@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@500;600;700&family=IBM+Plex+Mono:wght@400;500;600&family=Source+Sans+3:ital,wght@0,400;0,600;1,400&display=swap');

/* ============================================================
   Identidade: painel de instrumentos / prancha de desenho.
   Neutro grafite frio, acento âmbar de ponteiro de manômetro.
   ============================================================ */
:root{
  --bg:#f2f4f6;
  --surface:#ffffff;
  --surface-2:#e9ecf0;
  --ink:#141821;
  --ink-2:#4a5361;
  --ink-3:#78828f;
  --line:#d7dce3;
  --line-strong:#b9c1cc;

  --accent:#a35c07;          /* âmbar queimado — ponteiro */
  --accent-ink:#ffffff;
  --accent-wash:#fbf1e2;

  --ok:#0d6b4f;
  --ok-wash:#e4f2ec;
  --bad:#a52a1f;
  --bad-wash:#fbeae8;
  --warn:#8a6a00;

  --r:6px;
  --shadow:0 1px 0 rgba(20,24,33,.04), 0 1px 3px rgba(20,24,33,.06);

  --display:"Archivo","Segoe UI",system-ui,sans-serif;
  --body:"Source Sans 3","Segoe UI",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0e1116;
    --surface:#161a21;
    --surface-2:#1e232c;
    --ink:#e4e9f0;
    --ink-2:#a4aeba;
    --ink-3:#7c8794;
    --line:#262c36;
    --line-strong:#39414d;

    --accent:#e2a44b;
    --accent-ink:#141821;
    --accent-wash:#2a2013;

    --ok:#3fc796;
    --ok-wash:#0f2b22;
    --bad:#ff7f70;
    --bad-wash:#2e1613;
    --warn:#d9b34a;

    --shadow:0 1px 0 rgba(0,0,0,.3), 0 2px 10px rgba(0,0,0,.35);
  }
}
:root[data-theme="dark"]{
  --bg:#0e1116;
  --surface:#161a21;
  --surface-2:#1e232c;
  --ink:#e4e9f0;
  --ink-2:#a4aeba;
  --ink-3:#7c8794;
  --line:#262c36;
  --line-strong:#39414d;

  --accent:#e2a44b;
  --accent-ink:#141821;
  --accent-wash:#2a2013;

  --ok:#3fc796;
  --ok-wash:#0f2b22;
  --bad:#ff7f70;
  --bad-wash:#2e1613;
  --warn:#d9b34a;

  --shadow:0 1px 0 rgba(0,0,0,.3), 0 2px 10px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--ink);
  font:400 16px/1.6 var(--body);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3{font-family:var(--display);font-weight:600;letter-spacing:-.012em;text-wrap:balance;margin:0}
h1{font-size:1.72rem;line-height:1.2;margin-bottom:.35rem}
h2{font-size:.78rem;font-weight:600;text-transform:uppercase;letter-spacing:.13em;
   font-family:var(--mono);color:var(--ink-3);margin:2.2rem 0 .9rem}
h3{font-size:1rem;margin-bottom:.45rem}
p{margin:.5rem 0}
a{color:var(--accent)}
.muted{color:var(--ink-3);font-size:.86rem}
.lead{color:var(--ink-2);max-width:66ch;font-size:1.02rem}
.hidden{display:none !important}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (prefers-reduced-motion: reduce){*{animation:none !important;transition:none !important}}

/* ===== painel superior ===== */
.topbar{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:1rem;flex-wrap:wrap;
  padding:.55rem clamp(.8rem,3vw,2rem);
  background:var(--surface);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:.65rem;min-width:0}
.brand .logo{
  width:34px;height:34px;flex:none;display:grid;place-items:center;
  background:var(--ink);color:var(--bg);border-radius:3px;font-size:17px;
}
.brand strong{
  display:block;font-family:var(--display);font-size:.86rem;font-weight:600;
  letter-spacing:.005em;
}
.brand small{
  display:block;color:var(--ink-3);font-size:.68rem;
  font-family:var(--mono);letter-spacing:.02em;
}
.mainnav{display:flex;gap:.1rem;flex-wrap:wrap;margin-left:auto}
.mainnav button{
  background:none;border:0;padding:.4rem .65rem;border-radius:3px;
  color:var(--ink-2);cursor:pointer;
  font-family:var(--mono);font-size:.74rem;font-weight:500;
  text-transform:uppercase;letter-spacing:.07em;
  border-bottom:2px solid transparent;
}
.mainnav button:hover{color:var(--ink);background:var(--surface-2)}
.mainnav button.active{color:var(--ink);border-bottom-color:var(--accent)}
.icon{
  background:var(--surface-2);border:1px solid var(--line);color:var(--ink);
  width:32px;height:32px;border-radius:3px;cursor:pointer;font-size:14px;
}
.icon:hover{border-color:var(--line-strong)}

