/* ---------- Design tokens ---------- */
:root {
  --bg: #0d0f12;
  --bg-elev: #14171c;
  --bg-elev-2: #1a1e24;
  --border: #232830;
  --border-strong: #2e343d;
  --text: #eef1f6;
  --text-dim: #a4acb8;
  --text-mute: #6d7683;
  --accent: #FF6600;
  --accent-2: #ff8a3d;
  --accent-soft: rgba(255, 102, 0, 0.12);
  --accent-glow: rgba(255, 102, 0, 0.35);
  --green: #2fd28a;
  --green-soft: rgba(47, 210, 138, 0.15);
  --red: #ff5876;
  --red-soft: rgba(255, 88, 118, 0.15);
  --blue: #6aa9ff;
  --font-sans: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sidenav-w: 220px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

body {
  background:
    radial-gradient(1200px 500px at 12% -10%, rgba(255,102,0,0.08), transparent 60%),
    radial-gradient(900px 400px at 90% -20%, rgba(255,102,0,0.05), transparent 60%),
    var(--bg);
}

a { color: var(--text); text-decoration: none; }
a:hover { color: var(--accent); }

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }

/* ---------- Side nav ---------- */
.sidenav {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidenav-w);
  background: rgba(13,15,18,0.85);
  backdrop-filter: blur(14px);
  border-right: 1px solid var(--border);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  z-index: 20;
}
.brand-mini { display: flex; align-items: center; gap: 10px; padding: 4px 8px 20px; border-bottom: 1px solid var(--border); margin-bottom: 12px; }
.brand-mini svg { width: 28px; height: 28px; }
.brand-mini-title { font-weight: 700; font-size: 14px; letter-spacing: -0.01em; }
.brand-mini-sub { font-size: 10px; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.08em; }
.sidenav-links { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.sidenav-links a {
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s ease;
  position: relative;
}
.sidenav-links a:hover { color: var(--text); background: var(--bg-elev-2); }
.sidenav-links a.active { color: var(--accent); background: var(--accent-soft); }
.sidenav-links a.active::before {
  content: ""; position: absolute; left: 0; top: 8px; bottom: 8px; width: 2px; background: var(--accent); border-radius: 2px;
}
.sidenav-footer {
  padding: 12px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-mute);
  font-family: var(--font-mono);
  display: flex; align-items: center; gap: 8px;
}
.sidenav-footer .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green); box-shadow: 0 0 8px var(--green);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%,100% {opacity:1;} 50% {opacity:0.4;} }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  margin-left: var(--sidenav-w);
  padding: 14px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(13,15,18,0.75);
  backdrop-filter: blur(10px);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 24px;
}
.ticker {
  display: flex;
  gap: 28px;
  align-items: center;
  flex-wrap: wrap;
}
.ticker-price, .ticker-meta { display: flex; flex-direction: column; gap: 2px; }
.ticker .label { font-size: 10px; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.08em; }
.ticker .value { font-family: var(--font-mono); font-weight: 600; font-size: 16px; }
.ticker-price .value { font-size: 20px; color: var(--accent); }
.ticker .delta { font-family: var(--font-mono); font-size: 11px; font-weight: 500; }

.controls { display: flex; align-items: center; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 7px 12px;
  border-radius: 8px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.btn:active { transform: scale(0.98); }
.btn.refreshing svg { animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Main layout ---------- */
main {
  margin-left: var(--sidenav-w);
  max-width: 1440px;
  padding: 32px 32px 40px;
  display: flex;
  flex-direction: column;
  gap: 44px;
}

.section-head { margin-bottom: 16px; }
.section-head h2 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.section-head h2::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-right: 12px;
  vertical-align: middle;
  transform: translateY(-3px);
  box-shadow: 0 0 12px var(--accent-glow);
}
.section-head p { margin: 6px 0 0 18px; font-size: 13px; color: var(--text-mute); }

/* ---------- Pair cards ---------- */
.pairs {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}
.pair-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  cursor: pointer;
  transition: all 0.15s ease;
  position: relative;
  overflow: hidden;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.pair-card:hover { border-color: var(--border-strong); transform: translateY(-1px); }
.pair-card.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 8px 24px -8px var(--accent-glow);
}
.pair-card .pair-label {
  font-size: 11px;
  color: var(--text-mute);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 6px;
}
.pair-card .pair-symbol {
  display: inline-flex;
  width: 18px; height: 18px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  font-weight: 700;
  color: white;
  font-family: var(--font-mono);
}
.pair-card .pair-value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.02em;
  margin-top: 6px;
}
.pair-card .pair-delta { font-family: var(--font-mono); font-size: 12px; font-weight: 500; margin-top: 2px; }
.up { color: var(--green); }
.down { color: var(--red); }
.flat { color: var(--text-mute); }
.pair-spark {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 42px;
  opacity: 0.9;
  pointer-events: none;
}

/* ---------- Panels ---------- */
.panel {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}
.panel-head {
  padding: 20px 22px 16px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
}
.panel h3 { margin: 0; font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
.panel-sub { margin: 4px 0 0; font-size: 12px; color: var(--text-mute); }

