body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  background-color: #f5f7fa;
}

.container {
  background: #fff;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  color: #2c3e50;
  margin-bottom: 30px;
  font-size: 28px;
}

h2 {
  color: #3498db;
  font-size: 20px;
  margin-top: 20px;
  margin-bottom: 15px;
}

.login-form {
  max-width: 400px;
  margin: 0 auto;
  background: white;
  padding: 20px;
  border-radius: 5px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.form-group {
  margin-bottom: 15px;
}

label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
  color: #444;
}

input, button {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  box-sizing: border-box;
  font-size: 14px;
}

input:focus {
  border-color: #3498db;
  outline: none;
  box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

button {
  background: #4CAF50;
  color: white;
  border: none;
  cursor: pointer;
  font-weight: bold;
  margin-top: 10px;
  transition: background-color 0.2s;
}

button:hover {
  background: #45a049;
}

.error {
  color: #f44336;
  margin-top: 5px;
  font-size: 12px;
}