/*
 * Agenc.IA design system — "arquitetura inteligente"
 * Base grafite, amarelo vibrante como sinal tecnico, texturas de blueprint.
 * Nunca use cores fixas nos componentes — sempre as variaveis abaixo.
 */

/* ── TOKENS ─────────────────────────────────────────────── */
:root {
  --radius: 3px;

  --graphite-deep: oklch(0.17 0.005 260);
  --graphite: oklch(0.21 0.006 260);
  --graphite-raised: oklch(0.25 0.006 260);

  --background: var(--graphite-deep);
  --foreground: oklch(0.96 0.004 100);

  --card: var(--graphite);
  --card-foreground: oklch(0.96 0.004 100);

  --signal: oklch(0.88 0.19 98);
  --signal-foreground: oklch(0.18 0.005 260);

  --muted-foreground: oklch(0.66 0.005 260);

  --line: oklch(1 0 0 / 7%);
  --line-strong: oklch(1 0 0 / 16%);
  --input: oklch(1 0 0 / 14%);

  --font-sans: "Figtree", ui-sans-serif, system-ui, sans-serif;
  --font-display: "Outfit", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --grid-unit: 32px;
}

/* ── BASE ───────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  border: 0 solid var(--line-strong);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--signal);
  color: var(--signal-foreground);
}

/* ── ACESSIBILIDADE ─────────────────────────────────────── */

/*
 * Texto lido por leitores de tela e invisivel na tela. Nao use
 * display:none nem visibility:hidden: os dois escondem tambem do
 * leitor de tela, que e justamente quem precisa ler.
 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* Primeiro Tab da pagina: pula o cabecalho e vai direto ao conteudo. */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  transform: translateY(-120%);
  background: var(--signal);
  color: var(--signal-foreground);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.875rem 1.25rem;
  border-radius: 0 0 var(--radius) 0;
  transition: transform 0.18s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

/*
 * Anel de foco unico para tudo que recebe teclado. :focus-visible
 * so aparece para quem navega por teclado — o clique de mouse
 * continua limpo.
 */
:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: var(--radius);
}

/* O <main> recebe foco pelo skip link, mas nao precisa de anel. */
[tabindex="-1"]:focus {
  outline: none;
}

/* Alvo de toque minimo de 44px nos links do cabecalho. */
.site-header__nav a,
.site-header__brand {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

/* Quem prefere mais contraste ganha linhas e texto mais firmes. */
@media (prefers-contrast: more) {
  :root {
    --muted-foreground: oklch(0.82 0.005 260);
    --line: oklch(1 0 0 / 22%);
    --line-strong: oklch(1 0 0 / 42%);
    --input: oklch(1 0 0 / 45%);
  }
}

h1, h2, h3, p, ul, ol, fieldset, legend, figure {
  margin: 0;
  padding: 0;
}

ul, ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button,
input,
textarea {
  font: inherit;
  color: inherit;
}

/* ── TEXTURAS DE BLUEPRINT ──────────────────────────────── */
.blueprint-layer {
  pointer-events: none;
  position: absolute;
  inset: 0;
}

.blueprint {
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: var(--grid-unit) var(--grid-unit);
}

.blueprint-fine {
  background-image:
    linear-gradient(to right, var(--line-strong) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-strong) 1px, transparent 1px),
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size:
    calc(var(--grid-unit) * 5) calc(var(--grid-unit) * 5),
    calc(var(--grid-unit) * 5) calc(var(--grid-unit) * 5),
    var(--grid-unit) var(--grid-unit),
    var(--grid-unit) var(--grid-unit);
}

.blueprint-fade {
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, oklch(0 0 0) 20%, transparent 100%);
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, oklch(0 0 0) 20%, transparent 100%);
}

.opacity-60 { opacity: 0.6; }
.opacity-70 { opacity: 0.7; }

/* ── SISTEMA TIPOGRAFICO ────────────────────────────────── */
.label-tech {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

.display-xl {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 0.95;
  font-size: clamp(2.75rem, 7.5vw, 5.75rem);
}

.display-lg {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  font-size: clamp(2rem, 4.5vw, 3.25rem);
}

