:root{
  --bg:#f5f6f9;
  --surface:#ffffff;
  --surface-2:#f0f2f7;
  --border:#e3e6ee;
  --border-strong:#d2d7e3;
  --text:#1f2533;
  --muted:#6b7280;
  --faint:#9aa1ae;
  --brand:#00C6B9;
  --brand-soft:#E1F5EE;
  --brand-ink:#0A6E63;
  --cta:#FF9000;
  --cta-hover:#E07E00;
  --alert:#FE4A55;
  --rail:#0B6F66;
  --success:#0f9d6f;
  --success-soft:#e6f6f0;
  --warning:#c4791a;
  --warning-soft:#fbf2e3;
  --danger:#d23f54;
  --danger-soft:#fbe9ec;
  --radius:12px;
  --radius-sm:8px;
  --shadow:0 1px 2px rgba(20,28,50,.05), 0 1px 3px rgba(20,28,50,.04);
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:var(--sans);background:var(--bg);color:var(--text);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0 0 .4em;font-weight:600;line-height:1.3}
h1{font-size:24px}
h2{font-size:19px}
h3{font-size:16px}
p{margin:0 0 .8em}
code{font-family:var(--mono);background:var(--surface-2);padding:1px 6px;border-radius:6px;font-size:.88em;color:var(--brand-ink)}

#app{display:flex;min-height:100vh}

/* Sidebar */
.sidebar{width:248px;flex:none;background:var(--rail);border-right:1px solid rgba(255,255,255,.1);display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.brand{display:flex;align-items:center;gap:12px;padding:20px 18px 16px}
.brand-mark{width:40px;height:40px;border-radius:11px;background:var(--cta);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;letter-spacing:.5px}
.brand-name{font-weight:600;font-size:15px;color:#fff}
.brand-sub{font-size:12px;color:rgba(255,255,255,.7)}
#nav{padding:8px 12px;display:flex;flex-direction:column;gap:2px;flex:1}
.nav-item{display:flex;align-items:center;gap:11px;padding:9px 12px;border-radius:var(--radius-sm);color:rgba(255,255,255,.82);font-size:14px;font-weight:500;cursor:pointer}
.nav-item:hover{background:rgba(255,255,255,.1);color:#fff}
.nav-item.active{background:rgba(255,255,255,.16);color:#fff;box-shadow:inset 3px 0 0 var(--cta)}
.nav-ico{font-size:15px;width:18px;text-align:center;opacity:.85}
.nav-badge{margin-left:auto;background:var(--alert);color:#fff;font-size:11px;font-weight:600;min-width:20px;height:20px;border-radius:10px;display:none;align-items:center;justify-content:center;padding:0 6px}
.nav-badge.show{display:inline-flex}
.sidebar-foot{padding:14px 16px;border-top:1px solid rgba(255,255,255,.18)}
.stage-tag{margin-top:10px;font-size:11px;color:rgba(255,255,255,.55);text-align:center}
.sidebar .btn-ghost{color:rgba(255,255,255,.85);border-color:rgba(255,255,255,.25)}
.sidebar .btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff}

/* Main */
.main{flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{height:60px;flex:none;display:flex;align-items:center;justify-content:space-between;padding:0 28px;border-bottom:1px solid var(--border);background:rgba(255,255,255,.7);backdrop-filter:blur(6px);position:sticky;top:0;z-index:5}
.crumb{font-weight:600;font-size:15px}
.topbar-right{display:flex;align-items:center;gap:14px}
.mastery-chip{display:flex;align-items:center;gap:8px;background:var(--surface-2);border:1px solid var(--border);padding:6px 12px;border-radius:20px}
.mastery-label{font-size:12px;color:var(--muted)}
.mastery-val{font-weight:700;color:var(--brand-ink)}
.view{padding:28px;max-width:980px;width:100%;margin:0 auto}

/* Cards & layout */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.card-pad{padding:20px 22px}
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
.row{display:flex;gap:12px}
.between{display:flex;align-items:center;justify-content:space-between;gap:12px}
.muted{color:var(--muted)}
.faint{color:var(--faint)}
.small{font-size:13px}
.center{text-align:center}
.mt0{margin-top:0}.mb0{margin-bottom:0}
.stack>*+*{margin-top:14px}

