Update style.css

style.css

@@ -1,28 +1,76 @@
+* {
+    box-sizing: border-box;
+    padding: 0;
+    margin: 0;
+    font-family: sans-serif;
+}
+
+html,
+body {
+    height: 100%;
+}
+
 body {
-	padding: 2rem;
-	font-family: -apple-system, BlinkMacSystemFont, "Arial", sans-serif;
+    padding: 32px;
+}
+
+body,
+#container {
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+}
+
+#container {
+    position: relative;
+    gap: 0.4rem;
+
+    width: 640px;
+    height: 640px;
+    max-width: 100%;
+    max-height: 100%;
+
+    border: 2px dashed #D1D5DB;
+    border-radius: 0.75rem;
+    overflow: hidden;
+    cursor: pointer;
+    margin: 1rem;
+
+    background-size: 100% 100%;
+    background-position: center;
+    background-repeat: no-repeat;
+    font-size: 18px;
+}
+
+#upload {
+    display: none;
+}
+
+svg {
+    pointer-events: none;
 }
 
-h1 {
-	font-size: 16px;
-	margin-top: 0;
+#example {
+    font-size: 14px;
+    text-decoration: underline;
+    cursor: pointer;
 }
 
-p {
-	color: rgb(107, 114, 128);
-	font-size: 15px;
-	margin-bottom: 10px;
-	margin-top: 5px;
+#example:hover {
+    color: #2563EB;
 }
 
-.card {
-	max-width: 620px;
-	margin: 0 auto;
-	padding: 16px;
-	border: 1px solid lightgray;
-	border-radius: 16px;
+.bounding-box {
+    position: absolute;
+    box-sizing: border-box;
+    border: solid 2px;
 }
 
-.card p:last-child {
-	margin-bottom: 0;
+.bounding-box-label {
+    color: white;
+    position: absolute;
+    font-size: 12px;
+    margin: -16px 0 0 -2px;
+    padding: 1px;
 }