/* Guia de Técnicas de Programação — visual no estilo do guia de Compiladores:
   topo fixo, trilho lateral, cartões brancos sobre fundo cinza-claro, verde
   como cor principal e uma cor por papel no depurador. */
:root {
  color-scheme: light;
  --bg: #f4f6f8; --card: #fff; --sunk: #fafcfc; --sunk2: #eef3f2;
  --ink: #182d32; --ink-2: #53666d; --ink-3: #819096;
  --rule: #dce3e6; --rule-2: #c9d5d6;
  --green: #14674c; --green-d: #10533d; --mint: #d7f4e5; --mint-2: #deeee7; --mint-l: #edf8f2;
  --dark: #112c2a; --code: #13272e; --code-h: #1e343c; --code-t: #e3edf0;
  --azul: #215c7a; --azul-bg: #e2edf3;
  --laranja: #bd711d; --laranja-bg: #fdf1e0;
  --vermelho: #c0392b; --vermelho-bg: #fbeae5;
  --roxo: #6b4fa0; --roxo-bg: #efe9f8;
  --f: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --m: ui-monospace, "Cascadia Code", SFMono-Regular, Consolas, monospace;
  --sh: 0 1px 2px #102a2a0d, 0 4px 14px #102a2a0a;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 var(--f); }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid #2474d8; outline-offset: 2px; }
a { color: var(--green); }
code, pre, kbd { font-family: var(--m); font-variant-ligatures: none; }
code.inl { font-size: .88em; background: #e8efed; padding: 1px 6px; border-radius: 4px; color: #1d4a41; }
[hidden] { display: none !important; }

/* ---------- topo ---------- */
.topbar { height: 72px; background: #fff; border-bottom: 1px solid var(--rule); display: flex; align-items: center; justify-content: space-between; padding: 0 26px; gap: 16px; position: sticky; top: 0; z-index: 40; }
.brand { font-size: 23px; font-weight: 750; letter-spacing: -.8px; display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-icon { display: grid; place-items: center; width: 36px; height: 36px; background: var(--dark); color: #97efbd; border-radius: 9px; font: 700 17px var(--m); }
.brand small { font-weight: 400; color: var(--ink-2); font-size: 14px; letter-spacing: 0; }
.profile { display: flex; align-items: center; gap: 9px; color: var(--green); font-weight: 700; font-size: 14px; }
.profile .av { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--mint); color: var(--green-d); }
.menu-btn { display: none; border: 1px solid var(--rule-2); background: #fff; border-radius: 7px; padding: 6px 10px; }
@media (max-width: 1040px) { .menu-btn { display: inline-block; } .profile span.nome { display: none; } }

/* ---------- layout ---------- */
.shell { display: grid; grid-template-columns: 262px minmax(0, 1fr); min-height: calc(100vh - 72px); }
.side { position: sticky; top: 72px; align-self: start; height: calc(100vh - 72px); overflow-y: auto; padding: 26px 16px 40px; border-right: 1px solid var(--rule); background: #fbfcfd; }
@media (max-width: 1040px) {
  .shell { grid-template-columns: 1fr; }
  .side { position: fixed; left: 0; top: 72px; width: 280px; z-index: 30; transform: translateX(-100%); transition: transform .2s ease; box-shadow: var(--sh); }
  body.menu-aberto .side { transform: none; }
}
.side-t { font-size: 11px; letter-spacing: 1.6px; font-weight: 700; color: var(--ink-2); text-transform: uppercase; margin: 0 10px 14px; }
.sn-grupo { margin-bottom: 14px; }
.sn-cab { font-size: 11px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--ink-3); font-weight: 700; padding: 0 10px 4px; }
.sn-link { display: flex; gap: 9px; align-items: baseline; padding: 6px 10px; border-radius: 7px; text-decoration: none; color: var(--ink-2); font-size: 14.5px; font-weight: 550; line-height: 1.35; }
.sn-link .n { font: 600 11px var(--m); color: var(--ink-3); min-width: 30px; }
.sn-link:hover { background: var(--sunk2); color: var(--ink); }
.sn-link.on { background: var(--mint-l); color: var(--green-d); font-weight: 700; box-shadow: inset 3px 0 0 var(--green); }
.sn-link.on .n { color: var(--green); }
.sn-sub { display: block; padding: 3px 10px 3px 49px; font-size: 13px; color: var(--ink-3); text-decoration: none; border-radius: 6px; }
.sn-sub:hover { color: var(--green); background: var(--sunk2); }