/* ===== layout ===== */
main{max-width:1020px;margin:0 auto;padding:clamp(1.1rem,3vw,2.2rem)}
.view{display:none}
.view.active{display:block;animation:rise .2s ease}
@keyframes rise{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}

.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:1rem 1.15rem;box-shadow:var(--shadow);margin:.9rem 0;
}
.card.info{border-top:2px solid var(--accent)}
.card.info ul{margin:.5rem 0 .3rem 1.05rem;padding:0}
.card.info li{margin:.25rem 0;font-size:.95rem}

.row{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap}
.row.between{justify-content:space-between}
.row.center{justify-content:center}
.row.gap{gap:.7rem;margin-top:1.1rem}
.btnset{display:flex;gap:.3rem;flex-wrap:wrap}

/* ===== botões ===== */
.btn{
  background:var(--surface);border:1px solid var(--line-strong);color:var(--ink);
  padding:.5rem .95rem;border-radius:3px;cursor:pointer;
  font-family:var(--body);font-size:.92rem;font-weight:600;
  transition:background .12s,border-color .12s,color .12s;
}
.btn:hover{border-color:var(--accent);color:var(--accent)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.08);color:var(--accent-ink)}
.btn.ghost{background:transparent;border-color:var(--line)}
.btn.tiny{
  padding:.28rem .55rem;font-family:var(--mono);font-size:.72rem;font-weight:500;
  text-transform:uppercase;letter-spacing:.06em;
}
.btn.wide{width:100%;margin-top:.9rem;padding:.68rem}
.btn:disabled{opacity:.4;cursor:not-allowed}

/* ===== hero + contagem ===== */
.hero{display:grid;grid-template-columns:1fr auto;gap:1.6rem;align-items:center}
.herobtns{display:flex;gap:.6rem;margin-top:1.1rem;flex-wrap:wrap}
.countdown{
  text-align:center;min-width:200px;margin:0;
  border-top:2px solid var(--accent);
}
.countdown .d{
  display:block;font-family:var(--mono);font-size:2.9rem;font-weight:600;
  color:var(--ink);line-height:1;font-variant-numeric:tabular-nums;
}
.countdown .lbl{
  display:block;font-family:var(--mono);font-size:.66rem;color:var(--ink-3);
  text-transform:uppercase;letter-spacing:.12em;margin-top:.4rem;
}
.countdown .date{
  font-family:var(--mono);font-size:.76rem;margin-top:.7rem;padding-top:.6rem;
  border-top:1px solid var(--line);color:var(--ink-2);
}
@media(max-width:720px){.hero{grid-template-columns:1fr}}

/* ===== indicadores ===== */
.statgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(146px,1fr));gap:.7rem;margin:1.5rem 0}
.stat{text-align:left;margin:0;padding:.85rem .95rem}
.stat-n{
  display:block;font-family:var(--mono);font-size:1.75rem;font-weight:600;
  color:var(--ink);line-height:1.1;font-variant-numeric:tabular-nums;
}
.stat-l{
  display:block;font-family:var(--mono);font-size:.66rem;color:var(--ink-3);
  text-transform:uppercase;letter-spacing:.09em;margin-top:.4rem;line-height:1.4;
}

.temagrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(248px,1fr));gap:.6rem}
.temacard{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:.7rem .8rem;cursor:pointer;transition:border-color .12s,transform .12s;
  text-align:left;font:inherit;color:inherit;width:100%;
}
.temacard:hover{border-color:var(--accent);transform:translateY(-1px)}
.temacard .tt{display:flex;justify-content:space-between;gap:.5rem;align-items:baseline}
.temacard .tt span:first-child{font-family:var(--display);font-size:.9rem;font-weight:600}
.temacard .tt span:last-child{
  font-family:var(--mono);font-size:.7rem;color:var(--ink-3);white-space:nowrap;
  font-variant-numeric:tabular-nums;
}
.bar{height:4px;background:var(--surface-2);margin-top:.55rem;overflow:hidden}
.bar i{display:block;height:100%;background:var(--ok);transition:width .3s}
.bar i.low{background:var(--bad)} .bar i.mid{background:var(--warn)}
.temacard .sub{
  font-family:var(--mono);font-size:.68rem;color:var(--ink-3);margin-top:.4rem;
  letter-spacing:.02em;
}

.danger-zone{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;margin-top:2.2rem}
.danger-zone p{margin:.15rem 0 0}

