/* 两级功能导航；品牌配色沿用现有 tokens。 */
.shell { grid-template-columns: var(--primary-width, 200px) minmax(0, 1fr); }
.shell.has-secondary { grid-template-columns: var(--primary-width, 200px) var(--secondary-width, 240px) minmax(0, 1fr); }
.sidebar { padding: 20px 8px 12px; z-index: 45; }
.sidebar .brand { padding: 0 4px 24px; gap: 8px; }
.sidebar .nav { margin-top: 20px; }
.sidebar .nav a { gap: 8px; padding: 0 12px; }
.primary-closed #sidebar .nav-label, .primary-closed .account-info { display: none; }
.primary-closed #sidebar .btn { padding: 0; }
.primary-closed .brand { justify-content: center; }
.secondary-nav { position: sticky; top: 0; height: 100vh; padding: 24px 8px; border-right: 1px solid var(--line); background: var(--surface); min-width: 0; }
.secondary-heading { min-height: 40px; margin: 0 8px 8px; white-space: nowrap; }
.secondary-nav .nav { margin-top: 20px; }
.secondary-nav .nav a { padding: 0 8px; gap: 8px; white-space: nowrap; }
.secondary-closed .secondary-nav .nav-label { display: none; }
.secondary-closed .secondary-nav .btn { padding: 0; width: 40px; }
.secondary-closed .sidebar-divider { display: none; }
.sidebar-divider { position: absolute; right: -4px; top: 0; bottom: 0; width: 8px; cursor: col-resize; z-index: 2; touch-action: none; }
.sidebar-divider:hover, .sidebar-divider:focus-visible { background: var(--bg-sunken); }
.account-area { margin-top: auto; position: relative; padding-top: 16px; }
.account-button { display: flex; width: 100%; min-height: 64px; align-items: center; gap: 8px; padding: 8px; border: 0; border-radius: 12px; background: var(--surface-hover); color: var(--ink); cursor: pointer; text-align: left; }
.account-avatar { display: grid; place-items: center; flex: 0 0 32px; height: 32px; border-radius: 50%; background: var(--surface); font-size: 18px; font-weight: 700; }
.account-info { display: grid; min-width: 0; font-size: 12px; line-height: 20px; }
#accountId { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account-menu { position: absolute; bottom: calc(100% + 8px); left: 0; width: 288px; max-width: calc(100vw - 24px); padding: 8px; border: 1px solid var(--line-strong); border-radius: 12px; background: var(--surface); z-index: 70; }
.account-menu-head { padding: 12px; border-bottom: 1px solid var(--line); margin-bottom: 8px; }
.account-menu a, .account-menu button { display: flex; align-items: center; gap: 12px; width: 100%; min-height: 44px; padding: 8px 12px; border: 0; background: transparent; color: var(--ink); font: inherit; text-decoration: none; cursor: pointer; border-radius: 8px; }
.account-menu a:hover, .account-menu button:hover { background: var(--surface-hover); }
.account-menu #logoutBtn { color: var(--error); border-top: 1px solid var(--line); border-radius: 0; margin-top: 8px; }
.primary-closed .account-menu .nav-label { display: inline !important; }
.dashboard-intro { padding-bottom: 32px; border-bottom: 1px solid var(--line); margin-bottom: 32px; }
.dashboard-summary { display: flex; gap: 32px; flex-wrap: wrap; margin-top: 24px; }
.dashboard-summary p { display: grid; gap: 4px; }
.dashboard-summary strong { font-size: 24px; }
.dashboard-recent { margin-top: 40px; }
.dashboard-recent > .row { margin-bottom: 16px; }
.dashboard-task { display: flex; align-items: center; gap: 24px; padding: 20px 8px; border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; flex-wrap: wrap; }
.dashboard-task:hover { background: var(--surface-hover); }
.dashboard-task-copy { display: grid; gap: 8px; flex: 1 1 240px; min-width: 0; overflow-wrap: anywhere; }
.dashboard-start { padding: 24px 0; border-top: 1px solid var(--line); }
.dashboard-start p { max-width: 65ch; margin: 12px 0 20px; }
.hist-card { cursor: default; }
.hist-card .grow { min-width: 0; overflow-wrap: anywhere; }
.hist-card > .btn { align-self: flex-start; margin-top: auto; }
.editor-top { flex-wrap: wrap; align-items: center; }
.editor-top h1 { flex: 1 1 320px; min-width: 0; overflow-wrap: anywhere; }
.editor-top > .row { flex-wrap: wrap; }
@container workspace (max-width: 900px) {
  .editor-top h1 { flex-basis: calc(100% - 180px); }
  .editor-top > .row { flex: 1 1 100%; }
  .lib-detail { grid-template-columns: minmax(0, 1fr); }
  .lib-detail > .panel:last-child { grid-row: 1; }
}
.lib-detail .panel-head { flex-wrap: wrap; }
.lib-detail .panel-head h2 { flex-shrink: 0; }
.dropzone[aria-disabled=true] { cursor: progress; opacity: .7; }
.account-details { max-width: 640px; }
@media (max-width: 1100px) { .shell.has-secondary main { padding: 24px; } }
@media (max-width: 767px) {
  .shell, .shell.has-secondary { grid-template-columns: minmax(0, 1fr); }
  .sidebar { width: 200px; z-index: 60; }
  .secondary-nav { position: static; height: auto; grid-column: 1; padding: 8px 16px; border-bottom: 1px solid var(--line); }
  .secondary-heading, #secondaryToggle, .sidebar-divider { display: none; }
  .secondary-nav .nav { flex-direction: row; margin: 0; }
  .secondary-closed .secondary-nav .nav-label { display: inline; }
  .primary-closed #sidebar .nav-label, .primary-closed .account-info { display: grid; }
  .primary-closed .brand { justify-content: flex-start; }
  #primaryToggle { display: none; }
  .shell.has-secondary main { padding: 16px; }
}

/* 两层导航占用宽度后，按工作区实际空间排列内容。 */
.shell main { container: workspace / inline-size; }
.workbench { grid-template-columns: 400px minmax(0, 1fr); }
.workbench > * { min-width: 0; }
@container workspace (max-width: 900px) {
  .workbench { grid-template-columns: minmax(0, 1fr); }
  .workbench .steps { position: static; max-height: none; overflow: visible; }
}
@container workspace (max-width: 600px) {
  .workbench .empty.brand-empty { grid-template-columns: minmax(0, 1fr); text-align: center; padding: 24px; }
  .workbench .empty.brand-empty img { margin: 0 auto; width: 120px; height: 180px; }
  .workbench .row { flex-wrap: wrap; }
}