/**
 * STICKY RACK NAVIGATION
 * Hardware-inspired section indicators with glowing LEDs
 */

.rack-nav-sticky {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: linear-gradient(180deg, #0a0a0a 0%, rgba(10, 10, 10, 0.95) 100%);
  border-bottom: 2px solid var(--crs-border);
  backdrop-filter: blur(10px);
  transform: translateY(-100%);
  transition: transform 0.3s ease-out;
}

.rack-nav-sticky.visible {
  transform: translateY(0);
}

.rack-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.rack-nav-logo {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--brass);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
}

.rack-nav-sections {
  display: flex;
  gap: 0.5rem;
  flex: 1;
  justify-content: center;
  align-items: center;
}

.rack-nav-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: rgba(26, 26, 26, 0.5);
  border: 1px solid var(--crs-border);
  border-radius: 4px;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--crs-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all 0.2s ease;
  cursor: pointer;
}

.rack-nav-item:hover {
  border-color: var(--amber);
  color: var(--crs-text);
  background: rgba(26, 26, 26, 0.8);
}

.rack-nav-item.active {
  border-color: var(--neon-green);
  color: var(--crs-text);
  background: rgba(57, 255, 20, 0.05);
}

.rack-nav-led {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--crs-border);
  transition: all 0.3s ease;
}

.rack-nav-item.active .rack-nav-led {
  background: var(--neon-green);
  box-shadow: 0 0 8px var(--neon-green), 0 0 12px rgba(57, 255, 20, 0.3);
  animation: led-pulse 2s ease-in-out infinite;
}

.rack-nav-item:hover .rack-nav-led {
  background: var(--amber);
  box-shadow: 0 0 6px var(--amber);
}

/* CTA Button in Nav */
.rack-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: #000000;
  color: var(--amber);
  border: 2px solid var(--amber);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  text-decoration: none;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.rack-nav-cta:hover {
  background: var(--amber);
  color: #000000;
  box-shadow: 0 0 12px var(--amber-glow);
}

/* Scroll Progress Bar */
.rack-nav-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--neon-green);
  box-shadow: 0 0 4px var(--neon-green);
  transition: width 0.1s ease-out;
  width: 0%;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .rack-nav-sections {
    gap: 0.25rem;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  
  .rack-nav-sections::-webkit-scrollbar {
    display: none;
  }
  
  .rack-nav-item {
    padding: 0.5rem;
    font-size: 0.65rem;
  }
  
  .rack-nav-item span {
    display: none;
  }
  
  .rack-nav-logo {
    font-size: 0.75rem;
  }
  
  .rack-nav-cta {
    padding: 0.5rem 0.75rem;
    font-size: 0.65rem;
  }
}

/* Section Anchors (invisible scroll targets) */
.rack-section-anchor {
  position: absolute;
  top: -80px;
  visibility: hidden;
}