/* Dileya landing — brand tokens from docs/store/BRAND.md:
   violet #8B5CF6, coral #F4694C, ink #131020. Nunito is bundled (same faces
   the Flutter app uses in mobile/assets/fonts), never fetched from a CDN. */

/* ── Fonts ──────────────────────────────────────────────────────────── */
@font-face {
  font-family: 'Nunito';
  src: url('../fonts/Nunito-Regular.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Nunito';
  src: url('../fonts/Nunito-Bold.woff2') format('woff2');
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Nunito';
  src: url('../fonts/Nunito-ExtraBold.woff2') format('woff2');
  font-weight: 800; font-style: normal; font-display: swap;
}

/* ── Tokens ─────────────────────────────────────────────────────────── */
:root {
  --violet: #8B5CF6;        /* brand accent: borders, glows, decoration */
  /* Brand violet under white text is only 4.23:1 — below WCAG AA. Anything
     filled violet WITH white text uses --violet-deep (5.99:1) instead. */
  --violet-deep: #6D3EE8;
  --violet-deeper: #5E2FD8; /* hover/pressed */
  --coral: #F4694C;
  --ink: #131020;

  --bg: #FFFFFF;
  --bg-alt: #F6F4FC;
  --surface: #FFFFFF;
  --border: #E6E1F2;
  --text: var(--ink);
  --text-soft: #574F70;
  --shadow: 0 1px 2px rgb(19 16 32 / 6%), 0 8px 24px rgb(19 16 32 / 6%);

  --radius: 16px;
  --radius-lg: 24px;
  --wrap: 1200px;
  --wrap-narrow: 760px;
  --pad: clamp(16px, 4vw, 32px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0E0C18;
    --bg-alt: #161227;
    --surface: #1A1630;
    --border: #2C2545;
    --text: #F3F1FA;
    --text-soft: #ABA3C6;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 12px 32px rgb(0 0 0 / 35%);
  }
}

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

html { scroll-behavior: smooth; scroll-padding-top: 88px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Nunito', system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: clamp(16px, 1rem + .15vw, 18px);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; font-weight: 800; letter-spacing: -.02em; }
h1 { font-size: clamp(2rem, 1.4rem + 3vw, 3.75rem); }
h2 { font-size: clamp(1.5rem, 1.15rem + 1.6vw, 2.5rem); }
h3 { font-size: clamp(1.125rem, 1.05rem + .4vw, 1.375rem); }
p  { margin: 0 0 1em; }
img { max-width: 100%; height: auto; display: block; }

a { color: var(--violet-deep); text-decoration-thickness: 1px; text-underline-offset: 3px; }
@media (prefers-color-scheme: dark) { a { color: #B79CFF; } }

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

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--pad); }
.wrap-narrow { max-width: var(--wrap-narrow); }
.center { text-align: center; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--violet-deep); color: #fff; padding: 12px 20px; border-radius: 0 0 12px 0;
}
.skip-link:focus { left: 0; }

/* ── Header ─────────────────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; gap: clamp(12px, 2vw, 28px);
  min-height: 72px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; flex: 0 0 auto; }
.brand-logo { width: 128px; height: 40px; object-fit: contain; object-position: left center; }

.nav { display: flex; gap: clamp(10px, 1.6vw, 24px); flex: 1 1 auto; flex-wrap: wrap; }
.nav a {
  color: var(--text-soft); text-decoration: none; font-weight: 700;
  font-size: .95rem; padding: 6px 2px; border-bottom: 2px solid transparent;
}
.nav a:hover { color: var(--text); border-bottom-color: var(--violet); }

.header-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }

.langs { display: flex; gap: 2px; background: var(--bg-alt); border: 1px solid var(--border); border-radius: 999px; padding: 3px; }
.lang {
  appearance: none; border: 0; background: transparent; cursor: pointer;
  font: inherit; font-weight: 700; font-size: .8rem; letter-spacing: .02em;
  color: var(--text-soft); padding: 5px 9px; border-radius: 999px; min-width: 36px;
}
.lang:hover { color: var(--text); }
.lang[aria-pressed="true"] { background: var(--violet-deep); color: #fff; }