/* ===== formulários ===== */
.checkgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(232px,1fr));gap:.15rem;margin-top:.9rem}
.checkgrid label{
  display:flex;align-items:center;gap:.5rem;padding:.35rem .5rem;border-radius:3px;
  font-size:.9rem;cursor:pointer;
}
.checkgrid label:hover{background:var(--surface-2)}
.checkgrid .cnt{
  margin-left:auto;color:var(--ink-3);font-family:var(--mono);font-size:.7rem;
  font-variant-numeric:tabular-nums;
}
input[type=checkbox]{accent-color:var(--accent);width:15px;height:15px;flex:none}
.optrow{display:flex;gap:1.2rem;flex-wrap:wrap;align-items:end}
.optrow label{
  display:flex;flex-direction:column;gap:.3rem;
  font-family:var(--mono);font-size:.68rem;color:var(--ink-3);
  text-transform:uppercase;letter-spacing:.09em;
}
.optrow label.chk{
  flex-direction:row;align-items:center;gap:.45rem;text-transform:none;
  letter-spacing:0;font-family:var(--body);font-size:.9rem;color:var(--ink);
  padding-bottom:.45rem;
}
select{
  background:var(--surface);color:var(--ink);border:1px solid var(--line-strong);
  border-radius:3px;padding:.42rem .55rem;font-family:var(--body);font-size:.92rem;
}

/* ===== barra de execução ===== */
.runbar{
  display:flex;align-items:center;gap:.9rem;flex-wrap:wrap;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:.5rem .75rem;margin-bottom:1rem;
}
.runbar.sticky{position:sticky;top:53px;z-index:20}
.progresswrap{flex:1;display:flex;align-items:center;gap:.6rem;min-width:150px}
.progressbar{flex:1;height:4px;background:var(--surface-2);overflow:hidden}
.progressbar i{display:block;height:100%;background:var(--accent);width:0;transition:width .25s}
.progresswrap span{
  font-family:var(--mono);font-size:.72rem;color:var(--ink-3);white-space:nowrap;
  font-variant-numeric:tabular-nums;
}
.placar{font-family:var(--mono);font-size:.78rem;color:var(--ink-2);white-space:nowrap;font-variant-numeric:tabular-nums}
.clock{font-family:var(--mono);font-variant-numeric:tabular-nums;font-weight:600;font-size:.9rem}
.clock.warn{color:var(--bad)}

.navgrid{display:flex;flex-wrap:wrap;gap:.2rem;margin-bottom:1rem}
.navgrid button{
  width:28px;height:28px;border-radius:2px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink-3);cursor:pointer;
  font-family:var(--mono);font-size:.68rem;font-variant-numeric:tabular-nums;
}
.navgrid button.done{background:var(--surface-2);border-color:var(--line-strong);color:var(--ink)}
.navgrid button.flag{border-color:var(--accent);color:var(--accent)}
.navgrid button.cur{outline:2px solid var(--accent);outline-offset:1px}

/* ===== questão ===== */
.q{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:1.15rem 1.25rem;box-shadow:var(--shadow);margin-bottom:1rem;
}
.qhead{
  display:flex;justify-content:space-between;gap:.6rem;align-items:flex-start;
  margin-bottom:.85rem;padding-bottom:.7rem;border-bottom:1px solid var(--line);flex-wrap:wrap;
}
.qtags{display:flex;gap:.4rem;flex-wrap:wrap;align-items:center}
.tag{
  font-family:var(--mono);font-size:.66rem;text-transform:uppercase;letter-spacing:.07em;
  color:var(--ink-3);
}
.tag+.tag::before{content:"·";margin-right:.4rem;color:var(--line-strong)}
.tag.tema{color:var(--ink);font-weight:600}
.tag.facil{color:var(--ok)} .tag.medio{color:var(--warn)} .tag.dificil{color:var(--bad)}
.qacoes{display:flex;align-items:center;gap:.5rem;flex:none}
.verbbtn{white-space:nowrap}
.starbtn{background:none;border:0;font-size:1.05rem;color:var(--line-strong);cursor:pointer;line-height:1;padding:0}
.starbtn:hover{color:var(--accent)}
.starbtn.on{color:var(--accent)}

.qtexto{margin:0 0 .5rem;white-space:pre-wrap;color:var(--ink-2);max-width:70ch}
/* termo sob análise no enunciado: destacado por cor, não apenas por peso */
.termo{
  background:var(--accent-wash);color:var(--accent);
  font-weight:600;padding:.05em .32em;border-radius:3px;
  border-bottom:2px solid var(--accent);
  -webkit-box-decoration-break:clone;box-decoration-break:clone;
}
.qbox{
  background:var(--surface-2);border-left:2px solid var(--line-strong);
  padding:.7rem .9rem;margin:.8rem 0;
  font-family:var(--mono);font-size:.84rem;line-height:1.5;
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:.34rem 1.1rem;
  align-items:baseline;overflow-x:auto;
}
.qbox .d-full{grid-column:1/-1}
.qbox .d-k{color:var(--ink-3);white-space:nowrap}
.qbox .d-v{color:var(--ink);white-space:pre-wrap}
.qbox .d-gap{height:.35rem}
@media(max-width:520px){
  .qbox{grid-template-columns:minmax(0,1fr);gap:.15rem}
  .qbox .d-k{color:var(--ink-3);margin-top:.3rem}
}
.qpergunta{font-weight:600;margin:.9rem 0 .95rem;max-width:70ch}

