nav .container-3-cols {
  flex-wrap: wrap;
}

nav .container-3-cols .column {
  margin-top: 1.66667rem;
}

nav .container-3-cols .column:nth-of-type(1), nav .container-3-cols .column:nth-of-type(2), nav .container-3-cols .column:nth-of-type(3) {
  margin-top: 0;
}

nav .container-3-cols .column:nth-of-type(3n+1) {
  margin-left: 0;
}

nav > ul {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: flex-start;
  justify-content: flex-start;
}

nav > ul > li {
  margin-left: 2.5rem;
}

nav > ul > li > a {
  position: relative;
  display: block;
  font-weight: 500;
  line-height: 1;
}

nav > ul > li:hover > a,
nav > ul > li:active > a {
  color: #009982;
}

nav > ul > li:hover > a::after,
nav > ul > li:active > a::after {
  content: '';
  position: absolute;
  bottom: -1.61111rem;
  left: 0;
  width: 100%;
  height: 1.55556rem;
  border-bottom: 4px solid #009982;
}

nav > ul > li.opened .nav-first-level-opener::after {
  transform: rotateX(90deg);
}

nav > ul > li .nav-first-level-opener {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 1;
  display: none;
  width: 30px;
  height: 30px;
  cursor: pointer;
}

nav > ul > li .nav-first-level-opener span {
  display: none;
}

nav > ul > li .nav-first-level-opener::before, nav > ul > li .nav-first-level-opener::after {
  content: '';
  position: absolute;
  background-color: #009982;
  transition: transform .3s;
}

nav > ul > li .nav-first-level-opener::before {
  top: 45%;
  right: 25%;
  left: 25%;
  width: 50%;
  height: 10%;
}

nav > ul > li .nav-first-level-opener::after {
  top: 25%;
  bottom: 25%;
  left: 45%;
  width: 10%;
  height: 50%;
}

@media (max-width: 1280px) {
  nav > ul > li:hover a::after,
  nav > ul > li:active a::after {
    border-bottom-width: 3px;
  }
}

@media (max-width: 1024px) {
  nav > ul > li:hover a::after,
  nav > ul > li:active a::after {
    border-bottom-width: 2px;
  }
}

@media (max-width: 960px) {
  nav {
    position: fixed;
    top: 4.44444rem;
    right: -360px;
    z-index: 20;
    width: 360px;
    max-width: 100%;
    height: calc(100vh - 80px + 20px);
    padding: 0;
    overflow: hidden;
    overflow-y: scroll;
    background-color: #f2f2f2;
    transition: right .3s;
  }
  nav > ul {
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: flex-start;
    justify-content: flex-start;
  }
  nav > ul > li {
    position: relative;
    z-index: 2;
    width: 100%;
    margin-left: 0;
    border-bottom: 1px solid #cccccc;
  }
  nav > ul > li > a {
    padding: 20px;
    line-height: 1;
    background-color: #ffffff;
  }
  nav > ul > li:nth-of-type(1) {
    border-top: 1px solid #cccccc;
  }
  nav > ul > li:hover > a::after,
  nav > ul > li:active > a::after {
    display: none;
  }
  nav > ul > li .nav-first-level-opener {
    display: block;
  }
  .header-burger-button:checked + label + nav {
    right: 0;
  }
}

.nav-second-level {
  position: absolute;
  top: 100%;
  z-index: 10;
  width: 17.77778rem;
  padding-top: 2.5rem;
  padding-bottom: 3.33333rem;
  overflow: hidden;
  transform: translateZ(0);
  background-color: #f2f2f2;
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s, visibility .3s;
}

.nav-second-level::before {
  content: '';
  position: absolute;
  top: -10px;
  display: block;
  width: 100%;
  padding-top: 10px;
}

.nav-second-level.mega-flyout {
  right: 0;
  left: 0;
  width: 100%;
  min-width: 100%;
  max-width: none;
  padding-top: 4.44444rem;
  padding-bottom: 8.88889rem;
}

.nav-second-level.mega-flyout::after {
  content: '';
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  display: block;
  height: 0.83333rem;
  background-image: linear-gradient(to bottom, rgba(51, 51, 51, 0.5), rgba(51, 51, 51, 0));
}

.nav-second-level .content-wrap {
  align-items: stretch;
  justify-content: flex-start;
}

.nav-second-level .container {
  width: 100%;
}

.nav-second-level .container .column {
  overflow: hidden;
  overflow-wrap: break-word;
  overflow-wrap: anywhere;
}

