/* Integrated Navigation CSS - Desktop & Mobile with Off-Canvas */
/* Dựa trên code custom.css đã có và tích hợp off-canvas menu */

/* CRITICAL SERVER FIX - Must be at top - NUCLEAR OPTION */
* {
  margin: 0;
  padding: 0;
}

html {
  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
}

body {
  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  position: relative !important;
}

/* No longer needed - spacing issue was from nav display */

/* FORCE remove any spacing - HIGHEST PRIORITY */
html body {
  margin-top: 0 !important;
  margin-bottom: 0 !important;
  padding-top: 0 !important;
  padding-bottom: 0 !important;
}

/* Remove any potential top spacing from first elements */
body > *:first-child,
body > header:first-child,
body > .main-header:first-child,
body > .header:first-child,
body > #header:first-child,
html body > *:first-child {
  margin-top: 0 !important;
  padding-top: 0 !important;
  border-top: 0 !important;
  top: 0 !important;
}

/* Header positioning - can be sticky now that nav issue is fixed */
.main-header {
  position: sticky !important;
  top: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
}

/* Root defaults for header/nav and UI tokens */
:root {
  --header-bg: #fff;
  --header-border: #e0e6f7;
  --menu-text: #222;
  --submenu-text: #222;
  --submenu-bg: #fff;
  --submenu-hover: red;
  --icon-active: yellow;
  --search-input-test: #222;
  --logo-color: #3a4ca8;
  --main-shadow: 0 4px 24px rgba(60,80,180,.08);
  --main-radius: 0;
  --overlay-bg: rgba(0,0,0,.18);
  
  /* Off-canvas variables */
  --dark-theme-color: #1c1c1c;
  --accent-theme-color: #4caf50;
  --light-theme-color: #fff;
  --nav-width: 300px;
  --nav-padding: 30px;
  --nav-list-offset-vert: 45px;
  --nav-item-offset-vert: 20px;
  --nav-icon-offset-horz: 10px;
}

body.dark {
  --header-bg: #232946;
  --header-border: #333;
  --menu-text: #eee;
  --submenu-text: #222;
  --submenu-bg: #fff;
  --search-input-test: #232946;
  --submenu-hover: red;
  --icon-active: green;
  --logo-color: #fff;
}

/* Base body styles - Force reset for server compatibility */
* {
  box-sizing: border-box;
}

html, body {
  margin: 0 !important;
  padding: 0 !important;
}

body {
  font-family: var(--font-family);
  transition: background .3s, color .3s;
  color: var(--content-color);
  background: var(--light-bg-gradient, var(--bg-main, #f5f5f5));
}

body.dark {
  color: var(--content-color);
  background: var(--dark-bg-gradient, var(--bg-main, #121212));
}

body.dark .logo-light {
  display: none !important;
}

body.dark .logo-dark {
  display: inline;
}

/* Force remove any spacing above header - SERVER FIX */
.main-header:before,
.main-header::before {
  display: none !important;
  content: none !important;
}

/* Main Header Styles - Updated for fixed position */
.main-header {
  background: var(--header-bg);
  border-bottom: 1.5px solid var(--header-border);
  box-shadow: var(--main-shadow);
  width: 100%;
  z-index: 10;
  /* Force remove any potential spacing */
  line-height: 1;
  vertical-align: top;
}

/* Body padding already set above for fixed header */

.menu-container {
  max-width: 1250px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  height: 60px; /* Fixed height for consistent alignment */
}

/* Logo Styles */
.logo {
  font-size: 28px;
  font-weight: 700;
  color: var(--logo-color);
  letter-spacing: 1px;
  transition: color .3s;
  user-select: none;
  display: flex;
  align-items: center;
  height: 100%; /* Full height alignment */
  flex-shrink: 0; /* Prevent logo from shrinking */
}

.logo img {
  height: 45px; /* Slightly larger logo */
  width: auto;
  vertical-align: middle;
}

.logo-dark {
  display: none;
}

/* Desktop Navigation Styles */
.main-nav {
  flex: 1;
  display: flex;
  justify-content: center; /* Center the menu */
  align-items: center;
  height: 100%; /* Full height alignment */
  margin: 0 20px; /* Add margin for balanced spacing */
}

.main-nav .menu {
  list-style: none;
  display: flex;
  gap: 20px; /* Slightly larger gap for better spacing */
  align-items: center;
  margin: 0;
  padding: 0;
  height: 100%; /* Full height alignment */
}

.menu li {
  display: flex;
  align-items: center;
  height: 100%; /* Full height for consistent alignment */
}

