:root {
  --bg-base:       #080713;
  --bg-surface:    rgba(255,255,255,0.038);
  --bg-elevated:   rgba(255,255,255,0.065);
  --bg-hover:      rgba(255,255,255,0.06);

  --border:        rgba(255,255,255,0.07);
  --border-strong: rgba(255,255,255,0.13);
  --border-accent: rgba(59,130,246,0.4);

  --text-primary:  #e8eeff;
  --text-secondary:#8a94c8;
  --text-muted:    #4e5580;

  --blue:          #3b82f6;
  --blue-dim:      rgba(59,130,246,0.13);
  --blue-glow:     rgba(59,130,246,0.28);
  --green:         #10b981;
  --green-dim:     rgba(16,185,129,0.12);
  --red:           #ef4444;
  --red-dim:       rgba(239,68,68,0.12);

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.45), 0 1px 3px rgba(0,0,0,0.35);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.6), 0 2px 8px rgba(0,0,0,0.45);
}

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

html { background: var(--bg-base); }

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: -apple-system, "SF Pro Text", system-ui, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(59,130,246,0.08) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

body > * { position: relative; z-index: 1; }

/* ── HEADER ── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8,7,19,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  text-decoration: none;
}
.logo span { color: var(--blue); }

.badge {
  background: rgba(59,130,246,0.15);
  border: 1px solid rgba(59,130,246,0.3);
  color: var(--blue);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 4px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2px;
}

.lang-switch .lang-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: 6px;
  transition: color 150ms ease, background 150ms ease;
}

.lang-switch .lang-link:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.04);
}

.lang-switch .lang-link.active {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 2px 6px var(--blue-glow);
}

.header-home {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 8px;
  transition: color 150ms ease, background 150ms ease;
  display: flex;
  align-items: center;
  gap: 5px;
}
.header-home:hover { color: var(--text-primary); background: var(--bg-hover); }

/* ── PAGE WRAP ── */
.page-wrap {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

/* ── BREADCRUMB ── */
.breadcrumb {
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 150ms ease;
}
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb .sep { color: var(--text-muted); opacity: 0.5; }

/* ── HEADING ── */
h1 {
  font-size: clamp(24px, 4.5vw, 38px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
  color: var(--text-primary);
  text-wrap: balance;
}

.page-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.6;
  text-wrap: pretty;
}

/* ── MINI CHECKER ── */
.checker-mini {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.checker-mini input {
  flex: 1;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-family: "SF Mono", "Fira Code", ui-monospace, monospace;
  outline: none;
  min-width: 0;
  transition: border-color 150ms ease, background 150ms ease, box-shadow 150ms ease;
}
.checker-mini input::placeholder { color: var(--text-muted); }
.checker-mini input:focus {
  border-color: var(--border-accent);
  background: rgba(255,255,255,0.09);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

.checker-mini button {
  background: var(--blue);
  color: #fff;
  border: none;
  padding: 12px 22px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  box-shadow: 0 2px 10px var(--blue-glow);
  transition: filter 150ms ease, box-shadow 150ms ease, transform 100ms ease;
  font-family: inherit;
}
.checker-mini button:hover {
  filter: brightness(1.12);
  box-shadow: 0 4px 18px var(--blue-glow);
}
.checker-mini button:active { transform: scale(0.97); }

/* ── RESULT BOX ── */
.result-box {
  background: var(--blue-dim);
  border: 1px solid rgba(59,130,246,0.25);
  border-radius: 10px;
  padding: 14px 18px;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.55;
  animation: fadeIn 200ms ease;
}
.result-box a { color: var(--blue); font-weight: 600; }
.result-box a:hover { text-decoration: underline; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── CHAIN INFO BADGE ── */
.chain-info {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}
.chain-info .chain-icon { font-size: 18px; }
.chain-info strong { color: var(--text-primary); font-weight: 600; }

/* ── CONTENT BODY ── */
.content { margin: 36px 0; }

.content h2 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 32px 0 12px;
  color: var(--text-primary);
}
.content h2:first-child { margin-top: 0; }

.content p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  font-size: 15px;
  line-height: 1.7;
}

