:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #16162280;
  --fg-primary: #e8e6e3;
  --fg-secondary: #8a8a9a;
  --fg-dim: #55556a;
  --accent: #00e5ff;
  --accent-glow: rgba(0, 229, 255, 0.15);
  --accent-alt: #ff3d71;
  --border: #1e1e2e;
  --font-body: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

/* ========== HERO ========== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 6rem 2rem 4rem;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  position: relative;
  z-index: 1;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

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

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

.hero-stats {
  display: flex;
  gap: 3rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}

.stat-num {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--accent);
  display: block;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ========== PROBLEM ========== */
.problem {
  padding: 6rem 2rem;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.problem-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.problem h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 600;
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
}

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

.problem-card {
  padding: 2rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  transition: border-color 0.3s;
}

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

.problem-icon {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 1rem;
  letter-spacing: 0.1em;
}

.problem-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

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

/* ========== FEATURES ========== */
.features {
  padding: 6rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.features-header {
  margin-bottom: 3.5rem;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  color: var(--accent);
  text-transform: uppercase;
  display: block;
  margin-bottom: 1rem;
}

.features-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

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

.feature-row {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
}

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

.feature-num {
  color: var(--accent);
  font-size: 0.7rem;
  margin-top: 0.45rem;
  flex-shrink: 0;
}

.feature-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature-content p {
  font-size: 0.95rem;
  color: var(--fg-secondary);
  line-height: 1.65;
  max-width: 600px;
}

/* ========== HOW IT WORKS ========== */
.how {
  padding: 6rem 2rem;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.how-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.how h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 600;
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
}

.how-grid {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
}

.how-step {
  flex: 1;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.step-marker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

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

.how-arrow {
  color: var(--fg-dim);
  font-size: 1.5rem;
  margin-top: 3rem;
  flex-shrink: 0;
}

/* ========== CLOSING ========== */
.closing {
  padding: 8rem 2rem;
  text-align: center;
  position: relative;
}

.closing::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(255, 61, 113, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.closing-inner {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.closing h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.closing-text {
  font-size: 1.1rem;
  color: var(--fg-secondary);
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.closing-accent {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ========== FOOTER ========== */
.site-footer {
  padding: 2.5rem 2rem;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.footer-note {
  font-size: 0.8rem;
  color: var(--fg-dim);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  .hero {
    padding: 4rem 1.5rem 3rem;
    min-height: auto;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1.5rem;
  }

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

  .how-grid {
    flex-direction: column;
  }

  .how-arrow {
    transform: rotate(90deg);
    text-align: center;
    margin: 0 auto;
  }

  .feature-row {
    flex-direction: column;
    gap: 0.75rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }

  .problem,
  .features,
  .how,
  .closing {
    padding: 4rem 1.5rem;
  }
}