body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f4f4;
}

header {
  background: #222;
  color: white;
  padding: 1rem;
  text-align: center;
}

.logo {
  max-height: 100px;
  width: auto;
  display: block;
  margin: 0 auto 0.5rem;
  border-radius: 50%;        /* Makes it a circle */
  border: 4px solid white;   /* Adds white border around it */
  background-color: white;   /* Optional: ensures the background is white too */
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);  /* Optional: soft shadow for contrast */
}

nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  background: #ddd;
  padding: 0.5rem;
}

nav button {
  margin: 0.3rem;
  padding: 0.5rem 1rem;
  border: none;
  background: #333;
  color: white;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

nav button:hover {
  background: #555;
}

/* Add styling for active button */
nav button.active {
  background: #0077cc;
  box-shadow: 0 0 4px rgba(0, 119, 204, 0.5);
}

main {
  padding: 1rem;
}

.bookmark {
  background: white;
  margin: 0.5rem 0;
  padding: 1rem;
  border-radius: 4px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.bookmark a {
  text-decoration: none;
  color: #0077cc;
  font-weight: bold;
}

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