:root {
  --bg: #F4F7FB; --painel: #FFFFFF; --borda: #DCE3EC; --texto: #0F172A; --suave: #64748B;
  --pri: #2563EB; --pri2: #14B8A6; --ativo: #F59E0B; --erro: #DC2626;
  --edge: #475569; --code-bg: #F8FAFC; --linha-ativa: #FEF3C7;
  --io-f: #CCFBF1; --io-s: #0D9488; --out-f: #DBEAFE; --out-s: #2563EB;
  --as-f: #F1F5F9; --as-s: #475569; --se-f: #FEF3C7; --se-s: #D97706;
  --rep-f: #EDE9FE; --rep-s: #7C3AED; --term-f: #0F766E;
  --sim: #059669; --nao: #DC2626;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B1220; --painel: #111A2B; --borda: #23324A; --texto: #E2E8F0; --suave: #94A3B8;
    --edge: #94A3B8; --code-bg: #0E1626; --linha-ativa: #4A3A10;
    --io-f: #0F3B37; --out-f: #172B55; --as-f: #1E293B; --as-s: #94A3B8; --se-f: #3B2A0A; --rep-f: #2A1F4D;
    --io-s: #2DD4BF; --out-s: #60A5FA; --se-s: #F59E0B; --rep-s: #A78BFA; --sim: #34D399; --nao: #F87171;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; background: var(--bg); color: var(--texto); font-size: 14px; min-height: 100vh; display: flex; flex-direction: column; }
button, select, input { font: inherit; color: inherit; }
button { cursor: pointer; background: var(--painel); border: 1px solid var(--borda); border-radius: 8px; padding: 6px 11px; }
button:hover:not(:disabled) { border-color: var(--pri); }
button:disabled { opacity: .45; cursor: not-allowed; }
button.prim { background: var(--pri); color: #fff; border-color: var(--pri); }
button.perigo { color: var(--erro); }
select, input { background: var(--painel); border: 1px solid var(--borda); border-radius: 8px; padding: 6px 8px; }
input:focus, select:focus, button:focus-visible { outline: 2px solid var(--pri); outline-offset: 1px; }
code { font-family: var(--mono); font-size: .92em; background: var(--code-bg); padding: 1px 4px; border-radius: 4px; }

/* topo */
.topo { display: flex; align-items: center; gap: 16px; padding: 8px 16px; background: var(--painel); border-bottom: 1px solid var(--borda); flex-wrap: wrap; }
.marca { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--texto); }
.marca .nome { font-size: 22px; font-weight: 800; letter-spacing: -.3px; }
.marca .nome b { background: linear-gradient(90deg, var(--pri2), var(--pri)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.marca .mk { stroke: var(--edge); stroke-width: 4; stroke-linecap: round; } .marca .mkf { fill: var(--edge); }
.acoes { display: flex; gap: 8px; margin-left: auto; flex-wrap: wrap; align-items: center; }
.menu-wrap { position: relative; }
.menu-pop { position: absolute; right: 0; top: calc(100% + 4px); background: var(--painel); border: 1px solid var(--borda); border-radius: 10px; box-shadow: 0 10px 30px rgba(0,0,0,.15); padding: 6px; z-index: 30; min-width: 260px; display: flex; flex-direction: column; }
.menu-pop[hidden] { display: none; }
.menu-pop button { border: 0; text-align: left; padding: 8px 10px; }
.menu-pop button:hover { background: var(--code-bg); }

/* grade principal */
.grade { flex: 1; display: grid; gap: 12px; padding: 12px; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); min-height: 0; height: calc(100vh - 96px); }
.direita { display: flex; flex-direction: column; gap: 12px; min-height: 0; min-width: 0; }
.direita .codigo-painel { flex: 1; min-height: 160px; } .direita .exec-painel { flex: none; }
.painel { background: var(--painel); border: 1px solid var(--borda); border-radius: 12px; display: flex; flex-direction: column; min-height: 0; overflow: hidden; }
.painel-topo { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px 0; }
.painel h2 { font-size: 15px; margin: 0; }
.zoom { display: flex; align-items: center; gap: 4px; } .zoom button { padding: 2px 9px; } .zoom span { min-width: 44px; text-align: center; color: var(--suave); font-size: 12px; }

