-solid: var(--sky); }
.accent-leaf    { --accent-soft: color-mix(in oklab, var(--leaf) 35%, transparent); --accent-ink: var(--leaf-foreground); --accent-solid: var(--leaf); }
.accent-sun     { --accent-soft: color-mix(in oklab, var(--sun) 40%, transparent);  --accent-ink: var(--sun-foreground);  --accent-solid: var(--sun); }
.accent-coral   { --accent-soft: color-mix(in oklab, var(--coral) 20%, transparent);--accent-ink: var(--coral);           --accent-solid: var(--coral); }
.accent-accent  { --accent-soft: color-mix(in oklab, var(--accent) 15%, transparent);--accent-ink: var(--accent);         --accent-solid: var(--accent); }

.tile {
  display: grid;
  place-items: center;
  flex: none;
  border-radius: var(--radius-md);
  background: var(--accent-soft, var(--primary-soft));
  color: var(--accent-ink, var(--primary));
  width: 3rem;
  height: 3rem;
}
.tile svg { width: 1.5rem; height: 1.5rem; }
.tile--sm { width: 2.75rem; height: 2.75rem; }
.tile--sm svg { width: 1.25rem; height: 1.25rem; }
.tile--lg { width: 3.5rem; height: 3.5rem; border-radius: var(--radius-lg); }
.tile--lg svg { width: 1.75rem; height: 1.75rem; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--accent-soft, var(--surface));
  color: var(--accent-ink, var(--foreground));
}
.pill--plain { background: var(--surface); color: color-mix(in oklab, var(--foreground) 75%, transparent); }
.pill--outline { background: transparent; border: 1px solid var(--border); color: var(--muted-foreground); font-weight: 600; }

/* --------------------------------------------------------------- 7. cards */

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  background: var(--card);
  padding: 1.5rem;
}
.card--pad-lg { padding: 1.75rem; }
.card--flat { background: color-mix(in oklab, var(--card) 70%, transparent); }
.card--surface { background: var(--surface); }
.card--dashed { border-style: dashed; background: var(--surface); }
.card--bordered { border-width: 2px; }
.card--soft { box-shadow: var(--shadow-soft); }

.card-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s;
}
.card-link:hover {
  transform: translateY(-6px);
  border-color: color-mix(in oklab, var(--primary) 35%, transparent);
  box-shadow: var(--shadow-lift);
}
.card-link .link-arrow { margin-top: auto; padding-top: 0.5rem; }
/* opt back into grid when a card-link also lays out as a .split */
.card-link.split { display: grid; }

.numbered-card { display: flex; gap: 1.25rem; }
.numbered-card > .num {
  font-family: var(--font-display);
  font-size: 1.875rem;
  color: color-mix(in oklab, var(--primary) 45%, transparent);
}

/* ------------------------------------------------------------- 8. navbar */

.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  padding-block: 1rem;
  transition: padding 0.3s, background-color 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.site-header.is-scrolled {
  padding-block: 0.5rem;
  border-bottom-color: color-mix(in oklab, var(--border) 70%, transparent);
  background: color-mix(in oklab, var(--background) 80%, transparent);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(18px);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.logo { display: inline-flex; align-items: center; gap: 0.625rem; }
.logo img, .logo svg { height: 2.5rem; width: auto; transition: transform 0.3s; }
.logo:hover img, .logo:hover svg { transform: translateY(-2px); }
.logo-word { display: flex; flex-direction: column; line-height: 1; }
.logo-word b {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}
.logo-word span {
  font-size: 0.5625rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

.nav-links, .nav-actions { display: none; }

@media (min-width: 1024px) {
  .nav-links { display: flex; align-items: center; gap: 0.25rem; }
  .nav-actions { display: flex; align-items: center; gap: 0.5rem; }
}

.nav-links a {
  border-radius: 999px;
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted-foreground);
  transition: background-color 0.2s, color 0.2s;
}
.nav-links a:hover { background: var(--secondary); color: var(--foreground); }
.nav-links a[aria-current="page"] { background: var(--secondary); color: var(--foreground); }

.nav-toggle {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: color-mix(in oklab, var(--card) 80%, transparent);
  backdrop-filter: blur(8px);
}
.nav-toggle svg { width: 1.25rem; height: 1.25rem; }
@media (min-width: 1024px) { .nav-toggle { display: none; } }

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  flex-direction: column;
  background: var(--background);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s;
}
.mobile-menu.is-open { opacity: 1; visibility: visible; }
.mobile-menu[hidden] { display: none; }
@media (min-width: 1024px) { .mobile-menu { display: none; } }

