/* SQL Learning Lab — usa os tokens de app.css. Aula: leitura primeiro. Prática: editor e resultado primeiro. */

/* ---------- espaço de prática ocupa a largura toda ---------- */
body.lab-largo main { max-width: none; }
.lab .lead { color: var(--muted); font-size: 16px; max-width: 64ch; margin: 8px 0 0; }
.lab-nota { color: var(--muted); font-size: 13.5px; margin: 6px 0 10px; }
.lab-vazio { color: var(--muted); font-size: 14px; }
.lab h3 { font-size: 15.5px; margin: 22px 0 8px; }

/* ---------- início ---------- */
.lab-topo { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 32px; align-items: end; padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.lab-topo h1 { font-size: clamp(30px, 4vw, 44px); letter-spacing: -.03em; }
.lab-topo-acoes { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }
.lab-numeros { display: grid; grid-template-columns: 1fr 1fr; gap: 0; margin: 0; border: 1px solid var(--line); border-radius: var(--r-l); background: var(--surface); }
.lab-numeros > div { padding: 16px 18px; min-width: 0; }
.lab-numeros > div:nth-child(2n) { border-left: 1px solid var(--line); }
.lab-numeros > div:nth-child(n+3) { border-top: 1px solid var(--line); }
.lab-numeros dt { font-size: 12.5px; color: var(--muted); font-weight: 600; }
.lab-numeros dd { margin: 4px 0 6px; font: 700 26px/1.1 var(--fonte-display); color: var(--ink); }
.lab-numeros dd small { font-size: 15px; color: var(--muted); font-weight: 600; }
.lab-numeros span { font-size: 12.5px; color: var(--muted); }
.lab-barra { display: block; height: 5px; border-radius: 3px; background: var(--surface-3); overflow: hidden; margin-top: 6px; }
.lab-barra i { display: block; height: 100%; background: var(--acao); border-radius: 3px; }
.lab-como { list-style: none; padding: 0; margin: 22px 0 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; font-size: 14px; color: var(--ink-2); }
.lab-como li { padding-left: 14px; border-left: 2px solid var(--line-strong); }

.lab-trilha { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.lab-trilha > li { border-bottom: 1px solid var(--line); }
.lab-trilha summary { display: grid; grid-template-columns: 44px minmax(0, 1fr) 190px; gap: 16px; align-items: center; padding: 16px 4px; cursor: pointer; list-style: none; }
.lab-trilha summary::-webkit-details-marker { display: none; }
.lab-trilha summary:hover .t strong { color: var(--accent); }
.lab-trilha .n { width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; font: 700 15px var(--fonte-display); background: var(--surface-2); color: var(--ink-2); border: 1px solid var(--line); }
.lab-trilha li.feito .n { background: var(--ok); color: #fff; border-color: var(--ok); }
.lab-trilha .t { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.lab-trilha .t strong { font-size: 16px; }
.lab-trilha .t span { font-size: 13.5px; color: var(--muted); }
.lab-trilha .p { font-size: 12.5px; color: var(--muted); }
.lab-aulas { list-style: none; padding: 0 0 14px 60px; margin: 0; display: grid; gap: 2px; }
.lab-aulas a { display: grid; grid-template-columns: 22px minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 8px 10px; border-radius: var(--r-s); text-decoration: none; color: var(--ink); font-size: 14.5px; }
.lab-aulas a:hover { background: var(--surface-2); }
.lab-aulas .st { width: 20px; height: 20px; border-radius: 50%; border: 1.5px solid var(--line-strong); display: grid; place-items: center; color: var(--muted); }
.lab-aulas .st .ic { width: 12px; height: 12px; }
.lab-aulas .st.ok { background: var(--ok); border-color: var(--ok); color: #fff; }
.lab-aulas .des .st { border: 0; }
.lab-aulas .des .st .ic { width: 16px; height: 16px; color: var(--acao); }
.lab-aulas .des .st.ok .ic { color: #fff; width: 12px; height: 12px; }
.lab-aulas .min { font-size: 12.5px; color: var(--muted); }
.lab-desempenho { margin: -6px 0 14px 70px; font-size: 13px; color: var(--muted); }

