/* ==========================================================================
   components.css — peças reutilizáveis da interface
   Ordem: navegação · botões · rótulos · marquee · contadores ·
          dashboards demonstrativos · mockups · vídeo · depoimentos · FAQ
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Cabeçalho e navegação
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(255, 255, 255, 0.93);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(233, 228, 238, 0.8);
  transition: transform var(--transition-base);
}

/* Some ao descer a página (assets/js/header-scroll.js), volta ao subir.
   translateY não afasta o layout — o header continua sticky, só desliza
   visualmente pra fora, sem empurrar o conteúdo abaixo dele. */
.site-header--hidden {
  transform: translateY(-100%);
}

/* Nunca esconde com algo dentro do header focado (navegação por teclado). */
.site-header.site-header--hidden:focus-within {
  transform: translateY(0);
}

.site-header__inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
}

.brand-logo img {
  width: 150px;
  max-height: 46px;
  object-fit: contain;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text);
}

.nav-desktop a {
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  white-space: nowrap; /* "White Label" e "Como funciona" quebravam em duas
                            linhas e desalinhavam a barra inteira */
  transition:
    color var(--transition-fast),
    border-color var(--transition-fast);
}

.nav-desktop a:hover,
.nav-desktop a[aria-current="true"] {
  color: var(--color-action-ink); /* 6.17:1 — era 4.40:1 */
  border-bottom-color: var(--color-action);
}

.site-header__cta {
  flex: 0 0 auto;
}

/* Botão hamburger — só aparece no breakpoint mobile (responsive.css) */
.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--color-line);
  border-radius: var(--border-radius-sm);
  background: var(--color-surface-raised);
  place-items: center;
  flex: 0 0 auto;
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-ink);
  transition:
    transform var(--transition-fast),
    opacity var(--transition-fast);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: relative;
}

.nav-toggle__bars::before {
  top: -6px;
}
.nav-toggle__bars::after {
  top: 4px;
}

.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(-4px) rotate(-45deg);
}

/* Painel do menu mobile */
.nav-mobile {
  position: fixed;
  inset: var(--header-height) 0 0;
  z-index: var(--z-mobile-menu);
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 24px var(--container-gutter) 40px;
  background: var(--color-surface-raised);
  overflow-y: auto;
  transform: translateY(-12px);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--transition-base),
    transform var(--transition-base),
    visibility var(--transition-base);
}

.nav-mobile[data-open="true"] {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.nav-mobile a {
  padding: 16px 4px;
  border-bottom: 1px solid var(--color-line);
  font-size: 18px;
  font-weight: 800;
}

.nav-mobile .btn {
  margin-top: 20px;
  border-bottom: 0;
}

body[data-menu-open="true"] {
  overflow: hidden;
}

/* --------------------------------------------------------------------------
   2. Botões (3 CTAs padronizados — ver README)
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 20px;
  border-radius: 14px;
  font-weight: 800;
  font-size: 14px;
  text-align: center;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

/* CTA principal — "Quero ter meu clube" */
.btn--primary {
  background: var(--gradient-action);
  color: var(--color-on-brand);
  box-shadow: var(--shadow-button);
}

.btn--primary:hover {
  transform: translateY(-2px);
}

/* CTA secundário — "Falar com um consultor" */
.btn--secondary {
  border: 1px solid var(--color-line);
  background: var(--color-surface-raised);
  color: var(--color-ink);
}

.btn--secondary:hover {
  border-color: var(--color-action);
  color: var(--color-action-ink);
}

/* CTA exploratório — "Explorar funcionalidades" */
.btn--ghost {
  border: 1px solid transparent;
  background: var(--color-action-wash);
  color: var(--color-action-ink);
}

.btn--ghost:hover {
  background: var(--purple-wash-strong);
}

/* Variantes sobre fundos escuros/coloridos.
   O primário é sólido; o secundário é contorno. Dois pills brancos lado a lado
   anulavam a hierarquia — não dava para saber qual era a ação principal. */
.btn--light {
  background: var(--color-surface-raised);
  color: var(--color-action-ink);
  box-shadow: 0 10px 26px rgba(15, 10, 20, 0.28);
}

.btn--light:hover {
  transform: translateY(-2px);
}

.cta__box .btn--secondary,
.support .btn--secondary,
.product .btn--secondary {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.55);
  color: var(--color-on-brand);
}

