/* ════════════════════════════════════════════════════════════════
   FRENZA — French Alphabet landing experience
   Standalone, SEO-first, richly animated. Relies on tokens from
   design-system.css (loaded first). Progressive enhancement only —
   all content is server-rendered; JS adds audio + motion.
   ════════════════════════════════════════════════════════════════ */

:root {
  --alpha-nav-h: 72px;
  --alpha-surface:
    linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.012)),
    rgba(11, 11, 18, 0.62);
  --alpha-surface-hover:
    linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.02)),
    rgba(16, 16, 26, 0.76);
  --alpha-border: rgba(255, 255, 255, 0.08);
  --alpha-bevel: inset 0 1px 0 rgba(255, 255, 255, 0.07);
  --alpha-lift: 0 1px 2px rgba(0, 0, 0, 0.3), 0 14px 34px -18px rgba(0, 0, 0, 0.85);
  --alpha-lift-hover:
    0 1px 2px rgba(0, 0, 0, 0.3),
    0 26px 55px -22px rgba(124, 58, 237, 0.55),
    0 0 70px -30px rgba(34, 211, 238, 0.45);
}

.alpha-body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ── Shared shell ──────────────────────────────────────────────── */
.alpha-wrap { max-width: 1240px; margin: 0 auto; padding: 0 var(--space-lg); }
.alpha-section { padding: clamp(2rem, 4vw, 3.25rem) 0; position: relative; }
.alpha-section:first-of-type { padding-top: clamp(1rem, 2.5vw, 2rem); }
.alpha-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: var(--radius-full);
  background: rgba(139, 92, 246, 0.1); border: 1px solid rgba(139, 92, 246, 0.25);
  color: var(--primary-light);
  font-size: 12px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  font-family: var(--font-mono);
}
.alpha-h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.7rem, 3.6vw, 2.6rem); font-weight: 800; line-height: 1.1;
  margin: var(--space-md) 0 var(--space-sm); letter-spacing: -0.02em;
}
.alpha-lead { color: var(--text-secondary); font-size: clamp(1rem, 1.4vw, 1.12rem); line-height: 1.65; max-width: 62ch; }
.alpha-grad-text {
  background: var(--gradient-text); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ── Nav ───────────────────────────────────────────────────────── */
.alpha-nav {
  position: fixed; inset: 0 0 auto 0; height: var(--alpha-nav-h); z-index: 1000;
  display: flex; align-items: center;
  background: rgba(7, 7, 12, 0.72);
  backdrop-filter: blur(18px) saturate(160%); -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--alpha-border);
}
.alpha-nav-inner { max-width: 1240px; margin: 0 auto; padding: 0 var(--space-lg); width: 100%; display: flex; align-items: center; gap: var(--space-lg); }
.alpha-logo { display: flex; align-items: center; gap: 9px; font-family: var(--font-heading); font-weight: 800; font-size: 19px; color: var(--text-primary); text-decoration: none; }
.alpha-logo img { height: 30px; width: 30px; border-radius: var(--radius-sm); object-fit: cover; }
.alpha-nav-links { display: flex; gap: var(--space-md); margin-inline-start: auto; align-items: center; }
.alpha-nav-links a { color: var(--text-secondary); text-decoration: none; font-size: 14px; font-weight: 600; padding: 8px 12px; border-radius: var(--radius-sm); transition: color .2s, background .2s; }
.alpha-nav-links a:hover { color: var(--text-primary); background: rgba(255, 255, 255, 0.05); }
.alpha-nav-links a.current { color: var(--primary-light); }

