/* Quantum Academy — tema unico, mobile-first */

:root {
  color-scheme: light dark;

  --bg:          #fbfaf8;
  --bg-raised:   #ffffff;
  --bg-sunken:   #f2f0ec;
  --bg-code:     #f5f3ef;
  --border:      #e2ddd4;
  --border-firm: #cfc8bb;

  --ink:         #1c1a17;
  --ink-soft:    #55504a;
  --ink-faint:   #8a837a;

  --accent:      #6b4ee6;
  --accent-soft: #efeaff;
  --accent-ink:  #4a32b8;

  --ket:         #0f766e;
  --bra:         #b45309;
  --ok:          #15803d;
  --warn:        #b45309;
  --bad:         #b91c1c;

  --ff-text: ui-serif, Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  --ff-ui:   ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --ff-mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;

  --measure: 34rem;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(28, 26, 23, .06), 0 4px 12px rgba(28, 26, 23, .04);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-tema="claro"]) {
    --bg:          #14131a;
    --bg-raised:   #1c1b24;
    --bg-sunken:   #100f15;
    --bg-code:     #21202a;
    --border:      #2e2c3a;
    --border-firm: #423f52;

    --ink:         #ece9f3;
    --ink-soft:    #a8a3b8;
    --ink-faint:   #726d82;

    --accent:      #a48bff;
    --accent-soft: #262038;
    --accent-ink:  #c4b3ff;

    --ket:         #4fd1c5;
    --bra:         #fbbf24;
    --ok:          #4ade80;
    --warn:        #fbbf24;
    --bad:         #f87171;

    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 4px 16px rgba(0, 0, 0, .3);
  }
}

:root[data-tema="escuro"] {
  --bg:          #14131a;
  --bg-raised:   #1c1b24;
  --bg-sunken:   #100f15;
  --bg-code:     #21202a;
  --border:      #2e2c3a;
  --border-firm: #423f52;

  --ink:         #ece9f3;
  --ink-soft:    #a8a3b8;
  --ink-faint:   #726d82;

  --accent:      #a48bff;
  --accent-soft: #262038;
  --accent-ink:  #c4b3ff;

  --ket:         #4fd1c5;
  --bra:         #fbbf24;
  --ok:          #4ade80;
  --warn:        #fbbf24;
  --bad:         #f87171;

  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 4px 16px rgba(0, 0, 0, .3);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow-x: hidden;
  max-width: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.68 var(--ff-text);
  overflow-wrap: break-word;
  overflow-x: hidden;
  max-width: 100%;
  width: 100%;
}

@media (min-width: 46rem) { body { font-size: 18px; } }

img, svg, canvas { max-width: 100%; }

a { color: var(--accent-ink); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent); }

/* ---------- barra de topo ---------- */

.topo {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: .75rem;
  padding: .55rem max(.9rem, env(safe-area-inset-left)) .55rem max(.9rem, env(safe-area-inset-right));
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.6) blur(10px);
  border-bottom: 1px solid var(--border);
  font-family: var(--ff-ui);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.topo__marca {
  font: 700 .95rem/1 var(--ff-ui);
  letter-spacing: -.02em;
  color: var(--ink);
  text-decoration: none;
  display: flex; align-items: center; gap: .45rem;
  flex: none;
}
.topo__marca span[aria-hidden] { font-size: 1.15rem; }

.topo__espaco { flex: 1; }

.topo__ligacoes { display: flex; gap: .2rem; align-items: center; }
.topo__ligacoes a {
  font: 600 .78rem/1 var(--ff-ui); color: var(--ink-soft);
  text-decoration: none; padding: .5rem .55rem; border-radius: 7px;
  white-space: nowrap;
}
.topo__ligacoes a:hover { background: var(--bg-sunken); color: var(--ink); }
.topo__ligacoes a[aria-current="page"] { color: var(--accent-ink); background: var(--accent-soft); }

@media (max-width: 48rem) {
  .topo {
    flex-wrap: wrap;
    row-gap: .35rem;
    column-gap: .5rem;
    padding: .45rem max(.75rem, env(safe-area-inset-left)) .45rem max(.75rem, env(safe-area-inset-right));
  }
  .topo__marca {
    font-size: .88rem;
  }
  .topo__espaco {
    display: none;
  }
  .topo__ligacoes {
    order: 3;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: .15rem 0 .25rem;
    margin: 0;
    gap: .25rem;
  }
  .topo__ligacoes::-webkit-scrollbar {
    display: none;
  }
  .topo__ligacoes a {
    flex: none;
    white-space: nowrap;
    padding: .4rem .55rem;
    font-size: .75rem;
  }
  .topo__btn-sync {
    flex: none;
    white-space: nowrap;
    padding: .35rem .55rem;
    font-size: .74rem;
  }
}

