/* ─── tokens ─────────────────────────────────────────────────────────────── */
:root {
  --bg:        #0a0a0a;
  --bg-panel:  #111111;
  --bg-elev:   #161616;
  --bg-hover:  #1a1a1a;
  --border:    #1f1f1f;
  --border-hi: #2a2a2a;
  --text:      #e5e5e5;
  --text-dim:  #888;
  --text-mute: #555;
  --accent:    #10b981;
  --accent-dim:#065f46;
  --danger:    #ef4444;
  --warn:      #f59e0b;
  --info:      #3b82f6;
  --radius:    6px;
  --radius-sm: 4px;
  --font:      -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono:      ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  background: var(--bg); color: var(--text);
  font-family: var(--font); font-size: 13px; line-height: 1.45;
  display: flex; overflow: hidden;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: transparent; border: 0; cursor: pointer; }
input, select, textarea {
  font: inherit; color: var(--text); background: var(--bg-elev);
  border: 1px solid var(--border-hi); border-radius: var(--radius-sm);
  padding: 6px 8px; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
input[type="checkbox"] { width: 14px; height: 14px; accent-color: var(--accent); }

/* ─── sidebar ────────────────────────────────────────────────────────────── */
#sidebar {
  width: 220px; flex-shrink: 0;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  padding: 14px 10px;
}
.logo { font-size: 18px; font-weight: 700; padding: 6px 8px 18px; display: flex; align-items: center; gap: 8px; color: var(--accent); }
.logo-icon { font-size: 20px; }
.logo-text { letter-spacing: 1px; }
#nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
#nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border-radius: var(--radius-sm);
  color: var(--text-dim); font-size: 13px;
  transition: background 0.1s, color 0.1s;
}
#nav a:hover { background: var(--bg-hover); color: var(--text); }
#nav a.active { background: var(--accent-dim); color: #fff; }
#nav a span:first-child { font-size: 15px; width: 18px; text-align: center; }
.mini-badge {
  margin-left: auto; background: var(--accent); color: #000;
  font-size: 10px; font-weight: 700; padding: 1px 6px; border-radius: 8px;
  display: none;
}
.mini-badge.visible { display: inline-block; }
#sidebar-footer { border-top: 1px solid var(--border); padding: 10px 8px 0; font-size: 11px; color: var(--text-dim); }
.footer-stat { padding: 2px 0; }
.footer-stat.muted { color: var(--text-mute); font-size: 10px; }
.lang-switch { display: flex; gap: 4px; margin-bottom: 8px; }
.lang-switch button {
  flex: 1; padding: 4px 0; font-size: 10px; font-weight: 600;
  border: 1px solid var(--border-hi); border-radius: var(--radius-sm);
  background: var(--bg-elev); color: var(--text-dim);
  letter-spacing: 0.08em;
}
.lang-switch button:hover { color: var(--text); border-color: var(--accent); }
.lang-switch button.active { background: var(--accent); color: #000; border-color: var(--accent); }

/* ─── main ───────────────────────────────────────────────────────────────── */
#main { flex: 1; overflow: auto; padding: 20px 24px; }
.view { max-width: 1700px; }

/* ─── common bits ────────────────────────────────────────────────────────── */
h1 { font-size: 20px; font-weight: 600; margin-bottom: 16px; }
h2 { font-size: 14px; font-weight: 600; margin: 20px 0 10px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; }
h3 { font-size: 13px; font-weight: 600; margin-bottom: 8px; }
.muted { color: var(--text-dim); }
.mono { font-family: var(--mono); font-size: 12px; }
.pill {
  display: inline-block; font-size: 11px; padding: 2px 6px; border-radius: 3px;
  background: var(--bg-elev); color: var(--text-dim);
  border: 1px solid var(--border-hi);
}
.pos { color: var(--accent); }
.neg { color: var(--danger); }
.dim { color: var(--text-dim); }
.hidden { display: none !important; }
.row { display: flex; gap: 12px; }
.col { display: flex; flex-direction: column; gap: 12px; }

/* ─── status badges ──────────────────────────────────────────────────────── */
.badge {
  display: inline-block; font-size: 10px; padding: 2px 6px; border-radius: 3px;
  font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em;
}
.badge-done    { background: var(--accent-dim); color: #d1fae5; }
.badge-running { background: #1e40af; color: #dbeafe; }
.badge-pending { background: var(--bg-elev); color: var(--text-dim); border: 1px solid var(--border-hi); }
.badge-failed  { background: #7f1d1d; color: #fecaca; }

