/* =============================================
   header.css — Fixed top nav bar
   ============================================= */

header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 40px;
  background: var(--bg0);
  border-bottom: 2px solid var(--bg1);
}

.logo {
  font-family: 'Press Start 2P', monospace;
  font-size: 14px;
  color: var(--yellow-b);
  text-shadow: 0 0 10px var(--yellow);
  letter-spacing: 2px;
}
.logo span { color: var(--orange-b); }

nav a {
  font-family: 'Share Tech Mono', monospace;
  font-size: 12px;
  color: var(--fg2);
  text-decoration: none;
  margin-left: 30px;
  text-transform: uppercase;
  letter-spacing: 2px;
  transition: color 0.2s;
  position: relative;
}
nav a::before {
  content: '> ';
  color: var(--green-b);
  opacity: 0;
  transition: opacity 0.2s;
}
nav a:hover { color: var(--yellow-b); }
nav a:hover::before { opacity: 1; }

@media (max-width: 600px) {
  header { padding: 14px 24px; }
  nav { display: none; }
}