/* Hero */
.hero{background:linear-gradient(120deg,#00C6B9,#FF9000);color:#fff;border-radius:var(--radius);padding:26px 28px;margin-bottom:22px}
.hero h1{color:#fff}
.hero p{color:rgba(255,255,255,.9);margin-bottom:0;max-width:62ch}

/* Buttons */
.btn{font-family:inherit;font-size:14px;font-weight:600;padding:9px 16px;border-radius:var(--radius-sm);border:1px solid var(--border-strong);background:var(--surface);color:var(--text);cursor:pointer;transition:background .12s,border-color .12s}
.btn:hover{background:var(--surface-2)}
.btn:active{transform:translateY(.5px)}
.btn-primary{background:var(--cta);border-color:var(--cta);color:#fff}
.btn-primary:hover{background:var(--cta-hover)}
.btn-ghost{background:transparent;border-color:transparent;color:var(--muted)}
.btn-ghost:hover{background:var(--surface-2);color:var(--text)}
.btn-block{width:100%}
.btn-sm{padding:6px 11px;font-size:13px}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* Metric */
.metric{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px}
.metric .label{font-size:13px;color:var(--muted)}
.metric .num{font-size:26px;font-weight:700;margin-top:4px}

/* Progress bar */
.bar{height:8px;background:var(--surface-2);border-radius:5px;overflow:hidden}
.bar>span{display:block;height:100%;background:var(--brand);border-radius:5px;transition:width .4s}
.bar.s>span{background:var(--success)}
.bar.w>span{background:var(--warning)}
.bar.d>span{background:var(--danger)}

/* Module list */
.mod{display:flex;gap:16px;align-items:flex-start;padding:18px 20px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);cursor:pointer;transition:border-color .12s,box-shadow .12s}
.mod:hover{border-color:var(--border-strong);box-shadow:var(--shadow)}
.mod-num{width:38px;height:38px;flex:none;border-radius:10px;background:var(--brand-soft);color:var(--brand-ink);display:flex;align-items:center;justify-content:center;font-weight:700}
.mod-num.done{background:var(--success-soft);color:var(--success)}
.mod-body{flex:1;min-width:0}
.mod-title{font-weight:600}
.mod-meta{font-size:13px;color:var(--muted);margin-top:2px}
.mod-right{font-size:13px;color:var(--muted);white-space:nowrap;align-self:center}
.pill{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;padding:3px 10px;border-radius:20px}
.pill-done{background:var(--success-soft);color:var(--success)}
.pill-prog{background:var(--brand-soft);color:var(--brand-ink)}
.pill-new{background:var(--surface-2);color:var(--muted)}

/* Lesson */
.lesson{max-width:760px}
.lesson h1{margin-bottom:6px}
.lesson .eyebrow{font-size:12px;font-weight:700;letter-spacing:.6px;text-transform:uppercase;color:var(--brand-ink)}
.lesson-content{font-size:15.5px;line-height:1.75}
.lesson-content h2{margin-top:1.6em}
.lesson-content h3{margin-top:1.3em}
.lesson-content ul,.lesson-content ol{padding-left:22px;margin:0 0 1em}
.lesson-content li{margin-bottom:.4em}
.lesson-content table{width:100%;border-collapse:collapse;margin:1em 0;font-size:14px}
.lesson-content th,.lesson-content td{border:1px solid var(--border);padding:8px 11px;text-align:left;vertical-align:top}
.lesson-content th{background:var(--surface-2);font-weight:600}
.callout{border:1px solid var(--border);border-left:4px solid var(--brand);background:var(--surface);border-radius:var(--radius-sm);padding:14px 16px;margin:1.2em 0}
.callout.k{border-left-color:var(--warning);background:var(--warning-soft)}
.callout.tip{border-left-color:var(--success);background:var(--success-soft)}
.callout .ct{font-weight:700;font-size:13px;text-transform:uppercase;letter-spacing:.4px;margin-bottom:4px}
.lesson-nav{display:flex;justify-content:space-between;gap:12px;margin-top:28px;padding-top:20px;border-top:1px solid var(--border)}
.lesson-toc{margin-bottom:18px}
.toc-item{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:var(--radius-sm);cursor:pointer;font-size:14px}
.toc-item:hover{background:var(--surface-2)}
.toc-item.active{background:var(--brand-soft);color:var(--brand-ink);font-weight:600}
.toc-check{width:18px;height:18px;border-radius:50%;border:1.5px solid var(--border-strong);flex:none;display:flex;align-items:center;justify-content:center;font-size:11px;color:#fff}
.toc-check.done{background:var(--success);border-color:var(--success)}

