body {
    font-family: 'Arial', sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

form {
    background-color: #ffffff;
    padding: 20px 40px;
    border-radius: 5px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
    max-width: 500px;
    width: 100%;
}

.input-group {
    margin-bottom: 20px;
    position: relative;
}

label {
    display: block;
    margin-bottom: 5px;
    color: #555;
}

input[type="text"], 
input[type="email"], 
select {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 16px;
}

input[type="submit"] {
    background-color: #3498db;
    color: #ffffff;
    border: none;
    border-radius: 5px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

input[type="submit"]:hover {
    background-color: #2980b9;
}

.icon {
    position: absolute;
    top: 40px;
    right: 10px;
    font-size: 18px;
}

input:invalid {
    border-color: red;
}

input:valid {
    border-color: green;
}

@media screen and (max-width: 768px) {
    form {
        padding: 15px;
    }
    
    .input-group {
        margin-bottom: 15px;
    }
}