nav
{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 31px;
    background-color: white;
    color: #9d9999;
    border-bottom: 1px solid #d7d7d7;
}

nav > .container
{
    display: flex;
    justify-content: center;
    height: 100%;
}

#menu
{
  display: flex;
  align-items: center;
  height: inherit;
  margin: 0;
  transition: 0.5s;
  font-weight: bold;
}

#hamburger_menu
{
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: inherit;
  padding: 9px 0;
  margin-right: 15px;
  overflow: hidden;
}

#hamburger_menu span
{
  background-color: #9d9999;
  width: 24px;
  height: 2px;
  transition: 0.5s;
}

#menu span:first-child
{
    position: relative;
    top: 1px;
}

#menu span:last-child
{
  position: absolute;
  top: 14px;
}

#main_menu
{
  position: fixed;
  z-index: 2;
  top: 31px;
  left: -300vw;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  width: 100%;
  min-height: calc(100vh - 31px);
  padding: 0;
  margin: 0;
  background-color: white;
}

#main_menu > li
{
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  height: auto;
  min-height: 40px;
  text-align: center;
  border-bottom: solid 1px #d7d7d7;
  transition-duration: 0.2s;
}

#main_menu a, .menu_item, #main_menu li > span
{
      font-size: 15px;
  font-weight: bold;
  color: #9d9999;
  padding-left: 15px;
  padding-top: 11px;
  height: 40px;
  width: 100%;
  text-align: left;
}

@media(min-width: 860px)
{
  nav
  {
      border-bottom: none;
  }
}

@media(min-width: 960px)
{
    nav
    {
        height: 55px;
        margin-bottom: 10px;
        border-bottom: none;
    }

    #menu
    {
        display: none;
    }

    #main_menu
    {
        position: initial;
        flex-direction: row;
        justify-content: center;
        min-height: initial;
        width: initial;
    }

    #main_menu > li
    {
      border: none;
    }

    #main_menu a
    {
        display: flex;
        align-items: center;
        text-align: center;
        font-size: 13px;
        padding: 0 10px;
    }

    #main_menu li:hover
    {
        background-color: #e58a28;
    }

    #main_menu li:hover a
    {
        color: white;
    }

}

@media(min-width: 1200px)
{
    nav
    {
        height: 55px;
        margin-bottom: 20px;
    }
}

.opened #main_menu
{
  left: 0;
  transition: 0.5s;
  transition-timing-function: ease;
  transition-timing-function: ease-out;
}

.opened #hamburger_menu span:nth-child(1)
{
  opacity: 0;
  transition: 0.5s;
}

.opened #hamburger_menu span:nth-child(2)
{
  transform: rotate(-45deg);
  transition: 0.5s;
}

.opened #hamburger_menu span:nth-child(3)
{
  opacity: 0;
  transition: 0.5s;
}

.opened #hamburger_menu span:last-child
{
  transform: rotate(45deg);
  transition: 0.5s;
}