.cta__box .btn--secondary:hover,
.support .btn--secondary:hover,
.product .btn--secondary:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: var(--color-on-brand);
  color: var(--color-on-brand);
}

.btn--block {
  width: 100%;
}

/* --------------------------------------------------------------------------
   3. Rótulos e microtipografia
   -------------------------------------------------------------------------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 11px;
  border-radius: var(--border-radius-pill);
  background: var(--color-action-wash);
  color: var(--color-action-ink);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.7px;
}

.pill {
  font-size: var(--font-size-micro);
  font-weight: 800;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-line-strong);
  color: var(--color-text-muted);
  border-radius: var(--border-radius-pill);
  padding: 5px 8px;
}

.demo-note {
  font-size: var(--font-size-micro);
  color: var(--color-text-muted);
  margin-top: 9px;
}

/* --------------------------------------------------------------------------
   4. Marquee de marcas parceiras
   -------------------------------------------------------------------------- */

.marquee {
  position: relative;
  overflow: hidden;
  /* Fade nas bordas: o loop nunca "aparece" começando.
     #000 aqui é opacidade de máscara, não cor — não passa por token. */
  -webkit-mask-image: linear-gradient(
    90deg,
    transparent,
    #000 8%,
    #000 92%,
    transparent
  );
  mask-image: linear-gradient(
    90deg,
    transparent,
    #000 8%,
    #000 92%,
    transparent
  );
}

.marquee__track {
  display: flex;
  align-items: center;
  gap: 40px;
  width: max-content;
  animation: marquee-scroll var(--marquee-duration) linear infinite;
}

/* will-change é dica pontual para uma animação conhecida, não estado de
   repouso. Só vale enquanto a faixa realmente se move: com movimento
   reduzido a animação está desligada e a camada extra seria memória à toa. */
@media (prefers-reduced-motion: no-preference) {
  .marquee__track {
    will-change: transform;
  }
}

/* Pausa no hover apenas em dispositivos com ponteiro fino (desktop) */
@media (hover: hover) and (pointer: fine) {
  .marquee:hover .marquee__track,
  .marquee:focus-within .marquee__track {
    animation-play-state: paused;
  }
}

@keyframes marquee-scroll {
  from {
    transform: translate3d(0, 0, 0);
  }
  to {
    transform: translate3d(-50%, 0, 0);
  }
}

.partner-card {
  flex: 0 0 auto;
  width: 158px;
  height: 76px;
  display: grid;
  place-items: center;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-line);
  border-radius: 14px;
  padding: 12px 16px;
}

.partner-card img {
  width: 100%;
  height: 40px;
  object-fit: contain;
  filter: grayscale(1);
  opacity: 0.74;
  transition:
    filter var(--transition-base),
    opacity var(--transition-base);
}

@media (hover: hover) and (pointer: fine) {
  .partner-card:hover img {
    filter: none;
    opacity: 1;
  }
}

/* --------------------------------------------------------------------------
   5. Prova de escala / contadores animados
   -------------------------------------------------------------------------- */

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 56px;
  width: 100%;
}

.metric-card {
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.98),
    rgba(249, 247, 252, 0.94)
  );
  border: 1px solid rgba(142, 105, 173, 0.18);
  border-radius: 28px;
  padding: 30px 28px;
  box-shadow: 0 18px 45px rgba(45, 30, 60, 0.1);
}

/* Número + unidade alinhados pela baseline — é isso que mantém o "mil"
   colado ao número em qualquer tamanho de tela. */
/* nowrap mantém "18" e "mil" na mesma linha. Combinado com o clamp abaixo,
   um número maior (7 dígitos, por exemplo) encolhe a fonte em vez de vazar
   do card. */
.metric-card__value {
  display: flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  max-width: 100%;
  color: var(--color-action);
  font-size: clamp(64px, 7vw, 104px);
  line-height: 0.88;
  font-weight: 900;
  letter-spacing: -5px;
}

.metric-card__number {
  font-variant-numeric: tabular-nums;
  min-width: 0;
}

.metric-card__unit {
  font-size: 30px;
  line-height: 1;
  font-weight: 900;
  letter-spacing: -1px;
  text-transform: lowercase;
  color: var(--color-evidence-ink);
}

