* {
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #f5f7fa;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  background: white;
  padding: 20px;
  border-radius: 10px;
  width: 90%;
  max-width: 400px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

h2 {
  text-align: center;
  margin-bottom: 20px;
}

form input, button {
  width: 100%;
  padding: 10px;
  margin: 8px 0;
  border-radius: 5px;
  border: 1px solid #ccc;
}

button {
  background: #007bff;
  color: white;
  border: none;
  cursor: pointer;
}

button:hover {
  background: #0056b3;
}

table {
  width: 100%;
  margin-top: 20px;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  padding: 8px;
  border-bottom: 1px solid #eee;
}

.message {
  margin-top: 20px;
  padding: 10px;
  background: #e8f5e9;
  border-left: 5px solid orange;
}

@media (max-width: 480px) {
  .container {
    padding: 15px;
  }
}