add play button for gallery

_sass/_isabelline.scss

@@ -252,7 +252,7 @@ main {
 				cursor: pointer;
 				border-radius: 6px;
 				display: none;
-				transition: all .3s ease;
+				transition: all 300ms ease;
 			}
 			
 			img:first-child {
@@ -271,13 +271,44 @@ main {
 				width: 1rem;
 				height: 1rem;
 				border-radius: .5rem;
-				transition: all .3s ease;
+				transition: all 300ms ease;
 				background-color: hsl($hue,10,80);
 				&.selected {
 					background-color: hsl($hue,50,40);
 				}
 			}
+			.play {
+				label {
+					margin: .5rem;
+
+					display: inline-block;
+
+					box-sizing: border-box;
+
+					width: 0;
+					height: .5rem;
+
+					cursor: pointer;
+
+					border-color: transparent transparent transparent #202020;
+					transition: 300ms all ease;
+					will-change: border-width;
+
+					// paused state
+					border-style: double;
+					border-width: 0 0 0 .5rem;
+				}
+				input[type='checkbox'] {
+					visibility: hidden;
+					&:checked + label {
+						border-style: solid;
+						border-width: .3rem 0 .3rem .5rem;
+					}
+				}
+			}
 		}
+
+
 	}
 
 	div.gallery + p {