frontend/src/index.css

@tailwind base;
@tailwind components;
@tailwind utilities;

html, body, #root {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #f3f4f6, #ffffff);
}

/* Card style with enhanced shadow and smoother transitions */
.card {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  border-radius: 1.25rem;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05), 0 2px 8px rgba(0, 0, 0, 0.05);
  padding: 1.25rem;
  transition: all 0.3s ease-in-out;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

@media (min-width: 768px) {
  .card {
    padding: 2rem;
  }
}

/* Primary button with modern gradient and dynamic hover */
.btn-primary {
  background-image: linear-gradient(90deg, #3b82f6, #8b5cf6);
  color: white;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: 0.75rem;
  transition: all 0.3s ease;
}

.btn-primary:hover {
  background-image: linear-gradient(90deg, #2563eb, #7c3aed);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

/* Input field with cleaner focus state */
.input-field {
  width: 100%;
  background-color: rgba(255, 255, 255, 0.9);
  border: 1px solid #d1d5db;
  border-radius: 0.75rem;
  padding: 0.875rem 1.25rem;
  transition: all 0.2s ease;
  font-size: 0.95rem;
}

.input-field:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Custom scrollbar with smoother appearance */
.custom-scrollbar::-webkit-scrollbar {
  width: 6px;
}

.custom-scrollbar::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 3px;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
  background: #a1a1aa;
  border-radius: 3px;
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
  background: #78788c;
}

/* Message bubble styles */
.message-bubble {
  max-width: 85%;
  padding: 0.75rem 1.25rem;
  border-radius: 1rem;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
  transition: all 0.2s ease;
}

.message-bubble.user {
  background: linear-gradient(90deg, #3b82f6, #6366f1);
  color: white;
}

.message-bubble.assistant {
  background: #ffffff;
  color: #1f2937;
  border: 1px solid #e5e7eb;
}