<form action="sendmail.php" method="POST">
    <div class="row">
        <div class="col-12 col-sm-12 col-md-12 col-lg-12 col-xl-12 col-xxl-12">
            <div class="input-main">
                <label>Name</label>
                <input type="text" class="form-control" placeholder="Name" name="name" required>
            </div>
        </div>
        <div class="col-12 col-sm-12 col-md-12 col-lg-12 col-xl-12 col-xxl-12">
            <div class="input-main">
                <label>Email</label>
                <input type="email" class="form-control" placeholder="Email" name="email" required>
            </div>
        </div>
        <div class="col-12 col-sm-12 col-md-12 col-lg-12 col-xl-12 col-xxl-12">
            <div class="input-main">
                <label>Phone</label>
                <input type="tel" class="form-control" minlength="11" maxlength="11" placeholder="Phone" name="phone"
                    required>
            </div>
        </div>
        <div class="col-12 col-sm-12 col-md-12 col-lg-12 col-xl-12 col-xxl-12">
            <div class="input-main">
                <label>Message</label>
                <textarea class="form-control" rows="5" name="message" placeholder="Message" required></textarea>
            </div>
        </div>
        <div class="col-12 col-sm-12 col-md-12 col-lg-12 col-xl-12 col-xxl-12">
            <div class="btn-box">
                <button type="submit" class="designBtn btn-wh">Submit</button>
            </div>
        </div>
    </div>
</form>