.mobile-menu__top { display: flex; align-items: center; justify-content: space-between; padding: 1.25rem; }
.mobile-menu__links { display: flex; flex: 1; flex-direction: column; justify-content: center; padding-inline: 1.5rem; }
.mobile-menu__links a {
  display: block;
  border-bottom: 1px solid color-mix(in oklab, var(--border) 60%, transparent);
  padding-block: 1rem;
  font-family: var(--font-display);
  font-size: 1.875rem;
}
.mobile-menu__cta { display: flex; flex-direction: column; gap: 0.75rem; padding: 0 1.5rem 2.5rem; }

/* -------------------------------------------------------------- 9. footer */

.site-footer { border-top: 1px solid var(--border); background: var(--surface); }
.site-footer > .shell { padding-block: 4rem; }

.footer-grid { display: grid; gap: 3rem; }
@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1.2fr; }
}

.footer-links { display: flex; flex-direction: column; gap: 0.625rem; }
.footer-links a { font-size: 0.875rem; color: color-mix(in oklab, var(--foreground) 80%, transparent); }
.footer-links a:hover { color: var(--primary); }

.social-row { display: flex; align-items: center; gap: 0.5rem; }
.social-row a {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
  color: var(--muted-foreground);
  transition: border-color 0.2s, color 0.2s;
}
.social-row a:hover { border-color: color-mix(in oklab, var(--primary) 40%, transparent); color: var(--primary); }
.social-row svg { width: 1rem; height: 1rem; }

.contact-list { display: flex; flex-direction: column; gap: 0.75rem; font-size: 0.875rem; }
.contact-list li { display: flex; align-items: flex-start; gap: 0.625rem; }
.contact-list svg { width: 1rem; height: 1rem; margin-top: 0.15rem; flex: none; color: var(--primary); }
.contact-list a:hover { color: var(--primary); }

.store-links { display: flex; flex-wrap: wrap; gap: 0.5rem; padding-top: 0.25rem; }
.store-links a {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  padding: 0.375rem 0.875rem;
  font-size: 0.75rem;
  font-weight: 500;
}
.store-links a:hover { border-color: color-mix(in oklab, var(--primary) 40%, transparent); color: var(--primary); }

.footer-bottom {
  margin-top: 3.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  font-size: 0.75rem;
  color: var(--muted-foreground);
}
.footer-bottom a:hover { color: var(--primary); }
.footer-bottom nav { display: flex; flex-wrap: wrap; gap: 1.25rem; }
@media (min-width: 640px) {
  .footer-bottom { flex-direction: row; align-items: center; justify-content: space-between; }
}

/* ---------------------------------------------------------- 10. page hero */

.page-hero {
  position: relative;
  overflow: hidden;
  background: var(--cream);
  padding-top: 8rem;
  padding-bottom: 4rem;
}
@media (min-width: 768px) {
  .page-hero { padding-top: 10rem; padding-bottom: 5rem; }
}
.page-hero .shell { position: relative; }
.page-hero__inner { display: flex; max-width: 48rem; flex-direction: column; align-items: flex-start; gap: 1.25rem; }
.page-hero h1 { font-size: clamp(2.4rem, 1.4rem + 3.4vw, 3.75rem); line-height: 1.05; }

/* ---------------------------------------------------------- 11. home hero */

.home-hero {
  position: relative;
  overflow: hidden;
  background: var(--cream);
  padding-top: 7rem;
  padding-bottom: 2.5rem;
}
@media (min-width: 768px) {
  .home-hero { padding-top: 9rem; padding-bottom: 4rem; }
}

.home-hero__grid { display: grid; gap: 3rem; align-items: center; }
@media (min-width: 1024px) {
  .home-hero__grid { grid-template-columns: 45fr 55fr; gap: 2rem; }
}

.home-hero__copy { display: flex; flex-direction: column; align-items: flex-start; gap: 1.75rem; order: 1; }
@media (min-width: 1024px) { .home-hero__copy { padding-right: 2.5rem; } }

.home-hero__keywords {
  display: flex;
  flex-wrap: wrap;
  column-gap: 0.75rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
}
@media (min-width: 640px) { .home-hero__keywords { font-size: 1.5rem; } }
.home-hero__keywords .k1 { color: var(--brand-orange); }
.home-hero__keywords .k2 { color: var(--accent); }
.home-hero__keywords .k3 { color: var(--coral); }
.home-hero__keywords .k4 { color: var(--primary); }

.hero-cta { display: flex; flex-direction: column; gap: 0.75rem; width: 100%; }
@media (min-width: 640px) { .hero-cta { flex-direction: row; width: auto; } }