.vars { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; padding: 8px 12px; border-bottom: 1px solid var(--borda); }
.vars-tit { font-weight: 600; font-size: 13px; }
.var-lista { display: contents; }
.chip { display: inline-flex; align-items: center; gap: 4px; background: var(--code-bg); border: 1px solid var(--borda); border-radius: 999px; padding: 2px 4px 2px 10px; font-family: var(--mono); font-size: 12.5px; }
.chip i { font-style: normal; color: var(--suave); }
.chip button { border: 0; background: none; padding: 0 5px; color: var(--suave); line-height: 1; font-size: 15px; }
.chip button:hover { color: var(--erro); }
.var-form { display: inline-flex; gap: 4px; margin-left: auto; }
.var-form select, .var-form input, .var-form button { padding: 3px 7px; font-size: 13px; }
.dica { font-size: 12px; color: var(--suave); padding: 6px 12px 0; }
.canvas { flex: 1; overflow: auto; padding: 6px; min-height: 0; }
.canvas svg { display: block; margin: 0 auto; }

/* fluxograma */
.fluxo .edge { stroke: var(--edge); stroke-width: 2; fill: none; }
.fluxo .ponta { fill: var(--edge); }
.fluxo .junta { fill: var(--edge); }
.fluxo .lbl { font: 13px var(--mono); text-anchor: middle; fill: var(--texto); pointer-events: none; }
.fluxo .tag { font: 600 11.5px system-ui, sans-serif; }
.fluxo .tag.sim { fill: var(--sim); } .fluxo .tag.nao { fill: var(--nao); }
.fluxo .shape { stroke-width: 2; transition: stroke .15s, stroke-width .15s; }
.fluxo .node { cursor: pointer; }
.fluxo .node:hover .shape { stroke-width: 3; }
.fluxo .t-input .shape { fill: var(--io-f); stroke: var(--io-s); }
.fluxo .t-output .shape { fill: var(--out-f); stroke: var(--out-s); }
.fluxo .t-assign .shape { fill: var(--as-f); stroke: var(--as-s); }
.fluxo .t-if .shape { fill: var(--se-f); stroke: var(--se-s); }
.fluxo .t-while .shape, .fluxo .t-for .shape, .fluxo .t-dowhile .shape { fill: var(--rep-f); stroke: var(--rep-s); }
.fluxo .t-term .shape { fill: var(--term-f); stroke: var(--term-f); }
.fluxo .t-term .lbl { fill: #fff; font-weight: 700; font-family: system-ui, sans-serif; }
.fluxo .t-term { cursor: default; }
.fluxo .node.erro .shape { stroke: var(--erro); stroke-dasharray: 5 3; stroke-width: 2.5; }
.fluxo .node.ativo .shape { stroke: var(--ativo); stroke-width: 4.5; filter: drop-shadow(0 0 6px rgba(245,158,11,.75)); animation: pulso 1s ease-in-out infinite alternate; }
@keyframes pulso { from { filter: drop-shadow(0 0 2px rgba(245,158,11,.5)); } to { filter: drop-shadow(0 0 10px rgba(245,158,11,.95)); } }
.fluxo .add { cursor: pointer; }
.fluxo .node:not(.t-term) { cursor: grab; touch-action: none; }
.fluxo .node.movendo { opacity: .8; cursor: grabbing; }
.fluxo .node.movendo .shape { stroke-width: 3; filter: drop-shadow(0 6px 10px rgba(0,0,0,.25)); }
body.arrastando, body.arrastando * { cursor: grabbing !important; user-select: none; }
body.arrastando .fluxo .add:not(.possivel) { display: none; }
.fluxo .add.possivel circle { fill: #D1FAE5; stroke: var(--sim); }
.fluxo .add.possivel path { stroke: var(--sim); }
.fluxo .add.alvo circle { fill: var(--sim); r: 13; }
.fluxo .add.alvo path { stroke: #fff; }
.fluxo .add circle { fill: var(--painel); stroke: var(--pri); stroke-width: 1.5; }
.fluxo .add path { stroke: var(--pri); stroke-width: 2; stroke-linecap: round; }
.fluxo .add:hover circle { fill: var(--pri); } .fluxo .add:hover path { stroke: #fff; }
.fluxo .bolinha { fill: var(--ativo); stroke: #fff; stroke-width: 2; }
body.executando .fluxo .add { display: none; }
.fluxo .selo { font: 700 11.5px system-ui, sans-serif; text-anchor: start; paint-order: stroke; stroke: var(--painel); stroke-width: 4px; }
.fluxo .selo.sim { fill: var(--sim); } .fluxo .selo.nao { fill: var(--nao); }
.fluxo .node.nao-exec { opacity: .35; }
.fluxo .node.nao-exec .shape { stroke-dasharray: 4 3; }
body.executando .fluxo .node { cursor: default; }
body.executando .vars form, body.executando .chip button { visibility: hidden; }