.wrap { min-width: 0; padding: 30px clamp(16px, 3vw, 44px) 80px; max-width: 1320px; }
.breadcrumb { font-size: 13px; color: var(--ink-3); margin-bottom: 10px; }
.breadcrumb a { color: var(--ink-3); text-decoration: none; }
.breadcrumb a:hover { color: var(--green); }
.eyebrow { font-size: 11px; font-weight: 750; letter-spacing: 1.8px; color: var(--green); text-transform: uppercase; }
.hero { margin-bottom: 26px; }
.hero h1 { font-size: clamp(2rem, 4.4vw, 3.1rem); line-height: 1.08; letter-spacing: -1.4px; margin: 8px 0 12px; font-weight: 780; }
.hero .lead { font-size: 18px; color: var(--ink-2); max-width: 760px; margin: 0; }
.custos { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.custo { display: flex; flex-direction: column; border: 1px solid var(--rule); background: #fff; border-radius: 9px; padding: 7px 13px; min-width: 110px; }
.custo span { font-size: 10.5px; letter-spacing: 1px; text-transform: uppercase; color: var(--ink-3); font-weight: 700; }
.custo b { font: 700 16px var(--m); color: var(--ink); }
.indice-pagina { display: flex; flex-wrap: wrap; gap: 6px; margin: 18px 0 0; }
.indice-pagina a { font-size: 13px; text-decoration: none; border: 1px solid var(--rule-2); border-radius: 999px; padding: 4px 11px; color: var(--ink-2); background: #fff; }
.indice-pagina a:hover { border-color: var(--green); color: var(--green); }

.sec { margin-top: 44px; scroll-margin-top: 90px; }
.sec > h2 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); letter-spacing: -.6px; margin: 6px 0 12px; }
.sec > .sub { color: var(--ink-2); margin: -4px 0 16px; max-width: 820px; }
h3 { font-size: 1.2rem; margin: 28px 0 10px; letter-spacing: -.3px; }
.prose { max-width: 860px; }
.prose p { margin: 0 0 12px; }
.prose ul, .prose ol { padding-left: 1.3em; margin: 0 0 12px; }
.prose li { margin-bottom: 4px; }
.card { background: var(--card); border: 1px solid var(--rule); border-radius: 12px; box-shadow: var(--sh); }
.grade2 { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }

/* ---------- código estático ---------- */
.code { background: var(--code); color: var(--code-t); border-radius: 10px; padding: 14px 18px; overflow-x: auto; font: 13.5px/1.75 var(--m); tab-size: 4; margin: 10px 0 16px; }
.code pre { margin: 0; }
.pseudo { background: #fff; border: 1px solid var(--rule); border-left: 4px solid var(--azul); color: var(--ink); }
.k { color: #8fd0f0; font-weight: 500; } .s { color: #97efbd; } .c { color: #96cab8; font-style: italic; } .n { color: #f0c07a; } .ty { color: #9fe0d0; }
.pseudo .kw { color: var(--azul); font-weight: 700; }
.diff-add { background: #1f4a37; display: block; margin: 0 -18px; padding: 0 18px; box-shadow: inset 3px 0 0 #5fd49a; }
.diff-rem { background: #4a2626; display: block; margin: 0 -18px; padding: 0 18px; box-shadow: inset 3px 0 0 #ff8a80; text-decoration: line-through; opacity: .75; }

.nota { border: 1px solid var(--rule); background: #fff; border-radius: 10px; padding: 12px 16px; margin: 14px 0; max-width: 860px; }
.nota.inv { border-color: #b8d4c7; background: var(--mint-l); }
.nota.alerta { border-color: #efd9a9; background: #fff8e8; }
.nota > b:first-child { display: block; margin-bottom: 4px; }

