/* --- General Page Setup --- */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  background-color: #f1f1f1; /* light gray background */
  color: #333;
}

/* --- Navigation Bar --- */
.navbar {
  background-color: #04AA6D; /* green bar like W3Schools */
  overflow: hidden;
}

/* Navbar links */
.navbar a {
  float: left;
  color: white;
  text-align: center;
  padding: 14px 20px;
  text-decoration: none;
}

/* When mouse hovers over a link */
.navbar a:hover {
  background-color: #ddd;
  color: black;
}

/* The "active" link (home) */
.navbar a.active {
  background-color: #037f52;
}

/* --- Main Content --- */
.main {
  background-color: white;
  max-width: 800px;
  margin: 20px auto;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* Headings */
h1 {
  color: #04AA6D;
  text-align: center;
}

h2 {
  color: #04AA6D;
}

/* Profile picture */
.profile {
  display: block;
  margin: 20px auto;
  width: 150px;
  border-radius: 50%;
  border: 3px solid #04AA6D;
}

/* Lesson images */
.lesson-img {
  display: block;
  margin: 20px auto;
  width: 80%;
  max-width: 500px;
  border-radius: 8px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.2);
}

/* Lists */
ul {
  text-align: left;
  display: inline-block;
  margin: 10px auto;
}

/* Footer */
footer {
  text-align: center;
  font-size: 14px;
  color: #555;
  margin-top: 40px;
}