:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-card: #161616;
  --fg-primary: #f0f0f0;
  --fg-secondary: #888888;
  --fg-muted: #555555;
  --accent: #c8ff00;
  --accent-dim: rgba(200, 255, 0, 0.08);
  --accent-glow: rgba(200, 255, 0, 0.15);
  --border: #222222;
  --radius: 16px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 80px 24px 120px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--accent-dim);
  border: 1px solid rgba(200, 255, 0, 0.2);
  border-radius: 100px;
  font-size: 0.8rem;
  font-family: var(--font-body);
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 40px;
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

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

.hero-sub {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: var(--fg-secondary);
  max-width: 540px;
  line-height: 1.5;
  position: relative;
  z-index: 1;
}

/* ── Divider ── */
.section-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

/* ── Problem Section ── */
.problem {
  padding: 120px 24px;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.problem h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  line-height: 1.15;
}

.problem p {
  font-size: 1.15rem;
  color: var(--fg-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── Features ── */
.features {
  padding: 80px 24px 120px;
  max-width: 1100px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.feature-card {
  background: var(--bg-card);
  padding: 48px 36px;
  position: relative;
  overflow: hidden;
  transition: background 0.3s ease;
}

.feature-card:first-child {
  border-radius: var(--radius) 0 0 0;
}

.feature-card:nth-child(3) {
  border-radius: 0 var(--radius) 0 0;
}

.feature-card:nth-child(4) {
  border-radius: 0 0 0 var(--radius);
}

.feature-card:last-child {
  border-radius: 0 0 var(--radius) 0;
}

.feature-card:hover {
  background: #1a1a1a;
}

.feature-number {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 20px;
  display: block;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--fg-secondary);
  line-height: 1.6;
}

/* ── Stats ── */
.stats {
  padding: 100px 24px;
  background: var(--bg-secondary);
}

.stats-inner {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  text-align: center;
}

.stat-item .stat-number {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 12px;
}

.stat-item .stat-label {
  font-size: 0.95rem;
  color: var(--fg-secondary);
}

/* ── Closing ── */
.closing {
  padding: 140px 24px;
  text-align: center;
  position: relative;
}

.closing::before {
  content: '';
  position: absolute;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.closing p {
  font-size: 1.15rem;
  color: var(--fg-secondary);
  max-width: 500px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* ── Footer ── */
footer {
  padding: 40px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

footer p {
  font-size: 0.8rem;
  color: var(--fg-muted);
  letter-spacing: 0.05em;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
    gap: 1px;
  }

  .feature-card {
    padding: 36px 28px;
    border-radius: 0 !important;
  }

  .feature-card:first-child {
    border-radius: var(--radius) var(--radius) 0 0 !important;
  }

  .feature-card:last-child {
    border-radius: 0 0 var(--radius) var(--radius) !important;
  }

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

  .hero {
    padding: 60px 20px 80px;
  }

  .problem {
    padding: 80px 20px;
  }

  .features {
    padding: 60px 20px 80px;
  }

  .closing {
    padding: 100px 20px;
  }
}