.menu li a {
  text-decoration: none;
  color: var(--menu-text);
  font-weight: 500;
  font-size: 1.1rem; /* Slightly smaller for better proportion */
  padding: 0 5px; /* More balanced padding */
  border-radius: 8px;
  transition: background .25s, color .25s, box-shadow .2s;
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  height: auto; /* Let content determine height */
  white-space: nowrap; /* Prevent text wrapping */
}

.menu li a:hover,
.menu li.active > a {
  background: none;
  color: var(--accent-color);
}

/* Submenu Styles (Desktop) */
.has-submenu {
  position: relative;
}

.has-submenu > a::after {
  content: " \f078";
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: .7em;
  margin-left: 7px;
  transition: transform .3s;
  display: inline-block;
}

.has-submenu.open > a::after,
.has-submenu:hover > a::after {
  transform: rotate(-180deg);
}

.submenu {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transform: translateY(-10px) scaleY(.98);
  transition: max-height .4s cubic-bezier(.4,0,.2,1), opacity .3s, transform .3s;
  background: var(--submenu-bg);
  border-radius: var(--main-radius);
  box-shadow: var(--main-shadow);
  position: absolute;
  top: 60px;
  left: 0;
  min-width: 250px;
  z-index: 20;
  padding: 10px 0;
  border-top: 2px solid var(--button-border-color);
  pointer-events: auto;
}

.has-submenu.open .submenu,
.has-submenu:hover .submenu {
  max-height: 500px;
  opacity: 1;
  transform: translateY(0) scaleY(1);
  pointer-events: auto;
}

.submenu li a {
  display: block;
  color: var(--submenu-text);
  background: none;
  border-radius: 0;
  font-size: 1.2rem;
  padding: 10px 20px;
  transition: background .2s, color .2s;
}

.submenu li a:hover {
  background: none;
  color: var(--accent-color);
}

/* Icons Section */
.icons {
  display: flex;
  gap: 15px; /* Consistent spacing */
  align-items: center;
  height: 100%; /* Full height alignment */
  flex-shrink: 0; /* Prevent icons from shrinking */
}

.icons button {
  background: none;
  border: none;
  font-size: 18px; /* Consistent icon size */
  cursor: pointer;
  color: var(--menu-text);
  border-radius: 50%;
  padding: 12px; /* Equal padding for perfect circle */
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: none;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px; /* Fixed width for consistency */
  height: 44px; /* Fixed height for consistency */
  min-width: 44px; /* Prevent shrinking */
  min-height: 44px; /* Prevent shrinking */
}

.icons button:hover {
  background: rgba(0, 0, 0, 0.05);
  transform: scale(1.1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.icons button:active {
  transform: scale(0.95);
  transition: transform 0.1s ease;
}

.icons button:focus {
  outline: none;
}

/* Search button special effects */
#search-toggle {
  position: relative;
}

#search-toggle:hover {
  color: var(--logo-color);
}

#search-toggle.active {
  color: var(--logo-color);
  background: rgba(58, 76, 168, 0.1);
  transform: scale(1.1) rotate(90deg);
}

#search-toggle::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(circle, rgba(58, 76, 168, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.3s ease;
  pointer-events: none;
}

#search-toggle:active::after {
  width: 40px;
  height: 40px;
}

/* Search Wrapper */
.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  width: 0;
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  background: var(--submenu-bg);
  border-radius: 25px;
  margin-left: 10px; /* Consistent spacing with other elements */
  box-shadow: 0 2px 12px rgba(60,80,180,0.1);
  border: 1px solid transparent;
  transform: scale(0.8);
  height: 35px; /* Match button height */
  flex-shrink: 0; /* Prevent shrinking */
}

.search-wrapper.active {
  width: 250px;
  opacity: 1;
  border-color: var(--button-border-color);
  box-shadow: 0 4px 20px rgba(60,80,180,0.15);
  transform: scale(1);
}

#search-input {
  padding: 8px 16px;
  font-size: 15px;
  border: none;
  border-radius: 20px;
  outline: none;
  background: transparent;
  color: var(--search-input-test);
  transition: all 0.3s ease;
  width: 100%;
  font-weight: 400;
  height: 100%; /* Full height of wrapper */
  box-sizing: border-box;
  display: flex;
  align-items: center;
}

#search-input::placeholder {
  color: var(--content-color);
  font-style: italic;
  transition: opacity 0.3s ease;
}

#search-input:focus::placeholder {
  opacity: 0.7;
}

.search-wrapper.active #search-input {
  animation: searchInputSlide 0.4s ease-out;
}

@keyframes searchInputSlide {
  0% {
    transform: translateX(20px);
    opacity: 0;
  }
  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

/* Search loading animation */
.search-wrapper.loading {
  position: relative;
}

.search-wrapper.loading::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(58, 76, 168, 0.3), transparent);
  animation: searchLoading 1.5s infinite;
}