.btn { border: 1px solid #c9d5d6; border-radius: 7px; padding: 7px 13px; min-height: 38px; background: #fff; color: var(--ink); font-size: 14px; font-weight: 600; }
.btn:hover { background: #edf4f0; }
.btn.play { background: var(--green); border-color: var(--green); color: #fff; }
.btn.play:hover { background: var(--green-d); }
.btn.sei { background: var(--green); border-color: var(--green); color: #fff; }
.btn.revisar { border-color: #e6c4b8; color: #a04422; }
.btn:disabled { opacity: .45; cursor: default; }
.preset { border: 1px solid #c7d5d3; background: #fff; color: var(--green); border-radius: 999px; padding: 5px 12px; font-size: 13px; font-weight: 650; }
.preset:hover { border-color: var(--green); }
.preset[aria-pressed=true] { background: var(--green); border-color: var(--green); color: #fff; }

/* ============================================================ DEPURADOR */
.dp { background: #fff; border: 1px solid var(--rule); border-radius: 14px; box-shadow: var(--sh); overflow: hidden; margin: 14px 0 8px; }
.dp-topo { padding: 14px 18px 12px; border-bottom: 1px solid var(--rule); background: var(--sunk); display: flex; flex-direction: column; gap: 10px; }
.dp-progs { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.dp-progs .lb { font-size: 12px; font-weight: 650; color: var(--ink-2); margin-right: 4px; }
.dp-ent { display: flex; gap: 10px 16px; flex-wrap: wrap; align-items: flex-end; }
.dp-campo { display: flex; flex-direction: column; gap: 3px; }
.dp-campo label { font-size: 11.5px; font-weight: 700; color: var(--ink-2); letter-spacing: .3px; }
.dp-campo label code { font-size: 11px; color: var(--ink-3); font-weight: 500; }
.dp-campo input, .dp-campo textarea { border: 1px solid var(--rule-2); border-radius: 7px; padding: 6px 9px; font: 14px var(--m); background: #fff; min-width: 90px; }
.dp-campo textarea { resize: vertical; min-height: 60px; }
.dp-campo input.largo { min-width: 250px; }
.dp-ent .acoes { display: flex; gap: 8px; margin-left: auto; flex-wrap: wrap; }
.dp-dica { font-size: 12px; color: var(--ink-3); }
.dp-erro-comp { background: var(--vermelho-bg); color: #8a2a1e; border: 1px solid #efc3b6; border-radius: 8px; padding: 8px 12px; font: 13px var(--m); white-space: pre-wrap; }

.dp-editor { border-bottom: 1px solid var(--rule); padding: 14px 18px; background: #fff; display: flex; flex-direction: column; gap: 10px; }
.dp-editor .barra { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.dp-editor .barra .t { font-weight: 700; font-size: 14px; margin-right: auto; }

.dp-palco { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 14px; padding: 16px 18px; }
@media (max-width: 1000px) { .dp-palco { grid-template-columns: 1fr; } }
.dp-col { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.pn { border: 1px solid var(--rule); border-radius: 11px; background: #fff; display: flex; flex-direction: column; min-width: 0; }
.pn > h5 { margin: 0; padding: 8px 12px; border-bottom: 1px solid var(--rule); font-size: 11px; letter-spacing: 1.1px; text-transform: uppercase; color: var(--ink-3); font-weight: 750; display: flex; justify-content: space-between; gap: 8px; align-items: center; }
.pn > h5 .extra { text-transform: none; letter-spacing: 0; font-weight: 500; font-size: 12px; color: var(--ink-3); }
.pn-corpo { padding: 10px 12px; overflow: auto; }

