/* ============================================
   ATACAMA DARK SKY — Shared Components
   Header, footer, nav, buttons, WhatsApp float
   ============================================ */

/* ---- Header ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: background var(--duration-med) var(--ease-out),
              box-shadow var(--duration-med) var(--ease-out);
}

.site-header.transparent {
  background: transparent;
}

.site-header.solid {
  background: rgba(10, 10, 20, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.header-logo img {
  height: 36px;
  width: auto;
}

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

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--duration-med) var(--ease-out);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text-primary);
}

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

/* ---- Header Right ---- */
.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

/* ---- Language Toggle ---- */
.lang-toggle {
  position: relative;
}

.lang-toggle-btn {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.lang-toggle-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-text-primary);
}

.lang-toggle-btn svg {
  width: 14px;
  height: 14px;
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.5rem;
  min-width: 140px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--duration-fast) var(--ease-out);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.lang-toggle.open .lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: all var(--duration-fast);
}

.lang-option:hover {
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
}

.lang-option.active {
  color: var(--color-accent);
}

/* ---- Hamburger ---- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.hamburger .bar {
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: all var(--duration-med) var(--ease-out);
  border-radius: 2px;
}

.hamburger.active .bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .bar:nth-child(2) {
  opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---- Mobile Nav ---- */
.mobile-nav {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 20, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-med) var(--ease-out);
}

.mobile-nav.open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav a {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--color-text-secondary);
  transition: color var(--duration-fast);
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--color-accent);
}

/* ---- Buttons ---- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 2.25rem;
  background: var(--color-accent);
  color: var(--color-bg-deep);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--duration-med) var(--ease-out);
}

.btn-primary:hover {
  background: var(--color-accent-light);
  color: var(--color-bg-deep);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--color-accent-glow);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 2.25rem;
  background: transparent;
  color: var(--color-accent);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid var(--color-accent);
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--duration-med) var(--ease-out);
}

.btn-secondary:hover {
  background: var(--color-accent-glow);
  color: var(--color-accent-light);
  border-color: var(--color-accent-light);
  transform: translateY(-1px);
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-bg-primary);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: var(--space-md);
  max-width: 320px;
}

.footer-brand .footer-logo {
  height: 32px;
  width: auto;
}

.footer-heading {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.footer-links a {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  padding: 0.3rem 0;
  transition: color var(--duration-fast);
}

.footer-links a:hover {
  color: var(--color-accent);
}

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

.footer-social a {
  color: var(--color-text-muted);
  font-size: 1.125rem;
  transition: color var(--duration-fast);
}

.footer-social a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.footer-coordinates {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ---- WhatsApp Float ---- */
.whatsapp-float {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  z-index: 900;
}

.whatsapp-float a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: #25d366;
  border-radius: 50%;
  color: #fff;
  font-size: 1.5rem;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.3);
  transition: all var(--duration-med) var(--ease-out);
}

.whatsapp-float a:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 24px rgba(37, 211, 102, 0.4);
  color: #fff;
}

/* ---- Divider ---- */
.section-divider {
  width: 60px;
  height: 1px;
  background: var(--color-accent);
  margin: var(--space-xl) auto;
  opacity: 0.5;
}

/* ---- Responsive ---- */
@media (max-width: 1023px) {
  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

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

@media (max-width: 767px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .whatsapp-float {
    bottom: var(--space-lg);
    right: var(--space-lg);
  }

  .whatsapp-float a {
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
  }
}