/* =============================================================================
   Layout — contêiner, cabeçalho, navegação, seções e rodapé.
   Mobile-first: base = celular; amplia com min-width 576 / 768 / 992 / 1200.
   ============================================================================= */

.container {
  width: min(var(--fa-container), 100% - 2 * var(--fa-page-gutter));
  margin-inline: auto;
}

.container--narrow {
  width: min(var(--fa-container-narrow), 100% - 2 * var(--fa-page-gutter));
}

/* --- Cabeçalho ------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--fa-z-header);
  border-bottom: 1px solid transparent;
  transition: background-color var(--fa-dur-base) var(--fa-ease-standard),
    border-color var(--fa-dur-base) var(--fa-ease-standard), box-shadow var(--fa-dur-base) var(--fa-ease-standard);
}

.site-header.is-scrolled,
.site-header.is-open {
  background: var(--fa-surface-glass);
  border-bottom-color: var(--fa-border);
  box-shadow: var(--fa-shadow-sm);
  backdrop-filter: saturate(1.4) blur(var(--fa-blur));
  -webkit-backdrop-filter: saturate(1.4) blur(var(--fa-blur));
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--fa-space-3);
  min-height: var(--fa-header-h);
}

.site-header__tools {
  display: flex;
  align-items: center;
  gap: var(--fa-space-1);
  margin-left: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--fa-space-2);
  color: var(--fa-text);
  text-decoration: none;
  font-weight: 800;
  font-size: var(--fa-text-lg);
  letter-spacing: -0.02em;
}

.brand__mark {
  width: 2.25rem;
  height: 2.25rem;
  transition: rotate var(--fa-dur-slow) var(--fa-ease-spring);
}

.brand__suffix {
  margin-left: 0.2em;
  color: var(--fa-accent);
}

@media (hover: hover) {
  .brand:hover .brand__mark {
    rotate: -8deg;
  }
}

/* Navegação — celular: painel abaixo do cabeçalho (só com JS ativo) */
.site-nav {
  display: flex;
  flex-direction: column;
  gap: var(--fa-space-4);
  width: 100%;
}

.js .site-nav {
  position: fixed;
  inset: var(--fa-header-h) 0 auto 0;
  max-height: calc(100dvh - var(--fa-header-h));
  overflow-y: auto;
  padding: var(--fa-space-4) var(--fa-page-gutter) var(--fa-space-6);
  background: var(--fa-surface);
  border-bottom: 1px solid var(--fa-border);
  box-shadow: var(--fa-shadow-lg);
  opacity: 0;
  translate: 0 -0.75rem;
  visibility: hidden;
  transition: opacity var(--fa-dur-base) var(--fa-ease-out), translate var(--fa-dur-base) var(--fa-ease-out),
    visibility 0s linear var(--fa-dur-base);
}

.js .site-header.is-open .site-nav {
  opacity: 1;
  translate: 0 0;
  visibility: visible;
  transition-delay: 0s;
}

html:not(.js) .site-header__inner {
  flex-wrap: wrap;
}

html:not(.js) .site-header .menu-toggle {
  display: none;
}

.site-nav__list {
  display: flex;
  flex-direction: column;
}

.site-nav__link {
  display: block;
  padding: var(--fa-space-3) var(--fa-space-2);
  border-bottom: 1px solid var(--fa-border);
  color: var(--fa-text);
  font-weight: 600;
  text-decoration: none;
}

.site-nav__actions {
  display: flex;
  flex-direction: column;
  gap: var(--fa-space-2);
}

.menu-toggle__close,
.is-open .menu-toggle__open {
  display: none;
}

.is-open .menu-toggle__close {
  display: block;
}

@media (min-width: 992px) {
  .site-header__inner {
    gap: var(--fa-space-5);
  }

  .site-nav,
  .js .site-nav {
    position: static;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    flex: 1;
    max-height: none;
    overflow: visible;
    padding: 0;
    background: none;
    border: 0;
    box-shadow: none;
    opacity: 1;
    translate: none;
    visibility: visible;
    transition: none;
  }

  .site-nav__list {
    flex-direction: row;
    gap: var(--fa-space-1);
    margin-inline: auto;
  }

