:root {
  --buzza-bg: #0b0d12;
  --buzza-bg-soft: #11141b;
  --buzza-surface: #151924;
  --buzza-surface-2: #1b2030;
  --buzza-border: rgba(255,255,255,.09);
  --buzza-border-strong: rgba(255,255,255,.16);
  --buzza-text: #f4f6fb;
  --buzza-muted: #9aa4b5;
  --buzza-accent: #7b78ff;
  --buzza-accent-2: #9d7bff;
  --buzza-radius: 18px;
  --buzza-radius-sm: 12px;
  --buzza-shadow: 0 18px 50px rgba(0,0,0,.24);
  --buzza-container: 1240px;
  --buzza-nav-height: 72px;
  --buzza-mobile-nav-height: 68px;
}

* { box-sizing: border-box; }
html { color-scheme: dark; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--buzza-bg);
  color: var(--buzza-text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover { color: #fff; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid rgba(123,120,255,.75); outline-offset: 3px; }
img, video, iframe { max-width: 100%; }

.buzza-site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  border-bottom: 1px solid var(--buzza-border);
  background: rgba(11,13,18,.84);
  backdrop-filter: blur(18px);
}
.buzza-learning-page .buzza-site-header { position: static; background: var(--buzza-bg); backdrop-filter: none; }
.buzza-header-inner {
  width: min(calc(100% - 40px), var(--buzza-container));
  min-height: var(--buzza-nav-height);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 28px;
}
.buzza-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -.02em; font-size: 20px; }
.buzza-brand-mark { width: 34px; height: 34px; border-radius: 10px; display:grid; place-items:center; background: linear-gradient(145deg,var(--buzza-accent),var(--buzza-accent-2)); color:#fff; box-shadow: inset 0 0 0 1px rgba(255,255,255,.18); }
.buzza-desktop-nav { display:flex; align-items:center; gap: 6px; margin-left: auto; }
.buzza-desktop-nav a { color: var(--buzza-muted); padding: 10px 12px; border-radius: 10px; font-weight: 650; }
.buzza-desktop-nav a:hover { color: var(--buzza-text); background: rgba(255,255,255,.05); }
.buzza-button { min-height: 48px; padding: 0 20px; border-radius: 13px; display:inline-flex; align-items:center; justify-content:center; gap:8px; background: linear-gradient(135deg,var(--buzza-accent),var(--buzza-accent-2)); color:#fff; font-weight: 760; border:1px solid rgba(255,255,255,.12); box-shadow: 0 10px 24px rgba(81,77,210,.22); }
.buzza-button:hover { color:#fff; filter: brightness(1.06); }
.buzza-button--small { min-height: 44px; padding-inline: 16px; font-size: 14px; }
.buzza-menu-toggle { display:none; width:44px; height:44px; margin-left:auto; border:1px solid var(--buzza-border); border-radius:12px; background:var(--buzza-surface); padding:10px; }
.buzza-menu-toggle span { display:block; height:2px; background:var(--buzza-text); margin:4px 0; border-radius:2px; }
.buzza-mobile-menu { display:none; }
.buzza-main { min-height: calc(100vh - var(--buzza-nav-height)); }

.buzza-site-footer { border-top:1px solid var(--buzza-border); margin-top:80px; padding: 42px 0 92px; background:#090b0f; }
.buzza-footer-inner { width:min(calc(100% - 40px),var(--buzza-container)); margin:auto; display:flex; justify-content:space-between; gap:32px; color:var(--buzza-muted); }
.buzza-footer-inner strong { color:var(--buzza-text); font-size:18px; }
.buzza-footer-inner p { max-width:430px; margin:8px 0 0; }
.buzza-footer-inner nav { display:flex; gap:22px; align-items:flex-start; }

.buzza-mobile-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  display: none;
  grid-template-columns: repeat(3,1fr);
  min-height: 68px;
  padding: 6px 8px max(6px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--buzza-border-strong);
  background: rgba(12,14,20,.94);
  backdrop-filter: blur(20px);
}
.buzza-mobile-nav a { min-height: 44px; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:2px; color:var(--buzza-muted); font-size:11px; font-weight:700; border-radius:10px; }
.buzza-mobile-nav a[aria-current="page"] { color:#fff; background:rgba(123,120,255,.11); }
.buzza-mobile-nav svg { width:20px; height:20px; fill:none; stroke:currentColor; stroke-width:1.8; stroke-linecap:round; stroke-linejoin:round; }

@media (max-width: 900px) {
  body { padding-bottom: calc(var(--buzza-mobile-nav-height) + env(safe-area-inset-bottom)); }
  .buzza-header-inner { width:min(calc(100% - 28px),var(--buzza-container)); min-height:60px; }
  .buzza-desktop-nav, .buzza-header-cta { display:none; }
  .buzza-menu-toggle { display:block; }
  .buzza-learning-page .buzza-menu-toggle { display:none; }
  .buzza-mobile-nav { display:grid; }
  .buzza-mobile-menu { display:none; padding: 0 14px 14px; border-top:1px solid var(--buzza-border); background:var(--buzza-bg-soft); }
  .buzza-menu-open .buzza-mobile-menu { display:grid; }
  .buzza-mobile-menu a { min-height:48px; display:flex; align-items:center; padding:0 12px; border-bottom:1px solid var(--buzza-border); font-weight:700; }
  .buzza-site-footer { margin-top:56px; padding-bottom:28px; }
  .buzza-footer-inner { width:calc(100% - 28px); flex-direction:column; }
}

