:root {
  --bg: #0a0a0f;
  --bg-surface: #12121a;
  --bg-card: #1a1a26;
  --fg: #e8e8ed;
  --fg-muted: #8888a0;
  --accent: #5ce1e6;
  --accent-glow: rgba(92, 225, 230, 0.15);
  --accent-secondary: #a78bfa;
  --border: rgba(255, 255, 255, 0.06);
  --radius: 12px;
  --space: clamp(1rem, 4vw, 2rem);
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

/* HERO */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem var(--space) 4rem;
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(92, 225, 230, 0.08) 0%, transparent 70%);
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.3;
}

.hero-inner {
  max-width: 800px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  border: 1px solid rgba(92, 225, 230, 0.25);
  padding: 0.5rem 1.2rem;
  border-radius: 100px;
  margin-bottom: 2rem;
  background: var(--accent-glow);
}

.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  margin-bottom: 1.5rem;
  color: #fff;
}

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

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 640px;
  margin: 0 auto 3rem;
  line-height: 1.7;
}

/* DEMO CARD */
.hero-demo {
  margin-top: 2rem;
}

.demo-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: left;
  max-width: 560px;
  margin: 0 auto;
}

.demo-input, .demo-output {
  padding: 1rem;
  border-radius: 8px;
}

.demo-input {
  background: var(--bg-surface);
  border: 1px solid var(--border);
}

.demo-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.demo-value {
  color: var(--fg);
  font-size: 0.95rem;
}

.demo-arrow {
  text-align: center;
  font-size: 1.4rem;
  color: var(--accent);
  padding: 0.8rem 0;
  opacity: 0.6;
}

.demo-output {
  background: linear-gradient(135deg, rgba(92, 225, 230, 0.06), rgba(167, 139, 250, 0.06));
  border: 1px solid rgba(92, 225, 230, 0.12);
}

.demo-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.demo-tag {
  background: rgba(92, 225, 230, 0.1);
  border: 1px solid rgba(92, 225, 230, 0.2);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
}

/* HOW IT WORKS */
.how-it-works {
  padding: 6rem var(--space);
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.how-it-works h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  text-align: center;
  margin-bottom: 3.5rem;
  color: #fff;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.step {
  padding: 1.5rem;
}

.step-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.25;
  line-height: 1;
  margin-bottom: 1rem;
}

.step h3 {
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 0.75rem;
}

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

/* FEATURES */
.features {
  padding: 6rem var(--space);
}

.features h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  text-align: center;
  margin-bottom: 3.5rem;
  color: #fff;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: rgba(92, 225, 230, 0.2);
}

.feature-icon {
  font-size: 1.4rem;
  color: var(--accent);
  margin-bottom: 1rem;
  display: inline-block;
  width: 40px;
  height: 40px;
  line-height: 40px;
  text-align: center;
  border-radius: 8px;
  background: var(--accent-glow);
}

.feature-card h3 {
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 0.75rem;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* PRICING */
.pricing {
  padding: 6rem var(--space);
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.pricing h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  text-align: center;
  margin-bottom: 3.5rem;
  color: #fff;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  text-align: center;
}

.price-card.featured {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(92, 225, 230, 0.06) 0%, var(--bg-card) 100%);
  position: relative;
}

.price-card.featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.price-tier {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 0.75rem;
}

.featured .price-tier {
  color: var(--accent);
}

.price-amount {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 3rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1.5rem;
}

.price-amount span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--fg-muted);
}

.price-card ul {
  list-style: none;
  text-align: left;
}

.price-card li {
  font-size: 0.9rem;
  color: var(--fg-muted);
  padding: 0.5rem 0;
  border-top: 1px solid var(--border);
}

.price-card li:last-child {
  border-bottom: 1px solid var(--border);
}

/* CLOSING */
.closing {
  padding: 8rem var(--space);
  text-align: center;
  background: radial-gradient(ellipse 60% 50% at 50% 100%, rgba(167, 139, 250, 0.06) 0%, transparent 70%);
}

.closing h2 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  color: #fff;
  max-width: 700px;
  margin: 0 auto 1.5rem;
}

.closing-sub {
  font-size: 1.05rem;
  color: var(--fg-muted);
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.7;
}

/* FOOTER */
.site-footer {
  padding: 3rem var(--space);
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
  margin-bottom: 0.5rem;
}

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

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

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

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  .hero {
    min-height: auto;
    padding: 4rem var(--space) 3rem;
  }

  .demo-card {
    padding: 1.2rem;
  }

  .demo-input, .demo-output {
    padding: 0.8rem;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

  .hero-badge {
    font-size: 0.7rem;
    padding: 0.4rem 1rem;
  }
}