/* ============================================================
   LURION — style.css
   Blocos nomeados por função, reutilizáveis nas páginas de
   nicho (E2–E4): .hero, .card-segment, .section-compare,
   .cycle, .cta-band, .page-header…
   Toda cor vem de css/tokens.css.
   ============================================================ */

/* --- Fontes (self-hosted, variable) ------------------------ */
@font-face {
  font-family: "Manrope";
  src: url("../fonts/manrope-var-latin.woff2") format("woff2");
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Raleway";
  src: url("../fonts/raleway-var-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* --- Reset curto ------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: var(--lh-body);
  color: var(--color-ink);
  background: var(--color-surface);
}
img, svg { display: block; max-width: 100%; }
/* :where() zera a especificidade do reset. Sem isso, `ul[class]` (0,1,1)
   venceria qualquer regra de classe (0,1,0) e engoliria o padding que os
   componentes definem para si — foi o que escondia o respiro da .seal-list. */
:where(ul[class], ol[class]) { list-style: none; padding: 0; }
a { color: var(--color-brand); }

h1, h2, h3 {
  font-family: var(--font-title);
  font-weight: 700;
  line-height: var(--lh-title);
  color: var(--color-ink);
}

:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 3px;
}

/* Âncoras não somem sob o header fixo */
section[id] { scroll-margin-top: calc(var(--header-h) + 1rem); }

/* --- Utilitários ------------------------------------------- */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--color-brand-dark);
  color: var(--color-on-brand);
  font-family: var(--font-title);
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 var(--radius) var(--radius);
}
.skip-link:focus { top: 0; }

/* Rótulo técnico — a "cota" que abre cada seção */
.label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-title);
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--color-steel);
}
/* Barra dupla — elemento gráfico do manual (as duas linhas paralelas
   que "funcionam como pontes visuais"). Custo zero: dois cantos de borda. */
.label::before {
  content: "";
  flex: none;
  width: 2rem;
  height: 7px;
  border-top: var(--line-w) solid currentColor;
  border-bottom: var(--line-w) solid currentColor;
}

/* --- Botões ------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.8125rem 1.5rem;
  font-family: var(--font-title);
  font-size: var(--fs-body);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  border: var(--line-w) solid transparent;
  border-radius: var(--radius);
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.btn svg { flex: none; }
.btn { white-space: nowrap; }

.btn-primary {
  background: var(--color-brand);
  color: var(--color-on-brand);
}
.btn-primary:hover { background: var(--color-brand-dark); }

.btn-ghost {
  background: transparent;
  color: var(--color-brand);
  border-color: var(--color-brand);
}
.btn-ghost:hover { background: var(--color-brand-tint); }

/* Variante para fundos escuros (CTA final, rodapé) */
.btn-on-dark {
  background: var(--color-surface);
  color: var(--color-brand-dark);
}
.btn-on-dark:hover { background: var(--color-surface-alt); }

/* --- Header ------------------------------------------------ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--header-h);
  background: transparent;
  border-bottom: var(--line-w) solid transparent;
  transition: background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.site-header.is-scrolled,
.site-header.is-solid {
  background: var(--color-surface);
  border-bottom-color: var(--color-line);
}
.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.375rem;
  letter-spacing: 0.01em;
  line-height: 1;
}
/* Símbolo oficial: 4 peças em 2 tons, para inverter sobre fundo escuro */
.brand-mark {
  flex: none;
  width: auto;
  height: 2em;
}
.brand-mark-roof,
.brand-mark-left  { fill: var(--color-mark-dark); }
.brand-mark-small,
.brand-mark-right { fill: var(--color-mark-light); }