@media (max-width: 640px) {
  .buzza-header-inner { width:calc(100% - 24px); }
  .buzza-brand { font-size:18px; }
  .buzza-brand-mark { width:32px; height:32px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}

/* Homepage */
.buzza-section { width: min(calc(100% - 40px), var(--buzza-container)); margin-inline: auto; }
.buzza-home { overflow: clip; }
.buzza-hero { position: relative; padding: clamp(52px, 8vw, 112px) 0 64px; }
.buzza-hero::before { content:""; position:absolute; width:760px; height:560px; right:-260px; top:-180px; border-radius:50%; background:radial-gradient(circle,rgba(123,120,255,.2),rgba(123,120,255,0) 68%); pointer-events:none; }
.buzza-hero-grid { display:grid; grid-template-columns:minmax(0,.94fr) minmax(460px,1.06fr); align-items:center; gap:clamp(40px,6vw,82px); position:relative; }
.buzza-kicker { display:inline-flex; align-items:center; gap:8px; color:#b8b5ff; font-size:12px; line-height:1; font-weight:800; letter-spacing:.12em; text-transform:uppercase; }
.buzza-kicker::before { content:""; width:18px; height:1px; background:currentColor; opacity:.8; }
.buzza-hero h1 { margin:18px 0 20px; max-width:760px; font-size:clamp(42px,5.3vw,76px); line-height:.99; letter-spacing:-.055em; }
.buzza-hero-copy > p { max-width:660px; margin:0; color:var(--buzza-muted); font-size:clamp(17px,1.5vw,20px); line-height:1.7; }
.buzza-hero-actions { display:flex; flex-wrap:wrap; gap:12px; margin-top:30px; }
.buzza-button--secondary { background:var(--buzza-surface); border-color:var(--buzza-border-strong); box-shadow:none; color:var(--buzza-text); }
.buzza-hero-proof { display:flex; flex-wrap:wrap; gap:18px; margin-top:28px; color:#aab3c3; font-size:13px; font-weight:650; }
.buzza-hero-proof span { display:flex; align-items:center; gap:7px; }
.buzza-hero-proof i { width:6px; height:6px; border-radius:50%; background:var(--buzza-accent); box-shadow:0 0 0 4px rgba(123,120,255,.12); }

.buzza-lesson-demo { border:1px solid var(--buzza-border-strong); border-radius:24px; background:linear-gradient(160deg,rgba(28,33,49,.92),rgba(15,18,25,.96)); box-shadow:0 30px 80px rgba(0,0,0,.32); overflow:hidden; }
.buzza-demo-toolbar { min-height:48px; padding:0 16px; display:flex; align-items:center; gap:12px; border-bottom:1px solid var(--buzza-border); color:#aeb6c5; font-size:12px; font-weight:700; }
.buzza-demo-dots { display:flex; gap:5px; margin-right:2px; }
.buzza-demo-dots span { width:7px; height:7px; border-radius:50%; background:#555d6d; }
.buzza-demo-status { margin-left:auto; color:#c7c5ff; background:rgba(123,120,255,.11); border:1px solid rgba(123,120,255,.18); border-radius:99px; padding:4px 8px; }
.buzza-demo-video { padding:14px 14px 8px; }
.buzza-demo-video-art { aspect-ratio:16/8.3; position:relative; display:grid; place-items:center; border-radius:15px; overflow:hidden; background:radial-gradient(circle at 72% 34%,rgba(157,123,255,.58),transparent 20%),linear-gradient(135deg,#29234c 0%,#16223c 46%,#10141e 100%); }
.buzza-demo-video-art::before,.buzza-demo-video-art::after { content:""; position:absolute; inset:auto auto 0 0; width:56%; height:70%; background:linear-gradient(135deg,transparent 22%,rgba(255,255,255,.05) 23% 28%,transparent 29%),linear-gradient(to top right,#121827,#252e48); clip-path:polygon(0 100%,44% 30%,60% 48%,74% 12%,100% 100%); }
.buzza-demo-video-art::after { left:auto; right:0; width:48%; opacity:.65; transform:scaleX(-1); }
.buzza-play-button { position:relative; z-index:3; width:58px; height:58px; display:grid; place-items:center; border-radius:50%; background:rgba(12,14,20,.72); border:1px solid rgba(255,255,255,.2); color:#fff; padding-left:3px; }
.buzza-video-chip { position:absolute; z-index:3; right:12px; bottom:10px; border-radius:8px; padding:4px 8px; background:rgba(4,5,8,.68); color:#d6dae4; font-size:11px; }
.buzza-demo-progress { height:3px; margin:8px 2px 0; border-radius:99px; background:#292e3b; overflow:hidden; }
.buzza-demo-progress span { display:block; width:28%; height:100%; background:linear-gradient(90deg,var(--buzza-accent),#b087ff); }
.buzza-demo-language-head,.buzza-demo-line { display:grid; grid-template-columns:58px minmax(0,1fr) minmax(0,1fr); gap:12px; align-items:start; }
.buzza-demo-language-head { margin:6px 14px 0; padding:10px 8px; color:#747f91; font-size:10px; font-weight:800; letter-spacing:.05em; text-transform:uppercase; }
.buzza-demo-language-head span { display:flex; flex-direction:column; color:#dce1eb; text-transform:none; letter-spacing:0; font-size:12px; }
.buzza-demo-language-head span:first-child { color:#747f91; text-transform:uppercase; font-size:10px; }
.buzza-demo-language-head small { color:#747f91; font-size:9px; text-transform:uppercase; letter-spacing:.08em; }
.buzza-demo-line { margin:0 14px 10px; padding:13px 8px; border:1px solid transparent; border-radius:12px; color:#cbd1dc; }
.buzza-demo-line.is-active { border-color:rgba(123,120,255,.34); background:rgba(123,120,255,.095); }
.buzza-demo-line time { color:#7f8999; font-size:11px; font-variant-numeric:tabular-nums; }
.buzza-demo-line strong { display:block; color:#f4f6fb; font-size:13px; line-height:1.45; }
.buzza-demo-line small { display:block; margin-top:5px; color:#778296; font-size:10px; line-height:1.35; }
.buzza-demo-line .buzza-ipa { color:#a8b1c2; font-family:ui-monospace,SFMono-Regular,Menlo,monospace; }

