:root{
  --bg:#f4f2ff; --card:#fff; --tx:#1d1b32; --mut:#6a6783; --bd:#e3e0f5;
  --pri:#5b3df5; --pri2:#8a5cff; --pri-tx:#fff;
  --ok:#14a06b; --ok-bg:#e4f8ee; --err:#e0445a; --err-bg:#fdebee;
  --xp:#f5a524; --fogo:#ff6a3d; --neutro-bg:#eeedf8;
  --sombra:0 6px 24px rgba(60,40,160,.10); --r:16px;
}
:root[data-tema="dark"]{
  --bg:#12111d; --card:#1c1a2c; --tx:#ecebf7; --mut:#a09db9; --bd:#2e2b45;
  --pri:#8064ff; --pri2:#a983ff; --ok:#3ccf91; --ok-bg:#12332a; --err:#ff6b80; --err-bg:#3a1a22;
  --neutro-bg:#26233b; --sombra:0 6px 24px rgba(0,0,0,.35);
}
@media (prefers-color-scheme:dark){
  :root:not([data-tema="light"]){
    --bg:#12111d; --card:#1c1a2c; --tx:#ecebf7; --mut:#a09db9; --bd:#2e2b45;
    --pri:#8064ff; --pri2:#a983ff; --ok:#3ccf91; --ok-bg:#12332a; --err:#ff6b80; --err-bg:#3a1a22;
    --neutro-bg:#26233b; --sombra:0 6px 24px rgba(0,0,0,.35);
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--tx);font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  min-height:100vh;display:flex;flex-direction:column;padding-bottom:env(safe-area-inset-bottom)}
button{font:inherit;color:inherit;cursor:pointer}
button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid var(--pri2);outline-offset:2px}
h1{font-size:clamp(1.5rem,4.5vw,2rem);line-height:1.2;margin:.2em 0 .3em}
h2{font-size:1.15rem;margin:1.4em 0 .5em}
h3{font-size:1rem;margin:.9em 0 .3em}
p{margin:.4em 0}
a{color:var(--pri)}
.sub{color:var(--mut)}
small{display:block;color:var(--mut)}

/* topo e menus */
.topo{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:12px;padding:10px max(16px,env(safe-area-inset-left));
  background:linear-gradient(90deg,var(--pri),var(--pri2));color:#fff;box-shadow:0 2px 12px rgba(40,20,120,.25)}
.logo{background:none;border:0;color:#fff;font-weight:800;font-size:1.1rem;padding:6px 4px;white-space:nowrap}
.logo-ico{display:inline-block;transform:rotate(-8deg)}
.menu{display:flex;gap:2px;margin-left:8px;flex:1}
.menu button{background:none;border:0;color:#ffffffd9;padding:8px 12px;border-radius:999px;font-weight:600}
.menu button:hover,.menu button.ativo{background:#ffffff26;color:#fff}
.topo-dir{display:flex;align-items:center;gap:8px;margin-left:auto}
.chip{background:#ffffff26;border-radius:999px;padding:4px 10px;font-weight:700;white-space:nowrap}
.icone{background:#ffffff26;border:0;border-radius:50%;width:38px;height:38px}
body.deslogado .menu,body.deslogado .abas{display:none}
.abas{display:none}
@media (max-width:760px){
  .menu{display:none}
  .topo{padding-block:8px}
  .abas{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;bottom:0;left:0;right:0;z-index:20;background:var(--card);
    border-top:1px solid var(--bd);padding:4px 4px calc(4px + env(safe-area-inset-bottom))}
  .abas button{background:none;border:0;display:flex;flex-direction:column;align-items:center;gap:0;font-size:.72rem;padding:6px 0;color:var(--mut);min-height:48px}
  .abas button i{font-style:normal;font-size:1.25rem;line-height:1.2}
  .abas button.ativo{color:var(--pri);font-weight:700}
  body:not(.deslogado) main{padding-bottom:84px}
  body:not(.deslogado) .rodape{padding-bottom:84px}
}
.aviso{background:#fff3cd;color:#5c4400;padding:8px 16px;text-align:center;font-size:.9rem}

main{width:100%;max-width:880px;margin:0 auto;padding:18px max(16px,env(safe-area-inset-left)) 32px;flex:1}
.rodape{display:flex;flex-wrap:wrap;gap:6px 18px;justify-content:center;text-align:center;color:var(--mut);font-size:.82rem;padding:14px 16px 22px}

