:root {
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #6b6b66;
  --color-text-tertiary: #9b9a93;
  --color-background-primary: #ffffff;
  --color-background-secondary: #f5f4ee;
  --color-border-tertiary: rgba(0, 0, 0, 0.10);
  --color-border-secondary: rgba(0, 0, 0, 0.20);
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans CN",
               "Noto Sans SC", sans-serif;
  --color-cf: #D85A30;
  --color-opt: #1D9E75;
  --color-patch2: #378ADD;
  --color-strat-b: #BA7517;
  --grid-stroke: rgba(127, 127, 127, 0.30);
  --bar-track: rgba(127, 127, 127, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-text-primary: #ebe9e3;
    --color-text-secondary: #a8a6a0;
    --color-text-tertiary: #7c7a74;
    --color-background-primary: #1a1a1a;
    --color-background-secondary: #262624;
    --color-border-tertiary: rgba(255, 255, 255, 0.08);
    --color-border-secondary: rgba(255, 255, 255, 0.18);
    --bar-track: rgba(255, 255, 255, 0.08);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-background-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 24px 48px;
}

@media (max-width: 600px) {
  .container { padding: 20px 16px 32px; }
}

.page-header { margin-bottom: 24px; padding-bottom: 16px; border-bottom: 0.5px solid var(--color-border-tertiary); }
.page-header h1 { font-size: 22px; font-weight: 500; margin: 0 0 6px; line-height: 1.4; }
.page-sub { font-size: 14px; color: var(--color-text-secondary); margin: 0; line-height: 1.55; }
.page-meta { font-size: 12px; color: var(--color-text-tertiary); margin: 8px 0 0; }

.summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 8px;
  margin: 0 0 24px;
}
.summary-card {
  padding: 14px 16px;
  background: var(--color-background-secondary);
  border-radius: var(--border-radius-md);
}
.summary-num { font-size: 20px; font-weight: 500; }
.summary-lbl { font-size: 12px; color: var(--color-text-secondary); margin-top: 2px; }

.tabs {
  display: flex;
  gap: 0;
  border-bottom: 0.5px solid var(--color-border-tertiary);
  margin-bottom: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}
.tab {
  padding: 12px 16px;
  cursor: pointer;
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 14px;
  font-family: inherit;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}
.tab:hover { color: var(--color-text-primary); }
.tab.active {
  color: var(--color-text-primary);
  border-bottom-color: var(--color-text-primary);
  font-weight: 500;
}

.panel { display: none; padding-top: 8px; }
.panel.active { display: block; }
.panel h2 { font-size: 18px; font-weight: 500; margin: 12px 0 6px; line-height: 1.4; }
.panel h3 {
  font-size: 12px; font-weight: 500;
  margin: 20px 0 10px;
  color: var(--color-text-secondary);
  letter-spacing: 0.5px; text-transform: uppercase;
}
.panel-sub { font-size: 13px; color: var(--color-text-secondary); margin: 0; line-height: 1.6; }
.panel-sub.note { margin-top: 8px; }

.chart {
  display: block;
  width: 100%;
  height: auto;
  margin: 14px 0 8px;
}
.chart-grid { stroke: var(--grid-stroke); stroke-width: 0.5; stroke-dasharray: 2 3; }
.chart-axis { font-size: 11px; fill: var(--color-text-secondary); }
.chart-anno { font-size: 10px; fill: var(--color-text-secondary); }
.chart-patch-label { font-size: 12px; font-weight: 500; }
.chart-patch-muted { fill: var(--color-text-secondary); }
.chart-line { stroke: var(--color-text-primary); }

.step-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 8px;
  margin: 8px 0;
}
.step {
  padding: 12px 14px;
  background: var(--color-background-secondary);
  border-left: 3px solid;
  border-radius: 0;
}
.step-cf { border-left-color: var(--color-cf); }
.step-opt { border-left-color: var(--color-opt); }
.step-label {
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.4px; text-transform: uppercase;
  margin-bottom: 6px;
}
.step-cf .step-label { color: var(--color-cf); }
.step-opt .step-label { color: var(--color-opt); }
.step-title { font-size: 14px; font-weight: 500; margin-bottom: 4px; line-height: 1.4; }
.step-desc { font-size: 12px; color: var(--color-text-secondary); line-height: 1.6; }