.brand-word { display: inline-flex; align-items: baseline; }
.brand-lur { color: var(--color-brand-dark); }
.brand-ion { color: var(--color-mark-light); } /* mesmo tom do símbolo, como no logo oficial */
.brand-tag {
  margin-left: var(--space-3);
  font-size: 0.6875rem; /* 11px — abaixo disso a assinatura fica ilegível no celular */
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}
.nav-link {
  font-family: var(--font-title);
  font-size: var(--fs-small);
  font-weight: 600;
  white-space: nowrap;
  color: var(--color-ink);
  text-decoration: none;
  padding: var(--space-2) 0;
  border-bottom: 2px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-link:hover { color: var(--color-brand); border-bottom-color: var(--color-brand); }

.header-actions { display: flex; align-items: center; gap: var(--space-4); }

.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  background: none;
  border: var(--line-w) solid var(--color-line);
  border-radius: var(--radius);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle-bars {
  position: relative;
  width: 1.125rem;
  height: 2px;
  background: var(--color-ink);
  transition: background-color var(--dur) var(--ease);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-ink);
  transition: transform var(--dur) var(--ease);
}
.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after  { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after  { transform: translateY(-6px) rotate(-45deg); }

/* --- Hero -------------------------------------------------- */
.hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(3rem, 2rem + 6vw, 7rem));
  padding-bottom: var(--space-section);
  background:
    linear-gradient(var(--color-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid-line) 1px, transparent 1px),
    linear-gradient(180deg, var(--color-surface-alt), var(--color-surface) 70%);
  background-size: 72px 72px, 72px 72px, 100% 100%;
  border-bottom: var(--line-w) solid var(--color-line);
}
.hero-inner { max-width: 46rem; }
.hero-title {
  font-size: var(--fs-hero);
  font-weight: 700;
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
  color: var(--color-brand-dark);
}
/* Cota de desenho técnico sob o título: linha com terminais */
.hero-rule {
  position: relative;
  width: 7.5rem;
  height: var(--line-w);
  margin: var(--space-5) 0;
  background: var(--color-steel);
}
.hero-rule::before,
.hero-rule::after {
  content: "";
  position: absolute;
  top: -4px;
  width: var(--line-w);
  height: 9px;
  background: var(--color-steel);
}
.hero-rule::before { left: 0; }
.hero-rule::after  { right: 0; }

.hero-sub {
  font-size: var(--fs-lead);
  color: var(--color-ink-muted);
  max-width: 36rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

/* --- Seções (base) ----------------------------------------- */
.section { padding-block: var(--space-section); }
.section-alt { background: var(--color-surface-alt); }
.section-head { max-width: 46rem; margin-bottom: var(--space-7); }
.section-title {
  font-size: var(--fs-h2);
  letter-spacing: -0.01em;
  margin-top: var(--space-4);
}
.section-sub {
  margin-top: var(--space-4);
  color: var(--color-ink-muted);
  font-size: var(--fs-lead);
}

/* --- Quem somos -------------------------------------------- */
.about-grid {
  display: grid;
  gap: var(--space-7);
}
.about-text p + p { margin-top: var(--space-4); }
.about-text strong { font-weight: 500; color: var(--color-brand-dark); }

.seal-list {
  display: grid;
  gap: var(--space-5);
  padding-top: var(--space-6);
  border-top: var(--line-w) solid var(--color-line);
}
.seal {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  align-items: start;
}
.seal-icon {
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  color: var(--color-brand);
  border: var(--line-w) solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
}
.seal-title {
  font-size: var(--fs-body);
  font-weight: 700;
}
.seal-text {
  margin-top: var(--space-1);
  font-size: var(--fs-small);
  color: var(--color-ink-muted);
}

/* --- O que fazemos: cards de segmento ----------------------
   Os dois rótulos de grupo vêm antes dos cards no HTML (para que a
   ordem de leitura faça sentido sem CSS), então cada layout precisa
   dizer explicitamente em que linha cada peça entra. Aqui, 1 coluna:
   rótulo A · card 1 · card 2 · rótulo B · card 3 */
.segment-grid {
  display: grid;
  gap: var(--space-4) var(--space-5);
}
.segment-group-label { align-self: end; }
.segment-group-label--a { grid-row: 1; }
.segment-grid > .card-segment:nth-of-type(1) { grid-row: 2; }
.segment-grid > .card-segment:nth-of-type(2) { grid-row: 3; }
.segment-group-label--b { grid-row: 4; margin-top: var(--space-5); }
.segment-grid > .card-segment:nth-of-type(3) { grid-row: 5; }