/* interactive scene */
.scene { position: relative; order: 2; perspective: 1200px; }
.scene__stage {
  position: relative;
  touch-action: pan-y;
  cursor: grab;
  transform-style: preserve-3d;
  transition: transform 0.45s var(--ease);
  will-change: transform;
}
.scene__stage:active { cursor: grabbing; }
.scene__img {
  width: 100%;
  filter: drop-shadow(0 40px 45px oklch(0.3 0.05 220 / 0.18));
  user-select: none;
  -webkit-user-drag: none;
  animation: float-slow 9s ease-in-out infinite;
}
.scene__hint {
  position: absolute;
  top: -0.25rem;
  left: 0.25rem;
  z-index: 3;
  display: none;
  align-items: center;
  gap: 1rem;
  border: 1px solid color-mix(in oklab, var(--card) 60%, transparent);
  border-radius: 999px;
  background: color-mix(in oklab, var(--card) 60%, transparent);
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  color: var(--muted-foreground);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(18px);
  pointer-events: none;
}
.scene__hint span { display: inline-flex; align-items: center; gap: 0.375rem; }
.scene__hint svg { width: 0.875rem; height: 0.875rem; }
.scene__hint .i1 { color: var(--primary); }
.scene__hint .i2 { color: var(--accent); }
@media (min-width: 768px) { .scene__hint { display: flex; } }

.hotspot {
  position: absolute;
  border: 0;
  border-radius: 999px;
  background: transparent;
  padding: 0;
  transform: translate(-50%, -50%);
}
.hotspot::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: radial-gradient(circle, color-mix(in oklab, var(--brand-teal) 45%, transparent), transparent 70%);
  opacity: 0;
  transition: opacity 0.25s;
}
.hotspot:hover::after, .hotspot:focus-visible::after { opacity: 1; }
.hotspot__label {
  position: absolute;
  bottom: 100%;
  left: 50%;
  margin-bottom: 0.5rem;
  transform: translate(-50%, 6px) scale(0.95);
  border: 1px solid color-mix(in oklab, var(--border) 60%, transparent);
  border-radius: 999px;
  background: color-mix(in oklab, var(--card) 88%, transparent);
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: var(--shadow-lift);
  backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s var(--ease), transform 0.22s var(--ease);
}
.hotspot:hover .hotspot__label,
.hotspot:focus-visible .hotspot__label { opacity: 1; transform: translate(-50%, 0) scale(1); }

.scene__controls { margin-top: 1rem; display: flex; justify-content: center; }
.scene__controls > div {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  border: 1px solid color-mix(in oklab, var(--border) 60%, transparent);
  border-radius: 999px;
  background: color-mix(in oklab, var(--card) 70%, transparent);
  padding: 0.375rem 0.75rem;
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(8px);
}
.scene__controls button {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  color: color-mix(in oklab, var(--foreground) 70%, transparent);
  transition: background-color 0.2s, color 0.2s;
}
.scene__controls button:hover { background: color-mix(in oklab, var(--primary) 10%, transparent); color: var(--primary); }
.scene__controls svg { width: 1rem; height: 1rem; }

@keyframes float-slow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

/* feature strip */
.feature-strip { padding-bottom: 4rem; }
.feature-strip ul {
  display: grid;
  gap: 1.5rem;
  border: 1px solid color-mix(in oklab, var(--border) 70%, transparent);
  border-radius: 2rem;
  background: color-mix(in oklab, var(--card) 85%, transparent);
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(8px);
}
@media (min-width: 640px) {
  .feature-strip ul { grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 2rem; }
}
@media (min-width: 1024px) {
  .feature-strip ul { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .feature-strip li { padding-inline: 1rem; border-left: 1px solid color-mix(in oklab, var(--border) 70%, transparent); }
  .feature-strip li:first-child { border-left: 0; padding-left: 0; }
  .feature-strip li:last-child { padding-right: 0; }
}
.feature-strip li { display: flex; align-items: flex-start; gap: 0.75rem; }
.feature-strip .tile { width: 2.75rem; height: 2.75rem; border-radius: 999px; }
.feature-strip .tile svg { width: 1.25rem; height: 1.25rem; }
.feature-strip b { display: block; font-size: 0.875rem; font-weight: 600; }
.feature-strip p { margin-top: 0.125rem; font-size: 0.875rem; line-height: 1.4; color: var(--muted-foreground); }

/* ------------------------------------------------------ 12. age accordion */

.stage-list { display: flex; flex-direction: column; gap: 1rem; margin-top: 3.5rem; }

