body {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;

  margin: 0;
  padding: 0;

  overflow-x: hidden;

  font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
}
.main {
  width: 1000px;
  max-width: 100%;

  padding: 2rem;
  box-sizing: border-box;
}
.nav {
  --text-color: #fff;
  --bg-color: #000;

  position: fixed;
  top: 0;

  display: flex;
  justify-content: center;
  align-items: center;

  width: 100vw;
  z-index: 1;

  display: flex;
  background-color: var(--bg-color);
  transition: all 0.1s, width 0s;
}
.nav.box-shadow {
  box-shadow: rgba(0, 0, 0, 0.24) 0px 3px 8px;
}
.nav .main {
  display: flex;
  justify-content: space-between;
  align-items: center;

  flex-grow: 0;

  padding: 1rem;
}
a {
  color: var(--text-color);
  text-decoration: none;
  transition: all 0.1s;
}
a:hover {
  color: #ff6b81;
}
.nav .main h2 {
  margin: 0;
  padding: 0;
}
.nav .main ul {
  display: flex;

  margin: 0;
  padding: 0;
}
.nav .main ul li {
  display: flex;
  justify-content: center;
  align-items: center;

  list-style-type: none;
  width: 6rem;
  font-weight: bold;
}
.cover {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;

  height: 100vh;
  width: 100vw;
  background-image: url(../../public/image/3-1364-909.jpg);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  color: white;

  font-size: 2em;
}
body > .main > p {
  opacity: 0.7;
  line-height: 2em;
}