body {
  font-family: Arial, sans-serif;
  background: #121212;
  color: #eee;
  text-align: center;
  margin: 0;
  padding: 0;
}

header {
  background: #1e1e1e;
  padding: 20px;
  box-shadow: 0 0 10px #000;
}

a { color: #00bcd4; text-decoration: none; }

.login-container {
  width: 300px;
  margin: 100px auto;
  padding: 20px;
  background: #1f1f1f;
  border-radius: 8px;
  box-shadow: 0 0 10px #000;
}

.login-container input {
  width: 90%;
  padding: 10px;
  margin: 8px 0;
  border: none;
  border-radius: 5px;
}

button {
  background: #00bcd4;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  cursor: pointer;
}

button:hover { background: #0097a7; }

.error { color: #ff5252; }

table.module-table {
  margin: 20px auto;
  border-collapse: collapse;
  width: 80%;
  color: #eee;
}
table.module-table th, table.module-table td {
  border: 1px solid #333;
  padding: 8px;
}
table.module-table th {
  background: #222;
}