/* header.css */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 50px;
  z-index: 1000;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(20px);
  padding: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.logo img {
  height: 30px;
  padding: 0 0.5rem;
}

nav a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s ease;
}
nav a:hover, nav a.active {
  color: rgba(255,255,255,1);
}
.header-right a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s ease;
}
.header-right a:hover {
  color: rgba(255,255,255,1);
}