/* ===========================================================================
   aula.css — material das aulas (estende o design system de disciplinas.css)
   Prof. Me. Luiz Ricardo Mantovani da Silva
   =========================================================================== */
:root{
  --ok:#10b981; --warn:#f59e0b; --bad:#ef4444; --info:#0ea5e9;
  --code-bg:#0f172a; --code-ink:#e2e8f0;
}

/* ---- progresso de leitura ---- */
.readbar{position:fixed;top:0;left:0;height:3px;width:0;z-index:60;
  background:linear-gradient(90deg,#60a5fa,#a78bfa);transition:width .1s}

/* ---- hero da aula ---- */
.hero .weekbadge{display:inline-block;background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.28);color:#fff;font-weight:700;
  padding:.3rem .8rem;border-radius:999px;font-size:.8rem;margin-bottom:14px}
.hero .meta{display:flex;flex-wrap:wrap;gap:18px;margin-top:22px;font-size:.9rem;color:#dbeafe}
.hero .meta b{color:#fff}

/* ---- barra de navegação entre aulas ---- */
.lessonnav{display:flex;justify-content:space-between;gap:12px;margin:30px 0 0}
.lessonnav a{flex:1;background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:14px 18px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);
  transition:.2s;display:flex;flex-direction:column;gap:2px}
.lessonnav a:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--blue)}
.lessonnav a.next{text-align:right;align-items:flex-end}
.lessonnav a.disabled{opacity:.4;pointer-events:none}
.lessonnav small{color:var(--muted);font-size:.72rem;text-transform:uppercase;letter-spacing:.5px}
.lessonnav span{font-weight:700;font-size:.95rem}

/* ---- índice lateral (objetivos) ---- */
.goals{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin-top:6px}
.goal{display:flex;gap:12px;align-items:flex-start;background:#f8faff;border:1px solid var(--line);
  border-radius:12px;padding:14px}
.goal .gi{flex-shrink:0;width:30px;height:30px;border-radius:9px;
  background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.85rem}
.goal p{font-size:.9rem;margin:0;color:var(--body)}

/* ---- blocos de conteúdo ---- */
.lesson h3{font-family:var(--serif);color:var(--ink);font-size:1.3rem;margin:26px 0 10px}
.lesson h4{color:var(--ink);font-size:1.02rem;margin:18px 0 8px}
.lesson p{margin-bottom:12px}
.lesson ul,.lesson ol{margin:0 0 14px 22px}
.lesson li{margin-bottom:7px}
.lesson strong{color:var(--ink)}
.lesson .lead-in{font-size:1.05rem;color:var(--body)}

/* destaque/callouts */
.callout{border-radius:12px;padding:16px 18px;margin:16px 0;font-size:.95rem;
  display:flex;gap:12px;align-items:flex-start;border:1px solid}
.callout .ci{font-size:1.2rem;line-height:1.2}
.callout.tip{background:#ecfdf5;border-color:#a7f3d0;color:#065f46}
.callout.warn{background:#fffbeb;border-color:#fde68a;color:#92400e}
.callout.info{background:#eff6ff;border-color:#bfdbfe;color:#1e40af}
.callout.key{background:#faf5ff;border-color:#e9d5ff;color:#6b21a8}
.callout b{color:inherit}

/* definição */
.defbox{border-left:4px solid var(--blue);background:#f8faff;border-radius:0 12px 12px 0;
  padding:14px 18px;margin:16px 0}
.defbox .term{font-weight:800;color:var(--ink)}

/* código */
.code{background:var(--code-bg);color:var(--code-ink);border-radius:12px;padding:16px 18px;
  margin:14px 0;overflow:auto;font-family:'JetBrains Mono',ui-monospace,Menlo,Consolas,monospace;
  font-size:.86rem;line-height:1.6;position:relative}
.code .cm{color:#64748b}.code .kw{color:#c4b5fd}.code .st{color:#86efac}
.code .nm{color:#fca5a5}.code .fn{color:#93c5fd}
.code .copy{position:absolute;top:8px;right:8px;background:rgba(255,255,255,.1);color:#cbd5e1;
  border:none;border-radius:7px;padding:.3rem .6rem;font-size:.72rem;cursor:pointer;font-family:var(--sans)}
.code .copy:hover{background:rgba(255,255,255,.2)}

/* tabela genérica */
.tbl{width:100%;border-collapse:collapse;font-size:.92rem;margin:14px 0;
  border:1px solid var(--line);border-radius:12px;overflow:hidden}
.tbl th,.tbl td{padding:10px 13px;text-align:left;border-bottom:1px solid var(--line)}
.tbl thead th{background:#f1f5f9;color:var(--ink);font-weight:700;font-size:.82rem}
.tbl tbody tr:nth-child(even){background:#fafbff}
.tbl td code{background:#eef2ff;padding:.1rem .4rem;border-radius:5px;font-size:.85rem}