/* Language switcher — real links to alternate URLs (SEO + UX) */
.alpha-lang { position: relative; }
.alpha-lang-btn {
  display: flex; align-items: center; gap: 7px; cursor: pointer;
  background: rgba(255, 255, 255, 0.04); border: 1px solid var(--alpha-border);
  color: var(--text-primary); border-radius: var(--radius-full); padding: 7px 13px;
  font-size: 13px; font-weight: 600; font-family: var(--font-body); transition: all .2s;
}
.alpha-lang-btn:hover { background: rgba(255, 255, 255, 0.08); border-color: var(--surface-border-hover); }
.alpha-lang-menu {
  position: absolute; top: calc(100% + 8px); inset-inline-end: 0;
  background: rgba(18, 18, 26, 0.97); backdrop-filter: blur(20px);
  border: 1px solid var(--alpha-border); border-radius: var(--radius-md);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.6); min-width: 190px; max-height: 320px; overflow-y: auto;
  padding: 6px; opacity: 0; pointer-events: none; transform: translateY(-8px) scale(.97);
  transition: opacity .25s, transform .25s; z-index: 1200;
  scrollbar-width: thin; scrollbar-color: rgba(255,255,255,.14) transparent;
}
.alpha-lang-menu.open { opacity: 1; pointer-events: auto; transform: translateY(0) scale(1); }
.alpha-lang-menu a { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: var(--radius-sm); color: var(--text-secondary); text-decoration: none; font-size: 13.5px; font-weight: 600; transition: background .15s, color .15s; }
.alpha-lang-menu a:hover { background: rgba(255, 255, 255, 0.06); color: var(--text-primary); }
.alpha-lang-menu a.active { background: rgba(139, 92, 246, 0.14); color: var(--primary-light); }
.alpha-lang-menu::-webkit-scrollbar { width: 6px; }
.alpha-lang-menu::-webkit-scrollbar-thumb { background: rgba(255,255,255,.14); border-radius: 999px; }

/* ── Hero ──────────────────────────────────────────────────────── */
.alpha-hero { position: relative; padding-top: calc(var(--alpha-nav-h) + clamp(1.25rem, 3vw, 2.25rem)); padding-bottom: clamp(1.25rem, 3vw, 2.25rem); overflow: hidden; }
.alpha-hero-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.alpha-blob { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.5; animation: alphaFloat 18s ease-in-out infinite; }
.alpha-blob.b1 { width: 460px; height: 460px; background: radial-gradient(circle, #8b5cf6, transparent 70%); top: -120px; inset-inline-start: -80px; }
.alpha-blob.b2 { width: 520px; height: 520px; background: radial-gradient(circle, #06b6d4, transparent 70%); top: -60px; inset-inline-end: -120px; animation-delay: -6s; }
.alpha-blob.b3 { width: 380px; height: 380px; background: radial-gradient(circle, #ec4899, transparent 70%); bottom: -160px; inset-inline-start: 30%; animation-delay: -11s; opacity: 0.35; }
@keyframes alphaFloat { 0%,100% { transform: translate(0,0) scale(1); } 33% { transform: translate(30px,-24px) scale(1.06); } 66% { transform: translate(-20px,18px) scale(0.96); } }

/* floating ghost letters */
.alpha-ghosts { position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.alpha-ghost { position: absolute; font-family: var(--font-heading); font-weight: 800; color: rgba(255,255,255,0.028); user-select: none; animation: alphaRise 22s linear infinite; }
@keyframes alphaRise { 0% { transform: translateY(30px) rotate(-8deg); opacity: 0; } 15% { opacity: 1; } 85% { opacity: 1; } 100% { transform: translateY(-40px) rotate(8deg); opacity: 0; } }

.alpha-hero-inner { position: relative; z-index: 1; max-width: 900px; }
.alpha-h1 {
  font-family: var(--font-heading); font-weight: 800;
  font-size: clamp(2.4rem, 6vw, 4.4rem); line-height: 1.04; letter-spacing: -0.03em;
  margin: var(--space-md) 0 var(--space-sm);
}
.alpha-hero-sub { color: var(--text-secondary); font-size: clamp(1.02rem, 1.7vw, 1.28rem); line-height: 1.6; max-width: 60ch; }
.alpha-cta-row { display: flex; flex-wrap: wrap; gap: var(--space-md); margin-top: var(--space-lg); }
.alpha-btn {
  display: inline-flex; align-items: center; gap: 9px; cursor: pointer; text-decoration: none;
  padding: 13px 24px; border-radius: var(--radius-full); font-weight: 700; font-size: 15px;
  font-family: var(--font-body); border: 1px solid transparent; transition: transform .2s, box-shadow .2s, background .2s;
}
.alpha-btn .material-icons-outlined { font-size: 19px; }
.alpha-btn-primary { background: var(--gradient-primary); color: #fff; box-shadow: 0 14px 30px -12px rgba(139, 92, 246, 0.9); }
.alpha-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 20px 42px -14px rgba(139, 92, 246, 1); }
.alpha-btn-ghost { background: rgba(255, 255, 255, 0.05); border-color: var(--alpha-border); color: var(--text-primary); }
.alpha-btn-ghost:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-2px); }

