:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #152033;
  --muted: #5b677a;
  --border: #e4e8ee;
  --accent: #1565c0;
  --accent-2: #0b3a6e;
  --accent-soft: #e8f1fb;
  --ok: #1b7f4e;
  --ok-bg: #e8f6ee;
  --warn: #b45309;
  --danger: #b42318;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16,24,40,.06), 0 1px 3px rgba(16,24,40,.04);
  --font: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --nav-h: 64px;
  --bottom-h: 64px;
  --max: 1180px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: var(--font); line-height: 1.5; }
html { scroll-behavior: smooth; }
body { min-height: 100dvh; }
img { max-width: 100%; }
button, input, select, textarea { font: inherit; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.skip { position: absolute; left: -999px; top: 8px; background: #fff; padding: 8px 12px; z-index: 100; }
.skip:focus { left: 8px; }
.app-header {
  position: sticky; top: 0; z-index: 40;
  background: #fff; border-bottom: 1px solid var(--border);
  height: var(--nav-h); display: flex; align-items: center;
}
.header-inner {
  width: 100%; max-width: 1400px; margin: 0 auto;
  display: flex; align-items: center; gap: 16px; padding: 0 16px;
}
.logo { display: flex; align-items: center; gap: 10px; color: var(--accent-2); font-weight: 700; text-decoration: none; flex-shrink: 0; }
.logo img { width: 32px; height: 32px; }
.logo span { letter-spacing: .02em; }
.nav-desktop { display: none; gap: 4px; flex: 1; }
.nav-desktop a {
  color: var(--text); text-decoration: none; padding: 8px 10px; border-radius: 8px; font-size: 14px; font-weight: 600;
}
.nav-desktop a:hover, .nav-desktop a.active { background: var(--accent-soft); color: var(--accent-2); }
.header-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.search-mini { display: none; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--border); background: #fff; color: var(--text);
  border-radius: 10px; padding: 8px 14px; cursor: pointer; font-weight: 600; font-size: 14px;
}
.btn:hover { background: #f3f5f8; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-2); }
.btn-ghost { border-color: transparent; background: transparent; }
.btn:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid #90caf9; outline-offset: 2px;
}
.icon-btn { width: 40px; height: 40px; padding: 0; }
main#app { min-height: calc(100dvh - var(--nav-h) - var(--bottom-h)); padding-bottom: 24px; }
@media (min-width: 900px) {
  .nav-desktop { display: flex; }
  .search-mini { display: flex; flex: 1; max-width: 360px; }
  main#app { min-height: calc(100dvh - var(--nav-h)); padding-bottom: 48px; }
  .bottom-nav { display: none !important; }
  .menu-toggle { display: none; }
}
.bottom-nav {
  position: fixed; left: 0; right: 0; bottom: 0; height: var(--bottom-h);
  background: #fff; border-top: 1px solid var(--border);
  display: flex; z-index: 40;
}
.bottom-nav a {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: var(--muted); text-decoration: none; font-size: 11px; font-weight: 600; gap: 2px;
}
.bottom-nav a.active { color: var(--accent); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 20px 16px; }
.hero {
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.hero h1 { font-size: clamp(28px, 4vw, 44px); line-height: 1.15; margin: 8px 0 10px; letter-spacing: -.02em; }
.hero p.lead { color: var(--muted); font-size: 18px; max-width: 720px; margin: 0 0 20px; }
.search-hero {
  display: flex; gap: 8px; max-width: 760px; background: #fff;
  border: 1px solid var(--border); border-radius: 14px; padding: 8px; box-shadow: var(--shadow);
}
.search-hero input, .search-mini input {
  flex: 1; border: 0; outline: none; padding: 10px 12px; background: transparent; min-width: 0;
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.chip {
  border: 1px solid var(--border); background: #fff; border-radius: 999px;
  padding: 6px 12px; font-size: 13px; cursor: pointer; color: var(--text);
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.section { margin: 28px 0; }
.section h2 { font-size: 20px; margin: 0 0 14px; }
.grid { display: grid; gap: 14px; }
.grid-4 { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.course-card { cursor: pointer; display: flex; flex-direction: column; gap: 8px; min-height: 160px; }
.course-card:hover { border-color: #c5d6ea; }
.meta { display: flex; flex-wrap: wrap; gap: 8px; font-size: 12px; color: var(--muted); }
.badge { background: var(--accent-soft); color: var(--accent-2); border-radius: 999px; padding: 2px 8px; font-weight: 600; }
.progress { height: 8px; background: #eef1f5; border-radius: 99px; overflow: hidden; }
.progress > span { display: block; height: 100%; background: var(--accent); width: 0; }
.lesson-layout { display: grid; gap: 16px; }
@media (min-width: 1024px) {
  .lesson-layout { grid-template-columns: 260px 1fr 280px; align-items: start; }
}
.curriculum, .side-panel { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; }
.curriculum a { display: block; padding: 8px; border-radius: 8px; color: var(--text); text-decoration: none; font-size: 14px; }
.curriculum a.active { background: var(--accent-soft); }
.lesson-body { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.lesson-body h1 { margin-top: 0; font-size: 26px; }
.kp { background: #f6f8fb; border-left: 3px solid var(--accent); padding: 12px 14px; margin: 16px 0; }
.nav-lesson { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 24px; }
.quiz-opt { display: block; width: 100%; text-align: left; margin: 8px 0; padding: 12px; border-radius: 10px; border: 1px solid var(--border); background: #fff; cursor: pointer; }
.quiz-opt.correct { border-color: var(--ok); background: var(--ok-bg); }
.quiz-opt.wrong { border-color: var(--danger); background: #fdecec; }
.modal-bg { position: fixed; inset: 0; background: rgba(16,24,40,.45); display: flex; align-items: center; justify-content: center; z-index: 80; padding: 16px; }
.modal { background: #fff; border-radius: 16px; max-width: 480px; width: 100%; padding: 20px; max-height: 90vh; overflow: auto; }
.field { display: flex; flex-direction: column; gap: 6px; margin: 10px 0; }
.field input, .field select, .field textarea {
  border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; width: 100%;
}
.toast { position: fixed; bottom: 80px; left: 50%; transform: translateX(-50%); background: #152033; color: #fff; padding: 10px 14px; border-radius: 10px; z-index: 90; font-size: 14px; }
.empty { text-align: center; padding: 40px 16px; color: var(--muted); }
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
.tutor-log { max-height: 240px; overflow: auto; font-size: 14px; }
.tutor-msg { margin: 8px 0; padding: 8px 10px; border-radius: 10px; background: #f4f6f9; }
.tutor-msg.user { background: var(--accent-soft); }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.hidden { display: none !important; }
.low-data img.optional { display: none; }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}
.mobile-drawer {
  position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 70; display: none;
}
.mobile-drawer.open { display: block; }
.drawer-panel { background: #fff; width: min(320px, 90vw); height: 100%; padding: 16px; }
.drawer-panel a { display: block; padding: 10px 0; color: var(--text); text-decoration: none; font-weight: 600; }
.cert { border: 8px solid var(--accent-2); padding: 32px; text-align: center; background: #fff; }
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { border-bottom: 1px solid var(--border); padding: 8px; text-align: left; }
.install-banner { background: var(--accent-soft); border: 1px solid #c5d6ea; padding: 10px 16px; display: flex; gap: 10px; align-items: center; justify-content: space-between; }