@keyframes searchLoading {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Dark theme support for search */
body.dark .search-wrapper {
  background: var(--header-bg);
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

body.dark .search-wrapper.active {
  border-color: #fff;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

body.dark #search-input {
  color: var(--menu-text);
}

body.dark #search-input::placeholder {
  color: var(--content-color);
}

/* Hamburger Menu */
.hamburger {
  width: 28px;
  height: 22px;
  position: relative;
  display: none;
  cursor: pointer;
  transition: all .3s;
  z-index: 30;
}

.hamburger span {
  background: var(--menu-text);
  height: 3px;
  width: 100%;
  position: absolute;
  left: 0;
  border-radius: 2px;
  transition: all .3s;
}

.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 9px; }
.hamburger span:nth-child(3) { top: 18px; }

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg);
  top: 9px;
}

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

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg);
  top: 9px;
}

/* Mobile Overlay - DISABLED */
.mobile-overlay {
  display: none !important;
  visibility: hidden !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

.mobile-menu-active .mobile-overlay {
  display: none !important;
  visibility: hidden !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

/* Off-canvas overlay for mobile - DISABLED */
@media (max-width: 768px) {
  .nav-open .mobile-overlay {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
  }
  
  /* Ensure menu is visible without overlay */
  .nav-open .nav {
    z-index: 1001 !important;
    pointer-events: auto !important;
    display: block !important;
  }
  
  /* Ensure menu content is clickable */
  .nav-open .nav * {
    pointer-events: auto !important;
  }
}

/* Off-Canvas Menu Styles - Only on Mobile */
@media (max-width: 768px) {
  /* Off-canvas nav visible on mobile */
  .nav {
    position: fixed;
    top: 0;
    bottom: 0;
    left: calc(-1 * var(--nav-width));
    width: var(--nav-width);
    padding: 0;
    box-sizing: border-box;
    background-color: #ffffff !important;
    background: #ffffff !important;
    box-shadow: 4px 0 15px 0 rgba(0, 0, 0, 0.2), 1px 0 10px 0 rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    z-index: 1001;
    border-right: 3px solid #007bff;
    transition: all 0.3s ease-in-out;
    display: flex;
    flex-direction: column;
  }

  /* Logo Section in Off-Canvas */
  .nav__logo-section {
    padding: 80px var(--nav-padding) 15px var(--nav-padding);
    border-bottom: 2px solid rgba(51, 51, 51, 0.08);
    margin-bottom: 0;
    text-align: center;
    position: relative;
  }

  .nav__logo-section::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 20%;
    right: 20%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 123, 255, 0.3), transparent);
  }

  .nav__logo-link {
    display: inline-block;
    text-decoration: none;
    padding: 8px;
    border-radius: 8px;
    transition: background-color 0.3s ease;
  }

  .nav__logo-link:hover {
    background-color: rgba(0, 123, 255, 0.05);
  }

  .nav__logo-img {
    height: 40px;
    width: auto;
    transition: all 0.3s ease;
  }

  .nav__logo-link:hover .nav__logo-img {
    transform: scale(1.05);
  }

  /* Text logo fallback */
  .nav__logo-text {
    font-family: var(--logo-font-family);
    font-size: var(--logo-font-size);
    font-weight: var(--logo-font-weight);
    color: var(--header-logo-color);
    letter-spacing: 1px;
    transition: all 0.3s ease;
  }

  .nav__logo-dark {
    display: none;
  }

  /* Show appropriate logo based on theme */
  .nav--kai-house .nav__logo-light {
    display: none;
  }

  .nav--kai-house .nav__logo-dark {
    display: inline-block;
  }

  /* Nav list styles */
  .nav__list {
    position: relative;
    padding: 10px var(--nav-padding) 20px var(--nav-padding);
    margin: 0;
    list-style-type: none;
    flex: 1;
    overflow-y: auto;
    max-height: calc(100vh - 140px); /* Account for logo section and login section */
  }

  /* Nav item styles */
  .nav__item:not(:last-child) {
    margin-bottom: var(--nav-item-offset-vert);
  }

  /* Nav link styles */
  .nav__link {
    transition: all 0.2s linear;
    display: inline-flex;
    align-items: center;
    color: #333333 !important;
    text-decoration: none;
    font-size: 18px;
    padding: 12px 18px;
    border-radius: 8px;
    width: 100%;
    box-sizing: border-box;
    font-weight: 500;
  }

  .nav__link:hover {
    color: var( --accent-color) !important;
    background-color: rgba(0, 123, 255, 0.1) !important;
    transform: translateX(10px);
  }

  /* Nav link icon styles */
  .nav__link-icon {
    position: relative;
    top: -3px;
    margin-right: var(--nav-icon-offset-horz);
    color: #666666 !important;
    font-size: 24px;
  }

