:root {
  --primary: #3498db;
  --primary-dark: #2980b9;
  --success: #2ecc71;
  --warning: #f39c12;
  --error: #e74c3c;
  --error-dark: #c0392b;
  --light: #f8f9fa;
  --light-gray: #e9ecef;
  --medium-gray: #ced4da;
  --dark: #343a40;
  --darker: #212529;
  --border-radius: 8px;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition: all 0.2s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  color: var(--darker);
  background-color: #fafafa;
  padding: 16px;
  min-height: 100vh;
}

.container {
  max-width: 900px;
  margin: 0 auto;
}

header {
  margin-bottom: 24px;
}

h1 {
  color: var(--darker);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.status {
  font-size: 0.9rem;
  color: #6c757d;
  margin-top: -6px;
}

main {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.chat-container {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.chat-history {
  padding: 16px;
  min-height: 200px;
  max-height: 400px;
  overflow-y: auto;
  border-bottom: 1px solid var(--light-gray);
}

.message {
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--light-gray);
}

.message:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

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

.user-message .message-content {
  background: #e3f2fd;
  color: var(--darker);
  border-radius: 18px 18px 4px 18px;
  display: inline-block;
  padding: 10px 14px;
  max-width: 85%;
  word-wrap: break-word;
}

.assistant-message .message-content {
  background: white;
  border: 1px solid var(--light-gray);
  border-radius: 18px 18px 18px 4px;
  display: inline-block;
  padding: 10px 14px;
  max-width: 85%;
  word-wrap: break-word;
}

.input-area {
  padding: 16px;
}

textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--medium-gray);
  border-radius: var(--border-radius);
  font-size: 16px;
  resize: vertical;
  min-height: 100px;
  margin-bottom: 12px;
  font-family: inherit;
  transition: var(--transition);
}

textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

button {
  padding: 10px 16px;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.primary:hover:not(:disabled) {
  background: var(--primary-dark);
}

.danger {
  background: var(--error);
  color: white;
}

.danger:hover:not(:disabled) {
  background: var(--error-dark);
}

.secondary {
  background: var(--light-gray);
  color: var(--darker);
}

.secondary:hover:not(:disabled) {
  background: var(--medium-gray);
}

.settings {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
}

.settings label {
  display: flex;
  align-items: center;
  gap: 6px;
}

#maxTokens {
  width: 65px;
  padding: 6px 8px;
  border: 1px solid var(--medium-gray);
  border-radius: 4px;
  font-size: 14px;
}

.info-tooltip {
  cursor: help;
  color: #6c757d;
}

.output {
  background: var(--light);
  border: 1px solid var(--light-gray);
  border-radius: var(--border-radius);
  padding: 16px;
  min-height: 100px;
  font-family: monospace;
  line-height: 1.5;
  white-space: pre-wrap;
  word-wrap: break-word;
  margin-bottom: 16px;
}

.model-info {
  font-size: 0.9rem;
  color: #6c757d;
  padding-top: 8px;
  border-top: 1px solid var(--light-gray);
}

.model-info p {
  margin: 6px 0;
}

.model-info code {
  background: rgba(0, 0, 0, 0.05);
  padding: 2px 4px;
  border-radius: 4px;
  font-family: monospace;
}

.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2.5px solid rgba(0, 0, 0, 0.1);
  border-radius: 50%;
  border-top-color: var(--primary);
  animation: spin 1s ease-in-out infinite;
  margin-right: 8px;
  vertical-align: middle;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

footer {
  text-align: center;
  margin-top: 32px;
  color: #6c757d;
  font-size: 0.9rem;
  padding-top: 16px;
  border-top: 1px solid var(--light-gray);
}

footer a {
  color: var(--primary);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Responsive design */
@media (max-width: 768px) {
  .settings {
    margin-left: 0;
    width: 100%;
    margin-top: 10px;
    justify-content: flex-end;
  }
  
  .controls {
    flex-direction: column;
    align-items: stretch;
  }
  
  button {
    width: 100%;
  }
  
  .chat-history {
    max-height: 300px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 12px;
  }
  
  h1 {
    font-size: 1.5rem;
  }
  
  .message .message-content {
    max-width: 95%;
  }
  
  textarea {
    min-height: 80px;
  }
}