html, body {
  margin: 0;
  height: 100%;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-around;
}

/* Table styles */

table {
  border-collapse: collapse;
}

th, td {
  border: 1px solid #ddd;
  text-align: left;
}

th {
  background: #f0f0f0;
  padding: 0.5rem;
}

td {
  padding: 0 0.5em;
}

tr.selected {
  background: #e0f7fa;
  background-color: #cce5ff; 
}

/* Buttons */

button {
  background: #eee;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  border-radius: 4px;
}

button:hover {
  background: #ddd;
}

/* Link back */

a {
  display: inline-block;
  margin-top: 0.5rem;
  text-decoration: none;
  color: #0077cc;
}

a:hover {
  text-decoration: underline;
}

hr {
  border-top: 1px solid #bbb;
}