body, html {
  height: 100%;
}

div.bg {
  /* The image used */
  background-image: url("bg.jpg");
  background-repeat: no-repeat;
  background-attachment: fixed; 
  background-size: 100% 100%;
  height: 100%;
}

div.tbox {
  max-width: 860px;
  padding: 20px 0;
  margin: auto;
  background-color: #ffffff;
  border: 1px solid black;
  opacity: 0.5;
}

table {
  border: 1px outset black; /* Outset black border */
}
th, td {
  border: 1px outset black; /* Outset black border */
  padding: 0.5rem; /* Optional: Add padding for content */
}