html  {
    text-align: center;
}
body {
    max-width: 50em;
    margin: 0 auto;
}
[show=false] { display: none; }
hr { margin: 1em 0; }

buttons {
    display: block;
    margin: 1em auto;
}
button { margin: 1em 2em; }
button:hover { cursor: pointer; }
button[enable=false] { opacity: 0.5; }
button[enable=false]:hover { cursor: none; }

parameters { display: flex; justify-content: space-around; margin: 1em 0; }
  
note { font-size:0.7em; }
a { color: blue; text-decoration: underline; }
a:hover { cursor: pointer; }

input-share { display: block; }
input.number { width: 2em; }
error { color: red; }
warning { color: #004080; font-size: 0.7em; }