/* cartões, botões e formulários */
.card{background:var(--card);border:1px solid var(--bd);border-radius:var(--r);padding:16px;box-shadow:var(--sombra);margin:12px 0}
.linha{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.btn{background:linear-gradient(135deg,var(--pri),var(--pri2));color:var(--pri-tx);border:0;border-radius:12px;padding:12px 20px;font-weight:700;min-height:46px;
  box-shadow:0 4px 14px rgba(91,61,245,.3);transition:transform .08s}
.btn:active{transform:scale(.97)}
.btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}
.btn.sec{background:var(--card);color:var(--pri);border:2px solid var(--pri);box-shadow:none}
.btn.mini{padding:6px 12px;min-height:34px;font-size:.88rem}
.topo .btn.sec{background:transparent;color:#fff;border-color:#ffffff88}
.btn.largo{width:100%}
.link{background:none;border:0;padding:0;color:var(--pri);text-decoration:underline;font-size:inherit}
label{display:block;font-weight:600;margin:12px 0 4px}
input[type=text],input[type=tel],input[type=password],input[type=date],select{width:100%;font:inherit;color:var(--tx);background:var(--bg);
  border:2px solid var(--bd);border-radius:12px;padding:12px 14px;min-height:46px}
input:focus,select:focus{border-color:var(--pri)}
.dica-campo{color:var(--mut);font-size:.85rem;margin:3px 0 0}
.erro-form{background:var(--err-bg);color:var(--err);border-radius:10px;padding:10px 12px;margin:12px 0;font-weight:600}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:400;margin:14px 0}
.check input{margin-top:4px;width:20px;height:20px;flex:none;accent-color:var(--pri)}
.abas-form{display:grid;grid-template-columns:1fr 1fr;background:var(--bg);border-radius:12px;padding:4px;margin-bottom:8px}
.abas-form button{border:0;background:none;border-radius:9px;padding:10px;font-weight:700;color:var(--mut)}
.abas-form button.ativo{background:var(--card);color:var(--pri);box-shadow:var(--sombra)}
.entrada{max-width:460px;margin:0 auto}
.heroi{text-align:center;padding:10px 0 4px}
.heroi .emoji{font-size:3rem}

/* início / painel */
.saudacao{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}
.nivel{background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;border-radius:var(--r);padding:16px;margin:12px 0;box-shadow:var(--sombra)}
.nivel b{font-size:1.2rem}
.nivel .xpbar{background:#ffffff40;border-radius:99px;height:12px;overflow:hidden;margin:8px 0 4px}
.nivel .xpbar i{display:block;height:100%;background:var(--xp);border-radius:99px;transition:width .6s}
.nivel small{color:#ffffffd0}
.painel{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:12px 0}
.painel .card{margin:0;text-align:center;padding:14px 10px}
.painel .card b{display:block;font-size:1.7rem;line-height:1.1}
.painel .card span{color:var(--mut);font-size:.85rem}
.anel{--p:0;width:76px;height:76px;border-radius:50%;margin:0 auto 4px;display:grid;place-items:center;
  background:conic-gradient(var(--ok) calc(var(--p)*1%),var(--bd) 0)}
.anel i{font-style:normal;background:var(--card);width:58px;height:58px;border-radius:50%;display:grid;place-items:center;font-weight:800}
.fogo{color:var(--fogo)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;margin:12px 0}
.acao{text-align:left;background:var(--card);border:1px solid var(--bd);border-radius:var(--r);padding:16px;box-shadow:var(--sombra);
  display:flex;flex-direction:column;gap:4px;transition:transform .12s}
.acao:hover:not(:disabled){transform:translateY(-2px);border-color:var(--pri)}
.acao:disabled{opacity:.5;cursor:not-allowed}
.acao b{font-size:1.05rem}
.acao span{color:var(--mut);font-size:.9rem}
.materia{display:grid;grid-template-columns:110px 1fr 48px;gap:8px;align-items:center;margin:6px 0;font-size:.92rem}
.materia .trilho{background:var(--bd);border-radius:99px;height:10px;overflow:hidden}
.materia .trilho i{display:block;height:100%;background:var(--ok);border-radius:99px}
.materia .trilho i.fraca{background:var(--err)}
.materia .trilho i.media{background:var(--xp)}
.medalhas{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px}
.medalha{background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:12px 8px;text-align:center;font-size:.82rem}
.medalha i{display:block;font-style:normal;font-size:2rem}
.medalha.off{filter:grayscale(1);opacity:.4}
.medalha small{font-size:.74rem}

