:root {
  --bg: #0a0a0f;
  --bg-elevated: #12121a;
  --bg-card: #1a1a26;
  --fg: #e8e6f0;
  --fg-muted: #8a879c;
  --fg-dim: #5a5770;
  --accent: #6ee7a0;
  --accent-glow: rgba(110, 231, 160, 0.15);
  --accent-dim: #3a9965;
  --red: #ff6b6b;
  --red-dim: rgba(255, 107, 107, 0.1);
  --border: #2a2a3a;
  --radius: 12px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ─── HERO ─── */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px 60px;
  overflow: hidden;
}

.hero-inner {
  max-width: 720px;
  text-align: center;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent-dim);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 32px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: #fff;
  margin-bottom: 28px;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 540px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--fg-dim);
  max-width: 180px;
  text-align: center;
  line-height: 1.4;
}

.stat-divider {
  width: 1px;
  height: 48px;
  background: var(--border);
}

.hero-glow {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(110, 231, 160, 0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
}

/* ─── PROBLEM ─── */
.problem {
  padding: 100px 24px;
  background: var(--bg);
}

.problem-inner {
  max-width: 900px;
  margin: 0 auto;
}

.problem h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 16px;
}

.problem-text {
  font-size: 1.1rem;
  color: var(--fg-muted);
  max-width: 640px;
  margin-bottom: 48px;
  line-height: 1.75;
}

.problem-text em {
  color: var(--accent);
  font-style: normal;
  font-weight: 500;
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.problem-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.problem-card.old {
  opacity: 0.7;
}

.problem-card.new {
  border-color: var(--accent-dim);
  background: linear-gradient(135deg, var(--bg-elevated), rgba(110, 231, 160, 0.03));
}

.card-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

.problem-card.old .card-label { color: var(--fg-dim); }
.problem-card.new .card-label { color: var(--accent); }

.problem-card ul {
  list-style: none;
  margin-bottom: 24px;
}

.problem-card ul li {
  font-size: 0.95rem;
  color: var(--fg-muted);
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.problem-card.old ul li::before {
  content: '✕ ';
  color: var(--red);
  font-size: 0.8rem;
}

.problem-card.new ul li::before {
  content: '→ ';
  color: var(--accent);
}

.card-cost {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
}

.problem-card.old .card-cost { color: var(--red); }
.problem-card.new .card-cost { color: var(--accent); }

/* ─── HOW ─── */
.how {
  padding: 100px 24px;
  background: var(--bg-elevated);
}

.how-inner {
  max-width: 720px;
  margin: 0 auto;
}

.how h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 12px;
}

.how-sub {
  font-size: 1.05rem;
  color: var(--fg-muted);
  max-width: 560px;
  margin-bottom: 56px;
  line-height: 1.7;
}

.how-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  padding-left: 40px;
}

.how-timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent-dim), transparent);
}

.how-step {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 24px 0;
  position: relative;
}

.step-marker {
  position: absolute;
  left: -40px;
  width: 32px;
  height: 32px;
  background: var(--bg);
  border: 2px solid var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--accent);
  z-index: 2;
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 6px;
}

.step-content p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* ─── FEATURES ─── */
.features {
  padding: 100px 24px;
  background: var(--bg);
}

.features-inner {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.feature-block {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: border-color 0.2s;
}

.feature-block:hover {
  border-color: var(--accent-dim);
}

.feature-icon {
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 16px;
}

.feature-block h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 10px;
}

.feature-block p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* ─── CLOSING ─── */
.closing {
  padding: 120px 24px;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-elevated) 100%);
  text-align: center;
}

.closing-inner {
  max-width: 640px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 20px;
}

.closing-text {
  font-size: 1.1rem;
  color: var(--fg-muted);
  line-height: 1.75;
  margin-bottom: 24px;
}

.closing-note {
  font-size: 0.85rem;
  color: var(--fg-dim);
  font-style: italic;
}

/* ─── FOOTER ─── */
.site-footer {
  padding: 40px 24px;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.footer-tagline {
  font-size: 0.8rem;
  color: var(--fg-dim);
}

/* ─── MOBILE ─── */
@media (max-width: 680px) {
  .problem-grid {
    grid-template-columns: 1fr;
  }
  .features-inner {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    flex-direction: column;
    gap: 20px;
  }
  .stat-divider {
    width: 48px;
    height: 1px;
  }
  .hero {
    min-height: auto;
    padding: 60px 20px 40px;
  }
  .problem,
  .how,
  .features,
  .closing {
    padding: 60px 20px;
  }
}