:root {
  /* Theme Colors */
  --nv-ink: #000000;          /* Pure Black */
  --nv-accent: #d4af37;       /* Warm Gold */
  --nv-glow: #d4af37;         /* Warm Gold Glow */
  --nv-surface: #0d0d0d;      /* Deep Space Surface */
  --nv-muted: #a0a0a0;         /* Muted text */
  
  /* UI Elements */
  --nv-radius: 8px;
  --nv-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 20px rgba(212, 175, 55, 0.1);
  --nv-transition: 250ms ease-out;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: var(--nv-ink);
  color: #ffffff;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Layout & Containers */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 120px 0;
  position: relative;
}

/* Header & Navigation */
header {
  padding: 1.5rem 0;
  position: relative;
  z-index: 10;
}

header.nv-shrunk {
  padding: 10px 0;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 207, 64, 0.2);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 207, 64, 0.2);
}

.logo {
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: 1px;
  color: var(--nv-accent);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--nv-accent);
}

/* the page you are on: gold + underline (from Home; one place for every page - Claude smoothing 2026-11-08) */
.nav-links a[aria-current="page"] {
  color: var(--nv-accent);
  border-bottom: 2px solid var(--nv-accent);
}

/* Typography */
h1, h2, h3 {
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

h1 { font-size: clamp(3rem, 8vw, 5rem); }
h2 { font-size: clamp(2rem, 6vw, 3.5rem); }
h3 { font-size: 1.5rem; }

p {
  font-size: 1.1rem;
  max-width: 700px;
  margin-bottom: 1.5rem;
  color: #e0e0e0;
}

/* Components */
.btn {
  display: inline-block;
  padding: 16px 32px;
  border-radius: var(--nv-radius);
  background: var(--nv-accent);
  color: var(--nv-ink);
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s;
  border: none;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(212, 175, 55, 0.4);
}

/* Cards */
.card {
  background: var(--nv-surface);
  padding: 40px;
  border-radius: var(--nv-radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: transform 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card[data-border="gilded"] {
  border: 2px solid var(--nv-accent);
  box-shadow: var(--nv-shadow);
}

.card[data-tilt] {
  transform-style: preserve-3d;
}

/* Hero Section */
[data-hero] {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

[data-hero] canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

/* Content Styling */
.gradient-text {
  background: linear-gradient(90deg, var(--nv-accent), var(--nv-glow));
  -webkit-background-clip: text;
  -webkit-text-fill: color;
}

.highlight-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 60px;
}

/* Tabs */
[data-tabs] {
  margin-top: 40px;
}

[data-tabs] .tab-buttons {
  display: flex;
  gap: 10px;
  margin-bottom: 30px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  padding-bottom: 10px;
}

[data-tabs] button {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.2);
  padding: 10px 20px;
  color: white;
  border-radius: 4px;
  cursor: pointer;
}

[data-tabs] button.active {
  background: var(--nv-accent);
  color: var(--nv-ink);
  border-color: var(--nv-accent);
}

/* Accordion */
[data-accordion] details {
  background: var(--nv-surface);
  padding: 20px;
  border-radius: var(--nv-radius);
  margin-bottom: 15px;
  border: 1px solid rgba(255,255,255,0.05);
}

[data-accordion] summary {
  font-weight: bold;
  cursor: pointer;
  color: var(--nv-accent);
}

/* Divider */
[data-divider] {
  height: 4px;
  width: 100%;
  margin: 60px 0;
  background: linear-gradient(90deg, transparent, var(--nv-accent), transparent);
}

/* Footer */
footer {
  padding: 60px 0;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  font-size: 0.9rem;
  color: var(--nv-muted);
}

/* Responsive */
@media (max-width: 768px) {
  /* PHONES (Tank 2026-11-08: "needs to work for mobile and pc"): the menu was hidden here with no
     menu button to replace it - a phone visitor could not reach any other page. Now the logo sits on
     top and all six links wrap in a centred row under it, always visible, each a comfortable tap target.
     The PC layout above 768 px is unchanged. */
  nav {
    flex-direction: column;
    gap: 0.55rem;
    padding: 0.9rem 1rem 0.7rem;
  }
  .nav-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.25rem 1.1rem;
  }
  .nav-links a {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    font-size: 0.95rem;
  }

  .container {
    padding: 0 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}