I'm a complete beginner and I'm trying to make a navigation bar.
I'm trying to make a navigation bar that works and looks like this one from this webpage (different colors): https://www.swiss.com/ch/EN/prepare/check-in

I've come so far:

I want each column in .dropdown-content to be the same width as the ones in .column That means the orange column "hello world1" to be the same width as "Category 1" and so forth.
And I also want both columns that are underneath each other to be connected as in the link above. Whenever I hover over the .dropdown-content, I want the background-color of .column to change as well.
Here is my snippet:
* {
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 {
color: #fc7b03;
background-color: #B5B5B5;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #fc7b03;
width: 100%;
left: 0;
box-shadow: 0px 3px 26px 0px #fc7b03;
z-index: 1;
opacity: 95%;
}
.dropdown-content .header {
background: red;
padding: 16px;
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: #B5B5B5;
height: 250px;
opacity: 100%;
}
.header2 {
float: left;
width: 33.33%;
padding: 1px;
background-color: #fc7b03;
height: 150px;
opacity: 100%;
font-size: 12px;
}
.header22 {
float: left;
position: relative;
width: 95%;
margin-left: 2.5%;
padding: 1px;
background-color: #fc7b03;
opacity: 100%;
font-size: 12px;
}
.header2:hover {
background-color: #B5B5B5;
}
.column a {
float: none;
color: black;
padding: 16px;
text-decoration: none;
display: block;
text-align: left;
}
.column a:hover {
background-color: #ddd;
color: #fc7b03;
}
/* Clear floats after the columns */
.row::after {
content: "";
display: table;
clear: both;
}
.row2::after {
content: "";
display: table;
clear: both;
}
/* Responsive layout - makes the three columns stack on top of each other instead of next to each other */
@media screen and (max-width: 600px) {
.column {
width: 100%;
height: auto;
}
}
<link href="/resources/header/header.css" type="text/css" rel="stylesheet">
<body>
<!-- this is the dropdown navigation panel -->
<!-- Load font awesome icons -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<div class="navbar">
<a href="#home">Home</a>
<a href="#news">News</a>
<div class="dropdown">
<button class="dropbtn">Dropdown
<i class="fa fa-caret-down"></i>
</button>
<div class="dropdown-content">
<div class="row2">
<a href="http://google.com">
<img src="https://image.shutterstock.com/image-vector/real-estate-logo-260nw-1615688014.jpg" style="width:50px; height:50% ">
<br>
<span style="display: block" class="header22">
Hello world1
</span>
</a>
<a href="http://google.com">
<span style="display: block" class="header22">
Hello world2
</span>
</a>
<a href="http://google.com">
<span style="display: block" class="header22">
Hello world3
</span>
</a>
-->
<!--
<a href="#">
<div class="header2">
<img src="https://image.shutterstock.com/image-vector/real-estate-logo-260nw-1615688014.jpg" style="width:50px; height:50% ">
<h2>Mega Menu</h2>
</div>
</a>
<div class="header2">
<h2 >Mega Menu2</h2>
</div>
-->
</div>
<div class="row">
<div class="column">
<h3>Category 1</h3>
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
<div class="column">
<h3>Category 2</h3>
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
<div class="column">
<h3>Category 3</h3>
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
</div>
</div>
</div>
</div>
<div style="padding:16px">
<h3>balbllalba</h3>
<p>Hover over the "Dropdown" link to see the mega menu.</p>
<p>Re</p>
</div>
<div style="padding:16px">
<h3>Responsive Mega Menu (Full-width dropdown in navbar)</h3>
<p>Hover over the "Dropdown" link to see the mega menu. </p>
</div>
</body>
EDIT: I've been able to get a bit further, however i still can't get "Hello world" and "Category 1" to act as one unit under "hover". Not a huge problem, but for now i'm satisfied with what i've got:
* {
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 {
color: #fc7b03;
background-color: #B5B5B5;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #fc7b03;
width: 100%;
left: 0;
box-shadow: 0px 3px 26px 0px #fc7b03;
z-index: 1;
opacity: 95%;
}
.dropdown-content .header {
background: red;
padding: 16px;
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: #B5B5B5;
height: 250px;
opacity: 100%;
}
.header22 {
float: left;
width: 33.33%;
padding: 1px;
background-color: #fc7b03;
height: 150px;
opacity: 100%;
font-size: 12px;
}
.header22s {
float: left;
position: relative;
width: 95%;
margin-left: 2.5%;
padding: 1px;
background-color: #fc7b03;
opacity: 100%;
font-size: 12px;
border: solid;
}
.header2:hover {
background-color: #B5B5B5;
}
.column a {
float: none;
color: black;
padding: 16px;
text-decoration: none;
display: block;
text-align: left;
}
.column a:hover {
background-color: #ddd;
color: #fc7b03;
}
/* Clear floats after the columns */
.row::after {
content: "";
display: table;
clear: both;
}
.row2::after {
content: "";
display: table;
clear: both;
}
/* Responsive layout - makes the three columns stack on top of each other instead of next to each other */
@media screen and (max-width: 600px) {
.column {
width: 100%;
height: auto;
}
}
.column:hover , .header22:hover{
animation-duration: 1.5s;
animation-name: border;
animation-iteration-count: infinite;
}
@keyframes border {
from {
border: solid white;
border-width: 2px;
}
to {
border: solid #D3CFCF;
border-width: 2px;
}
}
/* not used stuff
.column:hover {
background-color: #B5B5B5;
transition-property: border-color;
transition-duration: 1.5s;
border: solid #dbd8cf;
border-width: 2px;
}
*/
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<div class="navbar">
<a href="#home">Home</a>
<a href="#news">News</a>
<div class="dropdown">
<button class="dropbtn">Dropdown
<i class="fa fa-caret-down"></i>
</button>
<div class="dropdown-content">
<div class="row2">
<a href="http://google.com" class="header22" id="ga">
<img src="https://image.shutterstock.com/image-vector/real-estate-logo-260nw-1615688014.jpg"
style="width:50px; height:50% ">
<br>
<span style="display: block">
Hello world1
</span>
</a>
<a href="http://google.com" class="header22">
<span style="display: block">
Hello world2
</span>
</a>
<a href="http://google.com" class="header22">
<span style="display: block">
Hello world3
</span>
</a>
<!--
<a href="#">
<div class="header2">
<img src="https://image.shutterstock.com/image-vector/real-estate-logo-260nw-1615688014.jpg" style="width:50px; height:50% ">
<h2>Mega Menu</h2>
</div>
</a>
<div class="header2">
<h2 >Mega Menu2</h2>
</div>
-->
</div>
<div class="row">
<div class="column" id="ga">
<h3>Category 1</h3>
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
<div class="column">
<h3>Category 2</h3>
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
<div class="column">
<h3>Category 3</h3>
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
</div>
</div>
</div>
</div>