.nav-bar {
  height: 100%;
  width: 0;
  position: fixed;
  z-index: 1;
  top: 20%;
  left: 0;
  margin-top: 60px;
}

.nav-bar li {
  list-style: none;
  overflow: visible;
}

.nav-bar a {
  padding: 8px 8px 8px 8px;
  font-size: 25px;
  color: #3f3f3f;
  display: block;
  transition: 0.3s;
  text-decoration: none;
  white-space: nowrap;
}

.nav-bar a:hover {
  color: #8f8f8f;
  cursor: pointer;
}

a.active {
  text-decoration: underline;
  text-underline-position: under;
  text-decoration-thickness: 5%;
}

.vertical-line {
  border-right: 3px solid;
  border-color: #8f8f8f;
  height: 80%;
  position: fixed;
  left: 18%;
  top: 10%;
}

/* width */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-thumb {
  background: #888;
}

::-webkit-scrollbar-thumb:hover {
  background: #555;
}

.burger-button {
  font-size: 25px;
  margin-left: 4%;
  margin-top: 5%;
  cursor: pointer;
  display: none;
}

#check {
  display: none;
}

#menu-bar:checked ~ ul {
  left: 0;
}

.cross-button {
  float: right;
  margin-top: 10px;
  margin-right: 10px;
}

.cross-button:hover {
  color: #8f8f8f;
}

@media (max-width: 1300px) {
  .burger-button {
    display: block;
    position: fixed;
  }

  .vertical-line {
    display: none;
  }

  .nav-bar {
    transition: ease-in-out;
    width: 75vw;
    background: aliceblue;
    transition: ease-in-out;
    top: -60px;
    margin-left: -120%;
    max-width: 300px;
  }

  .nav-bar a:hover {
    cursor: pointer;
  }

  #check:checked ~ .nav-bar {
    margin-left: 0;
  }
}

@media (max-width: 340px) {
  .nav-bar {
    width: 100vw;
  }
}

.back-button {
  background-color: white;
  border: solid black;
  border-width: 2px;
  margin-left: 20%;
}
.back-button:hover {
  transform: scale(1.5);
}

.u-image {
  margin-left: 27%;
  max-width: 1000px;
  margin-top: 1.5%;
}

.u-datart {
  margin-left: 20%;
}

.footer {
  position: fixed;
  right: 0;
  bottom: 0%;
  width: 82%;
  background-color: rgb(203, 231, 255);

  text-align: center;
}
footer {
  text-align: center;
  margin-top: 5%;
  margin-bottom: 5%;
  background-color: rgb(203, 231, 255);
  width: 80%;
  margin-left: 18%;
}

.indent {
  margin-left: 15px;
}