responsive layout fixes for mobile and desktop

- style.css: shrink nav-link padding, wrap nav-links on mobile,
  reduce container margin, responsive modal
- goals.css: stack goal cards vertically on small screens
- tasks.css: fix scroll-view height for mobile (50-55vh),
  side-panel width uses percentage (85%), add small-screen
  breakpoint at 480px
- notes.css: stack filters vertically on mobile, remove
  min-width constraints

static/css/goals.css

@@ -128,3 +128,23 @@
 .empty-state h3 {
     margin-bottom: 1rem;
 }
+
+@media (max-width: 640px) {
+    .goals-header {
+        flex-direction: column;
+        align-items: stretch;
+        gap: 0.75rem;
+    }
+
+    .goal-card {
+        flex-direction: column;
+        align-items: stretch;
+        gap: 0.75rem;
+        padding: 1rem;
+    }
+
+    .goal-actions {
+        justify-content: flex-end;
+        flex-wrap: wrap;
+    }
+}

static/css/notes.css

@@ -254,4 +254,18 @@
         flex-direction: column;
         gap: 0;
     }
+
+    .notes-filters {
+        flex-direction: column;
+        align-items: stretch;
+    }
+
+    .filter-group select {
+        min-width: 0;
+        width: 100%;
+    }
+
+    .search-group {
+        min-width: 0;
+    }
 }

static/css/style.css

@@ -29,15 +29,18 @@ body {
 .nav-links {
     display: flex;
     align-items: center;
-    gap: 1rem;
+    gap: 0.5rem;
+    flex-wrap: wrap;
+    justify-content: flex-end;
 }
 
 .nav-link {
     color: white;
     text-decoration: none;
-    padding: 0.5rem 1rem;
+    padding: 0.4rem 0.6rem;
     border-radius: 4px;
     transition: background-color 0.2s;
+    white-space: nowrap;
 }
 
 .nav-link:hover {
@@ -251,3 +254,32 @@ body {
     gap: 1rem;
     margin-top: 1rem;
 }
+
+@media (max-width: 640px) {
+    .navbar {
+        padding: 0.5rem 0.75rem;
+        flex-wrap: wrap;
+        gap: 0.25rem;
+    }
+
+    .nav-brand {
+        font-size: 1.15rem;
+    }
+
+    .container {
+        margin: 0.75rem auto;
+    }
+
+    .modal-content {
+        margin: 0.5rem;
+        padding: 1rem;
+    }
+
+    .modal-actions {
+        flex-wrap: wrap;
+    }
+
+    .modal-actions .btn-danger {
+        width: 100%;
+    }
+}

static/css/tasks.css

@@ -202,8 +202,9 @@
     .side-panel {
         position: fixed;
         top: 0;
-        right: -400px;
-        width: 400px;
+        right: -100%;
+        width: 85%;
+        max-width: 400px;
         height: 100%;
         background: white;
         box-shadow: -2px 0 8px rgba(0,0,0,0.1);
@@ -216,6 +217,24 @@
     .side-panel.active {
         right: 0;
     }
+
+    .scroll-view {
+        height: 55vh;
+    }
+}
+
+@media (max-width: 480px) {
+    .scroll-view {
+        height: 50vh;
+    }
+
+    .tasks-list {
+        padding: 30vh 1rem;
+    }
+
+    .goal-selector-container select {
+        min-width: 140px;
+    }
 }
 
 @media (orientation: landscape) and (min-width: 1024px) {