:root{
  --paper:#EEEFF4; --plate:#FFFFFF; --plate2:#E4E6EF; --plate3:#F6F7FA;
  --ink:#141828; --ink-soft:#565E7A; --line:#D2D6E2; --line-soft:#E4E7F0;
  --flux:#4B3FCF; --flux-soft:rgba(75,63,207,.10); --flux-line:rgba(75,63,207,.28);
  --ember:#B85B24; --ember-soft:rgba(184,91,36,.12);
  --ok:#146B54; --warn:#8C5F07; --stop:#A2342F;
  --grid:rgba(20,24,40,.05);
  --shadow:0 1px 2px rgba(20,24,40,.05),0 8px 24px -14px rgba(20,24,40,.28);
  --r:12px;
  --f-display:"Fraunces",Georgia,"Times New Roman",serif;
  --f-body:"Public Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-math:"STIX Two Text",Cambria,Georgia,serif;
  --f-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Consolas,monospace;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#0E111C; --plate:#161B2B; --plate2:#1E2438; --plate3:#131828;
    --ink:#E8EAF4; --ink-soft:#969DB8; --line:#2A3149; --line-soft:#222840;
    --flux:#9186FF; --flux-soft:rgba(145,134,255,.14); --flux-line:rgba(145,134,255,.34);
    --ember:#E39A5E; --ember-soft:rgba(227,154,94,.14);
    --ok:#4FBE99; --warn:#D5A24B; --stop:#E48A85;
    --grid:rgba(232,234,244,.045);
    --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px -16px rgba(0,0,0,.7);
  }
}
:root[data-theme="dark"]{
  --paper:#0E111C; --plate:#161B2B; --plate2:#1E2438; --plate3:#131828;
  --ink:#E8EAF4; --ink-soft:#969DB8; --line:#2A3149; --line-soft:#222840;
  --flux:#9186FF; --flux-soft:rgba(145,134,255,.14); --flux-line:rgba(145,134,255,.34);
  --ember:#E39A5E; --ember-soft:rgba(227,154,94,.14);
  --ok:#4FBE99; --warn:#D5A24B; --stop:#E48A85;
  --grid:rgba(232,234,244,.045);
  --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px -16px rgba(0,0,0,.7);
}
*{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{
  background:var(--paper);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:32px 32px;
  color:var(--ink);
  font-family:var(--f-body);
  font-size:1rem;line-height:1.6;
  min-height:100vh;
}
img{max-width:100%;display:block}
::selection{background:var(--flux-soft)}
:focus-visible{outline:2px solid var(--flux);outline-offset:2px;border-radius:4px}

/* ---------- chrome ---------- */
.shell{max-width:1240px;margin:0 auto;padding:0 20px 80px}
.topbar{
  position:sticky;top:0;z-index:40;
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding:12px 0;margin-bottom:4px;
  background:color-mix(in srgb,var(--paper) 88%,transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
}
.brand{display:flex;align-items:baseline;gap:9px;font-family:var(--f-display);font-weight:600;font-size:1.12rem;letter-spacing:-.01em}
.brand .mk{font-family:var(--f-math);color:var(--flux);font-size:1.35rem;line-height:1}
.tabs{display:flex;gap:2px;flex-wrap:wrap;margin-left:auto}
.tab{
  font:inherit;font-size:.86rem;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;background:none;color:var(--ink-soft);
  padding:6px 12px;border-radius:999px;cursor:pointer;white-space:nowrap;
}
.tab:hover{color:var(--ink);background:var(--plate2)}
.tab[aria-current="true"]{background:var(--flux);border-color:var(--flux);color:#fff}
@media(max-width:700px){
  .topbar{gap:8px 10px}
  .brand{flex:1 1 auto}
  .tabs{order:3;flex:1 0 100%;margin-left:0;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;padding-bottom:2px}
  .tabs::-webkit-scrollbar{display:none}
}
.iconbtn{font:inherit;border:1px solid var(--line);background:var(--plate);color:var(--ink-soft);
  width:34px;height:34px;border-radius:9px;cursor:pointer;display:grid;place-items:center;font-size:.95rem}
.iconbtn:hover{color:var(--ink);border-color:var(--ink-soft)}

