@font-face{font-family:'Source Sans 3';src:url('fonts/SourceSans3-VF.woff2') format('woff2');font-weight:200 900;font-display:swap}
@font-face{font-family:'Bodoni Moda';src:url('fonts/BodoniModa-VF.woff2') format('woff2');font-weight:400 900;font-display:swap}
@font-face{font-family:'Bodoni Moda';font-style:italic;src:url('fonts/BodoniModa-Italic-VF.woff2') format('woff2');font-weight:400 900;font-display:swap}
:root{
  --bg:#05080f;
  --bg-2:#0a0f1c;
  --surface:#0e1525;
  --surface-2:#141d33;
  --surface-3:#1a2540;
  --border:rgba(255,255,255,.06);
  --border-2:rgba(255,255,255,.1);
  --text:#eef2ff;
  --text-2:#a9b3cf;
  --text-3:#6b7693;
  --accent:#00d4ff;
  --accent-2:#7b5cff;
  --accent-3:#ffb547;
  --success:#34d399;
  --danger:#ff5b6b;
  --warning:#ffb547;
  --info:#60a5fa;
  --critical:#ff2d6a;
  --radius:18px;
  --radius-sm:12px;
  --radius-lg:24px;
  --shadow:0 8px 30px rgba(0,0,0,.4);
  --glow:0 0 40px rgba(0,212,255,.15);
  --safe-top:env(safe-area-inset-top,0px);
  --safe-bottom:env(safe-area-inset-bottom,0px);
  --sans:'Source Sans 3',-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;
  --display:'Bodoni Moda','Didot','Bodoni 72',Georgia,serif;
  --mono:ui-monospace,'SF Mono',Menlo,Consolas,monospace;
}

*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent;font-family:inherit;}
*:focus{outline:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.mono{font-family:var(--mono);letter-spacing:-.02em}

html,body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--text);
  overflow-x:hidden;
  -webkit-overflow-scrolling:touch;
  min-height:100vh;
  font-size:16px;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
}
body{
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(123,92,255,.12), transparent 60%),
    radial-gradient(1000px 500px at -10% 30%, rgba(0,212,255,.08), transparent 60%),
    var(--bg);
  background-attachment:fixed;
}

::-webkit-scrollbar{width:0;height:0}

/* ======================================
   SPLASH
====================================== */
#splash{
  position:fixed;inset:0;z-index:9999;
  background:radial-gradient(ellipse at center, #0a1428 0%, #05080f 70%);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  transition:opacity .6s ease, transform .6s ease;
}
#splash.gone{opacity:0;transform:scale(1.05);pointer-events:none}
.splash-logo{
  width:96px;height:96px;border-radius:26px;
  background:linear-gradient(135deg,#00d4ff,#7b5cff);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 30px 80px rgba(123,92,255,.45), 0 0 0 1px rgba(255,255,255,.08) inset;
  position:relative;overflow:hidden;
}
.splash-logo svg{width:60px;height:60px}
.splash-logo::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,transparent 30%,rgba(255,255,255,.15));}
.splash-title{
  margin-top:22px;font-family:var(--display);font-style:italic;font-size:2.3rem;font-weight:600;letter-spacing:0;
  background:linear-gradient(135deg,#fff,#a9b3cf);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.splash-sub{margin-top:6px;color:var(--text-3);font-size:.85rem;font-weight:400}
.splash-bar{
  margin-top:32px;width:160px;height:3px;border-radius:3px;
  background:rgba(255,255,255,.06);overflow:hidden;
}
.splash-bar::after{
  content:'';display:block;height:100%;width:40%;
  background:linear-gradient(90deg,transparent,#00d4ff,transparent);
  animation:loader 1.4s infinite;
}
@keyframes loader{0%{transform:translateX(-100%)}100%{transform:translateX(400%)}}

/* ======================================
   APP SHELL
====================================== */
.app{
  max-width:480px;margin:0 auto;min-height:100vh;
  position:relative;padding-bottom:calc(80px + var(--safe-bottom));
}

.topbar{
  position:sticky;top:0;z-index:50;
  padding:calc(14px + var(--safe-top)) 18px 14px;
  background:linear-gradient(180deg, rgba(5,8,15,.92) 60%, transparent);
  backdrop-filter:blur(20px) saturate(140%);
  -webkit-backdrop-filter:blur(20px) saturate(140%);
}
.topbar-row{display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  background:linear-gradient(135deg,#00d4ff,#7b5cff);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 20px rgba(123,92,255,.35);
}
.brand-mark svg{width:24px;height:24px}
.brand-text{display:flex;flex-direction:column;line-height:1}
.brand-title{font-family:var(--display);font-style:italic;font-size:1.4rem;font-weight:600;letter-spacing:0}
.brand-sub{font-size:.7rem;color:var(--text-3);margin-top:2px;font-weight:400}

