frontend/src/index.css

@import 'tailwindcss/base';
@import 'tailwindcss/components';
@import 'tailwindcss/utilities';

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  @apply bg-gray-100 dark:bg-gray-800;
}

::-webkit-scrollbar-thumb {
  @apply bg-gray-300 dark:bg-gray-600 rounded-full;
}

::-webkit-scrollbar-thumb:hover {
  @apply bg-gray-400 dark:bg-gray-500;
}

/* Loading dots animation */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 4px;
}

.typing-indicator .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: currentColor;
  opacity: 0.4;
  animation: typing-dot 1.4s infinite ease-in-out;
}

.typing-indicator .dot:nth-child(1) {
  animation-delay: 0s;
}

.typing-indicator .dot:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator .dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing-dot {
  0%, 60%, 100% {
    opacity: 0.4;
    transform: scale(1);
  }
  30% {
    opacity: 1;
    transform: scale(1.2);
  }
}

/* Message bubble animations */
.message-enter {
  opacity: 0;
  transform: translateY(20px);
}

.message-enter-active {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 300ms ease-out, transform 300ms ease-out;
}

/* File upload hover effects */
.file-drop-zone {
  transition: all 0.2s ease-in-out;
}

.file-drop-zone:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Gradient text */
.gradient-text {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Glass morphism effect */
.glass {
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  background-color: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.125);
}

.glass.dark {
  background-color: rgba(17, 24, 39, 0.8);
  border: 1px solid rgba(75, 85, 99, 0.3);
}

/* Button hover effects */
.btn-primary {
  @apply bg-primary-600 hover:bg-primary-700 focus:ring-primary-500;
  transition: all 0.2s ease-in-out;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Code syntax highlighting overrides */
.prose pre {
  @apply bg-gray-900 dark:bg-gray-950;
}

.prose code {
  @apply bg-gray-100 dark:bg-gray-800 text-gray-800 dark:text-gray-200 px-1 py-0.5 rounded text-sm;
}

/* Message content styling */
.message-content {
  @apply prose prose-sm max-w-none dark:prose-invert;
}

.message-content p:last-child {
  margin-bottom: 0;
}

.message-content ul, .message-content ol {
  @apply my-2;
}

.message-content li {
  @apply my-1;
}

/* Enhanced Chat Input Styles */
.chat-input-container {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.chat-input-container:focus-within {
  transform: translateY(-1px);
  box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.25);
}

.chat-input {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0.01em;
}

.chat-input::placeholder {
  font-weight: 400;
  opacity: 0.6;
  transition: opacity 0.3s ease;
}

.chat-input:focus::placeholder {
  opacity: 0.4;
}

/* Enhanced scrollbar for textarea */
.chat-input::-webkit-scrollbar {
  width: 4px;
}

.chat-input::-webkit-scrollbar-track {
  background: transparent;
}

.chat-input::-webkit-scrollbar-thumb {
  background: rgba(156, 163, 175, 0.5);
  border-radius: 2px;
}

.chat-input::-webkit-scrollbar-thumb:hover {
  background: rgba(156, 163, 175, 0.8);
}

/* Input focus indicator animation */
.input-focus-indicator {
  transform-origin: left;
  animation: expand 0.3s ease-out;
}

@keyframes expand {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

/* Enhanced button glow effect */
.btn-glow {
  position: relative;
  overflow: visible;
}

.btn-glow::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: linear-gradient(45deg, transparent, rgba(59, 130, 246, 0.3), transparent);
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.btn-glow:hover::before {
  opacity: 1;
}

/* Smooth transitions for dark mode */
* {
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

/* Enhanced tooltip styling */
.tooltip {
  animation: tooltip-appear 0.2s ease-out;
}

@keyframes tooltip-appear {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* Floating effect for input container */
.floating-input {
  box-shadow: 
    0 10px 25px -5px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.floating-input:hover {
  box-shadow: 
    0 20px 40px -12px rgba(0, 0, 0, 0.15),
    0 8px 16px -4px rgba(0, 0, 0, 0.1);
}

.floating-input:focus-within {
  box-shadow: 
    0 25px 50px -12px rgba(59, 130, 246, 0.25),
    0 10px 20px -5px rgba(0, 0, 0, 0.1);
}