body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 500px;
    margin: 50px auto;
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 20px;
}

h2 {
    color: #27ae60;
    text-align: center;
    margin-bottom: 20px;
}

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

label {
    display: block;
    font-weight: bold;
    margin-bottom: 5px;
    color: #333;
}

input,
select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
}

input:focus,
select:focus {
    border-color: #27ae60;
    outline: none;
    box-shadow: 0 0 5px rgba(39, 174, 96, 0.5);
}

.btn-primary {
    background-color: #27ae60;
    color: #ffffff;
    border: none;
    padding: 10px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    width: 100%;
}

.btn-primary:hover {
    background-color: #219150;
}

.invalid-feedback {
    color: red;
    font-size: 12px;
    margin-top: 5px;
}

a {
    color: #27ae60;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

p {
    text-align: center;
    margin-top: 10px;
    font-size: 14px;
}

@media (max-width: 600px) {
    .container {
        max-width: 95%;
        margin: 20px auto;
        padding: 10px;
    }

    h2 {
        font-size: 22px;
    }

    input,
    select {
        font-size: 16px;
        padding: 12px;
    }

    .btn-primary {
        font-size: 18px;
        padding: 12px;
    }

    p {
        font-size: 13px;
    }
}

@media (max-width: 400px) {
    .container {
        padding: 5px;
    }

    h2 {
        font-size: 18px;
    }

    .btn-primary {
        font-size: 16px;
        padding: 10px;
    }
}