Uwebik.ucoz.com

<nav>
  <a href='#'>Главная</a>
  <a href='#'>Портфолио</a>
  <a href='#'>Отзывы</a>
  <a href='#'>Контакты</a>
</nav>

* {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
}
html, body {
  margin: 0;
  padding: 0;
}
nav {
  background: none repeat scroll 0 0 #202033;
  box-shadow: 0 3px 5px #555555;
  position: relative;
  text-align: center;
}
nav:hover a {
  color: transparent;
  text-shadow: 0 0 3px #CC5C00;
}
nav a {
  color: #CC5C00;
  display: inline-block;
  font-family: tahoma;
  font-size: 1.25em;
  height: 66px;
  line-height: 66px;
  text-decoration: none;
  transition: all 0.3s ease 0s;
  width: 150px;
}
nav a:hover {
  border-bottom: 5px solid #FF7300;
  color: #FF7300;
  text-shadow: none;
}
@media screen and (max-width: 620px) {
  nav a {
  width: 49%;
  }
}
@media screen and (max-width: 300px) {
  nav a {
  width: 100%;
  }
}