#content, html, body {
    height: 100%;
    margin: 0px;
font-family: "yoon-px-pixelbatang", sans-serif;
font-weight: 400;
font-style: normal;
    font-size: 20px;
    color: black;
    background-color: white;

}

a {
  color: blue;
  text-decoration: none;
  border-bottom: 1px solid black;
}

h1 {
  margin: 0;
  font-size: 23px;
  font-weight: normal;
}

h2 {
  margin: 0;
  font-size: 23px;
  font-weight: normal;
}


hr {
  border-top: 1px dashed black;
  border-bottom: 0px;
}

#main {
    float: left;
    border-right: 1px solid black;
    padding: 20px;
    width: calc(100vw - 40px);
    height: calc(100vh - 40px);
    overflow: scroll;
}

.button {
  border: 5px double black;
  border-radius: 40px;
  padding: 10px;
  padding-left: 20px;
  margin-top: 20px;
  margin-bottom: 20px;
  cursor: pointer;
}
.button:hover {
  background-color: lightgrey;
  color: blue;
  cursor: pointer;
}
.students {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.planning {
  display: grid;
  grid-template-columns: 1fr 4fr;
}

figure {
    margin: 0;
}


/* ---------------------------- MOBILE ---------------------------- */

@media only screen and (max-width:800px) {

  #content, html, body {
      font-size: 18px;
  }

  .button {
  }

  h1 {
    font-size: 25px;
  }
  h2 {
    font-size: 25px;
  }
}
@media only screen and (max-width:550px) {
  .planning {
    font-size: 15px;
    display: grid;
    grid-template-columns: 2fr 5fr;
  }
}