.menu a {
  text-decoration: none;
  color: #fff;
text-shadow: 0 1px #2b6a83;
  font-weight: bold;
  float: left;
  display: block;
}
.menu a:hover { color: #276a85; text-shadow: 0 1px #e1eff5; }
.drop-down a {
  float: none;
  min-width: 90px;
}

.menu a {
  display: block;
  padding: 10px 15px;
}

.drop-down-menu {
  float: left;
  display: block;
}

.menu-title {
  cursor: default;
  padding: 10px 15px;
}

.activate {
  display: none;

  position: absolute;
  cursor: pointer;
  width: 100%;
  height: 40px;
  margin: 0 0 0 -15px;
  opacity: 0;
}

@media only screen and (min-width: 800px) {

  .drop-down-menu:hover .drop-down {
  display: block;
  }  

  .drop-down {
  position: absolute;
  }

}

@media only screen and (max-width: 799px) {

  .menu a, .drop-down-menu {
  float: none;
  }

  .activate {
  display: block;
  }

}

/* Skin */

.menu a, .drop-down-menu {
  background: #44a7cf;
  background: -webkit-gradient(linear, left top, left bottom, from(#44a7cf), to(#317794));
  background: -moz-linear-gradient(top, #44a7cf, #317794);
}

.menu a:hover, .drop-down-menu:hover {
  background: #5a6470;
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#feffff), color-stop(100%,#a2cfe0));
  background: -moz-linear-gradient(top, #feffff 0%, #a2cfe0 100%);
}

.drop-down a {
  background: #222;
}

.drop-down a:hover {
  background: #111;
}

@media only screen and (min-width: 800px) {

  .first {
  border-top-left-radius: 8px;
  border-bottom-left-radius: 8px;
  }

  .last {
  border-top-right-radius: 8px;
  border-bottom-right-radius: 8px;
  }

  .drop-down .last {
  border-radius: 0;
  border-bottom-left-radius: 8px;
  border-bottom-right-radius: 8px;
  }

}

@media only screen and (max-width: 799px) {

  .menu {
background: #44a7cf;
  background: -webkit-gradient(linear, left top, left bottom, from(#44a7cf), to(#317794));
  background: -moz-linear-gradient(top, #44a7cf, #317794);
}
  :checked ~ .menu-title {
  background: #495261;
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#495261), color-stop(100%,#38404b));
  background: -moz-linear-gradient(top, #495261 0%, #38404b 100%);
  }

  .menu a, .drop-down-menu {
  background: none;
  }

  .drop-down a {
  background: #222;
  }

}

/* IE */

.ie8 .drop-down-menu:hover .drop-down { display: block; }  
.ie8 .drop-down { position: absolute; }

.drop-down {
  max-height: 0;
  overflow: hidden;
}

.ie8 .drop-down-menu:hover .drop-down {
  max-height: 200px;
}

@media only screen and (min-width: 800px) {

  .drop-down-menu:hover .drop-down {
  max-height: 200px;
  }  

}

@media only screen and (max-width: 799px) {

  .activate:checked ~ .drop-down {
  max-height: 200px;
  }  

}

.drop-down, .menu a, .drop-down-menu {
  -webkit-transform: translateZ(0);  
  -webkit-transition: all 0.3s;
  -moz-transition: all 0.3s;
  -o-transition: all 0.3s;
  transition: all 0.3s;
}

<nav class="menu">  
<a class="first" href="/">Главная</a>  
  <a href="/load">Форум</a>  
  <a href="/load">Фильмы</a>  
  <a href="/load">Мульфильмы</a>  
  <a href="/load">Поиск</a>  
  <a href="/load">Выход</a>  
  <a class="last" href="/load">Добавить материал</a>  
  </nav>