.botao-icone {
  appearance: none; border: 1px solid var(--border);
  background: var(--bg-raised); color: var(--ink-soft);
  width: 2.1rem; height: 2.1rem; border-radius: 8px;
  display: grid; place-items: center; cursor: pointer;
  font-size: .95rem; line-height: 1; flex: none;
}
.botao-icone:hover { border-color: var(--border-firm); color: var(--ink); }

/* ---------- barra de progresso de leitura ---------- */

.leitura {
  position: fixed; top: 0; left: 0; height: 2px; width: 0;
  background: var(--accent); z-index: 60; transition: width .1s linear;
}

/* ---------- layout ---------- */

.envolve {
  max-width: var(--measure);
  width: 100%;
  box-sizing: border-box;
  margin: 0 auto;
  padding: 1.5rem max(1.05rem, env(safe-area-inset-left)) 5rem max(1.05rem, env(safe-area-inset-right));
}
.envolve--largo { max-width: 76rem; width: 100%; }
.envolve--dashboard { max-width: 82rem; width: 100%; }
.envolve--revisao { max-width: 56rem; width: 100%; }

/* ---------- tipografia ---------- */

h1, h2, h3, h4 { font-family: var(--ff-ui); letter-spacing: -.022em; line-height: 1.2; }
h1 { font-size: clamp(1.65rem, 5.5vw, 2.3rem); font-weight: 700; margin: .2em 0 .35em; }
h2 { font-size: clamp(1.25rem, 4vw, 1.5rem); font-weight: 650; margin: 2.4em 0 .6em; }
h3 { font-size: 1.08rem; font-weight: 650; margin: 1.9em 0 .5em; }
h4 { font-size: .95rem; font-weight: 650; margin: 1.5em 0 .4em; color: var(--ink-soft); }

h2 + h3 { margin-top: 1rem; }

p { margin: 0 0 1.05em; }

.sobrescrito {
  font: 600 .72rem/1 var(--ff-ui);
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 .5rem;
}

.chamada {
  font-size: 1.06rem; line-height: 1.6; color: var(--ink-soft);
  margin: 0 0 2rem;
}

ul, ol { padding-left: 1.3em; margin: 0 0 1.1em; }
li { margin: .35em 0; }
li > ul, li > ol { margin: .35em 0; }

hr { border: 0; border-top: 1px solid var(--border); margin: 2.5rem 0; }

code {
  font: 500 .875em/1.5 var(--ff-mono);
  background: var(--bg-code); border: 1px solid var(--border);
  border-radius: 5px; padding: .08em .34em;
}

pre {
  background: var(--bg-code); border: 1px solid var(--border);
  border-radius: var(--radius); padding: .9rem 1rem;
  overflow-x: auto; margin: 0 0 1.2em;
  font: 500 .82rem/1.6 var(--ff-mono);
  -webkit-overflow-scrolling: touch;
}
pre code { background: none; border: 0; padding: 0; font-size: inherit; }

.ket { color: var(--ket); font-family: var(--ff-mono); white-space: nowrap; }
.bra { color: var(--bra); font-family: var(--ff-mono); white-space: nowrap; }

/* ---------- KaTeX ---------- */

.katex { font-size: 1.03em; }
.katex-display {
  overflow-x: auto; overflow-y: hidden;
  padding: .55rem .2rem .75rem; margin: 1.1em 0;
  -webkit-overflow-scrolling: touch;
}
.katex-display > .katex { text-align: center; }

/* ---------- caixas ---------- */

.caixa {
  border: 1px solid var(--border); border-left: 3px solid var(--border-firm);
  background: var(--bg-raised); border-radius: 0 var(--radius) var(--radius) 0;
  padding: .95rem 1.05rem; margin: 1.5rem 0;
  font-size: .95rem;
}
.caixa > :last-child { margin-bottom: 0; }
.caixa__rotulo {
  font: 650 .68rem/1 var(--ff-ui); letter-spacing: .09em;
  text-transform: uppercase; color: var(--ink-faint);
  margin: 0 0 .5rem; display: block;
}

.caixa--nota    { border-left-color: var(--accent); }
.caixa--nota    .caixa__rotulo { color: var(--accent); }
.caixa--aviso   { border-left-color: var(--warn); }
.caixa--aviso   .caixa__rotulo { color: var(--warn); }
.caixa--mito    { border-left-color: var(--bad); }
.caixa--mito    .caixa__rotulo { color: var(--bad); }
.caixa--chave   { border-left-color: var(--ok); background: var(--bg-sunken); }
.caixa--chave   .caixa__rotulo { color: var(--ok); }

