/* Primeira Órbita — estilos do site.
   Layout: cabeçalho fixo translúcido sobre um céu desenhado em canvas; conteúdo em coluna central
   (até 1120 px), lições com sumário lateral e texto em ~68 caracteres por linha.
   Tema escuro (padrão): espaço profundo. Tema claro: carta celeste impressa (papel azulado, tinta azul-marinho). */

:root {
  /* tema escuro (padrão): espaço profundo */
  --bg: #060a16;
  --bg-soft: #0b1122;
  --card: rgba(16, 23, 44, 0.72);
  --ink: #ece6d6;
  --muted: #949bb1;
  --line: rgba(150, 168, 210, 0.18);
  --accent: #ffc35a;
  --accent-soft: rgba(255, 195, 90, 0.12);
  --accent-ink: #1a1204;
  --probe: #5fe0c2;
  --star: 236, 230, 214;      /* r, g, b das estrelas do fundo */
  --shadow: 0 14px 40px rgba(0, 0, 0, 0.35);
  --header: rgba(6, 10, 22, 0.78);

  --f-display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --f-body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --t-xs: 0.78rem; --t-sm: 0.88rem; --t-md: 1rem; --t-lg: 1.25rem; --t-xl: 1.7rem; --t-2xl: 2.4rem; --t-3xl: clamp(2.2rem, 5vw, 3.6rem);
  --gutter: 20px;
  --radius: 14px;
  color-scheme: dark;
}
/* Tema claro (carta celeste impressa): só aparece quando a pessoa escolhe "Claro" no seletor */
:root[data-theme="light"] {
  --bg: #e9eef6;
  --bg-soft: #f4f7fb;
  --card: rgba(255, 255, 255, 0.72);
  --ink: #14203b;
  --muted: #55607a;
  --line: rgba(20, 32, 59, 0.14);
  --accent: #9a5600;          /* ouro escurecido, legível sobre o papel */
  --accent-soft: rgba(154, 86, 0, 0.1);
  --accent-ink: #ffffff;
  --probe: #0f7a63;
  --star: 20, 32, 59;         /* r, g, b das estrelas do fundo */
  --shadow: 0 10px 30px rgba(20, 32, 59, 0.08);
  --header: rgba(233, 238, 246, 0.82);
  color-scheme: light;
}

/* Tema Lua: cinzas de rocha lunar levemente azulados e prata; céu negro (a Lua não tem atmosfera) */
:root[data-theme="lua"] {
  --bg: #111317; --bg-soft: #1a1d23; --card: rgba(30, 33, 40, 0.78);
  --ink: #e9eaed; --muted: #a3a8b4; --line: rgba(205, 210, 222, 0.16);
  --accent: #c3d2e6; --accent-soft: rgba(195, 210, 230, 0.12); --accent-ink: #111317;
  --probe: #8fd6c8; --star: 228, 231, 238; --shadow: 0 14px 40px rgba(0, 0, 0, 0.45);
  --header: rgba(17, 19, 23, 0.82);
  color-scheme: dark;
}
/* Tema Terra: azul-oceano profundo, ciano da atmosfera e verde-floresta */
:root[data-theme="terra"] {
  --bg: #03111f; --bg-soft: #071d33; --card: rgba(7, 34, 60, 0.74);
  --ink: #e7f2f8; --muted: #9db8ca; --line: rgba(150, 205, 235, 0.18);
  --accent: #5fd4ea; --accent-soft: rgba(95, 212, 234, 0.12); --accent-ink: #03111f;
  --probe: #7fdc8f; --star: 222, 236, 246; --shadow: 0 14px 40px rgba(0, 0, 0, 0.4);
  --header: rgba(3, 17, 31, 0.82);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 84px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 var(--t-md)/1.6 var(--f-body); -webkit-font-smoothing: antialiased; }
img, svg { max-width: 100%; }
[hidden] { display: none !important; }
a { color: var(--accent); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3, h4 { font-family: var(--f-display); line-height: 1.15; text-wrap: balance; margin: 0; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
.eyebrow { font: 500 var(--t-xs)/1 var(--f-body); text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted); }
.mono { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }

/* céu de fundo */
#ceu { position: fixed; inset: 0; width: 100%; height: 100%; z-index: -1; pointer-events: none; }

.wrap { max-width: 1120px; margin: 0 auto; padding-inline: var(--gutter); }

/* ---------- Cabeçalho ---------- */
.site-header { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: var(--header); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; gap: 16px; min-height: 64px; flex-wrap: wrap; padding-block: 8px; }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font: 700 1.1rem var(--f-display); white-space: nowrap; }
.logo svg { width: 30px; height: 30px; flex: none; }
.site-nav { display: flex; gap: 2px; flex-wrap: wrap; margin-left: auto; }
.site-nav a { color: var(--muted); text-decoration: none; font-weight: 500; font-size: var(--t-sm); padding: 7px 12px; border-radius: 999px; }
.site-nav a:hover { color: var(--ink); background: var(--accent-soft); }
.site-nav a[aria-current="page"] { color: var(--ink); background: var(--accent-soft); box-shadow: inset 0 0 0 1px var(--line); }
.theme-btn { display: inline-flex; align-items: center; gap: 6px; font: 500 var(--t-sm) var(--f-body); color: var(--ink); background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; cursor: pointer; }
.theme-btn svg { width: 16px; height: 16px; }
.theme-sel { display: inline-flex; align-items: center; gap: 6px; color: var(--ink); background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 0 10px 0 12px; }
.theme-sel:hover, .theme-sel:focus-within { border-color: var(--accent); }
.theme-sel svg { width: 16px; height: 16px; flex: none; }
.theme-sel select { font: 500 var(--t-sm) var(--f-body); color: var(--ink); background: transparent; border: 0; padding: 7px 2px; cursor: pointer; }
.theme-sel select:focus-visible { outline: none; }
.theme-sel option { color: #14203b; background: #fff; }
.theme-btn:hover { border-color: var(--accent); }

/* ---------- Rodapé ---------- */
.site-footer { border-top: 1px solid var(--line); margin-top: 72px; padding-block: 28px 40px; color: var(--muted); font-size: var(--t-sm); background: linear-gradient(transparent, var(--bg-soft)); }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 32px; justify-content: space-between; }
.site-footer p { margin: 0; max-width: 60ch; }

/* ---------- Blocos comuns ---------- */
main { display: block; }
.page-head { padding-block: 48px 24px; }
.page-head h1 { font-size: var(--t-2xl); margin-top: 10px; }
.page-head p { color: var(--muted); font-size: 1.08rem; max-width: 62ch; margin-top: 12px; }
.section { padding-block: 28px; }
.section > h2 { font-size: var(--t-xl); margin-bottom: 6px; }
.section > .sub { color: var(--muted); margin-bottom: 20px; max-width: 62ch; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }
.btn { display: inline-flex; align-items: center; gap: 8px; font: 500 var(--t-sm) var(--f-body); text-decoration: none; padding: 10px 18px; border-radius: 999px; border: 1px solid var(--line); color: var(--ink); background: var(--card); cursor: pointer; }
.btn:hover { border-color: var(--accent); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.06); }
.pill { display: inline-block; font: 500 0.7rem/1 var(--f-body); letter-spacing: 0.06em; text-transform: uppercase; padding: 5px 9px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); white-space: nowrap; }
.pill.on { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