.icon-btn{
  width:38px;height:38px;border-radius:11px;
  background:var(--surface);border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-2);cursor:pointer;transition:all .2s;
}
.icon-btn:active{transform:scale(.92);background:var(--surface-2)}
.icon-btn svg{width:18px;height:18px}

.topbar-actions{display:flex;gap:8px}

/* Tabs */
.tabs{
  display:flex;gap:6px;padding:14px 18px 4px;overflow-x:auto;
  scrollbar-width:none;
}
.tabs::-webkit-scrollbar{display:none}
.tab{
  flex-shrink:0;padding:9px 16px;border-radius:99px;
  background:var(--surface);border:1px solid var(--border);
  color:var(--text-2);font-size:.85rem;font-weight:700;
  cursor:pointer;transition:all .2s;white-space:nowrap;
  display:inline-flex;align-items:center;gap:6px;
}
.tab svg{width:14px;height:14px}
.tab.active{
  background:linear-gradient(135deg,#00d4ff,#7b5cff);
  color:#05080f;border-color:transparent;
  box-shadow:0 6px 18px rgba(0,212,255,.25);
}

/* Content */
.view{display:none;padding:18px;animation:fade .35s ease}
.view.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* ======================================
   HOME / DASHBOARD
====================================== */
.hero{
  position:relative;border-radius:var(--radius-lg);
  padding:22px;margin-bottom:18px;overflow:hidden;
  background:linear-gradient(135deg, rgba(0,212,255,.12), rgba(123,92,255,.1));
  border:1px solid var(--border-2);
}
.hero::before{
  content:'';position:absolute;inset:-1px;border-radius:inherit;
  background:linear-gradient(135deg,rgba(0,212,255,.3),transparent 40%);
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  padding:1px;pointer-events:none;
}
.hero-bg{position:absolute;inset:0;opacity:.35;pointer-events:none}
.hero-bg svg{width:100%;height:100%}
.hero-content{position:relative}
.hero-eyebrow{font-size:.72rem;color:var(--accent);font-weight:800;letter-spacing:1.5px;text-transform:uppercase}
.hero-title{font-family:var(--display);font-size:1.75rem;font-weight:600;margin-top:8px;line-height:1.15;letter-spacing:-.01em}
.hero-sub{color:var(--text-2);margin-top:8px;font-size:.9rem;line-height:1.6}

.ring-wrap{display:flex;align-items:center;gap:16px;margin-top:18px}
.ring{position:relative;width:78px;height:78px;flex-shrink:0}
.ring svg{transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:7;stroke-linecap:round}
.ring .track{stroke:rgba(255,255,255,.07)}
.ring .bar{stroke:url(#ringGrad);transition:stroke-dasharray .8s ease}
.ring-label{
  position:absolute;inset:0;display:flex;flex-direction:column;
  align-items:center;justify-content:center;font-weight:800;
}
.ring-label .pct{font-size:1.1rem}
.ring-label .lbl{font-size:.55rem;color:var(--text-3);margin-top:-2px}

.ring-info{flex:1}
.ring-info .h{font-size:.95rem;font-weight:800}
.ring-info .s{font-size:.78rem;color:var(--text-2);margin-top:4px;line-height:1.5}

/* Stats grid */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:18px}
.stat{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:14px 12px;text-align:center;
}
.stat-value{font-size:1.4rem;font-weight:800;background:linear-gradient(135deg,#00d4ff,#7b5cff);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-label{font-size:.7rem;color:var(--text-3);margin-top:4px;font-weight:600}

/* Quick tiles */
.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:22px}
.tile{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:16px;cursor:pointer;
  transition:all .25s;position:relative;overflow:hidden;
}
.tile:active{transform:scale(.97)}
.tile-icon{
  width:38px;height:38px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:12px;
}
.tile-icon svg{width:20px;height:20px}
.tile-1 .tile-icon{background:rgba(0,212,255,.15);color:#00d4ff}
.tile-2 .tile-icon{background:rgba(123,92,255,.15);color:#7b5cff}
.tile-3 .tile-icon{background:rgba(255,181,71,.15);color:#ffb547}
.tile-4 .tile-icon{background:rgba(255,91,107,.15);color:#ff5b6b}
.tile h4{font-size:.95rem;font-weight:800;margin-bottom:2px}
.tile p{font-size:.72rem;color:var(--text-3);font-weight:500}

.section-h{
  display:flex;align-items:center;justify-content:space-between;
  margin:6px 0 12px;
}
.section-h h2{font-size:1.05rem;font-weight:800;display:flex;align-items:center;gap:8px}
.section-h h2 svg{width:18px;height:18px;color:var(--accent)}
.section-h .more{font-size:.78rem;color:var(--accent);font-weight:700;cursor:pointer}

/* Pattern of the day */
.pod{
  background:linear-gradient(135deg, rgba(255,45,106,.08), rgba(123,92,255,.08));
  border:1px solid var(--border-2);border-radius:var(--radius-lg);
  padding:18px;margin-bottom:22px;position:relative;overflow:hidden;
}
.pod-eyebrow{font-size:.7rem;color:var(--critical);font-weight:800;letter-spacing:1.2px}
.pod h3{font-size:1.15rem;font-weight:800;margin:6px 0}
.pod-desc{font-size:.82rem;color:var(--text-2);line-height:1.6;margin-bottom:12px}

