/* 持仓回测 · Apollo OS 深色主题 */
:root {
  --bt-bg: #0f1117;
  --bt-surface: #1a1c29;
  --bt-card: #1e2030;
  --bt-border: #2a2d42;
  --bt-text: #e2e8f0;
  --bt-muted: #7c809b;
  --bt-accent: #6366f1;
  --bt-up: #22c55e;
  --bt-down: #f43f5e;
  --font: "DM Sans", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  background: var(--bt-bg);
  color: var(--bt-text);
}

.bt-header {
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: var(--bt-surface);
  border-bottom: 1px solid var(--bt-border);
}

.bt-brand {
  font-weight: 700;
  font-size: 16px;
  text-decoration: none;
  color: var(--bt-text);
}

.bt-header-links {
  display: flex;
  gap: 16px;
  font-size: 14px;
}

.bt-header-links a {
  color: var(--bt-accent);
  font-weight: 600;
  text-decoration: none;
}

.bt-main {
  max-width: 960px;
  margin: 0 auto;
  padding: 28px 20px 48px;
}

.bt-title {
  margin: 0 0 8px;
  font-size: 24px;
  font-weight: 700;
}

.bt-lead {
  margin: 0 0 28px;
  color: var(--bt-muted);
  font-size: 14px;
  line-height: 1.6;
}

.bt-steps {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
}

.bt-step-tab {
  flex: 1;
  padding: 12px;
  border: 1px solid var(--bt-border);
  border-radius: 10px;
  background: var(--bt-surface);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--bt-muted);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.bt-step-tab.is-active {
  border-color: var(--bt-accent);
  color: var(--bt-accent);
  background: rgba(99, 102, 241, 0.06);
}

.bt-panel {
  display: none;
  border-radius: 12px;
  background: var(--bt-surface);
  border: 1px solid var(--bt-border);
  padding: 22px 24px;
  margin-bottom: 20px;
}

.bt-panel.is-active {
  display: block;
}

.bt-field {
  margin-bottom: 16px;
}

.bt-field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
}

.bt-field input,
.bt-field select,
.bt-field textarea {
  width: 100%;
  max-width: 400px;
  padding: 10px 12px;
  border: 1px solid var(--bt-border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 14px;
  background: rgba(0, 0, 0, 0.2);
  color: var(--bt-text);
}

.bt-field textarea {
  min-height: 100px;
  max-width: 100%;
  resize: vertical;
}

.bt-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.bt-btn {
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid var(--bt-border);
  background: var(--bt-surface);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  color: var(--bt-text);
}

.bt-btn-primary {
  background: var(--bt-accent);
  border-color: var(--bt-accent);
  color: #fff;
}

.bt-btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.bt-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.bt-metric {
  padding: 14px;
  border-radius: 10px;
  background: var(--bt-card);
  border: 1px solid var(--bt-border);
}

.bt-metric-label {
  font-size: 11px;
  color: var(--bt-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.bt-metric-value {
  font-size: 22px;
  font-weight: 700;
  margin-top: 4px;
}

.bt-metric-value.is-pos {
  color: var(--bt-up);
}

.bt-metric-value.is-neg {
  color: var(--bt-down);
}

.bt-chart-wrap {
  width: 100%;
  height: 300px;
  border-radius: 10px;
  background: var(--bt-card);
  border: 1px solid var(--bt-border);
  margin-bottom: 16px;
  overflow: hidden;
}

.bt-error {
  padding: 16px;
  background: rgba(244, 63, 94, 0.08);
  border: 1px solid rgba(244, 63, 94, 0.3);
  border-radius: 8px;
  color: var(--bt-down);
  font-size: 13px;
  margin-bottom: 12px;
}

.bt-holdings-list {
  margin: 12px 0;
}

.bt-holding {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px 4px 8px;
  margin: 4px 6px 4px 0;
  border-radius: 20px;
  background: var(--bt-card);
  border: 1px solid var(--bt-border);
  font-size: 12px;
}

@media (max-width: 640px) {
  .bt-steps {
    flex-direction: column;
  }
}

.tv-lightweight-charts a[href*="tradingview.com"] {
  display: none !important;
  pointer-events: none !important;
}