body{
  margin: 0 auto;
  padding: 2ch;
  max-width: 84ch;
} 
table {
  border-collapse: collapse;
}
th, td {
  border: 1px solid #ddd;
  padding: 10px;
}
header{
  padding-bottom: 0.3rem; 
  margin-bottom: 0.3rem;
}
#generovat{
  visibility: hidden;
}

details{
  margin-bottom: 0.3rem;
}

pre{
  font-family: monospace,monospace;
}

#tabulka{
  margin-top: 1rem;
}
.error{background-color: red;}