.card-segment {
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  background: var(--color-surface);
  border: var(--line-w) solid var(--color-line);
  border-top: 3px solid var(--color-brand);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.card-segment:hover {
  border-color: var(--color-steel);
  border-top-color: var(--color-brand);
  transform: translateY(-3px);
  box-shadow: 0 12px 28px var(--color-shadow);
}
.card-title { font-size: var(--fs-h3); }
.card-pain {
  margin-top: var(--space-3);
  padding-left: var(--space-4);
  border-left: 2px solid var(--color-accent);
  font-size: var(--fs-small);
  color: var(--color-ink-muted);
  font-style: italic;
}
.card-scope {
  margin-top: var(--space-5);
  display: grid;
  gap: var(--space-3);
  flex: 1;
}
.card-scope li {
  position: relative;
  padding-left: 1.375rem;
  font-size: var(--fs-small);
}
.card-scope li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 0.625rem;
  height: var(--line-w);
  background: var(--color-brand);
}
/* Na E2–E4 este link passa a apontar para a página do nicho */
.card-link {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem; /* 44px: alvo de toque confortável no celular */
  margin-top: var(--space-5);
  font-family: var(--font-title);
  font-size: var(--fs-small);
  font-weight: 600;
  text-decoration: none;
  color: var(--color-brand);
}
.card-link::after {
  content: " \2192";
  transition: margin-left var(--dur) var(--ease);
}
.card-link:hover::after { margin-left: 0.375rem; }

/* --- Como funciona: o ciclo (elemento de assinatura) ------- */
.section-cycle { overflow: hidden; }

.cycle { position: relative; }
.cycle-steps {
  position: relative;
  display: grid;
  gap: var(--space-6);
}

/* trilho contínuo (desenhado por pseudo-elementos por breakpoint) */
.cycle-step { position: relative; padding-left: 3.5rem; }
.cycle-node {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 1;
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: var(--fs-small);
  color: var(--color-brand);
  background: var(--color-surface);
  border: 2px solid var(--color-brand);
  border-radius: 50%;
}
.cycle-title { font-size: var(--fs-h3); padding-top: 0.375rem; }
.cycle-text {
  margin-top: var(--space-2);
  font-size: var(--fs-small);
  color: var(--color-ink-muted);
  max-width: 17rem;
}

.cycle-restart {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-title);
  font-weight: 600;
  color: var(--color-brand-dark);
}
.cycle-restart svg { color: var(--color-accent); flex: none; }

/* Mobile: trilho vertical atravessando os nós */
.cycle-steps::before {
  content: "";
  position: absolute;
  top: 1.25rem;
  bottom: 0;
  left: calc(1.25rem - 1px);
  width: 2px;
  background: var(--color-steel-light);
}
/* Mobile: o trilho continua tracejado do passo 4 até o fecho,
   mantendo o ciclo visualmente fechado */
.cycle-return { position: relative; padding-top: var(--space-6); }
.cycle-return::before {
  content: "";
  position: absolute;
  top: 0;
  height: var(--space-6);
  left: calc(1.25rem - 1px);
  border-left: 2px dashed var(--color-steel-light);
}
.cycle-restart {
  position: relative;
  align-items: flex-start;
  padding-left: 3.5rem;
}
.cycle-restart svg { position: absolute; left: calc(1.25rem - 10px); top: 0; }

/* --- Comparativo ------------------------------------------- */
.section-compare .compare {
  display: grid;
  gap: var(--space-4);
}
.compare-head {
  display: none; /* mobile: cada item carrega a própria etiqueta (.compare-tag) */
  font-family: var(--font-title);
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.compare-head--without { color: var(--color-ink-muted); }
.compare-head--with    { color: var(--color-brand); }

