:root {
  --bg: #0a0a0a;
  --bg-elevated: #141414;
  --bg-card: #1a1a1a;
  --fg: #f0f0f0;
  --fg-muted: #8a8a8a;
  --fg-dim: #5a5a5a;
  --accent: #25D366;
  --accent-dim: #1a9e4a;
  --accent-glow: rgba(37, 211, 102, 0.15);
  --accent-subtle: rgba(37, 211, 102, 0.08);
  --border: #2a2a2a;
  --radius: 12px;
  --radius-sm: 8px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

/* ===== HERO ===== */
.hero {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px 24px 60px;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  background: var(--accent-subtle);
  border: 1px solid rgba(37, 211, 102, 0.25);
  color: var(--accent);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 16px;
  border-radius: 100px;
  margin-bottom: 32px;
  width: fit-content;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  color: var(--fg);
  margin-bottom: 24px;
}

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

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 640px;
  margin-bottom: 48px;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.stat-num {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--fg);
}

.stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--fg-dim);
  margin-top: 4px;
}

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

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

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

.problem h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  margin-bottom: 48px;
  color: var(--fg);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.problem-icon {
  font-size: 1.8rem;
  margin-bottom: 12px;
}

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

.problem-punchline {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--accent);
  max-width: 700px;
  line-height: 1.6;
}

/* ===== FEATURES ===== */
.features {
  padding: 100px 24px;
  max-width: 900px;
  margin: 0 auto;
}

.features-header {
  margin-bottom: 64px;
}

.features-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 12px;
}

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

.features-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.feature-row {
  display: flex;
  gap: 32px;
  padding: 36px 0;
  border-top: 1px solid var(--border);
  align-items: flex-start;
}

.feature-row:last-child {
  border-bottom: 1px solid var(--border);
}

.feature-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  min-width: 40px;
  padding-top: 4px;
}

.feature-content h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
  color: var(--fg);
}

.feature-content p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

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

.how h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  text-align: center;
  margin-bottom: 56px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.compare-col {
  border-radius: var(--radius);
  padding: 36px 32px;
}

.compare-old {
  background: var(--bg-card);
  border: 1px solid var(--border);
}

.compare-new {
  background: var(--accent-glow);
  border: 1px solid rgba(37, 211, 102, 0.3);
}

.compare-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 24px;
}

.compare-old .compare-label {
  color: var(--fg-dim);
}

.compare-new .compare-label {
  color: var(--accent);
}

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

.compare-col li {
  font-size: 0.95rem;
  line-height: 1.5;
  padding-left: 20px;
  position: relative;
}

.compare-old li {
  color: var(--fg-dim);
}

.compare-old li::before {
  content: '\2013';
  position: absolute;
  left: 0;
  color: var(--fg-dim);
}

.compare-new li {
  color: var(--fg);
}

.compare-new li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ===== CLOSING ===== */
.closing {
  padding: 120px 24px;
  text-align: center;
}

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

.closing h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 20px;
  line-height: 1.2;
}

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

/* ===== FOOTER ===== */
.site-footer {
  padding: 40px 24px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
}

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

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

  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  .stat-divider {
    display: none;
  }

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

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

  .feature-row {
    flex-direction: column;
    gap: 12px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

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