/* ---------- objetivos do modulo ---------- */

.objetivos {
  background: var(--bg-sunken); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem 1.1rem; margin: 0 0 2rem;
  font-family: var(--ff-ui); font-size: .92rem;
}
.objetivos ul { margin: 0; padding-left: 1.15em; }
.objetivos li { margin: .3em 0; color: var(--ink-soft); }
.objetivos .caixa__rotulo { margin-bottom: .55rem; }

/* ---------- tabelas ---------- */

.tabela-envolve { overflow-x: auto; margin: 1.4rem 0; -webkit-overflow-scrolling: touch; max-width: 100%; }
table {
  border-collapse: collapse; width: 100%; max-width: 100%;
  display: block; overflow-x: auto; -webkit-overflow-scrolling: touch;
  font-family: var(--ff-ui); font-size: .88rem;
}
th, td { text-align: left; padding: .5rem .65rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-weight: 650; color: var(--ink-soft); font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; }
tbody tr:last-child td { border-bottom: 0; }

.katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  max-width: 100%;
  -webkit-overflow-scrolling: touch;
  padding: .25rem 0;
}
pre {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
code {
  word-break: break-word;
}
pre code {
  word-break: normal;
  white-space: pre;
}

/* ---------- widget de circuito ---------- */

.circuito {
  border: 1px solid var(--border); background: var(--bg-raised);
  border-radius: var(--radius); margin: 1.6rem 0; overflow: hidden;
  font-family: var(--ff-ui); box-shadow: var(--shadow);
}
.circuito__cabeca {
  display: flex; align-items: center; gap: .5rem;
  padding: .55rem .8rem; border-bottom: 1px solid var(--border);
  background: var(--bg-sunken);
  font: 650 .72rem/1.3 var(--ff-ui); letter-spacing: .07em; text-transform: uppercase;
  color: var(--ink-faint);
}
.circuito__corpo { padding: .8rem; }
.circuito__tela { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.circuito__tela svg { display: block; }
.circuito__saida { margin-top: .8rem; }

.barras { display: grid; gap: .3rem; font: 500 .76rem/1.3 var(--ff-mono); }
.barra { display: grid; grid-template-columns: 4.4em 1fr 3.6em; align-items: center; gap: .5rem; }
.barra__rotulo { color: var(--ket); }
.barra__trilho { background: var(--bg-sunken); border-radius: 3px; height: .62rem; overflow: hidden; }
.barra__cheia { background: var(--accent); height: 100%; border-radius: 3px; transition: width .25s ease; }
.barra__valor { text-align: right; color: var(--ink-faint); font-size: .72rem; }

.amplitudes {
  font: 500 .74rem/1.6 var(--ff-mono); color: var(--ink-soft);
  margin-top: .7rem; padding-top: .7rem; border-top: 1px dashed var(--border);
  overflow-x: auto; white-space: pre;
}

.circuito__acoes { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .8rem; }
.circuito__aviso { color: var(--bad); font: 500 .82rem/1.5 var(--ff-ui); }

.botao {
  appearance: none; cursor: pointer;
  font: 600 .78rem/1 var(--ff-ui);
  padding: .5rem .8rem; border-radius: 7px;
  border: 1px solid var(--border-firm); background: var(--bg-raised); color: var(--ink);
}
.botao:hover { border-color: var(--accent); color: var(--accent-ink); }
.botao--forte { background: var(--accent); border-color: var(--accent); color: #fff; }
.botao--forte:hover { filter: brightness(1.08); color: #fff; }
.botao:disabled { opacity: .45; cursor: not-allowed; }

/* ---------- esfera de Bloch ---------- */

.bloch { display: grid; gap: .8rem; justify-items: center; }
.bloch canvas { touch-action: none; cursor: grab; }
.bloch__lidos { font: 500 .76rem/1.7 var(--ff-mono); color: var(--ink-soft); text-align: center; }
.bloch__acoes { display: flex; flex-wrap: wrap; gap: .4rem; justify-content: center; }