  /* Close icon styles */
  .nav__close {
    position: absolute;
    top: var(--nav-padding);
    right: var(--nav-padding);
    width: 40px;
    height: 40px; /* Increased height for better click area */
    cursor: pointer;
    z-index: 1002; /* Higher than nav */
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.3s ease;
  }

  .nav__close:hover {
    background-color: rgba(255, 0, 0, 0.1);
  }

  .nav__close:before,
  .nav__close:after {
    transition: all 0.2s linear;
    display: block;
    width: 4px;
    height: 28px;
    border-radius: 10px;
    content: "";
    transform-origin: center center;
    background-color: #333333;
  }

  .nav__close:before {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-45deg);
    margin-left: -2px; /* Adjust for visual centering */
  }

  .nav__close:after {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
    margin-left: 2px; /* Adjust for visual centering */
  }

  .nav__close:hover:before,
  .nav__close:hover:after {
    background-color: #007bff;
  }

  /* Login Section Styles */
  .nav__login-section {
    position: relative;
    margin-top: auto;
    padding: 20px var(--nav-padding);
    border-top: 2px solid rgba(51, 51, 51, 0.08);
  }

  .nav__login-section::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 20%;
    right: 20%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 123, 255, 0.3), transparent);
  }

  .nav__login-divider {
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(51, 51, 51, 0.15), transparent);
    margin-bottom: 15px;
    border-radius: 1px;
    position: relative;
  }

  .nav__login-divider::after {
    content: '';
    position: absolute;
    top: 0;
    left: 25%;
    right: 25%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 123, 255, 0.4), transparent);
    border-radius: 1px;
  }

  .nav__login-link {
    display: flex;
    align-items: center;
    color: #666666 !important;
    text-decoration: none;
    font-size: 16px;
    padding: 12px 18px;
    border-radius: 8px;
    transition: all 0.3s ease;
    background: rgba(0, 123, 255, 0.05);
    border: 1px solid rgba(0, 123, 255, 0.2);
  }

  .nav__login-link:hover {
    color: #007bff !important;
    background: rgba(0, 123, 255, 0.15) !important;
    transform: translateX(5px);
    box-shadow: 0 2px 8px rgba(0, 123, 255, 0.2);
  }

  .nav__login-link .nav__link-icon {
    margin-right: 10px;
    font-size: 20px;
    color: #007bff;
  }

  .nav__login-link span {
    font-weight: 500;
  }

  /* Mobile Submenu Styles */
  .nav__item--has-submenu {
    position: relative;
  }

  .nav__link--parent {
    display: flex !important;
    align-items: center;
    position: relative;
    /* Enhanced touch support for Android */
    touch-action: manipulation;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    /* Better Android compatibility */
    -webkit-tap-highlight-color: rgba(0, 123, 255, 0.1);
  }

  .nav__submenu-arrow {
    font-size: 18px !important;
    transition: transform 0.3s ease, background-color 0.2s ease;
    color: #999 !important;
    padding: 12px; /* Increased for better touch */
    margin: -12px;
    border-radius: 50%;
    cursor: pointer;
    min-width: 48px; /* Increased for Android */
    min-height: 48px; /* Increased for Android */
    display: flex;
    align-items: center;
    justify-content: center;
    /* Enhanced touch support for Android */
    touch-action: manipulation;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: rgba(0, 123, 255, 0.2);
    /* Android-specific improvements */
    position: relative;
    z-index: 10;
  }

  .nav__submenu-arrow:hover {
    background: rgba(0, 123, 255, 0.1);
    color: #007bff !important;
  }

  .nav__item--has-submenu.open .nav__submenu-arrow {
    transform: rotate(180deg);
    color: #007bff !important;
  }

  .nav__submenu {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all 0.3s ease;
    background: rgba(0, 0, 0, 0.03);
    border-radius: 8px;
    margin-top: 8px;
  }

  .nav__item--has-submenu.open .nav__submenu {
    max-height: 300px;
    opacity: 1;
    padding: 8px 0;
  }

  .nav__submenu-item {
    margin: 0;
  }

  .nav__submenu-link {
    display: flex !important;
    align-items: center;
    color: #555 !important;
    text-decoration: none;
    font-size: 1.2rem;
    padding: 10px 20px 10px 10px;
    border-radius: 6px;
    margin: 2px 8px;
    transition: all 0.2s ease;
    position: relative;
  }

  .nav__submenu-link:hover {
    color: #007bff !important;
    background: rgba(0, 123, 255, 0.08) !important;
    transform: translateX(8px);
  }

  .nav__submenu-icon {
    font-size: 1.6rem !important;
    margin-right: 12px;
    color: #007bff !important;
    opacity: 0.8;
  }