.nav-second-level-group {
  position: relative;
}

.nav-second-level-group + .nav-second-level-group {
  margin-top: 2.66667rem;
}

.nav-second-level-group-headline {
  position: relative;
  display: inline-block;
  margin-bottom: 1rem;
  margin-left: 2rem;
  color: #009982;
  font-weight: 700;
}

.nav-second-level-group-headline .icon {
  position: absolute;
  top: 1px;
  left: -2rem;
  width: 1.33333rem;
  height: 1.33333rem;
  background-repeat: no-repeat;
  background-position: left center;
  background-size: contain;
}

.nav-second-level-group-headline span {
  margin-left: -2rem;
}

.nav-second-level-group-headline .icon + span {
  margin-left: 0;
}

.nav-second-level-group-headline:hover {
  text-decoration: underline;
}

.nav-second-level-group.opened .nav-second-level-opener::after {
  transform: rotateX(90deg);
}

.nav-second-level ul li a {
  position: relative;
  display: block;
  margin-left: 1.33333rem;
  font-size: 0.88889rem;
  font-weight: 300;
}

.nav-second-level ul li a::before {
  content: '';
  position: absolute;
  top: 0.33333rem;
  left: -1.33333rem;
  width: 0.88889rem;
  height: 0.88889rem;
  font-size: 1.44444rem;
  background-image: url(../img/arrow-right-grey.svg);
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
}

.nav-second-level ul li a:hover {
  text-decoration: underline;
}

.nav-second-level .nav-second-level-opener {
  position: absolute;
  top: 0.88889rem;
  right: 14px;
  z-index: 1;
  display: none;
  width: 24px;
  height: 24px;
  cursor: pointer;
}

.nav-second-level .nav-second-level-opener span {
  display: none;
}

.nav-second-level .nav-second-level-opener::before, .nav-second-level .nav-second-level-opener::after {
  content: '';
  position: absolute;
  background-color: #009982;
  transition: transform .3s;
}

.nav-second-level .nav-second-level-opener::before {
  top: 45%;
  right: 25%;
  left: 25%;
  width: 12px;
  height: 2px;
}

.nav-second-level .nav-second-level-opener::after {
  top: 25%;
  bottom: 25%;
  left: 45%;
  width: 2px;
  height: 12px;
}

nav ul li:hover .nav-second-level {
  overflow: visible;
  opacity: 1;
  visibility: visible;
}

@media (max-width: 960px) {
  .nav-second-level,
  nav ul li:hover .nav-second-level {
    position: static;
    width: 100%;
    height: auto;
    padding-top: 0;
    padding-bottom: 0.83333rem;
    border-top: 1px solid #cccccc;
    overflow: hidden;
    opacity: 1;
    visibility: visible;
  }
  .nav-second-level.mega-flyout,
  nav ul li:hover .nav-second-level.mega-flyout {
    padding-top: 0;
    padding-bottom: 0.83333rem;
  }
  .nav-second-level .container,
  nav ul li:hover .nav-second-level .container {
    flex-direction: column;
  }
  .nav-second-level .container-3-cols,
  nav ul li:hover .nav-second-level .container-3-cols {
    flex-direction: column;
  }
  .nav-second-level .container-3-cols .column,
  .nav-second-level .container-3-cols .column + .column,
  nav ul li:hover .nav-second-level .container-3-cols .column,
  nav ul li:hover .nav-second-level .container-3-cols .column + .column {
    width: 100%;
    margin-left: 0;
  }
  .nav-second-level .container-3-cols .column:nth-of-type(n+3),
  nav ul li:hover .nav-second-level .container-3-cols .column:nth-of-type(n+3) {
    margin-top: 0;
  }
  .nav-second-level .content-wrap,
  nav ul li:hover .nav-second-level .content-wrap {
    padding: 0;
  }
  .nav-second-level::after,
  nav ul li:hover .nav-second-level::after {
    display: none;
  }
  .nav-second-level .nav-second-level-opener,
  nav ul li:hover .nav-second-level .nav-second-level-opener {
    display: block;
  }
  .nav-second-level-group + .nav-second-level-group {
    margin-top: 0;
  }
  .nav-second-level-group-headline {
    margin-top: 0.83333rem;
    margin-bottom: 0;
    margin-left: 2.77778rem;
  }
  .nav-second-level-group-headline .icon {
    top: 0;
    left: -1.55556rem;
  }
  .nav-second-level-group-headline span {
    margin-left: -1.55556rem;
  }
  .nav-second-level-group-headline .icon + span {
    margin-left: 0;
  }
  .nav-second-level-group ul {
    padding: 0.83333rem 1.44444rem;
    margin-top: 0;
    overflow: hidden;
  }
  .opened > a {
    color: #009982;
  }
}