:root {
  --bg: #0a0d0c;
  --bg-alt: #101a15;
  --card-bg: #131a17;
  --border: #24322c;
  --fg: #e8f5ee;
  --muted: #9db3a8;
  --accent: #2fbf6f;
  --accent-strong: #1f9d5a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.55;
}

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

.cross-banner {
  display: block;
  text-align: center;
  background: var(--accent);
  color: #06130c;
  font-weight: 700;
  font-size: 0.78rem;
  padding: 0.4rem 1rem;
  text-decoration: none;
}

.cross-banner:hover { background: var(--accent-strong); }

.cross-banner strong { text-decoration: underline; }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem;
  padding: 1.1rem 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--fg);
  font-weight: 700;
  font-size: 1.15rem;
}

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  font-size: 0.92rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

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

.nav-cta {
  background: var(--card-bg);
  border: 1px solid var(--border);
  padding: 0.4rem 0.9rem;
  border-radius: 8px;
  color: var(--fg) !important;
}

.lang-switch {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.25rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--muted) !important;
}

.lang-switch:hover {
  border-color: var(--accent);
  color: var(--accent) !important;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero {
  text-align: center;
  padding: 4rem 1rem 3rem;
  max-width: 780px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.3rem;
  line-height: 1.25;
  margin: 0 0 1.1rem;
}

.hero-sub {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 2rem;
}

.hero-cta {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

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

.btn {
  display: inline-block;
  padding: 0.75rem 1.4rem;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--accent);
  color: #06130c;
}

.btn-primary:hover { background: var(--accent-strong); }

.btn-secondary {
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--fg);
}

.btn-large {
  padding: 0.9rem 2rem;
  font-size: 1.05rem;
}

section {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
}

section h2 {
  font-size: 1.5rem;
  margin-bottom: 1.2rem;
  text-align: center;
}

.why p {
  max-width: 700px;
  margin: 0 auto 1rem;
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.3rem;
}

.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  color: var(--accent);
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.security-list {
  max-width: 700px;
  margin: 0 auto;
  color: var(--muted);
  padding-left: 1.2rem;
}

.security-list li {
  margin-bottom: 0.6rem;
}

.security-list code {
  background: var(--card-bg);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.hash-verify {
  max-width: 700px;
  margin: 1.4rem auto 0;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem 1.4rem;
}

.hash-verify-label {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0 0 0.6rem;
}

.hash-value {
  display: block;
  word-break: break-all;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.8rem;
  color: var(--accent);
}

.hash-verify .price-note {
  text-align: left;
  margin: 0.7rem 0 0;
}

.pricing {
  text-align: center;
}

.price-card {
  max-width: 380px;
  margin: 0 auto;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.2rem 1.5rem;
}

.price {
  font-size: 2.6rem;
  font-weight: 800;
  margin: 0;
  color: var(--accent);
}

.price-sub {
  color: var(--muted);
  font-size: 0.88rem;
  margin: 0.3rem 0 1.4rem;
}

.price-note {
  color: var(--muted);
  font-size: 0.82rem;
  margin-top: 0.9rem;
}

.btc-pay {
  margin-top: 1.4rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border);
}

.btc-pay-label {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0 0 0.5rem;
}

.btc-buttons {
  display: flex;
  gap: 0.7rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 0.9rem;
}

.lightning-copy {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.lightning-copy code {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.7rem;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.82rem;
  color: var(--accent);
  word-break: break-all;
}

.copy-btn {
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--fg);
  border-radius: 8px;
  padding: 0.5rem 0.9rem;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}

.copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

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

.faq details {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.8rem 1rem;
  margin-bottom: 0.7rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
}

.faq p {
  color: var(--muted);
  margin: 0.6rem 0 0.2rem;
  font-size: 0.92rem;
}

.site-footer {
  text-align: center;
  padding: 2.5rem 1rem 3rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

.site-footer p { margin: 0.2rem 0; }

.powered-badge {
  display: inline-block;
  margin-top: 0.9rem;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.78rem;
}

.powered-badge:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.mobile-warning {
  display: none;
}

@media (max-width: 640px) {
  .nav { justify-content: center; text-align: center; }
  .nav-links { gap: 0.7rem; font-size: 0.82rem; justify-content: center; flex-wrap: wrap; }
  .hero h1 { font-size: 1.7rem; }

  .mobile-warning {
    display: block;
    background: #3a2a0a;
    border: 1px solid #c8912f;
    color: #ffcb66;
    border-radius: 8px;
    padding: 0.7rem 0.9rem;
    font-size: 0.85rem;
    font-weight: 600;
    text-align: left;
    margin: 1rem 0 0;
  }
}