style.css

@import url("https://fonts.googleapis.com/css2?family=Cousine:wght@400;700&display=swap");

html,
body {
  height: 95%;
}

body {
  font-family: "Cousine", monospace;
}

nav {
  display: flex;
  justify-content: center;
  align-items: center;
}

nav a {
  /* display: inline-block; */
  text-decoration: none;
  font-size: 18px;
  color: black;
  border-bottom: 2px solid;
  margin: 10px;
}

nav a:hover {
  font-weight: 700;
  border-bottom: 2px dotted;
}

.container {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.main {
  text-align: center;
  background-color: black;
  color: #FFFBF2;
  padding: 30px 40px 35px 40px;
}

.main * {
  margin: 0;
  padding: 10px;
}

#hex-color,
#rgb-color {
  font-size: 24px;
}

#button {
  font-family: "Cousine", monospace;
  background-color: #FFFBF2;
  display: inline-block;
  font-size: 16px;
  text-align: center;
  text-decoration: none;
  border: none;
  cursor: crosshair;
  margin: 15px 15px 20px 15px;
  padding: 15px;
}

@media (max-width: 480px) {
  nav {
    flex-direction: column;
  }

  nav a {
    font-size: 14px;
    margin-bottom: 0;
  }

  .main h1 {
    font-size: 24px;
  }

  .main h2 {
    font-size: 22px;
  }

  #hex-color,
  #rgb-color {
    font-size: 20px;
    font-weight: 400;
  }

  #button {
    font-size: 14px;
    margin: 10px 10px 15px 10px;
    padding: 10px;
  }

  .main p {
    font-size: 14px;
    font-weight: 400;
  }
}