* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: linear-gradient(145deg, #1e293b 0%, #0f172a 100%);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.chat-container {
  width: 100%;
  max-width: 800px;
  height: 90vh;
  background: rgba(30, 41, 59, 0.7);
  backdrop-filter: blur(10px);
  border-radius: 32px;
  box-shadow: 0 25px 45px -12px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
}

.chat-header {
  padding: 20px 24px;
  background: rgba(15, 23, 42, 0.8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.chat-header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  background: linear-gradient(135deg, #ffffff, #94a3b8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.3px;
}

.chat-header p {
  font-size: 0.8rem;
  color: #94a3b8;
  margin-top: 4px;
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scroll-behavior: smooth;
}

.messages::-webkit-scrollbar {
  width: 6px;
}

.messages::-webkit-scrollbar-track {
  background: rgba(0,0,0,0.2);
  border-radius: 10px;
}

.messages::-webkit-scrollbar-thumb {
  background: #475569;
  border-radius: 10px;
}

.message {
  max-width: 80%;
  display: flex;
  animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.user-message {
  align-self: flex-end;
}

.bot-message {
  align-self: flex-start;
}

.bubble {
  padding: 12px 18px;
  border-radius: 24px;
  font-size: 0.95rem;
  line-height: 1.4;
  word-wrap: break-word;
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.user-message .bubble {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: white;
  border-bottom-right-radius: 6px;
}

.bot-message .bubble {
  background: rgba(51, 65, 85, 0.9);
  backdrop-filter: blur(4px);
  color: #e2e8f0;
  border-bottom-left-radius: 6px;
  border: 1px solid rgba(255,255,255,0.1);
}

.input-area {
  padding: 20px 24px;
  background: rgba(15, 23, 42, 0.8);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  gap: 12px;
  align-items: center;
}

.input-area input {
  flex: 1;
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 48px;
  padding: 12px 20px;
  font-size: 1rem;
  color: #f1f5f9;
  outline: none;
  transition: all 0.2s ease;
}

.input-area input:focus {
  border-color: #3b82f6;
  box-shadow: 0 0 0 2px rgba(59,130,246,0.2);
}

.input-area input::placeholder {
  color: #64748b;
}

.input-area button {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  border: none;
  border-radius: 48px;
  padding: 12px 24px;
  font-weight: 600;
  color: white;
  cursor: pointer;
  transition: transform 0.1s ease, background 0.2s;
  font-size: 0.9rem;
}

.input-area button:hover {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  transform: scale(0.98);
}

.input-area button:active {
  transform: scale(0.96);
}

.typing-indicator {
  display: flex;
  gap: 4px;
  padding: 8px 16px;
  background: rgba(51, 65, 85, 0.9);
  border-radius: 24px;
  width: fit-content;
  align-items: center;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  background: #94a3b8;
  border-radius: 50%;
  display: inline-block;
  animation: pulse 1.2s infinite ease-in-out;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes pulse {
  0%, 60%, 100% { transform: scale(0.8); opacity: 0.5; }
  30% { transform: scale(1.2); opacity: 1; }
}

@media (max-width: 600px) {
  body { padding: 12px; }
  .chat-container { height: 95vh; border-radius: 24px; }
  .messages { padding: 16px; }
  .message { max-width: 90%; }
  .input-area { padding: 12px 16px; }
}