/* folha de respostas */
.alts{display:flex;flex-direction:column;gap:.5rem}
.alt{
  display:flex;gap:.7rem;align-items:flex-start;text-align:left;width:100%;
  background:var(--surface);border:1px solid var(--line);border-radius:3px;
  padding:.6rem .75rem;font-family:var(--body);font-size:.96rem;color:var(--ink);
  cursor:pointer;transition:border-color .1s,background .1s;
}
.alt:hover:not(:disabled){border-color:var(--accent);background:var(--accent-wash)}
.alt .letra{
  flex:none;width:22px;height:22px;display:grid;place-items:center;border-radius:2px;
  background:var(--surface-2);color:var(--ink-3);
  font-family:var(--mono);font-size:.72rem;font-weight:600;margin-top:.1rem;
}
.alt.sel{border-color:var(--accent);background:var(--accent-wash)}
.alt.sel .letra{background:var(--accent);color:var(--accent-ink)}
.alt.certa{border-color:var(--ok);background:var(--ok-wash)}
.alt.certa .letra{background:var(--ok);color:#fff}
.alt.errada{border-color:var(--bad);background:var(--bad-wash)}
.alt.errada .letra{background:var(--bad);color:#fff}
.alt:disabled{cursor:default;opacity:1}

.feedback{margin-top:1rem;padding:.85rem 1rem;border-left:3px solid var(--line-strong);background:var(--surface-2)}
.feedback .fh{
  font-family:var(--mono);font-size:.72rem;font-weight:600;text-transform:uppercase;
  letter-spacing:.09em;margin-bottom:.5rem;
}
.feedback.ok{border-left-color:var(--ok);background:var(--ok-wash)}
.feedback.ok .fh{color:var(--ok)}
.feedback.bad{border-left-color:var(--bad);background:var(--bad-wash)}
.feedback.bad .fh{color:var(--bad)}
.feedback p{margin:.4rem 0;font-size:.94rem;max-width:70ch}
.gabarito{
  display:flex;flex-direction:column;gap:.1rem;
  margin:.2rem 0 .8rem;border-top:1px solid var(--line);padding-top:.6rem;
}
.g-linha{
  display:grid;grid-template-columns:1.6rem minmax(0,1fr) 1.2rem;
  gap:.55rem;align-items:baseline;
  padding:.32rem .4rem;border-radius:4px;font-size:.9rem;color:var(--ink-2);
}
.g-linha + .g-linha{border-top:1px dotted var(--line)}
.g-letra{
  font-family:var(--mono);font-weight:600;font-size:.8rem;
  color:var(--ink-3);text-align:center;
}
.g-marca{font-weight:700;text-align:center}
.g-linha.g-certa{background:var(--ok-wash);color:var(--ink);font-weight:600}
.g-linha.g-certa .g-letra,.g-linha.g-certa .g-marca{color:var(--ok)}
.g-linha.g-errada{background:var(--bad-wash)}
.g-linha.g-errada .g-letra,.g-linha.g-errada .g-marca{color:var(--bad)}
.g-resumo{
  margin-top:.5rem;padding-top:.5rem;border-top:1px solid var(--line);
  font-family:var(--mono);font-size:.8rem;color:var(--ink-2);
}
.feedback .calc{
  font-size:.82rem;line-height:1.6;
  background:var(--surface);border:1px solid var(--line);
  padding:.6rem .8rem;margin:.55rem 0;overflow-x:auto;
  display:flex;flex-direction:column;gap:.16rem;
}
.calc .cl{
  display:flex;flex-wrap:wrap;align-items:baseline;
  gap:.15rem 1.4rem;justify-content:space-between;
}
.calc .cm{font-family:var(--mono);white-space:pre-wrap}
.calc .cn{font-family:var(--mono);color:var(--ink-3);white-space:pre-wrap}
.calc .cl-gap{height:.45rem}
.fbslot > .btn{margin-top:.9rem}

/* ===== resultado ===== */
.resulthead{text-align:center;padding:1.8rem 1rem}
.resultscore{
  font-family:var(--mono);font-size:3.1rem;font-weight:600;color:var(--ink);
  line-height:1;font-variant-numeric:tabular-nums;
}
.verdict{
  display:inline-block;margin-top:.8rem;padding:.35rem .85rem;border-radius:3px;
  font-family:var(--mono);font-size:.76rem;font-weight:600;
  text-transform:uppercase;letter-spacing:.07em;
}
.verdict.pass{background:var(--ok-wash);color:var(--ok)}
.verdict.fail{background:var(--bad-wash);color:var(--bad)}
table.res{width:100%;border-collapse:collapse;font-size:.9rem;margin-top:.5rem}
table.res th,table.res td{padding:.45rem .5rem;border-bottom:1px solid var(--line);text-align:left}
table.res th{
  font-family:var(--mono);color:var(--ink-3);font-weight:500;font-size:.68rem;
  text-transform:uppercase;letter-spacing:.09em;
}
table.res td.num{text-align:right;font-family:var(--mono);font-variant-numeric:tabular-nums}
.tablewrap{overflow-x:auto}