/* v1.1 audit refinements */
html,body,.hero,.card,.lesson-body,.curriculum,.side-panel,.app-header,.bottom-nav,.drawer-panel{background:#fff;}
.saved-mark{color:#b7791f;font-size:13px}.count-pill{display:inline-block;min-width:28px;padding:2px 8px;border:1px solid var(--border);border-radius:999px;font-size:12px;color:var(--muted);vertical-align:middle}
.activity-list p{padding:9px 0;margin:0;border-bottom:1px solid var(--border)}
pre{max-width:100%;overflow:auto;background:#f7f8fa;border:1px solid var(--border);border-radius:10px;padding:12px}
.lesson-html{overflow-wrap:anywhere}.lesson-html table{display:block;max-width:100%;overflow:auto}
button:disabled{opacity:.6;cursor:not-allowed}.install-banner{position:relative;z-index:50;background:#fff}
@media(max-width:899px){.header-actions .btn-ghost{display:none}.header-actions .btn{padding:7px 10px}.logo span{font-size:15px}.wrap{padding-left:14px;padding-right:14px}}
@media(max-width:420px){.header-inner{gap:8px;padding:0 10px}.logo img{width:28px;height:28px}.logo span{font-size:14px}.header-actions .btn{font-size:12px;padding:7px 8px}.course-card{min-height:0}.grid-3,.grid-4{grid-template-columns:1fr}.hero p.lead{font-size:16px}.search-hero{flex-direction:column}.search-hero .btn{width:100%}}


/* v1.2 global curriculum */
.curriculum-hero{padding:28px 0 14px;max-width:900px}.curriculum-hero h1{font-size:clamp(2rem,5vw,3.6rem);line-height:1.05;margin:.45rem 0 1rem}.curriculum-stats{margin-top:18px;padding:14px 16px;border:1px solid #dbe3ef;border-radius:14px;background:#fff}.curriculum-note{margin:14px 0;padding:12px 14px;border-left:4px solid #2563eb;background:#f8fbff;border-radius:8px}.lesson-html h3{margin-top:1.4rem}.lesson-html p,.lesson-html li{line-height:1.72}.lesson-html .kp{margin:16px 0;padding:14px 16px;border:1px solid #dbe3ef;border-radius:12px;background:#fafcff}.lesson-html code{font-size:.95em}.course-card .badge+.badge{margin-left:6px}@media(max-width:760px){.curriculum-hero{padding-top:16px}.curriculum-stats{font-size:.93rem}}

/* v1.3 Nigeria curriculum */
.nigeria-feature .card{border-left:5px solid #0b3a6e}.nigeria-hero{max-width:980px}.nigeria-notice{margin:8px 0 28px}.class-jump{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 20px}.class-jump .chip{text-decoration:none}.nigeria-class-block{scroll-margin-top:90px;margin:24px 0 34px}.nigeria-class-block>h3{font-size:1.45rem;margin:0 0 12px}.course-card .badge{white-space:normal}