.lab-colunas-inicio { display: grid; grid-template-columns: 1fr 1fr; gap: 0 40px; }
.lab-lista-links { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.lab-lista-links a { display: flex; justify-content: space-between; gap: 12px; padding: 11px 2px; border-bottom: 1px solid var(--line); text-decoration: none; color: var(--ink); font-size: 14.5px; }
.lab-lista-links a:hover span:first-child { color: var(--accent); }
.lab-lista-links .meta { color: var(--muted); font-size: 13px; white-space: nowrap; }
.lab-lista-links .meta.ok { color: var(--ok); }
.lab-sub { margin-top: 26px; }
.lab-aviso-ia { display: flex; gap: 8px; align-items: flex-start; margin-top: 48px; font-size: 13px; color: var(--muted); }
.lab-aviso-ia .ic { width: 16px; height: 16px; flex: none; margin-top: 1px; }

/* ---------- aula: leitura ---------- */
.lab-aula { max-width: var(--leitura); }
.lab-aula > section { margin-top: 36px; }
.lab-aula h2 { margin-bottom: 12px; }
.lab-aula-cab .meta { display: flex; gap: 14px; flex-wrap: wrap; margin: 10px 0 0; }
.lab-objetivos ul, .lab-resumo ul { margin: 0; padding-left: 20px; display: grid; gap: 6px; }
.lab-resumo { padding: 20px 22px; border-radius: var(--r-l); background: var(--surface-2); }
.lab-texto p { line-height: 1.7; margin: 0 0 14px; }
.lab-texto > * + .codigo, .lab-texto .lab-bloco-sql, .lab-texto .lab-tabela-rolagem, .lab-texto .lab-join { margin: 18px 0; }
.lab-lista { padding-left: 20px; display: grid; gap: 6px; margin: 0 0 14px; }
.lab-bloco-sql { position: relative; }
.lab-bloco-sql .lab-rodar-ex { margin-top: 10px; }
.lab-linha-a-linha { margin: 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.lab-linha-a-linha > div { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.lab-linha-a-linha dt code { font-size: 13px; white-space: pre-wrap; word-break: break-word; }
.lab-linha-a-linha dd { margin: 0; font-size: 14px; color: var(--ink-2); }
.lab-duas { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.lab-erros { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.lab-erros li { display: flex; flex-direction: column; gap: 3px; font-size: 14px; padding-left: 12px; border-left: 2px solid var(--bad); }
.lab-erros li span { color: var(--ink-2); }
.lab-lista-ex { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.lab-lista-ex a { display: grid; grid-template-columns: 30px minmax(0, 1fr) auto; gap: 12px; align-items: center; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); text-decoration: none; color: var(--ink); transition: border-color .15s; }
.lab-lista-ex a:hover { border-color: var(--line-strong); }
.lab-lista-ex .st { width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; background: var(--surface-2); font: 700 13px var(--fonte-display); color: var(--ink-2); }
.lab-lista-ex .st .ic { width: 15px; height: 15px; }
.lab-lista-ex li.resolvido .st { background: var(--ok); color: #fff; }
.lab-lista-ex .t { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.lab-lista-ex .t span { font-size: 13px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lab-lista-ex .meta { font-size: 12.5px; color: var(--muted); white-space: nowrap; }

/* ---------- JOIN visual ---------- */
.lab-join { margin: 18px 0; padding: 18px; min-width: 0; border: 1px solid var(--line); border-radius: var(--r-l); background: var(--surface); display: grid; gap: 12px; }
.lab-join .j-entrada { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 14px; }
.lab-join .j-tab { min-width: 0; overflow-x: auto; }
.lab-join .j-tit { font: 600 12px var(--fonte-mono); color: var(--muted); margin-bottom: 4px; }
.lab-join table { border-collapse: collapse; width: 100%; font: 12.5px var(--fonte-mono); }
.lab-join th, .lab-join td { text-align: left; padding: 4px 8px; border-bottom: 1px solid var(--line); }
.lab-join th { color: var(--muted); font-weight: 600; }
.lab-join tr.par td { background: var(--accent-soft); }
.lab-join tr.so-esq td { background: var(--warn-soft); }
.lab-join tr.so-dir td { background: var(--ok-soft); }
.lab-join tr.fora td { color: var(--muted); text-decoration: line-through; opacity: .7; }
.lab-join .j-seta { font: 600 12.5px var(--fonte-mono); color: var(--accent); }
.lab-join figcaption { font-size: 13.5px; color: var(--ink-2); line-height: 1.6; }
.lab-join .j-chaves { display: flex; flex-wrap: wrap; gap: 4px 12px; margin-top: 6px; font-size: 12px; color: var(--muted); }
.lab-join .j-chaves i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 4px; vertical-align: -1px; }
.lab-join .j-chaves i.par { background: var(--accent-soft); border: 1px solid var(--accent); }
.lab-join .j-chaves i.so-esq { background: var(--warn-soft); border: 1px solid var(--warn); }
.lab-join .j-chaves i.so-dir { background: var(--ok-soft); border: 1px solid var(--ok); }
.lab-join .j-chaves i.fora { border: 1px solid var(--line-strong); }