  .nav__submenu-link:hover .nav__submenu-icon {
    opacity: 1;
  }

  /* Off-canvas effects - Multiple animation types */
  .nav--offcanvas-1 {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    left: calc(-1 * var(--nav-width));
  }

  .nav--offcanvas-1.js-opened {
    left: 0 !important;
    opacity: 1 !important;
    visibility: visible !important;
    background: linear-gradient(135deg, #1c1c1c 0%, #2d2d2d 100%) !important;
    z-index: 1001 !important;
  }

  /* Effect 2: Scale & Translate */
  .nav--offcanvas-2 {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    left: calc(-1 * var(--nav-width));
    transform: scale(0.9);
  }

  .nav--offcanvas-2.js-opened {
    left: 0 !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: scale(1);
    background: linear-gradient(135deg, #1c1c1c 0%, #2d2d2d 100%) !important;
    z-index: 1001 !important;
  }

  /* Effect 3: 3D Rotation */
  .nav--offcanvas-3 {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    left: calc(-1 * var(--nav-width));
    transform: perspective(1000px) rotateY(-90deg);
    transform-origin: right center;
  }

  .nav--offcanvas-3.js-opened {
    left: 0 !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: perspective(1000px) rotateY(0deg);
    background: linear-gradient(135deg, #1c1c1c 0%, #2d2d2d 100%) !important;
    z-index: 1001 !important;
  }

  /* Effect 4: RotateY Transform */
  .nav--offcanvas-4 {
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    left: calc(-1 * var(--nav-width));
    transform: rotateY(-45deg);
    transform-origin: left center;
  }

  .nav--offcanvas-4.js-opened {
    left: 0 !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: rotateY(0deg);
    background: linear-gradient(135deg, #1c1c1c 0%, #2d2d2d 100%) !important;
    z-index: 1001 !important;
  }

  /* Effect 5: Width Animation */
  .nav--offcanvas-5 {
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
    left: 0;
    width: 0;
    overflow: hidden;
  }

  .nav--offcanvas-5.js-opened {
    width: var(--nav-width) !important;
    opacity: 1 !important;
    visibility: visible !important;
    background: linear-gradient(135deg, #1c1c1c 0%, #2d2d2d 100%) !important;
    z-index: 1001 !important;
  }

  /* Page content effects for different menu animations */
  .page__content--offcanvas-1 {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(0);
  }

  .page__content--offcanvas-1.js-opened {
    transform: translateX(var(--nav-width));
  }

  /* Effect 2: Scale & Translate content */
  .page__content--offcanvas-2 {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(0) scale(1);
  }

  .page__content--offcanvas-2.js-opened {
    transform: translateX(calc(var(--nav-width) * 0.5)) scale(0.9);
  }

  /* Effect 3: 3D Perspective content */
  .page__content--offcanvas-3 {
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform: perspective(1000px) rotateY(0deg);
    transform-origin: left center;
  }

  .page__content--offcanvas-3.js-opened {
    transform: perspective(1000px) rotateY(15deg) translateX(50px);
  }

  /* Effect 4: RotateY content */
  .page__content--offcanvas-4 {
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    transform: rotateY(0deg) translateX(0);
  }

  .page__content--offcanvas-4.js-opened {
    transform: rotateY(10deg) translateX(calc(var(--nav-width) * 0.3));
  }

  /* Effect 5: Simple push content */
  .page__content--offcanvas-5 {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(0);
  }

  .page__content--offcanvas-5.js-opened {
    transform: translateX(var(--nav-width));
  }
  
  /* Android-specific improvements for submenu interaction */
  @supports (-webkit-touch-callout: none) {
    .nav__link--parent {
      -webkit-tap-highlight-color: rgba(0, 123, 255, 0.15);
      -webkit-touch-callout: none;
      -webkit-user-select: none;
    }
    
    .nav__submenu-arrow {
      -webkit-tap-highlight-color: rgba(0, 123, 255, 0.3);
      -webkit-touch-callout: none;
      /* Larger touch area for Android */
      padding: 15px;
      margin: -15px;
      min-width: 50px;
      min-height: 50px;
    }
    
    .nav__submenu-arrow:active {
      background: rgba(0, 123, 255, 0.2);
      transform: scale(0.95);
    }
    
    .nav__link--parent:active {
      background: rgba(0, 123, 255, 0.05);
    }
  }
  
  /* Specific Android Chrome improvements */
  @media screen and (-webkit-min-device-pixel-ratio: 0) {
    .nav__submenu-arrow {
      /* Force hardware acceleration */
      will-change: transform, background-color;
      /* Better touch response */
      touch-action: manipulation;
    }
    
