/**
 * Modern Professional Header Styles for Syntia AI
 * 
 * Features:
 * - Glassmorphism design with backdrop blur
 * - Smooth animations and micro-interactions
 * - Responsive design with mobile-first approach
 * - Accessibility-focused with proper ARIA support
 * - Touch-friendly mobile interface
 * 
 * Color Variables:
 * Uses existing CSS variables from styles.css for consistency
 */

/* Header Container */
.modern-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(25px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 0 20px rgba(0, 102, 255, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Navigation Container */
.header-nav {
  width: 100%;
  height: 70px;
}

.nav-container {
  max-width: 95%;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

/* Brand/Logo Section */
.nav-brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  position: relative;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: #ffffff;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-2xl);
  font-family: var(--font-heading);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  padding: 0.5rem;
  border-radius: 12px;
  overflow: hidden;
}

.brand-link:hover::before {
  opacity: 1;
}

.brand-link:hover {
  transform: translateY(-2px);
  color: var(--primary-color, #0066ff);
  text-shadow: 0 0 20px rgba(0, 102, 255, 0.3);
}

.brand-icon {
  width: 36px;
  height: 36px;
  color: var(--secondary-color, #00ffcc);
  filter: drop-shadow(0 0 20px rgba(0, 255, 204, 0.5));
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.brand-logo-img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 8px;
}

.brand-link:hover .brand-logo-img {
  filter: drop-shadow(0 0 25px rgba(0, 255, 204, 0.7));
}

.brand-text {
  font-family: var(--font-heading) !important;
  letter-spacing: var(--letter-spacing-tight);
  background: white !important;
  background-clip: text !important;
  -webkit-background-clip: text !important;
  -webkit-text-fill-color: transparent !important;
  position: relative;
}

/* Desktop Navigation Links */
.nav-links-desktop {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex: 1;
  justify-content: center;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.875rem 1.25rem;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.9);
  font-weight: var(--font-weight-medium);
  font-family: var(--font-ui);
  font-size: var(--font-size-sm);
  border-radius: 10px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  border: 1px solid transparent;
}

.nav-link::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(0, 102, 255, 0.15),
    rgba(0, 255, 204, 0.1),
    transparent
  );
  transition: left 0.6s ease;
}

.nav-link:hover::before {
  left: 100%;
}

.nav-link:hover::after {
  width: 85%;
}

.nav-link i {
  font-size: var(--font-size-base);
  opacity: 0.8;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  filter: drop-shadow(0 0 5px rgba(0, 102, 255, 0.2));
}

/* Active Link Styles */
.nav-link.active {
  color: var(--secondary-color, #00ffcc);
  font-weight: var(--font-weight-semibold);
}

.nav-link.active i {
  opacity: 1;
  color: var(--secondary-color, #00ffcc);
  transform: scale(1.1);
}

/* Dropdown Styles */
.nav-dropdown {
  position: relative;
}

.dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.849);
  font-weight: var(--font-weight-medium);
  font-family: var(--font-ui);
  font-size: var(--font-size-sm);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.dropdown-trigger::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(0, 102, 255, 0.1),
    transparent
  );
  transition: left 0.5s ease;
}

.dropdown-trigger:hover::before {
  left: 100%;
}

.dropdown-trigger:hover::after {
  width: 80%;
}

.dropdown-arrow {
  width: 16px;
  height: 16px;
  transition: all 0.3s ease;
  opacity: 0.7;
}

.dropdown-trigger:hover .dropdown-arrow {
  opacity: 1;
  color: white;
  transform: scale(1.1);
}

.dropdown-trigger[aria-expanded="true"] .dropdown-arrow {
  transform: rotate(180deg);
  color: var(--primary-color, #0066ff);
  opacity: 1;
}

/* Neutralize Active Link Styles (no active highlight on top-level nav links) */
.nav-link.active {
  color: inherit;
  font-weight: var(--font-weight-medium);
}

.nav-link.active i {
  opacity: 0.8;
  color: inherit;
  transform: none;
}

/* Dropdown Styles */
.nav-dropdown {
  position: relative;
}

.dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.849);
  font-weight: var(--font-weight-medium);
  font-family: var(--font-ui);
  font-size: var(--font-size-sm);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.dropdown-trigger::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(0, 102, 255, 0.1),
    transparent
  );
  transition: left 0.5s ease;
}

