Work/Frontend/src/components/shell/AppShell/AppShell.module.scss

.shell {
  height: 100dvh;
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  background: var(--color-canvas);
  color: var(--color-text);
}

.body {
  --rail-width: 4.75rem;
  --sidebar-width: 16.75rem;
  --shell-top-left-radius: calc(var(--radius-xl) + var(--space-1));
  --shell-frame-border: color-mix(in srgb, var(--color-border-strong) 44%, transparent);
  --shell-divider-border: color-mix(in srgb, var(--color-border-strong) 34%, transparent);
  --sidebar-panel-surface: color-mix(in srgb, var(--color-surface-muted) 92%, transparent);
  --workspace-panel-surface: color-mix(in srgb, var(--color-canvas) 94%, var(--color-surface));
  position: relative;
  min-height: 0;
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, 1fr);
  overflow: hidden;
  background: var(--color-surface);
}

.bodyRailCollapsed {
  --rail-width: 0rem;
}

.bodySidebarCollapsed {
  --sidebar-width: 0rem;
}

.railColumn {
  min-height: 0;
  display: flex;
  position: relative;
  z-index: 6;
  isolation: isolate;
  overflow: visible;
  background: var(--color-surface);
}

.workspaceRegion {
  position: relative;
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  overflow: visible;
  z-index: 1;
  isolation: isolate;
  border-top-left-radius: var(--shell-top-left-radius);
  border-top-right-radius: 0;
}

.workspaceRegion::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      to right,
      var(--sidebar-panel-surface) 0,
      var(--sidebar-panel-surface) calc(var(--sidebar-width) - 0.5px),
      var(--workspace-panel-surface) calc(var(--sidebar-width) - 0.5px),
      var(--workspace-panel-surface) 100%
    );
  border: 1px solid var(--shell-frame-border);
  border-top: 0;
  border-top-left-radius: var(--shell-top-left-radius);
  border-top-right-radius: 0;
  box-shadow: inset 0 1px 0 color-mix(in srgb, white 3%, transparent);
  pointer-events: none;
  z-index: 0;
}

.sidebarColumn {
  position: relative;
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  overflow: visible;
  z-index: 1;
  background: var(--sidebar-panel-surface);
  border-top: 1px solid var(--shell-frame-border);
  border-left: 1px solid var(--shell-frame-border);
  border-top-left-radius: var(--shell-top-left-radius);
}

.workspaceMain {
  min-width: 0;
  min-height: 0;
  position: relative;
  overflow: hidden;
  z-index: 1;
  border-top: 1px solid var(--shell-frame-border);
  border-left: 1px solid var(--shell-divider-border);
  background: var(--workspace-panel-surface);
  border-top-right-radius: 0;
}

.sidebarDock {
  position: absolute;
  bottom: var(--space-3);
  left: calc(var(--space-1) + (var(--rail-width) * 0.1));
  width: max(12rem, calc(var(--sidebar-width) + (var(--rail-width) * 0.9) - var(--space-2)));
  right: auto;
  z-index: calc(var(--z-modal) + 1);
  pointer-events: none;

  > * {
    pointer-events: auto;
  }
}

@include respond-up(mobile) {
  .body {
    --rail-width: 5rem;
    --sidebar-width: 17.25rem;
  }

  .bodyRailCollapsed {
    --rail-width: 0rem;
  }

  .bodySidebarCollapsed {
    --sidebar-width: 0rem;
  }
}

@include respond-down(tablet) {
  .body {
    --rail-width: 4.5rem;
    --sidebar-width: 13.25rem;
  }

  .bodyRailCollapsed {
    --rail-width: 0rem;
  }

  .bodySidebarCollapsed {
    --sidebar-width: 0rem;
  }
}

.bodyRailCollapsed .railColumn {
  overflow: hidden;
}

.bodySidebarCollapsed .railColumn {
  --rail-dock-clearance: 0rem;
}

.bodySidebarCollapsed:not(.bodyRailCollapsed) .railColumn {
  --rail-bottom-offset: var(--space-3);
}

.bodySidebarCollapsed .sidebarColumn {
  --sidebar-dock-clearance: 0rem;
  display: none;
  overflow: hidden;
  border-left-width: 0;
  border-top-width: 0;
}

.bodySidebarCollapsed .workspaceRegion {
  grid-template-columns: minmax(0, 1fr);
}

.bodySidebarCollapsed .workspaceMain {
  border-left-color: transparent;
}

.bodySidebarCollapsed:not(.bodyRailCollapsed) .workspaceMain {
  border-top-width: 1px;
  border-top-color: var(--shell-frame-border);
  border-left-color: var(--shell-frame-border);
  border-top-left-radius: var(--shell-top-left-radius);
  box-shadow: none;
}

.bodySidebarCollapsed:not(.bodyRailCollapsed) .workspaceRegion::before {
  display: none;
}

.bodySidebarCollapsed .sidebarDock {
  display: none;
}

@include respond-down(mobile) {
  .body {
    grid-template-columns: 4.5rem minmax(0, 1fr);
    --rail-width: 4.5rem;
  }

  .railColumn {
    position: sticky;
    top: 0;
  }

  .workspaceRegion,
  .sidebarDock {
    display: none;
  }
}