:root {
  --bg-main: #0d1117;
  --bg-secondary: #161b22;
  --panel-bg: #1c2128;
  --border: #30363d;
  --text: #c9d1d9;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --success: #3fb950;
  --warning: #d29922;
  --error: #f85149;
  --mono: 'JetBrains Mono', monospace;
  --sans: 'Inter', sans-serif;
}

body {
  background: var(--bg-main);
  color: var(--text);
  margin: 0;
  font-family: var(--sans);
}
h1, h2, h3 { font-family: var(--mono); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.hud-header {
  background: var(--bg-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.onion-btn {
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 5px;
  font-weight: 600;
}
.onion-btn:hover { background: #4097ef; }

.container { display: flex; min-height: calc(100vh - 100px); }

.sidebar {
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  width: 240px;
  padding: 1rem;
}

.nav-link {
  display: block;
  padding: 0.5rem;
  border-radius: 4px;
  color: var(--text);
  margin-bottom: 0.4rem;
}
.nav-link.active { background: var(--panel-bg); border-left: 3px solid var(--accent); }
.nav-link:hover { background: var(--panel-bg); color: var(--accent); }

.status-panel { margin-top: 1.5rem; font-size: 0.9rem; color: var(--text-muted); }
.badge { padding: 2px 6px; border-radius: 4px; font-size: 0.75rem; }
.badge-success { background: var(--success); color: #fff; }
.badge-info { background: var(--accent); color: #fff; }

main {
  flex: 1;
  padding: 2rem;
  max-width: 980px;
  margin: 0 auto;
}

.panel {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.8rem 2rem;
  margin-bottom: 2rem;
}

.panel-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* Terminal Simulation */
.terminal-box {
  background: #0a0e14;
  border-radius: 6px;
  border: 1px solid #222;
  margin-bottom: 1.5rem;
  font-family: var(--mono);
}
.terminal-header {
  background: #161b22;
  padding: 0.4rem 0.6rem;
  border-bottom: 1px solid #222;
  display: flex;
  align-items: center;
  gap: 6px;
}
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.red { background: #ff4444; }
.yellow { background: #ffb347; }
.green { background: #30cc72; }
.term-title { margin-left: 0.6rem; color: var(--text-muted); font-size: 0.8rem; }
.terminal-body { padding: 0.8rem 1rem; font-size: 0.85rem; }
.prompt { color: var(--accent); margin-right: 0.4rem; }
.output { color: var(--text); display: block; margin-left: 1.4rem; }
.output.success { color: var(--success); }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.guide-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  padding: 1rem;
  border-radius: 6px;
  transition: 0.2s;
}
.guide-card:hover { border-color: var(--accent); }

.cta-block { text-align: center; margin-top: 1.5rem; }
.cta-btn {
  background: var(--accent);
  color: #fff;
  padding: 0.7rem 1.4rem;
  border-radius: 6px;
  font-weight: 600;
}
.cta-btn:hover { background: #4097ef; }
.cta-note { font-size: 0.8rem; opacity: 0.7; margin-top: 0.6rem; }

.footer-grid {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 2rem;
  gap: 2rem;
}
.footer-col h3 { color: var(--text-muted); font-size: 0.8rem; margin-bottom: 0.6rem; }
.footer-col a { color: var(--text-muted); display: block; margin-bottom: 0.3rem; }
.footer-col a:hover { color: var(--accent); }
.footer-note {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  padding-bottom: 1rem;
  background: var(--bg-secondary);
}
.about-nexus .system-map {
  text-align: center;
  margin: 1.2rem 0 2rem;
}
.node {
  fill: var(--bg-secondary);
  stroke: var(--border);
  stroke-width: 1px;
}
.node.market { fill: #21262d; }
.node.api { fill: #1b4b91; }
.node.crypto { fill: #553b91; }
.node.mirror { fill: #25614f; }
.node-text {
  fill: var(--text);
  font-family: var(--mono);
  font-size: 12px;
}
.link {
  stroke: var(--accent);
  stroke-width: 1.5px;
  stroke-dasharray: 3 3;
  opacity: 0.7;
}