/* ===== sub-abas e resumo ===== */
.subnav{display:flex;gap:.3rem;flex-wrap:wrap;margin:.9rem 0 1.1rem;border-bottom:1px solid var(--line)}
.subnav button{
  background:none;border:0;border-bottom:2px solid transparent;
  padding:.5rem .8rem;cursor:pointer;color:var(--ink-3);
  font-family:var(--mono);font-size:.74rem;font-weight:500;
  text-transform:uppercase;letter-spacing:.07em;
}
.subnav button:hover{color:var(--ink)}
.subnav button.active{color:var(--ink);border-bottom-color:var(--accent)}

.r-sintese{color:var(--ink-2);max-width:74ch;margin:0 0 1rem}
.r-rotulo{
  font-family:var(--mono);font-size:.66rem;text-transform:uppercase;
  letter-spacing:.12em;color:var(--ink-3);
  margin:1.1rem 0 .5rem;padding-bottom:.3rem;border-bottom:1px solid var(--line);
}
.r-chaves{margin:0;padding-left:1.1rem}
.r-chaves li{margin:.35rem 0;font-size:.92rem;max-width:76ch}
.r-ex{
  border-left:2px solid var(--accent);background:var(--surface-2);
  padding:.7rem .9rem;margin:.6rem 0;border-radius:0 4px 4px 0;
}
.r-ex-t{font-family:var(--display);font-weight:600;font-size:.92rem;margin-bottom:.3rem}
.r-ex-q{font-size:.9rem;color:var(--ink-2);margin-bottom:.5rem;max-width:74ch}
.r-ex-s{
  font-family:var(--mono);font-size:.84rem;line-height:1.6;white-space:pre-wrap;
  background:var(--surface);border:1px solid var(--line);border-radius:4px;
  padding:.55rem .7rem;overflow-x:auto;
}

/* ===== acordeões ===== */
.fsec{margin-bottom:.4rem}
.fsec summary{
  cursor:pointer;padding:.7rem .9rem;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r);
  font-family:var(--display);font-weight:600;font-size:.95rem;list-style:none;
}
.fsec summary::-webkit-details-marker{display:none}
.fsec summary::before{content:"+";color:var(--accent);font-family:var(--mono);margin-right:.5rem}
.fsec[open] summary::before{content:"−"}
.fsec[open] summary{border-radius:var(--r) var(--r) 0 0;border-bottom:0}
.fsec .fbody{
  border:1px solid var(--line);border-top:0;border-radius:0 0 var(--r) var(--r);
  background:var(--surface);padding:.9rem 1.05rem;
}
.fsec .fbody p{max-width:74ch}
.fitem{padding:.5rem 0;border-bottom:1px solid var(--line)}
.fitem:last-child{border-bottom:0}
.fitem .fname{font-size:.85rem;color:var(--ink-2)}
.fitem .fform{
  margin-top:.3rem;display:flex;flex-direction:column;gap:.22rem;overflow-x:auto;
}
.fform .fl{
  font-family:var(--mono);font-size:.92rem;color:var(--ink);
  line-height:1.5;white-space:pre-wrap;
}
.fform .fl + .fl{
  padding-left:.75rem;border-left:2px solid var(--line);
  color:var(--ink-2);font-size:.88rem;
}
.fform .fn{color:var(--ink-3);font-size:.85em;margin-left:.6rem;white-space:pre-wrap}
.fitem .fobs{font-size:.79rem;color:var(--ink-3);margin-top:.25rem;max-width:74ch}

/* legenda das variáveis de cada fórmula */
.fvars{
  list-style:none;margin:.4rem 0 0;padding:0;
  display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));
  gap:.1rem .9rem;
}
.fvars li{
  font-size:.78rem;color:var(--ink-2);line-height:1.45;
  padding-left:.7rem;position:relative;
}
.fvars li::before{
  content:"";position:absolute;left:0;top:.55em;
  width:3px;height:3px;border-radius:50%;background:var(--line-strong);
}

/* cabeçalho que só aparece no papel */
.print-cabecalho{display:none}

.foot{
  max-width:1020px;margin:2.5rem auto 3rem;padding:1rem clamp(1.1rem,3vw,2.2rem);
  border-top:1px solid var(--line);color:var(--ink-3);font-size:.78rem;
}
.foot p{max-width:78ch}

.empty{text-align:center;padding:2.6rem 1rem;color:var(--ink-3)}


/* ============================================================
   IMPRESSÃO — sai apenas o formulário, em preto sobre branco
   ============================================================ */
@media print{
  @page{ margin:14mm 12mm; }