/* ======================================
   LESSONS
====================================== */
.lesson-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:18px;margin-bottom:12px;
  cursor:pointer;transition:all .25s;position:relative;
  display:flex;gap:14px;align-items:flex-start;
}
.lesson-card:active{transform:scale(.98)}
.lesson-card.done{border-color:rgba(52,211,153,.3);background:linear-gradient(135deg,rgba(52,211,153,.04),var(--surface))}
.lesson-num{
  width:46px;height:46px;border-radius:14px;flex-shrink:0;
  background:var(--surface-2);display:flex;align-items:center;justify-content:center;
  font-weight:800;color:var(--accent);font-size:1rem;
  border:1px solid var(--border);
}
.lesson-card.done .lesson-num{
  background:linear-gradient(135deg,#34d399,#10b981);color:#062417;border-color:transparent;
}
.lesson-info{flex:1;min-width:0}
.lesson-title{font-size:1rem;font-weight:800;margin-bottom:4px;line-height:1.3}
.lesson-desc{font-size:.8rem;color:var(--text-2);line-height:1.55}
.lesson-meta{display:flex;gap:14px;margin-top:10px;color:var(--text-3);font-size:.7rem}
.lesson-meta span{display:flex;align-items:center;gap:4px}
.lesson-meta svg{width:12px;height:12px}

/* Reading view */
.reader{
  position:fixed;inset:0;z-index:200;background:var(--bg);
  overflow-y:auto;-webkit-overflow-scrolling:touch;
  transform:translateY(100%);transition:transform .35s cubic-bezier(.2,.8,.2,1);
}
.reader.open{transform:translateY(0)}
.reader-header{
  position:sticky;top:0;z-index:10;
  padding:calc(12px + var(--safe-top)) 16px 12px;
  background:rgba(5,8,15,.92);backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;gap:12px;
}
.reader-title{flex:1;min-width:0}
.reader-title .t{font-size:.95rem;font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.reader-title .s{font-size:.7rem;color:var(--text-3);margin-top:2px}
.reader-progress{height:2px;background:rgba(255,255,255,.06);position:relative;overflow:hidden}
.reader-progress::after{content:'';position:absolute;inset:0;width:var(--p,0%);background:linear-gradient(90deg,#00d4ff,#7b5cff)}
.reader-body{
  max-width:480px;margin:0 auto;padding:24px 20px 120px;
}
.reader-body h3{
  font-size:1.15rem;font-weight:800;color:var(--text);
  margin:30px 0 12px;padding-left:14px;
  border-left:3px solid var(--accent);
}
.reader-body h4{font-size:1rem;font-weight:800;color:var(--accent);margin:20px 0 10px}
.reader-body p{font-size:.93rem;line-height:1.7;color:var(--text);margin-bottom:14px}
.reader-body strong{color:var(--accent-3);font-weight:700}
.reader-body ul{list-style:none;padding:0;margin:0 0 14px}
.reader-body li{
  padding:5px 0 5px 22px;position:relative;font-size:.9rem;
  line-height:1.7;color:var(--text);
}
.reader-body li::before{
  content:'';position:absolute;left:6px;top:14px;
  width:6px;height:6px;border-radius:50%;
  background:linear-gradient(135deg,#00d4ff,#7b5cff);
}

.callout{
  border-radius:var(--radius);padding:14px 16px;margin:18px 0;
  font-size:.88rem;line-height:1.7;border:1px solid;
  display:flex;gap:12px;align-items:flex-start;
}
.callout svg{width:18px;height:18px;flex-shrink:0;margin-top:2px}
.callout p{margin:0;font-size:.88rem;line-height:1.7}
.callout.tip{background:rgba(0,212,255,.06);border-color:rgba(0,212,255,.25);color:#cdeeff}
.callout.tip svg{color:var(--accent)}
.callout.warn{background:rgba(255,181,71,.06);border-color:rgba(255,181,71,.25);color:#ffe6b8}
.callout.warn svg{color:var(--warning)}
.callout.danger{background:rgba(255,45,106,.06);border-color:rgba(255,45,106,.25);color:#ffc3d0}
.callout.danger svg{color:var(--critical)}
.callout.info{background:rgba(96,165,250,.06);border-color:rgba(96,165,250,.25);color:#d0e2ff}
.callout.info svg{color:var(--info)}
.callout.gold{background:rgba(255,181,71,.06);border-color:rgba(255,181,71,.3);color:#ffe6b8}
.callout.gold svg{color:var(--accent-3)}

.kv-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:14px 0;
}
.kv{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:12px 14px;
}
.kv-k{font-size:.7rem;color:var(--text-3);font-weight:600;margin-bottom:2px}
.kv-v{font-size:1.05rem;font-weight:800;color:var(--accent)}
.kv-v.mono{font-family:var(--mono)}

