.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: #fff;
  border-bottom: 1px solid #ddd;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-sizing: border-box;
  z-index: 1000;
}

.social-icons a img {
  width: 30px;
  height: 30px;
  margin-right: 15px;
  vertical-align: middle;
}

.site-nav {
  display: flex;
  gap: 20px;
}

.site-nav a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  white-space: nowrap;
}

.site-nav a:hover {
  text-decoration: underline;
}

.page-container {
  display: flex;
  gap: 2rem;
  margin-top: 70px; /* push whole container below header */
}

.sidebar {
  width: 220px;
  background: #f9f9f9;
  border-right: 1px solid #ddd;
  padding: 1rem;
  flex-shrink: 0;
  position: sticky;
  top: 70px; /* same as header height */
  height: calc(100vh - 70px); /* fill the remaining viewport height */
  overflow-y: auto; /* scroll if content exceeds sidebar height */
}
.sidebar ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.sidebar li {
  margin-bottom: 0.4rem;
}

.sidebar a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  display: block;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
}

.sidebar a:hover {
  background-color: #e4e4e4;
}

.site-content {
  flex: 1;
}

/* Mobile layout */
@media (max-width: 768px) {
  .page-container {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid #ddd;
  }
}

.profile-pic {
  width: 300px;     /* change this */
  height: auto;     /* keeps aspect ratio */
}