HTML - Problema formulario en tabletas

<?php

// define variables and set to empty values

$nameErr = $emailErr = $genderErr = $websiteErr = "";

$name = $email = $gender = $comment = $website = "";

if ($_SERVER["REQUEST_METHOD"] == "POST") {

  if (empty($_POST["name"])) {

    $nameErr = "Name is required";

  } else {

    $name = test_input($_POST["name"]);

  }

  if (empty($_POST["email"])) {

    $emailErr = "Email is required";

  } else {

    $email = test_input($_POST["email"]);

  }

  if (empty($_POST["website"])) {

    $website = "";

  } else {

    $website = test_input($_POST["website"]);

  }

  if (empty($_POST["comment"])) {

    $comment = "";

  } else {

    $comment = test_input($_POST["comment"]);

  }

  if (empty($_POST["gender"])) {

    $genderErr = "Gender is required";

  } else {

    $gender = test_input($_POST["gender"]);

  }

}

?>

<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">

Name: <input type="text" name="name">

<span class="error">* <?php echo $nameErr;?></span>

<br><br>

E-mail:

<input type="text" name="email">

<span class="error">* <?php echo $emailErr;?></span>

<br><br>

Website:

<input type="text" name="website">

<span class="error"><?php echo $websiteErr;?></span>

<br><br>

<label>Comment: <textarea name="comment" rows="5" cols="40"></textarea>

<br><br>

Gender:

<input type="radio" name="gender" value="female">Female

<input type="radio" name="gender" value="male">Male

<span class="error">* <?php echo $genderErr;?></span>

<br><br>

<input type="submit" name="submit" value="Submit">

</form>