/* código ativo */
.cod { position: relative; background: var(--code); color: var(--code-t); font: 12.8px/1.72 var(--m); padding: 8px 0; border-radius: 0 0 10px 10px; overflow: auto; max-height: 460px; }
.cod .l { display: block; white-space: pre; padding: 0 14px 0 0; border-left: 3px solid transparent; transition: background .18s; }
.cod .l .ln { display: inline-block; width: 38px; padding-right: 12px; text-align: right; color: #6f8b92; font-size: 11px; user-select: none; }
.cod .l.on { background: #3a2c2a; border-left-color: #ff6b5a; color: #fff; }
.cod .l.on.ret { background: #1f4a37; border-left-color: #5fd49a; }
.cod .l.on.cha { background: #23384a; border-left-color: #7fc1ff; }
.cod .l.on.err { background: #5a1f1a; border-left-color: #ff4d3d; }
.cod .l.pai { background: #1e343c; border-left-color: #e0a458; }

/* variáveis */
.frames { display: flex; flex-direction: column-reverse; gap: 7px; }
.fr { border: 1.5px solid var(--rule-2); border-radius: 9px; background: #fbfcfc; padding: 7px 10px; transition: all .2s; }
.fr.topo { border-color: #e0392b; background: #fff6f4; box-shadow: 0 0 0 3px #e0392b14; }
.fr.novo { animation: entra .32s ease; }
.fr .nm { font: 700 12.5px var(--m); color: var(--ink); display: flex; justify-content: space-between; gap: 8px; }
.fr .nm small { font: 500 11px var(--f); color: var(--ink-3); }
.fr table { border-collapse: collapse; width: 100%; margin-top: 4px; font: 12.5px var(--m); }
.fr td { padding: 2px 6px 2px 0; vertical-align: top; }
.fr td.nome { color: var(--ink-2); width: 1%; white-space: nowrap; }
.fr td.val { color: var(--ink); word-break: break-all; }
.fr tr.mudou td.val { background: #fff1c9; border-radius: 4px; animation: pisca .6s ease; }
.fr tr.mudou td.nome { color: #8a5313; font-weight: 700; }
.fr .ref { color: var(--azul); }
.estaticos { font: 12px var(--m); color: var(--ink-2); border-top: 1px dashed var(--rule-2); padding-top: 6px; margin-top: 6px; }

.saida { background: var(--code); color: #bdf5d3; font: 13px/1.55 var(--m); padding: 9px 12px; min-height: 46px; white-space: pre-wrap; border-radius: 0 0 10px 10px; max-height: 200px; overflow: auto; }
.saida .nova { color: #fff; background: #2a5a45; }
.saida .err { color: #ffb4a8; }

/* narração e controles */
.dp-narra { display: flex; gap: 12px; align-items: flex-start; background: var(--sunk); border-top: 1px solid var(--rule); padding: 12px 18px; min-height: 58px; }
.dp-narra .pn-n { font: 700 12px/1 var(--m); color: #fff; background: #e0392b; border-radius: 5px; padding: 6px 9px; white-space: nowrap; }
.dp-narra .pn-n.cha { background: var(--azul); } .dp-narra .pn-n.ret { background: var(--green); } .dp-narra .pn-n.err { background: #8a2a1e; }
.dp-narra .tx { font: 14.5px/1.5 var(--m); color: var(--ink); white-space: pre-wrap; word-break: break-word; }
.dp-narra .tx.erro { color: #a04422; font-weight: 700; }
.dp-narra .dica-alg { display: block; font: 14px/1.5 var(--f); color: var(--ink-2); margin-top: 4px; }
.dp-ctrl { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; padding: 10px 18px 14px; border-top: 1px solid var(--rule); }
.dp-ctrl .btn { min-height: 36px; padding: 5px 11px; }
.dp-ctrl .sl { flex: 1; min-width: 150px; display: flex; flex-direction: column; gap: 3px; }
.dp-ctrl input[type=range].tempo { width: 100%; accent-color: var(--green); margin: 0; }
.dp-ctrl canvas { width: 100%; height: 5px; border-radius: 3px; display: block; }
.dp-ctrl .conta { font: 12px var(--m); color: var(--ink-3); min-width: 88px; text-align: right; }
.dp-ctrl .vel { display: flex; gap: 6px; align-items: center; font-size: 12.5px; color: var(--ink-2); }
.dp-ctrl .vel input { width: 90px; accent-color: var(--green); }