/* v1.5 ETHAN Voice */
.voice-fab{
  position:fixed;right:18px;bottom:82px;z-index:65;min-width:54px;height:54px;padding:0 16px;
  display:flex;align-items:center;justify-content:center;gap:7px;border-radius:999px;
  border:1px solid #c9d7e8;background:#fff;color:#0b3a6e;font-weight:800;box-shadow:0 8px 24px rgba(15,23,42,.16);cursor:pointer
}
.voice-fab:hover{background:#f6f9fd}.voice-fab.active{background:#0b3a6e;color:#fff;border-color:#0b3a6e}.voice-fab.listening{outline:4px solid rgba(37,99,235,.18)}
.voice-fab span:first-child{font-size:21px}.voice-fab-label{font-size:13px}
.voice-panel{border:1px solid var(--border);border-radius:14px;padding:14px;background:#fff;margin:14px 0}
.voice-status{font-weight:800;color:var(--accent-2)}.voice-transcript{min-height:42px;padding:10px;border-radius:10px;background:#f7f9fc;color:var(--muted);margin:8px 0 12px}
.voice-controls{display:flex;gap:8px;flex-wrap:wrap}.voice-help{font-size:13px;color:var(--muted);line-height:1.55}
@media(min-width:900px){.voice-fab{bottom:24px}}
@media(max-width:420px){.voice-fab{right:12px;bottom:76px;min-width:50px;height:50px;padding:0 13px}.voice-fab-label{display:none}}

/* v1.8 ETHAN Voice */
#voiceFab{
 position:fixed;right:18px;bottom:18px;z-index:10000;
 border:0;border-radius:999px;padding:12px 16px;
 font:inherit;font-weight:800;box-shadow:0 8px 28px rgba(0,0,0,.18);
 cursor:pointer;background:#fff;color:#0a4db3;
}
#voiceFab[aria-pressed="true"]{outline:3px solid rgba(10,77,179,.2);}
@media(max-width:640px){#voiceFab{right:12px;bottom:12px;padding:11px 14px}}

/* v1.9 Automatic course narration */
#narrationBar{
 position:fixed;left:50%;transform:translateX(-50%);bottom:16px;z-index:9999;
 display:flex;align-items:center;gap:8px;flex-wrap:wrap;
 max-width:min(94vw,820px);padding:10px 12px;border-radius:16px;
 background:rgba(255,255,255,.97);box-shadow:0 10px 34px rgba(0,0,0,.18);
 border:1px solid rgba(0,0,0,.08);backdrop-filter:blur(10px);
}
#narrationBar button{border:1px solid rgba(0,0,0,.12);background:#fff;border-radius:10px;padding:8px 10px;font:inherit;font-weight:700;cursor:pointer}
#narrationBar [data-auto-narrate][aria-pressed="true"]{background:#eef6ff}
.narration-label{font-weight:900}.narration-status{font-size:.9rem;opacity:.72}
@media(max-width:640px){#narrationBar{bottom:68px;justify-content:center;font-size:.9rem}}


