/* Psiconometria — sistema visual
   Direção: relatório técnico. Papel branco, tinta preta, um acento (vermelho MIT).
   Grotesca para texto (Hanken Grotesk), STIX Two apenas para notação matemática. */

@font-face { font-family: 'Hanken Grotesk'; font-weight: 400; font-style: normal; font-display: swap; src: url('fonts/hanken-grotesk-latin-400-normal.woff2') format('woff2'); }
@font-face { font-family: 'Hanken Grotesk'; font-weight: 500; font-style: normal; font-display: swap; src: url('fonts/hanken-grotesk-latin-500-normal.woff2') format('woff2'); }
@font-face { font-family: 'Hanken Grotesk'; font-weight: 700; font-style: normal; font-display: swap; src: url('fonts/hanken-grotesk-latin-700-normal.woff2') format('woff2'); }
@font-face { font-family: 'STIX Two'; font-weight: 400; font-style: normal; font-display: swap; src: url('fonts/stix-two-text-latin-400-normal.woff2') format('woff2'); }
@font-face { font-family: 'STIX Two'; font-weight: 400; font-style: italic; font-display: swap; src: url('fonts/stix-two-text-latin-400-italic.woff2') format('woff2'); }
@font-face { font-family: 'STIX Two'; font-weight: 400; font-style: normal; font-display: swap; src: url('fonts/stix-two-text-greek-400-normal.woff2') format('woff2'); unicode-range: U+0370-03FF; }
@font-face { font-family: 'STIX Two'; font-weight: 400; font-style: italic; font-display: swap; src: url('fonts/stix-two-text-greek-400-italic.woff2') format('woff2'); unicode-range: U+0370-03FF; }

:root {
  --paper: #ffffff;
  --ink: #000000;
  --ink-2: #333436;
  --ink-3: #5f6062;
  --rule: #8a8b8c;
  --rule-light: #d6d6d6;
  --panel: #f2f2f2;
  --accent: #a31f34;
  --accent-dark: #7d1626;
  --accent-tint: #f6e8ea;

  --sans: 'Hanken Grotesk', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --math: 'STIX Two', 'Times New Roman', serif;

  --wrap: 76rem;
  --gutter: 1.5rem;
  --measure: 40rem;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 5rem; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  font-feature-settings: 'kern' 1;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:hover { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button, input, select, textarea { font: inherit; color: inherit; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
.tnum { font-variant-numeric: tabular-nums; }
.math { font-family: var(--math); font-style: italic; font-size: 1.12em; letter-spacing: 0.01em; }
.math-up { font-family: var(--math); font-style: normal; font-size: 1.12em; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--paper); padding: 0.5rem 1rem; z-index: 100; }
.skip:focus { left: 0; }

/* ---------- Tipografia ---------- */
h1, h2, h3, h4 { margin: 0; font-weight: 500; line-height: 1.15; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.125rem, 4.2vw, 3.25rem); letter-spacing: -0.02em; line-height: 1.08; max-width: 22ch; }
h2 { font-size: clamp(1.5rem, 2.4vw, 1.875rem); max-width: 38ch; }
h3 { font-size: 1.1875rem; font-weight: 700; letter-spacing: 0; line-height: 1.3; }
h4 { font-size: 1rem; font-weight: 700; letter-spacing: 0; }
.lede { font-size: 1.25rem; line-height: 1.5; color: var(--ink-2); max-width: var(--measure); margin-top: 1.25rem; }
.prose { max-width: var(--measure); }
.prose p { color: var(--ink-2); }
.prose p strong { color: var(--ink); }
.small { font-size: 0.875rem; line-height: 1.55; }
.muted { color: var(--ink-3); }
.kicker { font-size: 0.9375rem; font-weight: 700; color: var(--accent); margin: 0 0 0.75rem; }

/* ---------- Estrutura ---------- */
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
main { display: block; }