/* ─── cards / panels ─────────────────────────────────────────────────────── */
.panel { background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; }
.card { background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; }
.card.clickable { cursor: pointer; transition: border-color 0.1s; }
.card.clickable:hover { border-color: var(--border-hi); }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 16px; }
.stat-card {
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 16px;
}
.stat-card .label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-dim); margin-bottom: 4px; }
.stat-card .value { font-size: 22px; font-weight: 600; }
.stat-card .sub   { font-size: 11px; color: var(--text-dim); margin-top: 2px; }

/* ─── metrics row (backtest detail) ──────────────────────────────────────── */
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.metric {
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 10px 12px;
}
.metric .label { font-size: 10px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; }
.metric .value { font-size: 17px; font-weight: 600; margin-top: 2px; }
.metric[title] { cursor: help; }
.info-mark { color: var(--text-mute); font-size: 9px; margin-left: 2px; opacity: 0.7; }
.metric:hover .info-mark { opacity: 1; color: var(--accent); }

/* ─── tables ─────────────────────────────────────────────────────────────── */
table { width: 100%; border-collapse: collapse; font-size: 12px; }
th, td { padding: 6px 10px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
th { font-weight: 500; color: var(--text-dim); font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; background: var(--bg-panel); position: sticky; top: 0; z-index: 1; }
tbody tr:hover { background: var(--bg-hover); }
tbody tr.active { background: var(--bg-elev); }
.table-wrap { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--bg-panel); }
.table-scroll { max-height: 420px; overflow: auto; }
.num { text-align: right; font-variant-numeric: tabular-nums; font-family: var(--mono); }

/* ─── backtests split layout ─────────────────────────────────────────────── */
.split {
  display: grid; grid-template-columns: 380px 1fr; gap: 16px;
  align-items: start;
}
.split-list {
  max-height: calc(100vh - 60px); overflow-y: auto;
  display: flex; flex-direction: column; gap: 6px;
}
.bt-item {
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 10px 12px; cursor: pointer; transition: border-color 0.1s;
}
.bt-item:hover { border-color: var(--border-hi); }
.bt-item.active { border-color: var(--accent); background: var(--bg-elev); }
.bt-item .bt-row1 { display: flex; align-items: center; gap: 6px; font-weight: 500; }
.bt-item .bt-sym { color: var(--text-dim); font-size: 12px; font-family: var(--mono); }
.bt-item .bt-row2 { font-size: 11px; color: var(--text-dim); margin: 3px 0; }
.bt-item .bt-row3 { display: flex; gap: 10px; font-size: 12px; font-family: var(--mono); }
.bt-item .bt-row4 { margin-top: 4px; font-size: 10px; color: var(--text-mute); display: flex; justify-content: space-between; align-items: center; }
.bt-item .compare-check { margin-right: 6px; }

.filter-bar {
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 10px 12px; display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-bottom: 8px;
}
.filter-bar label { font-size: 10px; color: var(--text-dim); text-transform: uppercase; display: block; margin-bottom: 2px; }
.filter-bar select, .filter-bar input { width: 100%; }

/* ─── charts ─────────────────────────────────────────────────────────────── */
.chart-wrap { background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; }
.chart-box { position: relative; width: 100%; }

/* ─── forms ──────────────────────────────────────────────────────────────── */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-field { display: flex; flex-direction: column; gap: 4px; }
.form-field label { font-size: 11px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; }
.btn {
  background: var(--accent); color: #000; padding: 8px 14px;
  border-radius: var(--radius); font-weight: 600; cursor: pointer;
  transition: opacity 0.1s;
}
.btn:hover { opacity: 0.9; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-secondary { background: var(--bg-elev); color: var(--text); border: 1px solid var(--border-hi); }
.btn-danger { background: var(--danger); color: #fff; }

details { border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 12px; background: var(--bg-panel); }
details + details { margin-top: 8px; }
summary { cursor: pointer; font-weight: 500; list-style: none; }
summary::marker { content: ''; }
summary::before { content: '▸ '; color: var(--text-dim); }
details[open] summary::before { content: '▾ '; }
.details-body { padding-top: 10px; }

.symbol-pick {
  max-height: 180px; overflow-y: auto;
  border: 1px solid var(--border-hi); border-radius: var(--radius-sm);
  padding: 6px 8px; background: var(--bg-elev);
  display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 4px;
}
.symbol-pick label { display: flex; gap: 4px; align-items: center; font-size: 12px; font-family: var(--mono); }