    .nav__link--parent {
      /* Prevent text selection on Android */
      -webkit-user-select: none;
      -moz-user-select: none;
      -ms-user-select: none;
      user-select: none;
    }
  }
}

/* Hide off-canvas nav and hamburger on desktop */
@media (min-width: 769px) {
  .nav {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
  }
  
  /* Force hide hamburger on desktop */
  .hamburger,
  #hamburger,
  body .hamburger,
  html body #hamburger {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
  }
  
  /* Ensure desktop navigation and search are visible */
  .main-nav {
    display: flex !important;
    visibility: visible !important;
  }
  
  /* Force show search on desktop */
  #search-toggle,
  .search-wrapper,
  .icons {
    display: flex !important;
    visibility: visible !important;
  }
  
  .icons button {
    display: inline-block !important;
    visibility: visible !important;
  }
  
  /* Ensure search wrapper works on desktop with enhanced animation */
  .search-wrapper {
    width: 0 !important;
    opacity: 0 !important;
    transform: scale(0.8) !important;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
    border: 1px solid transparent !important;
  }
  
  .search-wrapper.active {
    width: 250px !important;
    opacity: 1 !important;
    transform: scale(1) !important;
    border-color: var(--button-border-color) !important;
    box-shadow: 0 4px 20px rgba(60,80,180,0.15) !important;
    margin-bottom: 0;
  }
  
  #search-input {
    display: block !important;
    visibility: visible !important;
    background: transparent !important;
    border: none !important;
    width: 100% !important;
    padding: 8px 16px !important;
    font-size: 15px !important;
  }
  
  /* Search input animation on desktop */
  .search-wrapper.active #search-input {
    animation: searchInputSlide 0.4s ease-out !important;
  }
  
  /* Search button effects on desktop */
  #search-toggle.active {
    color: var(--logo-color) !important;
    background: rgba(58, 76, 168, 0.1) !important;
    transform: scale(1.1) rotate(90deg) !important;
  }
  
  .page {
    background-color: transparent;
    perspective: none;
  }
  
  .page__content {
    min-height: auto;
    background-color: transparent;
  }
}

/* EMERGENCY CSS - Ensure off-canvas nav works on real site */
@media (max-width: 768px) {
  /* Force hide desktop menu completely */
  .main-nav {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    position: absolute !important;
    left: -9999px !important;
  }
  
  /* Force show hamburger button */
  .hamburger {
    display: block !important;
    visibility: visible !important;
    z-index: 1002 !important;
    position: relative !important;
  }
  
  /* Force show off-canvas nav when opened */
  .nav {
    display: block !important;
    visibility: visible !important;
    position: fixed !important;
    top: 0 !important;
    bottom: 0 !important;
    width: var(--nav-width) !important;
    background: #ffffff !important;
    z-index: 1001 !important;
    left: calc(-1 * var(--nav-width)) !important;
    opacity: 0 !important;
    transition: all 0.3s ease-in-out !important;
  }
  
  /* Force show off-canvas when opened */
  .nav.js-opened {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    left: 0 !important;
    z-index: 1001 !important;
  }
}
  
  .nav.nav--offcanvas-1 {
    visibility: visible !important;
    left: calc(-1 * var(--nav-width)) !important;
    opacity: 0 !important;
    transition: all 0.3s ease-in-out !important;
  }
  
  .nav.nav--offcanvas-1.js-opened {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    left: 0 !important;
  }
  
  /* CRITICAL: Ensure nav content is visible */
  .nav .nav__list {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    position: relative !important;
    z-index: 1 !important;
  }
  
  .nav .nav__item {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    margin-bottom: 5px !important;
  }
  
  .nav .nav__link {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
    color: #333333 !important;
    padding: 12px 18px !important;
    text-decoration: none !important;
    font-size: 16px !important;
    font-weight: 500 !important;
  }
  
  .nav .nav__link:hover {
    color: #007bff !important;
    background-color: rgba(0, 123, 255, 0.1) !important;
  }
  
  /* OVERRIDE any conflicting mobile menu styles */
  .mobile-menu-active .main-nav {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    position: absolute !important;
    left: -9999px !important;
  }
  
  /* Ensure hamburger always works */
  #hamburger {
    display: block !important;
    visibility: visible !important;
    cursor: pointer !important;
    z-index: 1002 !important;
  }
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .main-nav .menu {
    gap: 16px;
  }
  
  .main-nav {
    margin: 0 15px; /* Reduce margin on smaller screens */
  }
  
  .menu li a {
    padding: 10px 16px; /* Reduce padding on smaller screens */
    font-size: 1rem;
  }
}

@media (min-width: 1200px) {
  .menu-container {
    padding: 0 30px; /* More padding on larger screens */
  }
  