.site-header { border-bottom: 1px solid var(--ink); background: var(--paper); position: sticky; top: 0; z-index: 20; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 2rem; min-height: 4rem; }
.brand { display: flex; align-items: baseline; gap: 0.75rem; text-decoration: none; }
.brand-mark { font-weight: 700; font-size: 1.125rem; letter-spacing: -0.01em; }
.brand-sub { font-size: 0.8125rem; color: var(--ink-3); white-space: nowrap; }
.nav { display: flex; gap: 1.25rem; align-items: center; }
@media (max-width: 1320px) { .brand-sub { display: none; } }
.nav a { font-size: 0.9375rem; white-space: nowrap; text-decoration: none; padding: 0.25rem 0; border-bottom: 2px solid transparent; }
.nav a[aria-current="page"] { border-bottom-color: var(--accent); }
.nav a.nav-cta { border: 1px solid var(--ink); padding: 0.375rem 0.75rem; }
.nav a.nav-cta:hover { background: var(--ink); color: var(--paper); }
.menu-btn { display: none; background: none; border: 1px solid var(--ink); padding: 0.375rem 0.75rem; font-size: 0.9375rem; cursor: pointer; }
@media (max-width: 1100px) {
  .brand-sub { display: none; }
  .menu-btn { display: block; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 100%; background: var(--paper); border-bottom: 1px solid var(--ink); flex-direction: column; align-items: stretch; gap: 0; padding: 0.5rem var(--gutter) 1rem; }
  .nav.open { display: flex; }
  .nav a { padding: 0.75rem 0; border-bottom: 1px solid var(--rule-light); }
  .nav a[aria-current="page"] { color: var(--accent); border-bottom-color: var(--rule-light); }
  .nav a.nav-cta { margin-top: 0.75rem; text-align: center; }
}

/* Cabeçalho de página */
.page-head { padding: 4.5rem 0 3.5rem; border-bottom: 1px solid var(--rule-light); }
.page-head .lede { margin-top: 1.5rem; }

/* Seções numeradas (usadas onde o conteúdo é uma sequência de argumento) */
.sec { padding: 4.5rem 0; border-bottom: 1px solid var(--rule-light); }
.sec:last-of-type { border-bottom: 0; }
.sec-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 900px) { .sec-grid { grid-template-columns: 14rem 1fr; gap: 3rem; } }
.sec-num { font-family: var(--math); font-size: 1.5rem; line-height: 1; color: var(--accent); }
.sec-label { font-size: 0.9375rem; font-weight: 700; margin-top: 0.5rem; }
.sec-body > h2 + * { margin-top: 1.5rem; }
.sec-body > * + h3 { margin-top: 2.5rem; }

/* ---------- Abertura (home) ---------- */
.hero { padding: 4.5rem 0 4rem; border-bottom: 1px solid var(--ink); }
.hero-grid { display: grid; gap: 3rem; grid-template-columns: 1fr; }
@media (min-width: 1000px) { .hero-grid { grid-template-columns: 5fr 6fr; gap: 4rem; align-items: start; } }
.hero h1 { max-width: 16ch; }
.hero .actions { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem; align-items: center; }

/* Equação interativa */
.eqfig { border: 1px solid var(--ink); padding: 2rem 1.5rem 1.5rem; }
.eq { font-family: var(--math); font-size: clamp(1.375rem, 5.6vw, 2.125rem); line-height: 1.4; display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 0.35em; justify-content: center; }
.eq .op { font-style: normal; color: var(--ink-3); }
@media (min-width: 1000px) { .eq { flex-wrap: nowrap; font-size: clamp(1.125rem, 1.75vw, 1.875rem); } }
.eq-term { font: inherit; white-space: nowrap; font-style: italic; background: none; border: 0; border-bottom: 2px solid var(--rule-light); padding: 0 0.08em; cursor: pointer; line-height: 1.25; }
.eq-term sub { font-size: 0.55em; font-style: italic; }
.eq-term:hover { border-bottom-color: var(--ink); }
.eq-term[aria-pressed="true"] { color: var(--accent); border-bottom-color: var(--accent); }
.eq-legend { margin-top: 1.75rem; border-top: 1px solid var(--rule-light); padding-top: 1.25rem; min-height: 9.5rem; }
.eq-legend .who { font-size: 0.875rem; font-weight: 700; }
.eq-legend .who .disc { font-weight: 400; color: var(--ink-3); }
.eq-legend p { margin: 0.5rem 0 0; font-size: 0.9375rem; color: var(--ink-2); }
.eq-legend .ex { color: var(--ink-3); }
.eq-key { margin-top: 1rem; display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; font-size: 0.8125rem; color: var(--ink-3); }
.eq-key span::before { content: ''; display: inline-block; width: 0.75rem; height: 2px; vertical-align: middle; margin-right: 0.4rem; background: currentColor; }
.eq-key .k-psi::before { background: var(--ink); }
.eq-key .k-eco::before { background: var(--rule); }