/* =========================================================
   ETHAN Learn v2.0 — structured professional interface
   ========================================================= */
:root{
  --bg:#f4f7fb;--surface:#fff;--text:#132238;--muted:#66758a;--border:#dfe7f1;
  --accent:#1263d6;--accent-2:#082f63;--accent-soft:#edf5ff;
  --radius:16px;--shadow:0 8px 28px rgba(18,45,82,.08);
  --shadow-hover:0 16px 40px rgba(18,45,82,.14);--max:1240px;
}
body{background:linear-gradient(180deg,#f7faff 0,#f4f7fb 260px);overflow-x:hidden}
.app-header{height:72px;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);box-shadow:0 1px 0 rgba(9,47,99,.08)}
.header-inner{max-width:1480px;gap:18px}
.logo img{width:36px;height:36px}.brand-lockup{display:flex;flex-direction:column;line-height:1.08}.brand-lockup small{font-size:10px;color:var(--muted);font-weight:600;margin-top:3px}
.nav-desktop{align-items:center;gap:2px;min-width:0}.nav-desktop>a,.nav-more summary{padding:9px 10px;border-radius:10px;font-size:13px;font-weight:700;cursor:pointer;white-space:nowrap}
.nav-more{position:relative}.nav-more summary{list-style:none;color:var(--text)}.nav-more summary::-webkit-details-marker{display:none}
.nav-popover{position:absolute;right:0;top:44px;width:220px;background:#fff;border:1px solid var(--border);border-radius:14px;padding:8px;box-shadow:var(--shadow-hover);display:grid;z-index:80}
.nav-popover a{padding:10px;border-radius:9px;color:var(--text);font-weight:650}.nav-popover a:hover{background:var(--accent-soft);text-decoration:none}
.search-mini{height:42px;align-items:center;border:1px solid var(--border);border-radius:12px;padding:0 10px;background:#f8fbff;max-width:290px}
.search-mini input{width:100%;border:0;outline:0;background:transparent;padding:8px}
.header-actions{white-space:nowrap}
.hero{border:0;background:linear-gradient(135deg,#061f43 0%,#0b4f9d 58%,#1976df 100%);color:#fff;position:relative;overflow:hidden}
.hero:after{content:"";position:absolute;width:440px;height:440px;border-radius:50%;background:rgba(255,255,255,.07);right:-120px;top:-220px}
.hero .wrap{position:relative;z-index:1;padding-top:58px;padding-bottom:58px}.hero p.lead{color:#d9e8fb;max-width:760px}.hero h1{max-width:820px;font-size:clamp(34px,5vw,60px)}
.hero .search-hero{max-width:820px;border:0;box-shadow:0 18px 48px rgba(0,0,0,.18)}.hero .chip{background:rgba(255,255,255,.11);border-color:rgba(255,255,255,.22);color:#fff}.hero .chip:hover{background:#fff;color:var(--accent-2)}
.wrap{padding:28px 20px}.section{margin:34px 0}.section h2{font-size:24px;letter-spacing:-.015em}
.card{border-color:#e3eaf3;border-radius:16px;box-shadow:var(--shadow);padding:18px}
.course-card{min-height:250px;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;overflow:hidden}
.course-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#bfd4ee}
.course-card h3{font-size:18px;line-height:1.3;margin:10px 0 8px}.course-desc{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;min-height:63px}
.course-topline,.course-progress-row{display:flex;justify-content:space-between;gap:10px;align-items:center;font-size:12px;color:var(--muted)}
.course-subject{font-weight:800;color:var(--accent-2);text-transform:uppercase;letter-spacing:.04em}.course-hours{white-space:nowrap}
.course-tags{display:flex;gap:6px;flex-wrap:wrap;margin:12px 0}.badge{border-radius:999px;padding:5px 9px;background:#edf4fd;color:#234b78;font-weight:800;font-size:11px}.badge-ng{background:#edf9f1;color:#1f6a3c}
.course-progress-row{margin-top:auto;padding-top:8px;font-weight:700}.progress{height:7px;background:#e8eef6;border-radius:99px;overflow:hidden}.progress span{display:block;height:100%;background:linear-gradient(90deg,#1263d6,#27a5f9);border-radius:99px}
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin:10px 0 24px}.page-head h1{font-size:clamp(30px,4vw,46px);margin:2px 0 6px}.page-head p{color:var(--muted);margin:0}.eyebrow,.course-kicker{font-size:12px;letter-spacing:.12em;font-weight:900;color:var(--accent);text-transform:uppercase}
.breadcrumbs{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:16px}
.course-overview{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:24px;padding:30px;background:linear-gradient(135deg,#fff,#f4f9ff);border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow)}
.course-overview h1{font-size:clamp(32px,4.5vw,52px);line-height:1.08;margin:8px 0 12px}.course-lead{font-size:18px;color:var(--muted);max-width:820px}.course-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:18px}
.course-progress-card{display:flex;flex-direction:column;justify-content:center;background:#fff;border:1px solid var(--border);border-radius:18px;padding:20px;text-align:center}
.progress-ring{width:132px;height:132px;border-radius:50%;margin:0 auto 12px;display:grid;place-content:center;text-align:center;background:conic-gradient(var(--accent) calc(var(--pct)*1%),#e7eef7 0);position:relative}
.progress-ring:before{content:"";position:absolute;inset:10px;background:#fff;border-radius:50%}.progress-ring>*{position:relative}.progress-ring strong{font-size:26px}.progress-ring span{font-size:12px;color:var(--muted)}
.course-tabs{display:flex;gap:6px;overflow:auto;margin:24px 0 16px;border-bottom:1px solid var(--border);scrollbar-width:none}.course-tabs::-webkit-scrollbar{display:none}
.tab-btn{border:0;background:transparent;padding:12px 14px;font-weight:800;color:var(--muted);cursor:pointer;border-bottom:3px solid transparent;white-space:nowrap}.tab-btn.active{color:var(--accent);border-bottom-color:var(--accent)}
.tab-panel{display:none}.tab-panel.active{display:block}.content-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.check-list li{margin:8px 0}
.module-list{display:grid;gap:10px}.module-accordion{background:#fff;border:1px solid var(--border);border-radius:14px;overflow:hidden;box-shadow:0 4px 12px rgba(18,45,82,.04)}
.module-accordion summary{cursor:pointer;display:flex;justify-content:space-between;gap:10px;padding:16px 18px;font-size:15px}.module-accordion summary small{color:var(--muted);white-space:nowrap}.module-accordion[open] summary{background:#f8fbff;border-bottom:1px solid var(--border)}
.module-lessons{display:grid}.lesson-row{display:grid;grid-template-columns:36px 1fr auto;gap:12px;align-items:center;padding:12px 18px;border-bottom:1px solid #eef2f7;color:var(--text)}.lesson-row:hover{background:#f8fbff;text-decoration:none}.lesson-row small{display:block;color:var(--muted);margin-top:3px}.lesson-number{width:30px;height:30px;border-radius:9px;display:grid;place-content:center;background:var(--accent-soft);color:var(--accent);font-weight:900}
.lesson-layout{grid-template-columns:260px minmax(0,1fr) 300px!important;align-items:start;gap:18px!important}.curriculum,.side-panel{position:sticky;top:90px;max-height:calc(100vh - 112px);overflow:auto;border-radius:16px}.lesson-body{background:#fff;border:1px solid var(--border);border-radius:18px;padding:30px;box-shadow:var(--shadow)}.lesson-html{font-size:16.5px;line-height:1.72}.lesson-html h2,.lesson-html h3{color:var(--accent-2)}.nav-lesson{position:sticky;bottom:10px;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);padding:10px;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow);z-index:4}
.filters{display:flex;gap:10px;flex-wrap:wrap;background:#fff;padding:12px;border:1px solid var(--border);border-radius:14px;margin-bottom:18px}.filters select{min-width:170px;border:1px solid var(--border);border-radius:10px;padding:9px 11px;background:#fff}
.load-more-wrap{text-align:center;margin:22px 0}.count-pill{display:inline-grid;place-content:center;min-width:24px;height:24px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:11px;padding:0 7px}
.stat-row{grid-template-columns:repeat(4,1fr)!important}.stat-row .card{background:linear-gradient(180deg,#fff,#f8fbff)}
.mobile-drawer{background:rgba(5,19,38,.52);backdrop-filter:blur(4px)}.drawer-panel{width:min(88vw,360px);padding:0;overflow:auto}.drawer-head{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;padding:16px 18px;background:#fff;border-bottom:1px solid var(--border);z-index:2}.drawer-group{padding:14px}.drawer-group>span{display:block;font-size:10px;letter-spacing:.14em;font-weight:900;color:#8190a3;margin:6px 10px}.drawer-group a{display:block;padding:11px 12px;border-radius:10px;color:var(--text);font-weight:700}.drawer-group a:hover{background:var(--accent-soft);text-decoration:none}
.bottom-nav{height:68px;box-shadow:0 -6px 24px rgba(18,45,82,.08)}.bottom-nav a span{font-size:19px;line-height:1}.bottom-nav a.active{background:#f4f8ff}
.error-state,.empty{background:#fff;border:1px dashed #cbd8e8;border-radius:16px;padding:26px;text-align:center;color:var(--muted)}
#narrationBar{left:auto!important;right:18px!important;transform:none!important;bottom:80px!important;max-width:min(94vw,720px)!important;border-radius:18px!important}
#voiceFab{bottom:18px!important;right:18px!important}
@media(max-width:1180px){.nav-desktop>a{display:none}.nav-desktop .nav-more{display:block}.search-mini{max-width:330px}}
@media(max-width:900px){.header-actions{display:none}.search-mini{display:none}.lesson-layout{grid-template-columns:1fr!important}.curriculum,.side-panel{position:static;max-height:none}.course-overview{grid-template-columns:1fr}.course-progress-card{display:grid;grid-template-columns:150px 1fr;align-items:center;text-align:left}.content-grid{grid-template-columns:1fr}.wrap{padding:22px 14px 90px}.nav-lesson{bottom:76px}}
@media(max-width:600px){.course-overview{padding:20px;border-radius:16px}.course-overview h1{font-size:34px}.course-progress-card{display:block;text-align:center}.lesson-body{padding:20px 16px}.filters{display:grid}.filters select{width:100%}.stat-row{grid-template-columns:repeat(2,1fr)!important}.page-head h1{font-size:34px}#narrationBar{left:10px!important;right:10px!important;bottom:76px!important;justify-content:center}.course-tabs{margin-left:-14px;margin-right:-14px;padding:0 14px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}


