* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}
:root {
  --accent-color: #45494E;
  --gradient-color: #FBFBFB;
}

a:after {
  content: "";
  background: #FBFBFB;
  position: absolute;
  bottom: 5px;
  left: 15px;
  height: 3px;
  width: 0;
  transition: .5s;
  transition-delay: .2s;
}
.menu {
  position: fixed;
  top: 100px;
  left: 100px;
  width: 100px;
  font-size: 12px;
  z-index: 999;
}
.menu > ol {
  list-style: none;
  padding: 0;
}
.menu > ol > li {
  background: #3c3c3c;
  border-left: 5px solid var(--gradient-color);
  margin-bottom: 1px;
  position: relative;
  transition: .5s;
}
.menu > ol > li:nth-child(1) {
  --accent-color: #FDA085;
  --gradient-color: #F6D365;
}
.menu > ol > li:nth-child(2) {
  --accent-color: #BFF098;
  --gradient-color: #6FD6FF;
}
.menu > ol > li:nth-child(3) {
  --accent-color: #EA8D8D;
  --gradient-color: #A890FE;
}
.menu > ol > li:nth-child(4) {
  --accent-color: #D8B5FF;
  --gradient-color: #1EAE98;
}
.menu > ol > li:nth-child(5) {
  --accent-color: #C6EA8D;
  --gradient-color: #FE90AF;
}
.menu > ol > li:nth-child(6) {
  --accent-color: #8dbaea;
  --gradient-color: #FE90AF;
}
.menu > ol > li a {
  color: #FBFBFB;
  display: block;
  padding: 15px;
  position: relative;
  text-decoration: none;
  z-index: 1;
}

.menu > ol > .active:after {
  background: linear-gradient(to left, var(--accent-color), var(--gradient-color));
  max-width: 800px;
}

.menu > ol > li:focus .sub-menu,
.menu > ol > li:focus-within .sub-menu {
  max-height: 500px;
}

.menu > ol > li:after {
  background: #3c3c3c;
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  transition: .5s;
  max-width: 0;
  overflow: hidden;
}

a:hover:after {
    width: 50px;
}
a:after {
    left: 0;
    right: 0;
    margin: auto;
}
.active > a:after {
    width: 50px;
    left: 0;
    right: 0;
    margin: auto;
}
.menu > ol {
    display: block;
    max-width: none;
    text-align: center;
}
.menu > ol > li {
    border-top: 5px solid var(--accent-color);
    border-left: 0;
    display: inline-block;
    margin-left: -5px;
    vertical-align: top;
    width: 150px;
}
.menu > ol > .active:after {
    background: linear-gradient(to bottom, var(--accent-color), var(--gradient-color));
    border-radius: 3px;
    top: -5px;
    bottom: -5px;
    left: -5px;
    right: -5px;
}

.container-div {
  margin: 0;
  padding: 0;
}
.content1 {
  padding: 0 250px;
  height: 700px;
  background: -webkit-linear-gradient(to bottom, #fda0856b, #f6d36585);
  background: linear-gradient(to bottom, #fda0856b, #f6d36585);
}
.content2 {
  padding: 0 250px;
  height: 700px;
  background: -webkit-linear-gradient(to bottom, #bff0986b, #6fd6ff85);
  background: linear-gradient(to bottom, #bff0986b, #6fd6ff85);
}
.content3 {
  padding: 0 250px;
  height: 700px;
  background: -webkit-linear-gradient(to bottom, #ea8d8d6b, #a890fe85);
  background: linear-gradient(to bottom, #ea8d8d6b, #a890fe85);
}
.content4 {
  padding: 0 250px;
  height: 700px;
  background: -webkit-linear-gradient(to bottom, #d8b5ff6b, #1eae9885);
  background: linear-gradient(to bottom, #d8b5ff6b, #1eae9885);
}
.content5 {
  padding: 0 250px;
  height: 700px;
  background: -webkit-linear-gradient(to bottom, #c6ea8d6b, #fe90af85);
  background: linear-gradient(to bottom, #c6ea8d6b, #fe90af85);
}
.content6 {
  padding: 0 250px;
  height: 700px;
  background: -webkit-linear-gradient(to bottom, #8dbaea6b, #fe90af85);
  background: linear-gradient(to bottom, #8dbaea6b, #fe90af85);
}