:root {
  --bg: #0a0a0c;
  --bg-elevated: #111115;
  --bg-card: #16161b;
  --fg: #e8e6e3;
  --fg-muted: #8a8a95;
  --accent: #c8ff00;
  --accent-dim: rgba(200, 255, 0, 0.12);
  --strike: #ff4444;
  --radius: 12px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ===== HERO ===== */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding: 80px 40px 60px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-dim) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 80px;
  align-items: center;
  width: 100%;
}

.badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 5.5vw, 4.5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
}

.hero h1 .highlight {
  color: var(--accent);
}

.lede {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 520px;
  line-height: 1.7;
}

/* Aperture visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.aperture-ring {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  position: relative;
  background: var(--bg-elevated);
  border: 2px solid rgba(200, 255, 0, 0.15);
}

.ring-segment {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 1px solid rgba(200, 255, 0, 0.06);
}

.seg-1 { transform: scale(0.85); border-color: rgba(200, 255, 0, 0.1); }
.seg-2 { transform: scale(0.7); border-color: rgba(200, 255, 0, 0.15); }
.seg-3 { transform: scale(0.55); border-color: rgba(200, 255, 0, 0.2); }
.seg-4 { transform: scale(0.4); border-color: rgba(200, 255, 0, 0.25); }
.seg-5 { transform: scale(0.25); border-color: rgba(200, 255, 0, 0.35); }

.ring-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.ring-label {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--bg);
  letter-spacing: 0.05em;
}

/* ===== CONTRAST ===== */
.contrast {
  padding: 80px 40px;
  background: var(--bg-elevated);
}

.contrast-inner {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 40px;
  align-items: start;
}

.contrast-col h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.contrast-col.old h3 { color: var(--fg-muted); }
.contrast-col.new h3 { color: var(--accent); }

.contrast-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contrast-col ul li {
  font-size: 1rem;
  color: var(--fg);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.strike {
  text-decoration: line-through;
  color: var(--fg-muted);
  text-decoration-color: var(--strike);
}

.time {
  font-size: 0.8rem;
  color: var(--fg-muted);
  background: rgba(255, 68, 68, 0.1);
  padding: 2px 10px;
  border-radius: 100px;
}

.contrast-total {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--fg-muted);
}

.contrast-total.highlight {
  color: var(--accent);
}

.contrast-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 40px;
}

.arrow-down {
  width: 2px;
  height: 80px;
  background: linear-gradient(to bottom, var(--fg-muted), var(--accent));
  position: relative;
}

.arrow-down::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 8px solid var(--accent);
}

/* ===== FEATURES ===== */
.features {
  padding: 100px 40px;
}

.features-header {
  max-width: 1200px;
  margin: 0 auto 60px;
}

.features-header h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.features-header p {
  font-size: 1.1rem;
  color: var(--fg-muted);
}

.feature-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: var(--radius);
  padding: 40px;
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: rgba(200, 255, 0, 0.15);
}

.feature-icon {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* ===== CLOSING ===== */
.closing {
  padding: 100px 40px;
  background: var(--bg-elevated);
  text-align: center;
}

.closing-inner {
  max-width: 700px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 20px;
}

.closing p {
  font-size: 1.1rem;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* ===== FOOTER ===== */
.site-footer {
  padding: 40px;
  border-top: 1px solid rgba(255,255,255,0.04);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--fg);
}

.footer-sep {
  color: var(--fg-muted);
}

.footer-note {
  color: var(--fg-muted);
  font-size: 0.85rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: 60px 20px 40px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual {
    display: none;
  }

  .contrast-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .contrast-divider {
    display: none;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .features,
  .closing {
    padding: 60px 20px;
  }

  .contrast {
    padding: 60px 20px;
  }

  .feature-card {
    padding: 28px;
  }
}