.compare-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  align-items: start;
  padding: var(--space-4);
  border: var(--line-w) solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
  font-size: var(--fs-small);
}
.compare-item svg { flex: none; margin-top: 0.2em; }
.compare-item--without { color: var(--color-ink-muted); }
.compare-item--without svg { color: var(--color-ink-muted); }
.compare-item--with {
  border-color: var(--color-steel-light);
  background: var(--color-brand-tint);
  color: var(--color-ink);
}
.compare-item--with svg { color: var(--color-brand); }

/* Rótulo "Sem/Com" visível só no mobile (colunas empilhadas) */
.compare-tag {
  display: block;
  font-family: var(--font-title);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-1);
}
.compare-item--without .compare-tag { color: var(--color-ink-muted); }
.compare-item--with .compare-tag    { color: var(--color-brand); }

/* --- CTA final --------------------------------------------- */
.cta-band {
  position: relative;
  overflow: hidden;
  background: var(--color-brand-dark);
  color: var(--color-on-brand);
  background-image:
    linear-gradient(var(--color-grid-on-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid-on-dark) 1px, transparent 1px);
  background-size: 72px 72px;
}
/* Chevron do símbolo usado isolado — o manual autoriza explicitamente
   ("pode ser estruturado sua composição completa como sua forma separada").
   SVG inline em data-URI: nenhuma requisição extra. */
.cta-band::after {
  content: "";
  position: absolute;
  right: -3rem;
  bottom: -4rem;
  width: 26rem;
  height: 26rem;
  pointer-events: none;
  opacity: 0.1;
  background: no-repeat center / contain
    url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 37.43 16.64"><path d="M0 16.64V9.9L20.08 0l17.35 8.75v6.45L20.22 6.46Z" fill="%23ffffff"/></svg>');
}
.cta-band > .container { position: relative; z-index: 1; }
.cta-band .section-title { color: var(--color-on-brand); }
.cta-band .label { color: var(--color-steel-light); } /* a barra dupla herda via currentColor */
.cta-text {
  margin-top: var(--space-4);
  color: var(--color-steel-light);
  font-size: var(--fs-lead);
  max-width: 34rem;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-6);
}
.cta-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 var(--space-6);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--line-w) solid var(--color-line-on-dark);
}
.cta-contact a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 2.75rem; /* 44px: alvo de toque confortável no celular */
  color: var(--color-on-brand);
  text-decoration: none;
  font-family: var(--font-title);
  font-weight: 600;
  font-size: var(--fs-small);
}
.cta-contact svg { flex: none; width: 1.125rem; height: 1.125rem; }
.cta-contact a:hover { text-decoration: underline; }

/* --- Rodapé ------------------------------------------------ */
.site-footer {
  background: var(--color-brand-dark);
  color: var(--color-steel-light);
  padding-block: var(--space-8) var(--space-6);
  border-top: var(--line-w) solid var(--color-line-on-dark);
  font-size: var(--fs-small);
}
.footer-grid {
  display: grid;
  gap: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: var(--line-w) solid var(--color-line-on-dark);
}
.site-footer .brand-lur { color: var(--color-on-brand); }
.site-footer .brand-ion { color: var(--color-steel-light); }
.site-footer .brand-tag { color: var(--color-steel-light); }
.site-footer .brand-mark-roof,
.site-footer .brand-mark-left  { fill: var(--color-on-brand); }
.site-footer .brand-mark-small,
.site-footer .brand-mark-right { fill: var(--color-steel-light); }
.footer-meta { display: grid; gap: var(--space-2); }
.footer-meta a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 2.5rem; /* alvo de toque confortável no celular */
  color: var(--color-on-brand);
  text-decoration: none;
}
.footer-meta a:hover { text-decoration: underline; }

