body{
  font-family: Arial, sans-serif;
  background:#f5f5f5;
  padding:20px;
  text-align:center;
}

h2{
  margin: 0 0 12px 0;
}

table{
  border-collapse: collapse;
  background:#fff;
  margin-left:auto;
  margin-right:auto;
}

.panel{
  width:100%;
  border:1px solid #aaa;
  margin: 0 auto 14px auto;
}

.panel th{
  background:#eaeaea;
  padding:8px;
  text-align:center;
}

.panel td{
  padding:6px;
  text-align:center;
}

.zoznam{
  width:100%;
  border:1px solid #aaa;
  margin-left:auto;
  margin-right:auto;
}

.zoznam th,
.zoznam td{
  border:1px solid #ccc;
  padding:6px;
  text-align:center;
}

input,
select{
  width:100%;
  padding:4px;
  margin-left:auto;
  margin-right:auto;
  display:block;
}

button{
  padding:6px 10px;
}

a{
  text-decoration:none;
}

.chyba{
  color:red;
  font-weight:bold;
  text-align:center;
}