/* Chart */
.chart-panel { padding-bottom: 20px; }
.chart-tabs { display: flex; gap: 4px; background: var(--bg-elev-2); padding: 3px; border-radius: 8px; }
.tab {
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.tab:hover { color: var(--text); }
.tab.active { background: var(--accent); color: white; }

.chart-range { display: flex; gap: 4px; padding: 12px 22px 0; }
.rng {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.rng:hover { color: var(--text); border-color: var(--border-strong); }
.rng.active { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }

.chart-wrap { padding: 16px 22px 0; height: 340px; position: relative; }
.depth-wrap { height: 300px; padding-bottom: 20px; }
.block-chart-wrap { height: 240px; padding-bottom: 20px; }

/* Segmented controls */
.seg { display: flex; background: var(--bg-elev-2); border-radius: 8px; padding: 3px; }
.seg-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.seg-btn:hover { color: var(--text); }
.seg-btn.active { background: var(--accent); color: white; }

/* Depth stats */
.depth-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
}
.depth-stat { background: var(--bg-elev); padding: 12px 22px; }
.depth-stat .k { font-size: 10px; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.08em; }
.depth-stat .v { font-family: var(--font-mono); font-weight: 600; font-size: 14px; margin-top: 4px; }
.depth-stat.bid .v { color: var(--green); }
.depth-stat.ask .v { color: var(--red); }

/* Orderbook */
.orderbook {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border-top: 1px solid var(--border);
}
.ob-half { background: var(--bg-elev); }
.ob-head, .ob-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  padding: 8px 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  align-items: center;
}
.ob-head {
  background: var(--bg-elev-2);
  color: var(--text-mute);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 10px;
}
.ob-half:last-child .ob-head { text-align: right; }
.ob-half:last-child .ob-row { text-align: right; }
.ob-rows { max-height: 280px; overflow-y: auto; }
.ob-row {
  position: relative;
  overflow: hidden;
}
.ob-row .bar {
  position: absolute;
  top: 0; bottom: 0;
  right: 0;
  z-index: 0;
  opacity: 0.14;
}
.ob-half:last-child .ob-row .bar { right: auto; left: 0; }
.ob-row.bid .bar { background: var(--green); }
.ob-row.ask .bar { background: var(--red); }
.ob-row > * { position: relative; z-index: 1; }
.ob-row .price.bid { color: var(--green); font-weight: 600; }
.ob-row .price.ask { color: var(--red); font-weight: 600; }
.ob-row .cum { color: var(--text-mute); }

/* Exchanges */
.ex-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
}
.ex-card {
  background: var(--bg-elev);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 200px;
}
.ex-head { display: flex; align-items: center; justify-content: space-between; }
.ex-name { font-size: 13px; font-weight: 600; letter-spacing: -0.01em; }
.ex-name a { color: var(--text); }
.ex-pair { font-family: var(--font-mono); font-size: 11px; color: var(--text-mute); background: var(--bg-elev-2); padding: 3px 8px; border-radius: 6px; }
.ex-price { font-family: var(--font-mono); font-size: 22px; font-weight: 600; letter-spacing: -0.02em; }
.ex-price small { font-size: 12px; color: var(--text-mute); font-weight: 400; margin-left: 6px; }
.ex-change { font-family: var(--font-mono); font-size: 12px; font-weight: 500; }
.ex-stats { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; margin-top: auto; padding-top: 10px; border-top: 1px solid var(--border); }
.ex-stat .k { font-size: 10px; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.05em; }
.ex-stat .v { font-family: var(--font-mono); font-size: 12px; font-weight: 600; margin-top: 2px; }

/* Network grid */
.net-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}
.net-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
}
.net-card .k { font-size: 10px; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.08em; }
.net-card .v {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-top: 6px;
}
.net-card .sub {
  margin-top: 6px;
  font-size: 11px;
  color: var(--text-mute);
  font-family: var(--font-mono);
}
.net-card.accent .v { color: var(--accent); }

/* Blocks table */
.blocks-table { padding: 8px 0; }
.bt-head, .bt-row {
  display: grid;
  grid-template-columns: 120px 1fr 80px 100px 80px;
  gap: 16px;
  padding: 10px 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  align-items: center;
}
.bt-head {
  color: var(--text-mute);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
  margin-bottom: 4px;
}
.bt-row { border-bottom: 1px solid var(--border); transition: background 0.15s ease; }
.bt-row:hover { background: var(--bg-elev-2); }
.bt-row:last-child { border-bottom: none; }
.bt-height a { color: var(--accent); font-weight: 600; }
.bt-time { color: var(--text-dim); }
.bt-txs { color: var(--text); font-weight: 500; }
.bt-size { color: var(--text-dim); }
.bt-age { color: var(--text-mute); text-align: right; }