/* ─── toasts ─────────────────────────────────────────────────────────────── */
#toasts { position: fixed; bottom: 20px; right: 20px; z-index: 1000; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--bg-panel); border: 1px solid var(--border-hi);
  border-radius: var(--radius); padding: 10px 14px;
  min-width: 240px; box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  animation: toast-in 0.15s ease-out;
}
.toast.success { border-left: 3px solid var(--accent); }
.toast.error   { border-left: 3px solid var(--danger); }
.toast.info    { border-left: 3px solid var(--info); }
@keyframes toast-in { from { opacity: 0; transform: translateX(10px); } to { opacity: 1; transform: translateX(0); } }

/* ─── heatmap ────────────────────────────────────────────────────────────── */
.heatmap { display: grid; gap: 1px; background: var(--border); border: 1px solid var(--border); }
.heatmap-cell { padding: 6px 8px; background: var(--bg-panel); font-size: 11px; font-family: var(--mono); text-align: center; min-width: 60px; }
.heatmap-cell.header { background: var(--bg-elev); color: var(--text-dim); font-weight: 600; }

/* ─── misc ───────────────────────────────────────────────────────────────── */
.loading { padding: 40px; text-align: center; color: var(--text-dim); font-size: 12px; }
.empty { padding: 40px; text-align: center; color: var(--text-mute); font-size: 12px; }
.kv-list { display: grid; grid-template-columns: max-content 1fr; gap: 4px 14px; font-size: 12px; }
.kv-list dt { color: var(--text-dim); }
.kv-list dd { font-family: var(--mono); }
pre.json { background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 8px 10px; font-size: 11px; overflow-x: auto; }

.spacer-sm { height: 8px; }
.spacer    { height: 16px; }

/* ─── guide view ─────────────────────────────────────────────────────────── */
.guide-layout { display: grid; grid-template-columns: 220px 1fr; gap: 24px; align-items: start; }
.guide-toc {
  position: sticky; top: 0;
  display: flex; flex-direction: column; gap: 2px;
  background: var(--bg-panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 10px;
  max-height: calc(100vh - 60px); overflow-y: auto;
}
.guide-toc-link {
  padding: 6px 10px; border-radius: var(--radius-sm);
  color: var(--text-dim); font-size: 12px;
}
.guide-toc-link:hover { background: var(--bg-hover); color: var(--text); }
.guide-toc-link.active { background: var(--accent-dim); color: #fff; }

.guide-body { max-width: 860px; }
.guide-section { margin-bottom: 36px; scroll-margin-top: 20px; }
.guide-h2 { font-size: 18px; font-weight: 600; margin-bottom: 8px; color: var(--text); text-transform: none; letter-spacing: normal; }
.guide-intro { color: var(--text-dim); margin-bottom: 12px; max-width: 680px; }

.guide-card {
  background: var(--bg-panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 12px 14px; margin-bottom: 10px;
}
.guide-card-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 6px; }
.guide-card-name { font-weight: 600; font-size: 14px; }
.guide-card-formula { font-size: 11px; color: var(--text-dim); background: var(--bg-elev); padding: 2px 6px; border-radius: var(--radius-sm); }
.guide-card-desc { font-size: 13px; line-height: 1.55; color: var(--text); margin-bottom: 8px; }

.guide-ranges { display: flex; flex-direction: column; gap: 4px; margin-top: 8px; }
.guide-range { display: flex; gap: 10px; padding: 4px 10px; border-left: 3px solid var(--border-hi); background: var(--bg-elev); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-size: 12px; }
.guide-range-label { min-width: 80px; color: var(--text); }
.guide-range-desc  { color: var(--text-dim); }

.guide-tip { margin-top: 8px; padding: 6px 10px; background: var(--bg-elev); border-left: 3px solid var(--accent); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-size: 12px; color: var(--text-dim); }
.guide-tip strong { color: var(--accent); margin-right: 4px; }

.guide-list, .guide-steps {
  margin-left: 20px; font-size: 13px; line-height: 1.65; color: var(--text);
  margin-bottom: 10px;
}
.guide-list li, .guide-steps li { margin-bottom: 6px; }
.guide-steps { list-style: decimal; }
.guide-list { list-style: disc; }

.guide-scorecard { display: flex; flex-direction: column; gap: 6px; }
.score-row { display: grid; grid-template-columns: 120px 1fr; gap: 12px; padding: 10px 12px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--bg-panel); align-items: center; font-size: 12px; }
.score-label { font-size: 13px; font-weight: 600; }
.score-green  { border-left: 3px solid var(--accent); }
.score-yellow { border-left: 3px solid var(--warn); }
.score-red    { border-left: 3px solid var(--danger); }