.metrics-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem 1.5rem;
  margin-bottom: 1.5rem;
}
.metric {
  text-align: center;
  flex: 1;
}
.metric + .metric { border-left: 1px solid var(--border); }
.metric-value {
  display: block;
  font-family: var(--mono);
  font-size: 1.3rem;
}
.metric-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.accent { color: var(--accent); }
.success { color: var(--success); }
.warning { color: var(--warning); }
.card-grid--2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.copy-btn {
  background: var(--bg-main);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8rem;
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  margin-right: 0.5rem;
  cursor: pointer;
  transition: 0.2s;
}
.copy-btn:hover { color: var(--accent); border-color: var(--accent); }
.copy-tip {
  opacity: 0;
  font-size: 0.75rem;
  color: var(--success);
  transition: opacity 0.2s ease;
}
.copy-tip.show { opacity: 1; }

.pgp-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  margin: 1rem 0;
}
.pgp-box pre {
  background: none;
  color: var(--text);
  overflow-x: auto;
  white-space: pre-wrap;
}
.fingerprint-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 1rem 0;
}
.small { padding: 2px 5px; font-size: 0.7rem; }


/* --- FIX: onion links wrap properly --- */
.guide-card p[id^="mirror"] {
  word-break: break-all;
  overflow-wrap: anywhere;
  white-space: normal;
  font-family: var(--mono);
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
  color: var(--text);
}
/* --- RESPONSIVE FIXES --- */
@media (max-width: 1024px) {
  .container {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    order: -1;
    border-right: none;
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    background: var(--bg-secondary);
  }
  .nav-block {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    padding-bottom: 1rem;
  }
  .nav-link {
    padding: 0.4rem 0.6rem;
    margin: 0;
    border-radius: 4px;
  }
  main {
    padding: 1.5rem 1rem;
    max-width: 100%;
  }
  .card-grid--2,
  .card-grid--3 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .hud-header {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
  .onion-btn {
    width: 100%;
  }
  .panel {
    padding: 1.2rem 1rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-col ul {
    padding: 0;
  }
}
.card-grid--3 { grid-template-columns: repeat(3, 1fr); gap: 1rem; }

@media (max-width: 1024px) {
  .card-grid--3 { grid-template-columns: 1fr; }
}
.node-text {
  fill: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  text-anchor: middle;
  dominant-baseline: middle;
}
/* --- GRID FIX: 2 cards on top + 1 full-width below --- */
.card-grid--2-1 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: auto auto;
  gap: 1rem;
}

.card-grid--2-1 .guide-card:nth-child(3) {
  grid-column: 1 / -1; /* растянуть третью карточку на всю ширину */
}

/* адаптив для мобильных */
@media (max-width: 1024px) {
  .card-grid--2-1 {
    grid-template-columns: 1fr;
  }
  .card-grid--2-1 .guide-card:nth-child(3) {
    grid-column: auto;
  }
}
/* FAQ accordion styling */
.faq-list { margin-top: 1rem; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--text);
  text-align: left;
  padding: 1rem;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.faq-question:hover { color: var(--accent); }
.faq-question.active { color: var(--accent); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background: var(--bg-secondary);
  padding: 0 1.2rem;
}
.faq-answer p { font-size: 0.9rem; padding: 0.6rem 0; color: var(--text-muted); }


/* wiki-specific tweaks */
.card-grid--2, .card-grid--3 {
  gap: 1rem;
}

.guide-card p {
  font-size: 0.9rem;
  line-height: 1.45;
}

@media (max-width: 1024px) {
  .card-grid--3 { grid-template-columns: 1fr; }
  .card-grid--2 { grid-template-columns: 1fr; }
}