body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  max-width: 800px;
  margin: auto;
  padding: 20px;
  color: #333;
  background-color: #f9f9f9;
}

header {
  text-align: center;
  margin-bottom: 40px;
}

.profile-pic {
  width: 250px;
  height: 250px;
  object-fit: cover;
  border-radius: 50%;
  display: block;
  margin: 0 auto 1rem auto;
  box-shadow: 0 0 8px rgba(0,0,0,0.2);
}

h1, h2 {
  color: #003366;
}

ul {
  padding-left: 20px;
}

/* Links */
a {
  color: #0066cc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  text-align: center;
  margin-top: 40px;
  font-size: 0.9em;
  color: #777;
}

/* Navigation buttons */
nav {
  margin-bottom: 20px;
  text-align: center;
}

nav button {
  background-color: #eee;
  border: none;
  padding: 8px 16px;
  margin: 0 5px;
  cursor: pointer;
  font-size: 1rem;
  border-radius: 4px;
  transition: background-color 0.3s ease;
}

nav button.active,
nav button:hover {
  background-color: #0077cc;
  color: white;
}

/* Sections visibility */
section {
  display: none;
}

/* Show the active main section */
section.active {
  display: block;
}

/* Show nested sections inside the active section */
section.active > section {
  display: block;
}

/* Justify paragraph text in About Me */
#about p {
  text-align: justify;
  text-justify: inter-word;
}