.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  background: rgba(255, 255, 255, .46);
  border-bottom: 1px solid rgba(217, 226, 232, .34);
  color: var(--ink);
  backdrop-filter: blur(16px) saturate(135%);
  -webkit-backdrop-filter: blur(16px) saturate(135%);
  transition: background .35s ease, border-color .35s ease, box-shadow .35s ease, color .35s ease;
  transition-delay: .2s;
}

main > [id] { scroll-margin-top: 86px; }
.hero { min-height: 100vh; }

.site-header.is-scrolled {
  background: rgba(255, 255, 255, .72);
  box-shadow: 0 8px 24px rgba(6, 23, 37, .08);
}

.site-header[data-theme="dark"] {
  background: rgba(6, 23, 37, .28);
  border-bottom-color: rgba(255, 255, 255, .1);
  color: var(--white);
}

.site-header[data-theme="dark"].is-scrolled {
  background: rgba(6, 23, 37, .58);
  box-shadow: 0 8px 28px rgba(0, 0, 0, .16);
}

.header-logo-stack {
  position: relative;
  display: block;
  width: 250px;
  height: 56px;
}

.header-logo-stack .header-logo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: left center;
  transition: opacity .32s ease;
  transition-delay: .2s;
}

.header-logo--dark { opacity: 0; }
.site-header[data-theme="dark"] .header-logo--light { opacity: 0; }
.site-header[data-theme="dark"] .header-logo--dark { opacity: 1; }

.site-header nav,
.site-header nav a,
.site-header .menu-toggle span {
  transition: color .35s ease, border-color .35s ease, background .35s ease;
  transition-delay: .2s;
}

.site-header[data-theme="dark"] .nav-cta { border-color: rgba(255, 255, 255, .72); }
.site-header[data-theme="dark"] .nav-cta:hover { background: var(--white); color: var(--navy); }
.site-header[data-theme="dark"] nav a:not(.nav-cta):after { background: var(--cyan); }
.site-header[data-theme="dark"] .menu-toggle span { background: var(--white); }

.contact-method {
  display: flex;
  align-items: flex-start;
  gap: 13px;
}

.contact-method .contact-icon {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  padding: 8px;
  color: #6fcfff;
  background: rgba(54, 194, 255, .1);
  border: 1px solid rgba(111, 207, 255, .32);
  border-radius: 50%;
}

.contact-method > span {
  display: block;
  color: inherit;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.5;
  text-transform: none;
}

.contact-method > span small {
  display: block;
  margin-bottom: 3px;
  color: #6fcfff;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.contact-method:hover > span {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.contact-method:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 5px;
}

.whatsapp-contact {
  align-items: flex-start;
}

.whatsapp-contact .whatsapp-icon {
  padding: 0;
  border: 0;
  background: transparent;
}

@media (prefers-reduced-motion: reduce) {
  .site-header,
  .header-logo-stack .header-logo,
  .site-header nav,
  .site-header nav a,
  .site-header .menu-toggle span { transition: none; }
}

@media (max-width: 900px) {
  .site-header nav { background: rgba(255, 255, 255, .96); color: var(--ink); }
  .site-header[data-theme="dark"] nav { background: rgba(6, 23, 37, .96); color: var(--white); }
}

@media (max-width: 620px) {
  .header-logo-stack { width: 210px; height: 48px; }
  main > [id] { scroll-margin-top: 72px; }
}