:root {
  --bg: #0a0a0a;
  --fg: #f0efe9;
  --fg-muted: #a09f97;
  --accent: #c8ff00;
  --accent-dim: rgba(200, 255, 0, 0.12);
  --surface: #151515;
  --surface-border: #222;
  --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);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ─── HERO ─── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px 24px 60px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-dim) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 32px;
  padding: 6px 14px;
  border: 1px solid rgba(200, 255, 0, 0.25);
  border-radius: 4px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero-sub {
  font-size: 1.2rem;
  color: var(--fg-muted);
  max-width: 560px;
  line-height: 1.7;
}

/* ─── PROBLEM SECTION ─── */
.problem {
  padding: 100px 24px;
  background: var(--surface);
  border-top: 1px solid var(--surface-border);
  border-bottom: 1px solid var(--surface-border);
}

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

.problem-label {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 24px;
}

.problem h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
  max-width: 700px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.problem-card {
  background: var(--bg);
  border: 1px solid var(--surface-border);
  border-radius: 12px;
  padding: 32px 28px;
}

.problem-card .num {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 12px;
}

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
}

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

/* ─── HOW IT WORKS ─── */
.how {
  padding: 100px 24px;
}

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

.how-label {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 24px;
}

.how h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 56px;
  max-width: 650px;
}

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

.step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  padding: 36px 0;
  border-bottom: 1px solid var(--surface-border);
}

.step:first-child {
  border-top: 1px solid var(--surface-border);
}

.step-num {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  padding-top: 2px;
}

.step h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.step p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  max-width: 520px;
}

/* ─── PROOF / NUMBERS ─── */
.proof {
  padding: 80px 24px;
  background: var(--surface);
  border-top: 1px solid var(--surface-border);
  border-bottom: 1px solid var(--surface-border);
}

.proof-inner {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  text-align: center;
}

.proof-stat .big {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
  margin-bottom: 8px;
}

.proof-stat p {
  color: var(--fg-muted);
  font-size: 0.9rem;
  max-width: 200px;
  margin: 0 auto;
}

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

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

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.closing h2 em {
  font-style: normal;
  color: var(--accent);
}

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

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

footer p {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--fg-muted);
}

footer .brand {
  color: var(--accent);
  font-weight: 600;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 640px) {
  .hero {
    padding: 60px 20px 40px;
    min-height: 90vh;
  }
  .problem, .how, .closing {
    padding: 64px 20px;
  }
  .proof {
    padding: 56px 20px;
  }
  .step {
    grid-template-columns: 40px 1fr;
    gap: 16px;
    padding: 24px 0;
  }
  .proof-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}