*{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#f1f5f9;--side:#ffffff;--card:#ffffff;--bd:#e2e8f0;
  --code:#1e1f29;--acc:#e76f00;--acc2:#2563eb;--accbg:rgba(231,111,0,.10);
  --ok:#16a34a;--okbg:#f0fdf4;--err:#dc2626;--errbg:#fef2f2;--warn:#d97706;--warnbg:#fffbeb;--info:#2563eb;--infobg:#eff6ff;
  --tx:#0f172a;--tx2:#475569;--tx3:#94a3b8;
  --kw:#ff79c6;--str:#f1fa8c;--num:#bd93f9;--cmt:#7d8bb5;--tp:#8be9fd;--an:#50fa7b;
}
html,body{height:100%}
body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--tx);overflow:hidden}
#app{display:flex;height:100vh}
code{font-family:'Cascadia Code','Consolas',ui-monospace,monospace;font-size:.92em;background:#eef2f7;border:1px solid var(--bd);border-radius:4px;padding:0 4px;color:#9a3412}
pre{font-family:'Cascadia Code','Consolas',ui-monospace,monospace}

/* ── SIDEBAR ── */
#sidebar{width:280px;min-width:280px;background:var(--side);border-right:1px solid var(--bd);display:flex;flex-direction:column;overflow-y:auto;box-shadow:2px 0 8px rgba(0,0,0,.05);z-index:20}
.sidebar-header{padding:18px 16px;border-bottom:1px solid var(--bd)}
.logo{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.logo-icon{font-size:28px}
.logo-title{font-size:17px;font-weight:700;color:var(--acc)}
.logo-sub{font-size:11px;color:var(--tx3)}
.score-widget{background:var(--bg);border-radius:10px;padding:12px;border:1px solid var(--bd)}
.score-lbl{font-size:10px;text-transform:uppercase;letter-spacing:1px;color:var(--tx3);display:block;margin-bottom:4px}
.score-nums{font-size:19px;font-weight:700;color:var(--acc);display:block;margin-bottom:8px}
.score-sub{display:block;font-size:11px;color:var(--tx2);margin-top:6px}
#block-nav{padding:10px;flex:1}
.nav-btn{width:100%;padding:10px 12px;background:transparent;border:none;color:var(--tx2);text-align:left;cursor:pointer;border-radius:10px;display:flex;align-items:center;gap:10px;transition:all .15s;font-size:13px;margin-bottom:3px;font-family:inherit}
.nav-btn:hover{background:var(--accbg);color:var(--tx)}
.nav-btn.active{background:rgba(231,111,0,.14);color:var(--acc);font-weight:600}
.nav-ic{font-size:17px;width:22px;text-align:center}
.nav-tag{font-size:10px;font-weight:700;background:var(--bg);border:1px solid var(--bd);border-radius:5px;padding:2px 6px;min-width:44px;text-align:center;color:var(--tx3)}
.nav-btn.active .nav-tag{background:var(--acc);color:#fff;border-color:var(--acc)}
.nav-title{flex:1;font-size:12.5px;line-height:1.3}
.nav-pts{font-size:11px;font-weight:600;color:var(--tx3)}
.nav-sep{font-size:10px;text-transform:uppercase;letter-spacing:1px;color:var(--tx3);padding:12px 12px 6px}
.sidebar-foot{font-size:11px;color:var(--tx3);padding:12px 16px;border-top:1px solid var(--bd);line-height:1.5}

