* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  font-size: 62.5%;

  --tt-gray: hsl(240, 7%, 78%);
  --tt-white: hsl(0, 0%, 100%);
  --tt-h1: hsl(240, 9%, 89%);
}

body {
  font-family: 'Roboto', sans-serif;
  height: 100vh;
  background-image: url(./images/page1.png);
  background-repeat: no-repeat;
  background-size: cover;
  margin-bottom: 10rem;
}

.content {
  display: flex;
  align-items: center;
  padding: 4rem 7.2rem;
}

nav > a {
  margin-left: 3.2rem;
}

nav a {
  font-weight: 400;
  font-size: 2.1rem;
  line-height: 2.2rem;
  color: var(--tt-gray);
  text-decoration: none;
}

nav a:hover {
  color: var(--tt-white);
  font-weight: bold;
}

h1 {
  color: var(--tt-h1);
  font-size: 4.8rem;
  line-height: 125%;
}

p {
  margin-top: 1.6rem;
  color: var(--tt-white);
  font-style: normal;
  font-weight: 400;
  font-size: 1.8rem;
  line-height: 160%;
}

.universe,
.exploration {
  max-width: 64.8rem;
  margin: 6rem 10rem;
  transition: 1s;
  opacity: 0.8;
}

.universe:hover,
.exploration:hover {
  opacity: 1;
}