/* ---------- Botões e links ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 2.75rem; padding: 0 1.25rem; background: var(--ink); color: var(--paper); border: 1px solid var(--ink); text-decoration: none; font-weight: 500; font-size: 0.9375rem; cursor: pointer; }
.btn:hover { background: var(--accent); border-color: var(--accent); color: var(--paper); }
.btn[disabled] { opacity: 0.55; cursor: progress; }
.btn-line { background: transparent; color: var(--ink); }
.btn-line:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.link { font-weight: 500; text-decoration: underline; }

/* ---------- Figuras ---------- */
.fig { margin: 2.5rem 0 0; }
.fig figcaption { margin-top: 0.875rem; font-size: 0.875rem; line-height: 1.55; color: var(--ink-3); max-width: 46rem; }
.fig figcaption b { color: var(--ink); font-weight: 700; margin-right: 0.35em; }
.fig-frame { border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); padding: 1.5rem 0; overflow-x: auto; }
.fig svg text { font-family: var(--sans); }

/* Cadeia de mecanismo (horizontal em telas largas) */
.chain { list-style: none; display: grid; grid-template-columns: 1fr; gap: 0; counter-reset: ch; }
.chain li { position: relative; padding: 0.875rem 0 0.875rem 2.25rem; border-top: 1px solid var(--rule-light); }
.chain li:first-child { border-top: 0; }
.chain li::before { counter-increment: ch; content: counter(ch); position: absolute; left: 0; top: 0.875rem; width: 1.5rem; height: 1.5rem; border: 1px solid var(--ink); font-size: 0.75rem; display: grid; place-items: center; font-variant-numeric: tabular-nums; }
.chain .step { display: block; font-size: 0.8125rem; color: var(--ink-3); }
.chain .txt { display: block; font-size: 0.9375rem; margin-top: 0.125rem; }
@media (min-width: 900px) {
  .chain.h { grid-template-columns: repeat(5, 1fr); }
  .chain.h li { padding: 2.25rem 1rem 0 0; border-top: 1px solid var(--ink); }
  .chain.h li::before { top: -0.75rem; left: 0; background: var(--paper); }
  .chain.h li:not(:last-child)::after { content: ''; position: absolute; top: -4px; right: 0; border: 4px solid transparent; border-left: 6px solid var(--ink); }
}

/* ---------- Listas, tabelas, blocos ---------- */
.rows { list-style: none; border-top: 1px solid var(--ink); }
.rows > li, .rows > div { border-bottom: 1px solid var(--rule-light); padding: 1.125rem 0; }
.rows-2 > li, .rows-2 > div { display: grid; grid-template-columns: 1fr; gap: 0.25rem 2rem; }
@media (min-width: 760px) { .rows-2 > li, .rows-2 > div { grid-template-columns: 15rem 1fr; } }
.rows dt, .rows .k { font-weight: 700; font-size: 0.9375rem; }
.rows dd, .rows .v { margin: 0; color: var(--ink-2); font-size: 0.9375rem; }
dl { margin: 0; }

.cols-2 { display: grid; gap: 2rem; grid-template-columns: 1fr; }
.cols-3 { display: grid; gap: 2rem; grid-template-columns: 1fr; }
@media (min-width: 760px) { .cols-2 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 900px) { .cols-3 { grid-template-columns: repeat(3, 1fr); } }

.panel { background: var(--panel); padding: 1.5rem; }
.panel > :last-child { margin-bottom: 0; }
.note { border-left: 3px solid var(--accent); padding: 0.25rem 0 0.25rem 1.25rem; max-width: var(--measure); color: var(--ink-2); font-size: 0.9375rem; }
.note b { color: var(--ink); }