.cmp-table{
  width:100%;border-collapse:separate;border-spacing:0;
  margin:16px 0;font-size:.83rem;background:var(--surface);
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);
}
.cmp-table th{
  background:var(--surface-2);padding:10px 12px;text-align:left;
  color:var(--accent);font-weight:800;font-size:.78rem;
  border-bottom:1px solid var(--border);
}
.cmp-table td{
  padding:10px 12px;border-bottom:1px solid var(--border);
  color:var(--text);line-height:1.5;
}
.cmp-table tr:last-child td{border-bottom:none}

.next-btn{
  margin-top:30px;padding:16px;border-radius:var(--radius);
  background:linear-gradient(135deg,#00d4ff,#7b5cff);
  color:#05080f;font-weight:800;font-size:1rem;
  border:none;cursor:pointer;width:100%;
  box-shadow:0 12px 30px rgba(0,212,255,.25);
  display:flex;align-items:center;justify-content:center;gap:8px;
  transition:transform .15s;
}
.next-btn:active{transform:scale(.98)}
.next-btn svg{width:18px;height:18px}

/* ======================================
   WAVEFORM CANVAS
====================================== */
.wave-card{
  background:#000;border-radius:var(--radius);
  margin:18px 0;border:1px solid rgba(0,212,255,.15);
  position:relative;overflow:hidden;
}
.wave-label{
  position:absolute;top:8px;right:10px;z-index:2;
  font-family:var(--mono);font-size:.65rem;
  color:#7af3a8;background:rgba(0,0,0,.6);
  padding:2px 8px;border-radius:6px;border:1px solid rgba(122,243,168,.2);
}
.wave-label.ch{right:auto;left:10px}
.wave-card canvas{display:block;width:100%}

/* ======================================
   PATTERNS
====================================== */
.search-box{
  display:flex;align-items:center;gap:10px;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:11px 14px;margin-bottom:14px;
}
.search-box svg{width:16px;height:16px;color:var(--text-3)}
.search-box input{
  flex:1;background:transparent;border:none;
  color:var(--text);font-size:.92rem;
}
.search-box input::placeholder{color:var(--text-3)}

.chips{display:flex;gap:8px;overflow-x:auto;margin-bottom:14px;padding-bottom:4px}
.chips::-webkit-scrollbar{display:none}
.chip{
  flex-shrink:0;padding:7px 13px;border-radius:99px;
  background:var(--surface);border:1px solid var(--border);
  color:var(--text-2);font-size:.78rem;font-weight:700;
  cursor:pointer;white-space:nowrap;transition:all .2s;
}
.chip.active{background:var(--accent);color:#05080f;border-color:transparent}

.pattern-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-lg);overflow:hidden;margin-bottom:14px;
  transition:all .25s;
}
.pattern-card:active{transform:scale(.98)}
.pattern-head{padding:16px 18px;cursor:pointer;display:flex;align-items:center;gap:12px}
.pattern-mark{
  width:42px;height:42px;border-radius:12px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:.7rem;
}
.pattern-mark svg{width:20px;height:20px}
.mark-crit{background:rgba(255,45,106,.15);color:#ff5b6b}
.mark-warn{background:rgba(255,181,71,.15);color:#ffb547}
.mark-good{background:rgba(52,211,153,.15);color:#34d399}
.mark-info{background:rgba(96,165,250,.15);color:#60a5fa}

.pattern-name{font-size:1rem;font-weight:800;margin-bottom:2px}
.pattern-fullname{font-size:.74rem;color:var(--text-3);font-weight:500}
.pattern-chev{color:var(--text-3);transition:transform .25s}
.pattern-card.open .pattern-chev{transform:rotate(180deg)}
.pattern-body{
  max-height:0;overflow:hidden;
  transition:max-height .35s ease;
}
.pattern-card.open .pattern-body{max-height:2000px}
.pattern-body-inner{padding:0 18px 18px}
.pattern-body p{font-size:.88rem;line-height:1.7;color:var(--text);margin-bottom:10px}

.tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.tag{
  padding:3px 9px;border-radius:99px;font-size:.7rem;font-weight:700;
}
.tag.crit{background:rgba(255,45,106,.15);color:#ff5b6b}
.tag.warn{background:rgba(255,181,71,.15);color:#ffb547}
.tag.good{background:rgba(52,211,153,.15);color:#34d399}
.tag.info{background:rgba(96,165,250,.15);color:#60a5fa}
.tag.neut{background:var(--surface-2);color:var(--text-2)}

.clinical-box{
  background:var(--surface-2);border-radius:var(--radius);
  padding:12px 14px;margin-top:12px;border-left:3px solid var(--accent-3);
}
.clinical-box .lbl{
  font-size:.7rem;color:var(--accent-3);font-weight:800;
  text-transform:uppercase;letter-spacing:1px;margin-bottom:4px;
}
.clinical-box p{font-size:.83rem;color:var(--text-2);line-height:1.65;margin:0}

