body {
  margin: 0;
  font-family: sans-serif;
  background-color: #121212;
  color: #fff;
  transition: background 0.3s, color 0.3s;
}
body.light {
  background-color: #f4f4f4;
  color: #222;
}
.theme-container {
  display: flex;
  justify-content: flex-end;
  padding: 1rem;
}
#theme-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}
header {
  text-align: center;
}
header img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
}
main {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 2rem;
}
.link-button {
  display: flex;
  align-items: center;
  background-color: #1f1f1f;
  color: white;
  padding: 1rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: transform 0.2s, background 0.3s;
}
.link-button svg {
  margin-right: 0.5rem;
  vertical-align: middle;
}
body.light .link-button {
  background-color: #e0e0e0;
  color: #222;
}
.link-button:hover {
  transform: scale(1.05);
}