Enhance birthday feature: add garland decoration, improve balloon pop confetti effect, and refine animation dynamics

Jellyfin.Plugin.Seasonals/Web/birthday.css

@@ -10,6 +10,23 @@
     contain: strict;
 }
 
+.birthday-garland {
+    position: absolute;
+    top: -1vh;
+    left: 0;
+    width: 100vw;
+    z-index: 55;
+    pointer-events: none;
+    /* optional: a little drop shadow for depth */
+    filter: drop-shadow(0 5px 8px rgba(0,0,0,0.5));
+}
+
+.birthday-garland img {
+    width: 100%;
+    height: auto;
+    object-fit: cover;
+}
+
 .birthday-cake {
     position: absolute;
     bottom: 2vh;
@@ -18,6 +35,7 @@
     font-size: 8rem;
     z-index: 50;
     filter: drop-shadow(0 0 10px rgba(255,255,255,0.4));
+    pointer-events: auto;
 }
 
 .birthday-cake img {
@@ -34,6 +52,13 @@
     font-size: 3rem;
     opacity: 0.95;
     z-index: 40;
+    pointer-events: none; /* Container itself should not block clicks */
+}
+
+.birthday-inner {
+    pointer-events: auto; /* Allow hover over the actual item */
+    cursor: crosshair;
+    display: inline-block;
 }
 
 .birthday-symbol img {
@@ -88,3 +113,50 @@
         opacity: 0;
     }
 }
+
+@keyframes birthday-sway {
+    0% { transform: rotate(-8deg) translateX(-5%); }
+    100% { transform: rotate(8deg) translateX(5%); }
+}
+
+@keyframes birthday-pop {
+    0% { transform: scale(1); opacity: 1; filter: brightness(1); }
+    30% { transform: scale(1.3); opacity: 1; filter: brightness(1.5); }
+    100% { transform: scale(0); opacity: 0; filter: brightness(2); }
+}
+
+.birthday-burst-confetti {
+    position: absolute;
+    pointer-events: none;
+    z-index: 1000;
+    will-change: transform, opacity;
+    animation: birthday-burst-fall 1.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
+}
+
+.birthday-burst-confetti.circle {
+    border-radius: 50%;
+}
+
+.birthday-burst-confetti.triangle {
+    width: 0;
+    height: 0;
+    background-color: transparent !important;
+    border-left: 5px solid transparent;
+    border-right: 5px solid transparent;
+    border-bottom: 10px solid var(--shape-color, #ff0000);
+}
+
+@keyframes birthday-burst-fall {
+    0% {
+        transform: translate(0, 0) rotate3d(var(--rx), var(--ry), var(--rz), 0deg);
+        opacity: 1;
+    }
+    30% {
+        transform: translate(var(--burst-x), var(--burst-y)) rotate3d(var(--rx), var(--ry), var(--rz), calc(var(--rot-dir) * 0.3));
+        opacity: 1;
+    }
+    100% {
+        transform: translate(var(--burst-x), calc(var(--burst-y) + 150px)) rotate3d(var(--rx), var(--ry), var(--rz), var(--rot-dir));
+        opacity: 0;
+    }
+}