/* código */
.abas { display: flex; gap: 4px; padding: 8px 12px; border-bottom: 1px solid var(--borda); align-items: center; }
.aba { border-radius: 8px; padding: 4px 12px; }
.aba.ativa { background: var(--pri); color: #fff; border-color: var(--pri); }
.copiar { margin-left: auto; padding: 4px 10px; }
.codigos { flex: 1; display: grid; min-height: 0; }
.codigos.ver-c { grid-template-columns: 1fr; } .codigos.ver-c .cod:nth-child(2) { display: none; }
.codigos.ver-por { grid-template-columns: 1fr; } .codigos.ver-por .cod:nth-child(1) { display: none; }
.codigos.ver-ambos { grid-template-columns: 1fr 1fr; } .codigos.ver-ambos .cod:first-child { border-right: 1px solid var(--borda); }
.cod { display: flex; flex-direction: column; min-height: 0; min-width: 0; }
.cod-tit { display: none; font-size: 11px; font-weight: 700; color: var(--suave); padding: 4px 10px; text-transform: uppercase; letter-spacing: .5px; }
.ver-ambos .cod-tit { display: block; }
.code { flex: 1; margin: 0; padding: 8px 0; list-style: none; counter-reset: ln; overflow: auto; background: var(--code-bg); font: 13px/1.55 var(--mono); }
.code li { counter-increment: ln; white-space: pre; padding: 0 12px 0 0; }
.code li::before { content: counter(ln); display: inline-block; width: 3.2em; padding-right: .9em; text-align: right; color: var(--suave); opacity: .6; user-select: none; }
.code li.ativo { background: var(--linha-ativa); box-shadow: inset 3px 0 0 var(--ativo); }
.code li.erro { color: var(--erro); }
.code .kw { color: #7C3AED; font-weight: 600; } .code .ty { color: #0D9488; } .code .st { color: #B45309; } .code .nu { color: #2563EB; } .code .cm { color: var(--suave); font-style: italic; } .code .pp { color: #DB2777; }
@media (prefers-color-scheme: dark) { .code .kw { color: #C4B5FD; } .code .ty { color: #5EEAD4; } .code .st { color: #FCD34D; } .code .nu { color: #93C5FD; } .code .pp { color: #F9A8D4; } }

/* execução */
.controles { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px 12px 6px; align-items: center; }
.explica { margin-left: auto; display: flex; align-items: center; gap: 5px; font-size: 12px; color: var(--suave); cursor: pointer; }
.vel { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--suave); }
.vel input { width: 110px; padding: 0; }
.status { font-size: 12.5px; padding: 2px 12px 8px; color: var(--suave); min-height: 1.6em; }
.status.erro { color: var(--erro); font-weight: 600; }
.status.ok { color: var(--sim); font-weight: 600; }
.exec-grade { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 10px; padding: 0 12px 12px; }
.sub { font-size: 11px; font-weight: 700; color: var(--suave); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 4px; }
.mesa { max-height: 200px; overflow: auto; }
#tabVars { width: 100%; border-collapse: collapse; font-size: 13px; }
#tabVars th { text-align: left; font-weight: 600; color: var(--suave); font-size: 12px; border-bottom: 1px solid var(--borda); padding: 3px 6px; }
#tabVars td { padding: 3px 6px; border-bottom: 1px solid var(--borda); font-family: var(--mono); }
#tabVars td.vazio { color: var(--suave); }
#tabVars tr.mudou td { animation: mudou 1.1s ease-out; }
@keyframes mudou { from { background: rgba(245,158,11,.45); } to { background: transparent; } }
.console-wrap { display: flex; flex-direction: column; min-width: 0; }
.console { background: #0F172A; color: #E2E8F0; font: 13px/1.5 var(--mono); border-radius: 8px; padding: 8px 10px; height: 170px; overflow: auto; white-space: pre-wrap; word-break: break-word; }
.console .dec { color: #A5B4FC; }
.console .eco { color: #5EEAD4; font-style: italic; opacity: .85; } .console .aviso { color: #FCD34D; } .console .err { color: #FCA5A5; } .console .info { color: #94A3B8; font-style: italic; }
.entrada { display: flex; gap: 6px; margin-top: 6px; align-items: center; }
.entrada[hidden] { display: none; }
.entrada label { font-size: 12.5px; font-weight: 600; color: var(--ativo); white-space: nowrap; }
.entrada input { flex: 1; min-width: 0; font-family: var(--mono); border-color: var(--ativo); }