  .topbar,.foot,.naoimprimir,.subnav,.mainnav,.icon{display:none !important}
  .view{display:none !important}
  #view-formulario{display:block !important}
  main{max-width:none;margin:0;padding:0}

  body{background:#fff;color:#000;font-size:9.5pt;-webkit-print-color-adjust:exact}

  .print-cabecalho{
    display:block;border-bottom:1.5pt solid #000;
    padding-bottom:3mm;margin-bottom:5mm;
  }
  .print-cabecalho strong{display:block;font-family:var(--display);font-size:13pt}
  .print-cabecalho span{display:block;font-size:8pt;color:#444;margin-top:1mm}

  .fsec{margin:0 0 3mm;break-inside:avoid}
  .fsec summary{
    background:none;border:0;border-bottom:1pt solid #000;border-radius:0;
    padding:1.5mm 0;font-size:11.5pt;margin-top:4mm;break-after:avoid;
  }
  .fsec summary::before{content:""}
  .fsec summary .muted{display:none}
  .fsec .fbody{border:0;padding:2mm 0 0;background:none}

  .fitem{
    break-inside:avoid;padding:1.6mm 0;
    border-bottom:0.3pt dotted #aaa;
  }
  .fitem .fname{font-size:8.5pt;color:#333;font-weight:600}
  .fform{margin-top:1mm}
  .fform .fl{font-size:9.5pt;color:#000}
  .fform .fl + .fl{border-left:1pt solid #bbb;color:#222;font-size:9pt}
  .fform .fn{color:#555}
  .fvars{grid-template-columns:repeat(auto-fill,minmax(58mm,1fr));gap:0 4mm;margin-top:1mm}
  .fvars li{font-size:7.5pt;color:#333}
  .fvars li::before{background:#999}
  .fitem .fobs{font-size:7.5pt;color:#444}
}

/* ============================================================
   PAINEL DO RESUMO DETALHADO DO ASSUNTO
   ============================================================ */
.vp{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;padding:1rem}
.vp.hidden{display:none}
.vp-fundo{position:absolute;inset:0;background:rgba(10,13,18,.55);backdrop-filter:blur(2px)}
.vp-caixa{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r);box-shadow:0 12px 48px rgba(0,0,0,.35);
  width:min(760px,100%);max-height:88vh;display:flex;flex-direction:column;
}
.vp-topo{
  display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;
  padding:1rem 1.2rem .8rem;border-bottom:1px solid var(--line);
}
.vp-eyebrow{
  display:block;font-family:var(--mono);font-size:.66rem;color:var(--ink-3);
  text-transform:uppercase;letter-spacing:.12em;margin-bottom:.3rem;
}
.vp-topo h2{
  font-family:var(--display);font-size:1.15rem;font-weight:600;
  text-transform:none;letter-spacing:-.01em;color:var(--ink);margin:0;
}
.vp-corpo{padding:1rem 1.2rem;overflow-y:auto}
.vp-resumo{color:var(--ink-2);max-width:70ch;margin:0}
.vp-rotulo{
  font-family:var(--mono);font-size:.66rem;text-transform:uppercase;letter-spacing:.12em;
  color:var(--ink-3);margin:1.3rem 0 .55rem;padding-bottom:.3rem;border-bottom:1px solid var(--line);
}
.vp-lista{margin:0;padding-left:1.1rem}
.vp-lista li{margin:.4rem 0;font-size:.93rem;max-width:72ch;line-height:1.6}
.vp-arm li{color:var(--ink-2)}
.vp-arm li::marker{color:var(--bad)}
.vp-formulas{display:flex;flex-direction:column;gap:.25rem}
.vp-f{
  font-family:var(--mono);font-size:.9rem;white-space:pre-wrap;
  background:var(--surface-2);border-left:2px solid var(--accent);
  padding:.4rem .7rem;border-radius:0 3px 3px 0;
}
.vp-rodape{
  display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;
  padding:.7rem 1.2rem;border-top:1px solid var(--line);background:var(--surface-2);
  border-radius:0 0 var(--r) var(--r);
}
@media(max-width:600px){
  /* No celular o painel vira folha inferior em vez de ocupar a tela inteira.
     Ocupando tudo, o ✕ do cabeçalho encostava na barra de URL e caía embaixo
     do botão flutuante do canto superior direito. Ancorado embaixo, sobra
     sempre uma faixa livre no topo e o ✕ fica longe dos dois. */
  .vp{padding:0;align-items:flex-end}
  .vp-caixa{
    width:100%;height:auto;
    max-height:86vh;
    max-height:86dvh;            /* dvh desconta a barra do navegador */
    border-radius:var(--r) var(--r) 0 0;border-bottom:0;
  }
  /* alça, para a folha se ler como painel que sobe */
  .vp-topo{padding-top:1.1rem;position:relative}
  .vp-topo::before{
    content:"";position:absolute;top:.45rem;left:50%;transform:translateX(-50%);
    width:36px;height:4px;border-radius:2px;background:var(--line-strong);
  }
  /* alvo de toque confortável: 44 px é o mínimo recomendado */
  #vpFechar{
    min-width:44px;min-height:44px;font-size:1.05rem;
    display:flex;align-items:center;justify-content:center;
  }
  .vp-rodape{padding-bottom:calc(.7rem + env(safe-area-inset-bottom))}
}
/* enquanto o resumo está aberto, o botão fixo do canto sai da frente:
   ele tem z-index altíssimo e passaria por cima do painel */
body.com-modal #mr-portfolio-btn{display:none !important}
@media print{ .vp{display:none !important} }
/* ============================================================
   CALCULADORA DE APOIO
   Painel flutuante, não modal: continua-se lendo o enunciado
   enquanto se faz a conta.
   ============================================================ */
.calc-fab{
  position:fixed;right:1.25rem;bottom:1.25rem;z-index:150;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;
  width:56px;height:56px;padding:0;cursor:pointer;
  background:var(--surface);color:var(--ink);
  border:1px solid var(--line-strong);border-radius:var(--r);
  box-shadow:0 4px 14px rgba(20,24,33,.16);
  transition:transform .12s ease, border-color .12s ease;
}
.calc-fab span{font-family:var(--mono);font-size:1.05rem;font-weight:600;line-height:1}
.calc-fab small{
  font-family:var(--mono);font-size:.56rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--ink-3);line-height:1;
}
.calc-fab:hover{transform:translateY(-1px);border-color:var(--accent)}
.calc-fab.ativo{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.calc-fab.ativo small{color:var(--accent-ink);opacity:.75}
.calc-fab.off{display:none}