/* Flashcards */
.fc-wrap{max-width:620px;margin:0 auto}
.flashcard{min-height:280px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:34px;cursor:pointer;position:relative}
.fc-side-label{position:absolute;top:14px;left:18px;font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:var(--faint)}
.fc-q{font-size:21px;font-weight:600;line-height:1.4}
.fc-a{font-size:16px;line-height:1.6}
.fc-hint{position:absolute;bottom:14px;font-size:12px;color:var(--faint)}
.fc-rate{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:16px}
.fc-rate button{padding:12px 8px;border-radius:var(--radius-sm);border:1px solid var(--border-strong);background:var(--surface);cursor:pointer;font-weight:600;font-size:13px}
.fc-rate button small{display:block;font-weight:400;color:var(--faint);font-size:11px;margin-top:2px}
.fc-rate button:hover{background:var(--surface-2)}
.fc-tag{display:inline-block;font-family:var(--mono);font-size:13px;background:var(--surface-2);color:var(--brand-ink);padding:2px 8px;border-radius:6px;margin-bottom:10px}

/* Quiz */
.quiz-wrap{max-width:680px;margin:0 auto}
.opt{display:block;width:100%;text-align:left;padding:14px 16px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface);cursor:pointer;margin-bottom:10px;font-size:14.5px;transition:border-color .1s,background .1s}
.opt:hover{border-color:var(--brand);background:var(--brand-soft)}
.opt.correct{border-color:var(--success);background:var(--success-soft)}
.opt.wrong{border-color:var(--danger);background:var(--danger-soft)}
.opt:disabled{cursor:default}
.opt .key{font-weight:700;margin-right:8px;color:var(--muted)}
.explain{border-radius:var(--radius-sm);padding:14px 16px;margin-top:6px;font-size:14px}
.explain.ok{background:var(--success-soft);border:1px solid #bfe6d6}
.explain.no{background:var(--danger-soft);border:1px solid #f1cdd4}

/* Simulator */
.sim-grid{display:grid;grid-template-columns:1fr 320px;gap:18px;align-items:start}
.chat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);display:flex;flex-direction:column;height:560px;overflow:hidden}
.chat-head{padding:13px 18px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:11px;background:var(--surface-2)}
.chat-av{width:36px;height:36px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px}
.chat-name{font-weight:600;font-size:14px}
.chat-status{font-size:12px;color:var(--success)}
.chat-log{flex:1;overflow-y:auto;padding:18px;background:#eceff4;display:flex;flex-direction:column;gap:8px}
.msg{max-width:78%;padding:9px 13px;border-radius:14px;font-size:14px;line-height:1.5;white-space:pre-wrap;word-wrap:break-word}
.msg.them{background:#fff;align-self:flex-start;border-bottom-left-radius:4px}
.msg.me{background:#dcf3ea;align-self:flex-end;border-bottom-right-radius:4px}
.msg.sys{align-self:center;background:transparent;color:var(--muted);font-size:12px;max-width:90%;text-align:center}
.chat-input{display:flex;gap:8px;padding:12px;border-top:1px solid var(--border);background:var(--surface)}
.chat-input textarea{flex:1;resize:none;border:1px solid var(--border-strong);border-radius:20px;padding:10px 15px;font-family:inherit;font-size:14px;max-height:120px}
.chat-input textarea:focus{outline:none;border-color:var(--brand)}
.coach{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px}
.coach h3{font-size:14px;margin-bottom:12px}
.coach-item{display:flex;gap:9px;font-size:13.5px;margin-bottom:9px;line-height:1.45}
.coach-mark{flex:none;font-weight:700}
.coach-mark.ok{color:var(--success)}
.coach-mark.no{color:var(--danger)}
.coach-score{font-weight:700;font-size:15px;margin:6px 0 10px}
.scn-card{border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;cursor:pointer;background:var(--surface);transition:border-color .12s,box-shadow .12s}
.scn-card:hover{border-color:var(--brand);box-shadow:var(--shadow)}
.scn-type{font-size:11px;font-weight:700;letter-spacing:.4px;text-transform:uppercase;padding:2px 8px;border-radius:12px}
.scn-type.live{background:var(--brand-soft);color:var(--brand-ink)}
.scn-type.scripted{background:var(--surface-2);color:var(--muted)}
.typing{display:inline-flex;gap:3px;padding:11px 14px}
.typing span{width:6px;height:6px;border-radius:50%;background:var(--faint);animation:bl 1s infinite}
.typing span:nth-child(2){animation-delay:.2s}
.typing span:nth-child(3){animation-delay:.4s}
@keyframes bl{0%,80%,100%{opacity:.3}40%{opacity:1}}