.check-list { list-style: none; }
.check-list li { padding: 0.625rem 0 0.625rem 1.75rem; position: relative; border-top: 1px solid var(--rule-light); font-size: 0.9375rem; color: var(--ink-2); }
.check-list li::before { position: absolute; left: 0; top: 0.625rem; font-weight: 700; color: var(--ink); }
.check-list.yes li::before { content: '+'; }
.check-list.no li::before { content: '−'; color: var(--accent); }

.data-table { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
.data-table th, .data-table td { text-align: left; padding: 0.625rem 0.75rem 0.625rem 0; border-bottom: 1px solid var(--rule-light); vertical-align: top; }
.data-table thead th { border-bottom: 1px solid var(--ink); font-weight: 700; font-size: 0.875rem; }
.data-table td.num, .data-table th.num { text-align: right; font-variant-numeric: tabular-nums; }

/* Dores */
.pains { list-style: none; border-top: 1px solid var(--ink); }
.pain { border-bottom: 1px solid var(--rule-light); }
.pain > button { width: 100%; display: grid; grid-template-columns: 1fr auto; gap: 1rem; align-items: baseline; text-align: left; background: none; border: 0; padding: 1.25rem 0; cursor: pointer; }
.pain > button h3 { font-weight: 500; font-size: 1.1875rem; }
.pain > button .sym { font-family: var(--math); font-size: 1.375rem; line-height: 1; color: var(--ink-3); }
.pain > button[aria-expanded="true"] .sym { color: var(--accent); }
.pain > button:hover h3 { color: var(--accent); }
.pain-body { display: grid; grid-template-columns: 1fr; gap: 1.25rem 2rem; padding: 0 0 1.75rem; }
.pain-body[hidden] { display: none; }
@media (min-width: 760px) { .pain-body { grid-template-columns: repeat(3, 1fr); } }
.pain-body h4 { font-size: 0.875rem; margin-bottom: 0.375rem; }
.pain-body p { font-size: 0.9375rem; color: var(--ink-2); margin: 0; }
.pain-body .go { grid-column: 1 / -1; font-size: 0.9375rem; }

/* Escala de evidência (4 marcas, independente de cor) */
.ev { display: inline-flex; align-items: center; gap: 0.5rem; font-size: 0.8125rem; white-space: nowrap; color: var(--ink-2); }
.ev-bar { display: inline-flex; gap: 3px; }
.ev-bar i { width: 0.375rem; height: 0.75rem; border: 1px solid var(--ink); display: block; }
.ev-bar i.on { background: var(--ink); }
.tag { display: inline-block; border: 1px solid var(--ink); padding: 0.0625rem 0.5rem; font-size: 0.8125rem; line-height: 1.5; }
.tag-dash { border-style: dashed; color: var(--ink-3); border-color: var(--rule); }
.tags { display: flex; flex-wrap: wrap; gap: 0.375rem; }

/* ---------- Controles ---------- */
.field { display: flex; flex-direction: column; gap: 0.375rem; }
.field label { font-size: 0.875rem; font-weight: 700; }
.field .opt { font-weight: 400; color: var(--ink-3); }
input[type="text"], input[type="email"], input[type="search"], select, textarea {
  width: 100%; min-height: 2.75rem; border: 1px solid var(--rule); background: var(--paper); padding: 0.5rem 0.75rem; font-size: 0.9375rem; border-radius: 0; appearance: none; -webkit-appearance: none;
}
select { background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%), linear-gradient(135deg, var(--ink) 50%, transparent 50%); background-position: calc(100% - 1.1rem) 52%, calc(100% - 0.8rem) 52%; background-size: 0.3rem 0.3rem; background-repeat: no-repeat; padding-right: 2rem; }
textarea { min-height: 8rem; resize: vertical; line-height: 1.5; }
input:focus, select:focus, textarea:focus { border-color: var(--ink); outline: 1px solid var(--ink); outline-offset: 0; }
input[type="range"] { width: 100%; accent-color: var(--accent); }