/* provas */
.exame{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;background:var(--card);border:1px solid var(--bd);
  border-radius:var(--r);padding:14px;margin:8px 0;box-shadow:var(--sombra)}
.exame>div:first-child{flex:1 1 220px}
.tag{display:inline-block;background:var(--neutro-bg);color:var(--mut);border-radius:99px;padding:2px 10px;font-size:.78rem;font-weight:600}
.tag.ok{background:var(--ok-bg);color:var(--ok)}
.hist{display:grid;grid-template-columns:1fr auto;gap:2px 12px;padding:10px 0;border-bottom:1px solid var(--bd)}
.hist b.nota-h{font-size:1.2rem;align-self:center;grid-row:span 2}

/* questões */
.barra{background:var(--bd);height:8px;border-radius:99px;overflow:hidden;margin:2px 0 12px}
.barra i{display:block;height:100%;background:linear-gradient(90deg,var(--pri),var(--pri2));transition:width .3s}
.meta{display:flex;flex-wrap:wrap;gap:6px 10px;align-items:center;justify-content:space-between;color:var(--mut);font-size:.88rem;margin-bottom:8px}
.apoio-tit{font-weight:700;margin:10px 0 4px}
.img-q{display:block;width:100%;height:auto;background:#fff;border:1px solid var(--bd);border-radius:12px;margin:8px 0}
.alts{display:grid;gap:10px;margin:14px 0}
.alt{background:var(--card);border:2px solid var(--bd);border-radius:14px;min-height:56px;font-size:1.25rem;font-weight:800;transition:transform .08s}
.alt:hover:not(:disabled){border-color:var(--pri)}
.alt:active:not(:disabled){transform:scale(.95)}
.alt.sel{border-color:var(--pri);background:var(--neutro-bg);color:var(--pri)}
.alt.certa{background:var(--ok);border-color:var(--ok);color:#fff}
.alt.errada{background:var(--err);border-color:var(--err);color:#fff}
.alt:disabled{cursor:default}
.resultado{border-radius:14px;padding:14px;font-weight:700;margin:10px 0;animation:pop .35s}
.resultado.ok{background:var(--ok-bg);color:var(--ok)}
.resultado.erro{background:var(--err-bg);color:var(--err)}
.resultado.neutro{background:var(--neutro-bg);color:var(--mut)}
.resultado small{color:inherit;font-weight:600;opacity:.85}
@keyframes pop{from{transform:scale(.92);opacity:0}to{transform:none;opacity:1}}
.expl{background:var(--card);border:1px solid var(--bd);border-left:5px solid var(--pri);border-radius:var(--r);padding:14px 16px;margin:12px 0}
.expl ol{padding-left:1.3em}
.expl details{margin:8px 0}
.expl summary{cursor:pointer;font-weight:700;color:var(--pri);padding:6px 0}
.dica{background:#fff8e1;color:#5c4400;border-radius:12px;padding:10px 12px;margin-top:12px}
:root[data-tema="dark"] .dica{background:#3a3112;color:#ffe7a0}
@media (prefers-color-scheme:dark){:root:not([data-tema="light"]) .dica{background:#3a3112;color:#ffe7a0}}
.sem-expl{background:var(--neutro-bg);color:var(--mut);border-radius:12px;padding:12px;margin:12px 0}
.nota{font-size:3rem;font-weight:900;margin:0;color:var(--pri)}
.bolinhas{display:flex;flex-wrap:wrap;gap:8px}
.bola{width:42px;height:42px;border-radius:50%;border:0;font-weight:700;background:var(--neutro-bg)}
.bola.ok{background:var(--ok);color:#fff}
.bola.erro{background:var(--err);color:#fff}
.confete{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:50}
.confete i{position:absolute;top:-20px;width:10px;height:14px;animation:cai 2.4s linear forwards}
@keyframes cai{to{transform:translateY(110vh) rotate(720deg)}}
.texto-longo{max-width:68ch}
.texto-longo p{margin:.8em 0}
.autor{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.avatar{width:112px;height:112px;border-radius:50%;object-fit:cover;object-position:center 30%;border:4px solid var(--pri);box-shadow:var(--sombra);flex:none}
@media (max-width:480px){
  .materia{grid-template-columns:84px 1fr 42px;font-size:.85rem}
  .btn{flex:1 1 auto}
  .alts{gap:8px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* destaque do botão "Sobre o autor" */
.menu button.destaque{background:#ffffff2e;color:#fff;box-shadow:inset 0 0 0 1.5px #ffffff80}
.menu button.destaque:hover,.menu button.destaque.ativo{background:#fff;color:var(--pri)}
.abas button.destaque i{background:linear-gradient(135deg,var(--pri),var(--pri2));border-radius:50%;width:30px;height:30px;display:grid;place-items:center;font-size:1rem;margin-bottom:1px}
.abas button.destaque{color:var(--pri);font-weight:700}