main.css

:root {
  --marblue: #3763ff;
  --smoke: rgba(30, 30, 30, 0.9);
  --fog: rgba(77, 77, 77, 0.55);
}

* {
  font-family: "Roboto", sans-serif;
  color: white;
  margin: 0;
}

body {
  height: 100vh;
  background: url("../img/bg-classroom.jpg");
  background-size: 100vh cover;
  background-repeat: no-repeat;
  background-position: center;
}

main {
  box-sizing: border-box;
  height: 100vh;
  width: 100vw;
  background: rgba(0, 0, 0, 0.9);

  position: fixed;
  padding-bottom: 5rem;

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 1rem;
}

@media screen and (min-width: 576px) {
  main {
    justify-content: center;
  }
}



header * {
  font-family: "Roboto Mono", sans-serif;
}

header {
  max-width: 100vw;
}

header > h1 {
  word-wrap: break-word;
  text-indent: 0.25em;
  letter-spacing: 0.3em;
  text-align: center;
  font-size: 4rem;
  font-weight: 800;
}

@media screen and (min-width: 576px) {
  header {
    max-width: 40rem;
  }

  header > h1 {
    text-indent: 0.45em;
    letter-spacing: 0.5em;
  }
}



header > p {
  text-align: center;
  font-weight: 300;
  opacity: 0.8;
}

button {
  /* Style */
  background: var(--marblue);
  border: none;
  border-radius: 5px;
  font-weight: 500;
  font-size: 0.9rem;

  /* Sizing */
  height: 3rem;
  width: 100%;
  padding-left: auto;
  padding-right: auto;

  cursor: pointer;

  /* Transition */
  transition: filter 0.2s, background 0.2s;
}

button > span,
button > i {
  vertical-align: middle;
}

button > i {
  margin-right: 0.5rem;
}

button:hover {
  filter: brightness(115%);
  cursor: pointer;
}