/* ============================================================
   SLH Neural — Design System Extension
   Theme: DNA + Neural Networks
   For: SLH Spark Investor-Grade UI/UX
   Author: Claude (2026-04-27)
   Loads AFTER shared.css. Adds [data-theme="neural"] + components.
   ============================================================ */

/* ── 1. Neural Theme (extends shared.css) ───────────────── */

[data-theme="neural"] {
  /* Deep cosmic backgrounds — feels like the brain at night */
  --bg: #03060f;
  --bg2: #060b1c;
  --bg3: #0a1230;
  --surface: rgba(15, 24, 56, 0.65);
  --surface2: rgba(22, 35, 80, 0.78);
  --border: rgba(94, 214, 255, 0.18);
  --border2: rgba(94, 214, 255, 0.35);

  /* Synapse-glow text — bright but readable */
  --text: #e7f1ff;
  --text2: #9bb3d4;
  --text3: #5a7090;

  /* Primary: synaptic cyan + electric purple */
  --accent: #5ed6ff;          /* synapse pulse */
  --accent2: #b18bff;         /* neuron glow */
  --gold: #ffd166;            /* SLH premium */
  --green: #4ade80;           /* ZVK reward */
  --cyan: #5ed6ff;
  --red: #ff5e87;             /* ZUZ warning */
  --orange: #ff9a3c;

  /* Per-token accents (used in node visualization) */
  --token-slh:  #ffd166;
  --token-mnh:  #c0c5cf;       /* metallic stable */
  --token-zvk:  #4ade80;
  --token-rep:  #5ed6ff;
  --token-zuz:  #ff5e87;

  /* Soft shadows + neon glows */
  --shadow:    0 4px 24px rgba(94, 214, 255, .08);
  --shadow-lg: 0 12px 60px rgba(177, 139, 255, .14);
  --glow-cyan: 0 0 24px rgba(94, 214, 255, 0.45);
  --glow-purple: 0 0 24px rgba(177, 139, 255, 0.45);
  --glow-gold: 0 0 24px rgba(255, 209, 102, 0.55);

  --radius: 14px;
  --radius-sm: 10px;
  --radius-xs: 6px;
}

/* ── 2. Background — ambient neural canvas ───────────────── */

.neural-bg {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(94, 214, 255, 0.12), transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 90%, rgba(177, 139, 255, 0.10), transparent 60%),
    radial-gradient(ellipse 100% 50% at 50% 50%, rgba(10, 18, 48, 0.6), transparent 70%),
    var(--bg);
  overflow: hidden;
}
.neural-bg::before {
  /* Animated grid representing neural lattice */
  content: '';
  position: absolute; inset: -2px;
  background-image:
    linear-gradient(rgba(94, 214, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(94, 214, 255, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 50% at 50% 40%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 50% at 50% 40%, #000 30%, transparent 80%);
  animation: neuralPan 60s linear infinite;
}
@keyframes neuralPan {
  from { background-position: 0 0, 0 0; }
  to   { background-position: 64px 64px, 64px 64px; }
}

/* ── 3. SVG building blocks ─────────────────────────────── */

.synapse-line {
  stroke: var(--accent);
  stroke-width: 1.5;
  fill: none;
  stroke-dasharray: 4 6;
  animation: synapseFlow 3s linear infinite;
  filter: drop-shadow(0 0 4px var(--accent));
  opacity: .6;
}
@keyframes synapseFlow {
  to { stroke-dashoffset: -40; }
}

.neuron-node {
  fill: var(--surface2);
  stroke: var(--accent);
  stroke-width: 2;
  filter: drop-shadow(0 0 10px var(--accent));
  transition: all .3s ease;
}
.neuron-node:hover {
  fill: var(--accent);
  filter: drop-shadow(0 0 20px var(--accent));
  cursor: pointer;
}

/* ── 4. Token nodes — each token a distinct neuron ──────── */

.token-node {
  position: relative;
  width: 96px; height: 96px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.4rem;
  color: var(--bg);
  background: radial-gradient(circle at 30% 30%, currentColor, rgba(0,0,0,.4));
  box-shadow:
    inset 0 0 20px rgba(255,255,255,.2),
    0 0 30px currentColor;
  transition: transform .3s ease;
  cursor: pointer;
}
.token-node::before {
  content: '';
  position: absolute; inset: -8px;
  border-radius: 50%;
  border: 1px solid currentColor;
  opacity: .5;
  animation: tokenPulse 2.5s ease-in-out infinite;
}
.token-node::after {
  content: '';
  position: absolute; inset: -16px;
  border-radius: 50%;
  border: 1px solid currentColor;
  opacity: .25;
  animation: tokenPulse 2.5s ease-in-out infinite .8s;
}
.token-node:hover { transform: scale(1.1); }
@keyframes tokenPulse {
  0%, 100% { transform: scale(1); opacity: .5; }
  50%      { transform: scale(1.15); opacity: 0; }
}

.token-node[data-token="SLH"] { color: var(--token-slh); }
.token-node[data-token="MNH"] { color: var(--token-mnh); }
.token-node[data-token="ZVK"] { color: var(--token-zvk); }
.token-node[data-token="REP"] { color: var(--token-rep); }
.token-node[data-token="ZUZ"] { color: var(--token-zuz); }

/* ── 5. Glassmorphism cards (investor-grade) ────────────── */

.neural-card {
  background: var(--surface);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: all .35s var(--transition);
}
.neural-card::before {
  /* subtle scan line for tech feel */
  content: '';
  position: absolute; top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(94,214,255,.06), transparent);
  transition: left .8s ease;
}
.neural-card:hover {
  border-color: var(--border2);
  box-shadow: var(--shadow-lg), var(--glow-cyan);
  transform: translateY(-2px);
}
.neural-card:hover::before { left: 100%; }

