body {
    font-family: Arial, sans-serif;
    background: #f2f2f2;
    margin: 0;
    padding: 0;
}

h2 {
    text-align: center;
    margin-top: 30px;
    color: #333;
}

form {
    background: #fff;
    width: 300px;
    margin: 40px auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 6px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-size: 14px;
    color: #444;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 8px;
    margin-bottom: 15px;
    border: 1px solid #aaa;
    border-radius: 4px;
    box-sizing: border-box;
}

input[type="submit"] {
    width: 100%;
    padding: 10px;
    background: #4e73df;
    border: none;
    border-radius: 4px;
    color: #fff;
    font-size: 14px;
    cursor: pointer;
}

input[type="submit"]:hover {
    background: #2e59d9;
}

.error {
    color: red;
    font-size: 13px;
    text-align: center;
    margin-bottom: 10px;
}