:root {
  --bg-primary: #0a0a0c;
  --bg-secondary: #111114;
  --bg-card: #18181c;
  --fg-primary: #f0ede6;
  --fg-secondary: #9a9590;
  --fg-muted: #5a5550;
  --accent: #c8ff00;
  --accent-dim: rgba(200, 255, 0, 0.12);
  --accent-glow: rgba(200, 255, 0, 0.06);
  --border: rgba(255, 255, 255, 0.06);
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --max-width: 1120px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 24px 80px;
  position: relative;
  background: 
    radial-gradient(ellipse 60% 50% at 20% 50%, var(--accent-glow), transparent),
    radial-gradient(ellipse 40% 60% at 80% 30%, rgba(200, 255, 0, 0.03), transparent),
    var(--bg-primary);
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 8px 16px;
  border-radius: 100px;
  margin-bottom: 32px;
  border: 1px solid rgba(200, 255, 0, 0.15);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--fg-primary);
  margin-bottom: 28px;
}

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

.hero-sub {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--fg-secondary);
  max-width: 580px;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* ===== PROBLEM ===== */
.problem {
  padding: 120px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.section-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 32px;
}

.problem-stat {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--fg-primary);
  margin-bottom: 16px;
}

.problem-stat-sub {
  font-size: 1.1rem;
  color: var(--fg-secondary);
}

.problem-card {
  padding: 28px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 16px;
}

.problem-card:last-child {
  margin-bottom: 0;
}

.problem-card-num {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.problem-card p {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--fg-secondary);
}

/* ===== HOW ===== */
.how {
  padding: 120px 0;
}

.how-intro {
  font-size: 1.2rem;
  color: var(--fg-secondary);
  max-width: 640px;
  margin-bottom: 64px;
  line-height: 1.7;
}

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

.how-step {
  padding: 36px 32px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.3s ease;
}

.how-step:hover {
  border-color: rgba(200, 255, 0, 0.2);
}

.how-step-marker {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  border-radius: 10px;
  color: var(--accent);
  margin-bottom: 20px;
}

.how-step h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--fg-primary);
  margin-bottom: 12px;
}

.how-step p {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--fg-secondary);
}

/* ===== RESULTS ===== */
.results {
  padding: 120px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.result-block {
  padding: 40px 32px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: center;
}

.result-number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.03em;
}

.result-unit {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fg-muted);
  margin-top: 8px;
  margin-bottom: 20px;
}

.result-block p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--fg-secondary);
}

/* ===== CLOSING ===== */
.closing {
  padding: 140px 0;
  background: 
    radial-gradient(ellipse 50% 50% at 50% 50%, var(--accent-glow), transparent),
    var(--bg-primary);
}

.closing-content {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--fg-primary);
  margin-bottom: 24px;
}

.closing-sub {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--fg-secondary);
}

/* ===== FOOTER ===== */
.site-footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--fg-primary);
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero {
    padding: 80px 24px 60px;
    min-height: 90vh;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

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

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

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

  .closing {
    padding: 80px 0;
  }

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

  .problem, .how, .results {
    padding: 80px 0;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .problem-stat {
    font-size: 1.6rem;
  }

  .result-number {
    font-size: 2.5rem;
  }
}