/* Layout: capítulos com trilho de navegação; linha do tempo espelhada (Brasil | Aristóteles) sobre um eixo central */
:root {
  --bg: #f3f5f1;
  --surface: #ffffff;
  --ink: #17211d;
  --muted: #56645e;
  --line: #d5ddd7;
  --accent: #0e6b58;        /* verde-petróleo: economia real, produção */
  --accent-soft: #e0efe9;
  --ochre: #9a6a12;         /* ocre: a lente de Aristóteles */
  --ochre-soft: #f6ecd6;
  --warn: #a4372a;
  --font-display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --font-body: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-data: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --step--1: 0.86rem;
  --step-0: 1.06rem;
  --step-1: 1.3rem;
  --step-2: 1.7rem;
  --step-3: 2.3rem;
  --step-4: clamp(2.2rem, 5vw, 3.4rem);
  --radius: 6px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #101614; --surface: #171f1c; --ink: #e4ebe7; --muted: #9aaba3; --line: #2b3833;
    --accent: #56c7a9; --accent-soft: #173a31; --ochre: #e0b252; --ochre-soft: #33290f; --warn: #ef8a7b;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #101614; --surface: #171f1c; --ink: #e4ebe7; --muted: #9aaba3; --line: #2b3833;
  --accent: #56c7a9; --accent-soft: #173a31; --ochre: #e0b252; --ochre-soft: #33290f; --warn: #ef8a7b;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--font-body); font-size: var(--step-0); line-height: 1.62;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid var(--ochre); outline-offset: 2px; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; text-wrap: balance; letter-spacing: -0.01em; }
h1 { font-size: var(--step-4); margin: 0 0 0.6rem; font-weight: 700; }
h2 { font-size: var(--step-2); margin: 2.6rem 0 0.8rem; font-weight: 650; }
h3 { font-size: var(--step-1); margin: 1.8rem 0 0.5rem; font-weight: 600; }
p, li { max-width: 68ch; }
strong { font-weight: 650; }
.num, table { font-variant-numeric: tabular-nums; }

/* Cabeçalho */
.topo {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(6px); border-bottom: 1px solid var(--line);
}
.topo-in { max-width: 1180px; margin: 0 auto; padding: 0.7rem 16px; display: flex; align-items: center; gap: 1rem; }
.tema { flex-shrink: 0; }
.marca { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; color: var(--ink); text-decoration: none; display: flex; align-items: baseline; gap: 0.4rem; }
.marca span { font-family: var(--font-data); font-size: 0.72rem; color: var(--ochre); letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500; }
.menu { display: flex; gap: 0.2rem 0.85rem; flex-wrap: wrap; justify-content: flex-end; margin-left: auto; font-family: var(--font-display); font-size: 0.9rem; }
.menu a { color: var(--muted); text-decoration: none; padding: 0.2rem 0; border-bottom: 2px solid transparent; }
.menu a:hover { color: var(--ink); }
.menu a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }
.tema { font: inherit; font-family: var(--font-data); font-size: 0.75rem; background: transparent; color: var(--muted); border: 1px solid var(--line); border-radius: 99px; padding: 0.25rem 0.7rem; cursor: pointer; }
@media (max-width: 760px) {
  .topo-in { flex-wrap: wrap; }
  .menu { order: 3; width: 100%; margin-left: 0; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 0.3rem; }
  .menu a { white-space: nowrap; }
  .tema { margin-left: auto; }
}

/* Página */
.pagina { max-width: 1180px; margin: 0 auto; padding-inline: 16px; padding-block: 2rem 4rem; display: grid; grid-template-columns: minmax(0, 1fr) 240px; gap: 3rem; }
.pagina > main { min-width: 0; }
@media (max-width: 960px) { .pagina { grid-template-columns: minmax(0, 1fr); } .trilho { display: none; } }
.olho { font-family: var(--font-data); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ochre); margin: 0 0 0.6rem; }
.lead { font-size: var(--step-1); line-height: 1.5; color: var(--ink); max-width: 60ch; }
.trilho { position: sticky; top: 5rem; align-self: start; font-family: var(--font-display); font-size: 0.9rem; border-left: 1px solid var(--line); padding-left: 1rem; }
.trilho p { font-family: var(--font-data); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin: 0 0 0.6rem; }
.trilho ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.45rem; }
.trilho a { color: var(--muted); text-decoration: none; }
.trilho a:hover { color: var(--accent); }

