body, *{
  padding: 0;
  margin: 0;
}

section {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
}
.main {
  background-color: #27ae60;
}
.news {
  background-color: #9b59b6;
}
.contacts {
  background-color: #3498db;
}
.portfolio {
  background-color: #f1c40f;
}
.wrapper {
  position: relative;
  overflow-x: hidden;
}
.menu {
  position: fixed;
  left: 0;top: 0;
  z-index: 99;
  width: 30%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #fff;
  transition: 0.5s;
  transform: translateX(-100%);
}
.menu_active {
  transform: translateX(0%);
}
.menu-list {
  display: flex;
  justify-content: space-around;
  align-items: center;
  height: 50%;
  flex-direction: column;
}
.menu-list a {
  text-decoration: none;
  text-transform: uppercase;
  font-weight: 900;
}
.menu-btn {
  width: 30px;
  height: 30px;
  background-color: #333;
  position: absolute;
  right: -35px;
  top: 10px;
}
.content {
  transition: 0.5s;
  position: relative;
  z-index: 0;
}
.content_active {
  transform: translateX(30%);
}