.stage {
  overflow: hidden;
  border: 2px solid var(--border);
  border-radius: 2rem;
  background: var(--card);
  transition: border-color 0.3s, box-shadow 0.3s;
}
.stage:hover { border-color: color-mix(in oklab, var(--primary) 25%, transparent); }
.stage[open] {
  border-color: color-mix(in oklab, var(--primary) 40%, transparent);
  box-shadow: var(--shadow-lift);
}

.stage > summary {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem;
  cursor: pointer;
  list-style: none;
}
.stage > summary::-webkit-details-marker { display: none; }
@media (min-width: 640px) { .stage > summary { gap: 2rem; padding: 2rem; } }

.stage__age {
  display: grid;
  place-items: center;
  flex: none;
  width: 4rem;
  height: 4rem;
  border-radius: var(--radius-md);
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
}
@media (min-width: 640px) { .stage__age { width: 5rem; height: 5rem; font-size: 1.5rem; } }

.stage__head { flex: 1; }
.stage__step { display: block; font-size: 0.75rem; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted-foreground); }
.stage__name { display: block; margin-top: 0.25rem; font-family: var(--font-display); font-size: 1.5rem; font-weight: 600; letter-spacing: -0.02em; }
@media (min-width: 640px) { .stage__name { font-size: 1.875rem; } }
.stage__line { display: block; margin-top: 0.375rem; font-size: 0.875rem; color: var(--muted-foreground); }
@media (min-width: 640px) { .stage__line { font-size: 1rem; } }

.stage__chev { flex: none; color: var(--muted-foreground); transition: transform 0.3s; }
.stage__chev svg { width: 1.25rem; height: 1.25rem; }
.stage[open] .stage__chev { transform: rotate(180deg); }

.stage__body {
  display: grid;
  gap: 2rem;
  border-top: 1px solid var(--border);
  padding: 1.75rem 1.5rem;
}
@media (min-width: 640px) { .stage__body { padding-inline: 2rem; } }
@media (min-width: 1024px) { .stage__body { grid-template-columns: repeat(3, minmax(0, 1fr)); } }

.dot-list { display: flex; flex-direction: column; gap: 0.5rem; font-size: 0.875rem; }
.dot-list li { display: flex; gap: 0.625rem; color: color-mix(in oklab, var(--foreground) 85%, transparent); }
.dot-list li::before {
  content: "";
  flex: none;
  margin-top: 0.5rem;
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 999px;
  background: var(--accent-solid, var(--primary));
}

.chip-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }

/* -------------------------------------------------------- 13. how it works */

.step-grid { display: grid; gap: 1rem; margin-top: 3.5rem; }
@media (min-width: 768px) { .step-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }

.step-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  border: 2px solid var(--border);
  border-radius: 2rem;
  background: var(--card);
  padding: 1.5rem;
  text-align: left;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.step-card:hover { transform: translateY(-4px); border-color: color-mix(in oklab, var(--primary) 25%, transparent); }
.step-card[aria-pressed="true"] {
  border-color: color-mix(in oklab, var(--primary) 45%, transparent);
  box-shadow: var(--shadow-lift);
  transform: none;
}
.step-card__title { font-family: var(--font-display); font-size: 1.5rem; font-weight: 600; letter-spacing: -0.02em; }
.step-card p { font-size: 0.875rem; line-height: 1.6; color: var(--muted-foreground); }

.step-detail {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 2rem;
  background: var(--card);
  padding: 1.75rem;
}
@media (min-width: 640px) {
  .step-detail { flex-direction: row; align-items: center; justify-content: space-between; gap: 2rem; }
}
.step-detail__outcome { font-family: var(--font-display); font-size: 1.125rem; font-weight: 600; color: var(--primary); }

/* ------------------------------------------------------------ 14. method */

.method-row {
  display: grid;
  gap: 1.25rem;
  border-top: 1px solid color-mix(in oklab, var(--background) 15%, transparent);
  padding-block: 2rem;
}
@media (min-width: 768px) {
  .method-row { grid-template-columns: 8rem 1fr 18rem; align-items: baseline; gap: 2.5rem; padding-block: 2.5rem; }
}
.method-row__num {
  font-family: var(--font-display);
  font-size: 2.25rem;
  color: color-mix(in oklab, var(--background) 35%, transparent);
}
@media (min-width: 768px) { .method-row__num { font-size: 3rem; } }
.method-row h3 { font-size: 1.5rem; }
@media (min-width: 768px) { .method-row h3 { font-size: 2.25rem; } }
.method-row p.body { margin-top: 0.75rem; max-width: 36rem; line-height: 1.7; color: color-mix(in oklab, var(--background) 70%, transparent); }
.method-row p.outcome {
  border: 1px solid color-mix(in oklab, var(--background) 15%, transparent);
  border-radius: var(--radius-md);
  background: color-mix(in oklab, var(--background) 5%, transparent);
  padding: 1rem;
  font-size: 0.875rem;
  color: color-mix(in oklab, var(--background) 80%, transparent);
}