/* ---------- hero ---------- */
.hero{position:relative;isolation:isolate;border-radius:16px;overflow:hidden;margin:14px 0 22px;border:1px solid var(--line);box-shadow:var(--shadow);background:#0B0E18}
.hero img{position:absolute;inset:0;z-index:-2;width:100%;height:100%;object-fit:cover}
.hero .veil{position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(8,10,20,.90) 0%,rgba(8,10,20,.62) 46%,rgba(8,10,20,.12) 100%)}
@media(max-width:700px){.hero .veil{background:linear-gradient(180deg,rgba(8,10,20,.70) 0%,rgba(8,10,20,.92) 55%)}}
.hero .txt{position:relative;display:flex;flex-direction:column;justify-content:center;gap:8px;padding:clamp(20px,4vw,40px);min-height:clamp(190px,25vw,300px);max-width:min(640px,92%)}
.hero h1{font-family:var(--f-display);font-weight:600;font-size:clamp(1.6rem,4vw,2.5rem);line-height:1.08;letter-spacing:-.02em;color:#F7F5FF;text-wrap:balance}
.hero p{color:#C8C6DE;font-size:clamp(.88rem,1.6vw,1rem);max-width:52ch}
.hero .kicker{font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;font-weight:700;color:#E39A5E}

/* ---------- layout ---------- */
.cols{display:grid;grid-template-columns:236px minmax(0,1fr);gap:26px;align-items:start}
.cols.even{grid-template-columns:minmax(0,1fr) minmax(0,1.12fr)}
@media(max-width:900px){.cols{grid-template-columns:1fr;gap:18px}}
.rail{position:sticky;top:64px;display:flex;flex-direction:column;gap:6px}
@media(max-width:900px){.rail{position:static;flex-direction:row;overflow-x:auto;padding-bottom:6px;gap:8px}}
.railtitle{font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;font-weight:700;color:var(--ink-soft);padding:4px 2px 6px}
@media(max-width:900px){.railtitle{display:none}}
.mchip{
  display:grid;grid-template-columns:auto 1fr;gap:2px 10px;align-items:center;
  border:1px solid var(--line);background:var(--plate);border-radius:10px;
  padding:8px 11px;cursor:pointer;text-align:left;font:inherit;color:var(--ink);
  transition:border-color .18s,transform .18s;position:relative;overflow:hidden;
}
@media(max-width:900px){.mchip{min-width:190px;flex:0 0 auto}}
.mchip:hover{border-color:var(--ink-soft)}
.mchip[aria-current="true"]{border-color:var(--flux);box-shadow:0 0 0 1px var(--flux-line)}
.mchip .code{font-family:var(--f-mono);font-size:.72rem;font-weight:500;color:var(--ink-soft);grid-row:1/3}
.mchip[aria-current="true"] .code{color:var(--flux)}
.mchip .nm{font-size:.85rem;font-weight:600;line-height:1.25}
.mchip .st{font-size:.7rem;color:var(--ink-soft)}
.mchip .heat{position:absolute;left:0;top:0;bottom:0;width:3px}
.mchip.done .nm{color:var(--ink-soft)}

/* ---------- cards ---------- */
.card{background:var(--plate);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;box-shadow:var(--shadow)}
.card + .card{margin-top:16px}
.card h2{font-family:var(--f-display);font-weight:600;font-size:1.08rem;letter-spacing:-.01em;margin-bottom:4px}
.card h3{font-family:var(--f-display);font-weight:600;font-size:1rem;margin-bottom:6px}
.eyebrow{font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;font-weight:700;color:var(--ink-soft)}
.sub{color:var(--ink-soft);font-size:.9rem;max-width:66ch}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;align-items:start}
.stack{display:flex;flex-direction:column;gap:16px}

