.header-quantum {
  background: linear-gradient(135deg, #0a0e17, #1e3c72);
  padding: 35px 0;
  position: relative;
  overflow: hidden;
}
.header-quantum::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('https://www.transparenttextures.com/patterns/digital.png');
  opacity: 0.3;
  animation: quantumShift 30s linear infinite;
}
.header-quantum .header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}
.header-quantum .logo img {
  max-height: 70px;
  filter: drop-shadow(0 0 10px #00b7eb);
  transition: filter 0.4s ease;
}
.header-quantum .logo img:hover {
  filter: drop-shadow(0 0 20px #00b7eb);
}
.header-quantum .nav ul {
  display: flex;
  gap: 30px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.header-quantum .nav ul li a {
  font-size: 18px;
  font-weight: 600;
  color: #00b7eb;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 15px;
  border: 1px solid rgba(0, 183, 235, 0.3);
  border-radius: 5px;
  transition: all 0.3s ease;
  position: relative;
}
.header-quantum .nav ul li a:hover {
  color: #ffffff;
  background: rgba(0, 183, 235, 0.2);
  border-color: #ffffff;
  transform: scale(1.05);
  box-shadow: 0 0 15px rgba(0, 183, 235, 0.5);
}
.header-quantum .nav ul li a::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, rgba(0, 183, 235, 0.3), transparent);
  transform: translate(-50%, -50%) scale(0);
  transition: transform 0.3s ease;
}
.header-quantum .nav ul li a:hover::after {
  transform: translate(-50%, -50%) scale(1);
}
@keyframes quantumShift {
  0% { background-position: 0 0; }
  100% { background-position: 1000px 1000px; }
}