:root {
  --bg: #0f1117;
  --bg-secondary: #1a1b26;
  --bg-card: #1e1f2e;
  --bg-hover: #252636;
  --border: #2a2b3d;
  --text: #e1e2e8;
  --text-secondary: #8b8d9e;
  --text-muted: #565770;
  --accent: #6c5ce7;
  --accent-light: #a29bfe;
  --accent-bg: rgba(108, 92, 231, 0.1);
  --danger: #e74c3c;
  --danger-bg: rgba(231, 76, 60, 0.1);
  --success: #2ecc71;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --transition: 0.2s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  gap: 20px;
  flex-wrap: wrap;
}

.header-left {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.logo {
  font-size: 22px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: 13px;
  color: var(--text-muted);
}

.header-center {
  flex: 1;
  max-width: 480px;
  min-width: 200px;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 12px;
  color: var(--text-muted);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  padding: 10px 40px 10px 38px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition);
}

.search-box input:focus {
  border-color: var(--accent);
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.search-hint {
  position: absolute;
  right: 10px;
  background: var(--bg-hover);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 11px;
  color: var(--text-muted);
  font-family: inherit;
  transition: opacity var(--transition);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

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

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

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

.category-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 0 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.category-list {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  flex: 1;
}

.category-list::-webkit-scrollbar {
  display: none;
}

.category-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
  user-select: none;
}

.category-tag:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.category-tag.active {
  background: var(--accent-bg);
  border-color: var(--accent);
  color: var(--accent-light);
}

.category-tag .cat-icon {
  font-size: 14px;
}

.category-tag .cat-edit {
  display: none;
  margin-left: 2px;
  opacity: 0.5;
  cursor: pointer;
}

.category-tag:hover .cat-edit {
  display: inline;
}

.category-tag .cat-edit:hover {
  opacity: 1;
}

.category-add {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px dashed var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}

.category-add:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-bg);
}

.content {
  padding-bottom: 60px;
}

.bookmark-section {
  margin-bottom: 32px;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding-bottom: 8px;
}

.section-icon {
  font-size: 18px;
}

.section-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.section-count {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 2px 8px;
  border-radius: 10px;
}

.bookmark-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

.bookmark-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  color: inherit;
  position: relative;
}

.bookmark-card:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.bookmark-card .favicon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 600;
  color: var(--accent-light);
  flex-shrink: 0;
  overflow: hidden;
}

.bookmark-card .favicon img {
  width: 20px;
  height: 20px;
  object-fit: contain;
}

.bookmark-card .info {
  flex: 1;
  min-width: 0;
}

.bookmark-card .bm-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bookmark-card .bm-desc {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

.bookmark-card .bm-url {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 3px;
  opacity: 0.7;
}

.bookmark-card .card-menu {
  position: absolute;
  top: 8px;
  right: 8px;
  opacity: 0;
  padding: 4px;
  border-radius: 4px;
  background: var(--bg-hover);
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1;
}

.bookmark-card:hover .card-menu {
  opacity: 1;
}

.bookmark-card .card-menu:hover {
  color: var(--text);
  background: var(--bg-secondary);
}

.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-muted);
}

.empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.empty-state p {
  font-size: 13px;
  max-width: 300px;
  margin: 0 auto;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  width: 90%;
  max-width: 460px;
  box-shadow: var(--shadow);
  transform: translateY(20px);
  transition: transform var(--transition);
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-sm {
  max-width: 360px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-header h2 {
  font-size: 17px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 22px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
  transition: color var(--transition);
}

.modal-close:hover {
  color: var(--text);
}

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

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition);
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--accent);
}

.form-group input::placeholder {
  color: var(--text-muted);
}

.form-group select option {
  background: var(--bg-card);
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

.ie-content {
  padding: 8px 0;
}

.ie-section {
  padding: 16px 0;
}

.ie-section h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}

.ie-section p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.ie-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

.ie-file-label {
  cursor: pointer;
}

.context-menu {
  position: fixed;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px;
  min-width: 160px;
  box-shadow: var(--shadow);
  z-index: 200;
  display: none;
}

.context-menu.visible {
  display: block;
}

.context-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 4px;
  transition: all var(--transition);
}

.context-item:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.context-item.danger:hover {
  background: var(--danger-bg);
  color: var(--danger);
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 20px;
  font-size: 13px;
  color: var(--text);
  box-shadow: var(--shadow);
  z-index: 300;
  transition: transform 0.3s ease;
  pointer-events: none;
}

.toast.visible {
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 640px) {
  .app {
    padding: 0 16px;
  }

  .header {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .header-left {
    justify-content: space-between;
  }

  .header-center {
    max-width: none;
  }

  .header-right {
    justify-content: flex-end;
  }

  .bookmark-grid {
    grid-template-columns: 1fr;
  }
}