/* ---------- console tiles ---------- */
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(158px,1fr));gap:12px;margin-bottom:16px}
.tile{background:var(--plate);border:1px solid var(--line);border-radius:11px;padding:12px 14px;box-shadow:var(--shadow)}
.tile .lb{font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;font-weight:700;color:var(--ink-soft)}
.tile .big{font-family:var(--f-mono);font-size:1.6rem;font-weight:500;font-variant-numeric:tabular-nums;line-height:1.2;margin:3px 0 1px}
.tile .hint{font-size:.76rem;color:var(--ink-soft)}
.meter{height:5px;border-radius:3px;background:var(--plate2);overflow:hidden;margin-top:7px}
.meter i{display:block;height:100%;background:var(--flux);border-radius:3px;transition:width .5s cubic-bezier(.4,0,.2,1)}
.meter i.hot{background:var(--ember)}

/* ---------- timer ---------- */
.face{font-family:var(--f-mono);font-size:clamp(1.9rem,5.6vw,2.9rem);font-weight:500;font-variant-numeric:tabular-nums;text-align:center;letter-spacing:.01em;margin:6px 0 2px}
.face.run{color:var(--flux)}
.face.run::after{content:"";display:inline-block;width:.28em;height:.28em;border-radius:50%;background:var(--flux);vertical-align:.42em;margin-left:.22em;animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:.25}50%{opacity:1}}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.row.c{justify-content:center}
button{font:inherit;font-weight:600;font-size:.88rem;border:1px solid var(--line);background:var(--plate2);color:var(--ink);border-radius:9px;padding:8px 14px;cursor:pointer;transition:border-color .15s,background .15s}
button:hover:not(:disabled){border-color:var(--ink-soft)}
button.primary{background:var(--flux);border-color:var(--flux);color:#fff}
button.primary:hover:not(:disabled){filter:brightness(1.1)}
button.ghost{background:transparent}
button.sm{padding:5px 11px;font-size:.8rem}
button:disabled{opacity:.42;cursor:default}
input,select,textarea{font:inherit;font-size:.88rem;background:var(--plate3);color:var(--ink);border:1px solid var(--line);border-radius:9px;padding:8px 10px;width:100%}
label{font-size:.76rem;letter-spacing:.06em;text-transform:uppercase;font-weight:700;color:var(--ink-soft)}
.field{display:flex;flex-direction:column;gap:4px;min-width:0}
.fgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-top:10px;align-items:end}

/* ---------- prose ---------- */
.prose{max-width:68ch}
.prose p{margin-bottom:.95em;text-wrap:pretty}
.prose p:last-child{margin-bottom:0}
.sec{padding-top:20px;margin-top:20px;border-top:1px solid var(--line-soft)}
.sec:first-of-type{border-top:none;margin-top:0;padding-top:0}
.sec h3{font-size:1.12rem;margin-bottom:10px}
.formula{
  font-family:var(--f-math);font-size:1.16rem;line-height:1.7;
  background:var(--plate3);border:1px solid var(--line-soft);border-left:3px solid var(--flux);
  border-radius:0 9px 9px 0;padding:14px 18px;margin:14px 0;overflow-x:auto;
}
.formula i{font-style:italic}
.formula .rd{display:block;font-family:var(--f-body);font-style:normal;font-size:.82rem;color:var(--ink-soft);margin-top:9px;line-height:1.5;max-width:64ch}
.exbox{background:var(--ember-soft);border-radius:9px;padding:13px 16px;margin:14px 0}
.exbox .t{font-family:var(--f-display);font-weight:600;font-size:.92rem;margin-bottom:4px;color:var(--ember)}
.exbox p{font-size:.9rem;margin:0}
.pull{font-family:var(--f-display);font-size:1.05rem;font-style:italic;color:var(--ink-soft);border-left:2px solid var(--ember);padding-left:14px;margin:2px 0 16px}

/* ---------- module cover ---------- */
.cover{position:relative;isolation:isolate;border-radius:13px;overflow:hidden;border:1px solid var(--line);margin-bottom:16px;background:#0B0E18}
.cover img{position:absolute;inset:0;z-index:-2;width:100%;height:100%;object-fit:cover}
.cover .veil{position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(8,10,20,.88),rgba(8,10,20,.30))}
@media(max-width:700px){.cover .veil{background:linear-gradient(180deg,rgba(8,10,20,.55),rgba(8,10,20,.92))}}
.cover .txt{position:relative;display:flex;flex-direction:column;justify-content:flex-end;gap:2px;padding:16px 20px;min-height:clamp(130px,17vw,190px)}
.cover .code{font-family:var(--f-mono);font-size:.74rem;color:#E39A5E;letter-spacing:.08em}
.cover h2{font-family:var(--f-display);font-size:clamp(1.2rem,2.6vw,1.7rem);color:#F7F5FF;letter-spacing:-.01em}
.cover .wk{font-size:.78rem;color:#B9B7D2}