/* =========================================================
   ETHAN Learn v2.2 — Human-style ETHAN Instructor
   ========================================================= */
.ethan-instructor{
 position:fixed;right:18px;bottom:78px;z-index:9998;width:min(560px,calc(100vw - 28px));
 background:rgba(255,255,255,.98);border:1px solid #d7e4f3;border-radius:22px;
 box-shadow:0 20px 54px rgba(10,42,82,.2);overflow:hidden;backdrop-filter:blur(14px)
}
.instructor-stage{display:grid;grid-template-columns:160px 1fr;min-height:190px}
.instructor-avatar{position:relative;background:linear-gradient(155deg,#082f63,#1263d6);overflow:hidden;min-height:190px}
.avatar-face{position:absolute;width:72px;height:80px;border-radius:44% 44% 48% 48%;background:#b9784d;left:44px;top:28px;box-shadow:inset 0 -4px 0 rgba(0,0,0,.08)}
.avatar-hair{position:absolute;width:76px;height:34px;border-radius:50% 50% 30% 30%;background:#17202d;left:42px;top:19px;z-index:2}
.eye{position:absolute;width:7px;height:7px;border-radius:50%;background:#17202d;top:31px}.eye.left{left:20px}.eye.right{right:20px}
.mouth{position:absolute;width:22px;height:5px;border-radius:0 0 20px 20px;background:#5b2623;left:25px;top:55px;transform-origin:center}
.avatar-body{position:absolute;width:104px;height:100px;border-radius:42px 42px 0 0;background:#fff;left:28px;top:104px}
.avatar-body:after{content:"";position:absolute;width:18px;height:46px;background:#1263d6;left:43px;top:0;clip-path:polygon(50% 0,100% 20%,68% 100%,32% 100%,0 20%)}
.arm{position:absolute;width:22px;height:72px;background:#b9784d;border-radius:16px;top:14px;transform-origin:top center}.arm-left{left:-8px;transform:rotate(18deg)}.arm-right{right:-8px;transform:rotate(-28deg)}
.teaching-board{position:absolute;left:8px;right:8px;bottom:8px;background:rgba(4,24,51,.82);border:1px solid rgba(255,255,255,.24);color:#fff;border-radius:10px;padding:6px 8px;font-size:9px;display:flex;justify-content:space-between;align-items:center;z-index:4}.teaching-board b{font-size:11px}
.instructor-content{padding:15px 16px;min-width:0}.instructor-head{display:flex;align-items:center;justify-content:space-between;gap:10px}.instructor-head>div{display:flex;flex-direction:column}.instructor-head strong{font-size:16px;color:#082f63}.instructor-head span{font-size:11px;color:#61748c;font-weight:700}
.instructor-collapse{border:0;background:#edf4fd;width:30px;height:30px;border-radius:9px;cursor:pointer}
.instructor-caption{min-height:64px;max-height:112px;overflow:auto;margin:10px 0;color:#304258;line-height:1.48;font-size:13.5px}
.instructor-controls{display:flex;flex-wrap:wrap;gap:7px}.instructor-controls .btn,.instructor-controls select{font-size:12px;padding:7px 9px}.instructor-controls select{border:1px solid var(--border);border-radius:9px;background:#fff;max-width:150px}
.ethan-instructor[data-speaking="1"] .mouth{animation:ethan-talk .28s ease-in-out infinite alternate}
.ethan-instructor[data-speaking="1"] .arm-right{animation:ethan-gesture 1.7s ease-in-out infinite alternate}
.ethan-instructor[data-mode="check"] .teaching-board:after{content:"?";font-size:18px;font-weight:900;color:#9dd3ff}
.ethan-instructor[data-mode="apply"] .teaching-board:after{content:"TRY";font-size:10px;font-weight:900;color:#bdf3ca}
.ethan-instructor.collapsed{width:190px}.ethan-instructor.collapsed .instructor-content{display:none}.ethan-instructor.collapsed .instructor-stage{grid-template-columns:1fr}.ethan-instructor.collapsed .instructor-avatar{min-height:124px}.ethan-instructor.collapsed .avatar-body{top:78px}.ethan-instructor.collapsed .avatar-face{top:16px}.ethan-instructor.collapsed .avatar-hair{top:8px}
@keyframes ethan-talk{from{height:4px;transform:scaleX(.75)}to{height:13px;transform:scaleX(1.1);border-radius:30% 30% 50% 50%}}
@keyframes ethan-gesture{from{transform:rotate(-28deg)}to{transform:rotate(-62deg) translateY(-3px)}}
.instructor-side{border-color:#cfe1f5;background:linear-gradient(180deg,#f7fbff,#fff)}
body:has(.lesson-body) #narrationBar{display:none!important}
@media(max-width:700px){
 .ethan-instructor{left:10px;right:10px;bottom:78px;width:auto;border-radius:17px}
 .instructor-stage{grid-template-columns:96px 1fr;min-height:160px}.instructor-avatar{min-height:160px}
 .avatar-face{transform:scale(.8);transform-origin:top left;left:27px}.avatar-hair{transform:scale(.8);transform-origin:top left;left:25px}.avatar-body{transform:scale(.78);transform-origin:top left;left:14px}
 .teaching-board{font-size:7px}.instructor-caption{max-height:82px;font-size:12.5px}.instructor-controls select{max-width:130px}
}
@media(prefers-reduced-motion:reduce){.ethan-instructor .mouth,.ethan-instructor .arm-right{animation:none!important}}