/* ======================================
   VIEWER (Interactive EEG)
====================================== */
.viewer-frame{
  background:#000;border-radius:var(--radius-lg);
  border:1px solid rgba(0,212,255,.2);overflow:hidden;
  position:relative;margin-bottom:14px;
  box-shadow:0 0 60px rgba(0,212,255,.08);
}
.viewer-header{
  display:flex;justify-content:space-between;align-items:center;
  padding:10px 14px;font-family:var(--mono);
  font-size:.7rem;color:#7af3a8;
  border-bottom:1px solid rgba(122,243,168,.15);
}
.viewer-header .live{display:flex;align-items:center;gap:6px}
.live-dot{width:7px;height:7px;border-radius:50%;background:#ff5b6b;animation:blink 1.2s infinite}
@keyframes blink{50%{opacity:.2}}
.viewer-canvas-wrap{position:relative}
.viewer-canvas-wrap canvas{display:block;width:100%}
.channel-labels{
  position:absolute;inset:0;pointer-events:none;
  display:flex;flex-direction:column;justify-content:space-around;
  padding:8px 8px;
}
.ch-label{
  font-family:var(--mono);font-size:.62rem;
  color:rgba(122,243,168,.6);align-self:flex-start;
}

.viewer-controls{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:14px;margin-bottom:12px;
}
.ctrl-row{display:flex;gap:8px;margin-bottom:10px;overflow-x:auto;padding-bottom:4px}
.ctrl-row::-webkit-scrollbar{display:none}
.ctrl-row:last-child{margin-bottom:0}

.pat-btn{
  flex-shrink:0;padding:8px 12px;border-radius:10px;
  background:var(--surface-2);border:1px solid var(--border);
  color:var(--text-2);font-size:.78rem;font-weight:700;
  cursor:pointer;white-space:nowrap;
}
.pat-btn.active{
  background:linear-gradient(135deg,#00d4ff,#7b5cff);
  color:#05080f;border-color:transparent;
}

.knobs{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}
.knob{
  background:var(--surface-2);border:1px solid var(--border);
  border-radius:12px;padding:10px 12px;
}
.knob .lbl{font-size:.68rem;color:var(--text-3);font-weight:700;margin-bottom:6px;display:flex;justify-content:space-between}
.knob .lbl b{color:var(--accent);font-family:var(--mono)}
.knob input[type=range]{
  -webkit-appearance:none;width:100%;height:4px;border-radius:2px;
  background:linear-gradient(90deg,#00d4ff,#7b5cff);
}
.knob input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;width:16px;height:16px;border-radius:50%;
  background:#fff;cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.4);
}

.play-bar{
  display:flex;align-items:center;gap:10px;margin-top:12px;
  background:var(--surface-2);padding:8px 12px;border-radius:12px;
  border:1px solid var(--border);
}
.play-btn{
  width:36px;height:36px;border-radius:50%;
  background:linear-gradient(135deg,#00d4ff,#7b5cff);
  border:none;color:#05080f;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
}
.play-btn svg{width:16px;height:16px}
.play-info{flex:1;font-family:var(--mono);font-size:.72rem;color:var(--text-2)}
.play-info b{color:var(--accent)}

.diagnosis-card{
  background:linear-gradient(135deg, rgba(255,181,71,.08), rgba(255,45,106,.05));
  border:1px solid rgba(255,181,71,.25);
  border-radius:var(--radius);padding:14px;
}
.diagnosis-card .lbl{font-size:.7rem;color:var(--accent-3);font-weight:800;letter-spacing:1px;text-transform:uppercase;margin-bottom:6px}
.diagnosis-card h4{font-size:1rem;font-weight:800;margin-bottom:6px}
.diagnosis-card p{font-size:.83rem;color:var(--text-2);line-height:1.65}

/* ======================================
   QUIZ
====================================== */
.quiz-cat{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:18px}
.qcat{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:16px;cursor:pointer;
}
.qcat:active{transform:scale(.97)}
.qcat-icon{
  width:36px;height:36px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:10px;
}
.qcat-icon svg{width:18px;height:18px}
.qcat h4{font-size:.9rem;font-weight:800;margin-bottom:2px}
.qcat p{font-size:.7rem;color:var(--text-3)}

.q-progress{
  display:flex;align-items:center;gap:10px;margin-bottom:14px;
  font-size:.78rem;color:var(--text-2);font-weight:600;
}
.q-progress-bar{
  flex:1;height:6px;border-radius:3px;background:rgba(255,255,255,.06);
  overflow:hidden;
}
.q-progress-bar div{
  height:100%;background:linear-gradient(90deg,#00d4ff,#7b5cff);
  transition:width .4s;
}