.marker {
  background: linear-gradient(
    to bottom,
    transparent 12%,
    color-mix(in oklab, var(--signal) 85%, transparent) 12%,
    color-mix(in oklab, var(--signal) 85%, transparent) 92%,
    transparent 92%
  );
  color: var(--signal-foreground);
  padding-inline: 0.15em;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

.text-signal { color: var(--signal); }
.text-muted { color: var(--muted-foreground); }

/* ── MICRO-ELEMENTOS DE INTERFACE ───────────────────────── */
.bbox {
  position: relative;
}

.bbox::before,
.bbox::after {
  content: "";
  position: absolute;
  width: 7px;
  height: 7px;
  border: 1px solid var(--signal);
}

.bbox::before {
  top: -1px;
  left: -1px;
  border-right-color: transparent;
  border-bottom-color: transparent;
}

.bbox::after {
  right: -1px;
  bottom: -1px;
  border-left-color: transparent;
  border-top-color: transparent;
}

.node-dot {
  display: block;
  flex-shrink: 0;
  width: 7px;
  height: 7px;
  background: var(--signal);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--signal) 18%, transparent);
}

.btn-signal {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--signal);
  color: var(--signal-foreground);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 1rem 1.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}

.btn-signal:hover {
  filter: brightness(1.06);
  box-shadow: 0 0 0 1px var(--signal), 0 12px 32px -12px color-mix(in oklab, var(--signal) 55%, transparent);
  transform: translateY(-1px);
}

.btn-outline-tech {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  border: 1px solid var(--line-strong);
  color: var(--foreground);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 1rem 1.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.btn-outline-tech:hover {
  border-color: var(--signal);
  color: var(--signal);
}

.panel {
  background: color-mix(in oklab, var(--graphite) 82%, transparent);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

.field-tech {
  display: block;
  width: 100%;
  background: var(--graphite-deep);
  border: 1px solid var(--input);
  border-radius: var(--radius);
  padding: 0.875rem 1rem;
  font-size: 0.9375rem;
  font-family: var(--font-sans);
  color: var(--foreground);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field-tech::placeholder {
  color: color-mix(in oklab, var(--muted-foreground) 75%, transparent);
}

.field-tech:focus {
  outline: none;
  border-color: var(--signal);
  box-shadow: 0 0 0 1px var(--signal);
}

.scan-line {
  background: linear-gradient(to right, transparent, var(--signal) 45%, var(--signal) 55%, transparent);
}

@keyframes draw-in {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

.draw-in {
  animation: draw-in 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes trace {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.trace {
  animation: trace 3.6s linear infinite;
}

/* ── WORDMARK ───────────────────────────────────────────── */
.wordmark {
  display: inline-flex;
  align-items: baseline;
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1;
}

.wordmark__badge {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  margin-left: 0.06em;
  border: 1px solid var(--signal);
  padding: 0.1em 0.22em;
  color: var(--signal);
}

.wordmark__dot { font-size: 0.72em; line-height: 1; }
.wordmark__ia { line-height: 1; }

.wordmark__badge .corner {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--signal);
}

.wordmark__badge .corner--tl { left: -1px; top: -1px; }
.wordmark__badge .corner--br { right: -1px; bottom: -1px; }

.wordmark--sm { font-size: 1.125rem; }

/* ── COORD / LINHA DE CONSTRUCAO ────────────────────────── */
.coord {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.coord::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 4px;
  background: var(--signal);
}

.construction-line {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.construction-line__rule {
  height: 1px;
  flex: 1;
  background: var(--line-strong);
}

.construction-line .label-tech { flex-shrink: 0; }

/* ── HEADER ─────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line-strong);
  background: color-mix(in oklab, var(--background) 85%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.site-header__inner {
  margin: 0 auto;
  display: flex;
  max-width: 80rem;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* No mobile so o link importa; a coordenada some para caber. */
.site-header__nav .coord { display: none; }

.site-header__nav .js-form-link {
  white-space: nowrap;
  letter-spacing: 0.1em;
  color: var(--signal);
}

.site-header__nav a {
  transition: color 0.18s ease;
}

.site-header__nav a:hover { color: var(--signal); }

/* ── SHELL: conteudo + trilho fixo a direita ────────────── */
.shell {
  margin: 0 auto;
  display: flex;
  max-width: 80rem;
  gap: 2.5rem;
  padding: 0 1.5rem;
}

