body {
  background-image: url("background1.png");
  background-repeat: no-repeat;
  background-position: center center; /* Optional: Center the image */
  background-attachment: cover; /* Optional: Fix the image position during scroll */
}



tr:nth-child(even) {
  background-color: #dbf5ff;
}
tr:nth-child(odd) {
  background-color: #ffdbed;
}
tr:hover {background-color: #c5ffcb;}
table, th, td {
  border: 1px solid black;
  border-collapse: collapse;
}

table.center {
  margin-left: auto; 
  margin-right: auto;
  
   table, th, td {
            border: 1px solid black;
            border-collapse: collapse;
            padding: 8px;
        }
        input[type="number"] {
            width: 80px;
        }