/* Backlab Signature — "Existe uma solução Backlab para isso." Conclui a narrativa
   institucional/comercial e faz a ponte para a conversão. Fortemente tipográfica: sem
   cards, ícones decorativos, imagem ou sistema visual novo. Depois da Prova Social
   (Backlab Black, silenciosa), o preto aprofunda de novo para Deep Black, marcando o
   encerramento. Reveal único e curto via JS (ver signature.js); o HTML/CSS já é legível
   e funcional sem ele — sem opacity:0 permanente em nenhum estado base. */
.bl-signature {
  position: relative;
  isolation: isolate;
  display: flex;
  align-items: center;
  margin: 0;
  min-block-size: clamp(32rem, 92svh, 54rem);
  background-color: var(--bl-bg-deep, #050707);
  color: var(--bl-text-primary, #f5f8f7);
  overflow: clip;
}

.bl-signature,
.bl-signature *,
.bl-signature *::before,
.bl-signature *::after {
  box-sizing: border-box;
}

.bl-signature::before {
  position: absolute;
  inset: 0;
  content: '';
  background: radial-gradient(60% 55% at 50% 22%, rgba(61, 191, 176, .05), transparent 70%);
  pointer-events: none;
}

.bl-signature__inner {
  position: relative;
  inline-size: 100%;
  padding-block: clamp(5rem, 11svh, 7.5rem);
  text-align: center;
}

/* ---- Eyebrow / preparatório ------------------------------------------------------------- */
.bl-signature__eyebrow {
  margin: 0 0 clamp(0.75rem, 2svh, 1.25rem);
  color: var(--bl-text-secondary, #a8b4b1);
  font: 600 clamp(.67rem, .64rem + .12vw, .78rem)/1.3 var(--bl-font-ui, system-ui, sans-serif);
  letter-spacing: .14em;
  text-transform: uppercase;
}

.bl-signature__prelude {
  margin: 0 0 clamp(1rem, 2.5svh, 1.75rem);
}

.bl-signature__prelude-line {
  margin: 0;
  color: var(--bl-text-secondary, #a8b4b1);
  font: 500 clamp(1.05rem, .95rem + .5vw, 1.5rem)/1.3 var(--bl-font-ui, system-ui, sans-serif);
}

/* ---- Headline: a experiência da seção -------------------------------------------------- */
.bl-signature__headline {
  max-inline-size: 19ch;
  margin: 0 auto;
  color: var(--bl-text-primary, #f5f8f7);
  font-family: var(--bl-font-display, sans-serif);
  font-size: clamp(2.5rem, 1rem + 3.5vw, 5.5rem);
  font-weight: 600;
  letter-spacing: -.045em;
  line-height: .98;
  text-wrap: balance;
}

.bl-signature__brand {
  color: var(--bl-color-brand, #3dbfb0);
}

/* ---- Máscaras de reveal: estado base sempre visível, JS aplica o "from" ---------------- */
.bl-signature__mask {
  display: block;
  overflow: hidden;
}

.bl-signature__line {
  display: block;
}

/* ---- Texto complementar ------------------------------------------------------------------ */
.bl-signature__complement {
  max-inline-size: 58ch;
  margin: clamp(1.25rem, 2.5svh, 1.75rem) auto 0;
  color: var(--bl-text-secondary, #a8b4b1);
  font: 400 clamp(1rem, .96rem + .2vw, 1.15rem)/1.6 var(--bl-font-ui, system-ui, sans-serif);
  text-wrap: pretty;
}

/* ---- CTAs ---------------------------------------------------------------------------------- */
.bl-signature__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(1rem, 2vw, 1.5rem);
  margin-block-start: clamp(1.75rem, 4svh, 2.5rem);
}

.bl-signature .bl-signature__cta {
  text-decoration: none;
}

.bl-signature .bl-signature__cta--primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  min-block-size: 3.25rem;
  padding: .82rem 1.5rem;
  border: 1px solid transparent;
  border-radius: var(--bl-radius-sm, .375rem);
  color: var(--bl-bg-deep, #050707);
  background: var(--bl-color-brand, #3dbfb0);
  font: 600 .95rem/1.25 var(--bl-font-ui, system-ui, sans-serif);
  transition: transform 200ms, box-shadow 200ms;
}

.bl-signature__cta--primary svg {
  flex: 0 0 auto;
  transition: transform 200ms;
}

.bl-signature .bl-signature__cta--primary:focus-visible {
  outline: 2px solid var(--bl-color-brand, #3dbfb0);
  outline-offset: 4px;
}

