feat(frontend): implemented mobile friendly UI responsiveness

7project/frontend/src/ui.css

@@ -48,26 +48,49 @@ body[data-theme="dark"] {
 .card h3 { margin: 0 0 12px; }
 
 /* Forms */
-.input, select, textarea {
+/* Common field styles (no custom arrow here) */
+.input, textarea {
   width: 100%;
   padding: 10px 12px;
   border-radius: 10px;
   border: 1px solid var(--border);
   background-color: var(--panel);
   color: var(--muted);
+}
 
-  /* Add these properties specifically for the select element */
+/* Select-only: show custom dropdown arrow */
+select.input {
   -webkit-appearance: none;
   -moz-appearance: none;
   appearance: none;
 
-  padding-right: 32px; /* Add space for the custom arrow */
+  padding-right: 32px; /* room for the arrow */
   background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
   background-position: right 0.5rem center;
   background-repeat: no-repeat;
   background-size: 1.5em 1.5em;
   cursor: pointer;
 }
+
+.pie-grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 16px;
+}
+
+@media (max-width: 900px) {
+  .pie-grid {
+    grid-template-columns: 1fr;
+  }
+}
+
+/* Make charts scale nicely within the cards */
+.pie-card canvas, .pie-card svg {
+  max-width: 100%;
+  height: auto;
+  display: block;
+}
+
 .input:focus, select:focus, textarea:focus {
   outline: 2px solid var(--primary);
   outline-offset: 2px;
@@ -151,3 +174,117 @@ body.auth-page #root {
   justify-content: space-between;
   align-items: center;
 }
+
+
+/* Responsive enhancements */
+
+/* Off-canvas sidebar + hamburger for mobile */
+@media (max-width: 900px) {
+  .app-layout {
+    grid-template-columns: 1fr;
+    min-height: 100dvh;
+    position: relative;
+  }
+  .sidebar {
+    position: fixed;
+    inset: 0 auto 0 0;
+    width: 80vw;
+    max-width: 320px;
+    transform: translateX(-100%);
+    transition: transform 200ms ease;
+    z-index: 1000;
+    overflow-y: auto;
+  }
+  .app-layout.sidebar-open .sidebar {
+    transform: translateX(0);
+  }
+  .hamburger {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    width: 40px;
+    height: 40px;
+    margin-right: 8px;
+  }
+  .topbar { position: sticky; top: 0; z-index: 500; }
+}
+
+@media (min-width: 901px) {
+  .hamburger { display: none; }
+}
+
+/* Backdrop when sidebar is open */
+.backdrop {
+  position: fixed;
+  inset: 0;
+  background: rgba(0,0,0,0.45);
+  z-index: 900;
+}
+
+/* Responsive table: convert to card list on small screens */
+.table.responsive { width: 100%; }
+@media (max-width: 700px) {
+  .table.responsive thead { display: none; }
+  .table.responsive tbody tr {
+    display: block;
+    border: 1px solid var(--border, #2a2f45);
+    border-radius: 8px;
+    margin-bottom: 12px;
+    overflow: hidden;
+    background: var(--panel);
+  }
+  .table.responsive tbody td {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 12px;
+    padding: 10px 12px;
+    border-bottom: 1px solid var(--border);
+    text-align: left !important; /* override any right align */
+  }
+  .table.responsive tbody td:last-child { border-bottom: 0; }
+  .table.responsive tbody td::before {
+    content: attr(data-label);
+    font-weight: 600;
+    color: var(--muted);
+  }
+  .table.responsive .actions { width: 100%; justify-content: flex-end; }
+  .table.responsive .amount { font-weight: 600; }
+}
+
+/* Filters and controls wrapping */
+@media (max-width: 900px) {
+  .form-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
+}
+@media (max-width: 700px) {
+  .form-row { grid-template-columns: 1fr; }
+}
+
+.table-controls { gap: 12px; }
+@media (max-width: 700px) {
+  .table-controls { flex-direction: column; align-items: stretch; }
+  .table-controls .actions { width: 100%; }
+  .table-controls .actions .btn { flex: 1 0 auto; }
+}
+
+/* Touch-friendly sizes */
+.btn, .input, select.input { min-height: 40px; }
+.btn.small { min-height: 36px; }
+
+/* Connection rows on mobile */
+@media (max-width: 700px) {
+  .connection-row { flex-direction: column; align-items: stretch; gap: 8px; }
+  .connection-row .btn { width: 100%; }
+}
+
+/* Charts should scale to container */
+.card canvas, .card svg { max-width: 100%; height: auto; display: block; }
+
+
+/* Horizontal scroll container for wide charts */
+.chart-scroll {
+  overflow-x: auto;
+  overflow-y: hidden;
+  -webkit-overflow-scrolling: touch; /* momentum scroll on iOS */
+}
+.chart-inner { min-width: 900px; }