:root {
  --bg: #0a0b0f;
  --bg-elevated: #12141c;
  --bg-card: #161822;
  --fg: #e8e9ed;
  --fg-muted: #8b8d9a;
  --accent: #00e5a0;
  --accent-dim: rgba(0, 229, 160, 0.12);
  --accent-glow: rgba(0, 229, 160, 0.25);
  --danger: #ff4d6a;
  --border: rgba(255, 255, 255, 0.06);
  --font-heading: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-w: 1120px;
}

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

html { scroll-behavior: smooth; }

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

/* ---- NAV ---- */
.nav {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 28px 24px;
}
.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--accent);
  font-family: var(--font-mono);
}

/* ---- HERO ---- */
.hero {
  position: relative;
  overflow: hidden;
  padding-bottom: 100px;
}
.hero-content {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 60px 24px 0;
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid rgba(0, 229, 160, 0.2);
  margin-bottom: 32px;
}
h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
}
.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 48px;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.stat-num {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--accent);
  display: block;
}
.stat-label {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-top: 4px;
  display: block;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}
.hero-glow {
  position: absolute;
  top: -200px;
  right: -150px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  z-index: 1;
  pointer-events: none;
}

/* ---- PROBLEM ---- */
.problem {
  padding: 80px 0;
  border-top: 1px solid var(--border);
}
.problem-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 48px;
}
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 36px 28px;
}
.problem-icon {
  font-size: 1.5rem;
  margin-bottom: 20px;
}
.problem-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.problem-card p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* ---- FEATURES ---- */
.features {
  padding: 80px 0;
  border-top: 1px solid var(--border);
}
.features-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.feature-row {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 36px 0;
  border-bottom: 1px solid var(--border);
}
.feature-row:first-child {
  border-top: 1px solid var(--border);
}
.feature-number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  min-width: 36px;
  padding-top: 4px;
}
.feature-content {
  flex: 1;
}
.feature-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.feature-content p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.65;
  max-width: 560px;
}
.feature-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
  background: var(--bg-elevated);
  padding: 4px 12px;
  border-radius: 4px;
  border: 1px solid var(--border);
  white-space: nowrap;
  margin-top: 4px;
}

/* ---- HOW / COMPARISON ---- */
.how {
  padding: 80px 0;
  border-top: 1px solid var(--border);
}
.how-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
.comparison {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: stretch;
}
.comparison-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 36px 28px;
}
.comparison-col.new {
  border-color: rgba(0, 229, 160, 0.3);
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(0, 229, 160, 0.04) 100%);
}
.comparison-header {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  margin-bottom: 24px;
  color: var(--fg-muted);
}
.comparison-col.new .comparison-header {
  color: var(--accent);
}
.comparison-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.comparison-col li {
  font-size: 0.95rem;
  color: var(--fg-muted);
  padding-left: 20px;
  position: relative;
}
.comparison-col.old li::before {
  content: '\00D7';
  position: absolute;
  left: 0;
  color: var(--danger);
  font-weight: 600;
}
.comparison-col.new li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 600;
}
.comparison-col.new li {
  color: var(--fg);
}
.comparison-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--fg-muted);
}

/* ---- CLOSING ---- */
.closing {
  padding: 120px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}
.closing-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}
.closing h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}
.closing-sub {
  font-size: 1.05rem;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* ---- FOOTER ---- */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-brand {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent);
}
.footer-tagline {
  font-size: 0.85rem;
  color: var(--fg-muted);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .problem-grid {
    grid-template-columns: 1fr;
  }
  .feature-row {
    flex-direction: column;
    gap: 12px;
  }
  .feature-tag {
    align-self: flex-start;
  }
  .comparison {
    grid-template-columns: 1fr;
  }
  .comparison-arrow {
    transform: rotate(90deg);
    padding: 8px 0;
  }
  .hero-stats {
    gap: 20px;
  }
  .stat-divider {
    display: none;
  }
  .footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}