/* ---------- espaço de prática ---------- */
.lab-espaco { display: grid; grid-template-columns: minmax(300px, 400px) minmax(0, 1fr); gap: 28px; align-items: start; }
.lab-lado { position: sticky; top: 20px; max-height: calc(100vh - 40px); overflow-y: auto; padding-right: 6px; min-width: 0; }
.lab-espaco.expandido { grid-template-columns: minmax(0, 1fr); }
.lab-espaco.expandido .lab-lado { display: none; }
.lab-espaco.expandido .lab-editor .CodeMirror, .lab-espaco.expandido .lab-textarea { min-height: 58vh; }
.lab-principal { min-width: 0; display: grid; gap: 14px; }
.lab-ex-titulo { font-size: 24px; margin: 6px 0 8px; }
.lab-lado .meta { display: flex; gap: 14px; flex-wrap: wrap; margin: 0 0 14px; }
.lab-contexto { color: var(--ink-2); font-size: 14.5px; line-height: 1.6; margin: 0 0 14px; }
.lab-enunciado { padding: 14px 16px; border-left: 3px solid var(--acao); background: var(--surface); border-radius: 0 var(--r) var(--r) 0; font-size: 15px; line-height: 1.6; }
.lab-enunciado strong { font-size: 12.5px; color: var(--muted); }
.lab-enunciado p { margin: 4px 0 0; }
.lab-obj, .lab-tabs-usadas { font-size: 14px; margin: 14px 0 0; color: var(--ink-2); }
.lab-criterio { margin-top: 14px; font-size: 13.5px; color: var(--ink-2); }
.lab-criterio summary { cursor: pointer; color: var(--accent); font-weight: 600; }
.lab-criterio p { margin: 6px 0 0; line-height: 1.55; }
.lab-dicas { margin-top: 18px; }
.lab-dicas-lista { list-style: none; padding: 0; margin: 0 0 10px; display: grid; gap: 8px; }
.lab-dicas-lista li { padding: 10px 12px; border-radius: var(--r); background: var(--warn-soft); font-size: 14px; line-height: 1.5; }
.lab-dicas-lista li span { display: block; font-size: 12px; font-weight: 700; color: var(--warn); }
.lab-solucao { margin-top: 18px; }
.lab-solucao h2 { font-size: 17px; margin-bottom: 8px; }
.lab-solucao p { font-size: 14px; line-height: 1.6; }
.lab-solucao .btn.atencao { color: var(--bad); border-color: var(--bad); }
.lab-prontas { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin-bottom: 18px; font-size: 13px; }
.lab-prontas strong { width: 100%; color: var(--muted); font-size: 12.5px; }

