fix visual bugs + enhance sections + revise project orders

public/css/projects.css

@@ -84,6 +84,10 @@
     gap: 18px;
 }
 
+.content-card.is-hidden {
+    display: none;
+}
+
 .updates-grid {
     grid-template-columns: 1fr;
 }
@@ -96,6 +100,7 @@
     display: flex;
     flex-direction: column;
     min-height: 100%;
+    scroll-margin-top: 96px;
 }
 
 .content-card.featured {
@@ -180,6 +185,29 @@
     filter: brightness(1.04);
 }
 
+.projects-toggle-shell {
+    display: flex;
+    justify-content: center;
+    margin-top: 20px;
+}
+
+.projects-toggle {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    border-radius: 999px;
+    border: 1px solid var(--border);
+    padding: 12px 18px;
+    font-weight: 600;
+    background: rgba(255, 255, 255, 0.03);
+    color: var(--primary);
+}
+
+.projects-toggle:hover {
+    border-color: rgba(235, 82, 52, 0.32);
+    color: var(--secondary);
+}
+
 .updates-grid .content-card {
     background: linear-gradient(
         180deg,