:root {
  --bg: #0a0b0d;
  --bg-elevated: #12131a;
  --bg-card: #161822;
  --fg: #e8e9ed;
  --fg-muted: #8b8d9a;
  --fg-dim: #5a5c6a;
  --accent: #00d4aa;
  --accent-glow: rgba(0, 212, 170, 0.15);
  --accent-subtle: rgba(0, 212, 170, 0.08);
  --border: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(0, 212, 170, 0.2);
  --red: #ff6b6b;
  --green: #00d4aa;
  --radius: 12px;
  --radius-sm: 8px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

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

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

/* ---- NAV ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  background: rgba(10, 11, 13, 0.8);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-mark {
  font-size: 1.4rem;
  color: var(--accent);
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.nav-cta {
  display: inline-block;
  padding: 8px 18px;
  background: var(--accent);
  color: #04120e;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: opacity 0.15s;
}

.nav-cta:hover { opacity: 0.85; }

/* ---- HERO ---- */
.hero {
  padding: 160px 32px 80px;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--accent-subtle);
  border: 1px solid var(--border-accent);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.035em;
  margin-bottom: 24px;
}

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

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 480px;
}

/* Hero visual card */
.hero-visual {
  display: flex;
  justify-content: flex-end;
}

.hero-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 380px;
  box-shadow: 0 0 60px var(--accent-glow), 0 20px 60px rgba(0,0,0,0.4);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.card-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
}

.card-status {
  font-size: 0.8rem;
  color: var(--accent);
}

.card-balance {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.card-meta {
  display: flex;
  gap: 32px;
}

.card-meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.meta-label {
  font-size: 0.75rem;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.meta-value {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
}

.meta-value.positive {
  color: var(--green);
}

/* ---- FEATURES ---- */
.features {
  padding: 100px 32px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  transition: border-color 0.3s;
}

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

.feature-card-large {
  grid-column: span 2;
  background: linear-gradient(135deg, var(--bg-elevated), rgba(0, 212, 170, 0.04));
  border-color: var(--border-accent);
}

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

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

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

/* ---- HOW / GAP ---- */
.how {
  padding: 100px 32px;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.how-left h2 {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 24px;
}

.how-left p {
  color: var(--fg-muted);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.comparison-block {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.comparison-item {
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.comparison-item.old {
  background: var(--bg-elevated);
  opacity: 0.6;
}

.comparison-item.new {
  background: linear-gradient(135deg, var(--bg-card), rgba(0, 212, 170, 0.06));
  border-color: var(--border-accent);
}

.comparison-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-dim);
  display: block;
  margin-bottom: 16px;
}

.comparison-item.new .comparison-label {
  color: var(--accent);
}

.comparison-item ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.comparison-item li {
  font-size: 0.9rem;
  color: var(--fg-muted);
  padding-left: 18px;
  position: relative;
}

.comparison-item.old li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--fg-dim);
}

.comparison-item.new li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ---- CLOSING ---- */
.closing {
  padding: 120px 32px;
  text-align: center;
  background: linear-gradient(180deg, var(--bg) 0%, rgba(0, 212, 170, 0.03) 50%, var(--bg) 100%);
}

.closing-inner {
  max-width: 700px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.12;
  margin-bottom: 16px;
}

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

/* ---- FOOTER ---- */
.footer {
  padding: 40px 32px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-meta {
  font-size: 0.85rem;
  color: var(--fg-dim);
  display: flex;
  gap: 8px;
  align-items: center;
}

.footer-dot {
  color: var(--fg-dim);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 120px 20px 60px;
    gap: 40px;
  }

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

  .hero-visual {
    justify-content: center;
  }

  .hero-card {
    width: 100%;
    max-width: 380px;
  }

  .features {
    padding: 60px 20px;
  }

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

  .feature-card-large {
    grid-column: span 1;
  }

  .how {
    grid-template-columns: 1fr;
    padding: 60px 20px;
    gap: 40px;
  }

  .how-left h2 {
    font-size: 1.8rem;
  }

  .closing {
    padding: 80px 20px;
  }

  .closing h2 {
    font-size: 2rem;
  }

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

  .nav-inner {
    padding: 14px 20px;
  }
}