hjälp html/css + hobbyknåpande php noob

css

.slideshow
{ width: 940px;
height: 627px;
float: center;
margin-left: 0 auto;}

/* styling for the slideshow on the homepage */
ul.slideshow {
list-style: none;
width: 940px;
height: 627px;
overflow: hidden;
position: relative;
margin: 0;}

ul.slideshow li {
position: absolute;
margin: 0;
padding: 50px;
left: 0;
right: 0;}

ul.slideshow li.show {
z-index: 500;}

ul img {
border: none;}

‪#‎slideshow‬-caption {
width: 840px;
height: 38px;
position: absolute;
bottom: 0;
left: 0;
z-index: 500;}

#slideshow-caption .slideshow-caption-container {
padding: 10px 25px 10px 25px;
background: transparent url(../images/transparent.png) repeat;
z-index: 1000;}

#slideshow-caption p {
padding: 0;
font: normal 130% arial, sans-serif;
color: ‪#‎FFF‬;
text-shadow: 1px 1px #000;}
text-shadow: 1px 1px #000;}

html

<div class="Slideshow">
<ul class="slideshow">
<li class="show"><img width="840" height="527" src="images/Slideshow/cane.jpg" alt="Testbild 1" /></li>
<li><img height="527" src="images/Slideshow/IMG_1289.png" alt="testbild 2" /></li>
<li><img width="840" height="527" src="images/Slideshow/studio_lamptest HDR.png" alt="testbild 3" /></li>
</ul>
</div>

php

<?php
$name = $_POST['name'];
$email = $_POST['email'];
$message = $_POST['message'];
$from = 'From: xxx';
$to = 'xxx@gmail.com';
$subject = 'Hello';
$human = $_POST['human'];

$body = "From: $name\n E-Mail: $email\n Message:\n $message";

if ($_POST['submit'] && $human == '4') {
if (mail ($to, $subject, $body, $from)) {
echo '<p>Your message has been sent!</p>';
} else {
echo '<p>Something went wrong, go back and try again!</p>';
}
} else if ($_POST['submit'] && $human != '4') {
echo '<p>You answered the anti-spam question incorrectly!</p>';
}
?>

html

<form method="post" action="index.php">

<label>Name</label>
<input name="name" placeholder="Type Here">

<label>Email</label>
<input name="email" type="email" placeholder="Type Here">

<label>Message</label>
<textarea name="message" placeholder="Type Here"></textarea>

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

</form>