:root {
  --primary: #4285f4;
  --primary-dark: #3367d6;
  --success: #0f9d58;
  --success-dark: #0b8043;
  --bg: #f8f9fa;
  --card: #ffffff;
  --text: #202124;
  --text-secondary: #5f6368;
  --border: #dadce0;
}

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

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}

header {
  text-align: center;
  padding: 40px 0;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.card {
  background: var(--card);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.card h2 {
  font-size: 1.3rem;
  margin-bottom: 16px;
  color: var(--text);
}

.input-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

input[type="text"], textarea {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  min-width: 200px;
}

textarea {
  width: 100%;
  resize: vertical;
  font-family: monospace;
  margin-bottom: 12px;
}

button {
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-success {
  background: var(--success);
  color: white;
  margin-top: 12px;
}

.btn-success:hover {
  background: var(--success-dark);
}

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

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

.results {
  margin-top: 20px;
  padding: 16px;
  background: var(--bg);
  border-radius: 8px;
}

.results.hidden {
  display: none;
}

#urlList {
  list-style: none;
  max-height: 300px;
  overflow-y: auto;
  margin: 12px 0;
}

#urlList li {
  padding: 8px 12px;
  background: white;
  margin-bottom: 8px;
  border-radius: 6px;
  border-left: 4px solid var(--primary);
  font-family: monospace;
  font-size: 0.9rem;
  word-break: break-all;
}

.status-item {
  padding: 12px;
  background: white;
  border-radius: 6px;
  margin-bottom: 8px;
}

.status-success { border-left: 4px solid var(--success); }
.status-error { border-left: 4px solid #ea4335; }
.status-pending { border-left: 4px solid var(--primary); }

.loading {
  opacity: 0.7;
  pointer-events: none;
}

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 8px;
}

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

footer {
  text-align: center;
  padding: 40px 0;
  color: var(--text-secondary);
}

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

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