:root {
  --bg-dark: #0a0e1a;
  --bg-card: #111827;
  --bg-card-alt: #0d2818;
  --fg: #e8eaf0;
  --fg-muted: #8b92a8;
  --accent: #4ade80;
  --accent-dim: rgba(74, 222, 128, 0.15);
  --accent-glow: rgba(74, 222, 128, 0.3);
  --red-muted: #f87171;
  --red-dim: rgba(248, 113, 113, 0.12);
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --max-w: 1100px;
}

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

body {
  background: var(--bg-dark);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

/* === HERO === */
.hero {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 80px 40px 60px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  background: var(--accent-dim);
  color: var(--accent);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid var(--accent-glow);
  margin-bottom: 32px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 5.2rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
}

.lede {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 620px;
  line-height: 1.7;
  margin-bottom: 48px;
}

.hero-stat-row {
  display: flex;
  align-items: center;
  gap: 32px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 0.82rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.1);
}

/* === PROBLEM === */
.problem {
  background: linear-gradient(180deg, var(--bg-dark) 0%, #0d1020 100%);
  padding: 100px 40px;
}

.problem-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 40px;
}

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

.problem-card {
  padding: 40px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.06);
}

.problem-card.old {
  background: var(--red-dim);
  border-color: rgba(248, 113, 113, 0.15);
}

.problem-card.new {
  background: var(--accent-dim);
  border-color: var(--accent-glow);
}

.card-tag {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 16px;
  color: var(--fg-muted);
}

.problem-card.old .card-tag { color: var(--red-muted); }
.problem-card.new .card-tag { color: var(--accent); }

.problem-card p {
  font-size: 1.05rem;
  color: var(--fg);
  margin-bottom: 24px;
  line-height: 1.7;
}

.card-verdict {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
}

.problem-card.old .card-verdict { color: var(--red-muted); }
.problem-card.new .card-verdict { color: var(--accent); }

/* === FEATURES === */
.features {
  padding: 100px 40px;
  max-width: var(--max-w);
  margin: 0 auto;
}

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

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 40px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.feature-item:first-child {
  border-top: 1px solid rgba(255,255,255,0.06);
}

.feature-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: rgba(74, 222, 128, 0.2);
  line-height: 1;
  min-width: 80px;
}

.feature-content h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--fg);
}

.feature-content p {
  color: var(--fg-muted);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 560px;
}

/* === HOW === */
.how {
  background: var(--bg-card);
  padding: 100px 40px;
}

.how .section-label {
  text-align: center;
}

.how-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 20px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.step {
  flex: 1;
  max-width: 280px;
  text-align: center;
}

.step-icon {
  font-size: 2.4rem;
  margin-bottom: 16px;
}

.step-text h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

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

.step-arrow {
  font-size: 1.8rem;
  color: var(--accent);
  margin-top: 24px;
  opacity: 0.6;
}

/* === CLOSING === */
.closing {
  padding: 120px 40px;
  text-align: center;
}

.closing-inner {
  max-width: 800px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

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

/* === PRICING PAGE === */
.pricing-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 40px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  max-width: var(--max-w);
  margin: 0 auto;
}

.pricing-nav .nav-brand {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
}

.pricing-nav .nav-try {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.pricing-hero {
  padding: 80px 40px 60px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.pricing-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

/* Plans grid */
.plans-section {
  padding: 0 40px 80px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.plan-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.plan-card-student {
  border-color: var(--accent-glow);
  background: linear-gradient(160deg, var(--bg-card) 60%, rgba(74,222,128,0.04) 100%);
}

.plan-card-pro {
  border-color: rgba(255,255,255,0.14);
}

.plan-badge-popular {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #0a0e1a;
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 5px 16px;
  border-radius: 100px;
  white-space: nowrap;
}

.plan-tier {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--fg-muted);
}

.plan-card-student .plan-tier { color: var(--accent); }

.plan-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-amount {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: var(--fg);
  line-height: 1;
}

.price-per {
  font-size: 0.95rem;
  color: var(--fg-muted);
}

.plan-desc {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.6;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.plan-features li {
  font-size: 0.95rem;
  color: var(--fg);
}

.plan-features .feat-muted {
  color: var(--fg-muted);
  opacity: 0.5;
}

.btn-plan {
  display: block;
  width: 100%;
  padding: 14px;
  border-radius: 12px;
  text-align: center;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  transition: opacity 0.15s;
  margin-top: 8px;
}

.btn-plan:hover { opacity: 0.85; }

.btn-plan-outline {
  background: transparent;
  color: var(--fg);
  border: 1px solid rgba(255,255,255,0.15);
}

.btn-plan-primary {
  background: var(--accent);
  color: #0a0e1a;
  border: none;
}

.btn-plan-pro {
  background: rgba(255,255,255,0.1);
  color: var(--fg);
  border: 1px solid rgba(255,255,255,0.15);
}

.plans-trust {
  text-align: center;
  font-size: 0.85rem;
  color: var(--fg-muted);
}

/* FAQ */
.pricing-faq {
  background: var(--bg-card);
  padding: 80px 40px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.faq-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 48px;
}

.faq-item h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.faq-item p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* Mobile pricing */
@media (max-width: 900px) {
  .plans-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
  }

  .plans-section { padding: 0 24px 60px; }
  .pricing-hero { padding: 60px 24px 40px; }
  .pricing-nav { padding: 20px 24px; }
  .faq-grid { grid-template-columns: 1fr; gap: 28px; }
  .pricing-faq { padding: 60px 24px; }
}

/* === FOOTER === */
.site-footer {
  padding: 40px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  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);
}

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

/* === MOBILE === */
@media (max-width: 768px) {
  .hero {
    padding: 60px 24px 40px;
    min-height: 80vh;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

  .hero-stat-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .stat-divider { display: none; }

  .problem { padding: 60px 24px; }

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

  .features { padding: 60px 24px; }

  .feature-item {
    flex-direction: column;
    gap: 12px;
    padding: 28px 0;
  }

  .feature-number {
    font-size: 2rem;
    min-width: auto;
  }

  .how { padding: 60px 24px; }

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

  .step-arrow {
    transform: rotate(90deg);
    margin: 8px 0;
  }

  .closing { padding: 80px 24px; }

  .footer-inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}