.content ul, .content ol {
  padding-left: 22px;
  margin-bottom: 14px;
}

.content li {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.65;
  margin-bottom: 6px;
}

.content li strong { color: var(--text-primary); }

.content a {
  color: var(--blue);
  text-decoration: none;
  font-weight: 500;
}
.content a:hover { text-decoration: underline; }

/* ── CHAIN-SPECIFIC FAQ ── */
.page-faq { margin: 40px 0; }
.page-faq h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-item:first-of-type { border-top: 1px solid var(--border); }

.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  padding: 16px 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-family: inherit;
  transition: color 150ms ease;
}
.faq-question:hover { color: var(--blue); }
.faq-chevron {
  flex-shrink: 0;
  font-size: 12px;
  color: var(--text-muted);
  transition: transform 250ms cubic-bezier(0.16,1,0.3,1), color 150ms ease;
}
.faq-item.open .faq-chevron { transform: rotate(180deg); color: var(--blue); }
.faq-answer { overflow: hidden; max-height: 0; transition: max-height 280ms cubic-bezier(0.16,1,0.3,1), opacity 200ms ease; opacity: 0; }
.faq-item.open .faq-answer { opacity: 1; max-height: 400px; }
.faq-answer-inner {
  padding-bottom: 16px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}
.faq-answer-inner a { color: var(--blue); }

/* ── RELATED CHAINS ── */
.related {
  margin: 40px 0 32px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.related h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text-secondary);
}
.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.related-links a {
  color: var(--blue);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  background: var(--blue-dim);
  border: 1px solid rgba(59,130,246,0.22);
  padding: 5px 14px;
  border-radius: 999px;
  transition: background 150ms ease, border-color 150ms ease, transform 150ms ease;
}
.related-links a:hover {
  background: rgba(59,130,246,0.22);
  border-color: rgba(59,130,246,0.4);
  transform: translateY(-1px);
}

/* ── TG CTA BLOCK ── */
.tg-block {
  background: rgba(37,99,235,0.1);
  border: 1px solid rgba(37,99,235,0.25);
  border-radius: 16px;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
  margin-top: 8px;
}
.tg-block-text { flex: 1; min-width: 200px; }
.tg-block-text strong { display: block; font-size: 15px; font-weight: 700; margin-bottom: 4px; color: var(--text-primary); }
.tg-block-text span { color: var(--text-secondary); font-size: 13px; line-height: 1.5; }
.tg-btn {
  background: var(--blue);
  color: #fff;
  text-decoration: none;
  padding: 11px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 14px;
  white-space: nowrap;
  flex-shrink: 0;
  box-shadow: 0 2px 10px var(--blue-glow);
  transition: filter 150ms ease, box-shadow 150ms ease, transform 100ms ease;
}
.tg-btn:hover {
  filter: brightness(1.12);
  box-shadow: 0 4px 18px var(--blue-glow);
}
.tg-btn:active { transform: scale(0.97); }

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  color: var(--text-muted);
  font-size: 13px;
}
.footer-inner {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
footer a { color: var(--blue); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ── RESPONSIVE ── */
@media (max-width: 600px) {
  header { padding: 0 16px; height: 52px; }
  .header-left { gap: 8px; }
  .logo { font-size: 15px; }
  .header-home { display: none; } /* убираем nav на мобильном */
  .page-wrap { padding: 28px 16px 56px; }
  h1 { font-size: clamp(22px, 6vw, 30px); }
  .page-subtitle { font-size: 14px; }
  .checker-mini { flex-direction: column; }
  .checker-mini input { font-size: 16px; } /* iOS no-zoom */
  .checker-mini button { width: 100%; padding: 14px; justify-content: center; }
  .chain-info { font-size: 12px; padding: 6px 10px; }
  .tg-block { flex-direction: column; align-items: flex-start; gap: 14px; padding: 16px; }
  .tg-btn { width: 100%; text-align: center; display: block; }
  .related-links { gap: 6px; }
  .related-links a { padding: 4px 10px; font-size: 12px; }
  .content h2 { font-size: 17px; }
  .breadcrumb { font-size: 12px; margin-bottom: 18px; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 8px; }
}