/* ---------- Início ---------- */
.hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 32px; align-items: center; padding-block: 56px 32px; }
.hero h1 { font-size: var(--t-3xl); line-height: 1.04; margin-top: 14px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p.lead { font-size: 1.12rem; color: var(--muted); max-width: 52ch; margin: 18px 0 26px; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 10px; }
.orrery { position: relative; aspect-ratio: 1; width: 100%; max-width: 460px; justify-self: center; }
.orrery canvas { width: 100%; height: 100%; display: block; }
.orrery figcaption { position: absolute; left: 0; right: 0; bottom: -6px; text-align: center; font-size: var(--t-xs); color: var(--muted); }

.grid { display: grid; gap: 16px; }
.grid.trilhas { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.trilha { padding: 20px 22px; display: flex; flex-direction: column; gap: 10px; }
.trilha .num { font: 500 var(--t-xs) var(--f-mono); color: var(--accent); letter-spacing: 0.08em; }
.trilha h3 { font-size: var(--t-lg); }
.trilha p { color: var(--muted); font-size: var(--t-sm); margin: 0; }
.trilha ul { list-style: none; margin: 4px 0 0; padding: 0; display: grid; gap: 6px; font-size: var(--t-sm); }
.trilha li { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding-top: 6px; border-top: 1px dashed var(--line); }
.trilha li span.t { min-width: 0; }
.trilha li .soon { color: var(--muted); }

.grid.tools { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); align-items: stretch; }
.grid.tools > .tool { height: 100%; }
.tool .preview.regua { display: block; width: 100%; height: auto; background: none; }
.tool { padding: 22px; display: flex; flex-direction: column; gap: 10px; text-decoration: none; color: var(--ink); }
.tool.link:hover { border-color: var(--accent); }
.tool h3 { font-size: var(--t-lg); }
.tool p { color: var(--muted); font-size: var(--t-sm); margin: 0; }
.tool .preview { aspect-ratio: 16 / 9; border-radius: 10px; background: radial-gradient(circle at 50% 50%, #ffd27f 0 3%, rgba(255, 195, 90, 0.25) 4%, transparent 14%), #070b17; position: relative; overflow: hidden; }
.tool .preview i { position: absolute; left: 50%; top: 50%; border: 1px solid rgba(160, 175, 210, 0.3); border-radius: 50%; transform: translate(-50%, -50%); }
.tool .preview b { position: absolute; width: 7px; height: 7px; border-radius: 50%; }

.principles { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.principles div { padding: 18px 20px; }
.principles h3 { font-size: 1.02rem; margin-bottom: 6px; }
.principles p { color: var(--muted); font-size: var(--t-sm); margin: 0; }

/* ---------- Lição ---------- */
.crumbs { font-size: var(--t-sm); color: var(--muted); padding-top: 28px; }
.crumbs a { color: var(--muted); }
.licao-head { padding-block: 18px 28px; max-width: 760px; }
.licao-head h1 { font-size: var(--t-2xl); margin-top: 10px; }
.licao-head .lead { font-size: 1.15rem; color: var(--muted); margin-top: 14px; }
.meta { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 16px; font-size: var(--t-sm); color: var(--muted); }
.meta b { color: var(--ink); font-weight: 500; }

.licao { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 48px; align-items: start; }
.toc { position: sticky; top: 88px; font-size: var(--t-sm); }
.toc p { margin-bottom: 8px; }
.toc ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; counter-reset: toc; }
.toc a { display: block; color: var(--muted); text-decoration: none; padding: 5px 10px; border-left: 2px solid var(--line); }
.toc a:hover { color: var(--ink); }
.toc a.ativo { color: var(--ink); border-left-color: var(--accent); background: var(--accent-soft); }

.texto { max-width: 860px; font-size: 1.05rem; line-height: 1.72; }
/* parágrafos e listas ficam em ~68 caracteres; tabelas e figuras usam a largura toda */
.texto p, .texto ul, .texto ol, .texto h2, .texto h3 { max-width: 68ch; }
.texto .card p, .texto .card ul { max-width: none; }
.texto section { padding-bottom: 12px; }
.texto h2 { font-size: var(--t-xl); margin: 40px 0 14px; }
.texto h3 { font-size: var(--t-lg); margin: 26px 0 10px; }
.texto ul, .texto ol { padding-left: 1.3em; margin: 0 0 1em; }
.texto li { margin-bottom: 0.35em; }
.texto strong { font-weight: 600; }
.numero { font-variant-numeric: tabular-nums; font-weight: 500; white-space: nowrap; }