/* Glossary */
.gloss-item{padding:14px 0;border-bottom:1px solid var(--border)}
.gloss-term{font-weight:600}
.gloss-def{color:var(--muted);font-size:14px;margin-top:2px}
.search{width:100%;padding:11px 14px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);font-family:inherit;font-size:14px;margin-bottom:16px}
.search:focus{outline:none;border-color:var(--brand)}

/* Modal */
.modal-backdrop{position:fixed;inset:0;background:rgba(20,26,45,.45);display:flex;align-items:center;justify-content:center;z-index:50;padding:20px}
.modal-backdrop[hidden]{display:none}
.modal{background:var(--surface);border-radius:var(--radius);width:100%;max-width:460px;box-shadow:0 12px 40px rgba(20,28,50,.25)}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}
.modal-head h2{margin:0;font-size:17px}
.modal-body{padding:20px}
.field{margin-bottom:16px}
.field label{display:block;font-weight:600;font-size:13px;margin-bottom:5px}
.field input,.field select{width:100%;padding:9px 12px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);font-family:inherit;font-size:14px}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px}
.dot.on{background:var(--success)}
.dot.off{background:var(--faint)}

/* 5-day plan */
.day-block{margin-bottom:14px}
.day-head{display:flex;align-items:center;gap:12px;margin:22px 0 10px}
.day-badge{width:34px;height:34px;flex:none;border-radius:9px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px}
.day-badge.done{background:var(--success)}
.day-title{font-weight:600;font-size:16px}
.day-sub{font-size:12px;color:var(--muted)}
.day-bar{flex:1;max-width:160px;margin-left:auto}

/* Shortcuts / @templates */
.tpl-toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:14px}
.cat-row{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:16px}
.cat-chip{font-size:12px;font-weight:600;padding:5px 12px;border-radius:16px;border:1px solid var(--border-strong);background:var(--surface);cursor:pointer;color:var(--muted)}
.cat-chip:hover{background:var(--surface-2)}
.cat-chip.active{background:var(--brand-soft);border-color:var(--brand);color:var(--brand-ink)}
.tpl-list{display:grid;gap:12px}
.tpl-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:14px 16px}
.tpl-top{display:flex;align-items:center;gap:10px;margin-bottom:7px;flex-wrap:wrap}
.tpl-code{font-family:var(--mono);font-size:15px;font-weight:600;color:var(--brand-ink);background:var(--brand-soft);padding:2px 9px;border-radius:6px}
.tpl-cat{font-size:11px;font-weight:600;color:var(--muted);background:var(--surface-2);padding:3px 9px;border-radius:12px}
.tpl-when{font-size:14px;margin:0 0 6px}
.tpl-meta{font-size:13px;color:var(--muted);margin:3px 0 0}
.tpl-meta b{color:var(--text);font-weight:600}
.tpl-reveal{filter:blur(5px);transition:filter .15s;cursor:pointer;user-select:none}
.tpl-reveal.shown{filter:none;cursor:auto}