.dropdown-trigger:hover::before {
  left: 100%;
}

.dropdown-trigger:hover::after {
  width: 80%;
}

.dropdown-arrow {
  width: 16px;
  height: 16px;
  transition: all 0.3s ease;
  opacity: 0.7;
}

.dropdown-trigger:hover .dropdown-arrow {
  opacity: 1;
  color: white;
  transform: scale(1.1);
}

.dropdown-trigger[aria-expanded="true"] .dropdown-arrow {
  transform: rotate(180deg);
  color: var(--primary-color, #0066ff);
  opacity: 1;
}

/* Neutralize Active Dropdown Trigger Styles (desktop) */
.dropdown-trigger.active {
  color: inherit;
  font-weight: var(--font-weight-medium);
}

.dropdown-trigger.active i {
  opacity: 0.8;
  color: inherit;
  transform: none;
}

.dropdown-trigger.active .dropdown-arrow {
  opacity: 0.7;
  color: inherit;
  transform: none;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 0.75rem);
  left: 50%;
  transform: translateX(-50%);
  min-width: 250px;
  max-width: 320px;
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4), 0 8px 32px rgba(0, 102, 255, 0.08),
    0 0 0 1px rgba(0, 102, 255, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-15px) scale(0.92);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 1001;
  overflow: hidden;
}

.dropdown-menu::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(0, 102, 255, 0.4) 20%,
    rgba(0, 255, 204, 0.6) 50%,
    rgba(0, 102, 255, 0.4) 80%,
    transparent 100%
  );
  border-radius: 16px 16px 0 0;
}

.dropdown-menu::after {
  content: "";
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid rgba(8, 8, 20, 0.95);
  filter: drop-shadow(0 -2px 4px rgba(0, 0, 0, 0.2));
}

.dropdown-menu.open {
  display: block;
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0) scale(1);
  animation: dropdownSlideIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes dropdownSlideIn {
  0% {
    opacity: 0;
    transform: translateX(-50%) translateY(-15px) scale(0.92);
  }
  40% {
    opacity: 0.8;
    transform: translateX(-50%) translateY(3px) scale(1.01);
  }
  70% {
    opacity: 0.95;
    transform: translateX(-50%) translateY(-1px) scale(1);
  }
  100% {
    opacity: 1;
    transform: translateX(-50%) translateY(0) scale(1);
  }
}

.dropdown-content {
  padding: 1rem 0.5rem;
  position: relative;
}

.dropdown-content::before {
  content: "";
  position: absolute;
  top: 0;
  left: 1rem;
  right: 1rem;
  height: 1px;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.9);
  font-weight: var(--font-weight-medium);
  font-size: 0.9rem;
  font-family: var(--font-ui);
  line-height: var(--line-height-relaxed);
  border-radius: 12px;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  margin: 0.25rem 0.75rem;
  position: relative;
  overflow: hidden;
  border-left: 3px solid transparent;
}

.dropdown-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    120deg,
    transparent 0%,
    rgba(0, 102, 255, 0.12) 30%,
    rgba(0, 255, 204, 0.08) 70%,
    transparent 100%
  );
  transition: left 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  border-radius: 12px;
}

.dropdown-item::after {
  content: "";
  position: absolute;
  right: 1rem;
  top: 50%;
  width: 6px;
  height: 6px;
  background: var(--secondary-color, #00ffcc);
  border-radius: 50%;
  transform: translateY(-50%) translateX(15px) scale(0);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 0 8px rgba(0, 255, 204, 0.6);
}

.dropdown-item:hover {
  color: #ffffff;
  background: linear-gradient(
    135deg,
    rgba(0, 102, 255, 0.15) 0%,
    rgba(0, 255, 204, 0.08) 50%,
    rgba(0, 102, 255, 0.12) 100%
  );
  transform: translateX(6px) translateY(-1px);
}

.dropdown-item:hover::before {
  left: 100%;
}

.dropdown-item:hover::after {
  opacity: 1;
  transform: translateY(-50%) translateX(0) scale(1);
}

/* Active Dropdown Item Styles */
.modern-header .dropdown-item.active {
  color: #ffffff;
  background: linear-gradient(
    135deg,
    rgba(0, 102, 255, 0.15) 0%,
    rgba(0, 255, 204, 0.08) 50%,
    rgba(0, 102, 255, 0.12) 100%
  );
  transform: translateX(6px) translateY(-1px);
  font-weight: var(--font-weight-semibold);
}

