:root {
  --bg-0: #fafafa;
  --bg-1: #ffffff;
  --bg-2: #fafafa;
  --bg-3: #ececec;
  --bg-4: #ececec;
  --border: #e7e7e7;
  --border-strong: #d4d4d4;
  --border-accent: rgba(10, 10, 10, .35);
  --text-1: #0a0a0a;
  --text-2: #525252;
  --text-3: #737373;
  --text-4: #9ca3af;
  --accent: #0a0a0a;
  --accent-hover: #262626;
  --accent-soft: rgba(10, 10, 10, .08);
  --accent-grad: linear-gradient(135deg, #0a0a0a 0%, #f44583 100%);
  --success: #059669;
  --warn: #d97706;
  --danger: #dc2626;
  --info: #0284c7;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --shadow-card: 0 1px 2px rgba(10, 10, 10, .06), 0 0 0 1px rgba(10, 10, 10, .03);
}

html,
body {
  background: var(--bg-0);
  color: var(--text-1);
}

body.bifrost-shell {
  background: var(--bg-0);
}

body.bifrost-shell .app {
  grid-template-columns: 244px minmax(0, 1fr);
  grid-template-rows: 60px minmax(0, 1fr);
}

body.bifrost-shell .topbar,
.home-topbar {
  background: rgba(255, 255, 255, .9);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 2px rgba(10, 10, 10, .04);
  backdrop-filter: blur(14px);
}

body.bifrost-shell .brand,
.home-brand {
  color: var(--text-1);
  cursor: pointer;
  min-width: max-content;
}

body.bifrost-shell .brand-mark,
.home-brand-mark {
  width: 24px;
  height: 24px;
  border-radius: 7px;
  background: var(--accent-grad);
  box-shadow: none;
}

body.bifrost-shell .brand-sep {
  color: var(--text-4);
}

body.bifrost-shell .brand-sub,
body.bifrost-shell .bread,
.home-muted {
  color: var(--text-3);
}

body.bifrost-shell .bread {
  justify-content: flex-start;
  flex: 0 1 auto;
  min-width: 130px;
}

.bifrost-global-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 10px;
  margin-right: auto;
  padding: 3px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.bifrost-global-nav a {
  color: var(--text-2);
  text-decoration: none;
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 650;
  white-space: nowrap;
}

.bifrost-global-nav a:hover {
  color: var(--text-1);
  background: var(--bg-1);
}

.bifrost-global-nav a.active {
  color: var(--accent);
  background: var(--bg-1);
  box-shadow: var(--shadow-card);
}

body.bifrost-shell .sidebar {
  background: #fafafa;
  border-right: 1px solid var(--border);
}

body.bifrost-shell .side-label {
  color: var(--text-4);
}

body.bifrost-shell .nav-item {
  color: var(--text-2);
  border: 1px solid transparent;
}

body.bifrost-shell .nav-item:hover {
  background: var(--bg-2);
  color: var(--text-1);
}

body.bifrost-shell .nav-item.active {
  background: #fff;
  color: var(--text-1);
  border-color: var(--border);
  box-shadow: var(--shadow-card);
}

body.bifrost-shell .nav-dot {
  box-shadow: none;
}

body.bifrost-shell .main {
  background: var(--bg-0);
  padding: 28px 34px 80px;
}

body.bifrost-single .topbar {
  gap: 18px;
}

body.bifrost-single .brand {
  cursor: default;
}

body.bifrost-single .bread {
  justify-content: center;
  flex: 1 1 auto;
}

body.bifrost-single .tab-pane.active {
  animation: none;
}

body.bifrost-single .nav-item,
body.bifrost-single .btn,
body.bifrost-single .panel,
body.bifrost-single .preview,
body.bifrost-single .dropzone,
body.bifrost-single .list-row,
body.bifrost-single .task-row,
body.bifrost-single .node-card,
body.bifrost-single .model-card,
body.bifrost-single input,
body.bifrost-single select,
body.bifrost-single textarea {
  transition-duration: .08s;
}

body.bifrost-shell .pane-title {
  color: var(--text-1);
  font-size: 24px;
}

body.bifrost-shell .pane-desc {
  color: var(--text-2);
}

body.bifrost-shell .panel,
body.bifrost-shell .preview,
body.bifrost-shell .stats,
body.bifrost-shell .qr-preview,
body.bifrost-shell .modal,
body.bifrost-shell .cover-stage {
  background: #fff;
  border-color: var(--border);
  box-shadow: var(--shadow-card);
}

body.bifrost-shell .panel-title,
body.bifrost-shell .panel-sub {
  color: var(--text-3);
}

body.bifrost-shell .panel-title::after {
  background: var(--border);
}

body.bifrost-shell input[type=text],
body.bifrost-shell input[type=number],
body.bifrost-shell input[type=password],
body.bifrost-shell input[type=url],
body.bifrost-shell select,
body.bifrost-shell textarea {
  background: #fff;
  border-color: var(--border);
  color: var(--text-1);
}

body.bifrost-shell input:focus,
body.bifrost-shell select:focus,
body.bifrost-shell textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(10, 10, 10, .12);
  background: #fff;
}

body.bifrost-shell .dropzone,
body.bifrost-shell .compare-slot,
body.bifrost-shell .grid-slot {
  background: #fafafa;
  border-color: var(--border-strong);
}

