/* ============================================================
   ESTUDIO MARTINI — Layout
   Header · Mobile Nav · Footer
   ============================================================ */

/* ─── Site Header ────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  padding-block: var(--space-6);
  transition:
    padding    var(--dur-base) var(--ease-out),
    background var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out),
    color      var(--dur-base) var(--ease-out);
}

.site-header.scrolled {
  padding-block: var(--space-4);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--color-gray-200);
  color: var(--color-dark);
}

/* Over hero: white text + dark backing for legibility */
.site-header.hero-mode {
  color: var(--color-white);
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.site-header.hero-mode .site-logo__sub {
  color: rgba(255, 255, 255, 0.55);
}

.site-header.scrolled .site-logo__sub {
  color: var(--color-gray-400);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* ─── Logo ───────────────────────────────────────────────── */
.site-logo {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  line-height: 1;
}

.site-logo__line {
  display: block;
  width: 100%;
  height: 1px;
  background-color: currentColor;
  opacity: 0.4;
}

.site-logo__name {
  font-family: var(--font-serif);
  font-size: var(--text-md);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
  color: currentColor;
}

.site-logo__sub {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-gray-400);
  transition: color var(--dur-base) var(--ease-out);
}

/* ─── Desktop Nav ────────────────────────────────────────── */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-10);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: currentColor;
  position: relative;
  padding-block: var(--space-1);
  transition: opacity var(--dur-fast) var(--ease-out);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: currentColor;
  transition: width var(--dur-slow) var(--ease-out);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Nav CTA */
.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: var(--space-3) var(--space-6);
  border: 1px solid currentColor;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: currentColor;
  white-space: nowrap;
  transition: all var(--dur-base) var(--ease-out);
}

.site-header.hero-mode .nav-cta:hover {
  background: var(--color-white);
  color: var(--color-dark);
  border-color: var(--color-white);
}

.site-header.scrolled .nav-cta:hover {
  background: var(--color-dark);
  color: var(--color-white);
  border-color: var(--color-dark);
}

/* ─── Hamburger ──────────────────────────────────────────── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 36px;
  height: 36px;
  padding: 6px;
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 1px;
  background-color: currentColor;
  transform-origin: center;
  transition:
    transform var(--dur-base) var(--ease-out),
    opacity   var(--dur-base) var(--ease-out);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ─── Mobile Nav ─────────────────────────────────────────── */
.nav-mobile {
  display: none;
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-nav) - 1);
  background: var(--color-white);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-10);
  padding: var(--space-8);
}

.nav-mobile.open {
  display: flex;
}

.nav-mobile .nav-list {
  flex-direction: column;
  gap: var(--space-6);
  text-align: center;
}

.nav-mobile .nav-link {
  font-family: var(--font-serif);
  font-size: clamp(var(--text-xl), 5vw, var(--text-3xl));
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--color-dark);
}

.nav-mobile .nav-link::after {
  bottom: -4px;
}

/* ─── Footer ─────────────────────────────────────────────── */
.site-footer {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding-block: var(--space-20) var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: var(--space-8);
}

/* Logo in dark context */
.footer-brand .site-logo__name  { color: var(--color-white); }
.footer-brand .site-logo__sub   { color: rgba(255,255,255,0.35); }
.footer-brand .site-logo__line  { background: rgba(255,255,255,0.2); }

.footer-tagline {
  margin-top: var(--space-5);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.45);
  line-height: 1.75;
  max-width: 30ch;
}

.footer-heading {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  margin-bottom: var(--space-5);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-link {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.65);
  transition: color var(--dur-fast) var(--ease-out);
}
.footer-link:hover { color: var(--color-white); }

.footer-contact-item {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.65);
  line-height: 1.7;
}

.footer-social {
  display: flex;
  gap: var(--space-5);
  margin-top: var(--space-6);
}

.footer-social-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  transition: color var(--dur-fast) var(--ease-out);
}
.footer-social-link:hover { color: var(--color-white); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.footer-copy {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.25);
}

.footer-credit {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.25);
}

.footer-credit a {
  color: rgba(255,255,255,0.45);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}

.footer-credit a:hover {
  color: var(--color-white);
}

.footer-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: 1px solid rgba(255,255,255,0.2);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  transition: all var(--dur-base) var(--ease-out);
}
.footer-whatsapp:hover {
  border-color: var(--color-white);
  color: var(--color-white);
}

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-list  { display: none; }
  .nav-cta   { display: none; }
  .nav-toggle { display: flex; }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}