.tabs { display: flex; flex-wrap: wrap; border-bottom: 1px solid var(--ink); }
.tabs button { background: none; border: 0; border-bottom: 3px solid transparent; margin-bottom: -1px; padding: 0.75rem 1.25rem 0.625rem 0; margin-right: 1.25rem; font-size: 1rem; cursor: pointer; color: var(--ink-3); }
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); font-weight: 500; }

.pick { list-style: none; border-top: 1px solid var(--ink); }
.pick button { width: 100%; display: flex; gap: 0.875rem; align-items: baseline; text-align: left; background: none; border: 0; border-bottom: 1px solid var(--rule-light); padding: 0.75rem 0.5rem 0.75rem 0; cursor: pointer; font-size: 0.9375rem; }
.pick button .n { font-size: 0.8125rem; color: var(--ink-3); font-variant-numeric: tabular-nums; min-width: 1.5rem; }
.pick button:hover { color: var(--accent); }
.pick button[aria-current="true"] { color: var(--accent); font-weight: 500; box-shadow: inset 3px 0 0 var(--accent); padding-left: 0.75rem; }

.split { display: grid; gap: 2.5rem; grid-template-columns: 1fr; }
@media (min-width: 1000px) { .split { grid-template-columns: 4fr 8fr; gap: 3.5rem; } .split-5-7 { grid-template-columns: 5fr 7fr; } }
.detail { border-top: 1px solid var(--ink); padding-top: 1.5rem; }
.detail h2 { font-size: 1.75rem; }

/* Catálogo */
.filters { display: grid; gap: 1rem; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); padding: 1.25rem 0; }
.filters .search { grid-column: 1 / -1; }
@media (min-width: 1000px) { .filters { grid-template-columns: repeat(6, 1fr); } }
.count { margin-top: 1.25rem; font-size: 0.875rem; color: var(--ink-3); }
.family { margin-top: 3.5rem; }
.family > h2 { font-size: 1.375rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--ink); max-width: none; }
.methods { display: grid; grid-template-columns: 1fr; }
@media (min-width: 760px) { .methods { grid-template-columns: 1fr 1fr; column-gap: 2.5rem; } }
@media (min-width: 1200px) { .methods { grid-template-columns: repeat(3, 1fr); } }
.method { border-bottom: 1px solid var(--rule-light); padding: 1.5rem 0; display: flex; flex-direction: column; }
.method-top { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; }
.method h3 { font-size: 1.0625rem; }
.method .mede { margin: 0.5rem 0 0; font-size: 0.9375rem; color: var(--ink-2); }
.method dl { margin-top: 1rem; display: grid; grid-template-columns: 5rem 1fr; gap: 0.25rem 0.75rem; font-size: 0.875rem; }
.method dt { color: var(--ink-3); }
.method dd { margin: 0; }
.method .pr { margin-top: 1rem; display: grid; gap: 0.75rem; font-size: 0.875rem; color: var(--ink-2); }
.method .pr b { color: var(--ink); }
.method .src { margin-top: auto; padding-top: 1rem; font-size: 0.8125rem; color: var(--ink-3); line-height: 1.5; }
.empty { margin-top: 2rem; border: 1px solid var(--rule); padding: 2rem; color: var(--ink-2); }

/* Matriz (lista de fatores) */
.factor-list { list-style: none; border-top: 1px solid var(--ink); display: grid; grid-template-columns: 1fr 1fr; column-gap: 1rem; }
@media (min-width: 1000px) { .factor-list { grid-template-columns: 1fr; } }

