/* Curso de Engenharia de IA Aplicada — triadic.life
   Segue a paleta do portal (ouro + tinta) com foco em leitura longa. */
:root {
  --gold: #c9a84c;
  --gold-light: #e8c97a;
  --gold-dim: #7a5f2a;
  --ink: #050508;
  --ink2: #0a0a10;
  --surface: #13131c;
  --surface2: #1b1b27;
  --border: rgba(201, 168, 76, 0.15);
  --border-soft: rgba(255, 255, 255, 0.07);
  --text: #e6e6ee;
  --text-dim: #9a9ab0;
  --cyan: #4ac9c9;
  --green: #5fc98a;
  --red: #e06c6c;
  --code-bg: #0d0d14;
  --radius: 12px;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  background: var(--ink);
  color: var(--text);
  font-family: "Inter", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 15% 20%, rgba(201, 168, 76, 0.05) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 85% 70%, rgba(74, 201, 201, 0.035) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}
a { color: var(--gold-light); }
a:hover { color: var(--gold); }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; border-radius: 4px; }

/* ---------- barra superior ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  background: rgba(5, 5, 8, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar a { text-decoration: none; }
.brand {
  font-family: "Cinzel", serif;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--gold);
  font-size: 14px;
  white-space: nowrap;
}
.crumbs { font-size: 13px; color: var(--text-dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.crumbs a { color: var(--text-dim); }
.crumbs a:hover { color: var(--gold-light); }
.topbar .spacer { flex: 1; }
.progress-pill {
  font-size: 12px;
  color: var(--gold-light);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2px 10px;
  white-space: nowrap;
}

/* ---------- capa / hero ---------- */
.hero { max-width: 980px; margin: 0 auto; padding: 64px 20px 32px; }
.eyebrow {
  font-family: "Cinzel", serif;
  font-size: 11px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--gold-dim);
}
h1, h2, h3 { font-family: "Cinzel", serif; color: #fff; line-height: 1.2; }
.hero h1 { font-size: clamp(30px, 6vw, 52px); font-weight: 900; margin: 12px 0 16px; letter-spacing: 0.02em; }
.hero h1 span { color: var(--gold); }
.lede { font-size: 18px; color: var(--text-dim); max-width: 680px; }
.stats { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 18px;
  min-width: 120px;
}
.stat b { display: block; font-family: "Cinzel", serif; font-size: 24px; color: var(--gold); }
.stat small { color: var(--text-dim); font-size: 12px; }

/* ---------- seções da capa ---------- */
.wrap { max-width: 980px; margin: 0 auto; padding: 0 20px 64px; }
.wrap > h2 { font-size: 22px; margin: 48px 0 8px; }
.wrap > p.sub { color: var(--text-dim); margin-bottom: 20px; }

.diffs { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.diff {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-left: 3px solid var(--gold);
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 14px;
}
.diff b { color: #fff; display: block; margin-bottom: 4px; }
.diff span { color: var(--text-dim); }

.modules { display: grid; gap: 14px; }
.mod {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 18px;
  transition: border-color 0.2s, transform 0.2s;
}
.mod.ready { border-color: var(--border); }
.mod.ready:hover { border-color: var(--gold); transform: translateY(-2px); }
.mod-num {
  font-family: "Cinzel", serif;
  font-size: 28px;
  font-weight: 900;
  color: var(--gold-dim);
  text-align: center;
  line-height: 1;
  padding-top: 4px;
}
.mod.ready .mod-num { color: var(--gold); }
.mod h3 { font-size: 18px; margin-bottom: 4px; }
.mod h3 a { color: #fff; text-decoration: none; }
.mod h3 a:hover { color: var(--gold-light); }
.mod p { color: var(--text-dim); font-size: 14px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.tag {
  font-size: 11px;
  padding: 1px 9px;
  border-radius: 20px;
  border: 1px solid var(--border);
  color: var(--gold-light);
  white-space: nowrap;
}
.tag.new { border-color: rgba(74, 201, 201, 0.4); color: var(--cyan); }
.tag.soon { border-color: var(--border-soft); color: var(--text-dim); }
.tag.ok { border-color: rgba(95, 201, 138, 0.4); color: var(--green); }
details.units { margin-top: 8px; font-size: 14px; }
details.units summary { cursor: pointer; color: var(--gold-light); font-size: 13px; }
details.units ol { margin: 8px 0 0 20px; color: var(--text); }
details.units .proj { margin-top: 8px; color: var(--text-dim); }
details.units .proj b { color: var(--cyan); font-weight: 600; }
details.units .melh { margin-top: 6px; color: var(--text-dim); font-size: 13px; }

