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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">  
<link rel="stylesheet" href="cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

.navbar {
width: 100%;
background-color: #555;
overflow: auto;
}

.navbar a {
float: left;
padding: 12px;
color: white;
text-decoration: none;
font-size: 17px;
}

.navbar a:hover {
background-color: #000;
}

.active {
background-color: #4CAF50;
}
 <div class="navbar">
<a class="active" href="#"><i class="fa fa-fw fa-home"></i>Domů</a>
<a href="#"><i class="fa fa-fw fa-envelope"></i> Kontakt</a>
<a href="#"><i class="fa fa-fw fa-table"></i> Odkazy</a>
<a href="#"><i class="fa fa-fw fa-search"></i> Hledat</a>
</div>

@media screen and (max-width: 500px) {
.navbar a {
float: none;
display: block;
}
}

* {box-sizing: border-box}
.mySlides {display: none}
img {vertical-align: middle;}

/* Slideshow container */
.slideshow-container {
max-width: 1000px;
position: relative;
margin: auto;
}

/* Next & previous buttons */
.prev, .next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
padding: 16px;
margin-top: -12px;
color: white;
font-weight: bold;
font-size: 18px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
user-select: none;
}

/* Position the "next button" to the right */
.next {
right: 0;
border-radius: 3px 0 0 3px;
}

/* On hover, add a black background color with a little bit see-through */
.prev:hover, .next:hover {
background-color: rgba(0,0,0,0.8);
}

/* Caption text */
.text {
color: #f2f2f2;
font-size: 15px;
padding: 8px 12px;
position: absolute;
bottom: 0px;
width: 100%;
text-align: center;
}

/* Number text (1/3 etc) */
.numbertext {
color: #f2f2f2;
font-size: 12px;
padding: 2px 12px;
position: absolute;
top: 18;
}

/* The dots/bullets/indicators */
.dot {
cursor: pointer;
height: 15px;
width: 15px;
margin: 0 2px;
background-color: #bbb;
border-radius: 80%;
display: inline-block;
transition: background-color 0.6s ease;
}

active, .dot:hover {
background-color: #717171;
}
/* Fading animation */
.fade {
-webkit-animation-name: fade;
-webkit-animation-duration: 1.8s;
animation-name: fade;
animation-duration: 1.9s;
}

@-webkit-keyframes fade {
from {opacity: .4}
to {opacity: 1}
}

@keyframes fade {
from {opacity: .4}
to {opacity: 1}
}

/* On smaller screens, decrease text size */
@media only screen and (max-width: 0px) {
.prev, .next,.text {font-size: 11px}
}

</style>
</head>

<body>

<div class="navbar">
<a class="active" href="#"><i class="fa fa-fw fa-home"></i> Domů</a>
<a href="#"><i class="fa fa-fw fa-envelope"></i> Kontakt</a>
<a href="#"><i class="fa fa-fw fa-table"></i> Odkazy</a>
<a href="#"><i class="fa fa-fw fa-search"></i> Hledat</a>
</div>

</div>
<br>

function plusSlides(n) {
showSlides(slideIndex += n);
}

function currentSlide(n) {
showSlides(slideIndex = n);
}

</script>
<body>
</style>
</head

<h1 style="font-size:20px;">Poslat e-mail</h1>
<form action="/action_page.php">
  <label for="fname">Jméno</label><br>
  <input type="text" id="fname" name="fname" value=""><br>
  <label for="lname">Příjmení</label><br>
  <input type="text" id="lname" name="lname" value=""><br><br>
  <input type="submit" value="Poslat">
</form> 
<br>
<p></p>
<br>
<div class="slideshow-container">
</script>
<p style="font-size:50px;">Vítejte</p>
<style>
    .logo {position: absolute; left: 10px; top: 25px}

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