/* editor */
.lab-editor-caixa { border-radius: var(--r-l); overflow: hidden; background: var(--code-bg); border: 1px solid #1a2744; box-shadow: var(--shadow-2); }
.lab-barra-ed { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 8px 12px; font: 500 12px var(--fonte-mono); color: #8d9bb8; background: linear-gradient(180deg, #111c33, #0d172b); border-bottom: 1px solid #1a2744; }
.lab-barra-ed > span:last-child { display: flex; gap: 6px; }
.lab-barra-ed button { background: none; border: 1px solid rgba(255,255,255,.14); color: #c9d2e6; border-radius: 6px; padding: 3px 10px; cursor: pointer; font: 500 12px var(--fonte); }
.lab-barra-ed button:hover { background: rgba(255,255,255,.08); }
.lab-barra-ed button[aria-pressed="true"] { border-color: var(--brasa); color: #fff; }
.lab-editor .CodeMirror { height: auto; min-height: 230px; background: var(--code-bg); color: var(--code-ink); font: 14px/1.65 var(--fonte-mono); font-variant-ligatures: none; }
.lab-editor .CodeMirror-scroll { min-height: inherit; }
.lab-editor .CodeMirror pre.CodeMirror-line, .lab-editor .CodeMirror pre.CodeMirror-line-like { font-variant-ligatures: none; }  /* >= e <> aparecem como digitados */
.lab-textarea { display: block; width: 100%; min-height: 230px; resize: vertical; border: 0; padding: 14px 16px; background: var(--code-bg); color: var(--code-ink); font: 14px/1.65 var(--fonte-mono); }
.lab-textarea:focus { outline: 2px solid var(--brasa); outline-offset: -2px; }
.cm-s-lab .CodeMirror-gutters { background: var(--code-bg); border-right: 1px solid #1a2744; }
.cm-s-lab .CodeMirror-linenumber { color: #4b5b7d; }
.cm-s-lab .CodeMirror-cursor { border-left: 2px solid var(--brasa); }
.cm-s-lab .CodeMirror-selected, .cm-s-lab.CodeMirror-focused .CodeMirror-selected { background: #24375f; }
.cm-s-lab .CodeMirror-line::selection, .cm-s-lab .CodeMirror-line > span::selection { background: #24375f; }
.cm-s-lab .cm-keyword { color: #c9a4ff; }
.cm-s-lab .cm-string, .cm-s-lab .cm-string-2 { color: #a8e29b; }
.cm-s-lab .cm-number { color: #ffbb7a; }
.cm-s-lab .cm-comment { color: #6f7f9f; font-style: italic; }
.cm-s-lab .cm-builtin, .cm-s-lab .cm-type, .cm-s-lab .cm-atom { color: #82c8ff; }
.cm-s-lab .cm-operator, .cm-s-lab .cm-bracket, .cm-s-lab .cm-punctuation { color: #c9d2e6; }
.cm-s-lab .cm-variable-2 { color: #ffd479; }
.cm-s-lab pre.CodeMirror-placeholder { color: #55658a; font-style: italic; }
.cm-s-lab .CodeMirror-matchingbracket { color: #fff !important; background: #2c3c60; }
.CodeMirror-hints { z-index: 50; font: 13px var(--fonte-mono); background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--r-s); box-shadow: var(--shadow-2); }
.CodeMirror-hint { color: var(--ink); padding: 3px 8px; }
li.CodeMirror-hint-active { background: var(--accent); color: var(--accent-ink); }

.lab-acoes { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.lab-atalho { font-size: 12.5px; color: var(--muted); }
.btn.rodando { position: relative; color: transparent !important; }
.btn.rodando::after { content: ""; position: absolute; width: 16px; height: 16px; border-radius: 50%; border: 2px solid currentColor; border-color: var(--ink-2) transparent var(--ink-2) transparent; animation: girar .7s linear infinite; }
.btn.primario.rodando::after { border-color: var(--acao-ink) transparent var(--acao-ink) transparent; }
@keyframes girar { to { transform: rotate(360deg); } }

/* feedback e estados */
.lab-fb { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; border-radius: var(--r); font-size: 14.5px; line-height: 1.55; }
.lab-fb > .ic { flex: none; margin-top: 2px; width: 20px; height: 20px; }
.lab-fb p { margin: 4px 0 0; }
.lab-fb.ok { background: var(--ok-soft); } .lab-fb.ok > .ic { color: var(--ok); }
.lab-fb.erro { background: var(--bad-soft); } .lab-fb.erro > .ic { color: var(--bad); }
.lab-fb-acoes { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.lab-estado { display: flex; gap: 12px; align-items: flex-start; padding: 16px; border: 1px dashed var(--line-strong); border-radius: var(--r); color: var(--ink-2); font-size: 14px; }
.lab-estado > .ic { flex: none; width: 18px; height: 18px; margin-top: 2px; color: var(--muted); }
.lab-estado p { margin: 2px 0 0; color: var(--muted); }
.lab-estado.erro { border: 0; background: var(--bad-soft); color: var(--ink); }
.lab-estado.erro > .ic { color: var(--bad); }
.lab-estado.erro p { color: var(--ink-2); font-family: var(--fonte); }
.lab-estado.carregando-sql { align-items: center; border-style: solid; }
.lab-giro { width: 16px; height: 16px; border-radius: 50%; border: 2px solid var(--line-strong); border-top-color: var(--acao); animation: girar .7s linear infinite; }

