Design hotfixes and improvements.

frontend/src/App.css

@@ -9,16 +9,141 @@
 
 .app-content {
   flex: 1;
+  min-height: 0;
   overflow-y: auto;
-  overscroll-behavior: contain;
-  padding-bottom: calc(6rem + env(safe-area-inset-bottom));
+  overscroll-behavior-y: contain;
 }
 
-@keyframes fadeInUp {
-  from { opacity: 0; transform: translateY(14px); }
-  to { opacity: 1; transform: translateY(0); }
+/* Mobile-specific styles */
+.mobile-view {
+  width: 100%;
+  padding: 0;
+  margin: 0;
 }
 
-@keyframes spin {
-  to { transform: rotate(360deg); }
+/* Desktop-specific styles */
+.desktop-view {
+  max-width: 100%;
+  padding: 0 var(--margin-main);
+}
+
+/* Mobile-specific view adjustments */
+@media (max-width: 768px) {
+  .app-logo-wrapper {
+    flex-direction: column;
+  }
+  
+  .home-card--scan {
+    min-height: 4.25rem;
+    padding: 0.75rem 1.25rem;
+  }
+  
+  .home-card-icon {
+    width: 2.75rem;
+    height: 2.75rem;
+  }
+}
+
+/* Tablet-specific styles */
+@media (min-width: 769px) and (max-width: 1024px) {
+  .home-card {
+    min-height: 4rem;
+    padding: 0.625rem 1rem;
+  }
+}
+
+/* Desktop-specific styles */
+@media (min-width: 1025px) {
+  .app-content {
+    padding: 0 5rem;
+  }
+  
+  .home-card {
+    min-height: 3.5rem;
+    padding: 0.5rem 0.875rem;
+  }
+}
+
+body {
+  min-height: 100vh;
+  font-size: calc(16px + 0.5vmin);
+  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
+  color: var(--on-surface);
+  background-color: var(--surface-container-lowest);
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+/* Touch target sizing for mobile */
+@media (max-width: 768px) {
+  a, button {
+    min-height: 4rem;
+    padding: 1rem;
+  }
+}
+
+/* Card styling improvements */
+.home-card {
+  width: 100%;
+  max-width: 28rem;
+  min-height: fit-content;
+  transition: transform 0.15s, box-shadow 0.15s;
+}
+
+.home-card:hover {
+  transform: translateY(-3px);
+  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.1);
+}
+
+/* Fluid typography */
+.home-desc {
+  font-size: clamp(1rem, 100vw, 1.5rem);
+  max-width: 100%;
+}
+
+.home-card-label {
+  font-size: clamp(1rem, 100vw, 1.25rem);
+}
+
+/* Global button styles using pastel variables */
+button,
+.btn {
+  appearance: none;
+  background: var(--primary);
+  color: var(--on-primary);
+  border: none;
+  padding: 0.6rem 1rem;
+  border-radius: var(--radius);
+  box-shadow: var(--primary-shadow);
+  transition: background-color 160ms ease, transform 120ms ease, box-shadow 160ms ease;
+  cursor: pointer;
+}
+
+button:hover,
+.btn:hover {
+  background: var(--primary-hover);
+  transform: translateY(-1px);
+}
+
+button:focus,
+.btn:focus {
+  outline: none;
+  box-shadow: 0 0 0 6px var(--primary-ring);
+}
+
+/* Outline / subtle buttons */
+.btn--outline {
+  background: transparent;
+  color: var(--on-secondary);
+  border: 1px solid var(--secondary-container);
+}
+
+.btn--secondary {
+  background: var(--secondary);
+  color: var(--on-secondary);
+}
+
+.btn--ghost {
+  background: transparent;
+  color: var(--on-surface);
 }