/* Laboratório */
.lab-in .row { border-bottom: 1px solid var(--rule-light); padding: 1rem 0; }
.lab-in .row-top { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; }
.lab-in label { font-size: 0.9375rem; font-weight: 500; }
.lab-in output { font-weight: 700; font-variant-numeric: tabular-nums; }
.lab-in input { margin-top: 0.5rem; }
.kpis3 { display: grid; grid-template-columns: 1fr; border-top: 1px solid var(--ink); }
@media (min-width: 640px) { .kpis3 { grid-template-columns: repeat(3, 1fr); } }
.kpis3 > div { padding: 1rem 1rem 1rem 0; border-bottom: 1px solid var(--rule-light); }
.kpis3 .lbl { font-size: 0.875rem; color: var(--ink-3); }
.kpis3 .val { font-size: 1.75rem; font-weight: 500; font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
.scen { margin-top: 1.25rem; }
.scen-top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.25rem 1rem; font-size: 0.9375rem; }
.scen-top .r { color: var(--ink-2); font-variant-numeric: tabular-nums; }
.scen-bar { position: relative; height: 1.25rem; margin-top: 0.5rem; border-bottom: 1px solid var(--ink); }
.scen-bar .range { position: absolute; top: 50%; height: 2px; transform: translateY(-50%); background: var(--rule); }
.scen-bar .range::before, .scen-bar .range::after { content: ''; position: absolute; top: -5px; width: 1px; height: 12px; background: var(--rule); }
.scen-bar .range::before { left: 0; } .scen-bar .range::after { right: 0; }
.scen-bar .pt { position: absolute; top: 50%; width: 10px; height: 10px; margin-left: -5px; transform: translateY(-50%); background: var(--accent); }

/* Casos */
.case { padding: 3.5rem 0; border-top: 1px solid var(--ink); }
.case:first-child { border-top: 0; padding-top: 0; }
.case-meta { font-size: 0.9375rem; color: var(--ink-3); margin-top: 0.75rem; }
.case h2 { font-size: 1.75rem; margin-top: 0.875rem; }

/* Glossário */
.terms > div { display: grid; grid-template-columns: 1fr; gap: 0.25rem 2rem; border-bottom: 1px solid var(--rule-light); padding: 1.25rem 0; }
@media (min-width: 760px) { .terms > div { grid-template-columns: 15rem 1fr; } }
.terms dt { font-weight: 700; }
.terms dd { margin: 0; color: var(--ink-2); font-size: 0.9375rem; }
.terms .ex { margin-top: 0.5rem; color: var(--ink-3); }
.terms .ex::before { content: 'Exemplo: '; color: var(--ink); font-weight: 500; }

/* Método */
.steps { list-style: none; counter-reset: st; border-top: 1px solid var(--ink); }
.steps li { display: grid; grid-template-columns: 3rem 1fr; gap: 0.25rem 1rem; border-bottom: 1px solid var(--rule-light); padding: 1.5rem 0; counter-increment: st; }
.steps li::before { content: counter(st); font-family: var(--math); font-size: 1.75rem; line-height: 1; color: var(--accent); grid-row: span 2; }
.steps h3 { font-weight: 500; font-size: 1.25rem; }
.steps p { margin: 0.375rem 0 0; color: var(--ink-2); max-width: var(--measure); }
.inline-list { list-style: none; display: flex; flex-wrap: wrap; gap: 0.375rem; }

/* Formulários */
.form { display: grid; gap: 1.125rem; }
.form .two { display: grid; gap: 1.125rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .form .two { grid-template-columns: 1fr 1fr; } }
.form-msg { font-size: 0.9375rem; margin: 0; }
.form-msg.err { color: var(--accent); }
.form-done { border-top: 1px solid var(--ink); padding-top: 1.25rem; }
.form-done h3 { font-weight: 500; font-size: 1.375rem; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

/* ---------- Rodapé ---------- */
.site-footer { border-top: 1px solid var(--ink); margin-top: 0; padding: 3.5rem 0 2rem; font-size: 0.9375rem; }
.foot-grid { display: grid; gap: 2.5rem; grid-template-columns: 1fr; }
@media (min-width: 900px) { .foot-grid { grid-template-columns: 5fr 3fr 4fr; gap: 3rem; } }
.site-footer h2 { font-size: 0.9375rem; font-weight: 700; margin-bottom: 0.875rem; letter-spacing: 0; }
.site-footer .about { color: var(--ink-2); max-width: 30rem; }
.site-footer ul { list-style: none; }
.site-footer li { margin: 0 0 0.375rem; }
.site-footer li a { text-decoration: none; }
.site-footer li a:hover { text-decoration: underline; }
.site-footer .commit li { color: var(--ink-2); padding-left: 1rem; position: relative; }
.site-footer .commit li::before { content: '–'; position: absolute; left: 0; }
.nl { margin-top: 1.75rem; }
.nl form { display: flex; margin-top: 0.5rem; max-width: 26rem; }
.nl input { flex: 1; min-width: 0; }
.nl .btn { margin-left: -1px; }
.nl .form-msg { margin-top: 0.5rem; font-size: 0.875rem; }
.foot-bottom { margin-top: 3rem; padding-top: 1.25rem; border-top: 1px solid var(--rule-light); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 2rem; font-size: 0.8125rem; color: var(--ink-3); }
.sources { margin-top: 1.25rem; font-size: 0.8125rem; color: var(--ink-3); }