.buzza-home-section { padding-top:clamp(64px,8vw,112px); }
.buzza-section-heading { max-width:700px; margin-bottom:32px; }
.buzza-section-heading--wide { max-width:920px; }
.buzza-section-heading h2,.buzza-showcase h2,.buzza-final-cta h2 { margin:14px 0 12px; font-size:clamp(31px,4vw,54px); line-height:1.06; letter-spacing:-.04em; }
.buzza-section-heading p,.buzza-showcase-copy > p,.buzza-final-cta p { margin:0; color:var(--buzza-muted); font-size:17px; }
.buzza-steps { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }
.buzza-step-card { min-height:230px; padding:26px; border:1px solid var(--buzza-border); border-radius:var(--buzza-radius); background:linear-gradient(160deg,rgba(25,29,41,.82),rgba(16,19,27,.78)); }
.buzza-step-card > span { display:grid; place-items:center; width:38px; height:38px; border-radius:11px; background:rgba(123,120,255,.1); color:#b8b5ff; font-size:12px; font-weight:850; }
.buzza-step-card h3 { margin:38px 0 8px; font-size:20px; letter-spacing:-.02em; }
.buzza-step-card p { margin:0; color:var(--buzza-muted); }

.buzza-feature-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; }
.buzza-feature-card { min-height:236px; padding:24px; border:1px solid var(--buzza-border); border-radius:var(--buzza-radius); background:var(--buzza-bg-soft); }
.buzza-feature-card--large { grid-column:span 2; background:linear-gradient(145deg,rgba(123,120,255,.12),var(--buzza-bg-soft) 60%); }
.buzza-feature-card--wide { grid-column:span 2; display:grid; grid-template-columns:1fr .9fr; align-items:center; gap:24px; }
.buzza-feature-icon { min-width:40px; height:40px; display:inline-grid; place-items:center; padding:0 9px; border:1px solid rgba(123,120,255,.21); border-radius:11px; color:#c6c4ff; background:rgba(123,120,255,.08); font-size:12px; font-weight:850; }
.buzza-feature-card h3 { margin:28px 0 8px; font-size:19px; line-height:1.25; letter-spacing:-.02em; }
.buzza-feature-card p { margin:0; color:var(--buzza-muted); font-size:14px; }
.buzza-language-pills { display:flex; align-items:center; gap:10px; margin-top:22px; }
.buzza-language-pills span { padding:7px 11px; border-radius:9px; border:1px solid var(--buzza-border-strong); background:rgba(255,255,255,.035); font-size:12px; font-weight:750; }
.buzza-language-pills i { color:#6f7888; font-style:normal; }
.buzza-progress-demo { border:1px solid var(--buzza-border); border-radius:14px; padding:16px; background:#0e1117; }
.buzza-progress-demo > div:first-child { display:flex; justify-content:space-between; gap:10px; font-size:12px; }
.buzza-progress-demo b { color:#b9b6ff; }
.buzza-progress-demo small { display:block; margin-top:8px; color:#697386; }
.buzza-meter { height:5px; margin-top:10px; overflow:hidden; border-radius:99px; background:#272c37; }
.buzza-meter i { display:block; height:100%; border-radius:inherit; background:linear-gradient(90deg,var(--buzza-accent),#a978ff); }