.q-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:20px;margin-bottom:14px;
}
.q-num{
  font-family:var(--mono);font-size:.72rem;
  color:var(--accent);margin-bottom:10px;font-weight:700;
}
.q-text{font-size:1.02rem;font-weight:700;line-height:1.65;margin-bottom:18px}
.q-image{
  background:#000;border-radius:var(--radius);
  margin-bottom:16px;border:1px solid rgba(0,212,255,.15);
  overflow:hidden;
}
.q-opts{display:flex;flex-direction:column;gap:8px}
.q-opt{
  background:var(--surface-2);border:1px solid var(--border);
  border-radius:12px;padding:13px 14px;font-size:.9rem;
  color:var(--text);cursor:pointer;text-align:left;
  transition:all .2s;display:flex;align-items:center;gap:10px;
}
.q-opt:active{transform:scale(.98)}
.q-opt .o-marker{
  width:24px;height:24px;border-radius:50%;
  background:var(--surface-3);font-size:.75rem;font-weight:800;
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
  color:var(--text-2);
}
.q-opt.correct{background:rgba(52,211,153,.12);border-color:#34d399;color:#34d399}
.q-opt.correct .o-marker{background:#34d399;color:#062417}
.q-opt.wrong{background:rgba(255,45,106,.12);border-color:#ff5b6b;color:#ff5b6b}
.q-opt.wrong .o-marker{background:#ff5b6b;color:#fff}
.q-opt.disabled{pointer-events:none;opacity:.55}
.q-explain{
  margin-top:16px;padding:14px;background:var(--surface-2);
  border-radius:12px;font-size:.85rem;line-height:1.7;color:var(--text-2);
  display:none;border-left:3px solid var(--accent-3);
}
.q-explain.show{display:block;animation:fade .3s}
.q-explain b{color:var(--accent-3)}

.score-screen{
  background:linear-gradient(135deg, rgba(0,212,255,.1), rgba(123,92,255,.08));
  border:1px solid var(--border-2);border-radius:var(--radius-lg);
  padding:30px 20px;text-align:center;
}
.score-screen .big{font-size:3rem;font-weight:800;background:linear-gradient(135deg,#00d4ff,#7b5cff);-webkit-background-clip:text;background-clip:text;color:transparent}
.score-screen p{color:var(--text-2);margin:8px 0 18px;font-size:.95rem}
.score-screen .stars{font-size:1.5rem;margin:10px 0;letter-spacing:6px}

/* ======================================
   GLOSSARY
====================================== */
.gloss-list{display:flex;flex-direction:column;gap:8px}
.gloss-item{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:14px 16px;
}
.gloss-term{font-size:.95rem;font-weight:800;color:var(--accent);margin-bottom:4px}
.gloss-ar{font-size:.78rem;color:var(--text-3);margin-bottom:6px}
.gloss-def{font-size:.85rem;color:var(--text);line-height:1.65}

/* ======================================
   BOTTOM NAV
====================================== */
.bottom-nav{
  position:fixed;bottom:0;left:0;right:0;z-index:60;
  max-width:480px;margin:0 auto;
  padding:10px 16px calc(10px + var(--safe-bottom));
  background:rgba(5,8,15,.85);
  backdrop-filter:blur(24px) saturate(160%);
  -webkit-backdrop-filter:blur(24px) saturate(160%);
  border-top:1px solid var(--border);
  display:flex;justify-content:space-around;
}
.nav-item{
  background:none;border:none;cursor:pointer;
  display:flex;flex-direction:column;align-items:center;gap:4px;
  color:var(--text-3);font-size:.65rem;font-weight:700;
  padding:6px 10px;border-radius:10px;flex:1;
}
.nav-item svg{width:22px;height:22px;transition:transform .2s}
.nav-item.active{color:var(--accent)}
.nav-item.active svg{transform:scale(1.1)}

/* Toast */
.toast{
  position:fixed;bottom:100px;left:50%;transform:translateX(-50%) translateY(120%);
  background:linear-gradient(135deg,#00d4ff,#7b5cff);color:#05080f;
  padding:12px 20px;border-radius:99px;font-weight:800;font-size:.85rem;
  z-index:1000;box-shadow:0 12px 30px rgba(0,212,255,.3);
  transition:transform .4s cubic-bezier(.3,1.5,.5,1);
  display:flex;align-items:center;gap:8px;
}
.toast svg{width:16px;height:16px}
.toast.show{transform:translateX(-50%) translateY(0)}

/* iPhone install hint */
.install-hint{
  background:linear-gradient(135deg,rgba(0,212,255,.08),rgba(123,92,255,.06));
  border:1px solid var(--border-2);border-radius:var(--radius);
  padding:14px 16px;margin-bottom:14px;font-size:.83rem;
  display:flex;gap:12px;align-items:flex-start;
  color:var(--text-2);line-height:1.6;
}
.install-hint svg{width:20px;height:20px;color:var(--accent);flex-shrink:0;margin-top:1px}
.install-hint b{color:var(--accent)}
.install-hint .close-x{
  margin-left:auto;padding:0 6px;color:var(--text-3);cursor:pointer;font-size:1.2rem;
}