.neural-card .card-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  margin-bottom: 18px;
  font-size: 1.4rem;
  color: var(--bg);
  box-shadow: var(--glow-cyan);
}

/* ── 6. Hero / headlines ────────────────────────────────── */

.neural-headline {
  font-weight: 800;
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, #fff 0%, var(--accent) 40%, var(--accent2) 70%, var(--gold) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0 0 20px;
}

.neural-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px;
  font-size: .8rem; font-weight: 600; letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(94, 214, 255, 0.08);
  border: 1px solid var(--border);
  border-radius: 999px;
  margin-bottom: 18px;
}
.neural-eyebrow::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 8px var(--accent);
  animation: eyebrowPulse 1.6s ease-in-out infinite;
}
@keyframes eyebrowPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: .4; transform: scale(.7); }
}

/* ── 7. Buttons (CTA grade) ─────────────────────────────── */

.neural-btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 28px;
  font-family: var(--font); font-weight: 700; font-size: 1rem;
  border: none; border-radius: 12px;
  cursor: pointer;
  transition: all .25s var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}
.neural-btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: var(--bg);
  box-shadow: var(--glow-cyan);
}
.neural-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow-cyan), 0 8px 32px rgba(94,214,255,.35);
}
.neural-btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border2);
}
.neural-btn-ghost:hover {
  background: var(--surface2);
  border-color: var(--accent);
  color: var(--accent);
}
.neural-btn-gold {
  background: linear-gradient(135deg, #ffe18a, var(--gold));
  color: #2a1f00;
  box-shadow: var(--glow-gold);
}

/* ── 8. Stat / KPI tile ─────────────────────────────────── */

.neural-stat {
  text-align: center;
  padding: 20px;
}
.neural-stat .stat-value {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  font-variant-numeric: tabular-nums;
  margin-bottom: 4px;
}
.neural-stat .stat-label {
  font-size: .85rem; color: var(--text2);
  text-transform: uppercase; letter-spacing: .08em;
}

/* ── 9. Trust badges (audits, contracts) ────────────────── */

.trust-badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 10px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: .9rem;
  color: var(--text2);
  font-family: var(--font-mono);
}
.trust-badge .badge-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--green); box-shadow: 0 0 8px var(--green);
}

/* ── 10. DNA helix divider ──────────────────────────────── */

.dna-divider {
  height: 60px;
  position: relative;
  margin: 80px 0;
  overflow: hidden;
}
.dna-divider svg { width: 100%; height: 100%; }
.dna-strand {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  opacity: .6;
}
.dna-strand-2 {
  stroke: var(--accent2);
}
.dna-rung {
  stroke: var(--gold);
  stroke-width: 1.5;
  opacity: .4;
}

/* ── 11. Layout containers ──────────────────────────────── */

.neural-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.neural-grid {
  display: grid;
  gap: 24px;
}
.neural-grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.neural-grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.neural-grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.neural-section {
  padding: 80px 0;
  position: relative;
}

/* ── 12. Roadmap timeline ───────────────────────────────── */

.roadmap-timeline {
  position: relative;
  padding-inline-start: 32px;
  border-inline-start: 2px solid var(--border2);
}
.roadmap-item {
  position: relative;
  padding-bottom: 32px;
}
.roadmap-item::before {
  content: '';
  position: absolute;
  inset-inline-start: -42px; top: 4px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--surface2);
  border: 2px solid var(--accent);
  box-shadow: var(--glow-cyan);
}
.roadmap-item.done::before {
  background: var(--green);
  border-color: var(--green);
  box-shadow: 0 0 12px var(--green);
}
.roadmap-item.active::before {
  animation: tokenPulse 2s ease-in-out infinite;
}
.roadmap-item h4 {
  margin: 0 0 4px;
  font-size: 1.1rem;
  color: var(--text);
}
.roadmap-item p {
  margin: 0;
  color: var(--text2);
  font-size: .92rem;
  line-height: 1.6;
}
.roadmap-item .roadmap-date {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--accent);
  margin-bottom: 6px;
  display: block;
}

/* ── 13. Section header ─────────────────────────────────── */

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  margin: 12px 0;
  color: var(--text);
}
.section-header p {
  color: var(--text2);
  font-size: 1.05rem;
  line-height: 1.6;
}

/* ── 14. Live indicator (animated dot) ──────────────────── */

.live-indicator {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: .8rem;
  color: var(--green);
}
.live-indicator::before {
  content: ''; width: 8px; height: 8px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 0 rgba(74, 222, 128, .6);
  animation: liveBlink 1.4s ease-in-out infinite;
}
@keyframes liveBlink {
  0%   { box-shadow: 0 0 0 0 rgba(74, 222, 128, .6); }
  70%  { box-shadow: 0 0 0 8px rgba(74, 222, 128, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

/* ── 15. Responsive tweaks ──────────────────────────────── */

@media (max-width: 720px) {
  .neural-card { padding: 20px; }
  .neural-section { padding: 56px 0; }
  .neural-headline { font-size: clamp(1.8rem, 8vw, 2.6rem); }
}

/* ── 16. Reduced motion ─────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .neural-bg::before,
  .synapse-line,
  .token-node::before,
  .token-node::after,
  .neural-eyebrow::before,
  .live-indicator::before,
  .roadmap-item.active::before {
    animation: none !important;
  }
}