.metric-card__label {
  display: block;
  font-size: 14px;
  line-height: 1.25;
  color: var(--color-text);
  margin-top: 18px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

/* --------------------------------------------------------------------------
   6. Dashboards demonstrativos (usados em Recursos e Telemedicina)
   -------------------------------------------------------------------------- */

.dash-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 22px;
  padding: 16px;
}

.dash-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
}

.dash-toolbar b {
  font-size: 13px;
}

.kpi-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 10px;
}

.kpi {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-line);
  border-radius: 13px;
  padding: 12px;
}

.kpi small {
  display: block;
  color: var(--color-text-muted); /* 5.47:1 — era 4.40:1 */
  font-size: var(--font-size-micro);
}

.kpi strong {
  display: block;
  font-size: 18px;
  margin: 3px 0;
}

.kpi em {
  font-style: normal;
  color: var(--color-evidence-ink); /* 4.98:1 — era 3.39:1 */
  font-size: var(--font-size-micro);
  font-weight: 900;
}

.chart-box {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-line);
  border-radius: 14px;
  padding: 13px;
}

.bars {
  height: 120px;
  display: flex;
  align-items: flex-end;
  gap: 7px;
  border-bottom: 1px solid var(--color-line);
}

.bars i {
  flex: 1;
  border-radius: 5px 5px 0 0;
  background: var(--gradient-bar);
}

.donut-grid {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 16px;
  align-items: center;
}

/* Os três segmentos se separam por LUMINOSIDADE, não só por matiz: escuro,
   médio, claro. Continuam legíveis em escala de cinza e em daltonismo. */
.donut {
  width: 112px;
  height: 112px;
  border-radius: 50%;
  margin: auto;
  position: relative;
  background: conic-gradient(
    var(--color-action-ink) 0 42%,
    var(--color-evidence) 42% 74%,
    var(--n-400) 74% 100%
  );
}

.donut::after {
  content: "";
  position: absolute;
  inset: 24px;
  background: var(--color-surface-raised);
  border-radius: 50%;
}

.legend {
  display: grid;
  gap: 7px;
  font-size: var(--font-size-micro);
  color: var(--color-text-muted);
}

/* Marcador que amarra cada linha da legenda ao seu segmento na rosca.
   Só os três primeiros spans são segmentos; do quarto em diante a lista é
   "Top categorias", que não tem correspondência no gráfico. */
.donut-grid .legend > span {
  display: flex;
  align-items: center;
  gap: 7px;
}

.donut-grid .legend > span:nth-of-type(-n + 3)::before {
  content: "";
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  border-radius: 3px;
}

.donut-grid .legend > span:nth-of-type(1)::before {
  background: var(--color-action-ink);
}
.donut-grid .legend > span:nth-of-type(2)::before {
  background: var(--color-evidence);
}
.donut-grid .legend > span:nth-of-type(3)::before {
  background: var(--n-400);
}

.legend hr {
  width: 100%;
  border: 0;
  border-top: 1px solid var(--color-line);
}

.ledger,
.tree {
  display: grid;
  gap: 7px;
}

.ledger-row,
.tree-row {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-line);
  border-radius: 11px;
  padding: 10px;
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  font-size: var(--font-size-micro);
  align-items: center;
}

.tree-row {
  grid-template-columns: 30px 1fr auto;
}

.avatar {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--purple-tint), var(--teal-tint));
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: var(--font-size-micro);
  color: var(--color-action-ink); /* 4.76:1 sobre o lilás — era 3.42:1 */
}

/* Chat do agente de IA */
.chat {
  background: var(--color-surface-sunken);
  border-radius: 16px;
  padding: 12px;
  display: grid;
  gap: 8px;
  align-content: start;
  min-height: 225px;
}

.chat__msg {
  max-width: 86%;
  padding: 9px 11px;
  border-radius: 12px;
  font-size: var(--font-size-micro);
  line-height: 1.45;
}

.chat__msg--user {
  margin-left: auto;
  background: var(--teal-tint);
}

.chat__msg--bot {
  background: var(--color-surface-raised);
}

.chat__actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.chat__actions span {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--border-radius-pill);
  padding: 6px 9px;
  font-size: var(--font-size-micro);
  font-weight: 700;
  color: var(--color-text);
}

