.header-liquid {
  background: linear-gradient(135deg, #b0b0b0, #4a4a4a);
  padding: 40px 0;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.5);
}
.header-liquid::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.3), transparent 70%);
  animation: liquidFlow 10s linear infinite;
}
.header-liquid .header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}
.header-liquid .logo img {
  max-height: 80px;
  filter: drop-shadow(0 0 15px rgba(255, 255, 255, 0.7));
  transition: transform 0.5s ease;
}
.header-liquid .logo img:hover {
  transform: rotateX(20deg);
}
.header-liquid .nav ul {
  display: flex;
  gap: 40px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.header-liquid .nav ul li a {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: linear-gradient(45deg, #888, #ccc);
  border-radius: 12px;
  transition: all 0.4s ease;
  position: relative;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}
.header-liquid .nav ul li a:hover {
  background: linear-gradient(45deg, #ccc, #fff);
  transform: translateY(-10px);
  box-shadow: 0 5px 20px rgba(255, 255, 255, 0.5);
}
.header-liquid .nav ul li a::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  width: calc(100% + 4px);
  height: calc(100% + 4px);
  border-radius: 12px;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.5), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}
.header-liquid .nav ul li a:hover::before {
  opacity: 1;
}
@keyframes liquidFlow {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-50%, -50%); }
}