.shell__main {
  min-width: 0;
  flex: 1;
}

.shell__rail {
  display: none;
  width: 360px;
  flex-shrink: 0;
}

/*
 * O formulario costuma ser mais alto que a tela. Com um `top` fixo a
 * parte de baixo fica sempre cortada — so da para ver os ultimos campos
 * no fim da pagina. O JS ajusta `--rail-top` conforme a direcao da
 * rolagem: descendo, o trilho acompanha ate colar o rodape do formulario
 * na base da tela; subindo, volta a colar o topo. Sem JS, o valor padrao
 * mantem o comportamento antigo.
 */
.shell__rail-inner {
  position: sticky;
  top: var(--rail-top, 6rem);
  padding: 6rem 0;
}

/* ── SECOES ─────────────────────────────────────────────── */
.section {
  position: relative;
  border-bottom: 1px solid var(--line-strong);
}

.section--hero { overflow: hidden; }

.section--flow { background: var(--graphite); }

.section--form-mobile { border-bottom: 0; }

.section__inner {
  position: relative;
  padding: 6rem 0;
}

.hero__inner {
  position: relative;
  padding: 5rem 0 6rem;
}

.hero__scan {
  pointer-events: none;
  position: absolute;
  left: 0;
  right: 0;
  top: 33.333333%;
  height: 1px;
  overflow: hidden;
}

.hero__scan > div {
  height: 1px;
  width: 50%;
  opacity: 0.4;
}

.hero__content { max-width: 48rem; }

.hero__coords {
  margin-bottom: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  column-gap: 1.5rem;
  row-gap: 0.5rem;
}

.hero__lead {
  margin-top: 2rem;
  max-width: 42rem;
  font-size: 1.125rem;
  line-height: 1.625;
  color: var(--muted-foreground);
}

.hero__list {
  margin-top: 2.5rem;
  display: grid;
  max-width: 42rem;
  gap: 1px;
  border: 1px solid var(--line-strong);
}

.hero__list li {
  position: relative;
  background: color-mix(in oklab, var(--card) 60%, transparent);
  padding: 1.25rem;
  outline: 1px solid var(--line-strong);
}

.hero__list p {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  line-height: 1.375;
  color: var(--foreground);
}

.hero__note {
  margin-top: 2.5rem;
  max-width: 42rem;
  font-size: 1rem;
  color: var(--foreground);
}

.hero__note strong {
  font-weight: 600;
  color: var(--signal);
}

.hero__cta { margin-top: 2.5rem; }

/* ── MODULO 01 — OPERACAO ───────────────────────────────── */
.op__title {
  margin-top: 2.5rem;
  max-width: 48rem;
}

.op__grid {
  margin-top: 4rem;
  display: grid;
  gap: 1px;
}

.op__card { padding: 1.75rem; }

.op__card .q {
  margin-top: 1.25rem;
  font-size: 1.125rem;
  font-weight: 500;
  line-height: 1.375;
}

.op__card .a {
  margin-top: 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--signal);
}

.op__card .a::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--signal);
}

.op__closing {
  margin-top: 4rem;
  display: grid;
  gap: 2.5rem;
  border-top: 1px solid var(--line-strong);
  padding-top: 3rem;
}

.op__closing > p {
  font-size: 1.125rem;
  line-height: 1.625;
  color: var(--muted-foreground);
}

.op__punch {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

.op__closing .btn-outline-tech { margin-top: 2rem; }

/* ── MODULO 02 — FLUXO ──────────────────────────────────── */
.flow__steps {
  margin-top: 4rem;
  border-top: 1px solid var(--line-strong);
}

.flow__steps li {
  display: grid;
  gap: 1.5rem;
  border-bottom: 1px solid var(--line-strong);
  padding: 2.25rem 0;
  /* Cada passo e uma ancora (#passo-01...), citada tambem no HowTo
     dos dados estruturados: a margem impede que o cabecalho fixo
     cubra o passo ao chegar pelo link. */
  scroll-margin-top: 5.5rem;
}

.flow__n {
  font-family: var(--font-mono);
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--signal);
  line-height: 1.2;
}

.flow__title {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.flow__body {
  line-height: 1.625;
  color: var(--muted-foreground);
}

.flow__quote {
  margin-top: 1rem;
  border-left: 2px solid var(--signal);
  background: color-mix(in oklab, var(--background) 60%, transparent);
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--foreground);
}

