:root {
  --bg: #0a0e14;
  --bg-elevated: #111820;
  --bg-card: #151c26;
  --fg: #e6edf5;
  --fg-muted: #7a8ba3;
  --fg-dim: #4a5568;
  --accent: #00d9a6;
  --accent-glow: rgba(0, 217, 166, 0.12);
  --accent-dim: #00b88a;
  --border: #1e2a3a;
  --font-body: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* { 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;
}

/* === NAV === */
.nav {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(10, 14, 20, 0.92);
  backdrop-filter: blur(12px);
  z-index: 100;
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.logo-icon {
  color: var(--accent);
  font-size: 1.4rem;
  line-height: 1;
}
.logo-text {
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}
.nav-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
}

/* === HERO === */
.hero {
  padding: 8rem 2rem 6rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--accent);
  border: 1px solid rgba(0, 217, 166, 0.3);
  padding: 0.35rem 1rem;
  border-radius: 2rem;
  margin-bottom: 2rem;
}
h1 {
  font-size: clamp(2.5rem, 6vw, 4.2rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}
.hero-accent {
  color: var(--accent);
}
.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 580px;
  margin: 0 auto 3rem;
  line-height: 1.7;
}
.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}
.stat-num {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--accent);
}
.stat-label {
  font-size: 0.8rem;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* === PROBLEM === */
.problem {
  padding: 6rem 2rem;
  background: var(--bg-elevated);
}
.problem-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.section-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 3rem;
}
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
}
.problem-icon {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--fg-dim);
  margin-bottom: 1.2rem;
}
.problem-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}
.problem-card p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* === FEATURES === */
.features {
  padding: 6rem 2rem;
}
.features-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.feature-list {
  display: flex;
  flex-direction: column;
}
.feature-row {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 2rem;
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--border);
  align-items: baseline;
}
.feature-row:first-child {
  border-top: 1px solid var(--border);
}
.feature-name {
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.feature-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.feature-desc {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* === HOW === */
.how {
  padding: 6rem 2rem;
  background: var(--bg-elevated);
}
.how-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.how-content {
  max-width: 800px;
}
.how-lead {
  font-size: 1.3rem;
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: 3rem;
  letter-spacing: -0.01em;
}
.how-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
.how-old, .how-new {
  padding: 2rem;
  border-radius: 8px;
}
.how-old {
  background: rgba(255, 80, 80, 0.06);
  border: 1px solid rgba(255, 80, 80, 0.15);
}
.how-new {
  background: var(--accent-glow);
  border: 1px solid rgba(0, 217, 166, 0.2);
}
.how-old h4, .how-new h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.2rem;
}
.how-old h4 { color: #ff5050; }
.how-new h4 { color: var(--accent); }
.how-old ul, .how-new ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.how-old li, .how-new li {
  font-size: 0.9rem;
  color: var(--fg-muted);
  padding-left: 1rem;
  position: relative;
}
.how-old li::before {
  content: '\2013';
  position: absolute;
  left: 0;
  color: rgba(255, 80, 80, 0.5);
}
.how-new li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* === CLOSING === */
.closing {
  padding: 8rem 2rem;
  text-align: center;
  position: relative;
}
.closing::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}
.closing-inner {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}
.closing h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}
.closing-sub {
  font-size: 1.05rem;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* === FOOTER === */
.footer {
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
}
.footer-tagline {
  font-size: 0.85rem;
  color: var(--fg-muted);
}
.footer-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-dim);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .hero { padding: 5rem 1.5rem 4rem; }
  .problem-grid { grid-template-columns: 1fr; }
  .feature-row { grid-template-columns: 1fr; gap: 0.5rem; }
  .how-comparison { grid-template-columns: 1fr; }
  .hero-stats { gap: 1.5rem; }
  .stat-divider { display: none; }
  .nav-tag { display: none; }
  .closing { padding: 5rem 1.5rem; }
  .footer-inner { flex-direction: column; text-align: center; }
}