.destaque { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 22px 0; }
.destaque div { padding: 14px 16px; }
.destaque strong { display: block; font: 700 1.6rem/1.1 var(--f-display); color: var(--accent); }
.destaque span { font-size: var(--t-sm); color: var(--muted); line-height: 1.4; display: block; margin-top: 4px; }

.tabela-wrap { overflow-x: auto; margin: 18px 0 8px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); }
table.tabela { width: 100%; border-collapse: collapse; font-size: var(--t-sm); min-width: 760px; }
.tabela th, .tabela td { padding: 9px 11px; border-bottom: 1px solid var(--line); text-align: right; white-space: nowrap; }
.tabela th:first-child, .tabela td:first-child { text-align: left; }
.tabela th { font-weight: 500; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.tabela td { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
.tabela td:first-child { font-family: var(--f-body); font-weight: 500; }
.tabela tr:last-child td { border-bottom: 0; }
.tabela .sep td { border-top: 2px solid var(--line); }
.legenda { font-size: var(--t-xs); color: var(--muted); margin: 0 0 1.4em; }

figure.diagrama { margin: 22px 0; padding: 16px 18px 12px; }
figure.diagrama figcaption { font-size: var(--t-xs); color: var(--muted); margin-top: 8px; line-height: 1.5; }
.escala-svg text { font-family: var(--f-body); font-size: 11px; fill: var(--muted); }
.escala-svg .nome { fill: var(--ink); font-weight: 500; }
.escala-svg path.eixo { stroke: var(--line); }

.experimente { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 14px; align-items: start; padding: 16px 18px; margin: 22px 0; border-left: 3px solid var(--probe); }
.experimente .ico { width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); }
.experimente p { margin: 0 0 6px; font-size: var(--t-sm); }
.experimente .acoes { display: flex; flex-wrap: wrap; gap: 8px 16px; font-size: var(--t-sm); }

.nota { font-size: var(--t-sm); color: var(--muted); border-left: 2px solid var(--line); padding-left: 14px; margin: 18px 0; }

.resumo { padding: 20px 22px; margin: 36px 0 10px; }
.resumo h2 { margin: 0 0 10px !important; font-size: var(--t-lg) !important; }
.resumo ul { margin: 0; }

/* termos com definição */
a.termo { color: inherit; text-decoration: underline dotted; text-decoration-color: var(--accent); text-underline-offset: 4px; cursor: help; }
a.termo:hover { color: var(--accent); }
.termo-pop { position: absolute; z-index: 40; max-width: 320px; padding: 12px 14px; font-size: var(--t-sm); line-height: 1.5; color: var(--ink); background: var(--bg-soft); border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow); }
.termo-pop b { display: block; font-family: var(--f-display); margin-bottom: 4px; }
.termo-pop a { font-size: var(--t-xs); }

/* quiz */
.quiz { padding: 20px 22px; margin: 28px 0; }
.quiz h2 { margin: 0 0 4px !important; font-size: var(--t-lg) !important; }
.quiz .q { border-top: 1px dashed var(--line); padding-top: 14px; margin-top: 14px; }
.quiz .q > p { font-weight: 500; margin-bottom: 8px; }
.quiz .opts { display: grid; gap: 6px; }
.quiz button.opt { text-align: left; font: 400 var(--t-sm) var(--f-body); color: var(--ink); background: transparent; border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; cursor: pointer; }
.quiz button.opt:hover:not(:disabled) { border-color: var(--accent); }
.quiz button.opt.certa { border-color: var(--probe); box-shadow: inset 3px 0 0 var(--probe); }
.quiz button.opt.errada { border-color: #c2413a; box-shadow: inset 3px 0 0 #c2413a; }
.quiz button.opt:disabled { cursor: default; }
.quiz .explica { font-size: var(--t-sm); color: var(--muted); margin: 8px 0 0; }