/* ── FORMULARIO ─────────────────────────────────────────── */
.briefing {
  padding: 1.5rem;
  /* Ancoras param no inicio do formulario, logo abaixo do header fixo. */
  scroll-margin-top: 5.5rem;
}

.briefing__head {
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.briefing__title {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

.briefing__fields {
  margin-top: 1.25rem;
  display: grid;
  gap: 1rem;
}

.briefing__fields label,
.briefing__field,
.briefing__challenge,
.briefing__challenge label {
  display: block;
}

/* O asterisco de campo obrigatorio: sinal, nao decoracao. */
.briefing__req {
  color: var(--signal);
  margin-left: 0.25em;
}

.briefing__challenge { margin-top: 1rem; }

.briefing .field-tech { margin-top: 0.5rem; }

textarea.field-tech { resize: none; }

.briefing__caps {
  margin-top: 1.25rem;
  border: 0;
}

.briefing__caps-list {
  margin-top: 0.75rem;
  display: grid;
  gap: 0.375rem;
}

.cap {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.625rem;
  border: 1px solid var(--line-strong);
  padding: 0.5rem 0.625rem;
  text-align: left;
  font-size: 13px;
  color: var(--muted-foreground);
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.cap:hover { color: var(--foreground); }

.cap input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.cap__box {
  display: flex;
  width: 0.875rem;
  height: 0.875rem;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  font-size: 9px;
  font-weight: 700;
  color: transparent;
  line-height: 1;
}

.cap__label { flex: 1; }

/*
 * O numero e discreto, mas continua legivel: a 9px o contraste
 * minimo e 4.5:1, entao ele recua pela cor e nao por opacidade.
 */
.cap__n {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--muted-foreground);
}

.cap:has(input:checked) {
  border-color: var(--signal);
  color: var(--signal);
}

.cap:has(input:checked) .cap__box {
  border-color: var(--signal);
  background: var(--signal);
  color: var(--signal-foreground);
}

.cap:has(input:focus-visible) {
  outline: 1px solid var(--signal);
  outline-offset: 2px;
}

/* Campo-armadilha: fora da tela, mas nao escondido de robos com display:none */
.honeypot {
  position: absolute;
  left: -9999px;
  top: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.briefing__submit {
  margin-top: 1.25rem;
  width: 100%;
  justify-content: center;
  border: 0;
  text-align: center;
}

/*
 * Indicador de envio. Fica com largura zero em repouso para nao
 * empurrar o rotulo do botao; ao enviar, abre e comeca a girar.
 */
.briefing__spinner {
  width: 0;
  height: 14px;
  flex-shrink: 0;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-right-color: currentColor;
  border-radius: 50%;
  opacity: 0;
  transition: width 0.18s ease, opacity 0.18s ease;
}

.briefing__submit.is-enviando .briefing__spinner {
  width: 14px;
  opacity: 0.85;
  animation: girar 0.7s linear infinite;
}

@keyframes girar {
  to { transform: rotate(360deg); }
}

/*
 * Confirmacao. O check ocupa largura zero em repouso, igual ao
 * indicador de envio, e e desenhado da esquerda para a direita
 * quando o briefing chega — o mesmo traco do resto do site.
 */
.briefing__check {
  width: 0;
  height: 16px;
  flex-shrink: 0;
  overflow: visible;
  opacity: 0;
  transition: width 0.2s ease, opacity 0.2s ease;
}

.briefing__check path {
  stroke-dasharray: 32;
  stroke-dashoffset: 32;
}

.briefing__submit.is-enviado .briefing__check {
  width: 16px;
  opacity: 1;
}

.briefing__submit.is-enviado .briefing__check path {
  animation: riscar 0.45s cubic-bezier(0.65, 0, 0.35, 1) 0.1s forwards;
}

@keyframes riscar {
  to { stroke-dashoffset: 0; }
}

/* Quem pediu menos movimento nao ve o traco ser desenhado, mas
   continua vendo o check: o sinal importa mais que a animacao. */
@media (prefers-reduced-motion: reduce) {
  .briefing__submit.is-enviado .briefing__check path {
    animation: none;
    stroke-dashoffset: 0;
  }
}