/* diagrama de fases / fluxo */
.flow{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:16px 0}
.flow .step{background:linear-gradient(135deg,#eff6ff,#faf5ff);border:1px solid var(--line);
  border-radius:10px;padding:10px 14px;font-weight:600;color:var(--ink);font-size:.88rem;text-align:center}
.flow .arr{color:var(--purple);font-weight:800}

/* analogia */
.analogy{background:linear-gradient(135deg,#fef3c7,#fde68a);border-radius:14px;padding:18px 20px;
  margin:16px 0;color:#78350f}
.analogy .at{font-weight:800;display:flex;gap:8px;align-items:center;margin-bottom:6px}

/* flashcards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:16px 0}
.flip{perspective:1000px;height:150px;cursor:pointer}
.flip-in{position:relative;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d}
.flip.on .flip-in{transform:rotateY(180deg)}
.flip-f,.flip-b{position:absolute;inset:0;backface-visibility:hidden;border-radius:14px;
  display:flex;align-items:center;justify-content:center;text-align:center;padding:16px;
  box-shadow:var(--shadow)}
.flip-f{background:#fff;border:1px solid var(--line);font-weight:700;color:var(--ink)}
.flip-b{background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;
  transform:rotateY(180deg);font-size:.9rem;line-height:1.5}
.flip .hint{position:absolute;bottom:8px;right:12px;font-size:.68rem;color:var(--muted);font-weight:600}

/* atividade em grupo */
.group{background:linear-gradient(135deg,#0f766e,#0e7490);color:#fff;border-radius:20px;
  padding:30px;margin:24px 0;box-shadow:var(--shadow-lg)}
.group .eyebrow{color:#99f6e4}
.group h2.sec,.group h3{color:#fff}
.group .gmeta{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0}
.group .gtag{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);
  padding:.3rem .75rem;border-radius:999px;font-size:.8rem;font-weight:600}
.group ol{margin:14px 0 0 20px}.group ol li{margin-bottom:8px;color:#ccfbf1}
.group .roles{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-top:16px}
.group .role{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);
  border-radius:12px;padding:14px}
.group .role b{display:block;margin-bottom:4px}
.group .role span{font-size:.85rem;color:#ccfbf1}
.group .deliver{margin-top:16px;background:rgba(0,0,0,.18);border-radius:12px;padding:14px 16px;font-size:.92rem}

/* check de objetivos / takeaways */
.takeaways{background:#faf5ff;border:1px solid #e9d5ff;border-radius:16px;padding:24px 26px;margin:22px 0}
.takeaways h3{margin-top:0;color:#6b21a8}
.takeaways li{margin-bottom:8px}
.takeaways li::marker{content:"✓ ";color:var(--ok);font-weight:800}

/* ===========================================================================
   SIMULADORES
   =========================================================================== */
.sim{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);
  padding:24px;margin:22px 0;overflow:hidden}
.sim .simhead{display:flex;align-items:center;gap:12px;margin-bottom:6px}
.sim .simicon{width:38px;height:38px;border-radius:11px;flex-shrink:0;
  background:linear-gradient(135deg,#0ea5e9,#6366f1);color:#fff;display:flex;
  align-items:center;justify-content:center;font-size:1.1rem}
.sim h3{margin:0;font-family:var(--serif);color:var(--ink);font-size:1.25rem}
.sim .simsub{color:var(--muted);font-size:.9rem;margin:2px 0 16px}
.sim .ctrls{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:14px}
.sim label{font-size:.8rem;font-weight:600;color:var(--ink);display:flex;flex-direction:column;gap:4px}
.sim input[type=text],.sim input[type=number],.sim select,.sim textarea{
  font-family:inherit;font-size:.9rem;padding:.5rem .7rem;border:1.5px solid var(--line);
  border-radius:9px;background:#fff;color:var(--ink)}
.sim input:focus,.sim select:focus,.sim textarea:focus{outline:none;border-color:var(--blue)}
.sim textarea{font-family:ui-monospace,Menlo,Consolas,monospace;width:100%;resize:vertical}
.sim .btn{background:linear-gradient(135deg,#3b82f6,#7c3aed);color:#fff;border:none;
  padding:.55rem 1.1rem;border-radius:10px;font-weight:700;font-family:inherit;cursor:pointer;
  font-size:.88rem;transition:.15s}
.sim .btn:hover{transform:translateY(-2px)}
.sim .btn.ghost{background:#eef2ff;color:var(--blue)}
.sim .btn.sm{padding:.35rem .7rem;font-size:.8rem}
.sim .chiprow{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.sim .schip{background:#eef2ff;border:1px solid var(--line);border-radius:999px;
  padding:.3rem .8rem;font-size:.82rem;font-weight:600;color:var(--blue);cursor:pointer}
.sim .schip.on{background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;border-color:transparent}
.sim .simout{margin-top:8px}
.sim .metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:10px;margin-top:14px}
.sim .metric{background:#f8faff;border:1px solid var(--line);border-radius:12px;padding:12px;text-align:center}
.sim .metric b{display:block;font-size:1.5rem;font-family:var(--serif);color:var(--ink)}
.sim .metric span{font-size:.72rem;text-transform:uppercase;letter-spacing:.4px;color:var(--muted)}
.sim .hintline{font-size:.84rem;color:var(--muted);margin-top:10px}