/* Lista de contatos com ícone (rodapé das duas páginas) */
.contact-list { display: grid; gap: var(--space-1); margin-top: var(--space-2); }
.contact-list svg { flex: none; width: 1.0625rem; height: 1.0625rem; color: var(--color-steel-light); }
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 var(--space-5);
  padding-top: var(--space-4);
}
.footer-legal a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  color: var(--color-steel-light);
}

/* --- Página interna (política de privacidade) -------------- */
.page-header {
  padding-top: calc(var(--header-h) + var(--space-7));
  padding-bottom: var(--space-7);
  background: var(--color-surface-alt);
  border-bottom: var(--line-w) solid var(--color-line);
}
.page-title { font-size: var(--fs-h2); margin-top: var(--space-4); }
.prose { max-width: 46rem; padding-block: var(--space-7) var(--space-section); }
.prose h2 {
  font-size: var(--fs-h3);
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: var(--line-w) solid var(--color-line);
}
.prose h2:first-of-type { margin-top: var(--space-5); }
.prose p, .prose ul { margin-top: var(--space-4); color: var(--color-ink-muted); }
.prose ul { padding-left: 1.25rem; }
.prose li + li { margin-top: var(--space-2); }
.prose strong { color: var(--color-ink); font-weight: 500; }

/* --- Reveal (entrada de seção) -----------------------------
   Só esconde o conteúdo quando há JavaScript para revelá-lo
   (a classe .js é escrita pelo próprio documento no <head>).
   Sem JS, tudo nasce visível. */
@media (prefers-reduced-motion: no-preference) {
  .js .reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 600ms var(--ease), transform 600ms var(--ease);
  }
  .js .reveal.is-visible { opacity: 1; transform: none; }
}

/* ============================================================
   Breakpoints: mobile-first · 640 · 900 · 1200
   ============================================================ */

/* --- ≥640px ------------------------------------------------ */
@media (min-width: 640px) {
  /* 2 colunas: cada rótulo precisa abrir o próprio grupo. Como os
     rótulos vêm antes dos cards no HTML, a linha é dada explicitamente. */
  .segment-grid { grid-template-columns: 1fr 1fr; }
  .segment-group-label--a { grid-column: 1 / -1; grid-row: 1; }
  .segment-grid > .card-segment:nth-of-type(1) { grid-row: 2; grid-column: 1; }
  .segment-grid > .card-segment:nth-of-type(2) { grid-row: 2; grid-column: 2; }
  .segment-group-label--b { grid-column: 1 / -1; grid-row: 3; margin-top: var(--space-5); }
  .segment-grid > .card-segment:nth-of-type(3) { grid-row: 4; grid-column: 1; }

  .seal-list { grid-template-columns: repeat(3, 1fr); }
  .seal { grid-template-columns: none; gap: var(--space-3); }

  .compare {
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
  }
  .compare-head { display: block; }
  .compare-tag { display: none; }

  .footer-grid { grid-template-columns: 1fr 1fr; align-items: start; }
}

/* --- ≥900px ------------------------------------------------ */
@media (min-width: 900px) {
  .nav-toggle { display: none; }

  /* Entre 900 e 1200 o header é apertado: a assinatura do logo sai
     e o menu fecha o passo para tudo caber em uma linha */
  .brand-tag { display: none; }
  .nav-list { gap: var(--space-4); }

  .about-grid { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); align-items: start; }
  .seal-list {
    grid-template-columns: none;
    border-top: 0;
    border-left: var(--line-w) solid var(--color-line);
    padding-top: 0;
    padding-left: var(--space-6);
  }
  .seal { grid-template-columns: auto 1fr; }

  /* 3 colunas: os dois rótulos dividem a mesma linha, cada um sobre
     o seu grupo; os três cards ocupam a linha seguinte */
  .segment-grid { grid-template-columns: repeat(3, 1fr); }
  .segment-group-label--a { grid-column: 1 / 3; grid-row: 1; margin-top: 0; }
  .segment-group-label--b { grid-column: 3 / 4; grid-row: 1; margin-top: 0; }
  .segment-grid > .card-segment:nth-of-type(1) { grid-row: 2; grid-column: 1; }
  .segment-grid > .card-segment:nth-of-type(2) { grid-row: 2; grid-column: 2; }
  .segment-grid > .card-segment:nth-of-type(3) { grid-row: 2; grid-column: 3; }