/* ---------- layout de módulo ---------- */
.layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 40px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}
.toc {
  position: sticky;
  top: 72px;
  align-self: start;
  max-height: calc(100vh - 90px);
  overflow-y: auto;
  font-size: 14px;
}
.toc h2 { font-size: 12px; letter-spacing: 0.3em; text-transform: uppercase; color: var(--gold-dim); margin-bottom: 10px; }
.toc ol { list-style: none; }
.toc li a {
  display: flex;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 8px;
  color: var(--text-dim);
  text-decoration: none;
  border-left: 2px solid transparent;
}
.toc li a:hover { color: var(--text); background: var(--surface); }
.toc li a.active { color: var(--gold-light); border-left-color: var(--gold); background: var(--surface); }
.toc li a .chk { width: 14px; flex-shrink: 0; color: var(--green); }

.content { max-width: 780px; }
.content > header h1 { font-size: clamp(28px, 5vw, 42px); font-weight: 900; margin: 10px 0 14px; }
.meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 8px; }

.lesson { padding-top: 40px; margin-top: 40px; border-top: 1px solid var(--border-soft); }
.lesson > h2 { font-size: clamp(22px, 3.6vw, 28px); margin-bottom: 4px; }
.lesson > .lesson-meta { font-size: 13px; color: var(--text-dim); margin-bottom: 16px; }
.content h3 { font-size: 18px; margin: 28px 0 8px; color: var(--gold-light); }
.content p, .content ul, .content ol { margin: 12px 0; }
.content ul, .content ol { padding-left: 22px; }
.content li { margin: 4px 0; }
.content strong { color: #fff; }
.content em { color: var(--gold-light); font-style: normal; }

code { font-family: var(--mono); font-size: 0.88em; background: var(--surface2); padding: 1px 6px; border-radius: 5px; }
pre {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 16px;
  overflow-x: auto;
  margin: 16px 0;
  font-size: 13.5px;
  line-height: 1.6;
}
pre code { background: none; padding: 0; font-size: inherit; }
pre[data-lang]::before {
  content: attr(data-lang);
  position: absolute;
  top: 6px;
  right: 56px;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.copy {
  position: absolute;
  top: 6px;
  right: 6px;
  background: var(--surface2);
  color: var(--text-dim);
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  font-size: 11px;
  padding: 2px 8px;
  cursor: pointer;
}
.copy:hover { color: var(--gold-light); }

.callout {
  border: 1px solid var(--border-soft);
  border-left: 3px solid var(--cyan);
  background: rgba(74, 201, 201, 0.05);
  border-radius: 10px;
  padding: 12px 16px;
  margin: 18px 0;
  font-size: 15px;
}
.callout.warn { border-left-color: var(--gold); background: rgba(201, 168, 76, 0.06); }
.callout > b:first-child { display: block; color: #fff; margin-bottom: 2px; }

table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14px; display: block; overflow-x: auto; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border-soft); vertical-align: top; }
th { color: var(--gold-light); font-weight: 600; white-space: nowrap; }

.timeline { list-style: none; padding: 0 !important; border-left: 2px solid var(--border); margin-left: 6px !important; }
.timeline li { position: relative; padding: 0 0 14px 20px; }
.timeline li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--gold);
}
.timeline b { color: var(--gold); font-family: var(--mono); font-size: 14px; margin-right: 6px; }