.modern-header .dropdown-item.active::before {
  left: 100%;
}

.modern-header .dropdown-item.active::after {
  opacity: 1;
  transform: translateY(-50%) translateX(0) scale(1);
}

.modern-header .dropdown-item.active i {
  opacity: 1;
  transform: scale(1.15) rotate(5deg);
  color: var(--secondary-color, #00ffcc);
  background: rgba(0, 255, 204, 0.15);
  box-shadow: 0 0 12px rgba(0, 255, 204, 0.3);
}

.modern-header .dropdown-item.active .dropdown-item-description {
  color: rgba(255, 255, 255, 0.8);
}

.modern-header .dropdown-item.active .dropdown-item-badge {
  opacity: 1;
  transform: scale(1);
}

.dropdown-item i {
  font-size: var(--font-size-base);
  opacity: 0.8;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  color: rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  flex-shrink: 0;
}

.dropdown-item:hover i {
  opacity: 1;
  transform: scale(1.15) rotate(5deg);
  color: var(--secondary-color, #00ffcc);
  background: rgba(0, 255, 204, 0.15);
  box-shadow: 0 0 12px rgba(0, 255, 204, 0.3);
}

.dropdown-divider {
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.1) 20%,
    rgba(0, 102, 255, 0.2) 50%,
    rgba(255, 255, 255, 0.1) 80%,
    transparent 100%
  );
  margin: 0.75rem 1.5rem;
  border-radius: 1px;
  position: relative;
}

.dropdown-divider::after {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40%;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(0, 255, 204, 0.3),
    transparent
  );
  filter: blur(0.5px);
}

/* Dropdown Item Content Styling */
.dropdown-item-content {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
}

.dropdown-item-description {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
  line-height: 1.3;
  font-weight: 400;
  transition: color 0.35s ease;
}

.dropdown-item:hover .dropdown-item-description {
  color: rgba(255, 255, 255, 0.8);
}

/* Dropdown Item Badge */
.dropdown-item-badge {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 8px;
  margin-left: auto;
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.dropdown-item:hover .dropdown-item-badge {
  opacity: 1;
  transform: scale(1);
}

/* Auth Buttons */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

.auth-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.875rem 1.75rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 180px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  border: 1px solid transparent;
}
.login-btn {
  border: none;
}
.login-btn:hover {
  border: none;
  box-shadow: none;
}

.signup-btn,
.mobile-signup-btn {
  color: white;
  background: linear-gradient(
    135deg,
    rgb(255, 255, 255) 0%,
    #008cffa4 50%,
    rgb(254, 254, 255) 100%
  );
  background-size: 300% 300%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 15px rgba(0, 102, 255, 0.4), 0 0 30px rgba(0, 102, 255, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  position: relative;
  overflow: hidden;
  animation: gradientShift 4s ease-in-out infinite;
}

.signup-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s ease;
}

.signup-btn::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.3) 0%,
    transparent 70%
  );
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.3s ease;
  pointer-events: none;
}

.signup-btn:hover {
  background: linear-gradient(
    135deg,
    rgb(255, 255, 255) 0%,
    #008cffa4 50%,
    rgb(254, 254, 255) 100%
  );
  background-size: 300% 300%;
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transform: scale(1.02);
  animation: gradientShift 1.5s ease-in-out infinite,
    buttonPulse 2s ease-in-out infinite;
}

.signup-btn:hover::before {
  left: 100%;
}

.signup-btn:hover::after {
  width: 120px;
  height: 120px;
  opacity: 0.6;
}

.signup-btn:active {
  transform: translateY(-1px) scale(0.98);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
}

.signup-btn:focus {
  outline: none;
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.5),
    0 0 0 3px rgba(37, 99, 235, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  animation: gradientShift 1.5s ease-in-out infinite;
}

.signup-btn:focus:not(:hover) {
  transform: translateY(-2px);
}

/* Active Auth Button Styles */
.auth-btn.active {
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.login-btn.active {
  color: var(--primary-color, #2563eb);
  background: rgba(37, 99, 235, 0.1);
  border-color: var(--primary-color, #2563eb);
  font-weight: 700;
}

.signup-btn.active {
  background: linear-gradient(135deg, #002d73, #004d8a, #008073);
  background-size: 300% 300%;
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  animation: gradientShift 1.5s ease-in-out infinite;
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.mobile-menu-btn:hover {
  background: rgba(0, 0, 0, 0.05);
}

