<style>
/* Contact Form Container */
#contactForm {
    max-width: 600px;
    margin: 40px auto;
    padding: 25px;
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Input & Textarea Styling */
#contactForm input[type="text"],
#contactForm input[type="email"],
#contactForm input[type="tel"],
#contactForm input[type="submit"],
#contactForm textarea {
    width: 100%;
    padding: 12px 15px;
    margin: 10px 0 20px 0;
    border: 1px solid #ccc;
    border-radius: 8px;
    box-sizing: border-box;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

/* On Focus */
#contactForm input:focus,
#contactForm textarea:focus {
    border-color: #28a745;
    outline: none;
}

/* Submit Button */
#contactForm input[type="submit"] {
    background-color: #28a745;
    color: white;
    border: none;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

#contactForm input[type="submit"]:hover {
    background-color: #218838;
}

/* Labels */
#contactForm label {
    font-weight: 600;
    margin-bottom: 5px;
    display: block;
    color: #333;
}

/* Responsive (Mobile) */
@media screen and (max-width: 600px) {
    #contactForm {
        padding: 20px;
    }

    #contactForm input[type="submit"] {
        font-size: 16px;
    }
}
</style>