/* ------------------------------------------------- 15. dashboard preview */

.dash {
  border: 1px solid var(--border);
  border-radius: 2.5rem;
  background: var(--surface);
  padding: 1.25rem;
  box-shadow: var(--shadow-lift);
}
@media (min-width: 640px) { .dash { padding: 1.75rem; } }

.dash__profile {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-3xl);
  background: var(--card);
  padding: 1.25rem;
}
.dash__avatar {
  display: grid;
  place-items: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  font-size: 1.5rem;
}
.dash__panel {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-3xl);
  background: var(--card);
  padding: 1.5rem;
}
.dash__stats { display: grid; gap: 1rem; margin-top: 1rem; }
@media (min-width: 640px) { .dash__stats { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.dash__stat {
  border: 1px solid var(--border);
  border-radius: var(--radius-3xl);
  background: var(--card);
  padding: 1.25rem;
}
.dash__stat .tile { width: 2.5rem; height: 2.5rem; border-radius: var(--radius-sm); }
.dash__stat .tile svg { width: 1.25rem; height: 1.25rem; }
.dash__stat b { display: block; margin-top: 0.75rem; font-family: var(--font-display); font-size: 1.875rem; font-weight: 600; }

.meter { margin-top: 0.5rem; height: 0.625rem; overflow: hidden; border-radius: 999px; background: var(--border); }
.meter > span {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--accent-solid, var(--primary));
  width: 0;
  transition: width 0.9s var(--ease);
}
.is-visible .meter > span { width: var(--value, 0%); }

.badge-row { display: flex; flex-wrap: wrap; gap: 0.625rem; margin-top: 1rem; }
.badge-row span {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
}

/* ------------------------------------------------------ 16. testimonials */

.quote-card { display: flex; flex-direction: column; height: 100%; gap: 1.25rem; }
.quote-card__top { display: flex; align-items: center; justify-content: space-between; }
.quote-card__mark { width: 2rem; height: 2rem; color: color-mix(in oklab, var(--primary) 30%, transparent); }
.stars { display: flex; gap: 0.125rem; color: var(--sun); }
.stars svg { width: 1rem; height: 1rem; fill: currentColor; }
.quote-card blockquote { flex: 1; line-height: 1.7; color: color-mix(in oklab, var(--foreground) 85%, transparent); }
.quote-card figcaption { display: flex; align-items: center; gap: 0.75rem; border-top: 1px solid var(--border); padding-top: 1rem; }
.avatar {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  flex: none;
  border-radius: 999px;
  background: var(--primary-soft);
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--primary);
}

/* --------------------------------------------------------- 17. demo panel */

.demo-cta { position: relative; overflow: hidden; background: var(--surface); }
.demo-cta > .shell { padding-block: 5rem; }
@media (min-width: 768px) { .demo-cta > .shell { padding-block: 7rem; } }

.demo-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 2.5rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  padding: 2rem;
  color: var(--primary-foreground);
}
@media (min-width: 640px) { .demo-panel { padding: 3.5rem; } }
.demo-panel__grid { position: relative; display: grid; gap: 2.5rem; }
@media (min-width: 1024px) { .demo-panel__grid { grid-template-columns: 1.1fr 0.9fr; align-items: center; } }
.demo-panel h2 { font-size: clamp(1.875rem, 1.1rem + 2.4vw, 3rem); line-height: 1.08; color: inherit; }
.demo-panel__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  align-self: flex-start;
  border-radius: 999px;
  background: color-mix(in oklab, var(--primary-foreground) 15%, transparent);
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.demo-panel__tag svg { width: 0.875rem; height: 0.875rem; }
.demo-panel__points { display: flex; flex-direction: column; gap: 0.625rem; }
.demo-panel__points li { display: flex; align-items: center; gap: 0.625rem; font-size: 0.875rem; }
.demo-panel__points span {
  display: grid;
  place-items: center;
  flex: none;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 999px;
  background: color-mix(in oklab, var(--primary-foreground) 20%, transparent);
}
.demo-panel__points svg { width: 0.75rem; height: 0.75rem; }
.demo-panel__card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border-radius: var(--radius-3xl);
  background: var(--card);
  padding: 1.75rem;
  color: var(--foreground);
  box-shadow: var(--shadow-lift);
}

