body { background: white; color:black }

h1 { font-weight: bold; text-align: center; margin: 20}
h2 { font-weight: bold; left-margin: 10%}

.avertissement { font-style: italic }

.explication { font-size:large; color: #000066; margin: 20; vertical-align: middle}

applet { text-align: center }

a:link { color: #6699FF }

a:visited { color: #9933FF }

img {  vertical-align: bottom }