/* fontes no fim da lição */
.fontes-licao { margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); }
.fontes-licao h2 { font-size: var(--t-lg) !important; margin: 0 0 6px !important; }
.fontes-licao ol { font-size: var(--t-sm); line-height: 1.5; padding-left: 1.4em; }
.fontes-licao li { margin-bottom: 10px; }
.fontes-licao li span { display: block; color: var(--muted); }

.proxima { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-top: 36px; }

/* ---------- Glossário e fontes (páginas) ---------- */
.busca { display: flex; flex-direction: column; gap: 6px; max-width: 460px; margin-bottom: 18px; }
.busca input { font: var(--t-md) var(--f-body); color: var(--ink); background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; }
.indice { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 26px; }
.indice a { font-size: var(--t-sm); text-decoration: none; padding: 5px 12px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); background: var(--card); }
.indice a:hover { color: var(--ink); border-color: var(--accent); }
.glo-grupo { margin-bottom: 30px; }
.glo-grupo > h2 { font-size: var(--t-xl); margin-bottom: 12px; }
.glo-lista { columns: 2 380px; column-gap: 20px; }
.glo-item { break-inside: avoid; padding: 16px 18px; margin-bottom: 14px; }
.glo-item h3 { font-size: 1.08rem; margin-bottom: 6px; }
.glo-item p { font-size: var(--t-sm); margin: 0 0 6px; }
.glo-item .ex { color: var(--muted); }
.glo-item .ex b { color: var(--ink); font-weight: 500; }
.glo-item .veja { font-size: var(--t-xs); color: var(--muted); margin: 0; }
.glo-item:target, .glo-item.realce { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft), var(--shadow); }

.src-grupo { margin-bottom: 32px; }
.src-grupo > h2 { font-size: var(--t-xl); }
.src-grupo > p { color: var(--muted); margin: 6px 0 14px; }
.src-lista { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 12px; }
.src-lista li { padding: 14px 16px; display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.src-lista li span { font-size: var(--t-sm); }
.src-lista code { font: var(--t-xs) var(--f-mono); color: var(--muted); overflow-wrap: anywhere; }

/* ---------- Responsivo ---------- */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 36px; }
  .orrery { max-width: 360px; }
  .licao { grid-template-columns: 1fr; gap: 0; }
  .toc { position: static; margin-bottom: 18px; }
  .toc ol { grid-auto-flow: row; }
}
@media (max-width: 560px) {
  :root { --gutter: 16px; }
  .site-nav { margin-left: 0; width: 100%; order: 3; overflow-x: auto; flex-wrap: nowrap; }
  .theme-btn, .theme-sel { margin-left: auto; }
  .theme-btn span { display: none; }
  .page-head h1, .licao-head h1 { font-size: var(--t-xl); }
  .texto { font-size: 1rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
.texto p.legenda { max-width: none; }

