Add mail message page style

style.css

@@ -1110,6 +1110,44 @@ body.mail .page-container table tr:nth-of-type(even) {
 	background: var(--mail-content-bg);
 }
 
+body.message .box {
+	padding: 0px;
+	margin: 0px;
+}
+
+body.message .box table {
+	border-collapse: separate;
+	margin: 0px;
+}
+
+body.message .box table th {
+	text-align: left;
+}
+
+body.message .box table tr.title-row {
+	font-size: 20px;
+	position: sticky;
+	top: 0px;
+}
+
+body.message .box table tr.title-row th {
+	background: var(--forum-sub);
+	border: var(--forum-sub-border);
+}
+
+body.message .box table tr.header-row {
+	background: var(--post);
+	border-left: var(--post-border); border-right: var(--post-border);
+}
+
+body.message .box table:first-of-type(tr.header_row) {
+	border-top: var(--post-border);
+}
+
+body.message .box table:last-of-type(tr.header_row) {
+	border-bottom: var(--post-border);
+}
+
 /* == FORUM */
 body.forum table.board-display {
 	background: var(--forum-header);