/* gantt */
.gantt{display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;margin-top:6px;min-height:46px}
.gantt .gseg{display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;
  font-size:.82rem;border-right:2px solid #fff;transition:width .3s;position:relative;min-width:24px}
.gantt .gseg.idle{background:#cbd5e1;color:#475569}
.gaxis{display:flex;margin-top:2px;font-size:.7rem;color:var(--muted)}
.gaxis span{flex:1;text-align:right;border-right:1px dashed transparent}

/* frames de memória (page replacement) */
.frames{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}
.fcol{display:flex;flex-direction:column;gap:3px;align-items:center}
.fcol .ref{font-weight:800;color:var(--ink);font-size:.85rem;margin-bottom:2px}
.fcell{width:34px;height:30px;border:1px solid var(--line);border-radius:6px;display:flex;
  align-items:center;justify-content:center;font-size:.8rem;font-weight:700;background:#fff}
.fcell.hit{background:#dcfce7;border-color:#86efac;color:#166534}
.fcell.fault{background:#fee2e2;border-color:#fca5a5;color:#991b1b}
.fcol .fl{font-size:.66rem;font-weight:700}
.fcol .fl.F{color:var(--bad)}.fcol .fl.H{color:var(--ok)}

/* disco */
.diskwrap{position:relative;margin-top:10px}
.simsvg{width:100%;height:auto;display:block}

/* lexer / tokens */
.tokens{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.tok{border-radius:7px;padding:.25rem .55rem;font-size:.8rem;font-weight:700;
  font-family:ui-monospace,monospace;border:1px solid}
.tok small{display:block;font-size:.6rem;font-weight:600;opacity:.8;text-transform:uppercase}
.tok.NUM{background:#fee2e2;border-color:#fca5a5;color:#991b1b}
.tok.ID{background:#dbeafe;border-color:#93c5fd;color:#1e40af}
.tok.KW{background:#f3e8ff;border-color:#d8b4fe;color:#6b21a8}
.tok.OP{background:#fef3c7;border-color:#fcd34d;color:#92400e}
.tok.PUNCT{background:#e2e8f0;border-color:#cbd5e1;color:#334155}
.tok.STR{background:#dcfce7;border-color:#86efac;color:#166534}
.tok.ERR{background:#1e293b;border-color:#475569;color:#fca5a5}

/* lista de aulas no hub */
.llist{display:grid;gap:10px}
.lrow{display:flex;align-items:center;gap:16px;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:14px 18px;text-decoration:none;color:var(--ink);transition:.18s}
.lrow:hover{transform:translateX(4px);box-shadow:var(--shadow-lg);border-color:var(--blue)}
.lrow .num{flex-shrink:0;width:38px;height:38px;border-radius:10px;
  background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;display:flex;
  align-items:center;justify-content:center;font-weight:800}
.lrow-main{flex:1;display:flex;flex-direction:column;gap:3px}
.lrow-main b{font-size:1rem}
.lrow-sum{font-size:.86rem;color:var(--muted);font-weight:400}
.ltags{display:flex;flex-wrap:wrap;gap:5px;margin-top:4px}
.ltag{font-size:.7rem;font-weight:600;background:#e0f2fe;color:#0369a1;padding:.15rem .5rem;border-radius:999px}
.ltag.grp{background:#ccfbf1;color:#0f766e}
.lrow .uhours{flex-shrink:0;font-size:.76rem;font-weight:600;color:var(--muted);background:#eef2ff;padding:.25rem .6rem;border-radius:999px}
.lrow-go{flex-shrink:0;color:var(--blue);font-weight:800;font-size:1.2rem}