/* ---------- collapsibles ---------- */
details{border:1px solid var(--line);border-radius:10px;background:var(--plate3);margin-bottom:8px}
details[open]{background:var(--plate)}
summary{cursor:pointer;padding:11px 14px;font-weight:600;font-size:.9rem;list-style:none;display:flex;gap:10px;align-items:baseline}
summary::-webkit-details-marker{display:none}
summary::before{content:"+";font-family:var(--f-mono);color:var(--flux);font-weight:500;flex:0 0 auto}
details[open] summary::before{content:"−"}
details .body{padding:0 14px 13px 32px;font-size:.9rem;color:var(--ink-soft)}
.vid{display:flex;gap:11px;align-items:baseline;padding:9px 0;border-bottom:1px solid var(--line-soft)}
.vid:last-child{border-bottom:none}
.vid a{color:var(--flux);text-decoration:none;font-weight:600;font-size:.9rem}
.vid a:hover{text-decoration:underline}
.vid .src{font-size:.74rem;color:var(--ink-soft);font-family:var(--f-mono)}
.vid .nt{font-size:.82rem;color:var(--ink-soft);margin-top:2px}

/* ---------- lab ---------- */
.lab{border:1px solid var(--line);border-radius:12px;background:var(--plate3);padding:16px;margin:18px 0}
.lab .lh{display:flex;justify-content:space-between;align-items:baseline;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.lab canvas{width:100%;height:auto;display:block;border-radius:9px;background:var(--plate);border:1px solid var(--line-soft)}
.lab .ctl{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-top:12px}
.slider{display:flex;flex-direction:column;gap:3px}
.slider .hd{display:flex;justify-content:space-between;font-size:.75rem}
.slider .hd b{font-family:var(--f-mono);font-weight:500;color:var(--flux)}
input[type=range]{-webkit-appearance:none;appearance:none;background:transparent;padding:0;border:none;height:20px;cursor:pointer}
input[type=range]::-webkit-slider-runnable-track{height:4px;border-radius:2px;background:var(--plate2)}
input[type=range]::-moz-range-track{height:4px;border-radius:2px;background:var(--plate2)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:15px;height:15px;border-radius:50%;background:var(--flux);margin-top:-5.5px;border:2px solid var(--plate)}
input[type=range]::-moz-range-thumb{width:15px;height:15px;border-radius:50%;background:var(--flux);border:2px solid var(--plate)}
.readout{font-family:var(--f-mono);font-size:.8rem;color:var(--ink-soft);font-variant-numeric:tabular-nums;margin-top:10px;line-height:1.7}
.readout b{color:var(--ink);font-weight:500}
.tokrow{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.tok{font-family:var(--f-mono);font-size:.8rem;padding:5px 10px;border-radius:7px;border:1px solid var(--line);background:var(--plate);cursor:pointer;transition:all .18s}
.tok[aria-pressed="true"]{background:var(--flux);border-color:var(--flux);color:#fff}
.stepnote{font-size:.85rem;color:var(--ink-soft);min-height:2.6em;margin-top:10px;max-width:62ch}
.stepnote b{color:var(--ink)}

/* ---------- tables ---------- */
.tw{overflow-x:auto;margin-top:10px}
table{width:100%;border-collapse:collapse;font-size:.87rem}
th{text-align:left;font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);padding:7px 9px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:8px 9px;border-bottom:1px solid var(--line-soft);vertical-align:top}
tr:last-child td{border-bottom:none}
td.sym{font-family:var(--f-math);font-size:1.18rem;color:var(--flux);width:1%;white-space:nowrap;padding-right:14px}
td.nm{font-weight:600;white-space:nowrap}
td.mod{font-family:var(--f-mono);font-size:.76rem;color:var(--ink-soft);width:1%}
.pill{font-size:.66rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;border-radius:999px;padding:3px 9px;white-space:nowrap;display:inline-block}
.pill.ativo{background:var(--flux-soft);color:var(--flux)}
.pill.bloq{background:var(--plate2);color:var(--ink-soft)}
.pill.feito{background:var(--ember-soft);color:var(--ember)}
.empty{color:var(--ink-soft);font-size:.88rem;padding:10px 0}

