.shell.has-collapsible-sidebar { grid-template-columns: 280px minmax(0, 1fr); }
.shell.has-collapsible-sidebar.is-sidebar-collapsed { grid-template-columns: 72px minmax(0, 1fr); }
.has-collapsible-sidebar > .frame { grid-column: 2; }
.has-collapsible-sidebar > .sidebar { grid-column: 1; position: sticky; top: 0; height: 100dvh; min-height: 0; padding: 16px; gap: 18px; overflow: hidden; border-right: 1px solid #0000001f; border-bottom: 0; z-index: 20; }
.sidebar-header { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.sidebar-header .brand { min-width: 0; flex: 1; gap: 10px; }
.sidebar-header .brand-mark { width: 42px; height: 42px; flex-shrink: 0; border-radius: 12px; }
.sidebar-header .brand h1 { font-size: 1.35rem; }
.sidebar-header .brand .eyebrow { font-size: 0.6rem; letter-spacing: 0.05em; }
.sidebar-toggle { display: grid; place-items: center; flex-shrink: 0; width: 34px; height: 36px; border: 1px solid #00000026; border-radius: 8px; color: inherit; background: #ffffffa6; cursor: pointer; }
.sidebar-icon { display: inline-block; flex-shrink: 0; width: 20px; font-size: 1.1rem; line-height: 1.2; text-align: center; vertical-align: middle; }
.sidebar-label { min-width: 0; }
.sidebar .sidebar-nav { min-height: 0; overflow-y: auto; overflow-x: hidden; overscroll-behavior: contain; scrollbar-width: thin; padding: 0 2px 12px 0; }
.sidebar .sidebar-nav > * { flex-shrink: 0; }
.sidebar .nav-item, .sidebar .nav-subgroup-title-link { display: flex; align-items: center; gap: 9px; }
.sidebar .nav-group .nav-subgroup > summary { display: flex; align-items: center; gap: 8px; min-height: 44px; padding: 10px; list-style: none; font-size: 0.88rem; line-height: 1.35; }
.sidebar .nav-subgroup > summary::-webkit-details-marker { display: none; }
.sidebar .nav-subgroup > summary::marker { content: ""; }
.sidebar .nav-subgroup > summary::before { content: ""; flex: 0 0 auto; width: 0; height: 0; border-top: 4px solid transparent; border-bottom: 4px solid transparent; border-left: 6px solid currentColor; opacity: 0.75; }
.sidebar .nav-subgroup[open] > summary::before { transform: rotate(90deg); }
.sidebar .nav-subgroup > summary > .sidebar-icon { margin: 0; }
.sidebar .nav-subgroup > summary > .sidebar-label { flex: 1; }
.sidebar .nav-subgroup > summary > .nav-subgroup-title-link { flex: 1 1 0%; min-width: 0; width: auto; gap: 8px; line-height: inherit; }
.sidebar .nav-subgroup > summary:hover { background: #ffffff80; }
.sidebar [hidden], .sidebar-flyout[hidden], .sidebar-rail-tooltip[hidden], .sidebar-scrim[hidden] { display: none !important; }
.sidebar-rail { display: flex; flex-direction: column; align-items: center; gap: 5px; min-height: 0; overflow-y: auto; overflow-x: hidden; overscroll-behavior: contain; scrollbar-width: thin; padding-bottom: 10px; }
.sidebar-rail-button { display: grid; place-items: center; width: 44px; min-height: 42px; flex-shrink: 0; border: 1px solid transparent; border-radius: 9px; background: #ffffff8c; color: #303844; cursor: pointer; }
.sidebar-rail-button .sidebar-icon { width: 24px; font-size: 1.3rem; }
.sidebar-rail-button:hover, .sidebar-rail-button[aria-expanded="true"] { border-color: #8b9bad; background: #fff; }
.sidebar-rail-button.is-active { background: #e1e8f0; border-color: #566f8f; color: #163657; box-shadow: inset 3px 0 #284363; }
.sidebar-rail-divider { display: block; width: 26px; height: 1px; background: #00000024; margin: 7px 0; flex-shrink: 0; }
.is-sidebar-collapsed > .sidebar { padding: 12px 7px; gap: 14px; }
.is-sidebar-collapsed .sidebar-header { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.is-sidebar-collapsed .sidebar-header .brand { flex: 0; }
.is-sidebar-collapsed .sidebar-header .brand > div { display: none; }
.is-sidebar-collapsed .brand-mark { width: 38px; height: 38px; }
.sidebar-flyout { position: fixed; z-index: 45; max-height: calc(100dvh - 16px); overflow: auto; box-sizing: border-box; padding: 13px; border: 1px solid #c1c8d2; border-radius: 11px; background: #f7f8fa; box-shadow: 0 12px 38px #182b4330; }
.sidebar-flyout-heading { display: grid; grid-template-columns: minmax(0, 1fr) 32px; gap: 10px; align-items: start; margin-bottom: 10px; }
.sidebar-flyout-heading h2 { margin: 3px 0; font-size: 0.95rem; line-height: 1.4; }
.sidebar-flyout-close { width: 32px; height: 32px; border: 1px solid #b7c0ce; border-radius: 7px; background: #fff; color: inherit; cursor: pointer; }
.sidebar-flyout nav { display: grid; gap: 5px; }
.sidebar-flyout-link { display: flex; align-items: center; gap: 10px; width: 100%; padding: 10px; border: 1px solid transparent; border-radius: 7px; background: #fff; color: inherit; text-align: left; cursor: pointer; font-size: 0.85rem; }
.sidebar-flyout-link:hover { border-color: #8b9bad; }
.sidebar-flyout-link.is-active { border-color: #667f9c; background: #e6edf6; }
.sidebar-rail-tooltip { position: fixed; z-index: 46; max-width: min(280px, calc(100vw - 95px)); padding: 8px 11px; border-radius: 6px; background: #25364b; color: #fff; box-shadow: 0 3px 9px #0002; font-size: 0.8rem; line-height: 1.4; pointer-events: none; }
.sidebar-toggle:focus-visible, .sidebar-rail-button:focus-visible, .sidebar-flyout button:focus-visible { outline: 3px solid #316797; outline-offset: 2px; }
.sidebar-scrim { position: fixed; inset: 0; z-index: 19; padding: 0; border: 0; background: #14243b66; cursor: pointer; }
body.sidebar-overlay-open { overflow: hidden; }
@media (max-width: 760px) {
  .shell.has-collapsible-sidebar, .shell.has-collapsible-sidebar.is-sidebar-collapsed { grid-template-columns: 56px minmax(0, 1fr); }
  .has-collapsible-sidebar > .sidebar { position: fixed; inset: 0 auto 0 0; width: min(280px, calc(100vw - 36px)); z-index: 20; padding: 12px; }
  .has-collapsible-sidebar.is-sidebar-collapsed > .sidebar { position: sticky; inset: auto; top: 0; width: 56px; padding: 10px 4px; }
  .is-sidebar-collapsed .brand-mark { width: 32px; height: 32px; font-size: 1.1rem; }
  .sidebar-rail-button { width: 38px; min-height: 40px; }
  .sidebar-rail-button .sidebar-icon { font-size: 1.15rem; }
}