  .site-nav__link {
    position: relative;
    padding: var(--fa-space-2) var(--fa-space-3);
    border: 0;
    border-radius: var(--fa-radius-pill);
    color: var(--fa-text-muted);
    font-size: var(--fa-text-sm);
    transition: color var(--fa-dur-fast) var(--fa-ease-standard), background-color var(--fa-dur-fast) var(--fa-ease-standard);
  }

  .site-nav__link:hover,
  .site-nav__link.is-active {
    color: var(--fa-text);
    background: var(--fa-surface-2);
  }

  .site-nav__link.is-active::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0.15rem;
    width: 0.3rem;
    height: 0.3rem;
    margin-left: -0.15rem;
    border-radius: var(--fa-radius-pill);
    background: var(--fa-brand-gold);
  }

  .site-nav__actions {
    flex-direction: row;
    align-items: center;
  }

  .site-header__tools {
    margin-left: 0;
  }

  .site-header .menu-toggle {
    display: none;
  }
}

/* --- Seções ---------------------------------------------------------------- */

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

.section--tinted {
  background: var(--fa-gradient-surface);
  border-block: 1px solid var(--fa-border);
}

.section--dark {
  --fa-text: var(--fa-dark-text);
  --fa-text-muted: var(--fa-dark-text-muted);
  --fa-primary: var(--fa-dark-primary);
  --fa-border: var(--fa-dark-border);
  --fa-surface: var(--fa-dark-surface);
  --fa-surface-2: var(--fa-dark-bg);
  --fa-gradient-text: var(--fa-dark-gradient-text);
  background: var(--fa-dark-bg);
  color: var(--fa-text);
  overflow: hidden;
  isolation: isolate;
}

.section--dark::before {
  content: '';
  position: absolute;
  inset: -20% -10% auto auto;
  width: min(640px, 90vw);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--fa-brand-blue-rgb), 0.55), transparent 65%);
  z-index: -1;
}

.section__head {
  display: grid;
  gap: var(--fa-space-3);
  max-width: 44rem;
  margin-bottom: var(--fa-space-7);
}

.section__head--center {
  margin-inline: auto;
  text-align: center;
  justify-items: center;
}

.section__title {
  font-size: var(--fa-text-3xl);
}

.section__text {
  color: var(--fa-text-muted);
  font-size: var(--fa-text-lg);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--fa-space-7);
  align-items: center;
}

.split__copy {
  display: grid;
  gap: var(--fa-space-4);
  justify-items: start;
}

@media (min-width: 992px) {
  .split {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: var(--fa-space-8);
  }

  .split--reverse .split__copy {
    order: 2;
  }
}

.page-hero {
  min-height: calc(100dvh - var(--fa-header-h) * 2);
}

/* --- Rodapé ---------------------------------------------------------------- */

.site-footer {
  padding-top: var(--fa-space-7);
  background: var(--fa-brand-navy);
  color: var(--fa-brand-mist);
  font-size: var(--fa-text-sm);
}

.site-footer .brand {
  color: var(--fa-white);
}

.site-footer .brand__suffix {
  color: var(--fa-brand-gold);
}

.site-footer a {
  color: var(--fa-brand-mist);
  text-decoration: none;
  transition: color var(--fa-dur-fast) var(--fa-ease-standard);
}

.site-footer a:hover {
  color: var(--fa-brand-gold);
}

.site-footer__grid {
  display: grid;
  gap: var(--fa-space-6);
  padding-bottom: var(--fa-space-6);
}

.site-footer__about {
  display: grid;
  gap: var(--fa-space-3);
  justify-items: start;
  max-width: 22rem;
}

.site-footer__nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: var(--fa-space-5);
}

.site-footer__nav ul {
  display: grid;
  gap: var(--fa-space-2);
}

.site-footer__title {
  margin-bottom: var(--fa-space-3);
  color: var(--fa-white);
  font-size: var(--fa-text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--fa-space-3);
  padding-block: var(--fa-space-4) calc(var(--fa-space-4) + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--fa-dark-border);
}

.site-footer .icon-btn {
  color: var(--fa-brand-mist);
  border-color: var(--fa-dark-border);
}

@media (min-width: 768px) {
  .site-footer__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}