/* tabela de simulação */
.dp-tabela { border-top: 1px solid var(--rule); padding: 12px 18px 16px; }
.dp-tabela summary { cursor: pointer; font-weight: 700; font-size: 14px; }
.tab-sim { border-collapse: collapse; font: 13px var(--m); margin-top: 10px; min-width: 360px; }
.tab-sim th, .tab-sim td { border: 1px solid var(--rule); padding: 4px 10px; text-align: center; }
.tab-sim th { background: var(--sunk2); font: 700 11.5px var(--f); color: var(--ink-2); }
.tab-sim tr.on td { background: #fff1c9; font-weight: 700; }
.tab-sim tr.fut td { color: #c6d0d2; }
.tab-wrap { overflow-x: auto; }

/* ============================================================ VISUALIZAÇÕES */
.viz { display: flex; flex-direction: column; gap: 14px; }
.vz-rot { font-size: 11px; letter-spacing: 1px; text-transform: uppercase; color: var(--ink-3); font-weight: 700; margin-bottom: 4px; display: flex; gap: 8px; align-items: baseline; }
.vz-rot code { text-transform: none; letter-spacing: 0; font-size: 12px; color: var(--ink-2); }
.arr { display: flex; gap: 4px; overflow-x: auto; padding: 22px 2px 36px; position: relative; align-items: flex-end; min-height: 106px; }
.arr.barras { min-height: 170px; }
.cel { position: relative; flex: 0 0 auto; min-width: 42px; display: flex; flex-direction: column; align-items: center; }
.cel .cx { width: 100%; min-width: 42px; height: 42px; border: 2px solid var(--rule-2); border-radius: 7px; background: #fff; display: grid; place-items: center; font: 700 15px var(--m); color: var(--ink); transition: background .25s, border-color .25s, transform .25s; padding: 0 5px; }
.arr.barras .cx { align-items: start; padding-top: 3px; font-size: 13px; border-radius: 6px 6px 3px 3px; transition: height .3s ease, background .25s; }
.cel .ix { font: 11px var(--m); color: var(--ink-3); margin-top: 3px; }
.cel.lido .cx { border-color: var(--azul); box-shadow: 0 0 0 3px #215c7a33; }
.cel.escrito .cx { border-color: var(--laranja); background: #ffe2b8; animation: salta .45s ease; }
.cel.fora .cx { opacity: .28; }
.cel .pts { position: absolute; top: 100%; margin-top: 16px; display: flex; flex-direction: column; align-items: center; gap: 1px; }
.pt { font: 700 11px var(--m); padding: 1px 6px; border-radius: 4px; color: #fff; white-space: nowrap; }
.pt::before { content: "▲ "; font-size: 8px; }
.faixa-leg { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 12px; color: var(--ink-2); }
.faixa-leg i { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 4px; vertical-align: -1px; }
/* cores das faixas */
.z-cand .cx { background: #e3f1ea; border-color: #9fcdb7; }
.z-desc .cx { opacity: .3; }
.z-ord .cx { background: #d7f4e5; border-color: #14674c; }
.z-men .cx { background: #e2edf3; border-color: #7fb1cc; }
.z-mai .cx { background: #fdf1e0; border-color: #e0b27a; }
.z-piv .cx { background: #efe9f8; border-color: var(--roxo); }
.z-esq .cx { background: #e2edf3; border-color: #7fb1cc; }
.z-dir .cx { background: #fdf1e0; border-color: #e0b27a; }
.z-chave .cx { background: #efe9f8; border-color: var(--roxo); }
.chave-flut { display: inline-flex; gap: 6px; align-items: center; font: 13px var(--m); color: var(--ink-2); }
.chave-flut b { display: inline-grid; place-items: center; min-width: 38px; height: 34px; border: 2px dashed var(--roxo); border-radius: 7px; color: var(--roxo); font-size: 15px; padding: 0 5px; }