  .main-nav {
    margin: 0 30px; /* More margin for better spacing */
  }
  
  .main-nav .menu {
    gap: 24px; /* Larger gap on bigger screens */
  }
}

@media (max-width: 768px) {
  /* Force hide desktop navigation */
  .main-nav {
    display: none !important;
    visibility: hidden !important;
  }
  
  /* Show hamburger button */
  .hamburger {
    display: block !important;
    visibility: visible !important;
  }
  
  .logo {
    font-size: 22px;
  }
  
  .menu-container {
    height: 60px;
  }
  
  /* Mobile body padding no longer needed */

  #search-toggle,
  .search-wrapper {
    display: none;
  }
  
  /* Force off-canvas menu to be visible on mobile */
  .nav {
    display: block !important;
  }
  
  /* Ensure off-canvas menu is properly positioned */
  .nav.nav--offcanvas-1 {
    left: calc(-1 * var(--nav-width)) !important;
  }
  
  .nav.nav--offcanvas-1.js-opened {
    left: 0 !important;
    opacity: 1 !important;
    visibility: visible !important;
  }
  
  :root {
    --nav-width: 280px;
    --nav-padding: 20px;
  }
}

@media (min-width: 769px) {
  .main-nav .menu {
    align-items: center;
  }
  
  .main-nav .menu li {
    display: flex;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .logo {
    font-size: 18px;
  }
  
  :root {
    --nav-width: 100vw;
    --nav-padding: 15px;
  }
  
  /* Adjust login section for small screens */
  .nav__login-section {
    bottom: 15px;
    left: 15px;
    right: 15px;
  }
  
  .nav__login-link {
    padding: 10px 15px;
    font-size: 15px;
  }
}

/* Custom Kai House theme for off-canvas */
.nav--kai-house {
  background: linear-gradient(135deg, #1c1c1c 0%, #2d2d2d 100%);
  border-right: 3px solid var(--accent-theme-color);
}

.nav--kai-house .nav__link:hover {
  color: var(--accent-theme-color);
  background-color: rgba(76, 175, 80, 0.15);
}

.nav--kai-house .nav__close:hover:before,
.nav--kai-house .nav__close:hover:after {
  background-color: var(--accent-theme-color);
}

/* Kai House theme for login section */
.nav--kai-house .nav__login-divider {
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.nav--kai-house .nav__login-link {
  color: #cccccc !important;
  background: rgba(76, 175, 80, 0.1);
  border: 1px solid rgba(76, 175, 80, 0.3);
}

.nav--kai-house .nav__login-link:hover {
  color: var(--accent-theme-color) !important;
  background: rgba(76, 175, 80, 0.2) !important;
  box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
}

.nav--kai-house .nav__login-link .nav__link-icon {
  color: var(--accent-theme-color);
}

/* Kai House theme for submenu */
.nav--kai-house .nav__submenu {
  background: rgba(255, 255, 255, 0.05);
}

.nav--kai-house .nav__submenu-link {
  color: #333333 !important;
}

.nav--kai-house .nav__submenu-link:hover {
  color: var(--accent-theme-color) !important;
  background: rgba(76, 175, 80, 0.1) !important;
}

.nav--kai-house .nav__submenu-icon {
  color: #333333 !important;
}

.nav--kai-house .nav__submenu-arrow {
  color: #999 !important;
}

.nav--kai-house .nav__item--has-submenu.open .nav__submenu-arrow {
  color: var(--accent-theme-color) !important;
}

.nav--kai-house .nav__submenu-arrow:hover {
  background: rgba(76, 175, 80, 0.1);
  color: var(--accent-theme-color) !important;
}

/* Kai House theme for logo section */
.nav--kai-house .nav__logo-section {
  border-bottom: 2px solid rgba(255, 255, 255, 0.08);
}

.nav--kai-house .nav__logo-section::after {
  background: linear-gradient(90deg, transparent, rgba(76, 175, 80, 0.5), transparent);
}

.nav--kai-house .nav__logo-link:hover {
  background-color: rgba(76, 175, 80, 0.1);
}

.nav--kai-house .nav__logo-text {
  font-family: var(--logo-font-family);
  font-size: var(--logo-font-size);
  font-weight: var(--logo-font-weight);
  color: var(--header-logo-color);
}

/* Kai House theme for login section */
.nav--kai-house .nav__login-section {
  border-top: 2px solid rgba(255, 255, 255, 0.08);
}

.nav--kai-house .nav__login-section::before {
  background: linear-gradient(90deg, transparent, rgba(76, 175, 80, 0.5), transparent);
}

.nav--kai-house .nav__login-divider {
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
}

.nav--kai-house .nav__login-divider::after {
  background: linear-gradient(90deg, transparent, rgba(76, 175, 80, 0.6), transparent);
}