/* Typing dojo */
.ty-wrap{max-width:680px;margin:0 auto}
.ty-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.ty-kindrow{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.ty-kind{font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;padding:3px 10px;border-radius:12px}
.ty-kind.template{background:var(--brand-soft);color:var(--brand-ink)}
.ty-kind.phrase{background:var(--success-soft);color:var(--success)}
.ty-kind.number{background:var(--warning-soft);color:var(--warning)}
.ty-prompt{font-size:18px;font-weight:600;line-height:1.5;margin:0 0 4px}
.ty-context{font-size:13px;color:var(--muted);margin:0 0 16px}
.ty-input{width:100%;padding:13px 15px;border:1.5px solid var(--border-strong);border-radius:var(--radius-sm);font-family:var(--mono);font-size:16px}
.ty-input:focus{outline:none;border-color:var(--brand)}
.ty-input.ok{border-color:var(--success);background:var(--success-soft)}
.ty-input.no{border-color:var(--danger);background:var(--danger-soft)}
.ty-actions{display:flex;gap:8px;margin-top:12px;align-items:center}
.ty-fb{margin-top:14px;border-radius:var(--radius-sm);padding:13px 15px;font-size:14px}
.ty-fb.ok{background:var(--success-soft);border:1px solid #bfe6d6}
.ty-fb.no{background:var(--danger-soft);border:1px solid #f1cdd4}
.ty-model{font-family:var(--mono);font-weight:600;color:var(--text)}
.ty-stats{display:flex;gap:18px;justify-content:center;margin-bottom:16px;font-size:13px;color:var(--muted)}
.ty-stats b{color:var(--text)}
.ty-filter{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:16px}

@media (max-width:900px){
  .sim-grid{grid-template-columns:1fr}
  .grid-2,.grid-3{grid-template-columns:1fr}
}

/* ---- Auth (login / setup) split-screen ---- */
#app:has(.auth-split){display:block}
.auth-split{display:grid;grid-template-columns:1.05fr .95fr;min-height:100vh;width:100%;flex:1 1 100%}
.auth-aside{background:linear-gradient(155deg,#00C6B9 0%,#0bb6ab 44%,#FF9000 140%);color:#fff;padding:42px 50px;display:flex;flex-direction:column}
.auth-brand{display:flex;align-items:center;gap:11px;font-size:16px;font-weight:600}
.auth-logo{width:40px;height:40px;border-radius:11px;background:rgba(255,255,255,.18);display:inline-flex;align-items:center;justify-content:center;font-weight:700;letter-spacing:.5px}
.auth-aside-mid{flex:1;display:flex;flex-direction:column;justify-content:center;max-width:500px}
.auth-headline{font-size:38px;font-weight:600;line-height:1.15;margin:0 0 16px;color:#fff}
.auth-lead{font-size:16px;line-height:1.65;margin:0;opacity:.95;color:#fff}
.auth-foot{font-size:12.5px;opacity:.85}
.auth-main{display:flex;align-items:center;justify-content:center;padding:40px;background:var(--bg)}
.auth-card{width:100%;max-width:360px}
.auth-card-logo{width:54px;height:54px;border-radius:14px;background:var(--cta);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;letter-spacing:.5px;font-size:18px;margin-bottom:18px}
.auth-title{font-size:25px;font-weight:600;margin:0 0 4px;color:var(--text)}
.auth-sub{font-size:14px;color:var(--muted);margin:0 0 22px}
.auth-card label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px;font-weight:500}
.auth-field{position:relative;margin-bottom:15px}
.auth-ic{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--faint);font-size:15px;pointer-events:none}
.auth-field input{width:100%;padding:12px 13px 12px 36px;border:1px solid var(--border-strong);border-radius:10px;font-size:14px;font-family:inherit;color:var(--text);background:var(--surface)}
.auth-field input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.auth-btn{width:100%;margin-top:6px;padding:12px;background:var(--brand);color:#fff;border:none;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;font-family:inherit}
.auth-btn:hover{background:#04b3a7}
.auth-btn:disabled{opacity:.6;cursor:default}
.auth-msg{font-size:13px;border-radius:9px;padding:10px 12px;margin-bottom:14px}
.auth-msg.err{background:var(--danger-soft);color:var(--danger)}
@media (max-width:860px){
  .auth-split{grid-template-columns:1fr}
  .auth-aside{padding:30px 28px}
  .auth-aside-mid{justify-content:flex-start;margin-top:14px;max-width:none}
  .auth-headline{font-size:27px}
  .auth-main{padding:30px 22px}
}

