:root {
  --bg: #f3f6fb;
  --bg-soft: #eef3fb;
  --panel: rgba(255,255,255,0.96);
  --panel-2: #f8fbff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --primary: #2563eb;
  --primary-2: #3b82f6;
  --primary-light: #dbeafe;
  --danger: #dc2626;
  --warning: #f59e0b;
  --success: #16a34a;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-hover: 0 14px 35px rgba(37, 99, 235, 0.12);

  --bookmark-font-size: 16px;
  --bookmark-font-color: #1f2937;
  --category-font-size: 16px;
  --category-font-color: #111827;
  --category-item-spacing: 10px;
  --card-bg-color: #ffffff;
  --card-width: 220px;
  --card-height: 94px;
}

body.dark {
  --bg: #0b1220;
  --bg-soft: #111b31;
  --panel: rgba(17,24,39,0.96);
  --panel-2: #162033;
  --text: #f3f4f6;
  --muted: #9ca3af;
  --line: #2f3b52;
  --primary: #60a5fa;
  --primary-2: #93c5fd;
  --primary-light: rgba(59,130,246,0.22);
  --danger: #ef4444;
  --warning: #fbbf24;
  --success: #22c55e;
  --shadow: 0 12px 36px rgba(0,0,0,0.32);
  --shadow-hover: 0 14px 38px rgba(59,130,246,0.24);
  --category-font-color: #ffffff;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(59,130,246,0.08), transparent 26%),
    radial-gradient(circle at bottom right, rgba(59,130,246,0.07), transparent 20%),
    var(--bg);
  color: var(--text);
}

body.dark {
  background:
    radial-gradient(circle at top left, rgba(96,165,250,0.10), transparent 24%),
    radial-gradient(circle at bottom right, rgba(59,130,246,0.08), transparent 20%),
    var(--bg);
}

.app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.sidebar {
  width: 320px;
  background: var(--panel);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  backdrop-filter: blur(10px);
}

body.dark .sidebar {
  background: rgba(11,18,32,0.95);
}

.logo {
  padding: 20px 20px 16px;
  font-size: 30px;
  font-weight: 800;
  color: var(--primary);
  border-bottom: 1px solid var(--line);
  letter-spacing: 1px;
}

.sidebar-top {
  padding: 14px;
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  background: linear-gradient(180deg, rgba(37,99,235,0.03), transparent);
}

body.dark .sidebar-top {
  background: linear-gradient(180deg, rgba(96,165,250,0.08), transparent);
}

.menu {
  flex: 1;
  overflow-y: auto;
  padding: 14px;
}

.menu-title {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 12px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  letter-spacing: .5px;
  gap: 12px;
  flex-wrap: wrap;
}

.menu-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 12px;
  border-radius: 14px;
  cursor: pointer;
  margin-bottom: var(--category-item-spacing);
  transition: 0.22s ease;
  border: 1px solid transparent;
  background: transparent;
  position: relative;
}

.menu-item:hover {
  background: var(--panel-2);
  transform: translateX(2px);
}

body.dark .menu-item:hover {
  background: rgba(255,255,255,0.04);
}

.menu-item.active {
  background: linear-gradient(90deg, var(--primary-light), transparent);
  border-color: rgba(37,99,235,0.25);
  box-shadow: inset 4px 0 0 var(--primary);
}

body.dark .menu-item.active {
  background: linear-gradient(90deg, rgba(96,165,250,0.16), rgba(255,255,255,0.02));
  border-color: rgba(96,165,250,0.20);
}

.menu-item.drag-over {
  outline: 2px dashed var(--primary);
  background: var(--panel-2);
}

.menu-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex: 1;
  pointer-events: none;
}

.menu-left .menu-checkbox {
  pointer-events: auto;
}

.menu-drag {
  color: var(--muted);
  font-size: 12px;
  flex-shrink: 0;
  width: 16px;
  text-align: center;
}

.menu-checkbox {
  margin-right: 2px;
  flex-shrink: 0;
  accent-color: var(--primary);
}

.menu-name {
  min-width: 0;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: var(--category-font-size);
  color: var(--category-font-color);
  font-weight: 700;
  transition: .2s;
}

.menu-item.active .menu-name {
  color: var(--primary-2);
}

body.dark .menu-item.active .menu-name {
  color: #ffffff;
}

.menu-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  pointer-events: none;
}

