fix dropdown issues and apply button

static/style.css

@@ -220,7 +220,7 @@ nav {
 /* ---- Filters ---- */
 .filters {
   display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
+  grid-template-columns: repeat(5, 1fr);
   gap: 1rem;
   margin-bottom: 2rem;
   padding-bottom: 1.5rem;
@@ -342,8 +342,9 @@ nav {
 }
 
 .apply-btn {
-  width: 100%;
-  padding: 0.5rem 1.2rem;
+  grid-column: 1 / -1;
+  justify-self: start;
+  padding: 0.5rem 2rem;
   background: var(--accent);
   color: var(--bg-panel);
   border: none;
@@ -436,8 +437,10 @@ nav {
   .charts-grid { grid-template-columns: 1fr; }
   .chart-container.full-width { grid-column: span 1; }
   .filter-group { min-width: unset; }
-  .filters { grid-template-columns: 1fr 1fr; }
-  .apply-btn { grid-column: span 2; }
+  .filters {
+    grid-template-columns: 1fr 1fr;
+  }
+  .apply-btn { grid-column: 1 / -1; }
   .theme-toggle { width: 20px; height: 20px; bottom: 1rem; right: 0.9rem; }
 }
 
@@ -445,6 +448,8 @@ nav {
   .nav-brand .brand-sub { display: none; }
   .nav-brand .brand-sep { display: none; }
   .dashboard { padding: 1rem; }
-  .filters { grid-template-columns: 1fr; }
+  .filters {
+    grid-template-columns: 1fr;
+  }
   .apply-btn { grid-column: span 1; }
 }