style(ui): soften button hover effects across app

- Reduce global .btn:hover lift (no translate) and lighten shadow (0 2px 6px @ 0.08); trim overlay to 0.35
- Tone down .btn-primary/.btn-success/.btn-danger hover lift and shadows
- Align inline .btn:hover in templates (tasks view/edit/create, my_tasks, projects create)
- Preserve focus states and dark mode; no functional changes

Files:
- app/static/base.css
- app/templates/tasks/view.html
- app/templates/tasks/edit.html
- app/templates/tasks/create.html
- app/templates/tasks/my_tasks.html
- templates/projects/create.html

app/static/base.css

@@ -532,7 +532,7 @@ main {
 }
 
 .btn:hover::after {
-    opacity: 1;
+    opacity: 0.35;
 }
 
 /* Button focus states */
@@ -553,8 +553,8 @@ main {
     background: var(--surface-hover) !important;
     border-color: var(--primary-color) !important;
     color: var(--text-primary) !important;
-    transform: translateY(-1px) !important;
-    box-shadow: 0 4px 12px 0 rgba(0, 0, 0, 0.15) !important;
+    transform: none !important;
+    box-shadow: 0 2px 6px 0 rgba(0, 0, 0, 0.08) !important;
 }
 
 .btn:active {
@@ -601,8 +601,8 @@ main {
     background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%) !important;
     border-color: var(--primary-600) !important;
     color: var(--text-on-primary) !important;
-    transform: translateY(-2px) !important;
-    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3), 0 4px 12px rgba(59, 130, 246, 0.2) !important;
+    transform: translateY(-1px) !important;
+    box-shadow: 0 3px 10px rgba(59, 130, 246, 0.18), 0 1px 3px rgba(59, 130, 246, 0.12) !important;
 }
 
 .btn-primary:focus {
@@ -643,8 +643,8 @@ main {
     background: linear-gradient(135deg, #059669 0%, #047857 100%) !important;
     border-color: #059669 !important;
     color: var(--text-on-primary) !important;
-    transform: translateY(-2px) !important;
-    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.3), 0 4px 12px rgba(16, 185, 129, 0.2) !important;
+    transform: translateY(-1px) !important;
+    box-shadow: 0 3px 10px rgba(16, 185, 129, 0.18), 0 1px 3px rgba(16, 185, 129, 0.12) !important;
 }
 
 /* Danger button styling */
@@ -659,7 +659,7 @@ main {
     background: #b91c1c;
     border-color: #b91c1c;
     color: var(--text-on-primary);
-    box-shadow: 0 8px 25px rgba(220, 38, 38, 0.4);
+    box-shadow: 0 3px 10px rgba(220, 38, 38, 0.25);
 }
 
 /* Outline button styling - Enhanced */

app/templates/tasks/create.html

@@ -418,8 +418,8 @@
 
 /* Hover Effects */
 .btn:hover {
-    transform: translateY(-1px);
-    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
+    transform: none;
+    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
 }
 
 .tip-item:hover {

app/templates/tasks/edit.html

@@ -453,8 +453,8 @@
 
 /* Hover Effects */
 .btn:hover {
-    transform: translateY(-1px);
-    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
+    transform: none;
+    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
 }
 
 .task-info-item:hover,

app/templates/tasks/my_tasks.html

@@ -545,8 +545,8 @@
 }
 
 .task-card .btn:hover {
-    transform: translateY(-1px);
-    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
+    transform: none;
+    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
 }
 
 /* Animation for stats cards */

app/templates/tasks/view.html

@@ -654,8 +654,8 @@
 [data-theme="dark"] .card.mobile-card .card-header h6 { color: #e5e7eb; }
 
 .btn:hover {
-    transform: translateY(-1px);
-    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
+    transform: none;
+    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
 }
 </style>
 <style>

templates/projects/create.html

@@ -358,8 +358,8 @@
 
 /* Hover Effects */
 .btn:hover {
-    transform: translateY(-1px);
-    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
+    transform: none;
+    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
 }
 
 .tip-item:hover {