/* Additional Custom Styles */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease-out forwards;
}

.animate-on-scroll {
  opacity: 0;
}

/* Reading Progress Bar */
.reading-progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(0, 0, 0, 0.1);
  z-index: 9999;
}

.reading-progress {
  height: 100%;
  background: linear-gradient(90deg, #3b82f6, #8b5cf6);
  width: 0%;
  transition: width 0.1s ease-out;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: white;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: all 0.3s ease;
}

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(10px);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  transition: opacity 0.3s ease;
}

.mobile-menu.hidden {
  opacity: 0;
  pointer-events: none;
}

.mobile-menu a {
  color: white;
  font-size: 1.5rem;
  font-weight: 600;
  margin: 1rem 0;
  transition: color 0.3s ease;
}

.mobile-menu a:hover {
  color: #3b82f6;
}

/* Dark Mode Styles */
.dark {
  color-scheme: dark;
}

.dark body {
  background-color: #111827;
  color: #f3f4f6;
}

.dark .bg-white {
  background-color: #1f2937 !important;
}

.dark .bg-gray-50 {
  background-color: #111827 !important;
}

.dark .text-gray-800 {
  color: #f3f4f6 !important;
}

.dark .text-gray-700 {
  color: #d1d5db !important;
}

.dark .text-gray-600 {
  color: #9ca3af !important;
}

.dark .border-gray-300 {
  border-color: #4b5563 !important;
}

.dark .shadow-md {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3) !important;
}

.dark .shadow-lg {
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4) !important;
}

/* Search Results Dropdown */
.search-container {
  position: relative;
}

.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: white;
  border-radius: 0.5rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  margin-top: 0.5rem;
  max-height: 400px;
  overflow-y: auto;
  z-index: 1000;
}

.dark .search-results {
  background: #1f2937;
  border: 1px solid #4b5563;
}

/* Form Validation Styles */
.error-message {
  animation: fadeIn 0.3s ease-out;
}

/* Responsive Typography */
@media (max-width: 640px) {
  .text-6xl {
    font-size: 2.5rem;
  }
  
  .text-5xl {
    font-size: 2rem;
  }
  
  .text-4xl {
    font-size: 1.75rem;
  }
  
  .text-3xl {
    font-size: 1.5rem;
  }
}

/* Smooth Transitions */
* {
  transition-property: color, background-color, border-color, transform, opacity;
  transition-duration: 0.2s;
  transition-timing-function: ease-in-out;
}

/* Loading States */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* Focus Styles for Accessibility */
a:focus,
button:focus,
input:focus,
textarea:focus {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  .mobile-menu,
  .back-to-top,
  .reading-progress-container,
  nav,
  footer {
    display: none !important;
  }
}