Develop Frontend Components for Project, Package, and Instance Views

frontend/src/components/Card.css

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+/* Card Component */
+.card {
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-lg);
+  padding: 24px;
+  transition: all var(--transition-normal);
+}
+
+.card--elevated {
+  box-shadow: var(--shadow-md);
+}
+
+.card--accent {
+  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(5, 150, 105, 0.05) 100%);
+  border: 1px solid rgba(16, 185, 129, 0.2);
+}
+
+.card--clickable {
+  display: block;
+  color: inherit;
+  position: relative;
+  overflow: hidden;
+  cursor: pointer;
+}
+
+.card--clickable::before {
+  content: '';
+  position: absolute;
+  inset: 0;
+  background: var(--accent-gradient);
+  opacity: 0;
+  transition: opacity var(--transition-normal);
+  border-radius: var(--radius-lg);
+}
+
+.card--clickable:hover {
+  border-color: var(--border-secondary);
+  transform: translateY(-2px);
+  box-shadow: var(--shadow-lg);
+  color: inherit;
+}
+
+.card--clickable:hover::before {
+  opacity: 0.03;
+}
+
+.card__header {
+  margin-bottom: 16px;
+}
+
+.card__header h3 {
+  color: var(--text-primary);
+  font-size: 1.125rem;
+  font-weight: 600;
+  margin-bottom: 4px;
+}
+
+.card__header p {
+  color: var(--text-secondary);
+  font-size: 0.875rem;
+  line-height: 1.5;
+}
+
+.card__body {
+  color: var(--text-secondary);
+  font-size: 0.875rem;
+}
+
+.card__footer {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  font-size: 0.75rem;
+  padding-top: 16px;
+  border-top: 1px solid var(--border-primary);
+  margin-top: 16px;
+}