.buzza-showcase { display:grid; grid-template-columns:minmax(0,.78fr) minmax(520px,1.22fr); gap:clamp(42px,7vw,92px); align-items:center; }
.buzza-showcase--reverse { grid-template-columns:minmax(520px,1.15fr) minmax(0,.85fr); }
.buzza-check-list { display:grid; gap:10px; margin:24px 0 20px; padding:0; list-style:none; color:#c6ccd8; }
.buzza-check-list li { position:relative; padding-left:26px; }
.buzza-check-list li::before { content:"✓"; position:absolute; left:0; top:0; color:#a8a5ff; font-weight:900; }
.buzza-text-link { display:inline-flex; align-items:center; gap:8px; color:#c8c6ff; font-weight:800; }
.buzza-library-mock,.buzza-series-mock { border:1px solid var(--buzza-border-strong); border-radius:22px; padding:16px; background:linear-gradient(160deg,#171b26,#10131a); box-shadow:var(--buzza-shadow); }
.buzza-library-toolbar { min-height:48px; display:flex; align-items:center; justify-content:space-between; gap:12px; color:#e7eaf1; font-size:13px; font-weight:800; }
.buzza-mock-search { min-width:170px; padding:8px 10px; border:1px solid var(--buzza-border); border-radius:9px; color:#707a8c; font-size:11px; font-weight:600; }
.buzza-mock-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:10px; }
.buzza-mock-video-card { overflow:hidden; border:1px solid var(--buzza-border); border-radius:13px; background:#0f1218; }
.buzza-mock-thumb { aspect-ratio:16/9; position:relative; background:linear-gradient(140deg,#292159,#121a28); }
.buzza-mock-thumb--2 { background:linear-gradient(140deg,#1b3d45,#161c2b); }
.buzza-mock-thumb--3 { background:linear-gradient(140deg,#4a273b,#171a27); }
.buzza-mock-thumb span { position:absolute; left:8px; bottom:8px; padding:3px 6px; border-radius:6px; background:rgba(5,6,9,.7); color:#e1e5ed; font-size:9px; }
.buzza-mock-card-body { padding:10px; }
.buzza-mock-card-body h3 { margin:0 0 7px; font-size:11px; }
.buzza-mock-card-body small { display:block; margin-top:6px; color:#70798a; font-size:9px; }
.buzza-series-mock { display:grid; grid-template-columns:.86fr 1.14fr; gap:14px; }
.buzza-series-cover { min-height:300px; padding:20px; display:flex; flex-direction:column; justify-content:flex-end; border-radius:15px; background:radial-gradient(circle at 35% 24%,rgba(155,124,255,.52),transparent 28%),linear-gradient(160deg,#262050,#11192b 55%,#0c1018); }
.buzza-series-cover span { align-self:flex-start; margin-bottom:auto; padding:5px 8px; border-radius:7px; background:rgba(0,0,0,.28); color:#d6d8e0; font-size:10px; }
.buzza-series-cover strong { font-size:25px; letter-spacing:-.03em; }
.buzza-series-cover small { color:#9ca5b6; }
.buzza-episode-list { display:grid; align-content:center; gap:8px; }
.buzza-episode-list > div { min-height:70px; padding:10px 12px; display:grid; grid-template-columns:30px 1fr 24px; align-items:center; gap:8px; border:1px solid var(--buzza-border); border-radius:12px; background:#0e1117; }
.buzza-episode-list > div.is-current { border-color:rgba(123,120,255,.35); background:rgba(123,120,255,.08); }
.buzza-episode-list b { color:#7b8495; font-size:11px; }
.buzza-episode-list strong,.buzza-episode-list small { display:block; }
.buzza-episode-list strong { font-size:12px; }
.buzza-episode-list small { margin-top:2px; color:#717b8d; font-size:9px; }
.buzza-episode-list i { color:#aaa8ff; font-style:normal; text-align:center; }

.buzza-final-cta { margin-top:clamp(76px,10vw,140px); margin-bottom:clamp(68px,8vw,110px); min-height:300px; padding:clamp(34px,5vw,64px); display:flex; align-items:center; justify-content:space-between; gap:32px; border:1px solid rgba(123,120,255,.22); border-radius:26px; background:radial-gradient(circle at 82% 14%,rgba(123,120,255,.18),transparent 35%),linear-gradient(145deg,#171a26,#10131a); }
.buzza-final-cta > div { max-width:760px; }

@media (max-width: 1024px) {
  .buzza-hero-grid { grid-template-columns:1fr; }
  .buzza-hero-copy { max-width:800px; }
  .buzza-lesson-demo { max-width:760px; }
  .buzza-feature-grid { grid-template-columns:repeat(2,1fr); }
  .buzza-showcase,.buzza-showcase--reverse { grid-template-columns:1fr; }
  .buzza-showcase--reverse .buzza-series-mock { order:2; }
  .buzza-showcase--reverse .buzza-showcase-copy { order:1; }
}
@media (max-width: 768px) {
  .buzza-section { width:calc(100% - 28px); }
  .buzza-hero { padding-top:44px; }
  .buzza-hero h1 { font-size:clamp(40px,11vw,58px); }
  .buzza-steps { grid-template-columns:1fr; }
  .buzza-step-card { min-height:0; }
  .buzza-step-card h3 { margin-top:24px; }
  .buzza-feature-card--large,.buzza-feature-card--wide { grid-column:auto; }
  .buzza-feature-card--wide { grid-template-columns:1fr; }
  .buzza-mock-grid { grid-template-columns:repeat(2,1fr); }
  .buzza-mock-video-card:last-child { display:none; }
  .buzza-final-cta { align-items:flex-start; flex-direction:column; }
}
@media (max-width: 520px) {
  .buzza-hero-actions { display:grid; grid-template-columns:1fr; }
  .buzza-hero-actions .buzza-button { width:100%; }
  .buzza-hero-proof { display:grid; gap:10px; }
  .buzza-lesson-demo { border-radius:18px; }
  .buzza-demo-language-head,.buzza-demo-line { grid-template-columns:44px minmax(0,1fr) minmax(0,1fr); gap:7px; }
  .buzza-demo-language-head,.buzza-demo-line { margin-inline:8px; }
  .buzza-demo-line { padding-inline:6px; }
  .buzza-demo-line strong { font-size:11px; }
  .buzza-demo-line small { font-size:9px; }
  .buzza-feature-grid { grid-template-columns:1fr; }
  .buzza-series-mock { grid-template-columns:1fr; }
  .buzza-series-cover { min-height:210px; }
  .buzza-mock-grid { grid-template-columns:1fr 1fr; }
  .buzza-mock-search { min-width:0; max-width:135px; }
  .buzza-final-cta { padding:28px 22px; border-radius:20px; }
}