/* ---------- misc ---------- */
.banner{padding:9px 14px;border-radius:9px;background:var(--flux-soft);border:1px solid var(--flux-line);font-size:.86rem;margin-bottom:14px;display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.banner b{font-weight:700}
.banner.warn{background:var(--ember-soft);border-color:var(--ember)}
.rev{display:flex;gap:10px;align-items:center;padding:9px 0;border-bottom:1px solid var(--line-soft)}
.rev:last-child{border-bottom:none}
.rev .c{flex:1;min-width:0;font-size:.89rem}
.rev .c small{display:block;color:var(--ink-soft);font-size:.74rem;font-family:var(--f-mono)}
.rev .due{font-size:.76rem;color:var(--ink-soft);font-family:var(--f-mono);white-space:nowrap}
.rev.late .due{color:var(--ember);font-weight:600}
.toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%) translateY(8px);background:var(--ink);color:var(--paper);padding:9px 18px;border-radius:999px;font-size:.86rem;font-weight:600;opacity:0;pointer-events:none;transition:opacity .22s,transform .22s;z-index:90}
.toast.on{opacity:1;transform:translateX(-50%) translateY(0)}
.ledger{font-family:var(--f-mono);font-size:.74rem;min-height:240px;line-height:1.6;white-space:pre;overflow-x:auto}
footer{margin-top:30px;padding-top:16px;border-top:1px solid var(--line-soft);color:var(--ink-soft);font-size:.78rem;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.fade{animation:fade .34s cubic-bezier(.2,.7,.3,1) both}
@keyframes fade{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:none}}
.stagger>*{animation:fade .34s cubic-bezier(.2,.7,.3,1) both}
.stagger>*:nth-child(1){animation-delay:.02s}
.stagger>*:nth-child(2){animation-delay:.06s}
.stagger>*:nth-child(3){animation-delay:.10s}
.stagger>*:nth-child(4){animation-delay:.14s}
.stagger>*:nth-child(5){animation-delay:.18s}
.stagger>*:nth-child(6){animation-delay:.22s}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
}
.livro{padding:11px 0;border-bottom:1px solid var(--line-soft)}
.livro:last-child{border-bottom:none}
.livro .lt a{font-family:var(--f-display);font-weight:600;font-size:1rem;color:var(--ink);text-decoration:none;border-bottom:1px solid var(--flux-line)}
.livro .lt a:hover{color:var(--flux)}
.livro .la{font-size:.8rem;color:var(--ink-soft);margin-top:2px}
.livro .lc{font-size:.84rem;color:var(--ember);font-weight:600;margin-top:5px}
.livro .ln{font-size:.86rem;color:var(--ink-soft);margin-top:3px;max-width:64ch}