/* Blocos */
.tese { border-left: 4px solid var(--accent); background: var(--accent-soft); padding: 1.1rem 1.3rem; margin: 1.6rem 0; font-family: var(--font-display); font-size: var(--step-1); line-height: 1.35; font-weight: 600; max-width: 62ch; }
.lente { background: var(--ochre-soft); border-top: 2px solid var(--ochre); padding: 1rem 1.2rem; margin: 1.2rem 0; }
.lente .rotulo { font-family: var(--font-data); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ochre); margin: 0 0 0.3rem; }
.lente p { margin: 0.3rem 0; }
.nota { font-size: var(--step--1); color: var(--muted); }
.tabela { overflow-x: auto; margin: 1rem 0 1.4rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; padding: 0.6rem 0.8rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-family: var(--font-display); font-weight: 600; font-size: 0.88rem; background: color-mix(in srgb, var(--accent-soft) 55%, var(--surface)); }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-family: var(--font-data); font-size: 0.88rem; }

/* Números-chave (somente na página inicial e no mecanismo, onde os números são o ponto) */
.cifras { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1rem; margin: 1.6rem 0; }
.cifra { border-top: 2px solid var(--ink); padding-top: 0.6rem; }
.cifra b { display: block; font-family: var(--font-data); font-size: 1.7rem; font-weight: 500; letter-spacing: -0.02em; }
.cifra span { font-size: var(--step--1); color: var(--muted); }

/* Mapa de capítulos */
.mapa { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 0; border-top: 1px solid var(--line); margin: 1.4rem 0; }
.mapa a { display: grid; grid-template-columns: 2.4rem 1fr; gap: 0.2rem 0.6rem; padding: 1rem 0.8rem 1rem 0; border-bottom: 1px solid var(--line); text-decoration: none; color: var(--ink); }
.mapa a:hover h3 { color: var(--accent); }
.mapa .n { font-family: var(--font-data); color: var(--ochre); font-size: 0.85rem; padding-top: 0.2rem; grid-row: span 2; }
.mapa h3 { margin: 0; font-size: 1.08rem; }
.mapa p { margin: 0; font-size: 0.92rem; color: var(--muted); }

/* Linha do tempo espelhada */
.espelho-legenda { display: grid; grid-template-columns: 1fr 3.2rem 1fr; font-family: var(--font-data); font-size: 0.74rem; letter-spacing: 0.1em; text-transform: uppercase; margin: 2rem 0 0.6rem; }
.espelho-legenda span:first-child { color: var(--accent); text-align: right; }
.espelho-legenda span:last-child { color: var(--ochre); }
.periodo { display: grid; grid-template-columns: 1fr 3.2rem 1fr; align-items: start; }
.periodo .brasil { text-align: left; padding: 0 0 2.2rem; }
.periodo .eixo { position: relative; height: 100%; display: flex; justify-content: center; }
.periodo .eixo::before { content: ""; position: absolute; top: 0; bottom: 0; width: 2px; background: var(--line); }
.periodo .eixo span { position: relative; margin-top: 0.3rem; width: 0.9rem; height: 0.9rem; border-radius: 50%; background: var(--bg); border: 2px solid var(--accent); }
.periodo .grego { padding: 0 0 2.2rem; }
.periodo .datas { font-family: var(--font-data); font-size: 0.85rem; color: var(--accent); margin: 0; }
.periodo h3 { margin: 0.1rem 0 0.5rem; }
.periodo .grego h4 { font-size: 1rem; margin: 0.35rem 0 0.4rem; color: var(--ochre); }
.periodo ul { padding-left: 1.1rem; margin: 0.4rem 0; }
.periodo .licao { font-weight: 600; }
.periodo .grego > div { background: var(--ochre-soft); border-top: 2px solid var(--ochre); padding: 0.8rem 1rem; }
@media (max-width: 760px) {
  .espelho-legenda { display: none; }
  .periodo { grid-template-columns: 1.4rem 1fr; }
  .periodo .eixo { grid-row: span 2; grid-column: 1; }
  .periodo .brasil { grid-column: 2; padding-bottom: 0.8rem; }
  .periodo .grego { grid-column: 2; }
}

