:root {
  --primary-color: #007bff;
  --secondary-color: #6c757d;
  --success-color: #28a745;
  --danger-color: #dc3545;
  --warning-color: #ffc107;
  --info-color: #17a2b8;
  --background-color: #f8f9fa;
  --surface-color: #ffffff;
  --text-color: #212529;
  --border-color: #dee2e6;
}

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

body {
  width: 400px;
  min-height: 500px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  font-size: 14px;
  line-height: 1.5;
}

.container {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

header {
  text-align: center;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border-color);
}

h1 {
  font-size: 20px;
  color: var(--primary-color);
  margin-bottom: 5px;
}

.subtitle {
  color: var(--secondary-color);
  font-size: 14px;
}

main {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

section {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 15px;
}

section h3 {
  font-size: 16px;
  margin-bottom: 15px;
  color: var(--text-color);
}

.control-group {
  margin-bottom: 15px;
}

.control-group:last-child {
  margin-bottom: 0;
}

label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
  color: var(--text-color);
}

input[type="text"] {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 14px;
}

input[type="text"]:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

.btn {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  margin-right: 8px;
  margin-bottom: 8px;
}

.btn:last-child {
  margin-right: 0;
}

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

.btn-primary:hover {
  background-color: #0056b3;
  border-color: #0056b3;
}

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

.btn-secondary:hover {
  background-color: #545b62;
  border-color: #545b62;
}

.btn-tertiary {
  color: var(--text-color);
  background-color: var(--background-color);
  border-color: var(--border-color);
}

.btn-tertiary:hover {
  background-color: #e2e6ea;
  border-color: #dae0e5;
}

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

.btn-info:hover {
  background-color: #138496;
  border-color: #138496;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.results-container {
  min-height: 100px;
  max-height: 300px;
  overflow-y: auto;
}

.placeholder {
  color: var(--secondary-color);
  text-align: center;
  padding: 20px;
}

.message {
  padding: 10px;
  border-radius: 4px;
  margin-bottom: 10px;
}

.message.success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.message.error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.message.info {
  background-color: #d1ecf1;
  color: #0c5460;
  border: 1px solid #bee5eb;
}

.page-info {
  font-size: 14px;
}

.page-info h4 {
  margin-bottom: 10px;
  color: var(--primary-color);
}

.page-info p {
  margin-bottom: 8px;
}

.page-info strong {
  color: var(--text-color);
}

.links-list {
  list-style: none;
}

.links-list li {
  padding: 8px;
  border-bottom: 1px solid var(--border-color);
}

.links-list li:last-child {
  border-bottom: none;
}

.link-url {
  color: var(--primary-color);
  text-decoration: none;
  word-break: break-all;
}

.link-url:hover {
  text-decoration: underline;
}

.external {
  background-color: var(--warning-color);
  color: #212529;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 12px;
  margin-left: 5px;
}

.no-results {
  color: var(--secondary-color);
  text-align: center;
  padding: 20px;
}

.more-results {
  color: var(--secondary-color);
  font-style: italic;
  text-align: center;
  padding: 10px;
}

footer {
  text-align: center;
  padding-top: 15px;
  border-top: 1px solid var(--border-color);
}

.shortcuts small {
  color: var(--secondary-color);
  font-size: 12px;
}

/* 滚动条样式 */
.results-container::-webkit-scrollbar {
  width: 6px;
}

.results-container::-webkit-scrollbar-track {
  background: var(--background-color);
}

.results-container::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

.results-container::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-color);
}