/* Bilingual YouTube Learning integration */
.buzza-app-page .buzza-main { width: 100%; }
.buzza-learning-page .buzza-main { padding: 14px 14px 0; }
.buzza-learning-page .buzza-site-footer { display: none; }
.buzza-learning-page .byl-app {
  --byl-bg: #0f1219;
  --byl-card: #151923;
  --byl-text: #f4f6fb;
  --byl-muted: #929daf;
  --byl-border: rgba(255,255,255,.10);
  --byl-accent: #7b78ff;
  --byl-accent-soft: rgba(123,120,255,.13);
  --byl-surface-raised: #171c27;
  --byl-control-bg: #1a202c;
  --byl-control-hover: rgba(255,255,255,.045);
  --byl-divider: rgba(255,255,255,.075);
  --byl-success: #57d7a0;
  --byl-success-bg: rgba(47,205,132,.10);
  --byl-danger: #ff8b8b;
  --byl-error-bg: rgba(255,93,93,.10);
  --byl-pronunciation-bg: #121722;
  --byl-progress-track: #292f3b;
  width: min(100%, 1540px);
  margin: 0 auto;
  border-color: var(--byl-border);
  background: var(--byl-bg);
  box-shadow: 0 18px 50px rgba(0,0,0,.24);
  color-scheme: dark;
}
.buzza-learning-page .byl-topbar { display:none; }
.buzza-learning-page .byl-library,
.buzza-learning-page .byl-right-pane { background: var(--byl-card); }
.buzza-learning-page .byl-left-pane { background: #10141b; }
.buzza-learning-page .byl-btn-soft,
.buzza-learning-page .byl-library-card,
.buzza-learning-page .byl-series-nav,
.buzza-learning-page .byl-series-nav-btn { background:#1a1f2a; color:var(--byl-text); border-color:var(--byl-border); }
.buzza-learning-page .byl-workspace { min-height: min(720px, calc(100vh - 110px)); }
.buzza-learning-page .byl-player-stage { min-width: 0; }
.buzza-learning-page .byl-player-shell { border:1px solid rgba(255,255,255,.08); box-shadow:0 12px 30px rgba(0,0,0,.24); }
.buzza-learning-page .byl-right-pane { min-height:0; overflow:hidden; }
.buzza-learning-page .byl-right-pane { border-left-color:var(--byl-border); }
.buzza-learning-page .byl-transcript { flex:1; min-height:0; }
.buzza-learning-page .byl-transcript-toolbar { border-color:var(--byl-border); background:#151923; }
.buzza-learning-page .byl-transcript-row { border-color:rgba(255,255,255,.07); }
.buzza-learning-page .byl-transcript-row.is-active,
.buzza-learning-page .byl-transcript-row.active { background:rgba(123,120,255,.09); }
.buzza-learning-page .byl-language-chip,
.buzza-learning-page .byl-chip { border-color:var(--byl-border); background:#191e29; color:var(--byl-text); }
.buzza-learning-page .byl-mobile-settings-sheet { background:#11151d; border-color:rgba(255,255,255,.13); color:var(--byl-text); }
.buzza-learning-page .byl-mobile-settings-fab { box-shadow:0 10px 30px rgba(0,0,0,.36); }

.buzza-learning-page .byl-subtitle-display-controls {
  gap:10px 12px;
  padding:12px 13px;
  background:var(--byl-surface-raised);
  border-color:var(--byl-border);
  box-shadow:0 10px 28px rgba(0,0,0,.14);
}
.buzza-learning-page .byl-subtitle-display-title { width:100%; color:var(--byl-text); }
.buzza-learning-page .byl-subtitle-toggle-group { gap:12px; }
.buzza-learning-page .byl-subtitle-style-group {
  width:100%;
  margin-left:0;
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:8px;
}
.buzza-learning-page .byl-subtitle-style-group label { min-width:0; flex-direction:column; align-items:stretch; gap:5px; }
.buzza-learning-page .byl-subtitle-style-group select { width:100%; min-height:38px; color-scheme:dark; }
.buzza-learning-page .byl-track-wrap select,
.buzza-learning-page .byl-language-add select,
.buzza-learning-page .byl-mobile-select-row select { color-scheme:dark; }
.buzza-learning-page .byl-status { border-color:var(--byl-divider); }
.buzza-learning-page .byl-status[data-type="success"] { color:#73dfae; }
.buzza-learning-page .byl-transcript-head { background:#121722; border-color:var(--byl-divider); color:#7f8a9d; }
.buzza-learning-page .byl-transcript-row { border-color:var(--byl-divider); }
.buzza-learning-page .byl-transcript-row:hover { background:var(--byl-control-hover); }
.buzza-learning-page .byl-transcript-row.is-active,
.buzza-learning-page .byl-transcript-row.active { background:rgba(123,120,255,.105); box-shadow:inset 3px 0 0 var(--byl-accent); }
.buzza-learning-page .byl-pronunciation-pair { box-shadow:inset 0 1px 0 rgba(255,255,255,.025); }
.buzza-learning-page .byl-series-nav { margin-top:12px; padding:8px; box-shadow:none; }
.buzza-learning-page .byl-series-nav-btn { min-height:36px; }

