/* ==========================================================================
   Kunal Resort & Restaurant - Header & Navigation CSS
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Skip Link (Accessibility)
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--color-accent);
  color: var(--color-primary);
  padding: var(--spacing-3) var(--spacing-6);
  font-family: var(--font-family-sans);
  font-weight: 600;
  z-index: 9999;
  transition: top var(--transition-fast);
  border-bottom-right-radius: var(--radius-sm);
  outline: none;
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-primary);
}

/* --------------------------------------------------------------------------
   2. Main Header Shell
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1010; /* Enforced higher z-index to stack above mobile overlay */
  transition: background-color var(--transition-normal), 
              padding var(--transition-normal), 
              box-shadow var(--transition-normal);
  padding: var(--spacing-4) 0; /* Reduced padding to make header more compact */
  background-color: rgba(15, 46, 35, 0); /* Transparent by default */
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* Header Sticky State (Triggered on Scroll) */
.header--sticky {
  background-color: rgba(3, 26, 16, 0.95); /* Deep forest-dark green matching logo background */
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: var(--spacing-3) 0;
  box-shadow: var(--shadow-md);
  border-bottom: 1px solid rgba(212, 175, 55, 0.15); /* Accent tint border */
}

/* Solid Header State (For pages without hero banners) */
.header--solid {
  background-color: rgb(3, 26, 16); /* Solid deep forest-dark green */
  border-bottom: 1px solid rgba(212, 175, 55, 0.15);
}

/* Container limits */
.header__container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* --------------------------------------------------------------------------
   3. Brand Logo Layout
   -------------------------------------------------------------------------- */
.header__logo {
  display: flex;
  align-items: center;
  z-index: 1010; /* Keep above mobile overlay */
}

.header__logo-link {
  font-family: var(--font-family-serif);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-light);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  transition: color var(--transition-normal);
  outline: none;
}

.header__logo-img {
  height: 60px;
  width: auto;
  display: block;
  transition: transform var(--transition-normal);
}

@media (max-width: 768px) {
  .header__logo-img {
    height: 52px;
  }
}

.header__logo-link:hover .header__logo-img {
  transform: scale(1.04);
}

.header__logo-link:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 6px;
}

.header__logo-sub {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-xs);
  font-weight: 300;
  letter-spacing: 0.3em;
  color: var(--color-accent);
  margin-top: 2px;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   4. Desktop Navigation Linkages
   -------------------------------------------------------------------------- */
.header__nav {
  display: none; /* Hidden on mobile */
}

@media (min-width: 1024px) {
  .header__nav {
    display: block;
  }
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-6);
  align-items: center;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--spacing-2) 0;
  transition: color var(--transition-fast);
  outline: none;
  position: relative;
}

.nav-link:hover {
  color: var(--color-accent);
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

/* Elegant Underline Hover Animation */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 100%;
  height: 1.5px;
  background-color: var(--color-accent);
  transform: translateX(-50%) scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-normal);
}

.nav-link:hover::after {
  transform: translateX(-50%) scaleX(1);
}

/* Current Active Link Indicator */
.nav-link--active {
  color: var(--color-accent) !important;
}

.nav-link--active::after {
  transform: translateX(-50%) scaleX(1);
  background-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   5. Action Buttons & Quick Contact Icons (Right-Side Actions)
   -------------------------------------------------------------------------- */
.header__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  z-index: 1010;
}

.header__action-icon-link {
  display: none; /* Desktop only */
  color: var(--color-text-light);
  transition: color var(--transition-fast), transform var(--transition-fast);
  outline: none;
}

@media (min-width: 1024px) {
  .header__action-icon-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

.header__action-icon-link:hover {
  color: var(--color-accent);
  transform: translateY(-2px);
}

.header__action-icon-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

.header__action-icon {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.header__action-icon--whatsapp:hover {
  color: #25D366; /* Specific WhatsApp Green */
}

/* "Book Now" Desktop CTA Styling */
.header__cta-btn {
  display: none;
  font-family: var(--font-family-sans);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-light);
  background-color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-normal),
              color var(--transition-normal),
              border-color var(--transition-normal),
              box-shadow var(--transition-normal),
              transform var(--transition-fast);
  outline: none;
}

@media (min-width: 1024px) {
  .header__cta-btn {
    display: inline-block;
  }
}

.header__cta-btn:hover {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 4px 15px rgba(212, 175, 55, 0.2);
  transform: translateY(-1px);
}

.header__cta-btn:active {
  transform: translateY(0);
}

.header__cta-btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   6. Mobile Hamburg & Navigation Trigger
   -------------------------------------------------------------------------- */
.header__mobile-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-text-light);
  transition: color var(--transition-fast);
  outline: none;
  position: relative;
  z-index: 1010;
}

@media (min-width: 1024px) {
  .header__mobile-toggle {
    display: none;
  }
}

.header__mobile-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  border-radius: var(--radius-sm);
}

/* Custom CSS hamburger animation */
.hamburger-box {
  width: 24px;
  height: 18px;
  position: relative;
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: currentColor;
  position: absolute;
  left: 0;
  transition: transform var(--transition-normal),
              opacity var(--transition-normal),
              background-color var(--transition-normal);
}

.hamburger-line--1 { top: 0; transform-origin: top left; }
.hamburger-line--2 { top: 8px; }
.hamburger-line--3 { top: 16px; transform-origin: bottom left; }

/* Morph Hamburger to Close button (X) when menu active */
.header__mobile-toggle[aria-expanded="true"] {
  color: var(--color-accent);
}

.header__mobile-toggle[aria-expanded="true"] .hamburger-line--1 {
  transform: rotate(45deg) translate(2.5px, -1px);
}

