@media screen and (max-width: 760px) {
  header .container {
    flex-direction: column;
  }

  header nav {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
  }

  .main-course {
    align-items: center;
    text-align: center;
  }

  .main-course .container .description {
    align-items: center;
    text-align: center;
    width: 100%
  }

  .buttons {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
  }

  .button {
    margin-top: 5px;
  }

  .carousel .box-course {
    height: 100%;
    width: 100%;
    display: inline-block;
    margin: 0px;
  }

  header .container {
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
}

@media screen and (max-width: 600px) {
  .main-course .container .title {
    font-size: 30px;
  }

  .main-course .container .description {
    margin: 10px 0px;
    font-size: 14px;
  }
}