/* resultados */
.lab-res-cab { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.lab-res-info { font-size: 13.5px; color: var(--muted); }
.lab-res-info strong { color: var(--ink); }
.lab-res-acoes { display: flex; gap: 4px; }
.lab-tabela-rolagem { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); max-width: 100%; }
.lab-resultado .lab-tabela-rolagem { max-height: 520px; overflow-y: auto; }
.lab-tabela { border-collapse: collapse; width: 100%; font: 13px/1.45 var(--fonte-mono); font-variant-numeric: tabular-nums; }
.lab-tabela th { position: sticky; top: 0; background: var(--surface-2); text-align: left; font-weight: 650; color: var(--ink); padding: 8px 12px; border-bottom: 1px solid var(--line-strong); white-space: nowrap; }
.lab-tabela td { padding: 7px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; max-width: 360px; overflow: hidden; text-overflow: ellipsis; color: var(--ink-2); }
.lab-tabela tr:last-child td { border-bottom: 0; }
.lab-tabela tbody tr:hover td { background: var(--surface-2); }
.lab-tabela td.num { text-align: right; color: var(--ink); }
.lab-tabela td.nulo, .lab-join .nulo { color: var(--muted); font-style: italic; font-size: 12px; }
.lab-tabela.conteudo { font: 14px/1.5 var(--fonte); }
.lab-tabela.conteudo td { white-space: normal; max-width: none; color: var(--ink); }
.lab-tabela.compacta { font-size: 12px; }
.lab-paginas { display: flex; gap: 10px; align-items: center; justify-content: flex-end; margin-top: 8px; font-size: 13px; color: var(--muted); }

/* explorador de tabelas */
.lab-schema-intro { font-size: 13.5px; color: var(--ink-2); line-height: 1.55; margin: 0 0 12px; }
.lab-tab-item { border-top: 1px solid var(--line); }
.lab-tab-item:last-of-type { border-bottom: 1px solid var(--line); }
.lab-tab-item summary { display: flex; justify-content: space-between; align-items: center; padding: 10px 2px; cursor: pointer; }
.lab-tab-item summary .nome { font: 600 14px var(--fonte-mono); color: var(--ink); }
.lab-tab-item summary .qtd { font-size: 12.5px; color: var(--muted); }
.lab-tab-item .desc { font-size: 13px; color: var(--muted); margin: 0 0 8px; line-height: 1.5; }
.lab-colunas { list-style: none; padding: 0; margin: 0 0 10px; display: grid; gap: 2px; }
.lab-colunas li { display: flex; flex-wrap: wrap; gap: 4px 8px; align-items: baseline; padding: 5px 0; border-bottom: 1px dashed var(--line); font-size: 12.5px; }
.lab-colunas .col { font: 600 13px var(--fonte-mono); color: var(--accent); background: none; border: 0; padding: 0; cursor: pointer; }
.lab-colunas .col:hover { text-decoration: underline; }
.lab-colunas .tipo { font: 11.5px var(--fonte-mono); color: var(--muted); }
.lab-colunas .chave { font: 700 10.5px var(--fonte-mono); padding: 1px 5px; border-radius: 4px; }
.lab-colunas .pk { background: var(--acao); color: var(--acao-ink); }
.lab-colunas .fk { background: var(--accent-soft); color: var(--accent); }
.lab-colunas .pode-nulo { font-size: 11px; color: var(--warn); }
.lab-colunas .cdesc { width: 100%; color: var(--muted); }
.lab-tab-acoes { display: flex; gap: 6px; margin-bottom: 10px; }
.lab-exemplo-tab { margin-bottom: 12px; }
.lab-rel { font-size: 13px; color: var(--ink-2); padding-left: 18px; line-height: 1.6; }
.lab-dialeto { display: flex; gap: 8px; font-size: 12.5px; color: var(--muted); line-height: 1.5; margin-top: 14px; }
.lab-dialeto .ic { width: 15px; height: 15px; flex: none; margin-top: 2px; }

/* ---------- responsivo ---------- */
@media (max-width: 1100px) {
  .lab-espaco { grid-template-columns: minmax(0, 1fr); }
  .lab-lado { position: static; max-height: none; overflow: visible; padding-right: 0; }
}
@media (max-width: 900px) {
  .lab-topo { grid-template-columns: minmax(0, 1fr); }
  .lab-colunas-inicio, .lab-duas { grid-template-columns: minmax(0, 1fr); }
  .lab-como { grid-template-columns: minmax(0, 1fr); gap: 10px; }
}
@media (max-width: 640px) {
  .lab-trilha summary { grid-template-columns: 36px minmax(0, 1fr); }
  .lab-trilha .p { grid-column: 2; }
  .lab-aulas { padding-left: 8px; }
  .lab-desempenho { margin-left: 18px; }
  .lab-linha-a-linha > div { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .lab-join .j-entrada { grid-template-columns: minmax(0, 1fr); }
  .lab-numeros dd { font-size: 22px; }
  .lab-atalho { display: none; }
  .lab-lista-ex a { grid-template-columns: 28px minmax(0, 1fr); }
  .lab-lista-ex .meta { grid-column: 2; }
}