/* ===================== NARRAÇÃO ===================== */
.sec-cab{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap}
.sec-cab h3{margin:0}
.aud{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--flux-line);background:var(--flux-soft);
  color:var(--flux);font:500 .74rem/1 'Public Sans',system-ui,sans-serif;letter-spacing:.05em;text-transform:uppercase;
  padding:7px 12px 7px 10px;border-radius:999px;cursor:pointer;transition:background .18s,border-color .18s,color .18s}
.aud:hover{background:color-mix(in srgb,var(--flux) 16%,transparent)}
.aud .aud-ico{width:11px;height:11px;flex:none;background:currentColor;
  clip-path:polygon(0 0,100% 50%,0 100%);transition:clip-path .2s}
.aud.on{background:var(--flux);border-color:var(--flux);color:var(--plate)}
.aud.on .aud-ico{clip-path:inset(0)}
:root[data-theme="dark"] .aud.on,:root:not([data-theme="light"]) .aud.on{color:#0E111C}
@media (prefers-color-scheme: light){:root:not([data-theme="dark"]) .aud.on{color:#fff}}
.sec.tocando{position:relative}
.sec.tocando::before{content:"";position:absolute;left:-18px;top:2px;bottom:2px;width:3px;border-radius:2px;
  background:linear-gradient(180deg,var(--flux),var(--ember));animation:pulsa 2.4s ease-in-out infinite}
@keyframes pulsa{0%,100%{opacity:.45}50%{opacity:1}}
.sec.realce{animation:realce 2.4s ease-out}
@keyframes realce{0%{background:var(--flux-soft)}100%{background:transparent}}
.vels{display:inline-flex;gap:2px;border:1px solid var(--line);border-radius:999px;padding:2px;background:var(--plate)}
.vel{border:0;background:transparent;color:var(--ink-soft);font:500 .7rem/1 'JetBrains Mono',monospace;
  padding:5px 9px;border-radius:999px;cursor:pointer}
.vel.on{background:var(--ink);color:var(--paper)}
.cover-aud{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:14px}
.mic{width:38px;height:38px;flex:none;border:1px solid var(--line);background:var(--plate);border-radius:10px;
  cursor:pointer;display:grid;place-items:center;transition:border-color .18s,background .18s}
.mic span{width:11px;height:16px;border-radius:6px;background:var(--ink-soft);position:relative;transition:background .18s}
.mic span::after{content:"";position:absolute;left:50%;bottom:-6px;transform:translateX(-50%);width:15px;height:5px;
  border:1.5px solid var(--ink-soft);border-top:0;border-radius:0 0 9px 9px;transition:border-color .18s}
.mic:hover{border-color:var(--flux-line)}
.mic.on{background:var(--ember-soft);border-color:var(--ember)}
.mic.on span,.mic.on span::after{background:var(--ember);border-color:var(--ember)}
.mic.on{animation:pulsa 1.4s ease-in-out infinite}

