body {
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f4f4f4;
  margin: 0;
  padding: 0;
}

.dropdown {
  background-color: #4CAF50;
  position: sticky;
  top: 0;
  z-index: 1000;
}

#dropdown__btn {
  background-color: #4CAF50;
  color: white;
  padding: 10px;
  font-size: 10px;
  border: none;
  cursor: pointer;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}

.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}

.dropdown-content a:hover {
  background-color: #f1f1f1;
}

.dropdown:hover .dropdown-content {
  display: block;
}

h1 {
  color: #2E8B57;
  text-align: center;
  padding: 20px 0;
}

h2 {
  color: #20B2AA;
}

div {
  background-color: white;
  margin: 20px;
  padding: 20px;
  border-radius: 5px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

a {
  color: #1E90FF;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

#mem p {
  margin: 5px 0;
}

@media (max-width: 600px) {
  div {
      margin: 10px;
      padding: 10px;
  }
}