/* Acessibilidade de movimento */
@media (prefers-reduced-motion: no-preference) {
  .eq-legend p { animation: fadein 0.25s ease-out; }
  @keyframes fadein { from { opacity: 0; } to { opacity: 1; } }
}

@media print {
  .site-header, .site-footer, .nl, .actions { display: none; }
  .sec { padding: 1.5rem 0; }
}

/* Diagrama de duas camadas (O conceito) */
.layers { border-top: 1px solid var(--ink); padding-top: 1.5rem; }
.layer-name { font-size: 0.875rem; font-weight: 700; margin-bottom: 0.75rem; }
.layer { display: grid; gap: 0.5rem; grid-template-columns: 1fr 1fr; }
.layer-h { }
@media (min-width: 1000px) { .layer-h { grid-template-columns: repeat(4, 1fr); } .layer-e { grid-template-columns: repeat(6, 1fr); } }
@media (min-width: 640px) and (max-width: 999px) { .layer-e { grid-template-columns: repeat(3, 1fr); } }
.layer-h button { background: var(--paper); border: 1px solid var(--ink); padding: 0.875rem; text-align: left; font-size: 0.9375rem; font-weight: 500; cursor: pointer; min-height: 4rem; }
.layer-h button:hover { background: var(--panel); }
.layer-h button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.layer-e > div { border: 1px dashed var(--rule); padding: 0.875rem; font-size: 0.8125rem; color: var(--ink-3); }
.layer-e > div b { display: block; font-size: 0.9375rem; font-weight: 500; color: var(--ink-2); margin-bottom: 0.25rem; }
.layer-e > div.on { border: 1px solid var(--accent); background: var(--accent-tint); color: var(--ink-2); }
.layer-e > div.on b { color: var(--accent); }
.layer-sep { margin: 1.25rem 0; font-size: 0.8125rem; color: var(--ink-3); display: flex; align-items: center; gap: 0.75rem; }
.layer-sep::before, .layer-sep::after { content: ''; flex: 1; border-top: 1px dashed var(--rule); }
.layer-desc { margin-top: 1.25rem; border-top: 1px solid var(--rule-light); padding-top: 1rem; font-size: 0.9375rem; color: var(--ink-2); min-height: 3.5rem; }

/* Fluxo (Fig. 1 da home) */
.flow { list-style: none; display: grid; grid-template-columns: 1fr; gap: 0; }
.flow li { padding: 0.75rem 0; border-bottom: 1px solid var(--rule-light); display: flex; gap: 0.75rem; align-items: baseline; }
.flow li .lv { font-size: 0.8125rem; color: var(--ink-3); min-width: 6.5rem; }
.flow li b { font-weight: 500; }
@media (min-width: 900px) {
  .flow { grid-template-columns: repeat(6, 1fr); }
  .flow li { flex-direction: column; gap: 0.375rem; border-bottom: 0; border-left: 1px solid var(--ink); padding: 0 1rem; position: relative; }
  .flow li:first-child { border-left: 0; padding-left: 0; }
  .flow li b { font-size: 1.0625rem; }
  .flow li:not(:last-child)::after { content: ''; position: absolute; right: -1px; top: 50%; }
}
.flow-axis { display: none; }
@media (min-width: 900px) {
  .flow-axis { display: flex; justify-content: space-between; margin-top: 1.25rem; font-size: 0.8125rem; color: var(--ink-3); }
}

