body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #f0f2f5;
  color: #333;
  padding: 20px;
  margin: 0;
}

.container {
  max-width: 500px;
  margin: 60px auto;
  background: #fff;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

h1, h2 {
  text-align: center;
  color: #2c3e50;
}

form {
  margin-top: 20px;
}

input[type="text"],
input[type="password"],
input[type="number"],
select {
  width: 100%;
  padding: 12px;
  margin: 12px 0;
  border: 1px solid #ccc;
  border-radius: 6px;
  box-sizing: border-box;
  font-size: 16px;
}

input[type="submit"],
button {
  width: 100%;
  padding: 12px;
  background-color: #3498db;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

input[type="submit"]:hover,
button:hover {
  background-color: #2980b9;
}

a {
  display: block;
  text-align: center;
  margin-top: 20px;
  color: #3498db;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.error {
  color: red;
  font-size: 14px;
  margin-bottom: 10px;
  text-align: center;
}