/**
 * Landing Header Motion CSS - Thuê Xe Kim Ngọc
 * Glass morph, dropdown animation, hamburger menu
 */

/* ============================================
   0. HEADER REVEAL ANIMATION (On Page Load)
   ============================================ */
.site-header {
  opacity: 0;
  transform: translateY(-12px);
  animation: headerReveal 420ms cubic-bezier(.2,.8,.2,1) forwards;
}

@keyframes headerReveal {
  from {
    opacity: 0;
    transform: translateY(-12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   0b. CTA GLOW PULSE (Soft ambient glow)
   ============================================ */
.btn-primary {
  position: relative;
  overflow: visible;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: -6px;
  background: linear-gradient(135deg, #DE7621 0%, #F1980A 50%, #D38106 100%);
  border-radius: inherit;
  filter: blur(16px);
  opacity: 0;
  z-index: -1;
  animation: ctaGlow 3s ease-in-out infinite;
}

.btn-primary:hover::before {
  opacity: 0.5;
  animation: none;
}

@keyframes ctaGlow {
  0%, 100% { opacity: 0; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(1.05); }
}

/* ============================================
   0c. ACTIVE NAV INDICATOR (Underline effect)
   ============================================ */
.site-nav a {
  position: relative;
}

.site-nav a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: #DE7621;
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width 0.25s cubic-bezier(.2,.8,.2,1);
}

.site-nav a:hover::after {
  width: calc(100% - 32px);
}

.site-nav a.active::after {
  width: calc(100% - 32px);
  background: #F1980A;
}

.site-nav a.active {
  background: var(--kg-nav-active-bg, rgba(240, 138, 18, .22)) !important;
  color: var(--kg-nav-active-text, #FFFFFF) !important;
}

/* ============================================
   1. SCROLL GLASS MORPH
   ============================================ */
.site-header {
  transition:
    background-color var(--scroll-animation-duration, 300ms) ease,
    box-shadow var(--scroll-animation-duration, 300ms) ease,
    backdrop-filter var(--scroll-animation-duration, 300ms) ease;
}

.site-header.is-scrolled {
  background-color: rgba(var(--surface-rgb, 253, 253, 252), 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
}

/* Dark theme support */
[data-theme="dark"] .site-header.is-scrolled {
  background-color: rgba(var(--surface-rgb, 30, 30, 30), 0.85);
}

/* ============================================
   2. LANGUAGE DROPDOWN ANIMATION
   ============================================ */
.lang-dropdown {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition:
    opacity 200ms ease,
    visibility 200ms ease,
    transform 200ms ease;
  pointer-events: none;
}

.lang-dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

/* ============================================
   3. MOBILE MENU ANIMATION
   ============================================ */
.site-nav {
  transition:
    transform 300ms ease,
    opacity 300ms ease;
}

/* Desktop - horizontal layout */
@media (min-width: 769px) {
  .site-nav {
    display: flex !important;
    align-items: center;
    gap: 12px;
  }

  .site-nav > ul {
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .site-nav > ul > li {
    position: relative;
  }

  .site-nav a,
  .site-nav .nav-link {
    display: inline-flex;
    align-items: center;
    height: 56px;
    padding: 0 22px;
    border-radius: 999px;
    text-decoration: none;
    color: inherit;
    font-size: 18px;
    font-weight: 800;
    letter-spacing: -0.015em;
    transition: background-color 150ms ease, color 150ms ease;
  }

  .site-nav a:hover,
  .site-nav .nav-link:hover {
    background-color: #FFF3E4;
    color: #1f2937;
  }

  .site-nav a.active,
  .site-nav .nav-link.active {
    background-color: #FFF0DE;
    color: #E05F12;
  }

  /* Mega dropdown container */
  .has-mega-dropdown {
    position: static;
  }

  .mega-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    visibility: hidden;
    transition: opacity 200ms ease, visibility 200ms ease;
    z-index: 100;
  }

  .has-mega-dropdown:hover .mega-dropdown,
  .has-mega-dropdown.is-open .mega-dropdown {
    opacity: 1;
    visibility: visible;
  }
}

