:root {
  --bg: #0e1117;
  --panel: #151a23;
  --panel-2: #1c2330;
  --border: #232b3a;
  --text: #e6edf3;
  --muted: #8b97a8;
  --accent: #4d8bf5;
  --green-bright: #05ffa6;
  --green-dim: #00945f;
  --red-bright: #ff0a70;
  --red-dim: #990040;
  --gray: #888c95;
  --pos: #1ed27a;
  --neg: #ff5277;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #131927, #0e1117);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand h1 { margin: 0; font-size: 18px; }
.brand .sub { margin: 2px 0 0 0; color: var(--muted); font-size: 12px; }
.logo {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--green-bright), var(--red-bright));
  color: #0e1117;
  display: flex; align-items: center; justify-content: center;
  border-radius: 8px;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.kpi-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.kpi {
  background: var(--panel-2);
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  min-width: 110px;
}
.kpi label {
  display: block;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}
.kpi span {
  display: block;
  font-weight: 600;
  font-size: 15px;
  margin-top: 2px;
}
.status-idle { color: var(--muted); }
.status-running { color: var(--green-bright); }
.status-error { color: var(--red-bright); }

.grid {
  display: grid;
  grid-template-columns: minmax(320px, 380px) 1fr;
  gap: 14px;
  padding: 14px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
}
.card h2 {
  margin: 0 0 12px 0;
  font-size: 14px;
  letter-spacing: 0.5px;
  color: var(--muted);
  text-transform: uppercase;
}
.muted { color: var(--muted); font-weight: normal; }

.backtest-card { grid-column: 1 / -1; }
.settings { grid-row: span 3; }
.watchlist, .positions, .trades, .chart-card, .log-card { grid-column: 2; }
.meme-card, .meme-watchlist, .meme-positions, .meme-trades { grid-column: 1 / -1; }
.meme-form { grid-template-columns: repeat(4, 1fr); }
.inline-chk { display: inline-flex; align-items: center; gap: 4px; padding: 0; margin: 0; font-weight: normal; }
.inline-chk input { margin: 0; }
.bt-form { grid-template-columns: repeat(4, 1fr); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
  margin: 12px 0;
}
.stats-grid .stat {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
}
.stats-grid .stat label {
  display: block;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.stats-grid .stat span {
  display: block;
  font-weight: 600;
  font-size: 15px;
  margin-top: 2px;
}
#bt-equity-chart {
  width: 100%;
  height: 260px;
  display: block;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.bt-section-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 16px 0 8px 0;
}
@media (max-width: 1200px) {
  .bt-form { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .bt-form { grid-template-columns: repeat(2, 1fr); }
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.form-grid label {
  display: flex;
  flex-direction: column;
  font-size: 12px;
  color: var(--muted);
  gap: 4px;
}
.form-grid input, .form-grid select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 6px 8px;
  font-size: 13px;
}
.form-grid input:focus, .form-grid select:focus {
  outline: 1px solid var(--accent);
}
.btn-row {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}
button {
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}
button:hover { border-color: var(--accent); }
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
button.primary:hover { filter: brightness(1.1); }
button.danger { color: var(--red-bright); border-color: #4a2230; }
button.danger:hover { background: #2a1320; }
button.ghost { background: transparent; }
button:disabled { opacity: 0.4; cursor: not-allowed; }
.hint {
  margin-top: 10px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

.table-wrap {
  overflow-x: auto;
  max-height: 360px;
  overflow-y: auto;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
th, td {
  text-align: left;
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
th {
  position: sticky;
  top: 0;
  background: var(--panel);
  color: var(--muted);
  font-weight: 500;
  z-index: 1;
}
tr:hover td { background: rgba(255,255,255,0.02); }

.pos { color: var(--pos); }
.neg { color: var(--neg); }

.color-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
}
.color-bright-green { background: var(--green-bright); box-shadow: 0 0 6px var(--green-bright); }
.color-dim-green    { background: var(--green-dim); }
.color-bright-red   { background: var(--red-bright); box-shadow: 0 0 6px var(--red-bright); }
.color-dim-red      { background: var(--red-dim); }
.color-gray         { background: var(--gray); }

.signal-long  { color: var(--green-bright); font-weight: 600; }
.signal-short { color: var(--red-bright); font-weight: 600; }

.chart-card canvas {
  width: 100%;
  height: 220px;
  display: block;
}

#log {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
  max-height: 200px;
  overflow-y: auto;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 11px;
  white-space: pre-wrap;
  line-height: 1.5;
}

.footer {
  padding: 18px 24px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

@media (max-width: 1000px) {
  .grid { grid-template-columns: 1fr; }
  .settings { grid-row: auto; }
  .watchlist, .positions, .trades, .chart-card, .log-card { grid-column: 1; }
  .backtest-card { grid-column: 1; }
  .meme-card, .meme-watchlist, .meme-positions, .meme-trades { grid-column: 1; }
  .meme-form { grid-template-columns: repeat(2, 1fr); }
}

/* ============= strategy tabs ============= */
.tab-nav {
  display: flex;
  gap: 4px;
  padding: 8px 20px 0 20px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #0e1117, #131927);
  flex-wrap: wrap;
}
.tab-btn {
  appearance: none;
  background: transparent;
  color: var(--muted);
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 120ms, color 120ms, border-color 120ms;
  margin-bottom: -1px;
}
.tab-btn:hover {
  color: var(--text);
  background: rgba(77, 139, 245, 0.08);
}
.tab-btn.active {
  color: var(--text);
  background: var(--panel);
  border-color: var(--border);
  border-bottom-color: var(--panel);
}