feat: responsive mobile layout and touch optimizations

src/web/public/style.css

@@ -382,4 +382,77 @@ header nav a:hover::after {
         transition-duration: 0.01ms !important;
         scroll-behavior: auto !important;
     }
+}
+
+/* Mobile Responsiveness */
+@media (max-width: 768px) {
+    :root {
+        --header-height: 3.5rem;
+        /* Compact header on mobile */
+    }
+
+    body {
+        font-size: 14px;
+        /* Slightly smaller base font */
+    }
+
+    /* Layout Adjustments */
+    header {
+        padding: 0 1rem;
+    }
+
+    header nav a {
+        margin-left: 1rem;
+        font-size: 0.9rem;
+    }
+
+    main {
+        padding: 1rem;
+        width: 100%;
+        max-width: 100%;
+    }
+
+    /* Typography Scaling */
+    h1 {
+        font-size: 1.75rem;
+    }
+
+    h2 {
+        font-size: 1.5rem;
+    }
+
+    h3 {
+        font-size: 1.25rem;
+    }
+
+    /* Card Adjustments */
+    .card {
+        padding: 1.25rem;
+        border-radius: var(--radius-md);
+        /* Slightly smaller radius */
+    }
+
+    /* Stack flex containers if needed (general util) */
+    .flex-col-mobile {
+        flex-direction: column !important;
+    }
+
+    /* Touch Targets */
+    .btn,
+    a,
+    input,
+    select {
+        min-height: 44px;
+        /* Compliance with touch target guidelines */
+    }
+
+    /* Horizontal scroll for wide tables */
+    .table-container {
+        overflow-x: auto;
+        -webkit-overflow-scrolling: touch;
+        margin-left: -1rem;
+        margin-right: -1rem;
+        padding-left: 1rem;
+        padding-right: 1rem;
+    }
 }