/* ── Buttons ────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 800; text-decoration: none; cursor: pointer;
  border-radius: 999px; border: 2px solid transparent;
  padding: 12px 22px; transition: transform .12s ease, box-shadow .12s ease, background-color .12s ease;
  white-space: nowrap;
}
.btn-sm { padding: 8px 16px; font-size: .9rem; }
.btn-lg { padding: 15px 32px; font-size: 1.05rem; }
.btn-primary { background: var(--violet-deep); color: #fff; box-shadow: 0 6px 18px rgb(109 62 232 / 32%); }
.btn-primary:hover { background: var(--violet-deeper); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--violet); color: var(--violet-deep); }
@media (prefers-color-scheme: dark) { .btn-ghost:hover { color: #B79CFF; } }
/* Before main.js wires the real target the CTA is not yet a link. */
.btn[data-cta]:not([href]) { cursor: default; opacity: .9; }

/* ── Hero ───────────────────────────────────────────────────────────── */
.hero {
  padding: clamp(40px, 7vw, 96px) 0 clamp(32px, 5vw, 72px);
  text-align: center;
  background:
    radial-gradient(60% 55% at 50% 0%, color-mix(in srgb, var(--violet) 16%, transparent), transparent 70%),
    radial-gradient(40% 40% at 85% 15%, color-mix(in srgb, var(--coral) 12%, transparent), transparent 70%);
}
.hero-inner { display: flex; flex-direction: column; align-items: center; }
.hero-lockup { width: min(280px, 62vw); height: auto; margin: 0 0 clamp(16px, 3vw, 28px); }
.hero h1 { max-width: 18ch; }
.hero-sub { font-size: clamp(1.05rem, 1rem + .5vw, 1.3rem); color: var(--text-soft); max-width: 56ch; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; margin: 8px 0 12px; }
.hero-note { font-size: .9rem; color: var(--text-soft); margin: 0; }
.noscript-note {
  margin-top: 12px; padding: 10px 16px; border-radius: var(--radius);
  background: color-mix(in srgb, var(--coral) 14%, transparent); color: var(--text);
}

.badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .85rem; font-weight: 700; color: var(--text-soft);
  background: var(--surface); border: 1px solid var(--border);
  padding: 6px 14px; border-radius: 999px; margin: 0 0 clamp(16px, 3vw, 24px);
  box-shadow: var(--shadow);
}
.badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--coral); flex: 0 0 auto; }

/* ── Sections ───────────────────────────────────────────────────────── */
.section { padding: clamp(48px, 7vw, 104px) 0; }
.section-alt { background: var(--bg-alt); }
.section > .wrap > h2 { text-align: center; }
.section-sub {
  text-align: center; color: var(--text-soft); max-width: 60ch;
  margin: -.2em auto clamp(28px, 4vw, 48px); font-size: 1.05rem;
}
.section > .wrap > h2:last-of-type + .grid { margin-top: clamp(28px, 4vw, 48px); }

.grid { display: grid; gap: clamp(16px, 2.2vw, 28px); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); }
@media (min-width: 1800px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: clamp(20px, 2.4vw, 32px);
  box-shadow: var(--shadow);
}
.card h3 { margin-bottom: .35em; }
.card p { color: var(--text-soft); margin: 0; }

/* Benefit blocks: tutor art as a soft round motif. */
.benefit { display: flex; flex-direction: column; }
.benefit-art {
  width: 96px; height: 96px; border-radius: 50%; object-fit: cover; object-position: 50% 12%;
  background: color-mix(in srgb, var(--violet) 12%, transparent);
  margin-bottom: 16px;
}

/* Tutors */
.tutor { text-align: center; display: flex; flex-direction: column; align-items: center; }
.tutor img {
  width: 100%; max-width: 190px; height: auto; aspect-ratio: 3 / 4; object-fit: cover;
  border-radius: var(--radius); margin-bottom: 14px;
  background: color-mix(in srgb, var(--violet) 10%, transparent);
}
.tutor h3 { margin-bottom: .1em; }
.tutor .accent { font-weight: 700; color: var(--violet-deep); font-size: .9rem; margin-bottom: .15em; }
@media (prefers-color-scheme: dark) { .tutor .accent { color: #B79CFF; } }
.tutor .vibe { font-size: .92rem; }

/* Steps */
.steps { list-style: none; padding: 0; margin: 0; counter-reset: step; }
.step { position: relative; padding-top: clamp(28px, 3vw, 36px); }
.step-n {
  position: absolute; top: clamp(-18px, -1.4vw, -14px); left: clamp(20px, 2.4vw, 32px);
  width: 44px; height: 44px; display: grid; place-items: center;
  background: var(--violet-deep); color: #fff; font-weight: 800; font-size: 1.15rem;
  border-radius: 50%; box-shadow: 0 6px 16px rgb(109 62 232 / 35%);
}

