/* ============================================================
   CUESTA SOLAR — Layout: nav, container, footer, grid
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: clamp(80px, 11vw, 180px);
  z-index: var(--z-base);
}
.section--tight { padding-block: clamp(56px, 8vw, 120px); }

/* divisor luminoso entre cenas */
.section + .section::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: min(880px, 80%);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-line-strong), transparent);
}

/* ---------- Header / Nav ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
  padding: var(--s-4) var(--gutter);
  transition: padding var(--d-base) var(--e-out),
              background var(--d-base) var(--e-out),
              border-color var(--d-base) var(--e-out);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  padding-block: var(--s-3);
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(var(--glass-blur)) saturate(140%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(140%);
  border-bottom: 1px solid var(--c-line);
  box-shadow: 0 8px 30px -18px rgba(40,30,10,.25);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  flex-shrink: 0;
}
.nav__logo { height: 38px; width: auto; }
.nav__brand-text {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: var(--fs-sm);
  letter-spacing: .12em;
  color: var(--t-hi);
  text-transform: uppercase;
}
.nav__brand-text small {
  display: block;
  font-size: .56rem;
  letter-spacing: .3em;
  color: var(--gold);
  font-weight: 600;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 1.6vw, 30px);
}
.nav__link {
  position: relative;
  font-size: var(--fs-sm);
  color: var(--t-mid);
  letter-spacing: .01em;
  padding-block: var(--s-1);
  transition: color var(--d-fast) var(--e-out);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 1px;
  background: var(--grad-fusion);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--d-base) var(--e-out);
}
.nav__link:hover { color: var(--t-hi); }
.nav__link:hover::after,
.nav__link.is-active::after { transform: scaleX(1); }
.nav__link.is-active { color: var(--t-hi); }

/* ---- Legibilidade sobre banners escuros (páginas internas com .hero-banner) ---- */
/* No topo (antes do scroll), o banner é escuro: texto branco + leve scrim. Ao rolar, volta ao padrão. */
body:has(.hero-banner) .nav:not(.is-scrolled)::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(8,12,18,.5), rgba(8,12,18,0));
}
body:has(.hero-banner) .nav:not(.is-scrolled) .nav__brand-text { color: #fff; }
body:has(.hero-banner) .nav:not(.is-scrolled) .nav__link { color: rgba(255,255,255,.88); }
body:has(.hero-banner) .nav:not(.is-scrolled) .nav__link:hover,
body:has(.hero-banner) .nav:not(.is-scrolled) .nav__link.is-active { color: #fff; }
body:has(.hero-banner) .nav:not(.is-scrolled) .nav__burger span,
body:has(.hero-banner) .nav:not(.is-scrolled) .nav__burger span::before,
body:has(.hero-banner) .nav:not(.is-scrolled) .nav__burger span::after { background: #fff; }

.nav__cta { flex-shrink: 0; }

.nav__burger {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-line);
}
.nav__burger span {
  position: relative;
  width: 20px; height: 1.5px;
  background: var(--t-hi);
  transition: background .2s;
}
.nav__burger span::before,
.nav__burger span::after {
  content: ""; position: absolute; left: 0;
  width: 20px; height: 1.5px; background: var(--t-hi);
  transition: transform var(--d-fast) var(--e-out);
}
.nav__burger span::before { top: -6px; }
.nav__burger span::after  { top: 6px; }
.nav.is-open .nav__burger span { background: transparent; }
.nav.is-open .nav__burger span::before { transform: translateY(6px) rotate(45deg); }
.nav.is-open .nav__burger span::after  { transform: translateY(-6px) rotate(-45deg); }

/* menu mobile */
.nav__drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--s-3);
  padding: clamp(56px, 10vw, 80px) var(--gutter) var(--gutter);
  background: rgba(248,245,239,.96);
  backdrop-filter: blur(26px);
  -webkit-backdrop-filter: blur(26px);
  overflow-y: auto;
  opacity: 0; visibility: hidden;
  transition: opacity var(--d-base) var(--e-out), visibility var(--d-base);
}
.nav__drawer.is-open { opacity: 1; visibility: visible; }
.nav__drawer a {
  font-family: var(--f-display);
  font-size: clamp(1.35rem, 5.5vw, 2.2rem);
  font-weight: 600;
  color: var(--t-hi);
  letter-spacing: var(--ls-head);
  opacity: 0; transform: translateY(18px);
  transition: opacity var(--d-base) var(--e-out), transform var(--d-base) var(--e-out);
}
.nav__drawer.is-open a { opacity: 1; transform: none; }
.nav__drawer.is-open a:nth-child(1) { transition-delay: .06s; }
.nav__drawer.is-open a:nth-child(2) { transition-delay: .10s; }
.nav__drawer.is-open a:nth-child(3) { transition-delay: .14s; }
.nav__drawer.is-open a:nth-child(4) { transition-delay: .18s; }
.nav__drawer.is-open a:nth-child(5) { transition-delay: .22s; }
.nav__drawer.is-open a:nth-child(6) { transition-delay: .26s; }
.nav__drawer.is-open a:nth-child(7) { transition-delay: .30s; }

/* botão fechar drawer */
.nav__drawer-close {
  position: absolute;
  top: var(--s-5);
  right: var(--gutter);
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid var(--c-line-strong);
  background: var(--c-surface);
  color: var(--t-hi);
  font-size: 1.4rem;
  line-height: 1;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: background var(--d-fast), box-shadow var(--d-fast);
  z-index: 1;
}
.nav__drawer-close:hover { background: var(--c-bg-2); box-shadow: var(--shadow-md); }

/* ---------- Footer ---------- */
.footer {
  position: relative;
  z-index: var(--z-base);
  border-top: 1px solid var(--c-line);
  padding-block: var(--s-9) var(--s-6);
  background: linear-gradient(180deg, transparent, rgba(255,193,7,.02));
}
.footer__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--s-7);
  margin-bottom: var(--s-8);
}
.footer__brand-text {
  font-family: var(--f-display);
  font-weight: 700; font-size: var(--fs-lg);
  color: var(--t-hi); letter-spacing: .04em;
  margin-bottom: var(--s-3);
}
.footer__tagline { max-width: 38ch; color: var(--t-low); font-size: var(--fs-sm); }
.footer__col h4 {
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--s-4);
}
.footer__col a {
  display: block;
  color: var(--t-mid);
  font-size: var(--fs-sm);
  padding-block: var(--s-1);
  transition: color var(--d-fast);
}
.footer__col a:hover { color: var(--t-hi); }
.footer__bottom {
  display: flex; flex-wrap: wrap;
  justify-content: space-between; gap: var(--s-4);
  padding-top: var(--s-6);
  border-top: 1px solid var(--c-line);
  font-size: var(--fs-xs);
  color: var(--t-faint);
}

/* ---------- Grids reutilizáveis ---------- */
.grid { display: grid; gap: var(--s-5); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .nav .nav__links, .nav .nav__cta { display: none; }
  .nav__burger { display: flex; }
  .footer__top { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .footer__top { grid-template-columns: 1fr; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}