style.css

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

:root {
  --primary-color: #3b82f6;
  --secondary-color: #60a5fa;
  --dark-color: #1e293b;
  --light-color: #f8fafc;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body {
  background-color: #f1f5f9;
}

.message {
  max-width: 80%;
  padding: 12px 16px;
  border-radius: 18px;
  animation: fadeIn 0.3s ease-in-out;
}

.message.user {
  background-color: var(--primary-color);
  color: white;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

.message.bot {
  background-color: #e2e8f0;
  color: var(--dark-color);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.message.system {
  background-color: #fef3c7;
  color: #92400e;
  align-self: center;
  text-align: center;
  max-width: 90%;
  font-size: 0.85rem;
}

.message-content {
  white-space: pre-wrap;
  word-break: break-word;
}

.message-time {
  font-size: 0.7rem;
  opacity: 0.8;
  margin-top: 4px;
  text-align: right;
}

.attachment-preview {
  display: flex;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.7);
  border-radius: 8px;
  padding: 8px 12px;
  margin-top: 8px;
  border: 1px solid #cbd5e1;
}

.attachment-icon {
  margin-right: 8px;
  color: var(--primary-color);
}

.audio-player {
  display: flex;
  align-items: center;
  background-color: #e0f2fe;
  border-radius: 8px;
  padding: 8px 12px;
  margin-top: 8px;
}

.audio-player button {
  background: none;
  border: none;
  cursor: pointer;
  margin-right: 10px;
}

.audio-player progress {
  flex-grow: 1;
  height: 5px;
}

.typing-indicator {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  background-color: #e2e8f0;
  border-radius: 18px;
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.typing-dot {
  width: 8px;
  height: 8px;
  background-color: #94a3b8;
  border-radius: 50%;
  margin: 0 2px;
  animation: typing 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) { animation-delay: 0s; }
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-5px); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .message {
    max-width: 90%;
  }
  
  main {
    padding: 1rem;
  }
}