Tekrar şu kodu dener misin.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Css-sites</title>
<style type="text/css">
body {
margin: 0;
}
* {
margin: 0;
}
.navbar {
background-color: yellow;
padding: 15px 0 15px 10px;
}
.main-div__items > li > a {
text-decoration: none;
color: #4E6E81;
font-weight: bold;
font-size: 15px;
font-family: sans-serif;
}
.main-div {
display: inline-block;
width: calc(100% - 150px);
text-align: center;
}
.main-div__items {
margin: 0;
padding: 0;
list-style: none;
}
.main-div__item {
display: inline-block;
margin-left: 10px;
box-sizing: border-box;
}
.main_logo {
color: #40513B;
text-decoration: none;
font-size: 15px;
font-weight: bold;
}
.main-div__item:hover {
background-color: #F5FFC9;
border: 2px solid #F5FFC9;
}
</style>
</head>
<body>
<header class="main-header">
<div class="navbar">
<div class="main-div">
<ul class="main-div__items">
<li class="main-div__item"><a href="#">Bu</a></li>
<li class="main-div__item"><a href="#">Bir</a></li>
<li class="main-div__item"><a href="#">Deneme</a></li>
<li class="main-div__item"><a href="#">Yazısıdır.</a></li>
</ul>
</div>
</div>
</header>
</body>
</html><!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Css-sites</title>
<style type="text/css">
body{
margin: 0;
}
*{
margin: 0;
}
.navbar{
background-color: yellow;
padding: 15px 0 15px 10px;
}
.main-div__items > li > a{
text-decoration: none;
color: #4E6E81;
font-weight: bold;
font-size: 15px;
font-family: sans-serif;
}
.main-div{
display: inline-block;
width: calc(100% - 150px);
text-align: center;
}
.main-div__items{
margin: 0;
padding: 0;
list-style: none;
}
.main-div__item{
display: inline-block;
margin-left: 10px;
}
.main_logo{
color: #40513B;
text-decoration: none;
font-size: 15px;
font-weight: bold;
}
.main-div__item:hover{
background-color: #F5FFC9;
border: 2px solid #F5FFC9;
}
</style>
</head>
<body>
<header class="main-header">
<div class="navbar">
<div class="main-div">
<ul class="main-div__items">
<li class="main-div__item"><a href="#">Bu</a></li>
<li class="main-div__item"><a href="#">Bir</a></li>
<li class="main-div__item"><a href="#">Deneme</a></li>
<li class="main-div__item"><a href="#">Yazısıdır.</a></li>
</ul>
</div>
</div>
</header>
</body>
</html>