.hamburger-line {
  width: 28px;
  height: 3px;
  background: white;
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: center;
}

.hamburger-line:not(:last-child) {
  margin-bottom: 5px;
}

.mobile-menu-btn.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-btn.active .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scale(0);
}

.mobile-menu-btn.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1002;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Touch Interaction Styles */
.touch-pressed {
  transform: scale(0.95);
  opacity: 0.8;
  transition: all 0.1s ease-out;
}

.mobile-menu-btn.touch-pressed {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(0.95);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.mobile-nav-link.touch-pressed,
.mobile-dropdown-trigger.touch-pressed {
  background: rgba(255, 255, 255, 0.15);
  transform: translateX(8px) scale(0.98);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.mobile-dropdown-item.touch-pressed {
  background: rgba(255, 255, 255, 0.12);
  transform: translateX(12px) scale(0.98);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.mobile-auth-btn.touch-pressed {
  transform: scale(0.95);
  filter: brightness(0.85);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Mobile Ripple Effect */
@keyframes mobile-ripple {
  0% {
    transform: scale(0);
    opacity: 0.6;
  }
  100% {
    transform: scale(2);
    opacity: 0;
  }
}

.mobile-ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  pointer-events: none;
  animation: mobile-ripple 0.6s ease-out;
}

/* Enhanced Mobile Button States */
@media (max-width: 768px) {
  .mobile-menu-btn:active {
    transform: scale(0.92);
    background: rgba(255, 255, 255, 0.25);
  }

  .mobile-nav-link:active,
  .mobile-dropdown-trigger:active {
    background: rgba(255, 255, 255, 0.18);
    transform: translateX(10px) scale(0.97);
  }

  .mobile-dropdown-item:active {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(14px) scale(0.97);
  }

  .mobile-menu-close:active {
    transform: scale(0.9);
    background: rgba(255, 255, 255, 0.3);
  }
}

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

.mobile-menu-content {
  position: absolute;
  top: 0;
  right: 0;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background: #050510ef;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-left: 1px solid rgba(255, 255, 255, 0.2);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.mobile-menu-overlay.open .mobile-menu-content {
  transform: translateX(0);
}

.mobile-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  flex-shrink: 0;
}

.mobile-menu-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: white;
  font-weight: 600;
  font-size: 1.1rem;
}

.mobile-menu-brand .brand-icon {
  width: 24px;
  height: 24px;
  filter: brightness(0) invert(1);
}

.mobile-menu-close {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.75rem;
  border-radius: 12px;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
}

.mobile-menu-close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.05);
}

.mobile-menu-close svg {
  width: 26px;
  height: 25px;
  color: var(--text-color, #ffffff);
}

.mobile-menu-body {
  padding: 1.5rem;
}

/* Mobile Navigation Sections */
.mobile-nav-section {
  margin-bottom: 1.5rem;
}
.mobile-nav-section .mobile-nav-link {
  margin-bottom: 1.5rem;
}
.mobile-nav-section:last-child {
  margin-bottom: 0;
}

.mobile-nav-section-title {
  padding: 0.5rem 1rem;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  text-decoration: none;
  color: var(--text-color, #ffffff);
  font-weight: 500;
  font-size: 1rem;
  border-radius: 12px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  margin-bottom: 0.5rem;
  min-height: 56px;
  position: relative;
}

.mobile-nav-link:hover {
  color: var(--primary-color, #2563eb);
  background: rgba(37, 99, 235, 0.08);
  transform: translateX(6px);
}

.mobile-nav-link:hover::before {
  transform: scaleY(1);
}

.mobile-nav-link i:first-child {
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
  opacity: 0.8;
}

.mobile-nav-arrow {
  margin-left: auto;
  font-size: 0.875rem;
  opacity: 0.5;
  transition: all 0.3s ease;
}

.mobile-nav-link:hover .mobile-nav-arrow {
  opacity: 1;
  transform: translateX(4px);
}

/* Neutralize Active Mobile Nav Link Styles */
.mobile-nav-link.active {
  color: inherit;
  background: none;
  transform: none;
  font-weight: 500;
  border-left-color: transparent;
}

.mobile-nav-link.active::before {
  transform: none;
}

.mobile-nav-link.active i:first-child {
  opacity: 0.8;
  color: inherit;
  transform: none;
}

