Enhance UI: differentiate button variants and improve project card accents

Co-authored-by: neilime <314088+neilime@users.noreply.github.com>

Author: Copilot

packages/theme/src/theme/hoverscape/HoverkraftButton.module.css

@@ -61,15 +61,17 @@
 }
 
 .secondary {
-  background: rgba(25, 152, 255, 0.08);
-  border: 2px solid rgba(25, 152, 255, 0.35);
+  background: rgba(25, 152, 255, 0.15);
+  border: 2px solid rgba(25, 152, 255, 0.5);
   color: var(--hk-color-dark, #1d2026);
+  box-shadow: 0 2px 8px rgba(25, 152, 255, 0.15);
 }
 
 .secondary:hover {
   transform: translateY(-2px);
-  background: rgba(25, 152, 255, 0.12);
-  border-color: rgba(25, 152, 255, 0.5);
+  background: rgba(25, 152, 255, 0.22);
+  border-color: rgba(25, 152, 255, 0.65);
+  box-shadow: 0 4px 12px rgba(25, 152, 255, 0.25);
   text-shadow: 0 3px 12px rgba(8, 43, 80, 0.35);
 }
 
@@ -86,13 +88,24 @@
   text-shadow: 0 3px 12px rgba(8, 43, 80, 0.35);
 }
 
-[data-theme="dark"] .secondary,
+[data-theme="dark"] .secondary {
+  background: rgba(25, 152, 255, 0.25);
+  border-color: rgba(25, 152, 255, 0.6);
+  color: #ffffff;
+  box-shadow: 0 2px 8px rgba(25, 152, 255, 0.2);
+}
+
+[data-theme="dark"] .secondary:hover {
+  background: rgba(25, 152, 255, 0.35);
+  border-color: rgba(25, 152, 255, 0.75);
+  box-shadow: 0 4px 12px rgba(25, 152, 255, 0.3);
+}
+
 [data-theme="dark"] .outline {
   color: #ffffff;
   border-color: rgba(255, 255, 255, 0.4);
 }
 
-[data-theme="dark"] .secondary:hover,
 [data-theme="dark"] .outline:hover {
   background: rgba(255, 255, 255, 0.12);
   border-color: rgba(255, 255, 255, 0.6);

packages/theme/src/theme/hoverscape/HoverkraftProjectCard.module.css

@@ -11,24 +11,53 @@
 
 .projectCard:hover {
   transform: translateY(-4px);
-  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
-  border-color: #1998ff;
 }
 
 .primary {
-  box-shadow: 0 4px 12px rgba(25, 152, 255, 0.08);
+  background: linear-gradient(135deg, rgba(25, 152, 255, 0.08) 0%, rgba(255, 90, 2, 0.06) 100%);
+  border-color: rgba(25, 152, 255, 0.3);
+  box-shadow: 0 4px 12px rgba(25, 152, 255, 0.15);
+}
+
+.primary:hover {
+  border-color: rgba(25, 152, 255, 0.5);
+  box-shadow: 0 12px 24px rgba(25, 152, 255, 0.2);
 }
 
 .neutral {
-  background: var(--ifm-color-content-secondary, #ffffff);
-  border-color: var(--ifm-color-emphasis-200);
+  background: #ffffff;
+  border-color: #cbd5e0;
+}
+
+.neutral:hover {
+  border-color: #a0aec0;
 }
 
 [data-theme="dark"] .projectCard {
   background: var(--ifm-background-surface-color);
   border-color: rgba(255, 255, 255, 0.14);
 }
 
+[data-theme="dark"] .primary {
+  background: linear-gradient(135deg, rgba(25, 152, 255, 0.15) 0%, rgba(255, 90, 2, 0.1) 100%);
+  border-color: rgba(25, 152, 255, 0.4);
+  box-shadow: 0 4px 12px rgba(25, 152, 255, 0.2);
+}
+
+[data-theme="dark"] .primary:hover {
+  border-color: rgba(25, 152, 255, 0.6);
+  box-shadow: 0 12px 24px rgba(25, 152, 255, 0.3);
+}
+
+[data-theme="dark"] .neutral {
+  background: rgba(255, 255, 255, 0.05);
+  border-color: rgba(255, 255, 255, 0.2);
+}
+
+[data-theme="dark"] .neutral:hover {
+  border-color: rgba(255, 255, 255, 0.3);
+}
+
 .projectHeader {
   display: flex;
   align-items: flex-start;