/* Stats */
.stats {
  display: grid; gap: clamp(12px, 2vw, 24px); margin: clamp(32px, 4vw, 48px) 0 0;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
}
.stat {
  text-align: center; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 16px;
}
.stat dt { color: var(--text-soft); font-size: .9rem; order: 2; }
.stat dd {
  margin: 0; order: 1; font-weight: 800; font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.25rem);
  color: var(--violet-deep); line-height: 1.15;
}
@media (prefers-color-scheme: dark) { .stat dd { color: #B79CFF; } }
.stat { display: flex; flex-direction: column; }

/* FAQ */
.faq {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: 12px; overflow: hidden;
}
.faq summary {
  cursor: pointer; font-weight: 700; padding: 18px clamp(16px, 2vw, 24px);
  list-style: none; display: flex; align-items: center; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: '+'; margin-left: auto; font-size: 1.5rem; font-weight: 700;
  color: var(--violet); line-height: 1; transition: transform .15s ease;
}
.faq[open] summary::after { content: '\2212'; }
.faq summary:hover { color: var(--violet-deep); }
@media (prefers-color-scheme: dark) { .faq summary:hover { color: #B79CFF; } }
.faq p { padding: 0 clamp(16px, 2vw, 24px) 18px; margin: 0; color: var(--text-soft); }

/* Final CTA band */
.cta-band {
  background:
    radial-gradient(70% 100% at 50% 0%, color-mix(in srgb, var(--violet) 18%, transparent), transparent 75%),
    var(--bg-alt);
}
.cta-band p { color: var(--text-soft); margin-bottom: 1.5em; }

/* ── Footer ─────────────────────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--border); background: var(--bg); padding: clamp(40px, 5vw, 64px) 0 24px; }
.footer-inner {
  display: grid; gap: clamp(24px, 4vw, 48px);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
}
.footer-brand img { width: 128px; height: 40px; object-fit: contain; object-position: left center; }
.footer-tag { color: var(--text-soft); font-size: .95rem; margin-top: 12px; max-width: 32ch; }
.footer-col { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.footer-col h2 { font-size: .8rem; text-transform: uppercase; letter-spacing: .09em; color: var(--text-soft); margin: 0 0 4px; }
.footer-col a { color: var(--text); text-decoration: none; font-weight: 700; font-size: .95rem; }
.footer-col a:hover { color: var(--violet-deep); text-decoration: underline; }
@media (prefers-color-scheme: dark) { .footer-col a:hover { color: #B79CFF; } }
.footer-social { color: var(--text-soft); font-size: .9rem; margin: 4px 0 0; line-height: 1.9; }

.footer-bottom {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  margin-top: clamp(32px, 4vw, 48px); padding-top: 20px; border-top: 1px solid var(--border);
}
.footer-bottom p { color: var(--text-soft); font-size: .85rem; margin: 0; }

/* ── Narrow screens (360px floor) ───────────────────────────────────── */
@media (max-width: 860px) {
  .header-inner { min-height: 64px; padding-block: 10px; }
  .nav { order: 3; width: 100%; flex: 1 0 100%; justify-content: space-between; gap: 6px; overflow-x: auto; padding-bottom: 2px; }
  .nav a { font-size: .85rem; white-space: nowrap; }
  .header-actions { margin-left: auto; }
}
@media (max-width: 420px) {
  .header-actions .btn-sm { padding: 8px 12px; font-size: .82rem; }
  .lang { padding: 5px 7px; min-width: 32px; font-size: .75rem; }
  .hero-cta .btn { width: 100%; }
}

/* ── Legal sub-pages ────────────────────────────────────────────────── */
.doc { padding: clamp(32px, 5vw, 64px) 0 clamp(48px, 6vw, 80px); }
.doc h1 { font-size: clamp(1.75rem, 1.4rem + 1.6vw, 2.5rem); }
.doc h2 { font-size: clamp(1.2rem, 1.1rem + .6vw, 1.5rem); text-align: left; margin-top: 1.6em; }
.doc h3 { font-size: 1.05rem; margin-top: 1.3em; }
.doc ul, .doc ol { color: var(--text-soft); padding-left: 1.3em; }
.doc li { margin-bottom: .4em; }
.doc p { color: var(--text-soft); }
.doc .back { display: inline-block; margin-bottom: 24px; font-weight: 700; text-decoration: none; }
.doc .back:hover { text-decoration: underline; }
.doc-note {
  background: color-mix(in srgb, var(--coral) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--coral) 35%, transparent);
  border-radius: var(--radius); padding: 14px 18px; color: var(--text);
}