.alpha-stats { display: flex; flex-wrap: wrap; gap: var(--space-md); margin-top: var(--space-lg); }
.alpha-stat { display: flex; flex-direction: column; gap: 2px; padding: 14px 22px; background: var(--alpha-surface); border: 1px solid var(--alpha-border); border-radius: var(--radius-lg); box-shadow: var(--alpha-bevel); }
.alpha-stat b { font-family: var(--font-heading); font-size: 1.7rem; font-weight: 800; }
.alpha-stat span { font-size: 12.5px; color: var(--text-muted); font-weight: 600; letter-spacing: 0.02em; }

/* ── Toolbar ───────────────────────────────────────────────────── */
.alpha-toolbar { display: flex; flex-wrap: wrap; gap: var(--space-md); align-items: center; margin-bottom: var(--space-xl); }
.alpha-search { position: relative; flex: 1; min-width: 220px; }
.alpha-search .material-icons-outlined { position: absolute; inset-inline-start: 14px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 20px; pointer-events: none; }
.alpha-search input {
  width: 100%; padding: 13px 16px 13px 46px; border-radius: var(--radius-full);
  background: var(--alpha-surface); border: 1px solid var(--alpha-border); color: var(--text-primary);
  font-family: var(--font-body); font-size: 14.5px; outline: none; transition: border-color .2s, box-shadow .2s;
}
[dir="rtl"] .alpha-search input { padding: 13px 46px 13px 16px; }
.alpha-search input:focus { border-color: rgba(139, 92, 246, 0.55); box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.12); }
.alpha-search input::placeholder { color: var(--text-muted); }
.alpha-hint { display: inline-flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--text-muted); }
.alpha-hint .material-icons-outlined { font-size: 16px; color: var(--primary-light); }

/* ── Alphabet grid ─────────────────────────────────────────────── */
.alpha-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(178px, 1fr)); gap: var(--space-md); }
.alpha-card {
  position: relative; display: flex; flex-direction: column; gap: 10px;
  padding: 18px; border-radius: var(--radius-lg); cursor: pointer; text-align: start;
  background: var(--alpha-surface); border: 1px solid var(--alpha-border);
  box-shadow: var(--alpha-bevel), var(--alpha-lift);
  transition: transform .28s cubic-bezier(.2,1,.3,1), box-shadow .28s, border-color .28s, background .28s;
  -webkit-tap-highlight-color: transparent;
}
.alpha-card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: linear-gradient(135deg, rgba(139,92,246,0.5), rgba(34,211,238,0.35));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .28s;
}
.alpha-card:hover { transform: translateY(-6px); background: var(--alpha-surface-hover); box-shadow: var(--alpha-bevel), var(--alpha-lift-hover); border-color: transparent; }
.alpha-card:hover::before { opacity: 1; }
.alpha-card.playing { transform: translateY(-4px) scale(1.015); border-color: transparent; box-shadow: var(--alpha-bevel), 0 0 0 2px rgba(139,92,246,0.55), var(--alpha-lift-hover); }
.alpha-card.playing::before { opacity: 1; }
.alpha-card:focus-visible { outline: 2px solid var(--primary-light); outline-offset: 3px; }

.alpha-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.alpha-letter { font-family: var(--font-heading); font-weight: 800; font-size: 2.9rem; line-height: 1; letter-spacing: -0.02em; }
.alpha-card:hover .alpha-letter, .alpha-card.playing .alpha-letter { background: var(--gradient-vibrant); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.alpha-lower { font-size: 1rem; color: var(--text-muted); font-weight: 600; margin-inline-start: 4px; }
.alpha-ipa { align-self: flex-start; font-family: var(--font-mono); font-size: 12px; font-weight: 600; color: var(--primary-light); background: rgba(139,92,246,0.1); border: 1px solid rgba(139,92,246,0.2); border-radius: var(--radius-full); padding: 3px 9px; white-space: nowrap; }