.grade { display: inline-grid; gap: 3px; padding: 4px; }
.gc { width: 38px; height: 38px; border-radius: 6px; display: grid; place-items: center; font: 700 13px var(--m); position: relative; border: 1.5px solid var(--rule-2); background: #fff; transition: background .2s; }
.gc.parede { background: #3b4b50; border-color: #3b4b50; color: #9aabb0; }
.gc.vis { background: #d7f4e5; border-color: #14674c; }
.gc.fila { box-shadow: inset 0 0 0 3px #e0a458; }
.gc.atual { background: #ffdcd6; border-color: #e0392b; box-shadow: 0 0 0 3px #e0392b44; z-index: 1; }
.gc.cand { background: #e2edf3; border-color: #215c7a; }
.gc.ok { background: #97efbd; }
.gc .dist { position: absolute; bottom: 1px; right: 3px; font: 600 9.5px var(--m); color: var(--green-d); }
.gc .tx { z-index: 1; }

.grafo svg { display: block; max-width: 100%; height: auto; }
.gv circle { fill: #fff; stroke: var(--ink-2); stroke-width: 2; transition: fill .2s; }
.gv text { font: 700 13px var(--m); text-anchor: middle; fill: var(--ink); }
.gv.vis circle { fill: #d7f4e5; stroke: var(--green); }
.gv.fila circle { stroke: #e0a458; stroke-width: 3.5; }
.gv.atual circle { fill: #ffdcd6; stroke: #e0392b; stroke-width: 3; }
.gv.viz circle { stroke: var(--azul); stroke-width: 3.5; }
.gv .dist { font: 600 11px var(--m); fill: var(--green-d); }
.ge { stroke: #b6c3c6; stroke-width: 2; }
.ge.on { stroke: #e0392b; stroke-width: 3; }

.arv { overflow: auto; max-height: 360px; }
.arv svg { display: block; }
.an { cursor: default; }
.an rect { fill: #fff; stroke: #9fb0ac; stroke-width: 1.4; transition: all .2s; }
.an text { font: 600 11px var(--m); text-anchor: middle; fill: var(--ink); }
.an text.rv { fill: var(--green); font-weight: 700; }
.an.feito rect { fill: #f3f7f6; stroke: #c9d5d6; }
.an.feito text { fill: #6d8086; }
.an.feito text.rv { fill: var(--green); }
.an.ativo rect { stroke: #e0392b; stroke-width: 2; fill: #fff6f4; }
.an.topo rect { fill: #ffdcd6; stroke: #e0392b; stroke-width: 2.6; }
.an.entra { animation: surge .35s ease; transform-box: fill-box; transform-origin: center; }
.ae { stroke: #b6c3c6; stroke-width: 1.3; fill: none; }
.ae.ativo { stroke: #e0392b; stroke-width: 2; }

.cols { display: flex; flex-direction: column; gap: 8px; }
.colv { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.colv .nm { font: 700 12px var(--m); color: var(--ink-2); min-width: 70px; }
.chip { font: 600 12.5px var(--m); border: 1.5px solid var(--rule-2); background: #fff; border-radius: 6px; padding: 3px 8px; }
.chip.frente { border-color: #e0a458; background: #fff8e8; }
.chip.topo { border-color: var(--roxo); background: var(--roxo-bg); }
.colv .vazio { font-size: 12px; color: var(--ink-3); }

@keyframes entra { from { opacity: 0; transform: translateY(-8px) scale(.97); } to { opacity: 1; transform: none; } }
@keyframes surge { from { opacity: 0; transform: scale(.4); } to { opacity: 1; transform: none; } }
@keyframes salta { 0% { transform: translateY(0); } 40% { transform: translateY(-7px); } 100% { transform: none; } }
@keyframes pisca { from { background: #ffd66b; } }