/* ---------- quiz ---------- */

.quiz {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-raised); box-shadow: var(--shadow);
  margin: 2.5rem 0; overflow: hidden; font-family: var(--ff-ui);
}
.quiz__cabeca {
  padding: .7rem .95rem; border-bottom: 1px solid var(--border);
  background: var(--bg-sunken);
  display: flex; align-items: center; gap: .6rem;
  font: 650 .72rem/1 var(--ff-ui); letter-spacing: .07em; text-transform: uppercase; color: var(--ink-faint);
}
.quiz__conta { margin-left: auto; font-variant-numeric: tabular-nums; letter-spacing: 0; text-transform: none; }
.quiz__corpo { padding: 1rem .95rem; }
.quiz__pergunta { font: 600 1rem/1.5 var(--ff-ui); margin: 0 0 .9rem; color: var(--ink); }
.quiz__opcoes { display: grid; gap: .45rem; }

.opcao {
  display: flex; gap: .6rem; align-items: flex-start;
  text-align: left; width: 100%; cursor: pointer;
  padding: .65rem .75rem; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg);
  font: 400 .9rem/1.45 var(--ff-ui); color: var(--ink);
}
.opcao:hover:not(:disabled) { border-color: var(--accent); background: var(--accent-soft); }
.opcao__letra {
  flex: none; width: 1.35rem; height: 1.35rem; border-radius: 5px;
  background: var(--bg-sunken); color: var(--ink-faint);
  display: grid; place-items: center; font: 650 .72rem/1 var(--ff-ui);
}
.opcao[data-estado="certa"]  { border-color: var(--ok);  background: color-mix(in srgb, var(--ok) 12%, var(--bg)); }
.opcao[data-estado="certa"]  .opcao__letra { background: var(--ok); color: #fff; }
.opcao[data-estado="errada"] { border-color: var(--bad); background: color-mix(in srgb, var(--bad) 12%, var(--bg)); }
.opcao[data-estado="errada"] .opcao__letra { background: var(--bad); color: #fff; }
.opcao:disabled { cursor: default; }

.quiz__explicacao {
  margin-top: .9rem; padding: .75rem .85rem; border-radius: 8px;
  background: var(--bg-sunken); border: 1px solid var(--border);
  font: 400 .88rem/1.55 var(--ff-ui); color: var(--ink-soft);
}
.quiz__explicacao strong { color: var(--ink); }
.quiz__rodape { display: flex; gap: .5rem; align-items: center; margin-top: .9rem; }
.quiz__resultado { padding: 1.4rem .95rem; text-align: center; font-family: var(--ff-ui); }
.quiz__nota { font: 700 2.2rem/1 var(--ff-ui); color: var(--accent); font-variant-numeric: tabular-nums; }
.quiz__dizer { font: 400 .9rem/1.55 var(--ff-ui); color: var(--ink-soft); margin: .6rem 0 1rem; }

/* ---------- mapa do curso ---------- */

.fase { margin: 2.5rem 0 0; }
.fase__nome {
  font: 650 .7rem/1 var(--ff-ui); letter-spacing: .11em; text-transform: uppercase;
  color: var(--ink-faint); margin: 0 0 .85rem;
  display: flex; align-items: center; gap: .7rem;
}
.fase__nome::after { content: ""; flex: 1; height: 1px; background: var(--border); }

.modulos { display: grid; gap: .55rem; }
@media (min-width: 44rem) {
  .modulos { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; }
}

.modulo {
  display: grid; grid-template-columns: 2.3rem 1fr auto; align-items: center; gap: .85rem;
  padding: .8rem .9rem; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-raised); text-decoration: none; color: inherit;
  font-family: var(--ff-ui); box-shadow: var(--shadow);
  transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease;
}
.modulo:hover {
  border-color: var(--accent);
  color: inherit;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, .08);
}
.modulo__num {
  font: 700 .95rem/1 var(--ff-mono); color: var(--ink-faint);
  background: var(--bg-sunken); border-radius: 7px; padding: .5rem 0; text-align: center;
}
.modulo__titulo { font: 650 .96rem/1.3 var(--ff-ui); }
.modulo__resumo { font: 400 .8rem/1.4 var(--ff-ui); color: var(--ink-faint); margin-top: .12rem; }
.modulo__marca { font-size: .95rem; color: var(--ink-faint); }
.modulo[data-lido="sim"] .modulo__num { background: var(--accent); color: #fff; }
.modulo[data-lido="sim"] .modulo__marca { color: var(--ok); }

