/* background image */
* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: url("https://images.unsplash.com/photo-1763511872552-b5271585e22a?q=80&w=1287&auto=format&fit=crop&ixlib=rb-4.1.0&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D") no-repeat center center fixed;
  background-size: cover;
  padding-left: 15%;
}

/* Fixed sidebar on the left */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 15%;
  padding: 2%;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;

  overflow-y: auto;
}

.sidebar a {
  color: #ffffff;
}

.sidebar a:hover {
  text-decoration: underline;
}

.sidebar li {
  line-height: 1.4; 
}

/* Center the main content area */
.page-wrapper {
  max-width: 50%; 
  margin: 0 auto;
  padding: 40px 20px 60px;
  color: #fff;
}

.intro,
.main.supporting {
  background: rgba(43, 43, 43, 0.8);
  padding: 30px;
  margin-bottom: 20px;
  border-radius: 8px;
}


/* footer align center */
footer {
  text-align: center;
  margin-top: 20px;
}

a {
  color: #4ECFFF; 
  text-decoration: none;
}