.bl-signature .bl-signature__cta--secondary {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  min-block-size: 2.75rem;
  padding: .25rem 0;
  color: var(--bl-text-secondary, #a8b4b1);
  font: 600 .92rem/1.2 var(--bl-font-ui, system-ui, sans-serif);
}

.bl-signature__cta--secondary > span:first-child {
  position: relative;
}

.bl-signature__cta--secondary > span:first-child::after {
  position: absolute;
  inset-inline: 0;
  inset-block-end: -.2rem;
  block-size: 1px;
  content: '';
  background: rgba(61, 191, 176, .5);
  transform: scaleX(.42);
  transform-origin: 0 50%;
  transition: transform 200ms var(--bl-ease-out, ease-out), background-color 200ms;
}

.bl-signature__cta--secondary svg {
  flex: 0 0 auto;
  transition: transform 200ms var(--bl-ease-out, ease-out);
}

.bl-signature .bl-signature__cta--secondary:focus-visible {
  outline: 2px solid var(--bl-color-brand, #3dbfb0);
  outline-offset: 4px;
  border-radius: 2px;
}

@media (hover: hover) and (pointer: fine) {
  .bl-signature .bl-signature__cta--primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 28px -16px rgba(61, 191, 176, .55);
  }

  .bl-signature .bl-signature__cta--primary:hover svg {
    transform: translateX(3px);
  }

  .bl-signature .bl-signature__cta--secondary:hover {
    color: var(--bl-text-primary, #f5f8f7);
  }

  .bl-signature__cta--secondary:hover > span:first-child::after {
    background: var(--bl-color-brand, #3dbfb0);
    transform: scaleX(1);
  }

  .bl-signature__cta--secondary:hover svg {
    transform: translateX(3px);
  }
}

/* ---- Tablet ---------------------------------------------------------------------------------- */
@media (min-width: 768px) {
  .bl-signature__headline {
    max-inline-size: 19ch;
  }
}

/* ---- Desktop --------------------------------------------------------------------------------- */
@media (min-width: 1024px) {
  .bl-signature__headline {
    max-inline-size: 19ch;
  }
}

@media (min-width: 1440px) {
  .bl-signature__headline {
    max-inline-size: 19ch;
  }
}

/* ---- Mobile ---------------------------------------------------------------------------------- */
@media (max-width: 767px) {
  /* HOME-SPEC.md especifica 80-100svh apenas no desktop; mobile sempre usa altura natural,
     não só em telas baixas — sem isso a seção abre um vazio de ~400-500px em qualquer
     aparelho com mais de 700px de altura (a maioria dos smartphones atuais). */
  .bl-signature {
    min-block-size: auto;
  }

  .bl-signature__inner {
    padding-block: clamp(4.5rem, 20vw, 6.5rem);
  }

  .bl-signature__headline {
    max-inline-size: 18ch;
    font-size: clamp(2.3rem, 10vw, 3.2rem);
    line-height: 1.05;
  }

  .bl-signature__prelude-line {
    font-size: clamp(1rem, 4.6vw, 1.2rem);
  }

  .bl-signature__complement {
    max-inline-size: 32ch;
  }

  .bl-signature__actions {
    flex-direction: column;
    align-items: stretch;
    inline-size: min(100%, 24rem);
    margin-inline: auto;
  }

  .bl-signature .bl-signature__cta--primary {
    inline-size: 100%;
  }

  .bl-signature .bl-signature__cta--secondary {
    justify-content: center;
  }
}

/* ---- Altura baixa: não forçar min-height cheia se piorar a composição ------------------- */
@media (max-width: 767px) and (max-height: 700px) {
  .bl-signature {
    min-block-size: auto;
  }

  .bl-signature__inner {
    padding-block: clamp(3.5rem, 16vh, 5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .bl-signature .bl-signature__cta--primary,
  .bl-signature__cta--primary svg,
  .bl-signature .bl-signature__cta--secondary,
  .bl-signature__cta--secondary > span:first-child::after,
  .bl-signature__cta--secondary svg {
    transition-duration: .01ms;
  }
}

@media (forced-colors: active) {
  .bl-signature .bl-signature__cta--primary {
    border-color: ButtonText;
    color: ButtonText;
    background: ButtonFace;
  }

  .bl-signature__brand {
    color: LinkText;
  }

  .bl-signature__cta--secondary > span:first-child::after {
    background: CanvasText;
  }
}