/* News */
.news-list { list-style: none; margin: 0; padding: 0; max-height: 720px; overflow-y: auto; }
.news-list::-webkit-scrollbar { width: 8px; }
.news-list::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }
.news-item {
  padding: 16px 22px;
  border-bottom: 1px solid var(--border);
  display: block;
  transition: background 0.15s ease;
}
.news-item:hover { background: var(--bg-elev-2); }
.news-item:last-child { border-bottom: none; }
.news-meta { display: flex; align-items: center; gap: 10px; font-size: 11px; color: var(--text-mute); margin-bottom: 6px; }
.news-domain {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--accent);
  font-weight: 500;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: lowercase;
  letter-spacing: 0.02em;
}
.news-domain::before {
  content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); display: inline-block;
}
.news-date { font-family: var(--font-mono); font-size: 10px; }
.news-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  margin: 0 0 6px;
  letter-spacing: -0.005em;
}
.news-snippet {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.55;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Transactions */
.tx-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
}
.tx-stat { background: var(--bg-elev); padding: 14px 22px; }
.tx-stat .k { font-size: 10px; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.08em; }
.tx-stat .v { font-family: var(--font-mono); font-weight: 600; font-size: 15px; margin-top: 4px; }

.tx-list { list-style: none; margin: 0; padding: 0; max-height: 620px; overflow-y: auto; }
.tx-list::-webkit-scrollbar { width: 8px; }
.tx-list::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }
.tx-row-wrap { list-style: none; }
.tx-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  padding: 12px 22px;
  border-bottom: 1px solid var(--border);
  align-items: center;
  transition: background 0.15s ease;
}
.tx-row:hover { background: var(--bg-elev-2); }
.tx-row:last-child { border-bottom: none; }
.tx-left { min-width: 0; }
.tx-hash {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text);
  text-decoration: none;
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 500;
}
.tx-hash:hover { color: var(--accent); }
.tx-sub {
  font-size: 10px;
  color: var(--text-mute);
  margin-top: 3px;
  display: flex;
  gap: 12px;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}
.tx-fee { font-family: var(--font-mono); font-size: 12px; font-weight: 600; color: var(--accent); text-align: right; white-space: nowrap; }
.tx-fee-sub { font-size: 10px; color: var(--text-mute); font-weight: 400; margin-top: 3px; }
.tx-badge {
  display: inline-block;
  font-size: 9px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--accent-soft);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-right: 6px;
}
.tx-badge.coinbase { background: var(--green-soft); color: var(--green); }

/* Community links */
.link-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.link-group {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 22px;
}
.link-group h4 {
  margin: 0 0 14px;
  font-size: 11px;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}
.link-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.link-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--text-dim);
  font-size: 13px;
  transition: all 0.15s ease;
  border: 1px solid transparent;
}
.link-list a:hover { color: var(--accent); background: var(--accent-soft); border-color: var(--accent); }
.link-list a .arrow { font-size: 11px; color: var(--text-mute); }
.link-list a:hover .arrow { color: var(--accent); }
.link-list .desc { display: block; font-size: 11px; color: var(--text-mute); margin-top: 2px; }

/* Skeletons & empty */
.skeleton {
  height: 60px;
  background: linear-gradient(90deg, var(--bg-elev-2) 25%, var(--bg-elev) 50%, var(--bg-elev-2) 75%);
  background-size: 400% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: 8px;
  list-style: none;
}
.skeleton.tx, .skeleton.bt { height: 50px; margin: 4px 0; }
.skeleton.ex, .skeleton.net { height: 180px; }
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.empty {
  padding: 40px 22px;
  text-align: center;
  color: var(--text-mute);
  font-size: 13px;
}
.empty small { display: block; margin-top: 8px; font-size: 11px; color: var(--red); }

/* Footer */
footer {
  margin-left: var(--sidenav-w);
  padding: 24px 32px 40px;
  border-top: 1px solid var(--border);
  color: var(--text-mute);
  font-size: 12px;
  text-align: center;
  margin-top: 20px;
}
footer a { color: var(--text-dim); }
footer a:hover { color: var(--accent); }

/* Responsive */
@media (max-width: 1200px) {
  .pairs { grid-template-columns: repeat(3, 1fr); }
  .net-grid { grid-template-columns: repeat(2, 1fr); }
  .ex-grid { grid-template-columns: repeat(2, 1fr); }
  .link-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  :root { --sidenav-w: 0px; }
  .sidenav {
    position: static;
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 12px 16px;
  }
  .brand-mini { padding-bottom: 12px; margin-bottom: 8px; }
  .sidenav-links { flex-direction: row; overflow-x: auto; gap: 4px; }
  .sidenav-links a { padding: 6px 10px; font-size: 12px; white-space: nowrap; }
  .sidenav-links a.active::before { display: none; }
  .sidenav-footer { border-top: none; padding: 8px 0 0; }
  .topbar { margin-left: 0; padding: 12px 16px; grid-template-columns: 1fr; }
  main, footer { margin-left: 0; padding-left: 16px; padding-right: 16px; }
  .pairs { grid-template-columns: repeat(2, 1fr); }
  .net-grid, .ex-grid, .link-grid { grid-template-columns: 1fr; }
  .chart-wrap { height: 260px; }
  .depth-wrap { height: 240px; }
  .orderbook { grid-template-columns: 1fr; }
  .bt-head, .bt-row { grid-template-columns: 80px 1fr 60px 80px 70px; padding-left: 16px; padding-right: 16px; font-size: 11px; }
}