1 files changed, 63 insertions, 0 deletions
diff --git a/src/frontend/app/components/layout/AppShell.css b/src/frontend/app/components/layout/AppShell.css
new file mode 100644
index 0000000..89a4d1f
--- /dev/null
+++ b/src/frontend/app/components/layout/AppShell.css
@@ -0,0 +1,63 @@
+.app-shell {
+  display: flex;
+  flex-direction: column;
+  height: 100dvh;
+  width: 100%;
+  overflow: hidden;
+  background-color: var(--background-color);
+}
+
+.app-shell__header {
+  flex-shrink: 0;
+  z-index: 10;
+}
+
+.app-shell__body {
+  display: flex;
+  flex: 1;
+  overflow: hidden;
+  position: relative;
+}
+
+.app-shell__sidebar {
+  display: none; /* Hidden on mobile */
+  width: 80px;
+  border-right: 1px solid var(--border-color);
+  background: var(--background-color);
+  flex-shrink: 0;
+  z-index: 5;
+}
+
+.app-shell__main {
+  flex: 1;
+  overflow: auto;
+  overflow-x: hidden;
+  position: relative;
+}
+
+.app-shell__bottom-nav {
+  flex-shrink: 0;
+  display: block; /* Visible on mobile */
+  z-index: 10;
+}
+
+/* Desktop styles */
+@media (min-width: 768px) {
+  .app-shell__sidebar {
+    display: block;
+  }
+
+  .app-shell__bottom-nav {
+    display: none;
+  }
+
+  /* Override NavBar styles for sidebar */
+  .app-shell__sidebar .navigation-bar {
+    flex-direction: column;
+    height: 100%;
+    justify-content: flex-start;
+    padding-top: 1rem;
+    gap: 1rem;
+    border-top: none;
+  }
+}