/* Bitcoin Ledger Recovery — multi-language landing */
:root {
  --color1: #140f0d;
  --color2: #1e2f57;
  --color3: #5961aa;
  --color4: #a69bf9;
  --color5: #ffe1f4;
  --bg-dark: #0d0a09;
  --bg-card: #1a1715;
  --text-body: #e2ddd8;
  --text-muted: #b5aea8;
  --max-width: 960px;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(22, 31, 87, 0.25);
  --transition: 0.25s ease;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-body);
  background: var(--bg-dark);
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(89, 97, 170, 0.12), transparent),
              radial-gradient(ellipse 60% 40% at 100% 50%, rgba(166, 155, 249, 0.08), transparent);
  pointer-events: none;
  z-index: 0;
}

/* Layout */
.wrapper {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.contain { max-width: var(--max-width); margin: 0 auto; }

/* Header */
.site-header {
  background: rgba(20, 15, 13, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(89, 97, 170, 0.2);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding-top: 8px;
  padding-bottom: 8px;
}
.logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color5);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.logo:hover { color: var(--color4); }
.nav-main {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-main a {
  color: #c9c3bc;
  text-decoration: none;
  font-size: 0.95rem;
  padding: 6px 10px;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}
.nav-main a:hover { color: var(--color4); background: rgba(166, 155, 249, 0.15); }
.lang-switcher {
  display: flex;
  gap: 6px;
  margin-left: 12px;
}
.lang-switcher a {
  padding: 6px 12px;
  font-size: 0.85rem;
  color: var(--color3);
  text-decoration: none;
  border-radius: 8px;
  border: 1px solid rgba(89, 97, 170, 0.4);
  transition: all var(--transition);
}
.lang-switcher a:hover,
.lang-switcher a.active { background: var(--color3); color: #fff; border-color: var(--color3); }

/* Hero / Page title block */
.hero {
  padding: 48px 0 40px;
  text-align: center;
}
.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  color: #f0ebe5;
  line-height: 1.25;
  letter-spacing: -0.02em;
}
.hero .lead {
  max-width: 640px;
  margin: 0 auto;
  color: var(--text-muted);
  font-size: 1rem;
}

/* Content blocks */
.section {
  padding: 40px 0;
}
.section:nth-child(even) .section-inner { background: #1f1b18; }
.section-inner {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid rgba(89, 97, 170, 0.25);
}
.section h2 {
  margin: 0 0 20px;
  font-size: 1.45rem;
  font-weight: 700;
  color: #e8e2dc;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color4);
}
.section h3 {
  margin: 24px 0 12px;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color4);
}
.section p {
  margin: 0 0 16px;
  color: var(--text-body);
}
.section p:last-child { margin-bottom: 0; }
.section a {
  color: var(--color3);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.section a:hover { color: var(--color4); }

/* Images */
.content-img {
  display: block;
  max-width: 100%;
  width: 420px;
  height: auto;
  border-radius: var(--radius);
  margin: 20px auto;
  box-shadow: var(--shadow);
  border: 1px solid rgba(89, 97, 170, 0.2);
}
.content-img.left { margin-left: 0; margin-right: auto; }
.content-img.right { margin-right: 0; margin-left: auto; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 20px 0; }
.section table {
  width: 100%;
  min-width: 320px;
  border-collapse: collapse;
  font-size: 0.95rem;
}
.section table th,
.section table td {
  padding: 12px 14px;
  text-align: left;
  border: 1px solid rgba(89, 97, 170, 0.35);
  color: var(--text-body);
}
.section table th {
  background: rgba(30, 47, 87, 0.5);
  color: #e0dad4;
  font-weight: 600;
}
.section table tr:nth-child(even) { background: rgba(166, 155, 249, 0.08); }

/* Lists */
.section ul {
  margin: 12px 0 20px;
  padding-left: 1.4em;
}
.section li { margin-bottom: 6px; }

/* FAQ */
.faq-block { padding: 40px 0; }
.faq-block h2 { margin-bottom: 24px; }
.faq-item {
  border: 1px solid rgba(89, 97, 170, 0.3);
  border-radius: var(--radius);
  margin-bottom: 10px;
  overflow: hidden;
  background: var(--bg-card);
}
.faq-item summary {
  padding: 18px 20px;
  font-weight: 600;
  color: #e4dfd9;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--color3);
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-answer {
  padding: 0 20px 18px;
  color: var(--text-body);
  border-top: 1px solid rgba(89, 97, 170, 0.2);
  padding-top: 14px;
  margin-top: -1px;
}

/* CTA / Links block */
.links-block {
  padding: 28px 0;
  text-align: center;
  background: rgba(166, 155, 249, 0.08);
  border-radius: var(--radius-lg);
  margin: 32px 0;
}
.links-block a {
  display: inline-block;
  margin: 4px 8px;
  padding: 10px 18px;
  background: var(--color3);
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 500;
  transition: background var(--transition);
}
.links-block a:hover { background: var(--color2); }

/* Footer */
.site-footer {
  margin-top: 56px;
  padding: 40px 0 28px;
  background: var(--color2);
  color: rgba(255,255,255,0.85);
}
.site-footer .wrapper { display: flex; flex-wrap: wrap; gap: 32px; justify-content: space-between; align-items: flex-start; }
.footer-nav h4 {
  margin: 0 0 12px;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color5);
}
.footer-nav ul { list-style: none; margin: 0; padding: 0; }
.footer-nav li { margin-bottom: 8px; }
.footer-nav a {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  font-size: 0.95rem;
}
.footer-nav a:hover { color: var(--color5); }
.footer-lang a {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  margin-right: 12px;
  font-size: 0.9rem;
}
.footer-lang a:hover { color: var(--color5); }
.footer-bottom {
  width: 100%;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.15);
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}

/* Mobile */
@media (max-width: 768px) {
  .site-header .wrapper { flex-direction: column; align-items: stretch; gap: 12px; }
  .nav-main { justify-content: center; }
  .lang-switcher { margin-left: 0; justify-content: center; }
  .hero { padding: 32px 0 28px; }
  .section-inner { padding: 24px 18px; }
  .content-img { width: 100%; max-width: 360px; }
  .site-footer .wrapper { flex-direction: column; text-align: center; }
  .footer-lang a { margin: 0 6px; }
}

@media (max-width: 480px) {
  body { font-size: 15px; }
  .nav-main { flex-direction: column; }
}