h1 {background-color:lightblue; padding:3px; border:solid; border-color:black;}
h2 {text-decoration: underline;}
h4 {text-decoration: underline; text-decoration-color: black; background-color:lightblue; color:black;}
body {background-color:aliceblue;}
p {background-color:whitesmoke;  padding:10px; margin:5px; border:solid; border-color:beige;}
ul {border: 2px solid black;padding-top: 10px; padding-bottom: 10px;}
.Navi{color: tomato;}
a {color:blue; text-decoration: none;}
a:visited  { color: blueviolet; text-decoration: none; }
a:hover    { text-decoration: none; color: darkorange; }
a:active   { background-color: black; color: white; }
img {padding:none; border: solid; border-color: darkslategrey;}