/* árvore AST (mini-compilador) */
.asttree{font-family:ui-monospace,monospace;margin:8px 0}
.asttree ul{list-style:none;padding-left:22px;margin:0;position:relative}
.asttree>ul{padding-left:0}
.asttree li{position:relative;padding:4px 0 4px 4px}
.asttree li::before{content:"";position:absolute;left:-12px;top:0;border-left:1px solid var(--line);height:100%}
.asttree .nodeop{display:inline-block;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;
  border-radius:7px;padding:.1rem .5rem;font-weight:700}
.asttree .nodeleaf{display:inline-block;background:#eef2ff;color:var(--ink);border:1px solid var(--line);
  border-radius:7px;padding:.1rem .5rem;font-weight:700}

/* responsivo */
@media(max-width:760px){
  .lessonnav{flex-direction:column}
  .sim{padding:18px}
  .group{padding:22px}
  .lrow{flex-wrap:wrap}
  .lrow .uhours,.lrow-go{display:none}
}

/* ===========================================================================
   WIDGETS INTERATIVOS (ix) — embutíveis em qualquer card
   =========================================================================== */
/* revelar (pergunta → resposta) — só CSS via <details class="reveal"> */
.reveal{border:1px dashed var(--blue);background:#f8faff;border-radius:12px;padding:0;margin:14px 0;overflow:hidden}
.reveal>summary{list-style:none;cursor:pointer;padding:13px 16px;font-weight:700;color:var(--ink);display:flex;gap:10px;align-items:center}
.reveal>summary::-webkit-details-marker{display:none}
.reveal>summary::before{content:"🤔";font-size:1.1rem}
.reveal[open]>summary::before{content:"💡"}
.reveal>summary::after{content:"revelar ▾";margin-left:auto;font-size:.78rem;color:var(--blue);font-weight:600}
.reveal[open]>summary::after{content:"ocultar ▴"}
.reveal .reveal-body{padding:0 16px 16px;color:var(--body);font-size:.95rem;line-height:1.6}

/* passo-a-passo */
.stepper{border:1px solid var(--line);border-radius:14px;background:var(--card);margin:16px 0;overflow:hidden}
.stepper .sx-head{display:flex;align-items:center;gap:12px;padding:12px 16px;background:linear-gradient(135deg,#eff6ff,#faf5ff);border-bottom:1px solid var(--line)}
.stepper .sx-head b{color:var(--ink);font-size:.9rem}
.stepper .sx-dots{display:flex;gap:5px;margin-left:auto}
.stepper .sx-dot{width:8px;height:8px;border-radius:50%;background:#cbd5e1;transition:.2s}
.stepper .sx-dot.on{background:linear-gradient(135deg,var(--blue),var(--purple));transform:scale(1.3)}
.stepper .stp{display:none;padding:16px 18px;animation:fade .3s}
.stepper .stp.on{display:block}
.stepper .stp .sx-label{font-size:.72rem;text-transform:uppercase;letter-spacing:.5px;color:var(--purple);font-weight:700;margin-bottom:6px}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.stepper .sx-nav{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;border-top:1px solid var(--line);background:#fafbff}
.stepper .sx-nav button{background:linear-gradient(135deg,#3b82f6,#7c3aed);color:#fff;border:none;border-radius:9px;padding:.45rem 1rem;font-weight:700;font-family:inherit;cursor:pointer;font-size:.85rem}
.stepper .sx-nav button:disabled{opacity:.4;cursor:default}
.stepper .sx-nav .sx-count{font-size:.8rem;color:var(--muted);font-weight:600}

/* verifique você mesmo (MCQ inline) */
.check{border:1px solid #e9d5ff;background:#faf5ff;border-radius:14px;padding:16px 18px;margin:16px 0}
.check .cq{font-weight:700;color:var(--ink);margin-bottom:12px}
.check .cq::before{content:"✅ Verifique você mesmo · ";color:var(--purple);font-weight:800;font-size:.82rem}
.check .copt{display:block;width:100%;text-align:left;background:#fff;border:1.5px solid var(--line);border-radius:10px;
  padding:11px 14px;margin-bottom:8px;cursor:pointer;font-family:inherit;font-size:.93rem;color:var(--ink);transition:.15s}
.check .copt:hover:not(:disabled){border-color:var(--purple)}
.check .copt.ok{border-color:#34d399;background:#dcfce7}
.check .copt.no{border-color:#f87171;background:#fee2e2}
.check .copt:disabled{cursor:default}
.check .cfb{display:none;margin-top:6px;padding:12px 14px;border-radius:10px;font-size:.9rem;background:#eef2ff;border:1px solid var(--line)}
.check .cfb.show{display:block}

/* "experimente" — caixinha de destaque p/ exemplo interativo */
.tryit{border-left:4px solid var(--purple);background:linear-gradient(135deg,#faf5ff,#eff6ff);
  border-radius:0 12px 12px 0;padding:14px 18px;margin:14px 0}
.tryit .tt{font-weight:800;color:var(--purple);font-size:.82rem;text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px}