/* ------------------------------------------------------------ 18. filters */

.filter-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 2rem;
  background: var(--card);
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
}

.search-field { position: relative; }
.search-field svg {
  position: absolute;
  left: 1rem;
  top: 50%;
  width: 1rem;
  height: 1rem;
  transform: translateY(-50%);
  color: var(--muted-foreground);
  pointer-events: none;
}
.search-field input { padding-left: 2.75rem; }

.field {
  width: 100%;
  height: 3rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  padding-inline: 1.125rem;
  font-size: 0.9375rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field:focus { border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in oklab, var(--primary) 18%, transparent); outline: none; }
.field--boxy { border-radius: var(--radius-md); }
textarea.field { height: auto; min-height: 6rem; border-radius: var(--radius-md); padding: 0.875rem 1.125rem; resize: vertical; }

.filter-row { display: flex; flex-direction: column; gap: 0.5rem; }
@media (min-width: 640px) { .filter-row { flex-direction: row; align-items: center; gap: 1rem; } }
.filter-row > .label { width: 5rem; flex: none; }

.chip {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  padding: 0.375rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: color-mix(in oklab, var(--foreground) 75%, transparent);
  transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}
.chip:hover { border-color: color-mix(in oklab, var(--primary) 40%, transparent); }
.chip[aria-pressed="true"] { border-color: var(--primary); background: var(--primary); color: var(--primary-foreground); }

.chip--lg { padding: 0.5rem 1rem; border-radius: 999px; }

.empty-state {
  display: grid;
  place-items: center;
  gap: 1rem;
  border: 1px dashed var(--border);
  border-radius: 2rem;
  background: var(--surface);
  padding: 3.5rem 1.5rem;
  text-align: center;
}
.empty-state svg { width: 2rem; height: 2rem; color: var(--muted-foreground); }

/* ------------------------------------------------- 19. media / thumbnails */

.thumb {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 1.5rem;
  background: linear-gradient(135deg, var(--primary-soft), color-mix(in oklab, var(--sky) 40%, transparent), color-mix(in oklab, var(--sun) 45%, transparent));
}
.thumb__play {
  display: grid;
  place-items: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 999px;
  background: color-mix(in oklab, var(--card) 90%, transparent);
  color: var(--primary);
  box-shadow: var(--shadow-soft);
  transition: transform 0.3s;
}
.card-link:hover .thumb__play { transform: scale(1.1); }
.thumb__play svg { width: 1.25rem; height: 1.25rem; }
.thumb__time {
  position: absolute;
  right: 0.75rem;
  bottom: 0.75rem;
  border-radius: 999px;
  background: color-mix(in oklab, var(--foreground) 80%, transparent);
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--background);
}

.cover {
  display: grid;
  place-items: center;
  aspect-ratio: 4 / 3;
  border-radius: 2rem;
  background: linear-gradient(135deg, var(--primary-soft), color-mix(in oklab, var(--sky) 40%, transparent), color-mix(in oklab, var(--sun) 40%, transparent));
  font-size: 3.75rem;
}

.program-art {
  display: grid;
  place-items: center;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--border);
  border-radius: 2.5rem;
  background: var(--accent-soft);
  color: var(--accent-ink);
  box-shadow: var(--shadow-lift);
}
.program-art svg { width: 6rem; height: 6rem; }

/* -------------------------------------------------------- 20. article body */

.prose { display: flex; flex-direction: column; gap: 1.25rem; max-width: 44rem; }
.prose p { line-height: 1.8; color: color-mix(in oklab, var(--foreground) 88%, transparent); }
.prose h2 { margin-top: 1rem; font-size: 1.75rem; }
.prose ul { display: flex; flex-direction: column; gap: 0.5rem; padding-left: 1.25rem; list-style: disc; }

.article-lead { font-family: var(--font-display); font-size: 1.25rem; line-height: 1.6; color: color-mix(in oklab, var(--foreground) 90%, transparent); }

.read-progress {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 55;
  height: 3px;
  transform-origin: left;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.legal-doc { display: flex; flex-direction: column; gap: 2rem; max-width: 48rem; margin-inline: auto; }
.legal-doc h2 { font-size: 1.5rem; }

/* ------------------------------------------------------ 21. activity play */

.player { position: relative; }
.player__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.player__track { display: flex; align-items: center; gap: 0.25rem; }
.player__track span { height: 0.375rem; width: 1.5rem; border-radius: 999px; background: var(--border); }
.player__track span.is-on { background: var(--primary); }