/* ── MAIN ── */
#main{flex:1;display:flex;flex-direction:column;overflow:hidden;min-width:0}
#block-header{padding:18px 30px 14px;border-bottom:1px solid var(--bd);background:#fff;display:flex;gap:14px;align-items:flex-start}
#block-header>div{flex:1;min-width:0}
.tag{display:inline-block;background:var(--acc);color:#fff;font-size:10px;font-weight:700;padding:3px 10px;border-radius:20px;margin-bottom:6px;letter-spacing:1px}
#header-title{font-size:21px;font-weight:700;margin-bottom:4px}
#header-desc{font-size:13px;color:var(--tx2);margin-bottom:10px}
.bar-bg{background:var(--bd);border-radius:4px;height:6px;overflow:hidden}
.bar-bg.thin{height:4px;max-width:420px}
.bar-fill{height:100%;background:var(--acc);border-radius:4px;transition:width .4s ease;width:0%}
.bar-fill.accent2{background:linear-gradient(90deg,var(--acc),var(--warn))}
#tabs-bar{display:flex;gap:4px;padding:9px 30px;border-bottom:1px solid var(--bd);background:var(--side);overflow-x:auto}
#tabs-bar:empty{display:none}
.tab-btn{padding:7px 15px;border:none;background:transparent;color:var(--tx2);border-radius:8px;cursor:pointer;font-size:12.5px;font-weight:500;white-space:nowrap;font-family:inherit}
.tab-btn:hover{background:var(--accbg);color:var(--tx)}
.tab-btn.active{background:var(--acc);color:#fff;font-weight:600}
#content-area{flex:1;overflow-y:auto;padding:24px 30px 60px}
.icon-btn{background:none;border:1px solid var(--bd);border-radius:8px;width:36px;height:36px;font-size:18px;cursor:pointer;color:var(--tx2);flex:none}
.only-mobile{display:none}

/* ── CARDS / LISTAS ── */
.card{background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:20px 22px;margin-bottom:16px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.card h3{font-size:16px;color:var(--acc);margin-bottom:10px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.card h4{font-size:14px;margin:14px 0 8px;color:var(--tx)}
.card p,.card li{font-size:13.5px;line-height:1.7;color:var(--tx2);margin-bottom:6px}
.card ul,.card ol{margin:6px 0 8px 20px}
.card .nota,.nota{font-size:12.5px;background:var(--infobg);border-left:3px solid var(--info);padding:8px 12px;border-radius:6px;color:#1e3a8a}
.card table{width:100%;border-collapse:collapse;margin:10px 0;font-size:12.5px}
.card th{background:var(--bg);color:var(--acc);padding:7px 10px;text-align:left;border:1px solid var(--bd)}
.card td{padding:7px 10px;border:1px solid var(--bd);color:var(--tx2);vertical-align:top}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px}
.item{background:#fff;border:1px solid var(--bd);border-radius:12px;padding:14px 16px;cursor:pointer;transition:all .15s;display:flex;flex-direction:column;gap:6px;text-align:left;font-family:inherit;color:inherit}
.item:hover{border-color:var(--acc);box-shadow:0 4px 14px rgba(231,111,0,.12);transform:translateY(-1px)}
.item .it-top{display:flex;align-items:center;gap:8px}
.item .it-num{font-weight:700;font-size:12px;background:var(--bg);border:1px solid var(--bd);border-radius:6px;padding:2px 8px;color:var(--tx2)}
.item .it-title{font-size:13.5px;font-weight:600;color:var(--tx);line-height:1.35}
.item .it-meta{font-size:11.5px;color:var(--tx3);display:flex;gap:10px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:4px;font-size:11px;font-weight:600;border-radius:20px;padding:2px 9px;background:var(--bg);color:var(--tx2);border:1px solid var(--bd)}
.chip.top{background:var(--okbg);color:var(--ok);border-color:#bbf7d0}
.chip.ok{background:#ecfdf5;color:#047857;border-color:#a7f3d0}
.chip.mid{background:var(--warnbg);color:var(--warn);border-color:#fde68a}
.chip.ko{background:var(--errbg);color:var(--err);border-color:#fecaca}
.chip.na{background:#f8fafc;color:var(--tx3)}
.item .chip{margin-left:auto}

