* {
  margin: 0;
  padding: 0;
}

ul {
  list-style-type: none;
  padding: 0;
  width: 15%;
  background-color: #f1f1f1;
  position: fixed;
  height: 90%;
  overflow: auto;
}

ul li a {
  display: block;
  color: #000;
  padding: 8px 16px;
  text-decoration: none;
}

ul li a.active {
  background-color: #4CAF50;
  color: white;
}

ul li a:hover:not(.active) {
  background-color: #555;
  color: white;
}

.header {
  padding: 10px;
  background: #FF2040;
  text-align: center;
  font-weight: bold;
  font-size: 26px;
}

.nav {

}

.card {
  margin-left: 15%;
  margin-top: 10px;
  padding: 10px;
  overflow: auto;
}

.subcard {
  margin-top: 10px;
  padding: 10px;
  overflow: auto;
}

#login_body {
  margin: 0 auto;
  margin-top: 5%;
  border: 10px solid #FFFF21;
  padding: 10px;
}