/* ===================== TUTOR ===================== */
.trilhos{display:grid;gap:10px;margin-top:14px}
.trilho{display:grid;gap:5px;text-align:left;border:1px solid var(--line);background:var(--plate);
  border-radius:var(--r);padding:14px 16px 12px;cursor:pointer;transition:border-color .18s,transform .18s,box-shadow .18s}
.trilho:hover{border-color:var(--flux-line);transform:translateY(-1px);box-shadow:var(--shadow)}
.trilho.feito{border-color:color-mix(in srgb,var(--ok) 40%,var(--line))}
.tr-nome{font:600 1.02rem/1.3 'Fraunces',Georgia,serif;color:var(--ink)}
.tr-meta{font:400 .78rem/1.4 'Public Sans',system-ui,sans-serif;color:var(--ink-soft)}
.tr-barra{height:3px;border-radius:2px;background:var(--line-soft);overflow:hidden;margin-top:4px}
.tr-barra i{display:block;height:100%;background:linear-gradient(90deg,var(--flux),var(--ember));transition:width .4s}
.tt-topo{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.tag{font:500 .68rem/1 'JetBrains Mono',monospace;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft);
  border:1px solid var(--line);border-radius:999px;padding:5px 10px;white-space:nowrap}
.enun{font:400 1.02rem/1.65 'Public Sans',system-ui,sans-serif;color:var(--ink);max-width:66ch;margin:10px 0 0}
.passos-barra{display:flex;align-items:center;gap:5px;margin:20px 0 4px}
.passos-barra .pb{width:26px;height:4px;border-radius:2px;background:var(--line-soft);transition:background .3s}
.passos-barra .pb.ok{background:var(--ok)}
.passos-barra .pb.agora{background:var(--flux)}
.passos-barra em{margin-left:8px;font:500 .72rem/1 'JetBrains Mono',monospace;font-style:normal;color:var(--ink-soft)}
.passo{margin-top:18px;border-top:1px solid var(--line-soft);padding-top:20px}
.p-pergunta{font:500 1.16rem/1.55 'Fraunces',Georgia,serif;color:var(--ink);max-width:60ch}
.p-entrada{margin-top:16px}
.linha-resp{display:flex;gap:8px;align-items:center;max-width:440px}
input.resp{flex:1;border:1px solid var(--line);background:var(--plate);color:var(--ink);border-radius:10px;
  padding:11px 14px;font:500 1.05rem/1 'JetBrains Mono',monospace;transition:border-color .18s,box-shadow .18s}
input.resp:focus{outline:0;border-color:var(--flux);box-shadow:0 0 0 3px var(--flux-soft)}
.opcoes{display:grid;gap:8px;max-width:600px}
.opcao{display:flex;gap:11px;align-items:flex-start;border:1px solid var(--line);background:var(--plate);
  border-radius:10px;padding:12px 14px;cursor:pointer;transition:border-color .18s,background .18s}
.opcao:hover{border-color:var(--flux-line)}
.opcao input{margin-top:3px;accent-color:var(--flux)}
.opcao:has(input:checked){border-color:var(--flux);background:var(--flux-soft)}
.p-acoes{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
button.pri{border:0;background:var(--flux);color:#fff;font:600 .86rem/1 'Public Sans',system-ui,sans-serif;
  padding:11px 20px;border-radius:9px;cursor:pointer;transition:filter .18s}
button.pri:hover{filter:brightness(1.08)}
:root[data-theme="dark"] button.pri,:root:not([data-theme="light"]) button.pri{color:#0E111C}
@media (prefers-color-scheme: light){:root:not([data-theme="dark"]) button.pri{color:#fff}}
.p-retorno{margin-top:16px}
.p-retorno:empty{display:none}
.p-retorno{border-left:3px solid var(--line);padding:2px 0 2px 15px;display:grid;gap:5px;
  font:400 .95rem/1.6 'Public Sans',system-ui,sans-serif;color:var(--ink-soft);max-width:62ch}
.p-retorno b{font-weight:600;color:var(--ink)}
.p-retorno.certo{border-color:var(--ok)}
.p-retorno.certo b{color:var(--ok)}
.p-retorno.errado{border-color:var(--ember)}
.p-retorno.errado b{color:var(--ember)}
.p-retorno.aviso{border-color:var(--warn)}
.dicas{display:grid;gap:9px;margin-top:18px}
.dica{display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:baseline;border-radius:10px;padding:12px 14px;
  background:var(--plate3);border:1px solid var(--line-soft);font:400 .93rem/1.6 'Public Sans',system-ui,sans-serif;color:var(--ink)}
.dica b{font:500 .68rem/1 'JetBrains Mono',monospace;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft);white-space:nowrap}
.dica.n1{border-left:3px solid color-mix(in srgb,var(--flux) 55%,transparent)}
.dica.n2{border-left:3px solid color-mix(in srgb,var(--flux) 75%,var(--ember))}
.dica.n3{border-left:3px solid color-mix(in srgb,var(--ember) 70%,var(--flux))}
.dica.n4{border-left:3px solid var(--ember)}
.fecho{margin-top:22px;border-top:1px solid var(--line-soft);padding-top:20px}
.fecho h3{margin:0 0 8px;color:var(--ok)}
.fecho p{max-width:64ch}
.acoes{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.muted{color:var(--ink-soft);font-size:.86rem}
.linkish{border:0;background:transparent;color:var(--flux);font:600 .95rem/1.4 'Public Sans',system-ui,sans-serif;
  cursor:pointer;padding:0;text-align:left;text-decoration:underline;text-underline-offset:3px}