/* ============================================================ editor de código */
.ed { position: relative; border: 1px solid #2b4550; border-radius: 10px; background: var(--code); overflow: hidden; }
.ed-in { position: relative; display: grid; grid-template-columns: 44px 1fr; }
.ed-num { font: 13px/1.65 var(--m); color: #6f8b92; text-align: right; padding: 10px 8px 10px 0; user-select: none; background: #102127; white-space: pre; }
.ed-area { position: relative; }
.ed-area pre, .ed-area textarea { margin: 0; padding: 10px 12px; font: 13px/1.65 var(--m); tab-size: 4; white-space: pre; border: 0; overflow: hidden; letter-spacing: 0; }
.ed-area pre { color: var(--code-t); pointer-events: none; min-height: 100%; }
.ed-area textarea { position: absolute; inset: 0; width: 100%; height: 100%; resize: none; background: transparent; color: transparent; caret-color: #fff; outline: none; overflow: auto; }
.ed-area textarea::selection { background: #3d6b7a; color: transparent; }
.ed-scroll { overflow: auto; max-height: 520px; }
.ed .lerr { background: #5a1f1a; display: inline-block; width: 100%; }

/* ============================================================ perguntas e exercícios */
.filtros { display: flex; gap: 6px; flex-wrap: wrap; margin: 6px 0 14px; }
.pg-lista { display: flex; flex-direction: column; gap: 12px; }
.pg-card { background: #fff; border: 1px solid var(--rule); border-left: 4px solid var(--azul); border-radius: 10px; padding: 14px 18px; display: flex; flex-direction: column; gap: 8px; }
.pg-card.g-var { border-left-color: var(--laranja); } .pg-card.g-cod { border-left-color: var(--roxo); }
.pg-card.marcou-sei { border-left-color: var(--green); } .pg-card.marcou-rev { border-left-color: #e0a458; }
.pg-card header { display: flex; gap: 10px; align-items: center; }
.pg-num { font: 700 12px var(--m); color: #fff; background: var(--ink); border-radius: 5px; padding: 3px 8px; }
.pg-tag { font-size: 11px; letter-spacing: 1px; text-transform: uppercase; font-weight: 700; color: var(--ink-3); }
.pg-p { font-size: 16px; font-weight: 600; }
.pg-p p { margin: 0; }
.pg-acoes { display: flex; gap: 8px; flex-wrap: wrap; }
.pg-acoes .btn { min-height: 32px; padding: 4px 12px; font-size: 13px; }
.pg-r { border-top: 1px dashed var(--rule-2); padding-top: 10px; animation: entra .25s ease; }
.pg-r p { margin: 0 0 10px; }
details.dica summary { cursor: pointer; font-size: 13px; color: var(--green); font-weight: 650; width: max-content; }
details.dica p { margin: 4px 0 0; font-size: 14px; color: var(--ink-2); }
.progresso { display: flex; align-items: center; gap: 12px; margin: 4px 0 10px; }
.progresso .barra { flex: 1; max-width: 420px; height: 8px; border-radius: 99px; background: var(--sunk2); display: flex; overflow: hidden; }
.progresso .b1 { background: var(--green); transition: width .3s; } .progresso .b2 { background: #e0a458; transition: width .3s; }
.progresso .t { font: 12.5px var(--m); color: var(--ink-2); }