.player__prompt { margin-bottom: 1.5rem; font-size: 1.25rem; }
@media (min-width: 640px) { .player__prompt { font-size: 1.5rem; } }

.player__options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem; }
@media (min-width: 640px) { .player__options { gap: 1rem; } }

.option {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 6rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-3xl);
  background: var(--card);
  padding: 1.25rem;
  text-align: center;
  transition: border-color 0.2s, background-color 0.2s, transform 0.15s;
}
@media (min-width: 640px) { .option { min-height: 8rem; } }
.option:hover { border-color: color-mix(in oklab, var(--primary) 50%, transparent); background: color-mix(in oklab, var(--primary-soft) 50%, transparent); }
.option__face { font-family: var(--font-display); font-size: 1.875rem; font-weight: 600; }
@media (min-width: 640px) { .option__face { font-size: 2.25rem; } }
.option__face.sw-coral { color: var(--coral); }
.option__face.sw-sun { color: var(--sun); }
.option__face.sw-sky { color: var(--sky); }
.option__face.sw-leaf { color: var(--leaf); }
.option__face.sw-primary { color: var(--primary); }
.option__face.sw-accent { color: var(--accent); }

.option.is-correct { border-color: var(--leaf); background: color-mix(in oklab, var(--leaf) 25%, transparent); }
.option.is-wrong { border-color: color-mix(in oklab, var(--destructive) 60%, transparent); background: color-mix(in oklab, var(--destructive) 10%, transparent); animation: shake 0.4s; }
.option__mark {
  position: absolute;
  right: 0.75rem;
  top: 0.75rem;
  display: grid;
  place-items: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 999px;
}
.option.is-correct .option__mark { background: var(--leaf); color: var(--leaf-foreground); }
.option.is-wrong .option__mark { background: var(--destructive); color: var(--destructive-foreground); }
.option__mark svg { width: 1rem; height: 1rem; }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  50% { transform: translateX(8px); }
  75% { transform: translateX(-5px); }
}

.player__status { margin-top: 1.25rem; min-height: 2.5rem; }
.player__status .ok { font-weight: 600; color: var(--leaf-foreground); }
.player__status .no { font-weight: 600; color: var(--coral); }
.player__status .hint { font-size: 0.875rem; color: var(--muted-foreground); }

.player__done { display: grid; place-items: center; gap: 1.25rem; padding-block: 2.5rem; text-align: center; }
.player__done .big { font-size: 3rem; }
.player__done .stars svg { width: 1.5rem; height: 1.5rem; }
.player__done .stars .off { color: var(--border); }

.memory-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.75rem; }
@media (min-width: 640px) { .memory-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.memory-card {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card);
  font-size: 1.875rem;
  transition: border-color 0.2s, background-color 0.2s;
}
@media (min-width: 640px) { .memory-card { font-size: 2.25rem; } }
.memory-card:hover { border-color: color-mix(in oklab, var(--primary) 40%, transparent); }
.memory-card .back { color: color-mix(in oklab, var(--primary) 40%, transparent); }
.memory-card.is-flipped { border-color: color-mix(in oklab, var(--primary) 50%, transparent); background: var(--primary-soft); }
.memory-card.is-matched { border-color: var(--leaf); background: color-mix(in oklab, var(--leaf) 25%, transparent); }

.confetti { position: absolute; inset: 0; z-index: 10; display: grid; place-items: center; overflow: hidden; pointer-events: none; }
.confetti span { position: absolute; font-size: 1.5rem; opacity: 0; animation: pop 1.1s var(--ease) forwards; }

@keyframes pop {
  0% { opacity: 0; transform: translate(0, 10px) scale(0.5); }
  35% { opacity: 1; }
  100% { opacity: 0; transform: translate(var(--dx, 0), -140px) scale(1.1) rotate(var(--rot, 0deg)); }
}

/* ------------------------------------------------------- 22. demo wizard */

.wizard { max-width: 42rem; margin-inline: auto; width: 100%; }
.wizard__progress { display: flex; align-items: center; gap: 0.5rem; }
.wizard__progress > div { display: flex; flex: 1; flex-direction: column; gap: 0.5rem; }
.wizard__progress i {
  height: 0.375rem;
  border-radius: 999px;
  background: var(--secondary);
  transition: background-color 0.3s;
}
.wizard__progress .is-done i { background: var(--primary); }
.wizard__progress span { display: none; font-size: 0.75rem; font-weight: 500; color: var(--muted-foreground); }
@media (min-width: 640px) { .wizard__progress span { display: block; } }
.wizard__progress .is-current span { color: var(--primary); }

