Initial work at manual cleanup of Medium posts

custom.css

@@ -62,3 +62,28 @@ a.button {
 .bg-green {
     background: green;
 }
+* {
+  box-sizing: border-box;
+}
+/* This technique doesn't naturally cause horizontal overflow, but once there is natural vertical overflow, it causes horizontal overflow, so stopping here. */
+body {
+  overflow-x: hidden;
+}
+img { 
+  max-width: 100%; 
+}
+p, figure {
+  margin: 15px 0;
+}
+.full-width {
+  width: 100vw;
+  position: relative;
+  left: 50%;
+  right: 50%;
+  margin-left: -50vw;
+  margin-right: -50vw;
+}
+figcaption {
+  text-align: center;
+  color: #999;
+}