diff --git a/css/modal.css b/css/modal.css
new file mode 100644
index 0000000..befefd2
--- /dev/null
+++ b/css/modal.css
@@ -0,0 +1,43 @@
+.modal {
+	position: fixed;
+	left: 0;
+	top: 0;
+	width: 100%;
+	height: 100%;
+	background-color: rgba(0, 0, 0, 0.5);
+	opacity: 0;
+	visibility: hidden;
+	transform: scale(1.1);
+	transition: visibility 0s linear 0.25s, opacity 0.25s 0s, transform 0.25s;
+}
+.modal-content {
+	position: absolute;
+	top: 50%;
+	left: 50%;
+	transform: translate(-50%, -50%);
+	background-color: white;
+	padding: 1rem 1.5rem;
+	width: 15rem;
+	border-radius: 0.5rem;
+}
+.modal-content img {
+	width: 14.5rem;
+}
+.close-button {
+	float: right;
+	width: 1.5rem;
+	line-height: 1.5rem;
+	text-align: center;
+	cursor: pointer;
+	border-radius: 0.25rem;
+	background-color: lightgray;
+}
+.close-button:hover {
+	background-color: darkgray;
+}
+.show-modal {
+	opacity: 1;
+	visibility: visible;
+	transform: scale(1.0);
+	transition: visibility 0s linear 0s, opacity 0.25s 0s, transform 0.25s;
+}