-table, tr, th, td { border: 1px solid black; }
-.day_row:nth-child(7n+2) { background-color: yellow; }
-.district_name { writing-mode: vertical-rl; transform: rotate(180deg); }
-</style><h1>Table of Berlin's Corona infection number development by districts</h1>
-<p>Updated daily at 9pm. <a href="https://plomlompom.com/repos/?p=berlin-corona-table">Source code</a>. <a href="berlin_corona.txt">Text view optimized for terminal curl</a>.</p>
+.day_row:nth-child(7n+3) > td { border-top: 1px solid black; }
+.vertical_header { writing-mode: vertical-rl; transform: rotate(180deg); font-weight: normal; }
+.fixed_head { position: sticky; top: 0; background-color: white; }
+.bold { font-weight: bold }
+</style>
+<title>Berlin's Corona infection numbers, development by districts</title>
+</head>
+<a href="/">home</a> · <a href="/contact.html">contact</a> · <a href="/privacy.html">privacy</a>
+<h1>Berlin's Corona infection numbers, development by districts</h1>
+<p>Updated daily at 9pm based on data from the "Senatsverwaltung für Gesundheit, Pflege und Gleichstellung". <a href="https://plomlompom.com/repos/?p=berlin-corona-table">Source code</a>. <a href="berlin_corona.txt">Text view optimized for terminal curl</a>.</p>