.buzza-library-page .byl-library-page,
.buzza-series-page .byl-series-page {
  --byl-bg: #0f1219;
  --byl-card: #151923;
  --byl-text: #f4f6fb;
  --byl-muted: #929daf;
  --byl-border: rgba(255,255,255,.10);
  --byl-accent: #7b78ff;
  --byl-surface-raised:#171c27;
  --byl-control-bg:#1a202c;
  --byl-control-hover:rgba(255,255,255,.045);
  --byl-divider:rgba(255,255,255,.075);
  --byl-progress-track:#292f3b;
  width:min(1440px, calc(100% - 32px));
  margin:24px auto 0;
  border-color:var(--byl-border);
  background:var(--byl-bg);
  box-shadow:0 18px 50px rgba(0,0,0,.22);
}
.buzza-library-page .byl-library-controls input,
.buzza-library-page .byl-library-controls select { background:#151923; color:var(--byl-text); border-color:var(--byl-border); }
.buzza-library-page .byl-library-controls input::placeholder { color:#707b8d; }
.buzza-library-page .byl-full-library-card,
.buzza-series-page .byl-series-card,
.buzza-series-page .byl-series-detail-hero,
.buzza-series-page .byl-series-episode-card { background:var(--byl-card); border-color:var(--byl-border); box-shadow:none; }
.buzza-library-page .byl-full-library-card:hover,
.buzza-series-page .byl-series-card:hover,
.buzza-series-page .byl-series-episode-card:hover { border-color:rgba(123,120,255,.45); box-shadow:0 14px 32px rgba(0,0,0,.22); }
.buzza-library-page .byl-full-library-media,
.buzza-series-page .byl-series-card-media,
.buzza-series-page .byl-series-detail-hero > img { aspect-ratio: 16 / 9; background:#0b0e14; }
.buzza-library-page .byl-library-series-meta { color:#b3bdca; }
.buzza-library-page .byl-card-progress-track,
.buzza-series-page .byl-card-progress-track { background:#292f3b; }
.buzza-library-page .byl-library-empty { background:#12161f; border-color:rgba(255,255,255,.12); }
.buzza-series-page .byl-series-episode-card { min-height: 64px; }
.buzza-series-page .byl-series-episode-number { min-height:44px; background:rgba(123,120,255,.12); color:#b9b6ff; }
.buzza-series-page .byl-series-back,
.buzza-series-page .byl-series-nav-btn { min-height:44px; display:inline-flex; align-items:center; }


@media (min-width: 981px) {
  .buzza-learning-page .buzza-main {
    min-height: calc(100dvh - var(--buzza-nav-height));
    height:auto;
    overflow:visible;
    padding:10px 14px 0;
  }
}

@media (max-width: 640px) {
  .buzza-learning-page .buzza-main { padding-inline: 12px; padding-top:8px; }
  .buzza-learning-page .byl-app { border-radius:14px; }
  .buzza-learning-page .byl-workspace { min-height:0; }
  .buzza-learning-page .byl-left-pane { padding:12px; }
  .buzza-learning-page .byl-mobile-settings-fab { bottom: calc(82px + env(safe-area-inset-bottom)); }
  .buzza-learning-page .byl-mobile-settings-sheet { padding-bottom: calc(20px + env(safe-area-inset-bottom)); }
  .buzza-learning-page .byl-subtitle-style-group { grid-template-columns:1fr; }
  .buzza-library-page .byl-library-page,
  .buzza-series-page .byl-series-page { width:calc(100% - 24px); margin:8px auto 0; padding:14px; border-radius:16px; }
  .buzza-library-page .byl-library-controls { gap:8px; }
  .buzza-series-page .byl-series-episode-card { min-height:56px; }
}

@media (max-width: 480px) {
  .buzza-library-page .byl-full-library-grid,
  .buzza-series-page .byl-series-grid { grid-template-columns: 1fr; gap:12px; }
}
@media (min-width: 481px) and (max-width: 760px) {
  .buzza-library-page .byl-full-library-grid,
  .buzza-series-page .byl-series-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap:12px; }
}
@media (min-width: 761px) and (max-width: 1180px) {
  .buzza-library-page .byl-full-library-grid,
  .buzza-series-page .byl-series-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap:16px; }
}
@media (min-width: 1181px) {
  .buzza-library-page .byl-full-library-grid,
  .buzza-series-page .byl-series-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap:18px; }
}

/* Generic WordPress content */
.buzza-content-shell,
.buzza-page-card,
.buzza-error-page { width:min(calc(100% - 40px), 980px); margin:clamp(34px,6vw,80px) auto 0; }
.buzza-page-card { padding:clamp(24px,4vw,48px); border:1px solid var(--buzza-border); border-radius:22px; background:var(--buzza-bg-soft); }
.buzza-page-header h1 { margin:0 0 26px; font-size:clamp(34px,5vw,58px); line-height:1.04; letter-spacing:-.04em; }
.buzza-entry-content { color:#d8dde7; }
.buzza-entry-content > *:first-child { margin-top:0; }
.buzza-entry-content > *:last-child { margin-bottom:0; }
.buzza-entry-content a { color:#b9b6ff; text-decoration:underline; text-underline-offset:3px; }
.buzza-entry-content h2,.buzza-entry-content h3 { color:var(--buzza-text); line-height:1.2; letter-spacing:-.025em; }
.buzza-entry-content img { border-radius:16px; }
.buzza-app-content { width:100%; margin:0; padding:0; }
.buzza-post-list { display:grid; gap:16px; }
.buzza-post-card { padding:24px; border:1px solid var(--buzza-border); border-radius:18px; background:var(--buzza-bg-soft); }
.buzza-post-card h2 { margin:4px 0 10px; font-size:clamp(24px,3vw,34px); letter-spacing:-.03em; }
.buzza-post-meta { margin:0; color:#798497; font-size:12px; font-weight:700; text-transform:uppercase; letter-spacing:.08em; }
.buzza-post-excerpt { color:var(--buzza-muted); }
.buzza-pagination { margin-top:28px; }
.buzza-pagination .nav-links { display:flex; flex-wrap:wrap; gap:8px; }
.buzza-pagination .page-numbers { min-width:44px; min-height:44px; display:grid; place-items:center; border:1px solid var(--buzza-border); border-radius:10px; }
.buzza-pagination .current { background:rgba(123,120,255,.13); border-color:rgba(123,120,255,.32); }
.buzza-empty-state,.buzza-error-page { min-height:420px; display:flex; flex-direction:column; justify-content:center; align-items:flex-start; }
.buzza-empty-state h1,.buzza-error-page h1 { margin:10px 0 12px; font-size:clamp(38px,6vw,66px); line-height:1; letter-spacing:-.05em; }
.buzza-empty-state p,.buzza-error-page p { max-width:600px; margin:0; color:var(--buzza-muted); font-size:17px; }
.buzza-error-code { color:#aaa8ff; font-weight:900; letter-spacing:.12em; }
.buzza-error-actions { display:flex; flex-wrap:wrap; gap:12px; margin-top:26px; }