.count {
  min-width: 24px;
  height: 24px;
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  padding: 0 8px;
  border: 1px solid rgba(37,99,235,0.12);
  font-weight: 700;
}

body.dark .count {
  background: rgba(255,255,255,0.03);
  color: #93c5fd;
  border: 1px solid rgba(147,197,253,0.18);
}

.sidebar-footer {
  padding: 14px;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  background: linear-gradient(0deg, rgba(37,99,235,0.03), transparent);
}

body.dark .sidebar-footer {
  background: linear-gradient(0deg, rgba(96,165,250,0.06), transparent);
}

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

.header {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  backdrop-filter: blur(10px);
}

body.dark .header {
  background: rgba(11,18,32,0.88);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1;
  min-width: 280px;
}

.title {
  font-size: 24px;
  font-weight: 800;
  white-space: nowrap;
  letter-spacing: 0.5px;
}

.search-box {
  flex: 1;
  max-width: 560px;
  min-width: 220px;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 13px 16px 13px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: .2s;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.2);
}

.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37,99,235,0.12);
  background: var(--panel);
}

body.dark .search-box input {
  background: rgba(255,255,255,0.03);
  box-shadow: none;
}

body.dark .search-box input::placeholder {
  color: rgba(255,255,255,0.42);
}

.header-right {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.content {
  flex: 1;
  overflow: auto;
  padding: 22px;
}

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.toolbar-left,
.toolbar-right {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
}

.section-count {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: white;
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 700;
  box-shadow: 0 6px 14px rgba(37,99,235,0.22);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--card-width), 1fr));
  gap: 16px;
  align-items: stretch;
}

.site-card {
  position: relative;
  background: var(--card-bg-color);
  border: 1px solid rgba(148,163,184,0.15);
  border-radius: 18px;
  min-height: var(--card-height);
  box-shadow: var(--shadow);
  transition: 0.22s ease;
  overflow: hidden;
  cursor: grab;
  backdrop-filter: blur(8px);
}

body.dark .site-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01)), var(--card-bg-color);
  border: 1px solid rgba(255,255,255,0.08);
}

.site-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(37,99,235,0.03), transparent 40%);
  pointer-events: none;
}

body.dark .site-card::after {
  background: linear-gradient(135deg, rgba(96,165,250,0.05), transparent 40%);
}

.site-card:hover {
  transform: translateY(-3px);
  border-color: rgba(37,99,235,0.32);
  box-shadow: var(--shadow-hover);
}

.site-card.drag-over {
  outline: 2px dashed var(--primary);
  outline-offset: 2px;
}

.site-card.selected {
  box-shadow: 0 0 0 2px var(--primary) inset, var(--shadow);
  border-color: rgba(37,99,235,0.35);
}

.card-select {
  position: absolute;
  left: 12px;
  top: 12px;
  z-index: 3;
  accent-color: var(--primary);
}

.card-top-badge {
  position: absolute;
  right: 44px;
  top: 10px;
  z-index: 3;
  font-size: 12px;
  cursor: pointer;
  user-select: none;
  opacity: 0.92;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 9px;
  font-weight: 700;
  transition: .2s;
}

body.dark .card-top-badge {
  background: rgba(17,24,39,0.92);
  color: #e5e7eb;
}

.card-top-badge:hover {
  transform: translateY(-1px);
}

.card-top-badge.active {
  color: #fff;
  background: linear-gradient(135deg, #f59e0b, #fbbf24);
  border-color: #f59e0b;
  box-shadow: 0 8px 18px rgba(245,158,11,0.25);
}

.card-edit {
  position: absolute;
  right: 10px;
  top: 10px;
  z-index: 3;
  width: 28px;
  height: 28px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 13px;
  transition: .2s;
}

body.dark .card-edit {
  background: rgba(17,24,39,0.95);
  color: #f3f4f6;
}

.card-edit:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.site-card:hover .card-edit {
  display: flex;
}

.site-card-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: var(--card-height);
  padding: 24px 50px 20px 38px;
  user-select: none;
  position: relative;
  z-index: 1;
  cursor: pointer;
}

.site-name {
  font-size: var(--bookmark-font-size);
  color: var(--bookmark-font-color);
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
  word-break: break-all;
  letter-spacing: .3px;
}

body.dark .site-name {
  color: #f3f4f6;
}

.btn,
.icon-btn,
.select-lite {
  border: none;
  border-radius: 12px;
  padding: 10px 14px;
  cursor: pointer;
  font-size: 14px;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--line);
  transition: .18s;
}

