CourseHub: AJAX video course player (PHP + MySQL + Bootstrap + Plyr)

Scans nested course folders for mp4s, tracks per-user resume position
and per-folder progress. SPA frontend with hash routing over a JSON API;
range-request streaming via stream.php.

assets/style.css

@@ -0,0 +1,24 @@
+.card-hover {
+  transition: transform 0.12s ease, border-color 0.12s ease;
+}
+.card-hover:hover {
+  transform: translateY(-2px);
+  border-color: var(--bs-primary);
+}
+
+.progress-thin {
+  height: 6px;
+}
+
+.playlist-scroll {
+  max-height: 60vh;
+  overflow-y: auto;
+}
+
+.min-w-0 {
+  min-width: 0;
+}
+
+:root {
+  --plyr-color-main: var(--bs-primary);
+}