/* Strategy backtester page. Reuses the dashboard tokens from style.css. */

.brand { text-decoration: none; color: inherit; }

.bt-wrap {
  position: relative;
  z-index: 1;
  width: min(1320px, 100%);
  margin: 0 auto;
  padding: 24px 28px 60px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* ---------- error / loading ---------- */
.bt-error,
.bt-loading {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
}
.bt-error { border-color: rgba(239, 68, 68, 0.35); }
.bt-error[hidden],
.bt-loading[hidden],
#btResults[hidden] { display: none; }
.bt-error .error-icon {
  flex: none;
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 50%;
  font-weight: 800;
  color: #2b0d0d;
  background: var(--red);
}
.bt-error h2,
.bt-loading h2 { margin: 0; font-size: 15px; }
.bt-error p,
.bt-loading p { margin: 3px 0 0; font-size: 12.5px; color: var(--muted); }
.bt-error .btn { margin-left: auto; }
.bt-loading .spinner {
  flex: none;
  width: 30px; height: 30px;
  border-radius: 50%;
  border: 3px solid rgba(148, 163, 184, 0.18);
  border-top-color: var(--green);
  animation: spin 0.9s linear infinite;
}

/* ---------- controls ---------- */
.bt-controls .panel-head { flex-wrap: wrap; }
.bt-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 12px;
  padding: 16px 18px 18px;
}
.bt-field { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.bt-field > span {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--dim);
  white-space: nowrap;
}
.bt-field input,
.bt-field select {
  width: 100%;
  padding: 8px 9px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: rgba(8, 12, 19, 0.65);
  color: var(--text);
  font: inherit;
  font-size: 12.5px;
  outline: none;
}
.bt-field input:focus,
.bt-field select:focus { border-color: rgba(45, 212, 191, 0.5); box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.08); }
.bt-form.busy { opacity: 0.65; pointer-events: none; }
.bt-actions {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 2px;
}
.bt-actions .btn { min-width: 130px; justify-content: center; }

/* ---------- stats ---------- */
.bt-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.bt-stat {
  position: relative;
  padding: 15px 16px 13px;
  border-radius: 13px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(23, 34, 52, 0.85), rgba(13, 20, 31, 0.85));
  overflow: hidden;
}
.bt-stat-label { font-size: 10.5px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--dim); }
.bt-stat-value { margin-top: 3px; font-size: 26px; font-weight: 720; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.bt-stat-note { margin-top: 2px; font-size: 11px; color: var(--muted); }
.bt-stat.good .bt-stat-value { color: #4ade80; }
.bt-stat.bad .bt-stat-value { color: var(--red); }
.bt-stat.warn .bt-stat-value { color: var(--amber); }
.bt-stat.flat .bt-stat-value { color: var(--muted); }

/* ---------- chart ---------- */
.bt-chart-panel .panel-head { flex-wrap: wrap; }
.bt-chart-wrap {
  position: relative;
  margin: 16px 16px 10px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(5, 9, 15, 0.82);
  overflow: hidden;
}
#btChart {
  display: block;
  width: 100%;
  height: 320px;
  outline: none;
  cursor: crosshair;
}
.chart-tooltip {
  position: absolute;
  z-index: 5;
  width: 188px;
  padding: 9px 10px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: rgba(9, 15, 24, 0.96);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.45);
  pointer-events: none;
  font-size: 11px;
  color: var(--muted);
  backdrop-filter: blur(8px);
}
.chart-tooltip[hidden] { display: none; }
.chart-tooltip .tt-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 8px;
  padding-bottom: 6px; margin-bottom: 6px;
  border-bottom: 1px solid var(--line);
  color: var(--text); font-weight: 600; font-size: 11.5px;
}
.chart-tooltip .tt-tz { color: var(--dim); font-size: 9px; letter-spacing: 0.08em; }
.chart-tooltip .tt-grid { display: grid; grid-template-columns: auto 1fr; gap: 3px 10px; }
.chart-tooltip .tt-grid b { color: #d8e3f2; font-weight: 600; font-variant-numeric: tabular-nums; text-align: right; }
.chart-tooltip .tt-up { color: #4ade80 !important; }
.chart-tooltip .tt-down { color: var(--red) !important; }
.chart-tooltip .tt-flat { color: var(--muted) !important; }