.select-lite {
  outline: none;
}

.btn:hover,
.icon-btn:hover,
.select-lite:hover {
  background: var(--panel-2);
  transform: translateY(-1px);
}

body.dark .btn,
body.dark .icon-btn,
body.dark .select-lite {
  background: rgba(255,255,255,0.03);
  color: #f3f4f6;
  border-color: rgba(255,255,255,0.10);
}

body.dark .btn:hover,
body.dark .icon-btn:hover,
body.dark .select-lite:hover {
  background: rgba(255,255,255,0.06);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: white;
  border-color: transparent;
  box-shadow: 0 8px 18px rgba(37,99,235,0.2);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger), #ef4444);
  color: white;
  border-color: transparent;
}

.btn-success {
  background: linear-gradient(135deg, var(--success), #22c55e);
  color: white;
  border-color: transparent;
}

.empty {
  background: linear-gradient(180deg, rgba(255,255,255,0.6), transparent), var(--panel);
  border: 1px dashed rgba(148,163,184,0.35);
  padding: 80px 20px;
  text-align: center;
  color: var(--muted);
  border-radius: 20px;
  box-shadow: var(--shadow);
  font-size: 15px;
}

body.dark .empty {
  background: linear-gradient(180deg, rgba(255,255,255,0.04), transparent), rgba(17,24,39,0.92);
  border: 1px dashed rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.72);
}

.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-hover);
  border-radius: 14px;
  padding: 12px 16px;
  z-index: 1200;
  display: none;
  min-width: 220px;
  backdrop-filter: blur(8px);
}

body.dark .toast {
  background: rgba(17,24,39,0.96);
  color: #f3f4f6;
  border-color: rgba(255,255,255,0.08);
}

.toast.show {
  display: block;
  animation: toastIn .18s ease;
}

@keyframes toastIn {
  from {
    transform: translateY(-8px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 20px;
  backdrop-filter: blur(6px);
}

.modal-mask.show {
  display: flex;
}

.modal {
  width: 100%;
  max-width: 760px;
  background: var(--panel);
  color: var(--text);
  border-radius: 22px;
  padding: 22px;
  box-shadow: 0 22px 68px rgba(0, 0, 0, 0.28);
  border: 1px solid var(--line);
  max-height: 90vh;
  overflow: auto;
}

body.dark .modal {
  background: rgba(17,24,39,0.98);
  border-color: rgba(255,255,255,0.08);
}

.modal h2 {
  margin-top: 0;
  margin-bottom: 18px;
  font-size: 24px;
  font-weight: 800;
}

.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 13px;
  font-size: 14px;
  outline: none;
  background: var(--panel-2);
  color: var(--text);
  transition: .2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37,99,235,0.12);
  background: var(--panel);
}

body.dark .form-group input,
body.dark .form-group select,
body.dark .form-group textarea {
  background: rgba(255,255,255,0.03);
  border-color: rgba(255,255,255,0.10);
  color: #f3f4f6;
}

body.dark .form-group input::placeholder,
body.dark .form-group textarea::placeholder {
  color: rgba(255,255,255,0.42);
}

.form-group textarea {
  min-height: 88px;
  resize: vertical;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.muted {
  font-size: 12px;
  color: var(--muted);
  margin-top: 6px;
  line-height: 1.5;
}

.hidden-file {
  display: none;
}

.context-menu {
  position: fixed;
  z-index: 2000;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.18);
  min-width: 170px;
  display: none;
  overflow: hidden;
  backdrop-filter: blur(10px);
  padding: 6px;
}

body.dark .context-menu {
  background: rgba(17,24,39,0.98);
  border-color: rgba(255,255,255,0.08);
}

.context-item {
  padding: 10px 12px;
  cursor: pointer;
  font-size: 14px;
  border-radius: 10px;
  transition: .15s;
}

.context-item:hover {
  background: var(--panel-2);
}

body.dark .context-item:hover {
  background: rgba(255,255,255,0.05);
}

.context-item.danger:hover {
  background: rgba(220,38,38,0.1);
  color: var(--danger);
}

.stats-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.stat-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.82), transparent), var(--panel);
  border: 1px solid rgba(148,163,184,0.15);
  border-radius: 18px;
  min-height: 100px;
  box-shadow: var(--shadow);
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.stat-label {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 8px;
  font-weight: 700;
}

.stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
}

/* 黑夜模式统计卡片优化 */
body.dark .stat-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02)), #111827;
  border: 1px solid rgba(255,255,255,0.10);
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
}

body.dark .stat-label {
  color: rgba(255,255,255,0.80);
}

body.dark .stat-value {
  color: #ffffff;
}

.portal {
  min-height: 100vh;
  padding: 40px;
  background:
    radial-gradient(circle at top left, rgba(96,165,250,0.22), transparent 26%),
    radial-gradient(circle at bottom right, rgba(59,130,246,0.18), transparent 22%),
    linear-gradient(135deg, #081124, #102c6c 60%, #123a8b);
  color: #fff;
}

.portal-shell {
  max-width: 1200px;
  margin: 0 auto;
}

.portal-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 52px;
}

.portal-logo {
  font-size: 34px;
  font-weight: 900;
  letter-spacing: 1px;
}

.portal-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.portal-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 30px;
  align-items: center;
}

.portal-title {
  font-size: 50px;
  font-weight: 900;
  line-height: 1.18;
  margin-bottom: 20px;
}

.portal-desc {
  font-size: 18px;
  line-height: 1.9;
  color: rgba(255,255,255,.85);
  margin-bottom: 28px;
}

.portal-card {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 24px;
  padding: 26px;
  box-shadow: 0 18px 42px rgba(0,0,0,.18);
  backdrop-filter: blur(12px);
}

.portal-card h3 {
  margin-top: 0;
  margin-bottom: 16px;
  font-size: 22px;
  font-weight: 800;
}

.portal-list {
  display: grid;
  gap: 12px;
  color: rgba(255,255,255,.92);
  line-height: 1.8;
  font-size: 15px;
}

@media (max-width: 900px) {
  .sidebar {
    width: 270px;
  }

  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  }

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

  .portal-title {
    font-size: 38px;
  }
}

@media (max-width: 700px) {
  .app {
    flex-direction: column;
    height: auto;
    min-height: 100vh;
  }

  .sidebar {
    width: 100%;
    height: auto;
  }

  .menu {
    max-height: 240px;
  }

  .header {
    padding: 14px 16px;
  }

  .header-left {
    flex-direction: column;
    align-items: stretch;
    min-width: 100%;
  }

  .header-right {
    width: 100%;
    justify-content: flex-start;
  }

  .title {
    font-size: 22px;
  }

  .search-box {
    max-width: 100%;
    min-width: 100%;
  }

  .content {
    padding: 16px;
  }

  .toolbar {
    align-items: stretch;
  }

  .toolbar-left,
  .toolbar-right {
    width: 100%;
  }

  .toolbar-right {
    gap: 8px;
  }

  .toolbar-right .btn,
  .toolbar-right .select-lite {
    flex: 1 1 calc(50% - 8px);
    min-width: 120px;
  }

  .stats-panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
  }

  .site-card-inner {
    padding: 24px 40px 18px 34px;
  }

  .portal {
    padding: 22px;
  }

  .portal-title {
    font-size: 32px;
  }

  .portal-desc {
    font-size: 16px;
    line-height: 1.8;
  }

  .modal {
    padding: 18px;
    border-radius: 18px;
  }
}

@media (max-width: 480px) {
  .logo {
    font-size: 24px;
    padding: 16px;
  }

  .sidebar-top,
  .sidebar-footer,
  .menu {
    padding: 12px;
  }

  .menu-title {
    gap: 8px;
  }

  .title {
    font-size: 20px;
  }

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

  .toolbar-right .btn,
  .toolbar-right .select-lite,
  .sidebar-top .btn,
  .sidebar-footer .btn {
    flex: 1 1 100%;
    width: 100%;
  }

  .stats-panel {
    grid-template-columns: 1fr;
  }

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

  .site-card {
    min-height: 88px;
  }

  .site-card-inner {
    padding: 22px 42px 18px 34px;
  }

  .site-name {
    font-size: calc(var(--bookmark-font-size) - 1px);
  }

  .modal {
    padding: 16px;
    max-height: 92vh;
  }

  .modal h2 {
    font-size: 20px;
  }

  .portal-title {
    font-size: 28px;
  }

  .portal-logo {
    font-size: 28px;
  }

  .portal-actions {
    width: 100%;
  }

  .portal-actions .btn {
    flex: 1 1 100%;
  }

  .toast {
    right: 12px;
    left: 12px;
    min-width: auto;
  }
}