body {
  font-family: system-ui, sans-serif;
  background-color: #f2f2f2;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  width: 90%;
  max-width: 600px;
}

h1 {
  text-align: center;
  color: #333;
}

.hidden {
  display: none;
}

.error {
  color: red;
  text-align: center;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

th,
td {
  padding: 0.6rem;
  border-bottom: 1px solid #ddd;
  text-align: left;
}

th {
  background: #007acc;
  color: white;
}