/* Mobile - slide in from right */
@media (max-width: 768px) {
  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 280px;
    max-width: 85vw;
    background-color: var(--surface, #FDFDFC);
    flex-direction: column;
    align-items: stretch;
    padding: 80px 24px 24px;
    gap: 0;
    transform: translateX(100%);
    opacity: 0;
    z-index: 998;
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
    overflow-y: auto;
  }

  [data-theme="dark"] .site-nav {
    background-color: var(--surface, #1e1e1e);
  }

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

  .site-nav > ul {
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .site-nav > ul > li {
    border-bottom: 1px solid var(--border, #e2e8f0);
  }

  .site-nav > ul > li:last-child {
    border-bottom: none;
  }

  .site-nav a,
  .site-nav .nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-radius: 0;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    color: inherit;
  }

  .site-nav a:hover,
  .site-nav a.active,
  .site-nav .nav-link:hover,
  .site-nav .nav-link.active {
    background-color: rgba(var(--primary-rgb, 222, 118, 33), 0.1);
  }

  .site-nav a.active,
  .site-nav .nav-link.active {
    color: var(--primary);
    font-weight: 600;
  }

  /* Nav overlay backdrop */
  .site-nav::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 300ms ease, visibility 300ms ease;
    z-index: -1;
  }

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

  /* Hide mega dropdown on mobile */
  .mega-dropdown {
    display: none;
  }

  /* Sub-items in mobile nav */
  .mega-dropdown a {
    font-size: 14px;
    padding-left: 32px;
  }
}

/* ============================================
   4. HAMBURGER TO X ANIMATION
   ============================================ */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
  position: relative;
  z-index: 1000;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text, #1a1a1a);
  border-radius: 2px;
  transition:
    transform 300ms ease,
    opacity 200ms ease;
}

.nav-toggle.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Dark theme hamburger */
[data-theme="dark"] .nav-toggle span {
  background-color: var(--text, #f5f5f5);
}

/* ============================================
   5. ACCESSIBILITY FOCUS STYLES
   ============================================ */
.nav-toggle:focus-visible,
.lang-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm, 4px);
}

.lang-option:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}

/* ============================================
   6. REDUCED MOTION SUPPORT
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  .site-header {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .site-nav a::after {
    transition: none;
  }

  .btn-primary::before {
    animation: none;
    opacity: 0;
  }

  .site-nav,
  .lang-dropdown,
  .nav-toggle span,
  .dropdown-menu,
  .mega-dropdown {
    transition: none;
  }

  .site-nav.is-open,
  .lang-dropdown.is-open {
    transform: translateX(0);
    opacity: 1;
  }

  .site-nav.is-open .mega-dropdown {
    display: flex;
  }
}

/* ============================================
   7. TOUCH-FRIENDLY TAP TARGETS
   ============================================ */
@media (max-width: 768px) {
  .header-actions .icon-btn,
  .header-actions .btn {
    min-width: 44px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

/* ============================================
   8. HEADER ACTIONS LAYOUT
   ============================================ */
@media (min-width: 769px) {
  .header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
  }
}

/* ============================================
   9. DROPDOWN MENU VARIABLES - BAO MAI LIGHT
   ============================================ */
:root {
  /* Dark mode default */
  --dropdown-bg: rgba(11, 24, 21, 0.98);
  --dropdown-border: rgba(255, 255, 255, 0.1);
  --dropdown-radius: 22px;
  --dropdown-shadow: 0 20px 48px rgba(0, 0, 0, 0.4);
  --dropdown-transition: 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* Light mode - white/cream dropdown */
[data-theme="light"] {
  --dropdown-bg: rgba(255, 255, 255, .96);
  --dropdown-border: rgba(17, 24, 39, .10);
  --dropdown-radius: 24px;
  --dropdown-shadow: 0 24px 70px rgba(17, 24, 39, .16);
}

/* ============================================
   10. NAVIGATION BASE STYLES
   ============================================ */
.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav .nav-item {
  position: relative;
}

.site-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 16px;
  color: #FDFDFC;
  text-decoration: none;
  font-weight: 500;
  border-radius: var(--radius-pill, 999px);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.site-nav .nav-link:hover,
.site-nav .nav-item.active .nav-link {
  background: rgba(255, 255, 255, 0.08);
}