.wizard__card {
  margin-top: 2rem;
  border: 1px solid var(--border);
  border-radius: 2.5rem;
  background: var(--card);
  padding: 1.75rem;
  box-shadow: var(--shadow-soft);
}
@media (min-width: 640px) { .wizard__card { padding: 2.25rem; } }

.wizard__step { display: flex; flex-direction: column; gap: 1.25rem; animation: slide-in 0.25s var(--ease); }
.wizard__step[hidden] { display: none; }

@keyframes slide-in {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: none; }
}

.wizard__nav { margin-top: 2rem; display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; }

.age-pick { display: flex; flex-wrap: wrap; gap: 0.625rem; }
.age-pick button {
  width: 3.5rem;
  height: 3.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  font-size: 1.125rem;
  font-weight: 600;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}
.age-pick button:hover { border-color: color-mix(in oklab, var(--primary) 40%, transparent); }
.age-pick button[aria-pressed="true"] { border-color: var(--primary); background: var(--primary); color: var(--primary-foreground); }

.day-scroller { display: flex; gap: 0.5rem; overflow-x: auto; padding: 0 0.25rem 0.5rem; margin-inline: -0.25rem; }
.day-scroller button {
  flex: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
}
.day-scroller button[aria-pressed="true"] { border-color: var(--primary); background: var(--primary); color: var(--primary-foreground); }

.slot-grid { display: grid; gap: 0.625rem; grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (min-width: 640px) { .slot-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.slot-grid button {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  padding: 0.875rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
}
.slot-grid button:hover { border-color: color-mix(in oklab, var(--primary) 40%, transparent); }
.slot-grid button[aria-pressed="true"] { border-color: var(--primary); background: var(--primary-soft); }

.form-grid { display: grid; gap: 1rem; }
@media (min-width: 640px) { .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .form-grid .col-span-2 { grid-column: span 2; } }
.form-field { display: flex; flex-direction: column; gap: 0.5rem; }
.form-field > label { font-size: 0.875rem; font-weight: 500; }

.summary-list { display: grid; gap: 0.75rem; font-size: 0.875rem; }
.summary-list > div {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  border-radius: var(--radius-md);
  background: var(--surface);
  padding: 0.75rem 1rem;
}
.summary-list dd { font-weight: 500; }

.form-error { font-size: 0.875rem; font-weight: 500; color: var(--destructive); }

/* ------------------------------------------------------------ 23. faq */

.faq { display: flex; flex-direction: column; }
.faq > details { border-bottom: 1px solid var(--border); }
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1rem;
  cursor: pointer;
  font-weight: 500;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--primary); }
.faq summary svg { width: 1rem; height: 1rem; flex: none; color: var(--muted-foreground); transition: transform 0.25s; }
.faq details[open] summary svg { transform: rotate(180deg); }
.faq .faq__answer { padding-bottom: 1rem; font-size: 0.875rem; line-height: 1.7; color: var(--muted-foreground); }

/* ---------------------------------------------------------- 24. utilities */

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-baseline { align-items: baseline; }
.items-end { align-items: flex-end; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: 0.5rem; } .gap-3 { gap: 0.75rem; } .gap-4 { gap: 1rem; } .gap-5 { gap: 1.25rem; } .gap-6 { gap: 1.5rem; }
.mt-2 { margin-top: 0.5rem; } .mt-3 { margin-top: 0.75rem; } .mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; } .mt-8 { margin-top: 2rem; } .mt-10 { margin-top: 2.5rem; } .mt-12 { margin-top: 3rem; } .mt-14 { margin-top: 3.5rem; }
.mt-auto { margin-top: auto; }
.text-center { text-align: center; }
.w-fit { width: fit-content; }
.max-w-prose { max-width: 44rem; }
.max-w-md { max-width: 28rem; }
.full { width: 100%; }
.relative { position: relative; }
.grow { flex: 1; }
.font-semibold { font-weight: 600; }
.leading-relaxed { line-height: 1.7; }
.emoji-lg { font-size: 1.5rem; line-height: 1; }
.note {
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  padding: 1.25rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

/* --------------------------------------------------- 25. scroll reveal */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

.no-js .reveal { opacity: 1; transform: none; }
.no-js .meter > span { width: var(--value, 0%); }
.no-js .mobile-menu { display: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .scene__img { animation: none; }
}

/* -------------------------------------------------------------- 26. print */

@media print {
  .site-header, .site-footer, .demo-cta, .scene__controls, .nav-toggle { display: none !important; }
  body { background: #fff; }
  .section > .shell { padding-block: 1rem; }
}