body {
    background-color: #f8f9fa;
}

.container {
    max-width: 600px;
    margin-top: 50px;
}

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

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

.btn {
    width: 100%;
}

.form-text {
    margin-top: 5px;
}