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

:root {
  --primary-color: #f38020;
  --secondary-color: #0051c3;
  --background: #f5f5f5;
  --surface: #ffffff;
  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --border: #e0e0e0;
  --user-message: #0051c3;
  --assistant-message: #f5f5f5;
  --success: #10b981;
  --error: #ef4444;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
  color: var(--text-primary);
}

.container {
  max-width: 900px;
  margin: 0 auto;
  background: var(--surface);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: calc(100vh - 40px);
}

header {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  padding: 24px;
  text-align: center;
}

header h1 {
  font-size: 28px;
  margin-bottom: 8px;
}

.subtitle {
  font-size: 14px;
  opacity: 0.9;
}

.controls {
  display: flex;
  gap: 12px;
  padding: 16px;
  background: var(--background);
  border-bottom: 1px solid var(--border);
  align-items: center;
  flex-wrap: wrap;
}

.status {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.status-dot.online {
  background: var(--success);
}

.status-dot.offline {
  background: var(--error);
  animation: none;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background: #d66f1a;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(243, 128, 32, 0.3);
}

.btn-secondary {
  background: var(--background);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.search-panel {
  padding: 16px;
  background: var(--background);
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.search-panel.hidden {
  display: none;
}

.search-panel input {
  flex: 1;
  min-width: 200px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}

.search-results {
  width: 100%;
  margin-top: 12px;
  max-height: 200px;
  overflow-y: auto;
}

.search-result-item {
  padding: 12px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 8px;
  font-size: 14px;
}

.search-result-item strong {
  color: var(--primary-color);
}

.chat-container {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  background: white;
}

.messages {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.message {
  max-width: 80%;
  animation: slideIn 0.3s ease;
}

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

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

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

.message-content {
  padding: 14px 18px;
  border-radius: 12px;
  line-height: 1.5;
  word-wrap: break-word;
}

.message.user .message-content {
  background: var(--user-message);
  color: white;
}

.message.assistant .message-content {
  background: var(--assistant-message);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.message-time {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 4px;
  padding: 0 4px;
}

.message.user .message-time {
  text-align: right;
}

.typing-indicator {
  display: flex;
  gap: 4px;
  padding: 14px 18px;
  background: var(--assistant-message);
  border-radius: 12px;
  width: fit-content;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  background: var(--text-secondary);
  border-radius: 50%;
  animation: typing 1.4s infinite;
}

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

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

@keyframes typing {
  0%,
  60%,
  100% {
    transform: translateY(0);
    opacity: 0.7;
  }
  30% {
    transform: translateY(-10px);
    opacity: 1;
  }
}

.input-container {
  padding: 16px;
  background: var(--background);
  border-top: 1px solid var(--border);
  display: flex;
  gap: 12px;
}

#messageInput {
  flex: 1;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  resize: none;
  max-height: 120px;
  transition: border-color 0.3s ease;
}

#messageInput:focus {
  outline: none;
  border-color: var(--primary-color);
}

#sendBtn {
  min-width: 80px;
}

/* Scrollbar styling */
.chat-container::-webkit-scrollbar,
.search-results::-webkit-scrollbar {
  width: 8px;
}

.chat-container::-webkit-scrollbar-track,
.search-results::-webkit-scrollbar-track {
  background: var(--background);
}

.chat-container::-webkit-scrollbar-thumb,
.search-results::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

.chat-container::-webkit-scrollbar-thumb:hover,
.search-results::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Responsive design */
@media (max-width: 768px) {
  .container {
    height: 100vh;
    border-radius: 0;
  }

  body {
    padding: 0;
  }

  .message {
    max-width: 90%;
  }

  .controls {
    flex-direction: column;
    align-items: stretch;
  }

  .status {
    margin-left: 0;
    justify-content: center;
  }
}