/* ---------- trade table ---------- */
.bt-trades-panel .panel-head { flex-wrap: wrap; }
.bt-table-wrap { overflow-x: auto; }
table.bt-trades {
  width: 100%;
  min-width: 920px;
  border-collapse: separate;
  border-spacing: 0;
}
table.bt-trades th {
  text-align: left;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--dim);
  padding: 9px 10px;
  border-bottom: 1px solid var(--line);
  background: rgba(13, 20, 31, 0.6);
  white-space: nowrap;
}
table.bt-trades td {
  padding: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
table.bt-trades tbody tr:hover { background: rgba(148, 163, 184, 0.05); }
table.bt-trades th:first-child,
table.bt-trades td:first-child { padding-left: 18px; }
table.bt-trades th:last-child,
table.bt-trades td:last-child { padding-right: 16px; }
.bt-num { color: var(--muted); text-align: right; }
th.bt-num { text-align: right; }
.bt-time { color: var(--muted); }
.bt-price { color: #d8e3f2; }
td.good { color: #4ade80; }
td.bad { color: var(--red); }
.bt-reason {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.03em;
  text-transform: capitalize;
}
.bt-reason.target { color: #86efac; background: rgba(34, 197, 94, 0.14); }
.bt-reason.stop { color: #fca5a5; background: rgba(239, 68, 68, 0.14); }
.bt-reason.time { color: #cbd5e1; background: rgba(148, 163, 184, 0.14); }
.bt-reason.end { color: #c4b5fd; background: rgba(167, 139, 250, 0.14); }
.bt-empty { padding: 46px 20px; text-align: center; color: var(--muted); }
.bt-empty[hidden] { display: none; }
.bt-empty .empty-icon { font-size: 34px; color: var(--dim); line-height: 1; }
.bt-empty h3 { margin: 10px 0 4px; font-size: 15px; color: var(--text); }
.bt-empty p { margin: 0; font-size: 12.5px; }

/* ---------- methodology ---------- */
.bt-rules {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px 22px;
  padding: 18px 20px 20px;
}
.bt-rules h3 { margin: 0 0 5px; font-size: 12px; font-weight: 650; color: var(--text); }
.bt-rules p { margin: 0; font-size: 12px; line-height: 1.55; color: var(--muted); }
.bt-rules b { color: #d8e3f2; font-weight: 600; }
.bt-disclaimer { margin: 0; text-align: center; font-size: 11.5px; color: var(--dim); }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .bt-rules { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 980px) {
  .bt-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  table.bt-trades { min-width: 780px; }
  table.bt-trades th:nth-child(4), table.bt-trades td:nth-child(4),
  table.bt-trades th:nth-child(5), table.bt-trades td:nth-child(5),
  table.bt-trades th:nth-child(11), table.bt-trades td:nth-child(11) { display: none; }
}
@media (max-width: 860px) {
  .bt-wrap { padding: 18px 14px 46px; }
  .bt-form { grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; }
  #btChart { height: 290px; }
  .bt-chart-wrap { margin: 14px 14px 8px; }
}
@media (max-width: 620px) {
  .bt-stats { gap: 10px; }
  .bt-stat { padding: 12px 13px 11px; }
  .bt-stat-value { font-size: 21px; }
  .bt-stat-note { font-size: 10px; }
  .bt-rules { grid-template-columns: 1fr; padding: 16px; }
  .bt-error, .bt-loading { flex-wrap: wrap; }
  .bt-error .btn { margin-left: 0; }
  table.bt-trades { min-width: 600px; }
  table.bt-trades th:nth-child(1), table.bt-trades td:nth-child(1),
  table.bt-trades th:nth-child(3), table.bt-trades td:nth-child(3),
  table.bt-trades th:nth-child(6), table.bt-trades td:nth-child(6) { display: none; }
  #btChart { height: 260px; }
  .bt-chart-wrap { margin: 12px 10px 8px; }
}
@media (max-width: 460px) {
  .bt-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bt-stats { grid-template-columns: 1fr 1fr; }
  .bt-actions .btn { flex: 1; min-width: 0; }
}