/* Settings rows */
.settings-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;margin-bottom:14px}
.set-row{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border);font-size:.9rem}
.set-row:last-child{border-bottom:none}
.set-row .lbl{font-weight:600}
.set-row .val{color:var(--text-3);font-size:.82rem}
.btn-ghost{background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:6px 12px;color:var(--text);font-size:.78rem;font-weight:700;cursor:pointer}
.btn-ghost:active{transform:scale(.95)}

/* responsive */
@media (min-width:520px){
  .app{padding:0 12px calc(80px + var(--safe-bottom))}
}

button,input{font-family:inherit}
a{color:var(--accent)}
.tile,.qcat,.lesson-card{text-align:left;color:inherit;font:inherit;width:100%}
button.tile,button.qcat{display:block}
.pattern-head{width:100%;background:none;border:none;color:inherit;font:inherit;text-align:left}
.pattern-body canvas,.pod canvas,.q-image canvas{display:block;width:100%;background:#02060b;border-radius:12px;border:1px solid rgba(0,212,255,.15)}
.pattern-body canvas{margin-bottom:12px}
.pattern-actions{display:flex;gap:8px;margin-top:12px}
.reader-body em{color:var(--text-2)}
.cmp-table-wrap{overflow-x:auto}
sup.ref{font-size:.68em;line-height:0;margin-left:1px}
sup.ref a{color:var(--accent);text-decoration:none;font-weight:700;padding:0 1px}
sup.ref a:hover{text-decoration:underline}
figure.trace{margin:18px 0;background:#02060b;border:1px solid rgba(0,212,255,.18);border-radius:var(--radius);overflow:hidden}
figure.trace canvas{display:block;width:100%;height:170px}
figure.trace figcaption{padding:10px 14px;font-size:.8rem;line-height:1.5;color:var(--text-2);border-top:1px solid var(--border)}
.trace-open{background:none;border:none;color:var(--accent);font-weight:700;font-size:.8rem;cursor:pointer;padding:0;white-space:nowrap}
.trace-open::after{content:' \2192'}
.seg{display:flex;gap:6px;margin:10px 0 0;flex-wrap:wrap}
.seg button{flex:1;padding:8px 10px;border-radius:10px;background:var(--surface-2);border:1px solid var(--border);color:var(--text-2);font-size:.78rem;font-weight:700;cursor:pointer;white-space:nowrap}
.seg button.active{background:var(--accent);color:#05080f;border-color:transparent}
.seg-label{font-size:.68rem;color:var(--text-3);font-weight:700;letter-spacing:.08em;text-transform:uppercase;margin-top:12px}
.knob input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:#fff;border:none}
.viewer-note{font-size:.74rem;color:var(--text-3);line-height:1.55;margin-top:10px}
.viewer-header .live{color:#ffc45e}
.src-list{list-style:none;counter-reset:s;display:flex;flex-direction:column;gap:8px;margin-bottom:14px}
.src-list li{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px 12px 44px;font-size:.82rem;line-height:1.55;color:var(--text-2);position:relative}
.src-list li::before{content:attr(data-n);position:absolute;left:14px;top:12px;font-family:var(--mono);font-size:.75rem;color:var(--accent);font-weight:700}
.src-list a{word-break:break-all}
.sheet{position:fixed;left:0;right:0;bottom:0;z-index:900;max-width:560px;margin:0 auto;background:var(--surface-2);border:1px solid var(--border-2);border-radius:20px 20px 0 0;padding:18px 20px calc(22px + var(--safe-bottom));transform:translateY(110%);transition:transform .3s cubic-bezier(.2,.8,.2,1);box-shadow:0 -20px 60px rgba(0,0,0,.6)}
.sheet.open{transform:none}
.sheet .lbl{font-size:.68rem;color:var(--accent);font-weight:800;letter-spacing:.1em;text-transform:uppercase;margin-bottom:6px}
.sheet p{font-size:.88rem;line-height:1.6;color:var(--text);margin-bottom:10px}
.sheet .row{display:flex;gap:10px;align-items:center}
.family{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}
.family a{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px;text-decoration:none;color:var(--text);display:block}
.family a b{display:block;font-size:.92rem}
.family a span{font-size:.74rem;color:var(--text-3);line-height:1.4;display:block;margin-top:2px}
.about{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:16px 18px;font-size:.84rem;line-height:1.65;color:var(--text-2);margin-bottom:14px}
.about b{color:var(--text)}
.gloss-ar{font-family:var(--mono);font-size:.72rem}
.q-foot{font-size:.74rem;color:var(--text-3);margin-top:10px}
.hero-sub b{color:var(--text)}
.stat-value{font-variant-numeric:tabular-nums}
@media (hover:hover){
  .tile:hover,.qcat:hover,.lesson-card:hover,.pattern-card:hover,.family a:hover{border-color:var(--border-2);background:var(--surface-2)}
  .tab:not(.active):hover,.chip:not(.active):hover,.pat-btn:not(.active):hover,.seg button:not(.active):hover{color:var(--text);border-color:var(--border-2)}
}
@media (min-width:900px){
  .app{max-width:1080px;padding:0 24px 40px}
  .bottom-nav{display:none}
  .tabs{padding:8px 18px 4px}
  .hero{padding:34px}
  .hero-title{font-size:2.5rem;max-width:18ch}
  .hero-sub{max-width:58ch;font-size:1rem}
  .quick-grid{grid-template-columns:repeat(4,1fr)}
  .quiz-cat{grid-template-columns:repeat(4,1fr)}
  #lessonsList,#patternsList,.gloss-list,.src-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:start}
  #lessonsList .lesson-card,#patternsList .pattern-card{margin-bottom:0}
  .reader-body{max-width:720px}
  .reader-body p,.reader-body li{font-size:1rem}
  figure.trace canvas{height:200px}
  #quizPlay{max-width:720px;margin:0 auto}
  .viewer-grid{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:14px;align-items:start}
  .viewer-left{display:block}
  .viewer-controls{position:sticky;top:76px}
  .knobs{grid-template-columns:1fr}
  .ctrl-row{flex-wrap:wrap;overflow:visible}
  .family{grid-template-columns:repeat(4,1fr)}
  .toast{bottom:40px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
[hidden]{display:none!important}
.viewer-grid{display:flex;flex-direction:column}
.viewer-left{display:contents}
.viewer-frame{order:1}.viewer-controls{order:2}.diagnosis-card{order:3}.viewer-note{order:4}
.toast{opacity:0;pointer-events:none}.toast.show{opacity:1}
.sheet{visibility:hidden}.sheet.open{visibility:visible}
@media (min-width:900px){.viewer-grid{display:grid}.viewer-left{display:block}}
.reader{visibility:hidden;transition:transform .35s cubic-bezier(.2,.8,.2,1),visibility 0s .35s}
.reader.open{visibility:visible;transition:transform .35s cubic-bezier(.2,.8,.2,1)}
.ring-info .trace-open{white-space:normal;text-align:left;line-height:1.35}
.ctrl-row{flex-wrap:wrap;overflow:visible}

