:root {
  --bg: #06080d;
  --bg-elevated: #0c1018;
  --bg-card: #111827;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #3b82f6;
  --accent-2: #06b6d4;
  --accent-glow: rgba(59, 130, 246, 0.35);
  --success: #22c55e;
  --gradient: linear-gradient(135deg, #3b82f6 0%, #06b6d4 50%, #8b5cf6 100%);
  --radius: 16px;
  --font: "Inter", system-ui, -apple-system, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

.container {
  width: min(1140px, 92vw);
  margin: 0 auto;
}

/* ── Nav ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  background: rgba(6, 8, 13, 0.75);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gradient);
  display: grid;
  place-items: center;
  font-size: 1rem;
  box-shadow: 0 0 24px var(--accent-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.92rem;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--text); }

.nav-actions { display: flex; gap: 12px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.92rem;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn:hover { transform: translateY(-1px); }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-primary {
  background: var(--gradient);
  color: white;
  box-shadow: 0 4px 24px var(--accent-glow);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
  border-radius: 12px;
}

/* ── Hero ── */
.hero {
  padding: 140px 0 80px;
  position: relative;
}

.hero-glow {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 500px;
  background: radial-gradient(ellipse, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: #93c5fd;
  font-size: 0.82rem;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p.lead {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 480px;
  margin-bottom: 32px;
}

.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
}

.stat strong {
  display: block;
  font-size: 1.5rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat span { color: var(--muted); font-size: 0.85rem; }

.hero-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.4);
}

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

.hero-card-header h3 { font-size: 0.95rem; color: var(--muted); }

.status-pill {
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
  font-size: 0.75rem;
  font-weight: 600;
}

.payment-preview {
  background: var(--bg);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
}

.payment-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--border);
}

.payment-row:last-child { border: none; }

.payment-row .label { color: var(--muted); }

.mono {
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.82rem;
}

/* ── Sections ── */
section { padding: 80px 0; }

.section-label {
  color: var(--accent-2);
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--muted);
  max-width: 560px;
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-2px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(59, 130, 246, 0.12);
  display: grid;
  place-items: center;
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--muted);
  font-size: 0.9rem;
}

/* ── How it works ── */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.step {
  text-align: center;
  padding: 24px 16px;
}

.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient);
  display: grid;
  place-items: center;
  font-weight: 700;
  margin: 0 auto 16px;
}

.step h4 { margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 0.88rem; }

/* ── API ── */
.api-section {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.code-block {
  background: #0a0f16;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--muted);
}

.code-block pre {
  padding: 20px;
  overflow-x: auto;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.82rem;
  line-height: 1.7;
  color: #cbd5e1;
}

.code-block .kw { color: #c084fc; }
.code-block .str { color: #86efac; }
.code-block .key { color: #67e8f9; }

/* ── Coins ── */
.coins-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.coin-badge {
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: 0.88rem;
  font-weight: 500;
}

/* ── CTA ── */
.cta-box {
  text-align: center;
  padding: 64px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 24px;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(59, 130, 246, 0.12), transparent 60%);
}

.cta-box > * { position: relative; }

.cta-box h2 { font-size: 2rem; margin-bottom: 12px; }
.cta-box p { color: var(--muted); margin-bottom: 28px; }

/* ── Footer ── */
.footer {
  padding: 48px 0 32px;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer h4 { margin-bottom: 12px; font-size: 0.9rem; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 8px; }
.footer a { color: var(--muted); font-size: 0.88rem; }
.footer a:hover { color: var(--text); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.82rem;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
}

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.04);
}

.lang-switch button {
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 10px;
  cursor: pointer;
}

.lang-switch button.active {
  background: rgba(59, 130, 246, 0.2);
  color: var(--text);
}

.lang-switch button:hover:not(.active) {
  color: var(--text);
}