* {
  /* universal */
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: 'Calibri';
}

body {
  margin: 0;
  font-family: sans-serif;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
  border: 1px solid #7FC7D9;
}

hr {
  margin-top: 10px;
  margin-bottom: 10px;
  border: 0;               
  height: 1px;
  background-color: #7FC7D9;
}

.head {
  z-index: 10;
  padding: 5px;
  padding-right: 20px;
  padding-left: 20px;
  margin-left: 20px;
  font-weight: bold;
  font-size: 20px;
  color:  #0F1035;
}

.head.active {
  color: #7FC7D9;
}

main {
  min-height: 630px;
  display: flex;
  justify-content: center;
  padding: 5px;
}

.case {
  display: flex;
  flex-direction: column;
  width: 50%;
  margin: 5px;
  border: solid 1px #DCF2F1;
  padding: 10px;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
}

.card {
  border: 1px solid #7FC7D9;
  margin-bottom: 5px;
  min-height: 150px;
  border-radius: 5px;
  padding: 10px;
  color: #0F1035;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
  width: 100%;
}

.card-body {
  min-height: 500px;
}

.sidebar {
  width: 250px;
  height: 98.5vh;
  background-color: #080A20;
  color: #7FC7D9;
  position: fixed;
  top: 0;
  left: -270px;
  transition: left 0.3s ease;
  padding: 20px;
  padding-top: 50px;
  border-radius: 5px;
  margin: 5px;
}

.sidebar.active {
  left: 0;
}

.sidebar-list {
  margin-top: 5px;
  margin-bottom: 5px;
}

a {
  text-decoration: none;
  color: #7FC7D9;
}

a:hover {
  text-decoration: none;
  color: white;
}

.toggle-btn {
  position: absolute;
  top: 15px;
  left: 15px;
  padding: 5px 10px;
  background-color: #DCF2F1;
  transition: left 0.3s ease;
  color: #0F1035;
  border: none;
  cursor: pointer;
  z-index: 10;
}

.toggle-btn.active {
  background-color: #080A20;
  color: #7FC7D9;
}

button {
  padding: 5px;
  padding-left: 10px;
  padding-right: 10px;
  border-radius: 3px;
  border: 1px solid #0F1035;
  background-color: #0F1035;
  color: #DCF2F1;
  cursor: pointer;
  font-size: 16px;
}

@media screen and (max-width: 1000px) {
  main {
    flex-direction: column;
  }

  .case {
    width: 100%;
    flex-direction: column;
  }
}