/* diagrama de camadas IA > ML > DL > LLM */
.nest { margin: 20px 0; font-size: 14px; }
.nest div { border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px 14px; }
.nest div div { margin-top: 10px; }
.nest .l1 { background: rgba(201, 168, 76, 0.03); }
.nest .l2 { background: rgba(201, 168, 76, 0.05); }
.nest .l3 { background: rgba(74, 201, 201, 0.05); border-color: rgba(74, 201, 201, 0.25); }
.nest .l4 { background: rgba(74, 201, 201, 0.10); border-color: rgba(74, 201, 201, 0.45); }
.nest b { color: #fff; }
.nest span { color: var(--text-dim); }

/* fluxo em etapas */
.flow { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 16px 0; font-size: 13px; }
.flow span { background: var(--surface2); border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; }
.flow i { color: var(--gold-dim); font-style: normal; }

/* ---------- exercícios e quiz ---------- */
.exercise {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin: 22px 0;
}
.exercise > h4 { font-family: "Cinzel", serif; color: var(--gold); font-size: 14px; letter-spacing: 0.08em; margin-bottom: 6px; }

.quiz { background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 16px 18px; margin: 22px 0; }
.quiz > h4 { font-family: "Cinzel", serif; color: var(--cyan); font-size: 14px; letter-spacing: 0.08em; margin-bottom: 8px; }
.q { margin: 14px 0; }
.q > p { font-weight: 500; margin: 0 0 8px; }
.q button {
  display: block;
  width: 100%;
  text-align: left;
  font: inherit;
  font-size: 14px;
  color: var(--text);
  background: var(--surface2);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 8px 12px;
  margin: 6px 0;
  cursor: pointer;
}
.q button:hover:not(:disabled) { border-color: var(--gold-dim); }
.q button.right { border-color: var(--green); background: rgba(95, 201, 138, 0.1); }
.q button.wrong { border-color: var(--red); background: rgba(224, 108, 108, 0.1); }
.q button:disabled { cursor: default; }
.q .why { display: none; font-size: 14px; color: var(--text-dim); margin-top: 6px; }
.q.answered .why { display: block; }

.done-btn {
  margin-top: 24px;
  font: inherit;
  font-size: 14px;
  color: var(--ink);
  background: var(--gold);
  border: none;
  border-radius: 8px;
  padding: 8px 16px;
  cursor: pointer;
  font-weight: 600;
}
.done-btn.is-done { background: transparent; color: var(--green); border: 1px solid var(--green); }

.resources li { font-size: 15px; }
.resources small { color: var(--text-dim); }

.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 56px; flex-wrap: wrap; }
.pager a {
  flex: 1;
  min-width: 200px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  text-decoration: none;
  color: var(--text);
  background: var(--surface);
}
.pager a:hover { border-color: var(--gold); }
.pager small { display: block; color: var(--text-dim); font-size: 12px; }
.pager .next { text-align: right; }

footer.foot { text-align: center; padding: 32px 20px; font-size: 12px; color: var(--text-dim); border-top: 1px solid var(--border-soft); }
footer.foot a { color: var(--gold-dim); }

/* ---------- responsivo ---------- */
.toc-toggle { display: none; }
@media (max-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 0; padding-top: 16px; }
  .toc { position: static; max-height: none; margin-bottom: 8px; }
  .toc-toggle {
    display: block;
    width: 100%;
    font: inherit;
    font-size: 14px;
    text-align: left;
    color: var(--gold-light);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 14px;
    cursor: pointer;
  }
  .toc nav { display: none; padding-top: 8px; }
  .toc.open nav { display: block; }
  .toc h2 { display: none; }
}
@media (max-width: 520px) {
  .hero { padding-top: 40px; }
  .mod { grid-template-columns: 1fr; gap: 6px; }
  .mod-num { text-align: left; font-size: 22px; }
  .crumbs { display: none; }
  pre { font-size: 12.5px; padding: 14px 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .mod { transition: none; }
}

details > summary { cursor: pointer; color: var(--gold-light); }
.exercise details { margin-top: 8px; }