.site-nav .nav-item.active .nav-link {
  background: var(--primary);
  color: #fff;
}

/* ============================================
   11. DROPDOWN ARROW ANIMATION
   ============================================ */
.nav-item.has-dropdown .dropdown-arrow {
  transition: transform var(--dropdown-transition);
}

.nav-item.has-dropdown.open .dropdown-arrow,
.nav-item.has-dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
}

/* ============================================
   12. REGULAR DROPDOWN MENU - BAO MAI VERTICAL
   Compact width, vertical list, bullet markers
   ============================================ */
.dropdown-menu,
.kg-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  /* Compact width 300-360px as per contract */
  min-width: 320px;
  max-width: 360px;
  background: var(--dropdown-bg);
  border: 1px solid var(--dropdown-border);
  border-radius: var(--dropdown-radius);
  box-shadow: var(--dropdown-shadow);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 12px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px) scale(0.98);
  transition: opacity var(--dropdown-transition),
              transform var(--dropdown-transition),
              visibility var(--dropdown-transition);
  z-index: 1000;
}

.nav-item.has-dropdown:hover .dropdown-menu,
.nav-item.has-dropdown.open .dropdown-menu,
.nav-item.has-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

/* Vertical list for dropdown items */
.dropdown-menu a,
.kg-dropdown-list a {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 14px;
  color: #FDFDFC;
  text-decoration: none;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 700;
  transition: background 0.15s, color 0.15s, transform 0.15s;
}

.dropdown-menu a::before,
.kg-dropdown-list a::before {
  content: '';
  width: 7px;
  height: 7px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transition: background 0.15s;
  margin-right: 12px;
  flex-shrink: 0;
}

.dropdown-menu a:hover,
.kg-dropdown-list a:hover {
  background: rgba(222, 118, 33, 0.15);
  color: var(--primary);
  transform: translateX(3px);
}

.dropdown-menu a:hover::before,
.kg-dropdown-list a:hover::before {
  background: var(--primary);
}

/* Light mode dropdown items */
[data-theme="light"] .dropdown-menu a,
[data-theme="light"] .kg-dropdown-list a {
  color: #374151;
  font-weight: 800;
}

[data-theme="light"] .dropdown-menu a::before,
[data-theme="light"] .kg-dropdown-list a::before {
  background: #D1D5DB;
}

[data-theme="light"] .dropdown-menu a:hover,
[data-theme="light"] .kg-dropdown-list a:hover {
  background: #FFF7ED;
  color: #F47A12;
}

[data-theme="light"] .dropdown-menu a:hover::before,
[data-theme="light"] .kg-dropdown-list a:hover::before {
  background: #F47A12;
}

/* MEGA DROPDOWN - BAO MAI COMPACT 2-COLUMN */
.mega-dropdown,
.kg-mega-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(10px) scale(0.98);
  /* Width 620-680px as per Bao Mai contract */
  width: min(640px, calc(100vw - 32px));
  max-width: 640px;
  background: var(--dropdown-bg);
  border: 1px solid var(--dropdown-border);
  border-radius: 24px;
  box-shadow: var(--dropdown-shadow);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 18px;
  /* Grid 2 columns for vertical stacks */
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dropdown-transition),
              transform var(--dropdown-transition),
              visibility var(--dropdown-transition);
  z-index: 1000;
}

.nav-item.has-mega-dropdown:hover .mega-dropdown,
.nav-item.has-mega-dropdown.open .mega-dropdown,
.nav-item.has-mega-dropdown:focus-within .mega-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0) scale(1);
}

/* Remove flex inner wrapper */
.mega-dropdown-inner {
  display: contents;
}

.mega-column,
.kg-mega-col {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.mega-column-title,
.kg-mega-title {
  min-height: 48px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  border-radius: 14px;
  background: #FFF3E4;
  color: #1F2937;
  font-size: 14px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .02em;
  margin: 0;
}

.mega-column ul,
.kg-mega-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.mega-column li {
  display: block;
  width: 100%;
}

