:root {
  --bg: #0a0a0f;
  --bg-elevated: #12121a;
  --bg-card: #1a1a25;
  --fg: #e8e8ed;
  --fg-muted: #8a8a9a;
  --accent: #6cf5a5;
  --accent-dim: rgba(108, 245, 165, 0.12);
  --accent-glow: rgba(108, 245, 165, 0.25);
  --danger: #f56c6c;
  --border: rgba(255, 255, 255, 0.06);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --max-width: 1100px;
}

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

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

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

/* ========= HERO ========= */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px 60px;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, var(--accent-dim) 0%, transparent 70%),
    var(--bg);
  position: relative;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.hero-inner {
  max-width: var(--max-width);
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(108, 245, 165, 0.15);
  padding: 6px 18px;
  border-radius: 100px;
  margin-bottom: 32px;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 700;
  margin-bottom: 24px;
  color: #fff;
}

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

.lede {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--fg-muted);
  max-width: 640px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

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

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

.problem h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: #fff;
  margin-bottom: 56px;
  text-align: center;
}

.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: 16px;
  padding: 36px 28px;
  transition: border-color 0.3s;
}

.problem-card:hover {
  border-color: rgba(108, 245, 165, 0.2);
}

.problem-icon {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--danger);
  margin-bottom: 16px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(245, 108, 108, 0.1);
  border-radius: 12px;
}

.problem-card h3 {
  font-size: 1.15rem;
  color: #fff;
  margin-bottom: 10px;
}

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

/* ========= FEATURES ========= */
.features {
  padding: 100px 24px;
  background: var(--bg-elevated);
  position: relative;
}

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

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

.features-header {
  margin-bottom: 64px;
}

.features-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: #fff;
  margin-bottom: 12px;
}

.features-sub {
  font-size: 1.1rem;
  color: var(--fg-muted);
}

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

.feature-row {
  display: flex;
  align-items: baseline;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}

.feature-row:last-child {
  border-bottom: none;
}

.feature-number {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  min-width: 40px;
  letter-spacing: 0.05em;
}

.feature-content h3 {
  font-size: 1.3rem;
  color: #fff;
  margin-bottom: 8px;
}

.feature-content p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.6;
  max-width: 600px;
}

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

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

.how h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: #fff;
  margin-bottom: 48px;
  text-align: center;
}

.how-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 760px;
  margin: 0 auto;
}

.how-col {
  border-radius: 16px;
  padding: 36px 28px;
}

.how-old {
  background: var(--bg-card);
  border: 1px solid var(--border);
}

.how-new {
  background: var(--accent-dim);
  border: 1px solid rgba(108, 245, 165, 0.2);
}

.how-col-label {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 20px;
}

.how-old .how-col-label {
  color: var(--fg-muted);
}

.how-new .how-col-label {
  color: var(--accent);
}

.how-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.how-col li {
  font-size: 0.95rem;
  line-height: 1.5;
  padding-left: 20px;
  position: relative;
}

.how-old li {
  color: var(--fg-muted);
}

.how-old li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--fg-muted);
  opacity: 0.4;
}

.how-new li {
  color: var(--fg);
}

.how-new li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ========= CLOSING ========= */
.closing {
  padding: 120px 24px;
  background:
    radial-gradient(ellipse 80% 60% at 50% 100%, var(--accent-dim) 0%, transparent 70%),
    var(--bg-elevated);
  text-align: center;
  position: relative;
}

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

.closing-inner {
  max-width: 680px;
  margin: 0 auto;
}

.closing h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: #fff;
  margin-bottom: 20px;
}

.closing p {
  font-size: 1.1rem;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.closing-tagline {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent) !important;
  font-style: italic;
}

/* ========= FOOTER ========= */
.site-footer {
  padding: 32px 24px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: var(--max-width);
  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: #fff;
}

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

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

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

  .hero-stats {
    gap: 20px;
  }

  .stat-divider {
    display: none;
  }

  .hero-stats {
    justify-content: space-around;
  }

  .feature-row {
    flex-direction: column;
    gap: 8px;
  }

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

@media (max-width: 480px) {
  .hero {
    padding: 60px 16px 40px;
    min-height: 80vh;
  }

  .problem, .features, .how {
    padding: 64px 16px;
  }

  .closing {
    padding: 80px 16px;
  }
}