/* Mobile Dropdown */
.mobile-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding: 1rem;
  background: none;
  border: none;
  color: var(--text-color, #ffffff);
  font-size: 1rem;
  font-weight: 500;
  border-radius: 12px;
  transition: all 0.3s ease;
  cursor: pointer;
  min-height: 56px;
  text-align: left;
}

.mobile-dropdown-trigger:hover {
  color: var(--primary-color, #2563eb);
  background: rgba(37, 99, 235, 0.08);
}

.mobile-dropdown-trigger i {
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
  opacity: 0.8;
}

.mobile-dropdown-arrow {
  margin-left: auto;
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
}

.mobile-dropdown-trigger[aria-expanded="true"] .mobile-dropdown-arrow {
  transform: rotate(180deg);
}

/* Neutralize Active Mobile Dropdown Trigger Styles */
.mobile-dropdown-trigger.active {
  color: var(--primary-color, #2563eb);
  background: linear-gradient(
    135deg,
    rgba(37, 99, 235, 0.15),
    rgba(29, 78, 216, 0.08)
  );
  font-weight: 600;
}

.mobile-dropdown-trigger.active i {
  opacity: 1;
  color: var(--secondary-color, #1d4ed8);
  transform: scale(1.1);
}

.mobile-dropdown-content {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: max-height, opacity, transform;
  margin-top: 0.5rem;
}

.mobile-dropdown-content.open {
  max-height: 500px;
  opacity: 1;
  transform: translateY(0);
}

.mobile-dropdown-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.875rem 1rem 0.875rem 2.5rem;
  text-decoration: none;
  color: var(--text-color, #ffffff);
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  margin-bottom: 0.25rem;
  min-height: 48px;
}

.mobile-dropdown-item:hover {
  color: var(--primary-color, #2563eb);
  background: rgba(37, 99, 235, 0.05);
  transform: translateX(4px);
}

.mobile-dropdown-item i {
  font-size: 0.9rem;
  width: 20px;
  text-align: center;
  opacity: 0.7;
}

/* Active Mobile Dropdown Item Styles */
.mobile-dropdown-item.active {
  color: var(--primary-color, #2563eb);
  background: rgba(37, 99, 235, 0.05);
  transform: translateX(4px);
  box-shadow: none;
  font-weight: 500;
}

.mobile-dropdown-item.active i {
  opacity: 0.7;
  color: inherit;
  transform: none;
}

.mobile-dropdown-divider {
  height: 1px;
  background: rgba(0, 0, 0, 0.1);
  margin: 0.5rem 1rem;
}

/* Mobile Auth Section */
.mobile-auth-section {
  margin-top: 6rem;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.mobile-auth-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  width: 100%;
  padding: 1rem;
  text-decoration: none;
  font-weight: 600;
  border-radius: 12px;
  transition: all 0.3s ease;
  margin-bottom: 0.75rem;
  min-height: 56px;
}

.mobile-login-btn {
  color: var(--primary-color, #2563eb);
  background: rgba(37, 99, 235, 0.05);
  border-color: var(--primary-color, #2563eb);
}

.mobile-login-btn:hover {
  color: white;
  background: linear-gradient(
    90deg,
    rgba(9, 9, 194, 0.223),
    rgba(17, 5, 131, 0.358),
    rgba(4, 4, 79, 0.289)
  );
  border-color: var(--primary-color, #2563eb);
}

/* .mobile-signup-btn {
  color: white;
  background: linear-gradient(
    135deg,
    var(--primary-color, #2563eb),
    var(--secondary-color, #1d4ed8)
  );
  background-size: 200% 200%;
  border: 1px solid transparent;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
  position: relative;
  overflow: hidden;
  animation: gradientShift 3s ease-in-out infinite;
} */

.mobile-signup-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s ease;
}

.mobile-signup-btn::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.3) 0%,
    transparent 70%
  );
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.3s ease;
  pointer-events: none;
}

.mobile-signup-btn:hover,
.mobile-signup-btn:active {
  background: linear-gradient(
    135deg,
    var(--secondary-color, #1d4ed8),
    #1e40af,
    #3b82f6
  );
  background-size: 300% 300%;
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transform: scale(1.02);
  animation: gradientShift 1.5s ease-in-out infinite,
    buttonPulse 2s ease-in-out infinite;
}