.ex { background: #fff; border: 1px solid var(--rule); border-radius: 12px; box-shadow: var(--sh); padding: 16px 18px; display: flex; flex-direction: column; gap: 10px; }
.ex header { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.ex .tipo { font-size: 11px; letter-spacing: 1px; text-transform: uppercase; font-weight: 750; padding: 3px 9px; border-radius: 5px; }
.tipo.rastreio { background: var(--azul-bg); color: var(--azul); } .tipo.completar { background: var(--roxo-bg); color: var(--roxo); } .tipo.escrever { background: var(--laranja-bg); color: #8a5313; } .tipo.escolha { background: var(--mint-2); color: var(--green-d); }
.ex .algo { font-size: 12.5px; color: var(--ink-3); }
.ex .estado { margin-left: auto; font: 700 12px var(--m); }
.ex .estado.ok { color: var(--green); } .ex .estado.ruim { color: #a04422; }
.ex h4 { margin: 0; font-size: 16.5px; }
.ex .enun p { margin: 0 0 8px; }
.ex .resp { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.ex .resp input { border: 1px solid var(--rule-2); border-radius: 7px; padding: 7px 10px; font: 14px var(--m); min-width: 260px; flex: 1; max-width: 520px; }
.ex .fb { border-radius: 8px; padding: 9px 12px; font-size: 14.5px; }
.ex .fb.ok { background: var(--mint-l); border: 1px solid #b8d4c7; color: var(--green-d); }
.ex .fb.ruim { background: var(--vermelho-bg); border: 1px solid #efc3b6; color: #8a2a1e; }
.testes { border-collapse: collapse; font: 12.5px var(--m); width: 100%; margin-top: 6px; }
.testes th, .testes td { border-bottom: 1px solid var(--rule); padding: 5px 8px; text-align: left; vertical-align: top; }
.testes th { font: 700 11px var(--f); color: var(--ink-3); text-transform: uppercase; letter-spacing: .6px; }
.testes td.ok { color: var(--green); font-weight: 700; } .testes td.ruim { color: #a04422; font-weight: 700; }
.lacuna { font: inherit; background: #25404a; color: #fff; border: 1px dashed #7fc1ff; border-radius: 4px; padding: 0 4px; min-width: 120px; outline: none; }
.lacuna:focus { border-style: solid; background: #2c4d59; }
.lacuna.ok { border-color: #5fd49a; } .lacuna.ruim { border-color: #ff8a80; }
.escolhas { display: flex; flex-direction: column; gap: 6px; }
.escolhas button { text-align: left; border: 1px solid var(--rule-2); background: #fff; border-radius: 8px; padding: 8px 12px; font-size: 14.5px; }
.escolhas button:hover { border-color: var(--green); }
.escolhas button.certa { background: var(--mint-l); border-color: var(--green); font-weight: 650; }
.escolhas button.errada { background: var(--vermelho-bg); border-color: #efc3b6; text-decoration: line-through; }

/* problemas e variações */
.prob { background: #fff; border: 1px solid var(--rule); border-radius: 11px; padding: 14px 16px; display: flex; flex-direction: column; gap: 6px; }
.prob h4 { margin: 0; font-size: 15.5px; }
.prob .lc { font: 600 11.5px var(--m); color: var(--ink-3); }
.prob p { margin: 0; font-size: 14.5px; color: var(--ink-2); }
.prob .muda { font-size: 14px; border-top: 1px dashed var(--rule-2); padding-top: 6px; color: var(--ink); }
.prob .muda b { color: #8a5313; }
.var { background: #fff; border: 1px solid var(--rule); border-left: 4px solid var(--laranja); border-radius: 11px; padding: 14px 18px; margin-bottom: 14px; }
.var h4 { margin: 0 0 4px; font-size: 16px; }
.var .quando { font-size: 13.5px; color: var(--ink-2); margin: 0 0 8px; }
.var .acoes { display: flex; gap: 8px; flex-wrap: wrap; }
.erro-c { background: #fff; border: 1px solid var(--rule); border-left: 4px solid var(--vermelho); border-radius: 11px; padding: 12px 16px; }
.erro-c h4 { margin: 0 0 4px; font-size: 15px; }
.erro-c p { margin: 0 0 8px; font-size: 14.5px; color: var(--ink-2); }

/* home */
.cards-alg { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); }
.ca { background: #fff; border: 1px solid var(--rule); border-radius: 12px; padding: 16px 18px; text-decoration: none; color: inherit; display: flex; flex-direction: column; gap: 6px; box-shadow: var(--sh); transition: transform .15s, border-color .15s; }
.ca:hover { transform: translateY(-2px); border-color: var(--green); }
.ca .au { font: 600 11.5px var(--m); color: var(--ink-3); }
.ca h3 { margin: 0; font-size: 18px; }
.ca p { margin: 0; font-size: 14.5px; color: var(--ink-2); }
.ca .cx2 { font: 700 12.5px var(--m); color: var(--green); }
footer.rod { margin-top: 60px; padding-top: 18px; border-top: 1px solid var(--rule); font-size: 13px; color: var(--ink-3); max-width: 860px; }