html, body { height: 100%; width: 100%; font-family: sans-serif; }
html, body, iframe { border: 0px; margin: 0px; padding: 0px; }

.chv { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); }

.ke2-hidden { display: none; }

#list  { padding: 4px 4px; }

button { font-weight: bold; padding: 4px 8px; margin: 0; border-radius: 2px; border: 1px solid; opacity: .8; outline: none; }
button:hover  { opacity: 1; }
button:focus  { opacity: 1; border-left: 3px solid orange; }
button:active { transform: scale(.9); -webkit-transform: scale(.9); }
::-moz-focus-inner { border: 0; }

*     { transition: all 0.2s; }
input { transition: border 0.2s; }