:root {
  --bg-canvas: #09090b;
  --bg-surface: #121215;
  --bg-surface-hover: #18181b;
  --bg-card: #141417;
  --border-dim: #27272a;
  --border-bright: #3f3f46;
  --text-main: #f4f4f5;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;
  --accent-primary: #ffffff;
  --accent-emerald: #10b981;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Inter", sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, Menlo, monospace;
}

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

body {
  background-color: var(--bg-canvas);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Nav */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(9, 9, 11, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dim);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-main);
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  border: 1px solid var(--border-dim);
}

.brand-text {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand-tag {
  font-size: 0.65rem;
  font-family: var(--font-mono);
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg-surface);
  border: 1px solid var(--border-dim);
  color: var(--text-muted);
  vertical-align: middle;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

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

.nav-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 9999px;
  border: 1px solid var(--border-dim);
  background: var(--bg-surface);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-emerald);
}

/* Hero Section */
.hero {
  padding: 5rem 0 3.5rem;
  text-align: left;
}

.badge-pill {
  display: inline-block;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 4px 12px;
  border-radius: 9999px;
  border: 1px solid var(--border-dim);
  background: var(--bg-surface);
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--text-main);
  max-width: 800px;
  margin-bottom: 1.25rem;
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 640px;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.65rem 1.25rem;
  border-radius: 6px;
  text-decoration: none;
  transition: all 0.15s ease;
  cursor: pointer;
}

.btn-primary {
  background: var(--text-main);
  color: var(--bg-canvas);
  border: 1px solid var(--text-main);
}

.btn-primary:hover {
  background: #e4e4e7;
  border-color: #e4e4e7;
}

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

.btn-secondary:hover {
  border-color: var(--border-bright);
  background: var(--bg-surface);
}

/* Section Common */
.section {
  padding: 4rem 0;
  border-top: 1px solid var(--border-dim);
}

.section-head {
  margin-bottom: 2.5rem;
}

.section-tag {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  display: block;
  margin-bottom: 0.5rem;
}

.section-head h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.section-head p {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Grid Cards (Ecosystem) */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: 8px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease;
}

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

.card-header {
  margin-bottom: 1rem;
}

.card-badge {
  font-size: 0.65rem;
  font-family: var(--font-mono);
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-dim);
  background: var(--bg-surface);
  color: var(--text-muted);
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.card-features {
  list-style: none;
  margin-bottom: 1.5rem;
  border-top: 1px solid var(--border-dim);
  padding-top: 1rem;
}

.card-features li {
  font-size: 0.8125rem;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--text-dim);
}

.card-link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-main);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: opacity 0.15s ease;
}

.card-link:hover {
  opacity: 0.8;
}

/* Verification Section */
.verify-box {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: 8px;
  padding: 2rem;
}

.anti-fraud-alert {
  padding: 1rem 1.25rem;
  border-radius: 6px;
  border: 1px solid #7f1d1d;
  background: rgba(127, 29, 29, 0.15);
  margin-bottom: 2rem;
}

.anti-fraud-alert h4 {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fca5a5;
  margin-bottom: 0.25rem;
}

.anti-fraud-alert p {
  font-size: 0.8125rem;
  color: #fecaca;
  line-height: 1.5;
}

.payment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.pay-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-dim);
  border-radius: 6px;
  padding: 1.25rem;
}

.pay-bank {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  margin-bottom: 0.25rem;
}

.pay-holder {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.pay-holder small {
  display: block;
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-dim);
  margin-top: 0.2rem;
}

.pay-number-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  background: var(--bg-canvas);
  border: 1px solid var(--border-dim);
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
}

.pay-number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-main);
}

.copy-btn {
  background: transparent;
  border: 1px solid var(--border-dim);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.copy-btn:hover {
  background: var(--bg-surface);
  color: var(--text-main);
  border-color: var(--border-bright);
}

/* Specs / Standards Grid */
.specs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.spec-item {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: 6px;
  padding: 1.5rem;
}

.spec-item h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.spec-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-dim);
  padding: 2.5rem 0;
  background: var(--bg-canvas);
}

.footer-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-dim);
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

.footer-links a {
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .hero h1 {
    font-size: 2rem;
  }
  .verify-box {
    padding: 1.25rem;
  }
}