.header-smoke {
  background: linear-gradient(180deg, #1c2526, #3a4040);
  padding: 35px 0;
  position: relative;
  overflow: hidden;
}
.header-smoke::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent);
  opacity: 0.5;
  animation: smokeDrift 25s ease-in-out infinite;
}
.header-smoke .header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}
.header-smoke .logo img {
  max-height: 70px;
  filter: drop-shadow(0 0 15px rgba(255, 255, 255, 0.5));
  transition: opacity 0.5s ease;
}
.header-smoke .logo img:hover {
  opacity: 0.8;
}
.header-smoke .nav ul {
  display: flex;
  gap: 30px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.header-smoke .nav ul li a {
  font-size: 18px;
  font-weight: 600;
  color: #b0bec5;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 15px;
  transition: all 0.5s ease;
  position: relative;
}
.header-smoke .nav ul li a:hover {
  color: #ffffff;
  transform: translateY(-5px);
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.7);
}
.header-smoke .nav ul li a::before {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  color: #ffffff;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
}
.header-smoke .nav ul li a:hover::before {
  opacity: 0.5;
  transform: translateY(0);
}
@keyframes smokeDrift {
  0% { transform: scale(1) translate(0, 0); }
  50% { transform: scale(1.2) translate(50px, 50px); }
  100% { transform: scale(1) translate(0, 0); }
}