/* =========================================================
   ETHAN Learn v3.0 — World Class Learning Experience
   ========================================================= */
.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.world-class-strip{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin:2px 0 28px}
.world-class-strip>div{background:#fff;border:1px solid var(--border);border-radius:14px;padding:14px;box-shadow:0 6px 18px rgba(16,45,82,.05)}
.world-class-strip strong{display:block;color:var(--accent-2);font-size:15px}.world-class-strip span{display:block;color:var(--muted);font-size:11px;margin-top:3px}
.resume-learning{margin-top:14px;background:#fff!important;color:#082f63!important;border-color:rgba(255,255,255,.5)!important}
.world-learning-flow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr auto 1fr;gap:10px;align-items:center;padding:15px 17px;background:#071f42;color:#fff;border-radius:16px;margin:18px 0}
.world-learning-flow div{min-width:0}.world-learning-flow b,.world-learning-flow span{display:block}.world-learning-flow b{font-size:13px}.world-learning-flow span{font-size:10px;color:#bcd3ed;margin-top:2px}.world-learning-flow i{font-style:normal;color:#62b0ff}
.learning-journey{display:flex;gap:6px;overflow:auto;margin:-8px 0 22px;padding-bottom:3px}.journey-step{white-space:nowrap;border:1px solid var(--border);background:#f8fbff;border-radius:999px;padding:6px 10px;font-size:11px;font-weight:800;color:#6a788b}.journey-step.done{background:#eaf4ff;color:#0d5abd;border-color:#bed8f5}
.focus-mode-btn{position:fixed;left:18px;bottom:18px;z-index:9990;border:1px solid var(--border);background:#fff;border-radius:999px;padding:10px 14px;font-weight:800;box-shadow:var(--shadow);cursor:pointer}
.lesson-focus .app-header,.lesson-focus .bottom-nav,.lesson-focus .curriculum,.lesson-focus .side-panel,.lesson-focus #voiceFab,.lesson-focus #ethan-status{display:none!important}
.lesson-focus .lesson-layout{display:block!important;max-width:900px;margin:auto}.lesson-focus .lesson-body{max-width:900px;margin:auto}.lesson-focus main#app{padding-top:12px}
.ethan-status{position:fixed;left:16px;top:78px;z-index:35;display:flex;align-items:center;gap:5px;font-size:10px;font-weight:800;color:#52677f;background:rgba(255,255,255,.92);border:1px solid var(--border);border-radius:999px;padding:5px 8px;backdrop-filter:blur(8px)}
.is-offline .ethan-status [data-net]{color:#b45309}.status-dot{opacity:.45}
.world-dashboard-banner{display:flex;justify-content:space-between;align-items:center;gap:22px;background:linear-gradient(135deg,#071f42,#0b5ab5);color:#fff;border-radius:20px;padding:22px 24px;margin:0 0 24px;box-shadow:0 15px 40px rgba(8,47,99,.18)}
.world-dashboard-banner h2{margin:4px 0 6px}.world-dashboard-banner p{margin:0;color:#cfe0f4}.world-dashboard-banner .eyebrow{color:#8bc7ff}
.world-mini-stats{display:flex;gap:9px;flex-wrap:wrap}.world-mini-stats span{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);border-radius:12px;padding:10px 12px;font-size:11px}.world-mini-stats b{font-size:18px;margin-right:4px}