.brand-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.brand-chip {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-line);
  border-radius: 11px;
  padding: 13px 6px;
  text-align: center;
  font-size: var(--font-size-micro);
  font-weight: 900;
}

.map-grid {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 10px;
}

.mapbox {
  min-height: 195px;
  border: 1px solid var(--color-line);
  border-radius: 14px;
  position: relative;
  background:
    radial-gradient(
      circle at 28% 30%,
      rgba(0, 191, 170, 0.55) 0 5px,
      transparent 6px
    ),
    radial-gradient(
      circle at 65% 48%,
      rgba(142, 105, 173, 0.5) 0 6px,
      transparent 7px
    ),
    radial-gradient(
      circle at 47% 75%,
      rgba(0, 191, 170, 0.45) 0 5px,
      transparent 6px
    ),
    var(--wash-map);
}

.mapbox__tag {
  position: absolute;
  left: 10px;
  bottom: 10px;
  background: var(--color-surface-raised);
  padding: 6px 8px;
  border-radius: 8px;
  font-size: var(--font-size-micro);
  font-weight: 900;
}

.validator {
  text-align: center;
}

.validator__qr {
  width: 100px;
  height: 100px;
  margin: 18px auto;
  border: 8px solid var(--color-surface-raised);
  box-shadow: 0 0 0 1px var(--color-line-strong);
  background:
    repeating-linear-gradient(45deg, var(--n-900) 0 8px, var(--n-0) 8px 16px),
    repeating-linear-gradient(-45deg, transparent 0 8px, var(--n-900) 8px 16px);
}

.campaign-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.campaign {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-line);
  border-radius: 12px;
  padding: 11px;
}

.campaign small {
  font-size: var(--font-size-micro);
  color: var(--color-text-muted);
  font-weight: 800;
  letter-spacing: 0.4px;
}

.campaign b {
  display: block;
  font-size: 11px;
  margin: 3px 0 6px;
}

.progress {
  height: 5px;
  background: var(--color-line);
  border-radius: var(--border-radius-pill);
  overflow: hidden;
}

.progress i {
  display: block;
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--color-action),
    var(--color-evidence)
  );
}

/* --------------------------------------------------------------------------
   7. Mockups (navegador e smartphone)
   -------------------------------------------------------------------------- */

.mockup {
  background: var(--color-dark-deep);
  border-radius: 32px;
  padding: 14px;
  box-shadow: 0 35px 90px rgba(37, 23, 48, 0.24);
  transform: rotate(1deg);
}

.mockup__screen {
  min-height: 470px;
  border-radius: 23px;
  background: var(--color-surface);
  overflow: hidden;
}

.mockup__top {
  padding: 18px;
  background: var(--color-surface-raised);
  border-bottom: 1px solid var(--color-line);
  display: flex;
  justify-content: space-between;
}

.mockup__dots {
  display: flex;
  gap: 6px;
}

.mockup__dots i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-line-strong);
}

.mockup__body {
  padding: 22px;
}

.mockup__cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.mockup__metric {
  background: var(--color-surface-raised);
  border-radius: 16px;
  padding: 17px;
  border: 1px solid var(--color-line);
}

.mockup__metric b {
  font-size: 23px;
}

.mockup__metric small {
  display: block;
  color: var(--color-text-muted);
  margin-top: 3px;
}

.mockup__chart {
  margin-top: 15px;
  background: var(--color-surface-raised);
  border-radius: var(--border-radius-md);
  padding: 18px;
  height: 180px;
  border: 1px solid var(--color-line);
  display: flex;
  align-items: flex-end;
  gap: 9px;
}

.mockup__chart i {
  flex: 1;
  border-radius: 7px 7px 2px 2px;
  background: linear-gradient(var(--color-evidence), var(--color-action));
  opacity: 0.8;
}

.phone {
  width: 160px;
  margin: auto;
  background: var(--color-dark-deep);
  border-radius: 27px;
  padding: 8px;
}

.phone__screen {
  background: var(--color-surface-raised);
  border-radius: 20px;
  padding: 12px;
  min-height: 260px;
}

.phone__brand {
  font-size: var(--font-size-micro);
  font-weight: 900;
  color: var(--color-action-ink); /* 6.17:1 — era 4.40:1 */
}

