/* =====================================================================
   layout.css — Estruturas de layout reutilizáveis
   Container, grelhas, secções, cabeçalho (escuro) e rodapé (escuro).
   Comportamento responsivo principal em responsive.css.
   ===================================================================== */

/* ---- Container ---- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}
.container--narrow { max-width: 820px; }
.container--wide { max-width: 1360px; }

/* ---- Secções ---- */
.section { padding-block: var(--space-xl); }
.section--tight { padding-block: var(--space-lg); }
.section--surface { background: var(--color-surface); }
.section--dark { background: var(--color-dark); color: var(--color-on-dark); }
.section--dark :is(h1,h2,h3,h4) { color: #fff; }
.section--dark p { color: var(--color-on-dark-muted); }

.section-header { max-width: 720px; margin-bottom: var(--space-lg); }
.section-header--center { margin-inline: auto; text-align: center; }
.section-header .eyebrow {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--fs-100);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}
.section-header p {
  margin-top: var(--space-sm);
  color: var(--color-muted);
  font-size: var(--fs-400);
}
.section--dark .section-header p { color: var(--color-on-dark-muted); }

/* ---- Grelhas utilitárias ---- */
.grid { display: grid; gap: var(--space-lg); }
.grid--2, .grid--3, .grid--4, .grid--6 { grid-template-columns: 1fr; }
.grid--tight { gap: var(--space-md); }

.flow > * + * { margin-top: var(--space-md); }

/* =====================================================================
   CABEÇALHO (escuro premium)
   ===================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--color-dark-2);
  border-bottom: 1px solid var(--color-dark-border);
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-md); min-height: var(--header-height);
}

.site-brand { display: inline-flex; align-items: center; }
.site-brand__logo { height: 26px; width: auto; }

/* Navegação principal */
.site-nav { display: none; } /* mobile-first; ver responsive.css */
.site-nav__list { display: flex; align-items: center; gap: 2px; }
.site-nav__link {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  color: var(--color-on-dark);
  font-weight: var(--fw-medium);
  font-size: var(--fs-200);
  white-space: nowrap;
}
.site-nav__link:hover { color: #fff; background: rgba(255,255,255,0.06); }
.site-nav__link[aria-current="page"] { color: var(--color-primary); font-weight: var(--fw-semibold); }
.site-nav__link[aria-current="page"]::after {
  content: ""; display: block; height: 2px; border-radius: 2px;
  margin: 5px var(--space-2xs) -7px;
  background: var(--color-primary);
}

.site-header__actions { display: flex; align-items: center; gap: var(--space-sm); }

/* Hamburger */
.nav-toggle {
  display: inline-grid; place-items: center;
  width: 44px; height: 44px;
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-sm);
  background: transparent;
}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: ""; display: block; width: 20px; height: 2px;
  background: #fff; border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle__bars::before { transform: translateY(-6px); }
.nav-toggle__bars::after { transform: translateY(4px); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(0) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-2px) rotate(-45deg); }

/* Painel mobile */
.mobile-nav { display: none; background: var(--color-dark-2); border-top: 1px solid var(--color-dark-border); }
.mobile-nav.is-open { display: block; }
.mobile-nav__list { padding: var(--space-sm) 0; }
.mobile-nav__link {
  display: block; padding: var(--space-sm) var(--container-pad);
  color: var(--color-on-dark); font-weight: var(--fw-medium);
}
.mobile-nav__link:hover { background: rgba(255,255,255,0.05); color: #fff; }
.mobile-nav__link[aria-current="page"] { color: var(--color-primary); }
.mobile-nav__cta { padding: var(--space-sm) var(--container-pad) var(--space-md); }

/* =====================================================================
   RODAPÉ (escuro premium)
   ===================================================================== */
.site-footer {
  background: var(--color-dark-2);
  color: var(--color-on-dark-muted);
  padding-block: var(--space-xl) var(--space-lg);
}
.site-footer a { color: #cdd2da; }
.site-footer a:hover { color: #fff; }

.site-footer__top {
  display: grid; gap: var(--space-lg); grid-template-columns: 1fr;
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-dark-border);
}
.site-footer__brand .site-brand__logo { height: 26px; }
.site-footer__brand p { margin-top: var(--space-md); color: var(--color-on-dark-muted); max-width: 34ch; }
.footer-social { display: flex; gap: var(--space-xs); margin-top: var(--space-md); }
.footer-social a {
  display: grid; place-items: center; width: 38px; height: 38px;
  border: 1px solid var(--color-dark-border); border-radius: var(--radius-sm);
  color: #cdd2da;
}
.footer-social a:hover { border-color: var(--color-primary); color: var(--color-primary); }

.footer-col h4 {
  color: #fff; font-size: var(--fs-100);
  text-transform: uppercase; letter-spacing: 0.08em;
  margin-bottom: var(--space-md);
}
.footer-col li { margin-bottom: var(--space-xs); font-size: var(--fs-200); }
.footer-col a[aria-current="page"] { color: var(--color-primary); }
.footer-contact li { display: flex; gap: var(--space-xs); align-items: flex-start; }

/* Newsletter */
.footer-newsletter p { font-size: var(--fs-200); margin-bottom: var(--space-sm); }
.newsletter-form { display: flex; gap: var(--space-xs); }
.newsletter-form input {
  flex: 1; min-width: 0;
  padding: 0.65em 0.85em;
  background: var(--color-dark-soft);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-sm);
  color: #fff;
}
.newsletter-form input::placeholder { color: #7e8794; }
.newsletter-form input:focus { outline: none; border-color: var(--color-primary); }
.newsletter-form button {
  flex: none; width: 46px; border: 0;
  border-radius: var(--radius-sm);
  background: var(--color-primary); color: #fff;
  display: grid; place-items: center;
}
.newsletter-form button:hover { background: var(--color-primary-dark); }

.site-footer__bottom {
  display: flex; flex-wrap: wrap; gap: var(--space-sm) var(--space-lg);
  justify-content: space-between; align-items: center;
  padding-top: var(--space-lg);
  color: #7e8794; font-size: var(--fs-100);
}
.site-footer__bottom ul { display: flex; gap: var(--space-md); flex-wrap: wrap; }