feat: integrate AI-driven selection panel with context-aware text summarization and quiz generation features.

src/NexusReader.UI.Shared/Components/Organisms/ReaderCanvas.razor.css

@@ -3,10 +3,64 @@
     margin: 0 auto;
     padding: 2rem 1rem;
     transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
+    position: relative;
 }
 
 .reader-flow-container {
     display: flex;
     flex-direction: column;
     gap: 1.5rem;
+    position: relative;
+}
+
+.block-wrapper {
+    transition: all 0.5s ease;
+    border-radius: 8px;
+    padding: 8px;
+    border: 1px solid transparent;
+}
+
+.block-wrapper.highlighted {
+    background: rgba(0, 243, 255, 0.08);
+    box-shadow: 0 0 20px rgba(0, 243, 255, 0.15);
+    border-color: #00f3ff;
+    transform: scale(1.01);
+}
+
+.ai-sparkle-trigger {
+    display: inline-flex;
+    align-items: center;
+    gap: 0.5rem;
+    padding: 0.5rem 1rem;
+    background: rgba(18, 18, 18, 0.6);
+    border: 1px solid rgba(0, 255, 153, 0.3);
+    border-radius: 20px;
+    cursor: pointer;
+    margin: 1rem 0;
+    transition: all 0.3s ease;
+    position: relative;
+}
+
+.ai-sparkle-trigger:hover {
+    background: rgba(0, 255, 153, 0.1);
+    border-color: #00ff99;
+    transform: translateY(-2px);
+}
+
+.sparkle-tooltip {
+    font-size: 0.75rem;
+    color: #fff;
+    opacity: 0.7;
+}
+
+.neon-pulse {
+    color: #00ff99;
+    filter: drop-shadow(0 0 5px #00ff99);
+    animation: pulse-small 2s infinite;
+}
+
+@keyframes pulse-small {
+    0% { transform: scale(1); opacity: 1; }
+    50% { transform: scale(1.1); opacity: 0.8; }
+    100% { transform: scale(1); opacity: 1; }
 }