* {
  box-sizing: border-box;
}

body {
  padding: 1rem 3rem;
  font-family: 'Cabin', sans-serif;
  line-height: 1.4;
  min-width: 925px;
}

a {
  text-decoration: none;
}

.main-navigation {
  overflow: hidden;
  position: relative;
  padding: 0 0 0 1rem;
  /*  &::after {
      content: "";
      position: absolute;
      bottom: 16px;
      left: 0;
      width: 798px;
      height: 12px;
      background: linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.2));
      z-index: 5;
    }*/
}
.main-navigation ul {
  list-style: none;
  padding: 0;
}
.main-navigation li {
  float: left;
  width: 12rem;
  height: 5rem;
  margin: 0 0 0 -1rem;
  position: relative;
}
.main-navigation li.active {
  z-index: 6;
}
.main-navigation a {
  position: relative;
  display: inline-block;
  color: white;
  width: 100%;
  height: 100%;
  font-family: 'Oswald', sans-serif;
  text-transform: uppercase;
  font-size: 1.4rem;
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.4);
}
.main-navigation svg {
  width: 120%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  pointer-events: none;
}
.main-navigation span {
  position: relative;
  padding: 1rem 0 0 3.3rem;
  z-index: 2;
  display: inline-block;
  width: 100%;
  height: 100%;
}
.main-navigation .tab-1 {
  z-index: 4;
}
.main-navigation .tab-1 svg {
  fill: url(#tab-1-bg);
}
.main-navigation .tab-2 {
  z-index: 3;
}
.main-navigation .tab-2 svg {
  fill: url(#tab-2-bg);
}
.main-navigation .tab-3 {
  z-index: 2;
}
.main-navigation .tab-3 svg {
  fill: url(#tab-3-bg);
}
.main-navigation .tab-4 {
  z-index: 1;
}
.main-navigation .tab-4 svg {
  fill: url(#tab-4-bg);
}

.main-content {
  position: relative;
  z-index: 10;
  background: #76a0c0;
  margin: -1.6rem 0 0 0;
  padding: 3rem;
  border-radius: 15px;
  border-top-left-radius: 0;
}

.article {
  background: white;
  padding: 5rem;
  border-radius: 8px;
}
.article h2 {
  font-family: 'Oswald', sans-serif;
  text-transform: uppercase;
  font-size: 3rem;
  color: #76a0c0;
  margin: 0 0 0.5rem 0;
}