/* ---------- progresso global ---------- */

.progresso {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-raised); padding: 1rem 1.1rem; margin: 2rem 0 0;
  font-family: var(--ff-ui); box-shadow: var(--shadow);
}
.progresso__linha { display: flex; align-items: baseline; gap: .5rem; margin-bottom: .6rem; }
.progresso__n { font: 700 1.5rem/1 var(--ff-ui); color: var(--accent); font-variant-numeric: tabular-nums; }
.progresso__t { font: 400 .85rem/1.35 var(--ff-ui); color: var(--ink-faint); }
.progresso__trilho { background: var(--bg-sunken); border-radius: 4px; height: .5rem; overflow: hidden; }
.progresso__cheia { background: var(--accent); height: 100%; border-radius: 4px; transition: width .4s ease; }
.progresso__acoes { margin-top: .85rem; display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.progresso__revisao { font: 500 .8rem/1.4 var(--ff-ui); color: var(--ink-soft); }

.procura {
  width: 100%;
  padding: .75rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--ink);
  font: 400 .95rem/1.4 var(--ff-ui);
  box-shadow: var(--shadow);
  margin-bottom: 1.25rem;
  box-sizing: border-box;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.procura:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* ---------- recursos ---------- */

.filtros { display: flex; flex-wrap: wrap; gap: .45rem; margin: 0 0 1.6rem; }
.filtro {
  appearance: none; cursor: pointer; font: 600 .76rem/1 var(--ff-ui);
  padding: .45rem .8rem; border-radius: 99px;
  border: 1px solid var(--border); background: var(--bg-raised); color: var(--ink-soft);
  transition: all .15s ease;
}
.filtro:hover { border-color: var(--accent); color: var(--ink); }
.filtro[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }

.recursos { display: grid; gap: 1rem; }
@media (min-width: 48rem) {
  .recursos { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.15rem; }
}
@media (min-width: 78rem) {
  .recursos { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
}

.recurso {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-raised); padding: 1.1rem 1.2rem;
  font-family: var(--ff-ui); box-shadow: var(--shadow);
  display: flex; flex-direction: column;
  transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease;
}
.recurso:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 6px 18px rgba(0, 0, 0, .08);
}
.recurso__topo { display: flex; align-items: baseline; gap: .5rem; flex-wrap: wrap; margin-bottom: .2rem; }
.recurso__titulo { font: 700 1.02rem/1.35 var(--ff-ui); margin: 0; }
.recurso__titulo a { color: var(--ink); text-decoration: none; }
.recurso__titulo a:hover { color: var(--accent-ink); text-decoration: underline; }
.recurso__autor { font: 400 .82rem/1.35 var(--ff-ui); color: var(--ink-faint); }
.recurso__porque { font: 400 .88rem/1.55 var(--ff-ui); color: var(--ink-soft); margin: .45rem 0 .9rem; flex: 1; }
.recurso__meta { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: auto; }

.etiqueta {
  font: 600 .68rem/1 var(--ff-ui); letter-spacing: .03em;
  padding: .3rem .55rem; border-radius: 6px;
  background: var(--bg-sunken); color: var(--ink-faint); border: 1px solid var(--border);
}
.etiqueta--nivel { background: var(--accent-soft); color: var(--accent-ink); border-color: transparent; }
.etiqueta--gratis { color: var(--ok); }

/* ---------- experts ---------- */

.experts { display: grid; gap: 1rem; }
@media (min-width: 48rem) {
  .experts { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.2rem; }
}
@media (min-width: 78rem) {
  .experts { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.35rem; }
}
.expert {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-raised); padding: 1.15rem 1.25rem;
  font-family: var(--ff-ui); box-shadow: var(--shadow);
  display: flex; flex-direction: column;
  transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease;
}
.expert:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 6px 18px rgba(0, 0, 0, .08);
}
.expert__nome { font: 700 1.08rem/1.3 var(--ff-ui); margin: 0 0 .15rem; }
.expert__papel { font: 600 .82rem/1.4 var(--ff-ui); color: var(--accent); margin: 0 0 .6rem; }
.expert__porque { font: 400 .88rem/1.6 var(--ff-ui); color: var(--ink-soft); margin: 0 0 .9rem; flex: 1; }
.expert__ligacoes { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: auto; }
.expert__ligacoes a {
  font: 600 .75rem/1 var(--ff-ui); padding: .4rem .65rem; border-radius: 6px;
  background: var(--bg-sunken); border: 1px solid var(--border);
  color: var(--ink-soft); text-decoration: none;
  transition: all .12s ease;
}
.expert__ligacoes a:hover { border-color: var(--accent); color: var(--accent-ink); background: var(--accent-soft); }

/* ---------- glossario ---------- */

.glossario-letras {
  display: flex; flex-wrap: wrap; gap: .3rem; margin: 0 0 1.2rem;
}
.glossario-letra {
  appearance: none; cursor: pointer;
  font: 700 .72rem/1 var(--ff-mono);
  padding: .35rem .5rem; border-radius: 5px;
  border: 1px solid var(--border); background: var(--bg-raised); color: var(--ink-soft);
}
.glossario-letra:hover { border-color: var(--accent); color: var(--ink); }
.glossario-letra[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }

