Css Dropdown Button in a navbar - html

Question

Okay so I'm trying to learn CSS and I'm trying to insert a dropdown button in a navbar.
What's happening is that when I hover the button the whole navbar is expanding instead of only the content of the button. What am I doing wrong? Thanks!
ul {
list-style-type: none;
margin-left:8%;
margin-right: 8%;
padding-left: 0;
padding-right: 0;
overflow: hidden;
background-color: #f3f3f3;
}
.right{
float: right;
}
li a {
float: left;
display: block;
color: #6f6f6f;
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
li a:hover {
background-color: #e0e0e0;
}
p {
color: red;
margin-left: 8%;
margin-right: 8%;
}
body{
font-family:Arial;
background-color:#f9f9f9;
}
.dropbtn {
background-color: #f3f3f3;
color: #6f6f6f;
padding: 14px 16px;
font-size: 16px;
border: none;
cursor: pointer;
}
/* The container <div> - needed to position the dropdown content */
.dropdown {
position: relative;
display: block;
}
/* Dropdown Content (Hidden by Default) */
.dropdown-content {
right: 0;
display: none;
position: relative;
background-color: #f9f9f9;
min-width: 10px;
}
/* Links inside the dropdown */
.dropdown-content a {
right: 0;
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
}
/* Change color of dropdown links on hover */
.dropdown-content a:hover {background-color: #e0e0e0}
/* Show the dropdown menu on hover */
.dropdown:hover .dropdown-content {
display: block;
right:0;
}
/* Change the background color of the dropdown button when the dropdown content is shown */
.dropdown:hover .dropbtn {
background-color: #e0e0e0;
}
<ul>
<li><img src="../../static/image/logoRect.png" width="25"> </li>
<li>Movies</li>
<li><a class="right" href="">Search</a></li>
<div class="right">
<div class="dropdown">
<button class="dropbtn">Dropdown</button>
<div class="dropdown-content">
Links 1
Link 2
Link 3
</div>
</div>
</div>
<li><a class="right" href="#about">Explore</a></li>
</ul>

Answer 1

You have to specify a height and remove the overflow hidden.
ul {
list-style-type: none;
margin-left:8%;
margin-right: 8%;
padding-left: 0;
padding-right: 0;
// overflow: hidden; <---remove
height: 48px; // <---add
background-color: #f3f3f3;
}
If you don't, the ul defaults to as if it has:
height: auto;
Relevant fiddle

Answer 2

You should specify the height of the <ul> element, so it won't expand with the dropdown.