/* Enquanto envia, o botao para de responder ao mouse: o clique ja
   foi registrado e um segundo envio so geraria erro de limite. */
.briefing__submit:disabled {
  cursor: progress;
  filter: brightness(0.92);
}

.briefing__submit:disabled:hover {
  transform: none;
  box-shadow: none;
  filter: brightness(0.92);
}

.briefing__legal {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.625;
  color: var(--muted-foreground);
}

.briefing__status {
  margin-top: 1.25rem;
  border-left: 2px solid var(--signal);
  background: color-mix(in oklab, var(--background) 60%, transparent);
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--foreground);
}

.briefing__status--error {
  border-left-color: oklch(0.62 0.2 25);
}

/* ── RODAPE ─────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--line-strong);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem 0;
}

/* ── FAQ ────────────────────────────────────────────────── */
.faq {
  margin-top: 3rem;
  display: grid;
  gap: 0.75rem;
}

.faq__item {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: color-mix(in oklab, var(--graphite) 55%, transparent);
}

.faq__q {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.0625rem;
  line-height: 1.35;
  transition: color 0.18s ease;
}

/* Remove o triangulo padrao do <details> no Safari e no Chrome. */
.faq__q::-webkit-details-marker { display: none; }

.faq__q:hover { color: var(--signal); }

.faq__n {
  flex-shrink: 0;
  opacity: 0.6;
}

/* Cruz que vira "menos" quando a resposta abre. */
.faq__sinal {
  position: relative;
  flex-shrink: 0;
  margin-left: auto;
  width: 14px;
  height: 14px;
}

.faq__sinal::before,
.faq__sinal::after {
  content: "";
  position: absolute;
  inset: 50% 0 auto 0;
  height: 1px;
  background: var(--signal);
  transition: transform 0.2s ease;
}

.faq__sinal::after {
  transform: rotate(90deg);
}

.faq__item[open] .faq__sinal::after {
  transform: rotate(0deg);
}

.faq__item[open] .faq__q { color: var(--signal); }

.faq__a {
  padding: 0 1.5rem 1.5rem;
  color: var(--muted-foreground);
  max-width: 62ch;
}

/*
 * Renderizacao preguicosa: o navegador so calcula layout e pintura
 * das secoes abaixo da dobra quando elas chegam perto da tela. O
 * contain-intrinsic-size reserva a altura estimada para a barra de
 * rolagem nao dar pulos.
 */
.section--lazy {
  content-visibility: auto;
  /* O "auto" guarda a altura real depois da primeira pintura, entao
     a barra de rolagem para de pular. 800px e so o palpite inicial. */
  contain-intrinsic-size: auto 800px;
}

/* Na impressao tudo precisa existir de uma vez, nao so o visivel. */
@media print {
  .section--lazy {
    content-visibility: visible;
    contain-intrinsic-size: none;
  }
}

/* ── BREAKPOINTS ────────────────────────────────────────── */
@media (min-width: 640px) {
  .hero__list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
  .site-header__nav { gap: 2rem; }
  .site-header__nav .coord { display: inline-flex; }
  .site-header__nav .js-form-link {
    letter-spacing: 0.18em;
    color: var(--muted-foreground);
  }
  .section__inner { padding: 8rem 0; }
  .hero__inner { padding: 7rem 0 8rem; }
  .hero__lead { font-size: 1.25rem; }
  .hero__note { font-size: 1.125rem; }
  .op__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .op__punch { font-size: 1.875rem; }
  .flow__steps li {
    grid-template-columns: 6rem 1fr 1.2fr;
    gap: 2.5rem;
  }
  .flow__title { font-size: 1.5rem; }
  .briefing { padding: 1.75rem; }
}

@media (min-width: 1024px) {
  .shell__rail { display: block; }
  .section--form-mobile { display: none; }
}

@media (min-width: 768px) {
  .faq__q { font-size: 1.1875rem; padding: 1.5rem 1.75rem; }
  .faq__a { padding: 0 1.75rem 1.75rem; }
}

/*
 * Quem pediu menos movimento no sistema operacional nao recebe
 * animacao nem rolagem suave — inclusive as transicoes, que ficam
 * praticamente instantaneas em vez de sumirem (o estado final
 * continua sendo aplicado).
 */
@media (prefers-reduced-motion: reduce) {
  .draw-in, .trace { animation: none; }
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}