.alpha-example { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: auto; padding-top: 10px; border-top: 1px solid var(--alpha-border); }
.alpha-example-text { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.alpha-example-fr { font-weight: 700; font-size: 14px; color: var(--text-primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.alpha-example-tr { font-size: 12px; color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.alpha-speak {
  flex: none; display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: var(--radius-full); cursor: pointer;
  background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--primary-light); transition: all .2s;
}
.alpha-speak .material-icons-outlined { font-size: 18px; }
.alpha-speak:hover { background: var(--gradient-primary); border-color: transparent; color: #fff; transform: scale(1.08); box-shadow: 0 5px 16px -4px rgba(139,92,246,0.9); }
.alpha-speak:active { transform: scale(0.92); }

/* reveal-on-scroll (JS toggles .in) */
.alpha-reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s cubic-bezier(.2,1,.3,1), transform .6s cubic-bezier(.2,1,.3,1); }
.alpha-reveal.in { opacity: 1; transform: none; }

.alpha-empty { grid-column: 1 / -1; text-align: center; color: var(--text-muted); padding: var(--space-2xl); font-size: 15px; }

/* ── Feature cards (accents / sounds) ──────────────────────────── */
.alpha-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: var(--space-md); margin-top: var(--space-xl); }
.alpha-feature {
  padding: 22px; border-radius: var(--radius-lg); background: var(--alpha-surface);
  border: 1px solid var(--alpha-border); box-shadow: var(--alpha-bevel), var(--alpha-lift);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.alpha-feature:hover { transform: translateY(-4px); box-shadow: var(--alpha-bevel), var(--alpha-lift-hover); border-color: rgba(139,92,246,0.3); }
.alpha-feature-head { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.alpha-glyph {
  flex: none; display: flex; align-items: center; justify-content: center; min-width: 52px; height: 52px; padding: 0 10px;
  border-radius: var(--radius-md); background: linear-gradient(135deg, rgba(139,92,246,0.18), rgba(34,211,238,0.12));
  border: 1px solid rgba(139,92,246,0.25); font-family: var(--font-heading); font-weight: 800; font-size: 1.6rem; color: var(--primary-light);
}
.alpha-feature h3 { font-family: var(--font-heading); font-size: 1.05rem; font-weight: 700; margin: 0; }
.alpha-feature-sub { font-size: 12.5px; color: var(--text-muted); font-weight: 600; }
.alpha-feature p { color: var(--text-secondary); font-size: 14px; line-height: 1.6; margin: 0; }
.alpha-sample { margin-top: 12px; }
.alpha-sample-btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  background: rgba(255,255,255,0.04); border: 1px solid var(--alpha-border); border-radius: var(--radius-full);
  padding: 7px 14px; color: var(--text-primary); font-family: var(--font-body); font-size: 13px; font-weight: 600; transition: all .2s;
}
.alpha-sample-btn .material-icons-outlined { font-size: 16px; color: var(--primary-light); }
.alpha-sample-btn:hover { background: var(--gradient-primary); border-color: transparent; color: #fff; }
.alpha-sample-btn:hover .material-icons-outlined { color: #fff; }

/* ── Tips ──────────────────────────────────────────────────────── */
.alpha-tips { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--space-md); margin-top: var(--space-xl); }
.alpha-tip { display: flex; gap: 14px; padding: 20px; border-radius: var(--radius-lg); background: var(--alpha-surface); border: 1px solid var(--alpha-border); box-shadow: var(--alpha-bevel); }
.alpha-tip-num { flex: none; width: 34px; height: 34px; border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center; background: var(--gradient-primary); color: #fff; font-family: var(--font-heading); font-weight: 800; font-size: 15px; }
.alpha-tip h3 { font-size: 15px; font-weight: 700; margin: 0 0 5px; }
.alpha-tip p { font-size: 13.5px; color: var(--text-secondary); line-height: 1.55; margin: 0; }