/* ---- Visual (WYSIWYG) content editor ---- */
.rte{border:1px solid var(--border-strong);border-radius:var(--radius-sm);overflow:hidden;background:var(--surface)}
.rte-toolbar{display:flex;flex-wrap:wrap;gap:4px;align-items:center;padding:8px;border-bottom:1px solid var(--border);background:var(--surface-2);position:sticky;top:0;z-index:2}
.rte-tool{appearance:none;border:1px solid var(--border-strong);background:var(--surface);color:var(--text);border-radius:7px;padding:5px 9px;font-size:13px;font-family:inherit;cursor:pointer;line-height:1.2;min-width:30px}
.rte-tool:hover{background:var(--brand-soft);border-color:var(--brand)}
.rte-tool:active{transform:translateY(1px)}
.rte-tool.is-active{background:var(--brand-soft);border-color:var(--brand);color:var(--brand-ink)}
select.rte-block{padding:5px 8px;font-size:13px}
.rte-sep{width:1px;align-self:stretch;background:var(--border);margin:2px 4px}
.rte-surface{min-height:360px;max-height:62vh;overflow:auto;padding:18px 22px;outline:none}
.rte-surface:focus{box-shadow:inset 0 0 0 2px var(--brand-soft)}
.lesson-content img,.rte-surface img{max-width:100%;height:auto;border-radius:8px}
.lesson-content hr{border:none;border-top:1px solid var(--border);margin:1.4em 0}
.rte-surface hr{border:none;border-top:2px dashed var(--brand);margin:20px 0}
/* rich constructs (render the same in the reader + the editor surface) */
.lesson-content h4{margin-top:1.2em;font-size:14.5px}
.lesson-content blockquote{margin:1.2em 0;padding:8px 16px;border-left:4px solid var(--brand);background:var(--surface-2);border-radius:0 var(--radius-sm) var(--radius-sm) 0}
.lesson-content blockquote p:last-child{margin-bottom:0}
.lesson-content mark{background:var(--warning-soft);padding:0 3px;border-radius:3px;color:inherit}
.lesson-content code{font-family:var(--mono);background:var(--surface-2);padding:1px 6px;border-radius:6px;font-size:.88em;color:var(--brand-ink)}
.lesson-content pre{background:var(--surface-2);padding:12px 14px;border-radius:var(--radius-sm);overflow:auto;font-family:var(--mono);font-size:13px;margin:1em 0}
.lesson-content pre code{background:none;padding:0}
.lesson-content figure{margin:1.2em 0;text-align:center}
.lesson-content figcaption{font-size:13px;color:var(--muted);margin-top:6px}
.callout.w{border-left-color:var(--alert);background:var(--danger-soft)}
/* colour-swatch popover */
.rte-pop{position:absolute;z-index:30;background:var(--surface);border:1px solid var(--border-strong);border-radius:8px;box-shadow:0 8px 24px rgba(20,28,50,.16);padding:8px;display:flex;flex-wrap:wrap;gap:6px;max-width:188px}
.rte-swatch{width:22px;height:22px;border-radius:5px;border:1px solid rgba(0,0,0,.15);cursor:pointer;padding:0}
.rte-swatch:hover{transform:scale(1.12)}
.rte-swatch.rte-clear{width:100%;height:auto;padding:4px 8px;font-size:12px;background:var(--surface);border:1px solid var(--border-strong);border-radius:5px;color:var(--muted);cursor:pointer;text-align:left}
/* dropdown menu popover (table tools) + size select */
.rte-pop.rte-menu{flex-direction:column;flex-wrap:nowrap;gap:2px;max-width:210px;padding:6px}
.rte-menu-item{display:block;width:100%;text-align:left;padding:6px 10px;font-size:13px;background:var(--surface);border:none;border-radius:5px;color:var(--text);cursor:pointer;font-family:inherit}
.rte-menu-item:hover{background:var(--brand-soft);color:var(--brand-ink)}
select.rte-size{padding:5px 6px;font-size:13px}