.mega-column a {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 46px;
  padding: 9px 12px 9px 32px;
  color: #374151;
  text-decoration: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.28;
  white-space: normal;
  transition: background 0.15s, color 0.15s, transform 0.15s;
}

.mega-column a::before {
  content: '';
  position: absolute;
  left: 12px;
  width: 7px;
  height: 7px;
  background: #D1D5DB;
  border-radius: 999px;
  transition: background 0.15s;
}

.mega-column a:hover {
  background: #FFF7ED;
  color: #F47A12;
  transform: translateX(3px);
}

.mega-column a:hover::before {
  background: #F47A12;
}

/* ============================================
   14. MOBILE DROPDOWN STYLES
   ============================================ */
@media (max-width: 1024px) {
  .site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bm-dropdown-bg, rgba(255, 255, 255, .96));
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: flex-start;
    padding: 80px 24px 24px;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 999;
    overflow-y: auto;
  }

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

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  .site-nav .nav-item {
    width: 100%;
  }

  .site-nav .nav-link {
    width: 100%;
    padding: 16px;
    font-size: 16px;
    color: var(--bm-nav-text, #1f2937);
  }

  .dropdown-menu,
  .mega-dropdown {
    position: static;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--bm-dropdown-border, rgba(17, 24, 39, .10));
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(17, 24, 39, .10);
    margin-top: 8px;
    padding: 12px;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
    /* Grid layout on mobile too */
    grid-template-columns: 1fr;
  }

  .site-nav .nav-item.open .dropdown-menu,
  .site-nav .nav-item.open .mega-dropdown {
    display: grid;
  }

  .mega-dropdown-inner {
    display: contents;
  }

  .nav-toggle {
    display: flex;
  }
  
  /* Mobile mega dropdown items */
  .mega-column a {
    color: var(--bm-dropdown-text, #374151) !important;
    min-height: 40px;
  }
  
  .mega-column-title {
    background: var(--bm-dropdown-title-bg, #FFF3E4) !important;
    color: var(--bm-dropdown-title-text, #1f2937) !important;
  }
}

@media (min-width: 1025px) {
  .nav-toggle {
    display: none;
  }

  .dropdown-menu,
  .mega-dropdown {
    display: block !important;
  }
}

/* ============================================
   LIGHT THEME MOBILE NAV - BAO MAI LIGHT
   White/cream nav in light mode
   ============================================ */
[data-theme="light"] .site-nav {
  background: var(--bm-dropdown-bg, rgba(255, 255, 255, .96)) !important;
}

[data-theme="light"] .site-nav a,
[data-theme="light"] .site-nav .nav-link {
  color: var(--bm-nav-text, #1f2937) !important;
}

[data-theme="light"] .site-nav > ul > li {
  border-color: rgba(17, 24, 39, .10) !important;
}

[data-theme="light"] .dropdown-menu,
[data-theme="light"] .mega-dropdown {
  background: var(--bm-dropdown-bg, rgba(255, 255, 255, .96)) !important;
  border-color: var(--bm-dropdown-border, rgba(17, 24, 39, .10)) !important;
  box-shadow: var(--bm-dropdown-shadow, 0 24px 70px rgba(17, 24, 39, .16)) !important;
}

[data-theme="light"] .dropdown-menu a,
[data-theme="light"] .mega-column a {
  color: var(--bm-dropdown-text, #374151) !important;
}

[data-theme="light"] .dropdown-menu a:hover,
[data-theme="light"] .mega-column a:hover {
  background: #FFF7ED !important;
  color: var(--bm-accent, #F47A12) !important;
}

[data-theme="light"] .mega-column-title {
  color: var(--bm-dropdown-title-text, #1f2937) !important;
  background: var(--bm-dropdown-title-bg, #FFF3E4) !important;
}

/* Mobile menu actions in light mode */
[data-theme="light"] .site-nav .btn-call {
  background: rgba(17, 24, 39, 0.06) !important;
  color: var(--bm-nav-text, #1f2937) !important;
}

[data-theme="light"] .site-nav .btn-zalo {
  background: #0068ff !important;
  color: #fff !important;
}

[data-theme="light"] .site-nav .btn-primary {
  background: var(--primary) !important;
  color: #fff !important;
}