/* Top Bar */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 40px;
  background: #161b22;
  border-bottom: 1px solid #30363d;
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-size: 1.4rem;
  font-weight: bold;
  color: #58a6ff;
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-links a {
  text-decoration: none;
  color: #c9d1d9;
  position: relative;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: #58a6ff;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0%;
  height: 2px;
  background: #58a6ff;
  transition: width 0.3s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

/* Hamburger for mobile */
.hamburger {
  display: none;
  font-size: 1.8rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    background: #161b22;
    position: absolute;
    top: 60px;
    right: 0;
    width: 200px;
    padding: 20px;
  }

  .nav-links.active {
    display: flex;
  }

  .hamburger {
    display: block;
  }
}