:root {
  --bg: #0a0a0f;
  --surface: #111118;
  --border: #1e1e2e;
  --text: #e0e0e0;
  --muted: #666;
  --green: #00ff88;
  --red: #ff4466;
  --blue: #00d4ff;
  --purple: #7b2ff7;
  --nav-h: 40px;
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body {
  background: var(--bg); color: var(--text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  width: 100%;
}

/* ── Top nav bar ── */
header {
  display: flex; align-items: center; justify-content: center;
  height: var(--nav-h);
  background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
  overflow: hidden;
}

/* ── Nav links ── */
.top-nav { display: flex; align-items: center; gap: 0; }
.nav-link {
  padding: 0 14px; height: var(--nav-h); display: flex; align-items: center;
  text-decoration: none; color: var(--muted); font-size: 0.78rem; font-weight: 500;
  transition: color .15s; white-space: nowrap;
  border-bottom: 2px solid transparent;
}
.nav-link:hover { color: var(--text); }
.nav-link.active { color: var(--text); border-bottom-color: var(--blue); }

/* ── Layout ── */
.page { padding: 16px; max-width: 1400px; margin: 0 auto; overflow-x: hidden; }
.grid { display: grid; gap: 12px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }

/* ── Cards ── */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px;
  min-width: 0; overflow: hidden;
}
.card-title {
  font-size: 0.65rem; text-transform: uppercase; letter-spacing: 2px;
  color: var(--muted); margin-bottom: 10px;
}
.card-value { font-size: 1.7rem; font-weight: 700; }
.card-sub { font-size: 0.75rem; color: var(--muted); margin-top: 4px; }
.positive { color: var(--green) !important; }
.negative { color: var(--red) !important; }

/* ── Tables ── */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; max-width: 100%; }
table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
th {
  text-align: left; color: var(--muted); font-size: 0.65rem;
  text-transform: uppercase; letter-spacing: 1px;
  padding: 0 0 8px 0; border-bottom: 1px solid var(--border);
}
td { padding: 8px 0; border-bottom: 1px solid #161620; }
tr:last-child td { border-bottom: none; }
.side-buy  { color: var(--green); font-weight: 600; }
.side-sell { color: var(--red);   font-weight: 600; }

/* ── Inputs ── */
.input {
  width: 100%; background: #0d0d15; border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 12px; color: var(--text); font-size: 0.88rem; outline: none;
  transition: border-color .2s; -webkit-appearance: none;
}
.input:focus { border-color: var(--blue); }
.input-group { margin-bottom: 12px; }
.input-group label {
  display: block; font-size: 0.68rem; color: var(--muted);
  margin-bottom: 5px; text-transform: uppercase; letter-spacing: 1px;
}

/* ── Buttons ── */
.btn {
  padding: 10px 20px; border-radius: 8px; cursor: pointer; font-size: 0.85rem;
  font-weight: 600; transition: all .15s; border: 1px solid transparent;
  touch-action: manipulation;
}
.btn-primary { background: #00d4ff18; border-color: #00d4ff55; color: var(--blue); }
.btn-primary:hover, .btn-primary:active { background: #00d4ff28; }
.btn-danger  { background: #ff446618; border-color: #ff446655; color: var(--red); }
.btn-danger:hover, .btn-danger:active  { background: #ff446628; }
.btn-success { background: #00ff8818; border-color: #00ff8855; color: var(--green); }
.btn-full { width: 100%; }
.btn:disabled { opacity: .4; cursor: not-allowed; }

/* ── Toggle ── */
.toggle { position: relative; display: inline-block; width: 40px; height: 22px; flex-shrink: 0; }
.toggle input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; inset: 0; background: #333; border-radius: 22px; transition: .3s; }
.slider:before {
  position: absolute; content: ""; height: 16px; width: 16px;
  left: 3px; bottom: 3px; background: #fff; border-radius: 50%; transition: .3s;
}
input:checked + .slider { background: var(--green); }
input:checked + .slider:before { transform: translateX(18px); }

/* ── Logs ── */
.log-box { height: 180px; overflow-y: auto; font-size: 0.72rem; font-family: monospace; }
.log-line { padding: 2px 0; border-bottom: 1px solid #111; }
.log-INFO { color: var(--text); } .log-DEBUG { color: var(--muted); }
.log-WARNING { color: #ffaa00; } .log-ERROR { color: var(--red); }

/* ── Charts ── */
.chart-wrap { position: relative; height: 180px; }

/* ── Stat pill ── */
.stat-pill {
  display: inline-flex; align-items: center; gap: 8px;
  background: #0d0d15; border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 12px;
}
.dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.dot-green { background: var(--green); box-shadow: 0 0 6px var(--green); }
.dot-red   { background: var(--red); }
.dot-muted { background: var(--muted); }

/* ── Emergency button ── */
.btn-emergency {
  background: #2a0a0a; border: 1px solid var(--red); color: var(--red);
  padding: 6px 12px; border-radius: 8px; cursor: pointer;
  font-weight: 700; font-size: 0.78rem; white-space: nowrap;
}
.btn-emergency:hover, .btn-emergency:active { background: #3a0a0a; }

/* ── Mobile breakpoint ── */
@media (max-width: 768px) {
  .page { padding: 12px; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .col-span-2, .col-span-3 { grid-column: span 1; }
  .card { padding: 14px; border-radius: 10px; }
  .card-value { font-size: 1.5rem; }
  .chart-wrap { height: 150px; }
  .log-box { height: 140px; }
  /* Hide less important columns on small screens */
  .hide-mobile { display: none; }
}