:root {
  --bg: #0b0e11;
  --panel: #12161c;
  --panel-2: #1a1f27;
  --border: #2b3139;
  --text: #eaecef;
  --muted: #848e9c;
  --green: #0ecb81;
  --green-dim: rgba(14, 203, 129, 0.15);
  --red: #f6465d;
  --red-dim: rgba(246, 70, 93, 0.15);
  --accent: #f0b90b;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
}

.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 14px 18px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f7931a, #ffb84d);
  display: grid;
  place-items: center;
  font-weight: 700;
  color: #111;
  font-size: 20px;
}

.pair { font-size: 18px; font-weight: 600; }
.pair-sub { font-size: 12px; color: var(--muted); margin-top: 2px; }

.price-block { flex: 1; min-width: 180px; }

.live-price {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.price-change {
  font-size: 14px;
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}

.price-change.up { color: var(--green); }
.price-change.down { color: var(--red); }

.status-pill {
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--muted);
}

.status-pill.simulating {
  color: var(--accent);
  border-color: rgba(240, 185, 11, 0.4);
  background: rgba(240, 185, 11, 0.08);
}

.status-pill.frozen {
  color: var(--green);
  border-color: rgba(14, 203, 129, 0.35);
  background: rgba(14, 203, 129, 0.08);
}

.status-pill.frozen.down {
  color: var(--red);
  border-color: rgba(246, 70, 93, 0.35);
  background: rgba(246, 70, 93, 0.08);
}

.status-pill.reverting {
  color: #6ea8fe;
  border-color: rgba(110, 168, 254, 0.4);
  background: rgba(110, 168, 254, 0.08);
}

.chart-wrap {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 12px;
}

.chart-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.intervals { display: flex; gap: 6px; }

.interval {
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  font-size: 13px;
}

.interval:hover { color: var(--text); background: var(--panel-2); }
.interval.active {
  color: var(--text);
  background: var(--panel-2);
  border-color: var(--border);
}

.ohlc {
  font-size: 12px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

#chart { height: 420px; width: 100%; }
#volume { height: 90px; width: 100%; border-top: 1px solid var(--border); }

.controls {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}

.controls h2 {
  margin: 0 0 14px;
  font-size: 16px;
  font-weight: 600;
}

.direction-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 14px;
}

.dir-btn {
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 14px;
  border-radius: 10px;
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.15s ease;
}

.dir-btn.up.active {
  border-color: var(--green);
  background: var(--green-dim);
  color: var(--green);
}

.dir-btn.down.active {
  border-color: var(--red);
  background: var(--red-dim);
  color: var(--red);
}

.control-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

.field select {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  font: inherit;
}

.start-btn, .stop-btn {
  width: 100%;
  border: none;
  border-radius: 10px;
  padding: 14px;
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

.start-btn {
  background: linear-gradient(180deg, #f0b90b, #d9a407);
  color: #111;
}

.start-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.stop-btn {
  margin-top: 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
}

.hint {
  margin: 12px 0 0;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}

@media (max-width: 640px) {
  .live-price { font-size: 26px; }
  #chart { height: 320px; }
  .control-grid { grid-template-columns: 1fr; }
}