body.bifrost-shell .dropzone:hover,
body.bifrost-shell .dropzone.over,
body.bifrost-shell .compare-slot:hover,
body.bifrost-shell .grid-slot:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
}

body.bifrost-shell .btn-primary {
  background: var(--accent);
}

body.bifrost-shell .btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

body.bifrost-shell .btn-secondary,
body.bifrost-shell .seg,
body.bifrost-shell .chip,
body.bifrost-shell .tag,
body.bifrost-shell .size-chip {
  background: var(--bg-2);
  border-color: var(--border);
  color: var(--text-2);
}

body.bifrost-shell .seg button.on,
body.bifrost-shell .chip.on {
  background: #fff;
  color: var(--accent);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-card);
}

body.bifrost-shell .list-row,
body.bifrost-shell .task-row,
body.bifrost-shell .node-card,
body.bifrost-shell .model-card {
  background: #fff;
  border-color: var(--border);
  box-shadow: var(--shadow-card);
}

body.bifrost-shell .list-row:hover,
body.bifrost-shell .task-row:hover,
body.bifrost-shell .node-card:hover,
body.bifrost-shell .model-card:hover {
  background: #fafafa;
  border-color: var(--border-strong);
}

body.bifrost-shell .toast,
.bifrost-toast {
  background: #0a0a0a;
  border-color: #0a0a0a;
  color: #fff;
}

.home-shell {
  min-height: 100vh;
  background: var(--bg-0);
}

.home-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 18px;
  height: 64px;
  padding: 0 28px;
}

.home-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.home-brand-mark {
  display: inline-block;
}

.home-main {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 30px 0 70px;
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 18px;
  margin-bottom: 22px;
}

.home-title {
  margin: 0 0 7px;
  font-size: 30px;
  line-height: 1.15;
  letter-spacing: 0;
}

.home-subtitle {
  margin: 0;
  color: var(--text-2);
  font-size: 14px;
}

.home-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.home-searchbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  margin: 20px 0 14px;
}

.home-searchbar input {
  min-height: 42px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-1);
  padding: 0 14px;
  font-size: 14px;
  box-shadow: var(--shadow-card);
}

.home-filter {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.home-filter button,
.home-link-button,
.favorite-button {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-2);
  border-radius: 8px;
  padding: 8px 12px;
  font-weight: 700;
  cursor: pointer;
}

.home-filter button.active,
.home-filter button:hover,
.home-link-button:hover,
.favorite-button:hover,
.favorite-button.active {
  color: var(--accent);
  border-color: var(--border-accent);
  background: var(--accent-soft);
}

.tool-section {
  margin-top: 24px;
}

.tool-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.tool-section-title {
  margin: 0;
  font-size: 16px;
  letter-spacing: 0;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(238px, 1fr));
  gap: 12px;
}

.tool-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 154px;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-card);
  text-decoration: none;
  color: inherit;
}

.tool-card:hover {
  border-color: var(--border-strong);
  box-shadow: 0 10px 28px rgba(10, 10, 10, .08);
  transform: translateY(-1px);
}

.tool-card-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 10px;
}

.tool-card-title {
  margin: 0;
  font-size: 15px;
  letter-spacing: 0;
}

.tool-card-desc {
  margin: 0;
  color: var(--text-2);
  font-size: 12px;
  line-height: 1.55;
}

.tool-card-meta {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: auto;
  color: var(--text-3);
  font-size: 11px;
}

.category-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
}

.cat-图片 { background: #0a0a0a; }
.cat-视频 { background: #db2777; }
.cat-AI { background: #7c3aed; }
.cat-机场 { background: #0891b2; }
.cat-原始备份 { background: #737373; }

.empty-home {
  padding: 40px 20px;
  text-align: center;
  color: var(--text-3);
  background: #fff;
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
}

@media (max-width: 1060px) {
  body.bifrost-shell .topbar {
    gap: 10px;
  }

  .bifrost-global-nav {
    max-width: 44vw;
    overflow-x: auto;
  }

  body.bifrost-shell .bread {
    display: none;
  }
}

@media (max-width: 820px) {
  body.bifrost-shell .app {
    display: block;
    height: auto;
  }

  body.bifrost-shell .topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    height: auto;
    min-height: 58px;
    padding: 10px 14px;
    flex-wrap: wrap;
  }

  .bifrost-global-nav {
    order: 3;
    width: 100%;
    max-width: none;
    margin: 2px 0 0;
  }

  body.bifrost-shell .sidebar {
    display: flex;
    flex-direction: row;
    gap: 6px;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--border);
    padding: 8px 10px;
  }

  body.bifrost-shell .side-label,
  body.bifrost-shell .side-footer {
    display: none;
  }

  body.bifrost-shell .nav-item {
    min-width: max-content;
    margin: 0;
  }

  body.bifrost-shell .nav-item::before {
    display: none;
  }

  body.bifrost-shell .main {
    padding: 18px 14px 50px;
    overflow: visible;
  }

  body.bifrost-shell .pane-head-row,
  .home-hero,
  .home-searchbar {
    grid-template-columns: 1fr;
  }

  body.bifrost-shell .pane-head-row {
    display: grid;
  }

  .home-topbar {
    padding: 0 16px;
  }

  .home-main {
    width: min(100% - 24px, 1180px);
    padding-top: 20px;
  }

  .home-actions {
    justify-content: flex-start;
  }
}