:root {
  --bg-dark: #09090b;
  --border-color: #27272a; /* Zinc-800 */
  --border-hover: #52525b; /* Zinc-600 */
  --accent-lime: #a3e635;
  --accent-cyan: #22d3ee;
  --text-muted: #a1a1aa;
  --surface: #18181b; /* Zinc-900 */
}

body {
  background-color: var(--bg-dark);
  color: #e4e4e7;
  overflow-x: hidden;
  /* Static Noise Overlay */
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.05'/%3E%3C/svg%3E");
}

/* Typography Overrides */
h1, h2, h3, h4, .font-heading {
  font-family: 'Inter', sans-serif;
  letter-spacing: -0.02em;
}

.font-tech, .data-value, .label, small {
  font-family: 'Space Mono', monospace;
}

.label {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.65rem;
  color: var(--text-muted);
}

/* Utility / Industrial Card Style */
.tech-card {
  background-color: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: 6px; /* Small radius for engineered look */
  position: relative;
  transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
  box-shadow: 0 0 0 0 rgba(0,0,0,0);
}

/* Tactile Hover State: Sharp translate, no blur */
.tech-card.interactive:hover {
  transform: translate(-2px, -2px);
  border-color: var(--border-hover);
  box-shadow: 4px 4px 0 0 rgba(0,0,0,0.5); /* Hard shadow */
  z-index: 10;
}

/* Navbar Items */
.nav-item {
  font-family: 'Space Mono', monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.5rem 1rem;
  border: 1px solid transparent;
  border-radius: 4px;
  transition: all 0.2s ease;
  color: var(--text-muted);
}

.nav-item:hover {
  color: white;
  background-color: var(--border-color);
}

.nav-item.active {
  background-color: rgba(163, 230, 53, 0.1); /* Low opacity lime */
  border-color: var(--accent-lime);
  color: var(--accent-lime);
}

/* Bento Grid Layout Utilities */
.bento-grid {
  display: grid;
  gap: 1rem;
  grid-auto-rows: minmax(180px, auto);
}

/* Custom Inputs (Sliders/Selects) */
input[type="range"] {
  -webkit-appearance: none;
  background: var(--border-color);
  border-radius: 0;
  height: 2px;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  height: 12px;
  width: 12px;
  background: white;
  border: 1px solid black;
  cursor: pointer;
  border-radius: 0; /* Square thumb */
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--border-hover);
}

/* Animation utilities */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.3s ease-out forwards;
}