html    { background:black; color:aqua; text-align:center; }
svg     { background:black;}
h1      { display:inline; font-size:2vw;}
.ts     { font-size:70%;}
#actual { width:640px; margin:auto;}
#foot   { position:fixed; text-align:center; bottom:0px; width:100%;}
button  { width:50%; height:36px;}