body {
  background-image: url("bg0.png");
}
h1 {
  color: black;
  font-family:"trebuchet ms", verdana, sans-serif;
}

h1_1 {
  color: black;
  font-family:"trebuchet ms", verdana, sans-serif;
  display: block;
  font-size: 2em;
  margin-top: 0.67em;
  margin-bottom: 0.67em;
  margin-left: 50px;
  margin-right: 50px;
  font-weight: bold;
}

h2 {
  color: white;
  font-family:"trebuchet ms", verdana, sans-serif;
  margin-right: 50px;
  margin-left: 50px;
  margin-top: 25px;
  margin-bottom: 25px;
  padding: 10px;
}

p {
  color: white;
  font-family:"trebuchet ms", verdana, sans-serif;
  margin-right: 50px;
  margin-left: 50px;
  margin-top: 25px;
  margin-bottom: 25px;
  padding: 50px;
  background-color: hsla(0, 0%, 15%, 0.7);
}

p2 {
  display: block;
  color: white;
  font-family:"trebuchet ms", verdana, sans-serif;
  margin-right: 10px;
  margin-left: 10px;
  margin-top: 10px;
  margin-bottom: 10px;
  padding: 25px;
  background-color: hsla(0, 0%, 5%, 0.7);
}

.collapsible {
  background-color: #777;
  color: white;
  cursor: pointer;
  margin-left: 50px;
  padding: 16px;
  border: none;
  text-align: left;
  outline: none;
  font-size: 18px;
}

.active, .collapsible:hover {
  background-color: #555;
}

.collapsible:after {
  content: '\002B';
  color: white;
  font-weight: bold;
  float: right;
  margin-left: 5px;
}

.active:after {
  content: "\2212";
}

.content {
  padding: 0px;
  margin-right: 50px;
  margin-left: 50px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
  background-color: #f1f1f1;
}

/* unvisited link */
a:link {
  color: rgb(77, 147, 187);
}

/* visited link */
a:visited {
  color: hotpink;
}