/* ==========================================================================
   NIVRAIT — layout: contenedor, header, footer, ritmo de secciones
   ========================================================================== */

.wrap {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--s-5);
}

.section { padding: clamp(48px, 5.5vw, 80px) 0; }

.section-dark {
  background: var(--bg-dark);
  color: var(--ink-dark);
}
.section-dark h2,
.section-dark h3 { color: var(--ink-dark); }
.section-dark .tag,
.section-dark .eyebrow { color: var(--muted-dark); }
.section-dark .lead { color: #CFCBC4; }

.section-surface { background: var(--surface); }

.section-head { max-width: 68ch; margin-bottom: clamp(24px, 3vw, 40px); }
.section-head h2 + .lead { margin-top: var(--s-4); }

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  /* Fondo sólido a propósito: backdrop-filter convierte al header en bloque
     contenedor de los descendientes fixed y rompe el panel de menú móvil. */
  background: var(--bg);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-base) var(--ease);
}
.site-header.is-stuck { border-bottom-color: var(--line); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
  height: var(--header-h);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 28px;
  height: 28px;
  color: currentColor;
  flex-shrink: 0;
}
.logo-word {
  font-family: var(--font-sans);
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 1.15rem;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.4vw, 34px);
}
.main-nav a {
  position: relative;
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 4px 0;
  color: var(--ink-soft);
  transition: color var(--t-fast) var(--ease);
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-base) var(--ease);
}
.main-nav a:hover { color: var(--ink); }
.main-nav a:hover::after,
.main-nav a[aria-current="true"]::after { transform: scaleX(1); }
.main-nav a[aria-current="true"] { color: var(--ink); }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin-right: -10px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--ink);
}
.menu-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--t-base) var(--ease), opacity var(--t-fast) var(--ease);
}
.menu-toggle.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.menu-toggle.is-open span:nth-child(2) { opacity: 0; }
.menu-toggle.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  background: var(--bg-dark);
  color: #B9B5AE;
  padding-top: clamp(48px, 6vw, 72px);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-7);
  padding-bottom: var(--s-7);
  border-bottom: 1px solid var(--line-dark);
}

.footer-brand .logo { color: var(--white); margin-bottom: var(--s-3); }
.footer-brand p {
  color: var(--muted-dark);
  font-size: 0.92rem;
  max-width: 34ch;
}

.footer-col h3 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted-dark);
  margin-bottom: var(--s-4);
}
.footer-col ul {
  display: grid;
  gap: 10px;
  font-size: 0.92rem;
}
.footer-col a {
  color: #B9B5AE;
  transition: color var(--t-fast) var(--ease);
}
.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2) var(--s-5);
  justify-content: space-between;
  align-items: center;
  padding-top: var(--s-5);
  padding-bottom: var(--s-5);
  font-size: 0.78rem;
  color: #8A857E;
}
.footer-code { font-family: var(--font-mono); }

/* --------------------------------------------------------------------------
   Breakpoints
   -------------------------------------------------------------------------- */

@media (min-width: 720px) {
  .footer-inner { grid-template-columns: 1.4fr 1fr 1fr; }
}

@media (min-width: 1024px) {
  .footer-inner { grid-template-columns: 1.6fr 1fr 1fr 1.1fr; }
}

@media (max-width: 899px) {
  .menu-toggle { display: flex; }
  /* Especificidad por encima de .btn (components.css se carga después) */
  .header-actions .header-cta { display: none; }

  .main-nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: var(--bg);
    padding: var(--s-7) var(--s-5);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--t-base) var(--ease), transform var(--t-base) var(--ease), visibility var(--t-base);
    z-index: 99;
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  .main-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .main-nav li { border-bottom: 1px solid var(--line); }
  .main-nav ul a {
    display: block;
    font-family: var(--font-serif);
    font-size: 1.6rem;
    color: var(--ink);
    padding: var(--s-4) 0;
  }
  .main-nav ul a::after { display: none; }
  .nav-cta { margin-top: var(--s-6); }
  .nav-cta .btn { width: 100%; text-align: center; }
}

@media (min-width: 900px) {
  .nav-cta { display: none; }
}