CSS heml, JS mega menu - html

Question

Please help.
When mouseover on "Products" tab the "services" items shifts to the right. I need help on the CSS settings.
* {
box-sizing: border-box;
}
body {
margin: 0;
}
.navbar {
overflow: hidden;
background-color: #333;
font-family: Arial, Helvetica, sans-serif;
}
.navbar a {
float: left;
font-size: 16px;
color: white;
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
.dropdown {
float: left;
overflow: hidden;
}
.dropdown .dropbtn {
font-size: 16px;
border: none;
outline: none;
color: white;
padding: 14px 16px;
background-color: inherit;
font: inherit;
margin: 0;
}
.navbar a:hover,
.dropdown:hover .dropbtn {
background-color: red;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
width: 100%;
position: relative;
left: 0;
box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
z-index: 1;
}
.dropdown-content .header {
background: red;
padding: 4px;
color: white;
}
.dropdown:hover .dropdown-content {
display: block;
}
/* Create three equal columns that floats next to each other */
.column {
float: left;
width: 33.33%;
padding: 10px;
background-color: #ccc;
height: 250px;
}
.column a {
float: none;
color: black;
padding: 16px;
text-decoration: none;
display: block;
text-align: left;
}
.column a:hover {
background-color: #ddd;
}
/* Clear floats after the columns */
.row:after {
content: "";
display: table;
clear: both;
}
<table width=960 border=0 cellspacing=0 cellpadding=0 align=center bgcolor='#bbeeff' style='padding:10px'>
<tr>
<td>
<div class="navbar">
<div class="dropdown">
<button class="dropbtn">Products
<i class="fa fa-caret-down"></i>
</button>
<div class="dropdown-content">
<!-- <div class="header">
<h2>...</h2>
</div> -->
<div class="row">
<div class="column">
<h3>Category 1</h3>
Link 1
Link 2
Link 3
</div>
<div class="column">
<h3>Category 2</h3>
Link 1
Link 2
Link 3
</div>
<div class="column">
<h3>Category 3</h3>
Link 1
Link 2
Link 3
</div>
</div>
</div>
</div>
<div class="dropdown">
<button class="dropbtn">Services
<i class="fa fa-caret-down"></i>
</button>
<div class="dropdown-content">
<!-- <div class="header">
<h2>...</h2>
</div> -->
<div class="row">
<div class="column">
<h3>Category 1</h3>
Link 1
Link 2
Link 3
</div>
<div class="column">
<h3>Category 2</h3>
Link 1
Link 2
Link 3
</div>
<div class="column">
<h3>Category 3</h3>
Link 1
Link 2
Link 3
</div>
</div>
</div>
</div>
</div>
<div style="padding:16px">
<p>home page ....</p>
</div>
</td>
</tr>
</table>

Answer 1

.dropdown-content {
position: absolute;
position: relative;
}
These two are mutually exclusive. What you actually want is to put position: relative on the parent element, .dropdown.
You will also have to remove overflow: hidden on the parent .dropdown and .navbar or the dropdown, which is outside of the element's frame, will not show.
Finally, because you've floated everything and nothing has a defined width, you will have to set a non-% width/height on some elements. I added height: 46px to your navbar and width: 500px to your .row.
* {
box-sizing: border-box;
}
body {
margin: 0;
}
.navbar {
height: 46px;
background-color: #333;
font-family: Arial, Helvetica, sans-serif;
}
.navbar a {
float: left;
font-size: 16px;
color: white;
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
.dropdown {
float: left;
position: relative;
}
.dropdown .dropbtn {
font-size: 16px;
border: none;
outline: none;
color: white;
padding: 14px 16px;
background-color: inherit;
font: inherit;
margin: 0;
}
.navbar a:hover,
.dropdown:hover .dropbtn {
background-color: red;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
width: 100%;
left: 0;
box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
z-index: 1;
}
.dropdown-content .header {
background: red;
padding: 4px;
color: white;
}
.dropdown:hover .dropdown-content {
display: block;
}
/* Create three equal columns that floats next to each other */
.row
{
width: 500px;
}
.column {
float: left;
width: 33.33%;
padding: 10px;
background-color: #ccc;
height: 250px;
}
.column a {
float: none;
color: black;
padding: 16px;
text-decoration: none;
display: block;
text-align: left;
}
.column a:hover {
background-color: #ddd;
}
/* Clear floats after the columns */
.row:after {
content: "";
display: table;
clear: both;
}
<table width=960 border=0 cellspacing=0 cellpadding=0 align=center bgcolor='#bbeeff' style='padding:10px'>
<tr>
<td>
<div class="navbar">
<div class="dropdown">
<button class="dropbtn">Products
<i class="fa fa-caret-down"></i>
</button>
<div class="dropdown-content">
<!-- <div class="header">
<h2>...</h2>
</div> -->
<div class="row">
<div class="column">
<h3>Category 1</h3>
Link 1
Link 2
Link 3
</div>
<div class="column">
<h3>Category 2</h3>
Link 1
Link 2
Link 3
</div>
<div class="column">
<h3>Category 3</h3>
Link 1
Link 2
Link 3
</div>
</div>
</div>
</div>
<div class="dropdown">
<button class="dropbtn">Services
<i class="fa fa-caret-down"></i>
</button>
<div class="dropdown-content">
<!-- <div class="header">
<h2>...</h2>
</div> -->
<div class="row">
<div class="column">
<h3>Category 1</h3>
Link 1
Link 2
Link 3
</div>
<div class="column">
<h3>Category 2</h3>
Link 1
Link 2
Link 3
</div>
<div class="column">
<h3>Category 3</h3>
Link 1
Link 2
Link 3
</div>
</div>
</div>
</div>
</div>
<div style="padding:16px">
<p>home page ....</p>
</div>
</td>
</tr>
</table>