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

:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --border: #e0e0e0;
  --text: #1a1a1a;
  --text-secondary: #666;
  --primary: #111;
  --primary-hover: #333;
  --danger: #dc3545;
  --success: #28a745;
  --warning: #ffc107;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px;
}

.container-narrow {
  max-width: 400px;
  margin: 80px auto;
  padding: 24px 16px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

header h1 {
  font-size: 18px;
  font-weight: 600;
}

header nav {
  display: flex;
  gap: 16px;
  align-items: center;
}

header nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
}

header nav a:hover {
  color: var(--text);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 4px;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
  transition: border-color 0.15s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-row-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  transition: all 0.15s;
  white-space: nowrap;
}

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

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

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

.btn-danger {
  color: var(--danger);
  border-color: var(--danger);
}

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

.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
}

.btn-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.flash {
  padding: 10px 14px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 13px;
}

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

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

.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th, td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

th a {
  color: inherit;
  text-decoration: none;
}

th a:hover {
  color: var(--text);
}

td {
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 500;
}

.badge-active {
  background: #d4edda;
  color: #155724;
}

.badge-inactive {
  background: #f8d7da;
  color: #721c24;
}

.badge-protected {
  background: #fff3cd;
  color: #856404;
}

.search-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.search-bar input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
}

.search-bar input:focus {
  outline: none;
  border-color: var(--primary);
}

.qr-container {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-top: 16px;
}

.qr-container img {
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.stats-list {
  font-size: 13px;
}

.stats-list .stat-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 100;
  align-items: center;
  justify-content: center;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

.modal h3 {
  margin-bottom: 16px;
  font-size: 16px;
}

.modal textarea {
  width: 100%;
  height: 200px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: monospace;
  font-size: 13px;
  resize: vertical;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 16px;
}

.password-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.password-form {
  text-align: center;
  max-width: 320px;
}

.password-form h2 {
  font-size: 16px;
  margin-bottom: 16px;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.checkbox-group input[type="checkbox"] {
  width: auto;
}

.slug-preview {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

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

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

.section-title {
  font-size: 14px;
  font-weight: 600;
  margin: 24px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.top-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .form-row, .form-row-3 {
    grid-template-columns: 1fr;
  }

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