/* ── EJERCICIO ── */
.back{background:none;border:none;color:var(--acc2);cursor:pointer;font-size:13px;margin-bottom:12px;font-family:inherit;padding:0}
.ex-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:16px}
.ex-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:6px}
.ex-head h2{font-size:19px}
.toolbar{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.btn{border:1px solid var(--bd);background:#fff;color:var(--tx);border-radius:9px;padding:8px 14px;font-size:13px;cursor:pointer;font-family:inherit;font-weight:500;display:inline-flex;align-items:center;gap:6px}
.btn:hover{border-color:var(--acc);color:var(--acc)}
.btn.primary{background:var(--acc);border-color:var(--acc);color:#fff;font-weight:600}
.btn.primary:hover{filter:brightness(1.07);color:#fff}
.btn.blue{background:var(--acc2);border-color:var(--acc2);color:#fff}
.btn:disabled{opacity:.45;cursor:not-allowed}
.editor-wrap{border:1px solid #2b2d3a;border-radius:12px;overflow:hidden;background:var(--code)}
.editor-bar{display:flex;align-items:center;justify-content:space-between;padding:6px 12px;background:#14151d;color:#8a90b4;font-size:11.5px}
.CodeMirror{height:460px;font-family:'Cascadia Code','Consolas',ui-monospace,monospace;font-size:13.5px;line-height:1.5}
textarea.fallback{width:100%;height:460px;background:var(--code);color:#f8f8f2;border:none;padding:12px;font-family:'Consolas',monospace;font-size:13.5px;resize:vertical;tab-size:4}
.codeblock{background:var(--code);color:#f8f8f2;border-radius:10px;padding:14px 16px;overflow-x:auto;font-size:12.8px;line-height:1.55;margin:8px 0;white-space:pre}
.codeblock .k{color:var(--kw)}.codeblock .s{color:var(--str)}.codeblock .n{color:var(--num)}.codeblock .c{color:var(--cmt);font-style:italic}.codeblock .t{color:var(--tp)}.codeblock .a{color:var(--an)}
.salida{background:#0b0c10;color:#c8f7c5;border-radius:10px;padding:12px 14px;font-size:12.5px;white-space:pre-wrap;font-family:'Consolas',monospace;max-height:260px;overflow:auto}
.card pre:not(.codeblock){background:#0f172a;color:#e2e8f0;border-radius:8px;padding:10px 12px;font-size:12.5px;overflow-x:auto;margin:6px 0;white-space:pre}

/* ── PREGUNTAS ── */
.q{border:1px solid var(--bd);border-radius:12px;padding:14px 16px;margin-bottom:12px;background:#fff}
.q .q-t{font-size:13.5px;font-weight:600;margin-bottom:10px;line-height:1.5}
.q .opts{display:flex;flex-direction:column;gap:6px}
.opt{border:1px solid var(--bd);background:#fff;border-radius:9px;padding:9px 12px;text-align:left;font-size:13px;cursor:pointer;font-family:inherit;color:var(--tx);line-height:1.45}
.opt:hover:not(:disabled){border-color:var(--acc2);background:var(--infobg)}
.opt.right{border-color:var(--ok);background:var(--okbg);color:#14532d}
.opt.wrong{border-color:var(--err);background:var(--errbg);color:#7f1d1d}
.opt:disabled{cursor:default}
.q .exp{margin-top:10px;font-size:13px;line-height:1.6;color:var(--tx2);background:var(--bg);border-radius:8px;padding:10px 12px}

/* ── FEEDBACK ── */
.fb{border-radius:14px;border:1px solid var(--bd);background:#fff;overflow:hidden;margin-bottom:16px}
.fb-head{display:flex;align-items:center;gap:16px;padding:16px 20px;flex-wrap:wrap}
.nota-big{font-size:38px;font-weight:800;line-height:1;min-width:84px;text-align:center}
.nota-big small{font-size:14px;font-weight:600;color:var(--tx3)}
.fb-head.top{background:var(--okbg)}.fb-head.top .nota-big{color:var(--ok)}
.fb-head.ok{background:#ecfdf5}.fb-head.ok .nota-big{color:#047857}
.fb-head.mid{background:var(--warnbg)}.fb-head.mid .nota-big{color:var(--warn)}
.fb-head.ko{background:var(--errbg)}.fb-head.ko .nota-big{color:var(--err)}
.fb-head .lvl{font-weight:700;font-size:14px}
.fb-head .det{font-size:12px;color:var(--tx2);margin-top:3px}
.fb-sec{padding:12px 20px;border-top:1px solid var(--bd)}
.fb-sec h4{font-size:13px;margin-bottom:8px;display:flex;align-items:center;gap:6px}
.fb-li{display:flex;gap:10px;font-size:13px;line-height:1.55;padding:6px 0;border-bottom:1px dashed #eef2f7}
.fb-li:last-child{border-bottom:none}
.fb-li .ic{flex:none;width:20px;text-align:center}
.fb-li b{color:var(--tx)}
.fb-li .why{color:var(--tx2)}
.fb-sec.no h4{color:var(--err)}.fb-sec.si h4{color:var(--ok)}.fb-sec.err h4{color:var(--err)}.fb-sec.avi h4{color:var(--warn)}.fb-sec.con h4{color:var(--info)}
details.fold summary{cursor:pointer;font-size:13px;font-weight:600;color:var(--tx2);padding:4px 0}
.hint{background:var(--warnbg);border:1px solid #fde68a;border-radius:10px;padding:10px 14px;font-size:13px;line-height:1.6;margin-bottom:8px;color:#78350f}
.hint b{color:#92400e}
.hint pre{margin-top:6px}

