:root {
  --bg: #0a0e17;
  --bg-surface: #111827;
  --bg-card: #151d2e;
  --fg: #e8edf5;
  --fg-muted: #8b95a8;
  --fg-dim: #5a6477;
  --accent: #22c55e;
  --accent-glow: rgba(34, 197, 94, 0.15);
  --accent-border: rgba(34, 197, 94, 0.25);
  --border: rgba(255, 255, 255, 0.06);
  --radius: 12px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

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

/* === HERO === */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  text-align: center;
  overflow: hidden;
}

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

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--accent-glow);
  border: 1px solid var(--accent-border);
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 32px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6.5vw, 5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #ffffff 0%, #c0c8d8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

.hero-glow {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(34, 197, 94, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
}

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

.problem-inner {
  max-width: 960px;
  margin: 0 auto;
}

.problem-label,
.features-label,
.how-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 16px;
  text-transform: uppercase;
}

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

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

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color 0.2s;
}

.problem-card:hover {
  border-color: var(--accent-border);
}

.problem-num {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--fg-dim);
  margin-bottom: 16px;
}

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--fg);
}

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

/* === FEATURES === */
.features {
  padding: 100px 24px;
}

.features-inner {
  max-width: 960px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 26px;
  transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-2px);
}

.feature-highlight {
  border-color: var(--accent-border);
  background: linear-gradient(135deg, var(--bg-surface) 0%, rgba(34, 197, 94, 0.04) 100%);
}

.feature-icon {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 16px;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 10px;
}

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

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

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

.how-steps {
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

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

.step-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent-glow);
  border: 1px solid var(--accent-border);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.step-content p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

.step-line {
  width: 2px;
  height: 40px;
  background: var(--border);
  margin-left: 23px;
}

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

.closing-inner {
  position: relative;
  z-index: 2;
  max-width: 680px;
  margin: 0 auto;
}

.closing-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(34, 197, 94, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #ffffff 0%, #c0c8d8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

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

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--fg);
}

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

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .problem-grid {
    grid-template-columns: 1fr;
  }

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

  .hero {
    min-height: 70vh;
    padding: 100px 20px 60px;
  }

  .problem,
  .features,
  .how,
  .closing {
    padding: 72px 20px;
  }

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

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2.4rem;
  }

  .problem h2,
  .features h2,
  .how h2 {
    font-size: 1.6rem;
  }
}