.calcp{
  position:fixed;z-index:160;width:300px;
  background:var(--surface);border:1px solid var(--line-strong);
  border-radius:var(--r);box-shadow:0 10px 40px rgba(20,24,33,.28);
  display:flex;flex-direction:column;overflow:hidden;
}
.calcp.hidden{display:none}
.calcp.arrastando{user-select:none;box-shadow:0 16px 50px rgba(20,24,33,.36)}

.calc-topo{
  display:flex;align-items:center;justify-content:space-between;gap:.5rem;
  padding:.45rem .4rem .45rem .7rem;cursor:move;
  background:var(--surface-2);border-bottom:1px solid var(--line);
}
.calc-nome{
  font-family:var(--mono);font-size:.66rem;text-transform:uppercase;
  letter-spacing:.12em;color:var(--ink-3);
}
.calc-topo-acoes{display:flex;align-items:center;gap:.25rem}
.calc-modo{
  font-family:var(--mono);font-size:.62rem;font-weight:600;letter-spacing:.08em;
  padding:.2rem .4rem;cursor:pointer;color:var(--accent);
  background:var(--accent-wash);border:1px solid var(--line);border-radius:3px;
}
.calc-x{
  background:none;border:0;cursor:pointer;color:var(--ink-3);
  font-size:.9rem;line-height:1;padding:.2rem .35rem;border-radius:3px;
}
.calc-x:hover{color:var(--bad);background:var(--bad-wash)}

.calc-visor{padding:.55rem .7rem .5rem;border-bottom:1px solid var(--line)}
.calc-entrada{
  width:100%;box-sizing:border-box;padding:.3rem 0;
  font-family:var(--mono);font-size:1rem;color:var(--ink);
  background:none;border:0;border-bottom:1px solid var(--line);outline:none;
}
.calc-entrada:focus{border-bottom-color:var(--accent)}
.calc-entrada::placeholder{color:var(--ink-3);font-size:.78rem}
.calc-saida{
  min-height:1.45rem;margin-top:.3rem;text-align:right;
  font-family:var(--mono);font-size:1.05rem;font-weight:600;color:var(--ink-2);
  overflow-x:auto;white-space:nowrap;
}
.calc-saida.ok{color:var(--accent)}
.calc-saida.erro{font-size:.74rem;font-weight:400;color:var(--bad);white-space:normal}

.calc-teclado{
  display:grid;grid-template-columns:repeat(6,1fr);gap:3px;padding:.5rem;
}
.calc-t{
  padding:.5rem 0;cursor:pointer;
  font-family:var(--mono);font-size:.86rem;color:var(--ink);
  background:var(--surface-2);border:1px solid transparent;border-radius:3px;
  transition:background .1s ease;
}
.calc-t:hover{background:var(--line);border-color:var(--line-strong)}
.calc-t:active{transform:translateY(1px)}
.calc-t.fn{font-size:.72rem;color:var(--ink-2);background:transparent;border-color:var(--line)}
.calc-t.num{font-weight:600}
.calc-t.op{color:var(--accent);font-weight:600}
.calc-t.lim{color:var(--bad)}
.calc-t.igual{
  background:var(--accent);color:var(--accent-ink);font-weight:600;
  display:flex;align-items:center;justify-content:center;
}
.calc-t.igual:hover{background:var(--accent);filter:brightness(1.08)}

