body {
  font-family: monospace;
  background: #111;
  color: #ddd;
  padding: 20px;
}
h1, h2 { color: #6cf; }
a { color: #6cf; text-decoration: none; }
a:hover { text-decoration: underline; }
ul { list-style: none; padding: 0; }
li { margin: 5px 0; }
pre {
  background: #000;
  border: 1px solid #333;
  padding: 10px;
  height: 70vh;
  overflow-y: auto;
}
.error { color: #f66; font-weight: bold; }
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}
td, th {
  border: 1px solid #333;
  padding: 5px;
}
input {
  background: #222;
  color: #ddd;
  border: 1px solid #444;
  padding: 4px;
  width: 95%;
}
button {
  background: #6cf;
  color: #111;
  border: none;
  padding: 5px 10px;
  cursor: pointer;
}
button:hover {
  background: #8ef;
}