body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f5f7fa;
}

nav {
  background: #2d3e50;
}

nav ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

nav li {
  flex: 1;
}

nav a {
  display: block;
  padding: 1em;
  color: #fff;
  text-align: center;
  text-decoration: none;
  transition: background 0.2s;
}

nav a.active, nav a:hover {
  background: #1a2533;
}

.tab-content {
  display: none;
  padding: 2em;
  max-width: 700px;
  margin: auto;
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
  margin-top: 2em;
  border-radius: 8px;
}

.tab-content.active {
  display: block;
}
.social-links {
  display: flex;
  gap: 16px;
  margin-top: 1em;
}

.social-icon svg {
  display: block;
  border-radius: 8px;
  transition: box-shadow 0.2s, transform 0.2s;
  box-shadow: 0 2px 4px rgba(0,0,0,0.08);
}

.social-icon:hover svg {
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  transform: scale(1.08);
}