/* rodapé */
.rodape { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 6px; padding: 6px 16px 10px; font-size: 12px; color: var(--suave); }
.rodape a { color: var(--pri); }

/* pop-up de inserção */
.pop { position: fixed; z-index: 40; background: var(--painel); border: 1px solid var(--borda); border-radius: 12px; box-shadow: 0 12px 34px rgba(0,0,0,.2); padding: 6px; display: flex; flex-direction: column; min-width: 230px; }
.pop[hidden] { display: none; }
.pop-tit { font-size: 11px; font-weight: 700; color: var(--suave); text-transform: uppercase; padding: 4px 8px; }
.pop button { border: 0; text-align: left; display: flex; align-items: center; gap: 10px; padding: 7px 8px; }
.pop button:hover { background: var(--code-bg); }
.pop small { color: var(--suave); margin-left: auto; font-family: var(--mono); }
.ic { width: 22px; height: 14px; display: inline-block; border: 2px solid; }
.ic-io { background: var(--io-f); border-color: var(--io-s); transform: skewX(-18deg); }
.ic-out { background: var(--out-f); border-color: var(--out-s); transform: skewX(-18deg); }
.ic-as { background: var(--as-f); border-color: var(--as-s); border-radius: 2px; }
.ic-se { width: 14px; height: 14px; margin: 0 4px; background: var(--se-f); border-color: var(--se-s); transform: rotate(45deg); }
.pop button[data-tipo=while] .ic-se, .pop button[data-tipo=dowhile] .ic-se { background: var(--rep-f); border-color: var(--rep-s); }
.ic-para { background: var(--rep-f); border-color: var(--rep-s); clip-path: polygon(20% 0, 80% 0, 100% 50%, 80% 100%, 20% 100%, 0 50%); border-width: 0; }

/* diálogos */
dialog { border: 1px solid var(--borda); border-radius: 14px; padding: 0; background: var(--painel); color: var(--texto); width: min(520px, calc(100vw - 32px)); box-shadow: 0 20px 50px rgba(0,0,0,.3); }
dialog::backdrop { background: rgba(15,23,42,.45); }
dialog form { padding: 18px 20px; }
dialog h3 { margin: 0 0 12px; font-size: 17px; }
dialog h4 { margin: 14px 0 6px; }
.campo { display: flex; flex-direction: column; gap: 4px; margin-bottom: 10px; }
.campo > span { font-size: 12.5px; font-weight: 600; }
.campo input, .campo select { font-family: var(--mono); width: 100%; }
.campo small { color: var(--suave); font-size: 12px; }
.linha { display: flex; gap: 8px; } .linha .campo { flex: 1; }
.nova-var { display: flex; gap: 6px; margin-top: 4px; }
.nova-var[hidden] { display: none; }
.erro-msg { color: var(--erro); font-weight: 600; min-height: 1.2em; margin: 4px 0; font-size: 13px; }
.dlg-botoes { display: flex; gap: 8px; margin-top: 8px; } .esp { flex: 1; }
.ajuda-lista { padding-left: 20px; line-height: 1.5; } .ajuda-lista li { margin-bottom: 4px; }
.ref { border-collapse: collapse; font-size: 13px; width: 100%; } .ref td { padding: 4px 6px; border-bottom: 1px solid var(--borda); vertical-align: top; } .ref td:first-child { font-weight: 600; white-space: nowrap; }
.nota { font-size: 12.5px; color: var(--suave); }

.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: #0F172A; color: #fff; padding: 9px 16px; border-radius: 10px; z-index: 60; font-size: 13.5px; box-shadow: 0 8px 24px rgba(0,0,0,.3); }
.toast[hidden] { display: none; }

@media (max-width: 900px) {
  .grade { grid-template-columns: minmax(0, 1fr); height: auto; padding: 8px; }
  .canvas { max-height: 70vh; min-height: 320px; }
  .code { max-height: 320px; }
  .exec-grade { grid-template-columns: minmax(0, 1fr); }
  .codigos.ver-ambos { grid-template-columns: 1fr; } .codigos.ver-ambos .cod:first-child { border-right: 0; border-bottom: 1px solid var(--borda); }
  .topo { padding: 8px; } .acoes { margin-left: 0; }
  .var-form { margin-left: 0; }
  .vel, .explica { margin-left: 0; }
}