.glossario { display: grid; gap: .8rem; }
@media (min-width: 48rem) {
  .glossario {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }
}
@media (min-width: 80rem) {
  .glossario {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.15rem;
  }
}

.termo {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-raised); padding: 1rem 1.15rem;
  font-family: var(--ff-ui); box-shadow: var(--shadow);
  display: flex; flex-direction: column;
  transition: transform .14s ease, border-color .14s ease;
}
.termo:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}
.termo__pt { font: 700 1rem/1.3 var(--ff-ui); }
.termo__en {
  font: 600 .78rem/1.3 var(--ff-mono); color: var(--accent);
  background: var(--accent-soft); padding: .15rem .4rem; border-radius: 4px;
  display: inline-block; margin-top: .25rem;
}
.termo__def { font: 400 .87rem/1.58 var(--ff-ui); color: var(--ink-soft); margin: .6rem 0 0; flex: 1; }

.envolve--revisao {
  max-width: 56rem;
  margin: 0 auto;
}

/* ---------- navegacao entre modulos ---------- */

.passos {
  display: grid; gap: .6rem; margin: 3rem 0 0;
  padding-top: 1.5rem; border-top: 1px solid var(--border);
}
@media (min-width: 34rem) { .passos { grid-template-columns: 1fr 1fr; } }

.passo {
  display: block; padding: .85rem .95rem; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--bg-raised);
  text-decoration: none; color: inherit; font-family: var(--ff-ui);
}
.passo:hover { border-color: var(--accent); color: inherit; }
.passo__dir { font: 600 .68rem/1 var(--ff-ui); letter-spacing: .09em; text-transform: uppercase; color: var(--ink-faint); }
.passo__nome { font: 650 .93rem/1.35 var(--ff-ui); margin-top: .3rem; display: block; }
.passo--seguinte { text-align: right; }

/* ---------- ler a seguir ---------- */

.fontes { display: grid; gap: .5rem; margin: 1rem 0 0; }
@media (min-width: 36rem) {
  .fontes { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .7rem; }
}
@media (min-width: 60rem) {
  .fontes--grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .85rem; }
}
.fonte {
  display: block; padding: .7rem .85rem; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg-raised);
  text-decoration: none; font-family: var(--ff-ui);
}
.fonte:hover { border-color: var(--accent); }
.fonte__t { font: 650 .88rem/1.35 var(--ff-ui); color: var(--ink); display: block; }
.fonte__d { font: 400 .78rem/1.45 var(--ff-ui); color: var(--ink-faint); margin-top: .15rem; display: block; }

/* ---------- rodape ---------- */

.rodape {
  border-top: 1px solid var(--border); margin-top: 4rem; padding: 1.5rem 0 0;
  font: 400 .78rem/1.6 var(--ff-ui); color: var(--ink-faint);
}
.rodape a { color: var(--ink-soft); }

/* ---------- utilitarios ---------- */

.ecra-leitor {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.centro { text-align: center; }
[hidden] { display: none !important; }

/* ---------- dinâmicas de desktop & responsividade ---------- */

.layout-desktop {
  display: block;
}
@media (min-width: 62rem) {
  .layout-desktop {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 21.5rem;
    gap: 2.5rem;
    align-items: start;
  }
}

.cockpit-lateral {
  margin-top: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}
@media (min-width: 62rem) {
  .cockpit-lateral {
    position: sticky;
    top: 4.2rem;
    margin-top: 0;
  }
}

.cockpit-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-raised);
  padding: 1.15rem 1.25rem;
  box-shadow: var(--shadow);
  font-family: var(--ff-ui);
}
.cockpit-card--destaque {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-raised));
}
.cockpit-card__etiqueta {
  font: 700 .68rem/1 var(--ff-ui);
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.cockpit-card__titulo {
  font: 700 1.05rem/1.3 var(--ff-ui);
  margin: 0 0 .35rem;
  color: var(--ink);
}
.cockpit-card__sub {
  font: 400 .82rem/1.45 var(--ff-ui);
  color: var(--ink-soft);
  margin: 0 0 .9rem;
}
.cockpit-card__acoes {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}
.cockpit-meta-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .45rem 0;
  border-bottom: 1px solid var(--border);
  font-size: .84rem;
}
.cockpit-meta-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.cockpit-meta-item__valor {
  font-weight: 650;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.tecla-atalho {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  height: 1.4rem;
  font-family: var(--ff-mono);
  font-size: .75rem;
  padding: 0 .4rem;
  background: var(--bg-sunken);
  border: 1px solid var(--border-firm);
  border-radius: 4px;
  color: var(--ink-soft);
  box-shadow: 0 1px 0 rgba(0, 0, 0, .15);
}