/* ---- static pages and the crawlable home section ---- */
.learn{margin-top:26px}
.learn h2{font-family:var(--display);font-weight:600;font-size:1.5rem;line-height:1.2;margin:26px 0 10px}
.learn p{color:var(--text-2);font-size:.92rem;line-height:1.7;margin-bottom:10px;max-width:70ch}
.learn p b{color:var(--text)}
.linkgrid{display:grid;grid-template-columns:1fr;gap:8px;margin:12px 0 6px;list-style:none}
.linkgrid a{display:block;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:11px 14px;text-decoration:none;color:var(--text);font-weight:700;font-size:.88rem}
.linkgrid a span{display:block;color:var(--text-3);font-weight:500;font-size:.76rem;margin-top:2px}
.linkgrid.small{grid-template-columns:1fr 1fr}
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 14px;margin-bottom:8px}
.faq summary{cursor:pointer;font-weight:700;font-size:.92rem}
.faq details p{margin:8px 0 0}
.page{max-width:780px;margin:0 auto;padding:0 20px 80px}
.page .topbar{padding-left:0;padding-right:0}
.page .brand{text-decoration:none;color:inherit}
.crumbs{font-size:.78rem;color:var(--text-3);margin:6px 0 18px}
.crumbs a{color:var(--text-2);text-decoration:none}
.page h1{font-family:var(--display);font-weight:600;font-size:2.1rem;line-height:1.12;letter-spacing:-.01em;margin-bottom:8px}
.page .lede{color:var(--text-2);font-size:1.02rem;line-height:1.6;margin-bottom:18px}
.page .reader-body{max-width:none;padding:0}
.page figure.trace canvas{height:210px}
.page .cta{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0}
.page .cta a{text-decoration:none}
.page .cta .next-btn{width:auto;margin:0;padding:13px 20px;font-size:.95rem}
.page .cta .btn-ghost{padding:13px 18px;font-size:.9rem;display:inline-flex;align-items:center}
.page .src-list{display:flex!important;flex-direction:column}
.page .pager{display:flex;justify-content:space-between;gap:12px;margin-top:26px;font-size:.88rem}
.page .pager a{text-decoration:none;font-weight:700}
.page .foot{margin-top:34px;padding-top:18px;border-top:1px solid var(--border);font-size:.78rem;line-height:1.7;color:var(--text-3)}
.page .foot a{color:var(--text-2)}
.page h2.sec{font-size:1.1rem;font-weight:800;margin:30px 0 12px}
@media (min-width:700px){.linkgrid{grid-template-columns:1fr 1fr}.linkgrid.small{grid-template-columns:repeat(3,1fr)}.page h1{font-size:2.7rem}}
@media (min-width:900px){.linkgrid.small{grid-template-columns:repeat(4,1fr)}}