* {
  box-sizing: border-box;
}

:root {
  --bg-body: #1a1a2e;
  --bg-card: #16213e;
  --bg-card-header: #1a2540;
  --bg-card-header-hover: #1f2b47;
  --bg-input: #0f0f23;
  --bg-item-hover: #1f2b47;
  --bg-icon-hover: #2a3856;
  --bg-code: #0f0f23;
  --bg-btn-secondary: #555;
  --bg-status-error: #3d1f1f;
  --bg-status-success: #1f3d1f;
  --bg-status-info: #1f2d3d;
  --bg-modal-overlay: rgba(0, 0, 0, 0.7);

  --text-body: #eee;
  --text-link: #fff;
  --text-accent: #4cc9f0;
  --text-muted: #898989;
  --text-label: #aaa;
  --text-light: #ddd;
  --text-status-error: #ff6b6b;
  --text-status-success: #6bff6b;
  --text-status-info: #6bb3ff;
  --text-danger: #e63946;

  --border-color: #333;

  --btn-primary-bg: #4cc9f0;
  --btn-primary-text: #000;
  --btn-danger-bg: #e63946;
  --btn-danger-text: #fff;
  --btn-secondary-text: #fff;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-body: #f5f5f7;
    --bg-card: #fff;
    --bg-card-header: #f0f0f2;
    --bg-card-header-hover: #e5e5e7;
    --bg-input: #fff;
    --bg-item-hover: #f0f0f2;
    --bg-icon-hover: #e0e0e2;
    --bg-code: #f0f0f2;
    --bg-btn-secondary: #6c757d;
    --bg-status-error: #fce4e4;
    --bg-status-success: #e4fce4;
    --bg-status-info: #e4f0fc;
    --bg-modal-overlay: rgba(0, 0, 0, 0.5);

    --text-body: #222;
    --text-link: #0066cc;
    --text-accent: #0077b6;
    --text-muted: #666;
    --text-label: #555;
    --text-light: #333;
    --text-status-error: #c62828;
    --text-status-success: #2e7d32;
    --text-status-info: #1565c0;
    --text-danger: #c62828;

    --border-color: #ddd;

    --btn-primary-bg: #0077b6;
    --btn-primary-text: #fff;
    --btn-danger-bg: #c62828;
    --btn-danger-text: #fff;
    --btn-secondary-text: #fff;
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px 8px;
  background: var(--bg-body);
  color: var(--text-body);
}

a {
  color: var(--text-link);
}

h1 {
  color: var(--text-accent);
  margin-bottom: 20px;
}
.config {
  background: var(--bg-card);
  border-radius: 8px;
  margin-bottom: 20px;
  overflow: hidden;
}
.config-header {
  padding: 15px 20px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-card-header);
  user-select: none;
}
.config-header:hover {
  background: var(--bg-card-header-hover);
}
.config-header span:first-child {
  font-weight: 500;
  color: var(--text-accent);
}
#configToggle {
  transition: transform 0.2s;
}
.config-content {
  padding: 20px;
  transition: max-height 0.3s ease-out;
}
.config-content.collapsed {
  max-height: 0;
  padding: 0 20px;
  overflow: hidden;
}
.config label {
  display: block;
  margin-bottom: 5px;
  color: var(--text-label);
}
.config input[type='text'],
.config input[type='password'] {
  width: 100%;
  padding: 10px;
  margin-bottom: 15px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--bg-input);
  color: var(--text-body);
}
.checkbox-group {
  margin-bottom: 15px;
}
.checkbox-group label {
  display: flex;
  align-items: center;
  cursor: pointer;
  color: var(--text-body);
}
.checkbox-group input[type='checkbox'] {
  width: 18px;
  height: 18px;
  margin-right: 10px;
  cursor: pointer;
}
.proxy-url-group {
  margin-bottom: 15px;
  margin-left: 28px;
}
button {
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
}
.btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
}
.btn-danger {
  background: var(--btn-danger-bg);
  color: var(--btn-danger-text);
}
.btn-secondary {
  background: var(--bg-btn-secondary);
  color: var(--btn-secondary-text);
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.album-count-info {
  margin-bottom: 10px;
  color: var(--text-muted);
  font-size: 1rem;
}
.sticky-controls {
  position: sticky;
  top: 0;
  background: var(--bg-body);
  padding: 10px 0;
  z-index: 10;
  margin-bottom: 15px;
}
.toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
  align-items: center;
}
.toolbar input[type='text'] {
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--bg-input);
  color: var(--text-body);
  flex: 1;
  min-width: 200px;
}
.action-buttons {
  display: flex;
  gap: 10px;
}
.album-list {
  background: var(--bg-card);
  border-radius: 8px;
  overflow: hidden;
}
.album-item {
  display: flex;
  align-items: center;
  padding: 12px 15px;
  border-bottom: 1px solid var(--border-color);
  gap: 12px;
}
.album-item:last-child {
  border-bottom: none;
}
.album-item:hover {
  background: var(--bg-item-hover);
}
.album-item input[type='checkbox'] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}
.album-name {
  flex: 1;
}
.album-count {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.album-actions {
  display: flex;
  gap: 6px;
  opacity: 0;
  transition: opacity 0.2s;
}
.album-item:hover .album-actions {
  opacity: 1;
}
.btn-icon {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 8px;
  font-size: 1rem;
  border-radius: 4px;
  transition: background 0.2s;
  line-height: 1;
}
.btn-icon:hover {
  background: var(--bg-icon-hover);
}
.status {
  padding: 10px;
  border-radius: 4px;
  margin-bottom: 15px;
}
.status.error {
  background: var(--bg-status-error);
  color: var(--text-status-error);
}
.status.success {
  background: var(--bg-status-success);
  color: var(--text-status-success);
}
.status.info {
  background: var(--bg-status-info);
  color: var(--text-status-info);
}
.hidden {
  display: none !important;
}
.select-info {
  color: var(--text-muted);
  font-size: 1rem;
}
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-modal-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  overflow-y: auto;
  padding: 20px;
}
.modal-overlay.hidden {
  display: none;
}
.modal {
  background: var(--bg-card);
  padding: 25px;
  border-radius: 8px;
  max-width: 500px;
  width: 90%;
}
.modal h2 {
  margin-top: 0;
  color: var(--text-danger);
}
.modal ul {
  max-height: 200px;
  overflow-y: auto;
  margin: 15px 0;
  padding-left: 20px;
}
.merge-album-name {
  cursor: pointer;
  text-decoration: none;
}
.merge-album-name:hover {
  text-decoration: underline;
}
.modal-buttons {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}
.merge-input-group {
  margin: 20px 0;
}
.merge-input-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-label);
  font-size: 1rem;
}
.merge-input-group input {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--bg-input);
  color: var(--text-body);
  font-size: 1rem;
  margin-bottom: 10px;
}
.merge-hint {
  font-size: 1rem;
  color: var(--text-muted);
  margin: 0;
}

label {
  cursor: pointer;
}

.usage-section {
  margin-top: 20px;
  padding-top: 15px;
  border-top: 1px solid var(--border-color);
  color: var(--text-light);
}
.usage-section h3 {
  color: var(--text-accent);
  font-size: 1rem;
  margin: 0 0 10px 0;
}
.usage-section ul {
  margin: 10px 0 0 0;
  padding-left: 20px;
}
.usage-section li {
  margin-bottom: 8px;
  line-height: 1.5;
}
.usage-section ul ul {
  margin-top: 5px;
}
.usage-section code {
  background: var(--bg-code);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--text-accent);
  font-family: monospace;
}