/* ===================== MESA DE DÚVIDAS ===================== */
.duv-barra{display:flex;gap:8px;align-items:center;margin-top:16px;flex-wrap:wrap}
#duv-q{flex:1;min-width:240px;border:1px solid var(--line);background:var(--plate);color:var(--ink);
  border-radius:10px;padding:13px 16px;font:400 1rem/1.3 'Public Sans',system-ui,sans-serif;transition:border-color .18s,box-shadow .18s}
#duv-q:focus{outline:0;border-color:var(--flux);box-shadow:0 0 0 3px var(--flux-soft)}
.chips{display:flex;gap:7px;flex-wrap:wrap;margin-top:12px}
.chip{border:1px solid var(--line);background:var(--plate);color:var(--ink-soft);border-radius:999px;
  padding:7px 13px;font:400 .82rem/1.3 'Public Sans',system-ui,sans-serif;cursor:pointer;transition:border-color .18s,color .18s}
.chip:hover{border-color:var(--flux-line);color:var(--flux)}
.chips.grande .chip{font-size:.9rem;padding:9px 15px}
.card.destaque{border-color:var(--flux-line);box-shadow:0 0 0 1px var(--flux-soft),var(--shadow)}
.resposta{margin-top:12px;max-width:66ch}
.resposta p{font:400 1rem/1.72 'Public Sans',system-ui,sans-serif;color:var(--ink);margin:0 0 11px}
.achados{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:14px}
.achados li{display:grid;gap:6px;border-top:1px solid var(--line-soft);padding-top:14px}
.achados li .tag{justify-self:start}
.achados li b{font:600 1rem/1.4 'Fraunces',Georgia,serif;color:var(--ink)}
.trecho{font:400 .92rem/1.65 'Public Sans',system-ui,sans-serif;color:var(--ink-soft);max-width:70ch}
.claude-box{display:grid;gap:6px}
.claude-box h3{margin:0}
pre.prompt{margin:12px 0 0;background:var(--plate3);border:1px solid var(--line-soft);border-radius:10px;
  padding:14px 16px;font:400 .84rem/1.6 'JetBrains Mono',monospace;color:var(--ink);white-space:pre-wrap;
  word-break:break-word;max-width:80ch}
.btn-arquivo{display:inline-flex;align-items:center;cursor:pointer}

/* ===================== KaTeX ===================== */
.katex{font-size:1.06em;color:var(--ink)}
.formula .katex-display{margin:0}
.formula .katex-display>.katex{white-space:normal}
.p-pergunta .katex,.dica .katex,.opcao .katex,.resposta .katex{font-size:1em}
.katex-display{overflow-x:auto;overflow-y:hidden;padding:2px 0}

/* correções de responsividade do tutor */
.tag{white-space:normal;overflow-wrap:anywhere;max-width:100%}
.tt-topo .tag{text-align:right}
@media (max-width:560px){
  .tt-topo{flex-direction:column;align-items:flex-start}
  .tt-topo .tag{text-align:left}
  .passos-barra{flex-wrap:wrap}
  .passos-barra .pb{width:18px}
  .linha-resp{max-width:100%}
  .duv-barra #duv-q{min-width:0}
  .dica{grid-template-columns:1fr;gap:4px}
}
/* as alternativas são texto corrente, não rótulo de formulário */
label.opcao{font-size:1rem;letter-spacing:normal;text-transform:none;font-weight:400;color:var(--ink);text-align:left}
label.opcao>span{flex:1;font:400 .98rem/1.55 'Public Sans',system-ui,sans-serif;color:var(--ink);text-align:left}
label.btn-arquivo{font-size:.86rem;letter-spacing:normal;text-transform:none;font-weight:600}
.opcao input[type=radio]{width:17px;height:17px;flex:none;padding:0;border:0;background:transparent;border-radius:50%}

/* coluna de contexto ao lado do passo */
.passo-grade{display:grid;grid-template-columns:minmax(0,1fr) 268px;gap:34px;align-items:start}
.passo-grade .passo{min-width:0}
.p-lado{display:grid;gap:16px;margin-top:38px;border-left:1px solid var(--line-soft);padding-left:22px}
.lado-bloco{display:grid;gap:6px}
.lado-bloco b{font:600 .98rem/1.4 'Fraunces',Georgia,serif;color:var(--ink)}
.lado-acoes{display:flex;gap:7px;flex-wrap:wrap;margin-top:3px}
.formula.mini{font-size:.9rem;padding:10px 12px;border-left:2px solid var(--flux-line);background:var(--plate3);border-radius:8px;overflow-x:auto}
.formula.mini .katex-display{margin:0}
@media (max-width:940px){
  .passo-grade{grid-template-columns:1fr;gap:24px}
  .p-lado{margin-top:6px;border-left:0;border-top:1px solid var(--line-soft);padding-left:0;padding-top:18px}
}