:root {
  /* Monochrome terminal palette: greys on near-black; green/red only for +/-. */
  --bg: #0b0c0e;
  --panel: #101113;
  --panel-2: #16181b;
  --border: #2a2d31;
  --grid: #2a2d31;
  --fg: #d4d6d9;
  --bright: #f4f5f6;
  --muted: #7d8187;
  --pos: #4ec07d;
  --neg: #df615d;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", "DejaVu Sans Mono", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 13px/1.45 var(--mono);
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--fg); color: var(--bg); }

a { color: var(--bright); text-decoration: underline; }
code {
  background: var(--panel-2);
  border: 1px solid var(--border);
  padding: 0 4px;
  font-size: 12px;
  font-family: var(--mono);
}

/* thin terminal scrollbars */
* { scrollbar-width: thin; scrollbar-color: var(--border) transparent; }
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-thumb { background: var(--border); }
::-webkit-scrollbar-track { background: transparent; }

/* ---- header / tabs ---- */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 9px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.brand { display: flex; align-items: baseline; gap: 8px; }
.logo { color: var(--muted); font-size: 14px; }
header h1 {
  font-size: 13px;
  margin: 0;
  font-weight: 600;
  color: var(--bright);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
header .sep { color: var(--muted); margin: 0 4px; font-weight: 400; }

.tabs { display: flex; gap: 8px; }
.tab {
  background: transparent;
  color: var(--muted);
  border: none;
  padding: 4px 4px;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.tab::before { content: "["; color: var(--muted); margin-right: 2px; }
.tab::after { content: "]"; color: var(--muted); margin-left: 2px; }
.tab:hover { color: var(--fg); }
.tab.on { color: var(--bright); }

.meta-bar {
  padding: 6px 16px;
  font-size: 11.5px;
  color: var(--muted);
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.meta-bar strong { color: var(--bright); font-weight: 600; }
.meta-bar .error { color: var(--neg); }
.sample-note {
  padding: 8px 16px;
  font-size: 12px;
  background: rgba(223, 97, 93, 0.08);
  color: var(--fg);
  border-bottom: 1px solid var(--border);
  border-left: 2px solid var(--neg);
}

/* ---- panels / layout ---- */
.panel { display: none; }
.panel.on { display: block; }

.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 14px;
  padding: 14px 16px;
  align-items: start;
}
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
}

.controls {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 12px;
  position: sticky;
  top: 12px;
}
.control-block { margin-bottom: 13px; }
.control-block:last-child { margin-bottom: 0; }
.control-label {
  display: block;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 5px;
}
.control-label .hint {
  text-transform: none; letter-spacing: 0; display: block; font-size: 10.5px;
}

select, input[type="text"] {
  width: 100%;
  background: var(--panel-2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 6px 8px;
  font-size: 12.5px;
  font-family: var(--mono);
}
select:focus, input[type="text"]:focus {
  outline: none;
  border-color: var(--fg);
}
input[type="checkbox"] { accent-color: var(--fg); }

/* presets */
.presets { display: flex; flex-wrap: wrap; gap: 5px; }
.preset-btn {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 4px 9px;
  font-size: 11.5px;
  font-family: var(--mono);
  cursor: pointer;
}
.preset-btn:hover { color: var(--fg); border-color: var(--muted); }
.preset-btn.on {
  background: var(--bright); color: var(--bg); border-color: var(--bright);
}

/* metric toggles */
.metric-toggles {
  max-height: 320px;
  overflow-y: auto;
  border: 1px solid var(--border);
  padding: 7px;
  background: var(--panel-2);
}
.metric-group { margin-bottom: 8px; }
.metric-group-title {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 4px 0;
}
.metric-check {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  padding: 2px 0;
  cursor: pointer;
}
.metric-check .dir { margin-left: auto; color: var(--muted); font-size: 10.5px; }

.checkbox label { display: flex; align-items: center; gap: 7px; font-size: 12.5px; cursor: pointer; }

button.primary-btn {
  width: 100%;
  background: transparent;
  color: var(--bright);
  border: 1px solid var(--fg);
  border-radius: 0;
  padding: 8px;
  font-size: 12.5px;
  font-weight: 600;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
}
button.primary-btn:hover { background: var(--bright); color: var(--bg); }
.ghost-btn {
  width: 100%;
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 7px;
  cursor: pointer;
  font-size: 12px;
  font-family: var(--mono);
}
.ghost-btn:hover { color: var(--fg); border-color: var(--muted); }

/* ---- results ---- */
.result { min-width: 0; }
.result-head { margin-bottom: 6px; }
.muted { color: var(--muted); }
.small { font-size: 11.5px; }

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.data-table th, .data-table td {
  padding: 5px 10px;
  text-align: left;
  white-space: nowrap;
  border-bottom: 1px solid var(--border);
}
.data-table th {
  position: sticky;
  top: 0;
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  user-select: none;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: 11px;
}
.data-table th.sorted { color: var(--bright); }
.data-table th.num, .data-table td.num { text-align: right; }
.data-table tbody tr:hover { background: var(--panel-2); }
.data-table .ticker { font-weight: 600; color: var(--bright); }
.data-table .name {
  max-width: 220px; overflow: hidden; text-overflow: ellipsis; color: var(--muted);
}
.data-table .sector { color: var(--muted); font-size: 11px; }
.data-table .rank { color: var(--muted); }
.data-table .score { font-weight: 700; color: var(--bright); }
.data-table .pos { color: var(--pos); }
.data-table .neg { color: var(--neg); }

/* ---- backtest stats + chart ---- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}
.stat {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 9px 11px;
}
.stat-k { font-size: 10.5px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }
.stat-v { font-size: 18px; font-weight: 700; margin-top: 2px; color: var(--bright); }
.stat-v.pos { color: var(--pos); }
.stat-v.neg { color: var(--neg); }

.chart-wrap {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 8px;
}
#equity-chart { width: 100%; height: 360px; display: block; }

.warn {
  background: rgba(223, 97, 93, 0.08);
  color: var(--fg);
  border: 1px solid var(--border);
  border-left: 2px solid var(--neg);
  padding: 9px 11px;
  margin-bottom: 10px;
  font-size: 12px;
}

/* ---- about ---- */
.about {
  max-width: 760px;
  padding: 20px 16px;
  margin: 0 auto;
  line-height: 1.6;
}
.about h2 {
  margin-top: 0;
  font-size: 16px;
  color: var(--bright);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.about h3 {
  color: var(--bright);
  margin-top: 22px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.about ul { padding-left: 18px; }
.about li { margin-bottom: 8px; }