/* ── INICIO / RECOMENDACIONES ── */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:16px}
.kpi{background:#fff;border:1px solid var(--bd);border-radius:12px;padding:14px 16px}
.kpi .v{font-size:24px;font-weight:800;color:var(--acc)}
.kpi .l{font-size:11.5px;color:var(--tx2);margin-top:2px}
.tagrow{display:flex;align-items:center;gap:10px;margin:8px 0;font-size:13px}
.tagrow .tn{width:230px;flex:none;color:var(--tx)}
.tagrow .bar-bg{flex:1;height:8px}
.tagrow .pc{width:44px;text-align:right;font-weight:700;font-size:12px;color:var(--tx2)}
.bar-fill.good{background:var(--ok)}.bar-fill.bad{background:var(--err)}.bar-fill.meh{background:var(--warn)}
.reco{display:flex;gap:12px;align-items:flex-start;padding:10px 0;border-bottom:1px dashed var(--bd)}
.reco:last-child{border-bottom:none}
.reco .rt{flex:1;font-size:13px;line-height:1.55;color:var(--tx2)}
.reco .rt b{color:var(--tx)}

/* ── EXAMEN ── */
.exam-bar{position:sticky;top:-24px;z-index:5;background:#0f172a;color:#fff;border-radius:12px;padding:10px 16px;display:flex;align-items:center;gap:14px;margin-bottom:14px;flex-wrap:wrap}
.timer{font-size:22px;font-weight:800;font-variant-numeric:tabular-nums}
.timer.low{color:#fca5a5}
.exam-tabs{display:flex;gap:6px;flex-wrap:wrap}
.exam-tabs .tab-btn{color:#cbd5e1}
.exam-tabs .tab-btn.active{background:var(--acc);color:#fff}
.form-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:8px 0;font-size:13px}
.form-row label{min-width:140px;color:var(--tx2)}
select,input[type=number]{font-family:inherit;font-size:13px;padding:7px 10px;border:1px solid var(--bd);border-radius:8px;background:#fff}
.hist td,.hist th{font-size:12.5px}

/* ── CHULETA ── */
.cs-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(420px,1fr));gap:14px}
.cs-grid .card{margin:0}

#toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(120px);background:#0f172a;color:#fff;padding:10px 18px;border-radius:10px;font-size:13px;transition:transform .25s;z-index:100;max-width:90vw}
#toast.show{transform:translateX(-50%) translateY(0)}

@media (max-width:900px){
  #sidebar{position:fixed;left:0;top:0;bottom:0;transform:translateX(-100%);transition:transform .2s}
  #sidebar.open{transform:none}
  .only-mobile{display:inline-block}
  .logo .only-mobile{margin-left:auto}
  #block-header{padding:14px 16px 12px}
  #tabs-bar{padding:8px 16px}
  #content-area{padding:16px 16px 60px}
  .cs-grid{grid-template-columns:1fr}
  .tagrow .tn{width:130px}
  .CodeMirror,textarea.fallback{height:380px}
  .exam-bar{top:-16px}
}
.cs-grid>.card,.grid>*,.ex-layout>*{min-width:0}
.card{min-width:0;overflow-wrap:anywhere}
.card pre,.codeblock{max-width:100%}
@media (max-width:900px){.card table{display:block;overflow-x:auto}.card{padding:16px}}
.card .CodeMirror pre.CodeMirror-line,.card .CodeMirror pre.CodeMirror-line-like{background:transparent;padding:0 4px;margin:0;border-radius:0;font-size:inherit;color:inherit;white-space:pre;overflow:visible;max-width:none}
.card .CodeMirror{overflow-wrap:normal}