  /* Ciclo: horizontal. Trilho passa pelos centros dos nós
     (nó centrado em cada coluna → centros em 12.5% e 87.5%) */
  .cycle-steps {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-5);
    text-align: center;
  }
  .cycle-step { padding-left: 0; }
  .cycle-node { position: relative; margin-inline: auto; }
  .cycle-title { margin-top: var(--space-4); padding-top: 0; }
  .cycle-text { margin-inline: auto; }
  /* centro do 1º/4º nó: metade de uma coluna → (100% − 3 gaps) / 8 */
  .cycle-steps::before {
    top: calc(1.25rem - 1px);
    bottom: auto;
    left: calc((100% - 4.5rem) / 8);
    right: calc((100% - 4.5rem) / 8);
    width: auto;
    height: 2px;
    background: var(--color-steel-light);
  }
  /* Retorno do ciclo: faixa abaixo das etapas com "U" tracejado
     que volta do lado do nó 4 para o lado do nó 1 */
  .cycle-return {
    position: relative;
    height: 5.5rem;
    padding-top: 0;
    margin-top: var(--space-5);
  }
  .cycle-return::before {
    content: "";
    position: absolute;
    height: auto;
    inset: 0 calc((100% - 4.5rem) / 8) 1.25rem calc((100% - 4.5rem) / 8);
    border: 2px dashed var(--color-steel-light);
    border-top: 0;
    border-radius: 0 0 14px 14px;
  }
  /* seta apontando de volta para cima, rumo ao nó 1 */
  .cycle-return::after {
    content: "";
    position: absolute;
    top: -4px;
    left: calc((100% - 4.5rem) / 8 - 5px);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 9px solid var(--color-accent);
  }
  .cycle-restart {
    position: absolute;
    inset: auto 0 0 0;
    align-items: center;
    padding-left: 0;
    justify-content: center;
  }
  .cycle-restart span,
  .cycle-restart svg {
    position: static;
    background: var(--color-surface); /* mascara a linha do "U" atrás do fecho */
  }
  .cycle-restart span { padding-inline: var(--space-3); }

  .hero-actions, .cta-actions { gap: var(--space-4); }
}

/* --- ≥1200px ----------------------------------------------- */
@media (min-width: 1200px) {
  .brand-tag { display: inline; }
  .nav-list { gap: var(--space-5); }
  .about-grid { gap: var(--space-8); }
  .cycle-text { max-width: 15rem; }
}

/* --- Mobile: navegação em overlay -------------------------- */
@media (max-width: 899.98px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    z-index: 40;
    background: var(--color-surface);
    border-bottom: var(--line-w) solid var(--color-line);
    padding: var(--space-4) var(--container-pad) var(--space-6);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity var(--dur) var(--ease),
                transform var(--dur) var(--ease),
                visibility 0s linear var(--dur);
  }
  .site-nav.is-open {
    visibility: visible;
    opacity: 1;
    transform: none;
    transition-delay: 0s;
  }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-link {
    display: block;
    padding: var(--space-4) 0;
    border-bottom: var(--line-w) solid var(--color-line);
    font-size: var(--fs-body);
  }
  .nav-link:hover { border-bottom-color: var(--color-line); }

  /* menu aberto exige header sólido */
  .site-header.is-open {
    background: var(--color-surface);
    border-bottom-color: var(--color-line);
  }

  /* WhatsApp sempre visível no mobile: botão compacto no header */
  .header-actions .btn-primary {
    padding: 0.625rem 0.875rem;
    font-size: var(--fs-small);
  }
  .header-actions .btn-label { display: none; }

  .brand-tag { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}