/* ---------- guia inicial do método (onboarding) ---------- */

.guia-metodo {
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  background: var(--bg-raised);
  padding: 1.35rem 1.4rem 1.5rem;
  margin: 1.6rem 0 2.2rem;
  box-shadow: var(--shadow);
  font-family: var(--ff-ui);
}
.guia-metodo__topo {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: .45rem;
}
.guia-metodo__titulo {
  font: 700 1.22rem/1.3 var(--ff-ui);
  margin: 0;
  color: var(--ink);
}
.guia-metodo__sub {
  font: 400 .93rem/1.55 var(--ff-ui);
  color: var(--ink-soft);
  margin: 0 0 1.25rem;
}
.guia-passos {
  display: grid;
  gap: .85rem;
  margin-bottom: 1.25rem;
}
@media (min-width: 44rem) {
  .guia-passos {
    grid-template-columns: 1fr 1fr;
    gap: .95rem;
  }
}
.guia-passo {
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .95rem 1rem;
  display: flex;
  gap: .85rem;
  align-items: flex-start;
}
.guia-passo__num {
  width: 1.65rem;
  height: 1.65rem;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font: 700 .82rem/1 var(--ff-ui);
  flex: none;
}
.guia-passo__conteudo h3 {
  margin: 0 0 .28rem;
  font-size: .92rem;
  color: var(--ink);
}
.guia-passo__conteudo p {
  margin: 0;
  font-size: .82rem;
  line-height: 1.46;
  color: var(--ink-soft);
}
.guia-rodape-acoes {
  display: flex;
  gap: .75rem;
  align-items: center;
  flex-wrap: wrap;
  padding-top: .95rem;
  border-top: 1px solid var(--border);
}
.guia-ritmo-tag {
  font-size: .8rem;
  color: var(--ink-faint);
  margin-left: auto;
}

/* ---------- laboratório split workbench ---------- */

.lab-split {
  display: grid;
  gap: 1.6rem;
}
@media (min-width: 60rem) {
  .lab-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    align-items: start;
    gap: 2rem;
  }
  .lab-split__col-fixa {
    position: sticky;
    top: 4.2rem;
  }
}

/* ---------- barra de topo aprimorada ---------- */

.topo__modulo-info {
  display: none;
  font: 600 .82rem/1 var(--ff-ui);
  color: var(--ink);
  background: var(--bg-sunken);
  padding: .35rem .75rem;
  border-radius: 99px;
  border: 1px solid var(--border);
  max-width: 25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
@media (min-width: 52rem) {
  .topo__modulo-info {
    display: inline-flex;
    align-items: center;
  }
}

.topo__pill {
  font: 650 .75rem/1 var(--ff-ui);
  color: var(--accent-ink) !important;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  padding: .35rem .65rem;
  border-radius: 99px;
  display: none;
  align-items: center;
  gap: .3rem;
  text-decoration: none;
}
@media (min-width: 48rem) {
  .topo__pill {
    display: inline-flex;
  }
}

/* ---------- leitor desktop: navegação de curso + artigo + sumário ---------- */

.leitor-desktop-layout {
  display: block;
  width: 100%;
}

.leitor-sidebar-modulos {
  display: none;
}

.leitor-artigo {
  width: 100%;
  min-width: 0;
  max-width: var(--measure);
  margin: 0 auto;
}

.leitor-sidebar-sumario {
  display: none;
}

@media (min-width: 68rem) {
  .envolve--leitor-desktop {
    max-width: 95vw;
    width: 95vw;
    margin: 0 auto;
    padding: 1.5rem 1.5rem 5rem;
  }

  .leitor-desktop-layout {
    display: grid;
    grid-template-columns: 18.5rem minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
  }

  .leitor-sidebar-modulos {
    display: block;
    position: sticky;
    top: 4.5rem;
    max-height: calc(100vh - 6rem);
    overflow-y: auto;
    font-family: var(--ff-ui);
    padding-right: .85rem;
    scrollbar-width: thin;
    border-right: 1px solid var(--border);
  }

  .leitor-artigo {
    max-width: 50rem;
    margin: 0;
  }
}

@media (min-width: 90rem) {
  .leitor-desktop-layout {
    grid-template-columns: 19rem minmax(0, 52rem) 18rem;
    gap: 3.2rem;
    justify-content: center;
  }