/* Três portas de entrada (home) */
.doors { list-style: none; display: grid; grid-template-columns: 1fr; border-top: 1px solid var(--ink); }
@media (min-width: 900px) { .doors { grid-template-columns: repeat(3, 1fr); column-gap: 2rem; } }
.doors li { border-bottom: 1px solid var(--rule-light); padding: 1.25rem 0; }
.doors a { text-decoration: none; display: block; }
.doors a h3 { text-decoration: underline; text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
.doors a:hover h3 { color: var(--accent); }
.doors p { margin: 0.5rem 0 0; color: var(--ink-2); font-size: 0.9375rem; }

/* Convergências (lista compacta) */
.conv { list-style: none; display: grid; grid-template-columns: 1fr; column-gap: 2rem; border-top: 1px solid var(--ink); counter-reset: cv; }
@media (min-width: 760px) { .conv { grid-template-columns: 1fr 1fr; } }
.conv li { border-bottom: 1px solid var(--rule-light); counter-increment: cv; }
.conv a { display: flex; gap: 0.875rem; padding: 0.75rem 0; text-decoration: none; font-size: 0.9375rem; }
.conv a::before { content: counter(cv); color: var(--ink-3); font-size: 0.8125rem; min-width: 1.5rem; font-variant-numeric: tabular-nums; }
.conv a:hover { color: var(--accent); }

/* Exemplo didático */
.worked { list-style: none; counter-reset: wk; }
.worked > li { counter-increment: wk; display: grid; grid-template-columns: 1fr; gap: 0.5rem 2rem; padding: 1.75rem 0; border-top: 1px solid var(--rule-light); }
.worked > li:first-child { border-top: 1px solid var(--ink); }
@media (min-width: 900px) { .worked > li { grid-template-columns: 12rem 1fr; } }
.worked .wk-h { font-weight: 700; font-size: 0.9375rem; }
.worked .wk-h::before { content: 'Passo ' counter(wk); display: block; font-weight: 400; color: var(--ink-3); font-size: 0.8125rem; }
.worked .wk-b > :last-child { margin-bottom: 0; }
.worked .wk-b p { color: var(--ink-2); max-width: var(--measure); }
.stat-line { display: flex; flex-wrap: wrap; gap: 0.5rem 2rem; margin: 1rem 0; padding: 0.875rem 0; border-top: 1px solid var(--rule-light); border-bottom: 1px solid var(--rule-light); font-size: 0.9375rem; }
.stat-line div { display: flex; flex-direction: column; }
.stat-line span { font-size: 0.8125rem; color: var(--ink-3); }
.stat-line b { font-weight: 500; font-variant-numeric: tabular-nums; }

/* Seletor de idioma (bandeiras) */
.lang { position: relative; margin-left: auto; }
@media (min-width: 1101px) { .lang { order: 3; margin-left: 0; } .site-header .nav { order: 2; } }
.lang-btn { display: inline-flex; align-items: center; gap: 0.5rem; background: none; border: 1px solid var(--rule); padding: 0.375rem 0.625rem; font-size: 0.8125rem; font-weight: 500; cursor: pointer; min-height: 2.25rem; }
.lang-btn:hover, .lang-btn[aria-expanded="true"] { border-color: var(--ink); }
.flag { display: block; width: 20px; height: 14px; box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.18); flex: none; }
.lang-list { position: absolute; right: 0; top: calc(100% + 0.375rem); list-style: none; background: var(--paper); border: 1px solid var(--ink); min-width: 11rem; z-index: 30; padding: 0.25rem 0; }
.lang-list[hidden] { display: none; }
.lang-list a { display: flex; align-items: center; gap: 0.75rem; padding: 0.625rem 0.875rem; text-decoration: none; font-size: 0.9375rem; }
.lang-list a:hover { background: var(--panel); color: var(--ink); }
.lang-list a[aria-current="true"] { font-weight: 700; box-shadow: inset 3px 0 0 var(--accent); }
@media (max-width: 1100px) { .site-header .wrap { gap: 0.75rem; } }