@media (max-width: 640px) {
  .buzza-content-shell,.buzza-page-card,.buzza-error-page { width:calc(100% - 24px); }
  .buzza-page-card { padding:22px 18px; border-radius:16px; }
  .buzza-error-actions { width:100%; display:grid; grid-template-columns:1fr; }
  .buzza-error-actions .buzza-button { width:100%; }
}

/* Discovery rows and episode media */
.buzza-learning-page .byl-discovery { max-width: none; }
.buzza-learning-page .byl-discovery-section { border-color: rgba(255,255,255,.08); }
.buzza-learning-page .byl-discovery-list { gap: 14px; }
.buzza-learning-page .byl-discovery-card { background: #151923; border-color: rgba(255,255,255,.09); border-radius: 14px; }
.buzza-learning-page .byl-discovery-card:hover { border-color: rgba(123,120,255,.5); transform: translateY(-1px); box-shadow: 0 14px 32px rgba(0,0,0,.22); }
.buzza-series-page .byl-series-episode-media { box-shadow: inset 0 0 0 1px rgba(255,255,255,.06); }

@media (max-width: 767px) {
  .buzza-learning-page .byl-discovery-list { scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch; }
  .buzza-series-page .byl-series-episode-media { width: 120px; }
}

@media (min-width: 768px) {
  .buzza-learning-page .byl-discovery-list {
    grid-template-columns: repeat(auto-fill, minmax(280px, 320px));
    justify-content: start;
  }
  .buzza-series-page .byl-series-episode-media { width: 160px; }
}

/* Video Library mobile filtering: compact actions + premium bottom sheet. */
.buzza-library-page .byl-library-mobile-action {
  border-color: rgba(255,255,255,.105);
  background: #181d28;
  color: #f3f5fa;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.025);
}
.buzza-library-page .byl-library-mobile-action:hover,
.buzza-library-page .byl-library-mobile-action[aria-expanded="true"] {
  border-color: rgba(123,120,255,.48);
  background: rgba(123,120,255,.11);
}
.buzza-library-page .byl-library-filter-count { background: #7b78ff; color: #fff; }
.buzza-library-page .byl-library-filter-chip {
  border-color: rgba(123,120,255,.32);
  background: rgba(123,120,255,.10);
  color: #e8e8ff;
}
.buzza-library-page .byl-library-sort-menu {
  border-color: rgba(255,255,255,.11);
  background: #171c27;
  box-shadow: 0 18px 44px rgba(0,0,0,.38);
}
.buzza-library-page .byl-library-sort-menu button { border-color: rgba(255,255,255,.07); color: #eef1f7; }
.buzza-library-page .byl-library-sort-menu button:hover,
.buzza-library-page .byl-library-sort-menu button.is-active { background: rgba(123,120,255,.11); color: #b9b6ff; }

@media (max-width: 780px) {
  .buzza-library-page .byl-library-compact-header { margin-bottom: 14px; }
  .buzza-library-page .byl-library-compact-header .byl-kicker { display: none; }
  .buzza-library-page .byl-library-compact-header h1 { margin-top: 0; font-size: clamp(29px, 9vw, 38px); }
  .buzza-library-page .byl-library-filter-backdrop { background: rgba(3,5,9,.72); backdrop-filter: blur(2px); }
  .buzza-library-page .byl-library-filter-sheet {
    border-color: rgba(255,255,255,.12);
    background: #11151d;
    color: #f4f6fb;
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
    box-shadow: 0 -24px 60px rgba(0,0,0,.5);
  }
  .buzza-library-page .byl-library-filter-close,
  .buzza-library-page .byl-library-filter-fields select { border-color: rgba(255,255,255,.10); background: #191f2a; color: #f4f6fb; }
  .buzza-library-page .byl-library-filter-sheet-actions { border-color: rgba(255,255,255,.075); background: #11151d; }
  .buzza-library-page .byl-library-filter-sheet-actions [data-library-filter-apply] { border-color: #7b78ff; background: #7b78ff; color: #fff; }
  .buzza-library-page .byl-library-filter-sheet-actions [data-library-filter-reset] { border-color: rgba(255,255,255,.11); background: #191f2a; color: #d9deea; }
}