/* Instructor Pro */
.ethan-instructor{width:min(670px,calc(100vw - 28px));border-radius:24px;box-shadow:0 24px 70px rgba(5,30,68,.25)}
.instructor-stage{grid-template-columns:170px minmax(0,1fr)}
.instructor-content{padding:16px 17px}
.instructor-meter{height:5px;background:#e8eef6;border-radius:99px;overflow:hidden;margin:10px 0 8px}.instructor-meter span{display:block;height:100%;width:0;background:linear-gradient(90deg,#1263d6,#28a8ff);transition:width .25s ease}
.instructor-segment{display:flex;justify-content:space-between;gap:10px;align-items:center}.instructor-segment b{font-size:12px;color:#0b4f9d}.instructor-segment small{font-size:10px;color:#708198}
.instructor-main-controls{margin-top:6px}.instructor-main-controls .btn{font-size:11.5px}
.instructor-options{margin-top:9px;border-top:1px solid #e6edf5;padding-top:8px}.instructor-options summary{cursor:pointer;font-size:11px;font-weight:900;color:#52677f}
.instructor-option-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;margin:9px 0}.instructor-option-grid label{font-size:9px;font-weight:800;color:#6b7b8f}.instructor-option-grid select{display:block;width:100%;margin-top:3px;border:1px solid var(--border);border-radius:8px;padding:6px;background:#fff;font-size:10px}
.ethan-instructor[data-mode="question"] .teaching-board:after,.ethan-instructor[data-mode="check"] .teaching-board:after{content:"THINK";font-size:9px;font-weight:900;color:#9dd3ff}
.ethan-instructor[data-mode="example"] .teaching-board:after{content:"EXAMPLE";font-size:8px;font-weight:900;color:#ffe79a}
.ethan-instructor[data-mode="exam"] .teaching-board:after{content:"EXAM";font-size:9px;font-weight:900;color:#ffd0d0}
.ethan-instructor[data-mode="recap"] .teaching-board:after{content:"RECAP";font-size:9px;font-weight:900;color:#d9c6ff}
.ethan-instructor[data-mode="done"] .teaching-board:after{content:"✓";font-size:18px;font-weight:900;color:#baf2c8}
@media(max-width:900px){
 .world-class-strip{grid-template-columns:repeat(2,1fr)}.world-learning-flow{grid-template-columns:1fr 1fr;gap:8px}.world-learning-flow i{display:none}.world-dashboard-banner{display:block}.world-mini-stats{margin-top:14px}
}
@media(max-width:700px){
 .settings-grid{grid-template-columns:1fr}.ethan-instructor{left:8px;right:8px;width:auto;bottom:76px}.instructor-stage{grid-template-columns:88px minmax(0,1fr)}.instructor-option-grid{grid-template-columns:1fr 1fr}
 .world-class-strip{grid-template-columns:1fr 1fr}.focus-mode-btn{left:10px;bottom:76px}.ethan-status{display:none}
}

.ethan-instructor,.instructor-side{display:none!important}

/* v3.2 Lesson Voice */
.lesson-listen-panel{background:linear-gradient(180deg,#f5faff,#fff);border:1px solid #cfe1f5;border-radius:14px;padding:13px;margin-bottom:12px}
.listen-head{display:flex;justify-content:space-between;gap:8px;align-items:center;font-size:13px;color:#0b3a6e}.listen-head span{font-size:10px;color:var(--muted);font-weight:700}
.listen-progress{height:5px;background:#e7eef7;border-radius:99px;overflow:hidden;margin:9px 0 11px}.listen-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,#1263d6,#27a5f9);transition:width .2s ease}
.lesson-listen-panel .voice-controls{display:flex;gap:6px;flex-wrap:wrap}.lesson-listen-panel select{width:100%;border:1px solid var(--border);border-radius:9px;padding:7px;background:#fff}

/* v4.0 Expanded academic experience */
.section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:14px}
.section-head h2{margin:4px 0 0}.eyebrow{font-size:10px;letter-spacing:.14em;font-weight:900;color:#1263d6}
.stream-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.stream-card{display:flex;flex-direction:column;gap:6px;min-height:145px;padding:17px;border:1px solid #dce7f4;border-radius:17px;background:linear-gradient(180deg,#fff,#f7fbff);text-decoration:none;color:var(--text);box-shadow:0 7px 22px rgba(12,55,102,.06)}
.stream-card:hover{transform:translateY(-2px);border-color:#a9c9ee;text-decoration:none}.stream-card>span{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:#0b3a6e;color:#fff;font-size:10px;font-weight:900;letter-spacing:.04em}
.stream-card b{font-size:15px;color:#0b3a6e}.stream-card small{color:var(--muted);line-height:1.45}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.why-grid article{background:#071f42;color:#fff;border-radius:16px;padding:17px;min-height:130px}.why-grid b{display:block;font-size:15px;margin-bottom:6px}.why-grid p{color:#c9daee;margin:0;font-size:12.5px}
.do-it-now{margin:24px 0;border:1px solid #b9d8f7;border-radius:18px;padding:18px;background:linear-gradient(145deg,#f2f8ff,#fff);box-shadow:0 10px 28px rgba(12,72,140,.06)}
.din-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.din-head h2{margin:2px 0 0;color:#0b3a6e}.din-state{font-size:10px;font-weight:800;color:#64748b;background:#fff;border:1px solid #d9e5f2;border-radius:999px;padding:5px 8px}
.din-main{font-size:15px;color:#263a52}.din-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin:12px 0}.din-grid article{background:#fff;border:1px solid #e2eaf3;border-radius:12px;padding:12px}.din-grid b{font-size:12px;color:#0b4f9d}.din-grid p{font-size:11.5px;color:#617187;margin:6px 0 0}
.din-reflect{display:block;font-size:11px;font-weight:800;color:#52677f}.din-reflect textarea{display:block;width:100%;margin-top:5px;border:1px solid var(--border);border-radius:10px;padding:9px;resize:vertical;background:#fff}.din-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.hint-box{margin:8px 0;padding:10px 12px;background:#fff8df;border:1px solid #f2d778;border-radius:10px;color:#73580d;font-size:12px}.mastery-question .quiz-hint{margin-bottom:8px}
@media(max-width:980px){.stream-grid{grid-template-columns:repeat(2,1fr)}.why-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:650px){.stream-grid,.why-grid,.din-grid{grid-template-columns:1fr}.section-head{align-items:flex-start;flex-direction:column}.stream-card{min-height:auto}}