/* ---------- glossário e calculadora (trilha preliminar) ---------- */
.glossario dl { margin: 0 0 18px; }
.glossario dt { font-weight: 600; color: var(--gold-light); margin-top: 14px; }
.glossario dt small, .glossario dd small { color: var(--text-dim); font-weight: 400; }
.glossario dd { margin: 4px 0 0; padding-left: 14px; border-left: 2px solid var(--border); }
.glossario h3 { margin-top: 26px; color: var(--gold); }
input[type="search"], input[type="number"] {
  background: var(--surface2); color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; padding: 6px 10px; font: inherit; max-width: 100%;
}
input[type="search"] { width: 280px; }
input:focus-visible { outline: 2px solid var(--gold); outline-offset: 1px; }
.calc label { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between; max-width: 460px; }
.calc input { width: 120px; }
a.btn {
  display: inline-block; padding: 8px 16px; border-radius: 8px; background: var(--gold); color: var(--ink);
  font-weight: 600; text-decoration: none; margin: 4px 0;
}
a.btn:hover { background: var(--gold-light); }
a.btn:focus-visible { outline: 2px solid var(--gold-light); outline-offset: 2px; }
.comece {
  border: 1px solid var(--gold-dim); border-radius: 12px; padding: 20px 22px; margin: 18px 0 8px;
  background: linear-gradient(135deg, rgba(201,168,76,.10), transparent 60%);
}
.comece h3 { margin: 0 0 8px; color: var(--gold-light); }
.comece p { margin: 6px 0; }

/* versão PowerShell dos blocos bash (gerada por curso.js) */
details.pwsh { margin: -8px 0 16px; font-size: 14px; }
details.pwsh > summary { cursor: pointer; color: var(--gold-light); }
details.pwsh > p { color: var(--text-dim); margin: 6px 0; }
details.pwsh pre { margin-top: 8px; }

/* trilhas de entrada na capa */
.trilhas { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin: 12px 0 24px; }
.trilha { border: 1px solid var(--border); background: var(--surface); border-radius: var(--radius); padding: 16px; }
.trilha h3 { margin: 0 0 6px; color: var(--gold-light); font-size: 17px; }
.trilha p { margin: 6px 0; color: var(--text-dim); }
.trilha ol { margin: 8px 0 0; padding-left: 20px; }

/* trilhas com código e com agentes (curso.js: iniciarTrilhas) */
.seletor-trilha { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 18px 0; }
.seletor-trilha span { color: var(--text-dim); font-size: 14px; }
.seletor-trilha button {
  font: inherit; font-size: 14px; padding: 6px 14px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--gold-dim); background: transparent; color: var(--text);
}
.seletor-trilha button[aria-pressed="true"] { background: var(--gold); color: var(--ink); border-color: var(--gold); font-weight: 600; }
.trilha-bloco { display: none; }
.trilha-bloco.ativo, .trilha-bloco.aberto { display: block; }
.trilha-bloco.aberto:not(.ativo) { border-left: 3px solid var(--gold-dim); padding-left: 14px; opacity: .92; }
button.trilha-opcional {
  font: inherit; font-size: 14px; cursor: pointer; background: none; border: 1px dashed var(--gold-dim);
  color: var(--gold-light); border-radius: 8px; padding: 6px 12px; margin: 10px 0;
}
.objetivo-comum { border: 1px solid var(--gold-dim); border-radius: var(--radius); padding: 14px 18px; margin: 16px 0; background: var(--surface); }
.objetivo-comum > b:first-child { display: block; color: var(--gold-light); margin-bottom: 6px; }
.trilha.escolhida { border-color: var(--gold); box-shadow: 0 0 0 1px var(--gold) inset; }
.trilha .btn { margin-top: 10px; }
.cartao-decisao { border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 16px; margin: 12px 0; background: var(--surface2); }
.cartao-decisao dt { color: var(--gold-light); font-weight: 600; margin-top: 6px; }
.cartao-decisao dd { margin: 2px 0 0; }