/* Enhanced loading states and mobile navigation UX improvements */

/* Loading skeleton animations */
.skeleton {
  background: linear-gradient(90deg, #374151 25%, #4b5563 50%, #374151 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
  border-radius: 0.375rem;
  color: transparent !important;
}

.skeleton-text {
  height: 1rem;
  margin-bottom: 0.5rem;
}

.skeleton-title {
  height: 2rem;
  width: 70%;
  margin-bottom: 1rem;
}

.skeleton-card {
  height: 200px;
  margin-bottom: 1rem;
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Loading spinner */
.loading-spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 3px solid rgba(59, 130, 246, 0.2);
  border-radius: 50%;
  border-top-color: #3b82f6;
  animation: spin 1s ease-in-out infinite;
}

.loading-spinner.small {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Enhanced mobile navigation */
.mobile-menu {
  transform: translateX(-100%);
  transition: transform 0.3s ease-in-out;
  position: fixed;
  top: 0;
  left: 0;
  width: 80%;
  max-width: 300px;
  height: 100vh;
  background: rgba(17, 24, 39, 0.98);
  backdrop-filter: blur(10px);
  z-index: 100;
  overflow-y: auto;
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

/* Enhanced hamburger menu */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 24px;
  height: 24px;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: #fff;
  transition: all 0.3s ease;
  transform-origin: center;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Touch-friendly mobile menu items */
.mobile-menu-nav {
  padding: 2rem 1rem;
}

.mobile-menu-nav a {
  display: block;
  padding: 1rem;
  color: #e5e7eb;
  text-decoration: none;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  touch-action: manipulation;
}

.mobile-menu-nav a:hover,
.mobile-menu-nav a:focus {
  background: rgba(59, 130, 246, 0.1);
  color: #3b82f6;
  transform: translateX(4px);
}

.mobile-menu-nav a:focus {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

/* Page loading states */
.page-loading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #3b82f6, #8b5cf6, #3b82f6);
  background-size: 200% 100%;
  animation: pageLoading 1.5s ease-in-out infinite;
  z-index: 1000;
}

@keyframes pageLoading {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Content fade-in animation */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.6s ease forwards;
}

.fade-in-delay-1 {
  animation-delay: 0.1s;
}

.fade-in-delay-2 {
  animation-delay: 0.2s;
}

.fade-in-delay-3 {
  animation-delay: 0.3s;
}

@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Button loading states */
.btn.loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Responsive improvements */
@media (max-width: 768px) {
  .mobile-menu {
    width: 85%;
  }
  
  .mobile-menu-nav a {
    padding: 1.25rem 1rem;
    font-size: 1.25rem;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .hamburger span {
    background: #fff;
    border: 1px solid #000;
  }
  
  .mobile-menu-nav a:focus {
    outline-width: 3px;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .skeleton,
  .loading-spinner,
  .mobile-menu,
  .mobile-menu-overlay,
  .hamburger span,
  .page-loading,
  .fade-in {
    animation: none;
    transition: none;
  }
}