/* v4.1 Supabase Account Experience */
.auth-shell{min-height:calc(100vh - 150px);display:grid;grid-template-columns:minmax(0,1.05fr) minmax(360px,.95fr);gap:34px;align-items:center;max-width:1120px;margin:0 auto;padding:44px 22px}
.auth-brand{min-height:560px;border-radius:28px;padding:44px;display:flex;flex-direction:column;justify-content:space-between;background:radial-gradient(circle at 88% 10%,rgba(63,169,255,.33),transparent 28%),linear-gradient(145deg,#061b39,#0b3a6e 62%,#1263d6);color:#fff;box-shadow:0 26px 80px rgba(5,30,65,.18)}
.auth-brand h1{font-size:clamp(34px,5vw,62px);line-height:1.02;max-width:780px;margin:13px 0 18px;color:#fff}.auth-brand p{color:#d8e7f7;font-size:16px;line-height:1.65;max-width:650px}
.auth-wordmark{width:min(430px,82%);height:auto;background:#fff;border-radius:18px;padding:8px}
.auth-benefits{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:24px}.auth-benefits span{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.15);border-radius:12px;padding:11px 13px;font-size:12px;font-weight:700}
.auth-card{background:#fff;border:1px solid #dce7f4;border-radius:24px;padding:28px;box-shadow:0 22px 70px rgba(9,46,92,.11)}.auth-card h1,.auth-card h2{color:#0b315f}
.auth-tabs{display:grid;grid-template-columns:1fr 1fr;background:#f0f5fb;border-radius:12px;padding:4px;margin-bottom:22px}.auth-tab{border:0;background:transparent;padding:11px;border-radius:9px;font-weight:800;color:#66778c;cursor:pointer}.auth-tab.active{background:#fff;color:#0b3a6e;box-shadow:0 3px 13px rgba(16,64,120,.1)}
.auth-pane{display:none}.auth-pane.active{display:block}.auth-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:10px}.auth-card .field{display:block;margin:12px 0;color:#3d5269;font-size:12px;font-weight:800}.auth-card input,.auth-card select{box-sizing:border-box;width:100%;margin-top:6px;border:1px solid #ccd9e8;border-radius:11px;padding:12px 13px;font:inherit;background:#fff;color:#10253e;outline:none}.auth-card input:focus,.auth-card select:focus{border-color:#1263d6;box-shadow:0 0 0 3px rgba(18,99,214,.1)}
.password-wrap{position:relative}.password-wrap input{padding-right:66px}.password-toggle{position:absolute;right:7px;top:12px;border:0;background:#eef4fb;color:#0b4f9d;border-radius:8px;padding:6px 9px;font-size:10px;font-weight:800;cursor:pointer}
.auth-submit{width:100%;margin-top:9px;min-height:44px}.forgot-link{width:100%;margin-top:4px}.auth-message{min-height:20px;margin-top:10px;padding:0;font-size:12px;line-height:1.45}.auth-message.success,.auth-message.error{padding:10px 12px;border-radius:10px}.auth-message.success{background:#eaf9f0;color:#176b3a;border:1px solid #bfe8ce}.auth-message.error{background:#fff0f0;color:#9a2b2b;border:1px solid #efc7c7}
.password-rules{display:grid;gap:4px;color:#6c7c90;font-size:10.5px;margin:7px 0 12px}.auth-privacy{font-size:10px;color:#7a899a;border-top:1px solid #edf1f6;padding-top:13px;margin-top:18px}.account-ready{text-align:center}.account-avatar{width:76px;height:76px;border-radius:22px;margin:0 auto 12px;display:grid;place-items:center;background:linear-gradient(145deg,#0b3a6e,#28a8ff);color:#fff;font-size:30px;font-weight:900}.auth-actions{display:flex;gap:8px;justify-content:center;margin:18px 0}.auth-shell-single{grid-template-columns:minmax(320px,520px);justify-content:center}.auth-mini-logo{display:block;margin:0 auto 16px}
@media(max-width:850px){.auth-shell{grid-template-columns:1fr;padding-top:24px}.auth-brand{min-height:390px;padding:28px}.auth-brand h1{font-size:38px}.auth-grid-2{grid-template-columns:1fr}.auth-benefits{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.auth-shell{padding:12px}.auth-brand{min-height:330px;border-radius:20px;padding:22px}.auth-brand h1{font-size:31px}.auth-card{padding:20px;border-radius:19px}.auth-benefits{grid-template-columns:1fr}}

/* v4.2 account-gated learning */
.auth-required-note{border-left:4px solid var(--accent,#1263d6);padding-left:12px}