/* ==========================================================================
   NAVIGATION STYLES - CUSTOM SLIDE-IN PANEL & SCROLL TRANSITIONS
   ========================================================================== */

/* Header Wrapper */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.25rem 0;
  transition: background-color 350ms ease-in-out, padding 350ms ease-in-out, box-shadow 350ms ease-in-out;
  background-color: rgba(6, 31, 26, 0.4);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(212, 175, 55, 0.15);
}

.site-header.scrolled {
  background-color: rgba(6, 31, 26, 0.96);
  padding: 0.85rem 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid rgba(212, 175, 55, 0.25);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Brand Identity Logo */
.header-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  z-index: 1001;
}

.header-logo .logo-icon {
  width: 42px;
  height: 42px;
  background: var(--gold-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-emerald-deep);
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 1.25rem;
  box-shadow: var(--shadow-gold);
}

.header-logo .logo-text-wrap {
  display: flex;
  flex-direction: column;
}

.header-logo .brand-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--gold-primary);
  letter-spacing: 0.02em;
  line-height: 1.1;
}

.header-logo .brand-subtitle {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-secondary-light);
}

/* Actions Right (WhatsApp CTA + Hamburger Button) */
.header-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.header-book-btn {
  padding: 0.6rem 1.4rem;
  font-size: 0.875rem;
  min-height: 42px;
}

/* Animated Hamburger Trigger */
.menu-toggle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(212, 175, 55, 0.12);
  border: 1px solid rgba(212, 175, 55, 0.3);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  z-index: 1002;
  transition: all var(--transition-normal);
  position: relative;
}

.menu-toggle:hover,
.menu-toggle:focus-visible {
  background: rgba(212, 175, 55, 0.25);
  border-color: var(--gold-primary);
  outline: none;
}

.menu-toggle .bar {
  width: 22px;
  height: 2px;
  background-color: var(--gold-primary);
  border-radius: 2px;
  transition: transform 350ms cubic-bezier(0.16, 1, 0.3, 1), opacity 350ms ease, width 350ms ease;
}

/* Hamburger to X Transform */
.menu-toggle[aria-expanded="true"] .bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.menu-toggle[aria-expanded="true"] .bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Dimmed Overlay Backdrop */
.nav-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(4, 26, 21, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 400ms ease, visibility 400ms ease;
  z-index: 1005;
}

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

/* Slide-in Navigation Panel */
.nav-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  max-width: 440px;
  height: 100vh;
  background: var(--bg-emerald-deep);
  border-left: 1px solid rgba(212, 175, 55, 0.25);
  z-index: 1010;
  transform: translateX(100%);
  transition: transform 450ms cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 3rem 2.5rem;
  box-shadow: -15px 0 40px rgba(0, 0, 0, 0.5);
  overflow-y: auto;
}

.nav-panel.is-open {
  transform: translateX(0);
}

/* Panel Header inside Slide-in */
.nav-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(212, 175, 55, 0.15);
}

.nav-panel-title {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--gold-primary);
  font-weight: 700;
}

.nav-close-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(212, 175, 55, 0.3);
  color: var(--gold-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-close-btn:hover {
  background: var(--gold-primary);
  color: var(--bg-emerald-deep);
}

/* Navigation List & Staggered Animation */
.nav-menu-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.nav-menu-item {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 400ms ease, transform 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-panel.is-open .nav-menu-item {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger Delays for items 1-6 */
.nav-panel.is-open .nav-menu-item:nth-child(1) { transition-delay: 100ms; }
.nav-panel.is-open .nav-menu-item:nth-child(2) { transition-delay: 150ms; }
.nav-panel.is-open .nav-menu-item:nth-child(3) { transition-delay: 200ms; }
.nav-panel.is-open .nav-menu-item:nth-child(4) { transition-delay: 250ms; }
.nav-panel.is-open .nav-menu-item:nth-child(5) { transition-delay: 300ms; }
.nav-panel.is-open .nav-menu-item:nth-child(6) { transition-delay: 350ms; }

.nav-link {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  color: var(--bg-cream);
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  min-height: 48px;
  position: relative;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--gold-primary);
  padding-left: 10px;
  outline: none;
}

/* Active Page Indicator */
.nav-link.active {
  color: var(--gold-primary);
  font-weight: 700;
}

.nav-link.active::after {
  content: '';
  width: 8px;
  height: 8px;
  background-color: var(--gold-primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--gold-primary);
}

.nav-link-badge {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--gold-primary);
  color: var(--bg-emerald-deep);
  font-weight: 700;
}

/* Panel Footer info */
.nav-panel-footer {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(212, 175, 55, 0.15);
}

.nav-contact-box {
  margin-bottom: 1.5rem;
}

.nav-contact-box p {
  color: var(--text-secondary-light);
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}

.nav-contact-box a {
  color: var(--gold-primary);
  font-weight: 600;
  font-size: 1rem;
}

/* Mobile responsive styles */
@media (max-width: 480px) {
  .nav-panel {
    max-width: 100%;
    padding: 2.5rem 1.5rem;
  }
  
  .nav-link {
    font-size: 1.5rem;
  }

  .header-logo .brand-title {
    font-size: 1.15rem;
  }
  
  .header-book-btn {
    display: none; /* Hide top btn on tiny screens to avoid header clutter */
  }
}