/* ---------- Curiosidades ---------- */
.grid.curios { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.curio { padding: 20px 22px; display: flex; flex-direction: column; gap: 8px; text-decoration: none; color: var(--ink); }
a.curio:hover { border-color: var(--accent); }
.curio h3 { font-size: 1.15rem; }
.curio p { color: var(--muted); font-size: var(--t-sm); margin: 0; }
.curio .ler { margin-top: auto; padding-top: 6px; color: var(--accent); font-size: var(--t-sm); font-weight: 500; }
.curio.soon h3 { color: var(--muted); font-weight: 500; }
.artigo { margin-inline: auto; padding-bottom: 8px; }
.resposta { padding: 18px 22px; margin: 4px 0 26px; border-left: 3px solid var(--accent); }
.resposta p { margin: 8px 0 0; font-size: 1.08rem; }
.faca { padding: 18px 22px; margin: 20px 0 26px; border-left: 3px solid var(--probe); }
.faca > p, .faca li { font-size: var(--t-sm); }
.faca ul, .faca ol { margin: 8px 0; }
.comparativo td { white-space: normal; font-family: var(--f-body); text-align: left; min-width: 180px; }
.comparativo th { text-align: left; }
.comparativo td:first-child { color: var(--muted); min-width: 120px; }
.calc { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin: 14px 0 6px; }
.calc fieldset { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; margin: 0; display: grid; gap: 4px; min-width: 0; }
.calc fieldset.full { grid-column: 1 / -1; }
.calc legend { font-size: var(--t-xs); text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); padding: 0 4px; }
.calc label { font-size: var(--t-xs); color: var(--muted); }
.calc input { font: var(--t-sm) var(--f-mono); color: var(--ink); background: var(--bg-soft); border: 1px solid var(--line); border-radius: 8px; padding: 7px 9px; width: 100%; }
.calc-out { grid-column: 1 / -1; display: block; padding: 12px 14px; border-radius: 10px; background: var(--accent-soft); font-size: var(--t-sm); line-height: 1.6; }
.calc-out strong { font: 700 1.25rem var(--f-display); color: var(--accent); }
.calc-out span { color: var(--muted); }
.erat { display: block; max-width: 600px; margin: 0 auto; }
.erat text { font-size: 12px; }
@media (max-width: 560px) { .calc { grid-template-columns: 1fr; } }

/* ---------- Páginas de ferramentas ---------- */
.tool-head { padding-block: 32px 18px; max-width: 780px; }
.tool-head h1 { font-size: var(--t-2xl); margin-top: 10px; }
.tool-head p { color: var(--muted); font-size: 1.05rem; margin-top: 12px; }
.tool-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 18px; align-items: start; }
.painel { padding: 18px 20px; }
.painel h2 { font-size: var(--t-lg); margin-bottom: 12px; }
.painel h3 { font-size: 1rem; margin: 16px 0 8px; }
.campo { display: flex; flex-direction: column; gap: 5px; margin-bottom: 12px; min-width: 0; }
.campo label, .campo .rot { font-size: var(--t-xs); text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); }
.campo input, .campo select { font: var(--t-md) var(--f-body); color: var(--ink); background: var(--bg-soft); border: 1px solid var(--line); border-radius: 10px; padding: 9px 12px; width: 100%; min-width: 0; }
.campo input[type="number"] { font-family: var(--f-mono); }
.linha-campos { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 10px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font: 500 var(--t-sm) var(--f-body); color: var(--ink); background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; cursor: pointer; }
.chip:hover { border-color: var(--accent); }
.chip[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.resultado { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.resultado td { padding: 9px 4px; border-bottom: 1px solid var(--line); vertical-align: baseline; }
.resultado td:first-child { color: var(--muted); font-size: var(--t-sm); padding-right: 12px; }
.resultado td:last-child { text-align: right; font-family: var(--f-mono); font-size: 0.95rem; }
.resultado tr.destaque-linha td:last-child { color: var(--accent); font-weight: 500; }
.dica { font-size: var(--t-sm); color: var(--muted); margin: 10px 0 0; }
.fontes-ferramenta { margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--line); max-width: 860px; }
.fontes-ferramenta h2 { font-size: var(--t-lg); margin-bottom: 6px; }
.fontes-ferramenta ol { font-size: var(--t-sm); padding-left: 1.4em; }
.fontes-ferramenta li { margin-bottom: 10px; }
.fontes-ferramenta li span { display: block; color: var(--muted); }
@media (max-width: 860px) { .tool-grid { grid-template-columns: 1fr; } }