/* Resizable learning workspace */
.buzza-learning-page .byl-workspace-splitter {
  background:linear-gradient(180deg,transparent,rgba(255,255,255,.018),transparent);
}
.buzza-learning-page .byl-workspace-splitter-line { background:rgba(255,255,255,.07); }
.buzza-learning-page .byl-workspace-splitter-handle {
  border-color:rgba(255,255,255,.11);
  background:#151b25;
  color:#8d96a7;
  box-shadow:0 8px 20px rgba(0,0,0,.24);
}
.buzza-learning-page .byl-workspace-splitter:hover .byl-workspace-splitter-line,
.buzza-learning-page .byl-workspace-splitter:focus-visible .byl-workspace-splitter-line,
.buzza-learning-page .byl-workspace.is-resizing .byl-workspace-splitter-line {
  background:#7b78ff;
  box-shadow:0 0 0 3px rgba(123,120,255,.11),0 0 14px rgba(123,120,255,.18);
}
.buzza-learning-page .byl-workspace-splitter:hover .byl-workspace-splitter-handle,
.buzza-learning-page .byl-workspace-splitter:focus-visible .byl-workspace-splitter-handle,
.buzza-learning-page .byl-workspace.is-resizing .byl-workspace-splitter-handle {
  border-color:rgba(123,120,255,.8);
  background:#171d29;
  color:#cbcaff;
  box-shadow:0 0 0 4px rgba(123,120,255,.12),0 10px 26px rgba(0,0,0,.28);
}
.buzza-learning-page .byl-workspace.is-resizing { box-shadow:0 0 0 1px rgba(123,120,255,.06) inset; }
@media (max-width: 980px) {
  .buzza-learning-page .byl-workspace-splitter { display:none; }
}

/* Learning Series mini playlist */
.buzza-learning-page .byl-series-nav {
  margin-top: 12px;
  padding: 12px;
  border-color: rgba(255,255,255,.09);
  background: #151923;
  border-radius: 14px;
  box-shadow: none;
}
.buzza-learning-page .byl-series-nav-head { min-height: 24px; }
.buzza-learning-page .byl-series-nav-heading strong { color:#f6f7fb; font-size:13px; letter-spacing:-.01em; }
.buzza-learning-page .byl-series-nav-heading span { color:#778397; }
.buzza-learning-page .byl-series-view-link { color:#9b97ff; }
.buzza-learning-page .byl-series-episode-rail { gap:10px; scroll-padding-inline:6px; }
.buzza-learning-page .byl-series-mini-card { background:#181d28; border-color:rgba(255,255,255,.085); }
.buzza-learning-page .byl-series-mini-card:hover { background:#1c2230; border-color:rgba(123,120,255,.5); box-shadow:0 8px 22px rgba(0,0,0,.18); }
.buzza-learning-page .byl-series-mini-card.is-current { background:linear-gradient(145deg,rgba(123,120,255,.16),#191d2a 70%); border-color:#7b78ff; box-shadow:0 0 0 1px rgba(123,120,255,.18),0 10px 28px rgba(32,28,88,.22); }
.buzza-learning-page .byl-series-mini-media { box-shadow:inset 0 0 0 1px rgba(255,255,255,.06); }
.buzza-learning-page .byl-series-now-playing { background:#7b78ff; color:#fff; box-shadow:0 3px 10px rgba(123,120,255,.24); }
.buzza-learning-page .byl-series-nav-btn { min-height:40px; background:#181d28; border-color:rgba(255,255,255,.085); }
.buzza-learning-page .byl-series-nav-btn:hover { background:rgba(123,120,255,.11); border-color:rgba(123,120,255,.48); }

@media (max-width: 720px) {
  .buzza-learning-page .byl-series-nav { margin-inline:0; padding:10px; }
  .buzza-learning-page .byl-series-episode-rail { margin-inline:-10px; padding-inline:10px; scroll-snap-type: x mandatory; -webkit-overflow-scrolling:touch; }
  .buzza-learning-page .byl-series-mini-card { flex-basis:min(78vw,250px); scroll-snap-align:center; }
  .buzza-learning-page .byl-series-nav-actions { gap:7px; }
  .buzza-learning-page .byl-series-nav-btn { min-height:44px; }
  .buzza-learning-page .byl-series-nav-episode-label { max-width:38vw; }
}

/* Scale states: long transcripts + paginated catalog */
.buzza-learning-page .byl-transcript-row.is-loading {
  border-color: rgba(255,255,255,.055);
  background: linear-gradient(90deg,#151a24 20%,#1c2230 50%,#151a24 80%);
  background-size: 220% 100%;
  animation: buzza-scale-shimmer 1.15s linear infinite;
}
.buzza-learning-page .byl-transcript-follow { background: rgba(15,19,27,.9); border-color: rgba(255,255,255,.075); }
.buzza-learning-page .byl-return-current {
  border-color: rgba(123,120,255,.45);
  background: rgba(123,120,255,.13);
  color: #dedcff;
  box-shadow: 0 8px 22px rgba(0,0,0,.18);
}
.buzza-learning-page .byl-return-current:hover { background: rgba(123,120,255,.2); }
.byl-scale-skeleton {
  min-height: 148px;
  border: 1px solid rgba(255,255,255,.07);
  border-radius: 14px;
  background: linear-gradient(90deg,#141924 20%,#1b2230 50%,#141924 80%);
  background-size: 220% 100%;
  animation: buzza-scale-shimmer 1.15s linear infinite;
}
.byl-scale-retry { display:flex; align-items:center; justify-content:center; gap:10px; padding:18px; border:1px dashed rgba(255,255,255,.12); border-radius:14px; color:#9aa5b7; background:#121720; }
.byl-scale-retry button { border:1px solid rgba(123,120,255,.4); border-radius:10px; background:rgba(123,120,255,.12); color:#d8d6ff; padding:8px 12px; font-weight:800; }
@keyframes buzza-scale-shimmer { from { background-position: 100% 0; } to { background-position: -100% 0; } }
@media (prefers-reduced-motion: reduce) { .byl-scale-skeleton, .buzza-learning-page .byl-transcript-row.is-loading { animation: none; } }