/* ── FAQ ───────────────────────────────────────────────────────── */
.alpha-faq { margin-top: var(--space-xl); display: flex; flex-direction: column; gap: 12px; max-width: 820px; }
.alpha-faq details {
  background: var(--alpha-surface); border: 1px solid var(--alpha-border); border-radius: var(--radius-lg);
  padding: 4px 20px; box-shadow: var(--alpha-bevel); transition: border-color .2s, background .2s;
}
.alpha-faq details[open] { border-color: rgba(139,92,246,0.3); background: var(--alpha-surface-hover); }
.alpha-faq summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 16px 0; font-weight: 700; font-size: 15.5px; color: var(--text-primary);
}
.alpha-faq summary::-webkit-details-marker { display: none; }
.alpha-faq summary .material-icons-outlined { flex: none; color: var(--primary-light); transition: transform .3s; }
.alpha-faq details[open] summary .material-icons-outlined { transform: rotate(180deg); }
.alpha-faq-a { color: var(--text-secondary); font-size: 14.5px; line-height: 1.7; padding: 0 0 18px; margin: 0; }

/* ── CTA band ──────────────────────────────────────────────────── */
.alpha-band { position: relative; overflow: hidden; margin: 0 var(--space-lg); border-radius: var(--radius-xl); }
.alpha-band-inner { position: relative; z-index: 1; text-align: center; padding: clamp(2.5rem, 6vw, 4.5rem) var(--space-lg); background: linear-gradient(135deg, rgba(139,92,246,0.16), rgba(34,211,238,0.1)); border: 1px solid rgba(139,92,246,0.28); border-radius: var(--radius-xl); }
.alpha-band h2 { font-family: var(--font-heading); font-size: clamp(1.6rem, 3.4vw, 2.4rem); font-weight: 800; margin: 0 0 12px; }
.alpha-band p { color: var(--text-secondary); font-size: 1.05rem; max-width: 52ch; margin: 0 auto var(--space-lg); line-height: 1.6; }

/* ── Footer (minimal, localized) ───────────────────────────────── */
.alpha-footer { border-top: 1px solid var(--alpha-border); padding: var(--space-2xl) 0; margin-top: var(--space-2xl); }
.alpha-footer-inner { display: flex; flex-wrap: wrap; gap: var(--space-lg); align-items: center; justify-content: space-between; }
.alpha-footer-links { display: flex; flex-wrap: wrap; gap: var(--space-md); }
.alpha-footer-links a { color: var(--text-secondary); text-decoration: none; font-size: 13.5px; font-weight: 600; transition: color .2s; }
.alpha-footer-links a:hover { color: var(--text-primary); }
.alpha-footer-copy { color: var(--text-muted); font-size: 13px; }

/* ── Toast (audio-unsupported fallback) ────────────────────────── */
.alpha-toast {
  position: fixed; inset-inline: 0; bottom: 26px; margin: 0 auto; width: max-content; max-width: 90vw; z-index: 2000;
  background: rgba(18,18,26,0.97); border: 1px solid var(--alpha-border); border-radius: var(--radius-full);
  padding: 12px 20px; color: var(--text-primary); font-size: 14px; box-shadow: 0 20px 44px rgba(0,0,0,0.6);
  opacity: 0; transform: translateY(14px); transition: opacity .3s, transform .3s; pointer-events: none;
}
.alpha-toast.show { opacity: 1; transform: none; }

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 720px) {
  .alpha-nav-links a:not(.alpha-lang-btn) { display: none; }
  .alpha-nav-links { gap: var(--space-sm); }
  .alpha-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
  .alpha-letter { font-size: 2.4rem; }
  .alpha-stat b { font-size: 1.4rem; }
}

@media (prefers-reduced-motion: reduce) {
  .alpha-blob, .alpha-ghost { animation: none; }
  .alpha-reveal { opacity: 1; transform: none; transition: none; }
  .alpha-card, .alpha-feature, .alpha-btn { transition: none; }
}