body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f4f4f4;
}
.container {
  background: #fff;
  padding: 20px;
  margin: 40px auto;
  width: 80%;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
h1 { text-align: center; }
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}
table, th, td { border: 1px solid #ccc; }
th, td { padding: 10px; text-align: left; }
.success { color: green; }
.error { color: red; }
.logo {
  display: block;
  margin: 0 auto 20px auto;
  height: 80px;
}