/* SERVER COMPATIBILITY FIX - Remove any top spacing */
body > *:first-child {
  margin-top: 0 !important;
}

.main-header,
header,
.header,
#header {
  margin-top: 0 !important;
  padding-top: 0 !important;
}

/* Override any potential CSS framework conflicts */
.container:first-child,
.wrapper:first-child,
.content:first-child {
  margin-top: 0 !important;
  padding-top: 0px !important;
}

/* FINAL EMERGENCY CSS - HIGHEST PRIORITY */
@media screen and (max-width: 768px) {
  /* Nuclear option - force hide any desktop menu */
  .main-nav,
  .mobile-menu-active .main-nav,
  body .main-nav,
  html body .main-nav {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    position: absolute !important;
    left: -9999px !important;
    width: 0 !important;
    height: 0 !important;
    overflow: hidden !important;
  }
  
  /* CRITICAL: Ensure only our off-canvas nav is visible */
  nav:not(.nav--offcanvas-1):not(.main-nav) {
    display: none !important;
  }
  
  /* Force our nav to be the only one */
  .nav.nav--offcanvas-1 {
    z-index: 1001 !important;
  }
  
  .nav.nav--offcanvas-1 .nav__close {
    z-index: 1002 !important;
    pointer-events: auto !important;
    display: flex !important;
  }
  
  /* Nuclear option - force show hamburger */
  .hamburger,
  #hamburger,
  body .hamburger,
  html body #hamburger {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    position: relative !important;
    z-index: 1002 !important;
    cursor: pointer !important;
    width: 28px !important;
    height: 22px !important;
  }
  
  /* Nuclear option - force off-canvas menu */
  .nav,
  #off-canvas-nav,
  body .nav,
  html body #off-canvas-nav {
    display: block !important;
    visibility: visible !important;
    position: fixed !important;
    top: 0 !important;
    bottom: 0 !important;
    left: calc(-1 * 280px) !important;
    width: 280px !important;
    background: #ffffff !important;
    z-index: 1001 !important;
    opacity: 0 !important;
    transition: all 0.3s ease-in-out !important;
    box-shadow: 4px 0 15px rgba(0,0,0,0.2) !important;
    border-right: 3px solid #007bff !important;
  }
  
  /* Nuclear option - force show when opened */
  .nav.js-opened,
  #off-canvas-nav.js-opened,
  body .nav.js-opened,
  html body #off-canvas-nav.js-opened {
    left: 0 !important;
    opacity: 1 !important;
    visibility: visible !important;
  }
  
  /* Nuclear option - force nav content visible */
  .nav .nav__list,
  .nav .nav__item,
  .nav .nav__link {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
  }
  
  .nav .nav__link {
    display: flex !important;
    color: #333333 !important;
    padding: 12px 18px !important;
    font-size: 1.2rem !important;
  }
}
/* Them css để đưa nút đăng nhập xuống dưới cùng menu off-canvas */
/* === Ghim "Đăng nhập" xuống đáy menu off-canvas (không đổi PHP/HTML) === */
.nav--kai-house{
  display: grid !important;
  grid-template-rows: auto 1fr auto !important; /* logo | list(scroll) | login */
  height: 100dvh !important;
  max-height: 100dvh !important;
  overflow: hidden !important; /* chỉ phần list cuộn */
  width: 300px !important;
}

.nav--kai-house .nav__logo-section{
  flex-shrink: 0 !important; /* giữ nguyên kích thước */
  padding: 16px 16px 8px !important;
}

/* Phần danh sách cuộn */
.nav--kai-house .nav__list{
  overflow-y: auto !important;
  min-height: 0 !important;
  padding: 0 1rem 12px !important;
  margin-bottom: 0 !important;
}

/* Khu vực đăng nhập: cố định ở hàng cuối, luôn nằm đáy */
.nav--kai-house .nav__login-section{
  position: sticky; /* bám đáy khi list cuộn */
  bottom: 0;
  margin-top: 0 !important;   /* vô hiệu hoá margin-top:auto cũ */
  order: unset !important;     /* vô hiệu hoá order cũ (flex) */
  padding: 12px 16px !important;
  background: <?php echo $light_header_bg; ?> !important;
  border-top: 1px solid <?php echo $light_header_border; ?> !important;
  padding-bottom: calc(12px + env(safe-area-inset-bottom)) !important; /* iOS safe-area */
}

/* Dark mode đồng bộ nền + viền */
body.dark .nav--kai-house .nav__login-section{
  background: <?php echo $dark_header_bg; ?> !important;
  border-top: 1px solid <?php echo $dark_header_border; ?> !important;
}

/* Nút đăng nhập full-width, gọn mép dưới */
.nav--kai-house .nav__link--login{
  width: 100% !important;
  margin: 0 !important;
}