.sizebar-wrap { display: flex; align-items: center; gap: 10px; margin: 6px 0; }
.sizebar-label { width: 96px; flex-shrink: 0; color: var(--color-text-secondary); font-size: 12px; }
.sizebar {
  height: 28px; border-radius: 4px;
  display: flex; align-items: center; padding: 0 10px;
  color: white; font-weight: 500; font-size: 12px; min-width: 70px;
}

.evidence {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 8px;
}
.evidence-cf, .evidence-opt {
  padding: 12px 14px;
  background: var(--color-background-secondary);
  border-left: 3px solid;
  border-radius: 0;
}
.evidence-cf { border-left-color: var(--color-cf); }
.evidence-opt { border-left-color: var(--color-patch2); }
.ev-title { font-size: 12px; color: var(--color-text-secondary); margin-bottom: 4px; }
.ev-body { font-size: 13px; line-height: 1.6; }
.ev-strong-cf { color: var(--color-cf); font-weight: 500; }
.ev-strong-opt { color: var(--color-patch2); font-weight: 500; }
.ev-muted { color: var(--color-text-secondary); }

.pnl {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
  margin-top: 8px;
}
.pnl-cell {
  padding: 12px 14px;
  border-radius: var(--border-radius-md);
  background: var(--color-background-secondary);
}
.pnl-amt { font-size: 18px; font-weight: 500; }
.pnl-amt.loss { color: var(--color-cf); }
.pnl-amt.profit { color: var(--color-opt); }
.pnl-amt.net { color: var(--color-text-primary); }
.pnl-lbl { font-size: 11px; color: var(--color-text-secondary); margin-top: 2px; }

.callout {
  margin-top: 16px;
  padding: 14px 16px;
  background: var(--color-background-secondary);
  border-left: 3px solid var(--color-strat-b);
  border-radius: 0;
}
.callout-title { font-size: 14px; font-weight: 500; color: var(--color-strat-b); margin-bottom: 6px; }
.callout-body { font-size: 13px; line-height: 1.65; }
.callout ul {
  margin: 8px 0 0;
  padding-left: 18px;
  font-size: 12px; line-height: 1.75;
  color: var(--color-text-secondary);
}

.day-chart { margin: 14px 0; }
.day-row {
  display: grid;
  grid-template-columns: 88px 1fr 96px 130px;
  gap: 10px; align-items: center;
  padding: 5px 6px;
  cursor: pointer; border-radius: 4px;
  font-size: 12px;
  transition: background 0.12s;
}
.day-row:hover, .day-row.selected { background: var(--color-background-secondary); }
.day-date { color: var(--color-text-secondary); font-variant-numeric: tabular-nums; }
.day-bar-wrap { background: var(--bar-track); height: 18px; border-radius: 3px; overflow: hidden; }
.day-bar { height: 100%; border-radius: 3px; transition: width 0.4s ease-out; }
.day-amt { text-align: right; font-variant-numeric: tabular-nums; font-weight: 500; }
.day-strat { font-size: 11px; color: var(--color-text-secondary); }

@media (max-width: 540px) {
  .day-row {
    grid-template-columns: 80px 1fr 90px;
    grid-template-rows: auto auto;
  }
  .day-strat { grid-column: 1 / -1; padding-left: 0; }
}

.detail {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: var(--border-radius-md);
  background: var(--color-background-secondary);
}
.detail[hidden] { display: none; }
.detail-title { font-size: 14px; font-weight: 500; margin-bottom: 4px; }
.detail-meta { font-size: 12px; color: var(--color-text-secondary); margin-bottom: 8px; }
.detail-body { font-size: 13px; line-height: 1.65; }

.legend {
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: var(--border-radius-md);
  background: var(--color-background-secondary);
  display: flex; gap: 18px;
  font-size: 12px;
  flex-wrap: wrap;
}
.legend-dot {
  display: inline-block;
  width: 12px; height: 12px;
  border-radius: 2px;
  margin-right: 6px;
  vertical-align: middle;
}

.page-footer {
  margin-top: 40px;
  padding-top: 16px;
  border-top: 0.5px solid var(--color-border-tertiary);
  font-size: 12px;
  color: var(--color-text-tertiary);
  line-height: 1.7;
}
.page-footer p { margin: 4px 0; }
.page-footer a {
  color: var(--color-text-secondary);
  text-decoration: underline;
  text-decoration-color: var(--color-border-tertiary);
  text-underline-offset: 2px;
}
.page-footer a:hover { color: var(--color-text-primary); }