* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Lato", sans-serif;
}

.wrapper {
  position: relative;
  display: flex;
}

.progress {
  position: relative;
  overflow: hidden;
  width: 200px;
  height: 10px;
  background: #5c6370;
  border-radius: 30px;
}
.progress__bar {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 50%;
  background: #000ee6;
  border-radius: 30px;
  transition: 0.3s width;
}

.nav {
  width: 300px;
  display: flex;
  justify-content: center;
  padding: 50px;
  flex-direction: column;
  gap: 30px;
  position: fixed;
  left: 0;
  top: 0;
  height: 100vh;
  background: #ffffff;
  border-right: 1px solid #5c6370;
}
.nav__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.nav__link {
  font-size: 22px;
  color: #5c6370;
  text-decoration: none;
}
.nav__link.active {
  color: #000ee6;
}

main {
  overflow-y: scroll;
  width: 100%;
  margin-left: 300px;
}
main::-webkit-scrollbar {
  display: none;
}

.section {
  height: 700px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 48px;
}
.section.section-1 {
  background: lightblue;
}
.section.section-2 {
  background: beige;
}
.section.section-3 {
  background: bisque;
}
.section.section-4 {
  background: palegoldenrod;
}
.section.section-5 {
  background: lavender;
}