.benefit-card {
  height: 65px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--purple-tint), var(--teal-tint));
  margin: 8px 0;
  padding: 10px;
  font-size: var(--font-size-micro);
  line-height: 1.35;
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   8. Vídeo — moldura de smartphone (vertical) e moldura horizontal
   -------------------------------------------------------------------------- */

.video-phone {
  width: min(310px, 100%);
  margin-inline: auto;
  background: var(--color-dark-deep);
  border-radius: 42px;
  padding: 12px;
  box-shadow: var(--shadow-deep);
  position: relative;
}

/* "Notch" decorativo */
.video-phone::before {
  content: "";
  position: absolute;
  top: 22px;
  left: 50%;
  transform: translateX(-50%);
  width: 92px;
  height: 20px;
  border-radius: var(--border-radius-pill);
  background: var(--color-dark-deep);
  z-index: 2;
}

.video-phone video {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  border-radius: 32px;
  background: var(--color-dark-deep);
  color: var(--color-on-dark-muted);
  display: block;
}

.video-frame {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  background: var(--color-dark-deep);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-card);
}

.video-frame video {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--color-dark-deep);
  color: var(--color-on-dark-muted);
  display: block;
}

/* Conteúdo de fallback dentro do <video>: só aparece em navegador sem suporte
   ao elemento, e nesse caso cai sobre o fundo escuro da moldura. Sem isto
   herdaria tinta escura sobre fundo escuro. */
.video-phone video a,
.video-frame video a {
  color: var(--color-on-brand);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.video-caption {
  margin-top: 14px;
  text-align: center;
  font-size: 13px;
  color: var(--color-text);
}

.video-caption strong {
  color: var(--color-ink);
}

/* Aviso exibido no lugar do player quando o arquivo de vídeo não carrega.
   Mantém a proporção da moldura para o layout não "pular". */
.video-missing {
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 6px;
  padding: 24px 18px;
  text-align: center;
  color: var(--color-on-dark-muted);
  font-size: 12px;
  line-height: 1.5;
  background: linear-gradient(
    145deg,
    var(--color-dark-raised),
    var(--color-dark-deep)
  );
}

.video-phone .video-missing {
  aspect-ratio: 9 / 16;
  border-radius: 32px;
}

.video-frame .video-missing {
  aspect-ratio: 16 / 9;
}

.video-missing strong {
  color: var(--color-on-brand);
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   10. Voltar ao topo
   -------------------------------------------------------------------------- */

.back-to-top {
  position: fixed;
  right: max(20px, env(safe-area-inset-right, 0px) + 12px);
  bottom: max(20px, calc(env(safe-area-inset-bottom, 0px) + 12px));
  z-index: var(--z-float);
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: var(--border-radius-pill);
  border: 1px solid var(--color-line-strong);
  background: var(--color-surface-raised);
  color: var(--color-action-ink);
  box-shadow: var(--shadow-card);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition:
    opacity var(--transition-base),
    transform var(--transition-base),
    visibility var(--transition-base),
    background-color var(--transition-fast),
    border-color var(--transition-fast);
}

.back-to-top--visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--color-action);
  background: var(--color-action-wash);
}

/* Com o menu mobile aberto o botão fica fora do caminho — some sem
   depender do JS voltar a escondê-lo. */
body[data-menu-open="true"] .back-to-top {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   11. FAQ
   -------------------------------------------------------------------------- */

.faq {
  display: grid;
  gap: 10px;
}

.faq details {
  border: 1px solid var(--color-line);
  border-radius: 16px;
  background: var(--color-surface-raised);
}

/* O padding vive no <summary>, não no <details>: o alvo clicável passa de
   24px de altura para a linha inteira com 56px. Visualmente idêntico. */
.faq summary {
  cursor: pointer;
  font-weight: 800;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  min-height: 56px;
  border-radius: 16px;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-action-wash);
  color: var(--color-action-ink);
  font-size: 19px;
  font-weight: 700;
  line-height: 1;
  transition: background-color var(--transition-fast);
}

.faq summary:hover::after {
  background: var(--purple-wash-strong);
}

.faq details[open] summary::after {
  content: "–";
}

.faq summary:focus-visible {
  border-radius: 16px;
}

.faq details p {
  color: var(--color-text);
  margin: 0 20px 20px;
}