.header__mobile-toggle[aria-expanded="true"] .hamburger-line--2 {
  opacity: 0;
}

.header__mobile-toggle[aria-expanded="true"] .hamburger-line--3 {
  transform: rotate(-45deg) translate(2.5px, 1px);
}

/* --------------------------------------------------------------------------
   7. Mobile Fullscreen Slide Overlay Menu
   -------------------------------------------------------------------------- */
.mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  height: 100vh;
  background-color: var(--color-primary);
  background-image: linear-gradient(135deg, rgba(15, 46, 35, 1) 0%, rgba(8, 26, 20, 1) 100%);
  z-index: 1005;
  transform: translateX(100%); /* Default hidden offscreen */
  visibility: hidden; /* Hide from layout, accessibility, and focus when closed */
  transition: transform var(--transition-normal) cubic-bezier(0.16, 1, 0.3, 1),
              visibility var(--transition-normal) cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--spacing-20) var(--spacing-8) var(--spacing-12);
  overflow-y: auto;
}

/* Toggle Menu via JS class */
.mobile-nav--open {
  transform: translateX(0);
  visibility: visible;
}

.mobile-nav__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
  align-items: center;
  margin-bottom: var(--spacing-8);
}

.mobile-nav__item {
  opacity: 0;
  transform: translateY(15px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  transition-delay: 50ms;
}

/* Stagger links fade-in when menu is visible */
.mobile-nav--open .mobile-nav__item {
  opacity: 1;
  transform: translateY(0);
}

/* Generate delayed transitions for 9 menu items */
.mobile-nav--open .mobile-nav__item:nth-child(1) { transition-delay: 100ms; }
.mobile-nav--open .mobile-nav__item:nth-child(2) { transition-delay: 150ms; }
.mobile-nav--open .mobile-nav__item:nth-child(3) { transition-delay: 200ms; }
.mobile-nav--open .mobile-nav__item:nth-child(4) { transition-delay: 250ms; }
.mobile-nav--open .mobile-nav__item:nth-child(5) { transition-delay: 300ms; }
.mobile-nav--open .mobile-nav__item:nth-child(6) { transition-delay: 350ms; }
.mobile-nav--open .mobile-nav__item:nth-child(7) { transition-delay: 400ms; }
.mobile-nav--open .mobile-nav__item:nth-child(8) { transition-delay: 450ms; }
.mobile-nav--open .mobile-nav__item:nth-child(9) { transition-delay: 500ms; }

.mobile-nav__link {
  font-family: var(--font-family-serif);
  font-size: var(--font-size-2xl);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--spacing-2) var(--spacing-4);
  display: inline-block;
  transition: color var(--transition-fast), transform var(--transition-fast);
  outline: none;
}

.mobile-nav__link:hover,
.mobile-nav__link:focus-visible {
  color: var(--color-accent);
  transform: scale(1.05);
}

.mobile-nav__link:focus-visible {
  outline: 2px solid var(--color-accent);
  border-radius: var(--radius-sm);
}

.mobile-nav__link--active {
  color: var(--color-accent) !important;
}

/* Mobile Quick Actions Block (WhatsApp / Call / Book) */
.mobile-nav__actions {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-normal) 550ms, transform var(--transition-normal) 550ms;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-4);
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
}

.mobile-nav--open .mobile-nav__actions {
  opacity: 1;
  transform: translateY(0);
}

.mobile-nav__contacts {
  display: flex;
  gap: var(--spacing-6);
  justify-content: center;
  width: 100%;
  margin-bottom: var(--spacing-2);
}

.mobile-nav__contact-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: var(--radius-round);
  background-color: rgba(255, 255, 255, 0.06);
  color: var(--color-text-light);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: transform var(--transition-fast), 
              background-color var(--transition-fast),
              color var(--transition-fast);
  outline: none;
}

.mobile-nav__contact-btn:hover,
.mobile-nav__contact-btn:focus-visible {
  transform: translateY(-3px);
  background-color: rgba(255, 255, 255, 0.15);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.mobile-nav__contact-btn--whatsapp:hover,
.mobile-nav__contact-btn--whatsapp:focus-visible {
  color: #25D366;
  border-color: #25D366;
  background-color: rgba(37, 211, 102, 0.1);
}

.mobile-nav__contact-btn:focus-visible {
  outline: 2px solid var(--color-accent);
}

.mobile-nav__contact-icon {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

/* Mobile Book Now Action Button */
.mobile-nav__book-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  background-color: var(--color-accent);
  padding: var(--spacing-4) 0;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-normal), 
              color var(--transition-normal), 
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
  outline: none;
  box-shadow: 0 4px 12px rgba(212, 175, 55, 0.2);
}

.mobile-nav__book-btn:hover,
.mobile-nav__book-btn:focus-visible {
  background-color: var(--color-bg-light);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 255, 255, 0.15);
}

.mobile-nav__book-btn:focus-visible {
  outline: 3px solid var(--color-accent);
}

/* --------------------------------------------------------------------------
   8. Ultra-Wide Optimization
   -------------------------------------------------------------------------- */
@media (min-width: 1600px) {
  .header__container {
    max-width: 1500px;
  }
  .nav-list {
    gap: var(--spacing-8);
  }
  .nav-link {
    font-size: var(--font-size-base);
  }
}

/* Smooth fade out for logo and CTA when mobile menu is active */
.header:has(.header__mobile-toggle[aria-expanded="true"]) .logo,
.header:has(.header__mobile-toggle[aria-expanded="true"]) .header__cta-btn {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.logo,
.header__cta-btn {
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}