  .leitor-sidebar-sumario {
    display: block;
    position: sticky;
    top: 4.5rem;
    max-height: calc(100vh - 6rem);
    overflow-y: auto;
    font-family: var(--ff-ui);
    padding-left: .75rem;
    scrollbar-width: thin;
    border-left: 1px solid var(--border);
  }
}

.leitor-sidebar__cabeca {
  padding-bottom: .75rem;
  margin-bottom: .85rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.leitor-sidebar__tit {
  font: 700 .76rem/1 var(--ff-ui);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0;
}

.leitor-fase {
  margin-bottom: 1.25rem;
}

.leitor-fase__nome {
  font: 700 .68rem/1 var(--ff-ui);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 .5rem;
  padding-left: .25rem;
}

.leitor-modulo-link {
  display: grid;
  grid-template-columns: 2rem 1fr auto;
  align-items: center;
  gap: .55rem;
  padding: .45rem .55rem;
  border-radius: 7px;
  text-decoration: none;
  color: var(--ink-soft);
  font-family: var(--ff-ui);
  transition: background .12s ease, color .12s ease;
  margin-bottom: .2rem;
}

.leitor-modulo-link:hover {
  background: var(--bg-sunken);
  color: var(--ink);
}

.leitor-modulo-link.ativo {
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-weight: 650;
}

.leitor-modulo-num {
  font: 700 .8rem/1 var(--ff-mono);
  background: var(--bg-sunken);
  padding: .3rem 0;
  text-align: center;
  border-radius: 4px;
  color: var(--ink-faint);
}
.leitor-modulo-link.ativo .leitor-modulo-num {
  background: var(--accent);
  color: #fff;
}

.leitor-modulo-tit {
  font-size: .83rem;
  line-height: 1.3;
  display: block;
}

.leitor-modulo-min {
  font-size: .7rem;
  color: var(--ink-faint);
  display: block;
}

.leitor-modulo-badge {
  font-size: .75rem;
  font-weight: 650;
  color: var(--ok);
}

.sumario-link {
  font-size: .82rem;
  color: var(--ink-soft);
  text-decoration: none;
  padding: .35rem .6rem;
  border-radius: 6px;
  display: block;
  line-height: 1.35;
  border-left: 2px solid transparent;
  transition: all .15s ease;
}

.sumario-link:hover {
  background: var(--bg-sunken);
  color: var(--ink);
}

.sumario-link.ativo {
  color: var(--accent-ink);
  background: var(--accent-soft);
  border-left-color: var(--accent);
  font-weight: 600;
}

.sumario-acoes {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

/* ---------- sincronização multi-dispositivo ---------- */

.topo__btn-sync {
  font: 600 .76rem/1 var(--ff-ui);
  padding: .35rem .65rem;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--bg-sunken);
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  cursor: pointer;
  transition: all .15s ease;
}
.topo__btn-sync:hover {
  border-color: var(--accent);
  color: var(--accent-ink);
  background: var(--accent-soft);
}

.sync-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink-faint);
  display: inline-block;
}
.sync-dot--ativo {
  background: var(--ok);
  box-shadow: 0 0 6px var(--ok);
}

/* Modal de Sincronização */
.modal-cortina {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .55);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}
.modal-janela {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: min(32rem, calc(100vw - 2rem));
  width: 100%;
  box-sizing: border-box;
  box-shadow: 0 16px 36px rgba(0, 0, 0, .25);
  padding: 1.4rem 1.25rem;
  font-family: var(--ff-ui);
  position: relative;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-fechar {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: transparent;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--ink-faint);
  padding: .2rem .5rem;
  border-radius: 4px;
}
.modal-fechar:hover {
  color: var(--ink);
  background: var(--bg-sunken);
}
.sync-qrcode-caixa {
  background: #fff;
  padding: .65rem;
  border-radius: 8px;
  display: inline-block;
  margin: .85rem auto;
  box-shadow: var(--shadow);
  max-width: 100%;
  box-sizing: border-box;
}
.sync-qrcode-caixa canvas,
.sync-qrcode-caixa img {
  max-width: 100% !important;
  height: auto !important;
  display: block;
}
.sync-chave-badge {
  font: 700 1.2rem/1 var(--ff-mono);
  letter-spacing: .08em;
  background: var(--accent-soft);
  color: var(--accent-ink);
  padding: .55rem .85rem;
  border-radius: 6px;
  border: 1px dashed var(--accent);
  display: inline-block;
  max-width: 100%;
  word-break: break-all;
  box-sizing: border-box;
}