.calc-hist{
  max-height:104px;overflow-y:auto;padding:0 .5rem .4rem;
  border-top:1px solid var(--line);
}
.calc-h{
  display:flex;justify-content:space-between;align-items:baseline;gap:.6rem;
  width:100%;padding:.28rem .2rem;cursor:pointer;text-align:left;
  background:none;border:0;border-bottom:1px dotted var(--line);
}
.calc-h:hover{background:var(--surface-2)}
.calc-h-e{
  font-family:var(--mono);font-size:.7rem;color:var(--ink-3);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.calc-h-r{font-family:var(--mono);font-size:.78rem;font-weight:600;color:var(--ink);flex:none}
.calc-vazio{
  padding:.5rem .2rem;font-size:.7rem;color:var(--ink-3);text-align:center;
}
.calc-pe{
  padding:.4rem .7rem;font-size:.64rem;color:var(--ink-3);
  background:var(--surface-2);border-top:1px solid var(--line);
}
.calc-pe b{color:var(--ink-2);font-weight:600}

@media(max-width:600px){
  .calc-fab{right:.8rem;bottom:.8rem;width:48px;height:48px}
  .calcp{
    left:0 !important;right:0;top:auto !important;bottom:0;
    width:100%;border-radius:var(--r) var(--r) 0 0;border-bottom:0;
  }
  .calc-topo{cursor:default}
  .calc-hist{max-height:72px}
}
@media print{ .calcp, .calc-fab{display:none !important} }

/* calculadora encaixada na própria questão: sai do position:fixed e
   entra no fluxo, logo abaixo das alternativas */
.calcp.inline{
  position:static;width:100%;max-width:340px;
  margin:.9rem 0 .2rem;box-shadow:none;
  border-color:var(--line);
}
.calcp.inline .calc-topo{cursor:default}
.calcp.inline .calc-nome::after{
  content:" · nesta questão";letter-spacing:.06em;color:var(--ink-3);opacity:.7;
}

/* ============================================================
   FIGURAS DAS QUESTÕES E DOS RESUMOS
   Desenhos vetoriais embutidos. Herdam a cor do texto, então
   acompanham o tema; na impressão saem em preto sobre branco.
   ============================================================ */
.qfig{
  margin:.9rem 0;padding:.8rem .6rem .5rem;
  background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r);
}
.qfig svg{display:block;width:100%;max-width:400px;height:auto;margin:0 auto;color:var(--ink)}
.qfig-leg{
  margin:.5rem 0 0;font-family:var(--mono);font-size:.66rem;
  color:var(--ink-3);text-align:center;letter-spacing:.02em;
}
/* traços da figura */
.qfig .f-g{fill:none;stroke:currentColor;stroke-width:2.4;stroke-linecap:round}
.qfig .f-l{fill:none;stroke:currentColor;stroke-width:1.1}
.qfig .f-l2{fill:none;stroke:var(--ink-3);stroke-width:1.4}
.qfig .f-c{fill:none;stroke:var(--accent);stroke-width:1.8}
.qfig .f-d{fill:none;stroke:var(--ink-3);stroke-width:.8;stroke-dasharray:4 3}
.qfig .f-p{fill:currentColor;stroke:none}
.qfig .f-pl{fill:currentColor;stroke:none}
.qfig .f-pc{fill:var(--accent);stroke:none}
.qfig .f-p2{fill:var(--ink-3);stroke:none}
.qfig .f-hatch{fill:var(--accent);opacity:.14;stroke:none}
/* rótulos */
.qfig text{font-family:var(--mono);paint-order:stroke}
.qfig .f-t{fill:currentColor;font-size:12px}
.qfig .f-t2{fill:var(--ink-2);font-size:10px}
.qfig .f-t3{fill:var(--ink-3);font-size:9px}
.qfig .f-ta{fill:var(--accent);font-size:11px}
/* dentro do painel de resumo do assunto */
.vp-corpo .qfig{margin:.6rem 0 0}
@media print{
  .qfig{background:none;border-color:#999;break-inside:avoid}
  .qfig svg{color:#000}
}

/* legenda das variáveis nas fórmulas do resumo do assunto */
.vp-vars{
  display:grid;grid-template-columns:auto 1fr;gap:.18rem .7rem;
  margin:.55rem 0 0;padding:.55rem .7rem;
  background:var(--surface-2);border-left:2px solid var(--line-strong);border-radius:0 3px 3px 0;
}
.vp-vars dt{
  font-family:var(--mono);font-size:.8rem;font-weight:600;color:var(--accent);
  white-space:nowrap;text-align:right;
}
.vp-vars dd{margin:0;font-size:.8rem;color:var(--ink-2);line-height:1.45}
@media(max-width:520px){
  .vp-vars{grid-template-columns:1fr;gap:0}
  .vp-vars dt{text-align:left;margin-top:.4rem}
}