/* Conceitos de Aristóteles */
.conceitos { display: grid; gap: 1.4rem; margin: 1.4rem 0; }
.conceito { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 1.4rem; padding-top: 1.2rem; border-top: 1px solid var(--line); }
.conceito .termo { font-family: var(--font-data); color: var(--ochre); font-size: 0.8rem; letter-spacing: 0.06em; }
.conceito h3 { margin: 0.2rem 0 0.5rem; }
.conceito blockquote { margin: 0.6rem 0; padding-left: 0.9rem; border-left: 2px solid var(--ochre); font-style: italic; color: var(--muted); }
.conceito .hoje { background: var(--accent-soft); padding: 0.9rem 1rem; }
.conceito .hoje p:first-child { font-family: var(--font-data); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin: 0 0 0.3rem; }
@media (max-width: 760px) { .conceito { grid-template-columns: minmax(0, 1fr); } }

/* Gráficos e diagramas */
.figura { margin: 1.4rem 0; overflow-x: auto; }
.figura svg { display: block; width: 100%; min-width: 560px; height: auto; }
.figura figcaption { font-size: var(--step--1); color: var(--muted); margin-top: 0.4rem; }
.svg-texto { fill: var(--ink); font-family: var(--font-display); }
.svg-quieto { fill: var(--muted); font-family: var(--font-data); }
.svg-grade { stroke: var(--line); }
.svg-linha { stroke: var(--accent); fill: none; }
.svg-ponto { fill: var(--accent); }
.svg-caixa { fill: var(--surface); stroke: var(--line); }
.svg-caixa-forte { fill: var(--accent-soft); stroke: var(--accent); }
.svg-seta { stroke: var(--muted); fill: none; }

/* Frentes do remédio */
.frentes { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 1rem; margin: 1.4rem 0; }
.frente { border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; background: var(--surface); }
.frente h3 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.frente ul { margin: 0; padding-left: 1.1rem; font-size: 0.95rem; }

/* Biblioteca */
.filtros { display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; align-items: center; margin: 1rem 0; font-family: var(--font-display); font-size: 0.92rem; }
.filtros select, .filtros input { font: inherit; padding: 0.35rem 0.6rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); color: var(--ink); }
.livro-lido { width: 1.1rem; height: 1.1rem; accent-color: var(--accent); }
.contagem { font-family: var(--font-data); font-size: 0.85rem; color: var(--muted); }

/* Navegação entre capítulos */
.passos { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-top: 3rem; padding-top: 1.2rem; border-top: 1px solid var(--line); font-family: var(--font-display); }
.passos a { text-decoration: none; display: grid; }
.passos small { font-family: var(--font-data); color: var(--muted); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; }
.passos .prox { text-align: right; margin-left: auto; }
.rodape { border-top: 1px solid var(--line); padding-block: 1.6rem 2.4rem; padding-inline: 16px; }
.rodape p { max-width: 1180px; margin: 0 auto; font-size: var(--step--1); color: var(--muted); }
#circuito-svg .svg-quieto { font-family: var(--font-display); }

/* Logo animado da página inicial, sobre a cor da página */
.logo-home { margin: 0.5rem 0 1.6rem; }
.logo-home img { display: block; width: 100%; max-width: 420px; height: auto; }