Enhance leaderboard styling with new title filter and time filter components

Author: iitzIrFan

src/components/dashboard/LeaderBoard/leaderboard.css

@@ -54,10 +54,19 @@
   margin-bottom: 40px;
 }
 
+.title-filter-container {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  flex-wrap: wrap;
+  gap: 16px;
+  margin-bottom: 24px;
+}
+
 .top-performers-title {
   font-size: 24px;
   font-weight: 700;
-  margin-bottom: 24px;
+  margin: 0;
 }
 
 .light .top-performers-title {
@@ -68,6 +77,27 @@
   color: #f1f1f1;
 }
 
+.top-title-filter {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  min-width: 240px;
+}
+
+.filter-label {
+  font-size: 14px;
+  font-weight: 600;
+  white-space: nowrap;
+}
+
+.light .filter-label {
+  color: #4b5563;
+}
+
+.dark .filter-label {
+  color: #d1d5db;
+}
+
 .top-performers-grid {
   display: grid;
   grid-template-columns: 1fr 1fr 1fr;
@@ -307,29 +337,87 @@
   border: 1px solid #444;
 }
 
+.time-filter-wrapper {
+  position: relative;
+  min-width: 180px;
+}
+
+@keyframes select-pulse {
+  0% { border-color: #6366f1; box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4); }
+  70% { border-color: #6366f1; box-shadow: 0 0 0 6px rgba(99, 102, 241, 0); }
+  100% { border-color: inherit; }
+}
+
+.time-filter-select.highlight-change {
+  animation: select-pulse 1.2s ease-out;
+}
+
+.time-filter-wrapper::after {
+  content: '';
+  position: absolute;
+  right: 15px;
+  top: 50%;
+  transform: translateY(-50%);
+  width: 0;
+  height: 0;
+  border-left: 6px solid transparent;
+  border-right: 6px solid transparent;
+  border-top: 6px solid #6366f1;
+  pointer-events: none;
+  transition: transform 0.2s ease;
+}
+
+.time-filter-wrapper:hover::after {
+  transform: translateY(-50%) translateY(2px);
+}
+
 .time-filter-select {
   width: 100%;
-  padding: 12px;
-  border-radius: 8px;
-  font-size: 16px;
+  padding: 12px 40px 12px 18px;
+  border-radius: 12px;
+  font-size: 15px;
+  font-weight: 600;
+  letter-spacing: 0.3px;
   appearance: none;
-  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
-  background-repeat: no-repeat;
-  background-position: right 12px center;
-  background-size: 16px;
+  background: linear-gradient(to bottom, rgba(255,255,255,0.05) 0%, rgba(0,0,0,0.05) 100%);
   cursor: pointer;
+  transition: all 0.25s ease;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
+  border: 2px solid transparent;
+}
+
+.time-filter-select:hover {
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
+  transform: translateY(-2px);
+  background-position: right 15px center;
+}
+
+.time-filter-select:focus {
+  outline: none;
+  border-color: #6366f1;
+  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
 }
 
 .light .time-filter-select {
   background-color: #fff;
-  border: 1px solid #e2e8f0;
   color: #333;
+  border: 2px solid #e5e7eb;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
+}
+
+.light .time-filter-wrapper::after {
+  border-top-color: #6366f1;
 }
 
 .dark .time-filter-select {
-  background-color: #2b303b;
-  border: 1px solid #444;
+  background-color: #2d3748;
   color: #f1f1f1;
+  border: 2px solid #4b5563;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
+}
+
+.dark .time-filter-wrapper::after {
+  border-top-color: #8b5cf6;
 }
 
 /* Contributors List */