/* ============================================
   JD Codec — Design System
   "Signal Noir" — dark, precise, electric accents
   ============================================ */

:root {
  --accent: #3cffd0;
  --accent-glow: rgba(60, 255, 208, 0.12);
  --accent-warm: #ffd43b;
  --bg: #05070a;
  --surface: #0c0f16;
  --surface-2: #141820;
  --surface-3: #1c2030;
  --border: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(60, 255, 208, 0.15);
  --text: #e4e7ec;
  --text-muted: #6e7381;
  --text-dim: #3d4250;
  --green: #22c55e;
  --red: #ef4444;
}

/* Text selection */
::selection {
  background: rgba(60, 255, 208, 0.25);
  color: #fff;
}

/* Grain texture overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 128px 128px;
}

/* Background radial glow */
body::after {
  content: '';
  position: fixed;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 120%;
  height: 60%;
  background: radial-gradient(ellipse at center, rgba(60, 255, 208, 0.03) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* Typography overrides */
.font-display {
  font-family: 'Instrument Serif', Georgia, serif;
}
.font-body {
  font-family: 'Figtree', system-ui, sans-serif;
}
.font-mono {
  font-family: 'Fira Code', monospace;
}

/* Headline tight tracking */
h1, h2, h3 {
  letter-spacing: -0.03em;
}

/* Body line height */
body {
  line-height: 1.7;
}

/* ============================================
   Components
   ============================================ */

/* Metric cards */
.metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem 1.5rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 0.3s ease;
}

.metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.6;
}

.metric-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow),
              0 0 0 1px var(--border-accent);
}

/* Form input */
.waitlist-input {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.875rem 1.25rem;
  color: var(--text);
  font-family: 'Figtree', system-ui, sans-serif;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
}

.waitlist-input::placeholder {
  color: var(--text-dim);
}

.waitlist-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Submit button */
.waitlist-btn {
  background: var(--accent);
  color: #05070a;
  font-family: 'Figtree', system-ui, sans-serif;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  padding: 0.875rem 2rem;
  cursor: pointer;
  transition: transform 0.15s cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 0.2s ease,
              opacity 0.15s ease;
  white-space: nowrap;
}

.waitlist-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.waitlist-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.waitlist-btn:active {
  transform: translateY(0);
}

.waitlist-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ============================================
   Race animation
   ============================================ */

.race-panel {
  transition: box-shadow 0.3s ease;
}

.race-check {
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.race-step span {
  transition: color 0.3s ease;
}

/* Tabular nums for counters */
#race-left-tokens, #race-left-cost, #race-left-time,
#race-right-tokens, #race-right-cost, #race-right-time {
  font-variant-numeric: tabular-nums;
}

/* ============================================
   Results table
   ============================================ */

.results-table {
  width: 100%;
  border-collapse: collapse;
}

.results-table th {
  text-align: left;
  padding: 0.625rem 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--border);
}

.results-table td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.results-table tr:last-child td {
  border-bottom: none;
}

.results-table .totals-row {
  background: var(--surface-2);
  font-weight: 700;
}

.results-table .totals-row td {
  border-top: 2px solid rgba(255, 255, 255, 0.08);
}

/* Reduction badge */
.reduction-badge {
  color: var(--accent);
  font-weight: 700;
  font-family: 'Fira Code', monospace;
}

/* Pass/fail indicators */
.pass { color: var(--green); font-weight: 600; }
.fail { color: var(--red); font-weight: 600; }

/* ============================================
   Steps section
   ============================================ */

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Fira Code', monospace;
  font-weight: 600;
  color: var(--accent);
  font-size: 0.875rem;
  flex-shrink: 0;
}

/* ============================================
   Section reveal animations
   ============================================ */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 0.08s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 0.16s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 0.24s; opacity: 1; transform: translateY(0); }

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 768px) {
  .demo-panel-body {
    height: 240px;
  }
}

/* ============================================
   Form states
   ============================================ */

.form-success {
  animation: fadeInUp 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(5, 7, 10, 0.3);
  border-top-color: #05070a;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}