/* ==========================================================================
   02 — LAYOUT
   Estruturas que se repetem em toda a página: container, seções,
   cabeçalho, navegação e rodapé.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Container e seções
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.section {
  position: relative;
  padding-block: var(--section-padding);
}

/* Duas seções seguidas do mesmo tom não devem dobrar o respiro entre elas */
.section--flush-top { padding-top: 0; }

/* Painel translúcido no miolo da página.
   Separa visualmente o bloco sem tapar o fundo animado: o desfoque atrás
   acalma as faixas de luz o suficiente para o texto continuar legível. */
.section--panel {
  --surface: rgba(255, 255, 255, .05);
  background: rgba(8, 12, 22, .62);
  -webkit-backdrop-filter: blur(20px) saturate(130%);
          backdrop-filter: blur(20px) saturate(130%);
}

.section--panel:not(.section--flush-top) { border-top: 1px solid rgba(255, 255, 255, .07); }
.section--panel:last-of-type { border-bottom: 1px solid rgba(255, 255, 255, .07); }

.section__head {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: clamp(38px, 5vw, 64px);
}

.section__intro {
  max-width: 52ch;
  color: var(--fg-dim);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
}

/* --------------------------------------------------------------------------
   Barra de progresso da leitura
   -------------------------------------------------------------------------- */
.scroll-progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 90;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-blue), var(--color-blue-glow));
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
}

/* --------------------------------------------------------------------------
   Cabeçalho
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 80;
}

.site-header::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: transparent;
  transition: background .35s;
}

/* Ganha fundo assim que a página sai do topo */
.site-header.is-stuck {
  background: rgba(10, 14, 20, .78);
  backdrop-filter: blur(14px) saturate(140%);
}

.site-header.is-stuck::after { background: rgba(255, 255, 255, .09); }

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 70px;
}

/* --------------------------------------------------------------------------
   Navegação principal
   -------------------------------------------------------------------------- */
.main-nav__list {
  display: flex;
  align-items: center;
  gap: 30px;
}

.main-nav__link {
  position: relative;
  padding-block: 4px;
  color: #B9C5D4;
  font-size: .95rem;
  text-decoration: none;
  transition: color .25s;
}

.main-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--color-blue-lit);
  transform: scaleX(0);
  transform-origin: 100% 50%;
  transition: transform .32s var(--ease);
}

.main-nav__link:hover { color: #fff; }

.main-nav__link:hover::after {
  transform: scaleX(1);
  transform-origin: 0 50%;
}

/* --------------------------------------------------------------------------
   Botão do menu em telas pequenas
   -------------------------------------------------------------------------- */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, .04);
  cursor: pointer;
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 17px;
  height: 1.5px;
  background: #fff;
  transition: background .2s;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 17px;
  height: 1.5px;
  background: #fff;
  transition: transform .3s var(--ease);
}

.nav-toggle__bars::before { top: -5.5px; }
.nav-toggle__bars::after { top: 5.5px; }

/* Vira um "X" com o menu aberto */
.site-header.is-open .nav-toggle__bars { background: transparent; }
.site-header.is-open .nav-toggle__bars::before { transform: translateY(5.5px) rotate(45deg); }
.site-header.is-open .nav-toggle__bars::after { transform: translateY(-5.5px) rotate(-45deg); }

/* --------------------------------------------------------------------------
   Gaveta de navegação (celular)
   A altura é calculada pelo JavaScript para a transição ser suave.
   -------------------------------------------------------------------------- */
.mobile-nav { display: none; }

@media (max-width: 860px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }

  .mobile-nav {
    display: block;
    height: 0;
    overflow: hidden;
    background: rgba(10, 14, 20, .95);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0);
    transition: height .42s var(--ease);
  }

  .site-header.is-open .mobile-nav { border-bottom-color: rgba(255, 255, 255, .09); }

  .mobile-nav__list {
    display: flex;
    flex-direction: column;
    padding: 6px var(--container-padding) 26px;
  }

  .mobile-nav__link {
    display: block;
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, .07);
    font-family: var(--font-display);
    font-size: 1.32rem;
    text-decoration: none;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity .4s, transform .4s;
  }

  .site-header.is-open .mobile-nav__link {
    opacity: 1;
    transform: none;
  }

  .mobile-nav__cta {
    margin-top: 22px;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity .4s, transform .4s;
  }

  .site-header.is-open .mobile-nav__cta {
    opacity: 1;
    transform: none;
  }
}

/* --------------------------------------------------------------------------
   Rodapé
   -------------------------------------------------------------------------- */
.site-footer {
  padding-block: 40px 46px;
  border-top: 1px solid var(--line);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.footer-nav__list {
  display: flex;
  gap: 22px;
}

.footer-nav__link {
  color: #93A3B6;
  font-size: .9rem;
  text-decoration: none;
  transition: color .25s;
}

.footer-nav__link:hover { color: #fff; }

.site-footer__legal {
  color: #6E7D90;
  font-size: var(--size-small);
}