JSFiddle - React, Tailwind, and code Playground

HTML

<header class="header-top">
<nav class="menu">
<ul>
<li>
<a href="#">Фильмы</a>
<div class="dropdown films">
<ul>
<li><a href="#">Арт-хаус</a></li>
<li><a href="#">Боевики</a></li>
<li><a href="#">Военные</a></li>
</ul>
<ul>
<li><a href="#">Арт-хаус</a></li>
<li><a href="#">Боевики</a></li>
<li><a href="#">Военные</a></li>
</ul>
</div>
</li>
</ul>
</nav>
</header>

CSS

.header-top {
	background: #fff;
	height: 72px;
}

.menu {
	line-height: 72px;
}

.menu li {
	display: inline-block;
	position: relative;
}

.menu > ul > li > a {
	padding-left: 25px;
	color: #505f67;
}

.menu li a:hover {
	color: #07adf2;
}

.dropdown {
	background: #fff;
	padding: 20px 30px;
	line-height: 1;
	opacity: 0;
	filter: alpha(opacity=0);
	position: absolute;
	top: 100%;
	right: 0;
	visibility: hidden;
	-webkit-box-shadow: 0 5px 10px 0 #e0e3e6;
	-moz-box-shadow: 0 5px 10px 0 #e0e3e6;
	box-shadow: 0 5px 10px 0 #e0e3e6;
}

.menu > ul > li:hover .dropdown {
	opacity: 1;
	filter: alpha(opacity=1);
	visibility: visible;
}

.dropdown li {
	padding-bottom: 20px;
}

.dropdown li:last-child {
	padding: 0;
}

.dropdown li a {
	float: left;
	color: #a6afb8;
	-webkit-transition: all 0.3s ease;
	-moz-transition: all 0.3s ease;
	-o-transition: all 0.3s ease;
	transition: all 0.3s ease;
}

.dropdown li a:hover {
	color: #505f67;
}

.dropdown.films {
	left: 0;
  right: auto;
}

.dropdown.films ul {
  float: left;
	margin-right: 50px;
}