.mobile-signup-btn:hover::before,
.mobile-signup-btn:active::before {
  left: 100%;
}

.mobile-signup-btn:hover::after,
.mobile-signup-btn:active::after {
  width: 100px;
  height: 100px;
  opacity: 0.6;
}

.mobile-signup-btn:focus {
  outline: none;
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.5),
    0 0 0 3px rgba(37, 99, 235, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  animation: gradientShift 1.5s ease-in-out infinite;
}

.mobile-signup-btn:focus:not(:hover):not(:active) {
  transform: translateY(-2px);
}

/* Active Mobile Auth Button Styles */
.mobile-auth-btn.active {
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.mobile-login-btn.active {
  color: var(--primary-color, #2563eb);
  background: rgba(37, 99, 235, 0.1);
  border-color: var(--primary-color, #2563eb);
  font-weight: 700;
}

.mobile-signup-btn.active {
  background: linear-gradient(
    135deg,
    var(--secondary-color, #1d4ed8),
    #1e40af,
    #3b82f6
  );
  background-size: 300% 300%;
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  animation: gradientShift 1.5s ease-in-out infinite;
}

/* Ripple Effect */
.ripple-effect {
  position: absolute;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.3);
  transform: scale(0);
  animation: ripple 0.6s linear;
  pointer-events: none;
}

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Enhanced Get Started Button Animations */
@keyframes gradientShift {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

@keyframes buttonPulse {
  0%,
  100% {
    box-shadow: 0 8px 32px rgba(37, 99, 235, 0.5),
      0 0 0 1px rgba(255, 255, 255, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  }
  50% {
    box-shadow: 0 12px 40px rgba(37, 99, 235, 0.7),
      0 0 0 2px rgba(255, 255, 255, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.3),
      0 0 20px rgba(59, 130, 246, 0.4);
  }
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%) skewX(-15deg);
  }
  100% {
    transform: translateX(200%) skewX(-15deg);
  }
}

@keyframes glow {
  0%,
  100% {
    filter: brightness(1) saturate(1);
  }
  50% {
    filter: brightness(1.1) saturate(1.2);
  }
}

/* Responsive Design */
@media (max-width: 1200px) {
  .nav-container {
    padding: 0 1.5rem;
  }

  .nav-links-desktop .nav-link {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }

  .auth-btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.875rem;
  }
}

@media (max-width: 1300px) {
  .nav-links-desktop,
  .nav-actions {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .nav-container {
    padding: 0 1rem;
  }

  .brand-link {
    font-size: 1.25rem;
  }

  .brand-icon {
    width: 28px;
    height: 28px;
  }
}

@media (max-width: 768px) {
  .nav-container {
    padding: 0 0.875rem;
  }

  .mobile-menu-content {
    width: 300px;
    max-width: 80vw;
  }

  .mobile-nav-link,
  .mobile-dropdown-trigger {
    min-height: 52px;
    padding: 0.875rem;
  }

  .mobile-dropdown-item {
    min-height: 44px;
    padding: 0.75rem 1rem 0.75rem 2.25rem;
  }
}

@media (max-width: 480px) {
  .mobile-menu-content {
    width: 100vw;
    max-width: 100vw;
  }

  .nav-container {
    padding: 0 0.75rem;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .modern-header {
    background: rgba(255, 255, 255, 1);
    border-bottom: 2px solid #000;
  }

  .dropdown-menu {
    background: rgba(255, 255, 255, 1);
    border: 2px solid #000;
  }

  .mobile-menu-content {
    background: rgba(255, 255, 255, 1);
    border-left: 2px solid #000;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .modern-header,
  .nav-link,
  .dropdown-trigger,
  .dropdown-menu,
  .auth-btn,
  .mobile-menu-btn,
  .mobile-menu-overlay,
  .mobile-menu-content,
  .mobile-nav-link,
  .mobile-dropdown-content,
  .mobile-auth-btn,
  .signup-btn,
  .mobile-signup-btn {
    transition: none;
    animation: none !important;
  }

  .brand-link:hover,
  .nav-link:hover,
  .dropdown-trigger:hover,
  .auth-btn:hover,
  .signup-btn:hover,
  .mobile-signup-btn:hover {
    transform: none;
  }

  .signup-btn::before,
  .signup-btn::after,
  .mobile-signup-btn::before,
  .mobile-signup-btn::after {
    display: none;
  }
}