body {
    font-family: Arial;
    background: #f3f3f3;
}
.login-form {
    width: 320px;
    margin: 50px auto;
    padding: 20px;
    background: #fff;
    border: 1px solid #000;
}

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

.form-group label {
    display: block;
    font-weight: bold;
    margin-bottom: 5px;
}

.form-group input,
.login-form input[type="submit"] {
    width: 100%;
    padding: 8px;
    box-sizing: border-box;
}

.form-group input {
    border: 1px solid #ccc;
    border-radius: 5px;
}

.login-form input[type="submit"] {
    padding: 10px;
    background: #15b000;
    color: #000000;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 17px;
}

.login-form input[type="submit"]:hover {
    background: #0a6c12;
}