:root {
  /* Core Brand */
  --brand-primary: #5C4BFF;
  --brand-secondary: #E5E0FF;

  /* Base Neutrals */
  --base-1: #FFFFFF; /* background */
  --base-2: #F9FAFB; /* cards */
  --base-3: #E5E7EB; /* subtle bg / disabled */
  --base-4: #D1D5DB; /* borders */

  /* Text */
  --text-primary: #111827;
  --text-secondary: #4B5563;
  --text-tertiary: #9CA3AF;
  --text-link: #2563EB;
  --text-white: #FFFFFF;

  /* Status */
  --success-fg: #30A67B;
  --success-bg: #D1FAE5;
  --error-fg: #DC2626;
  --error-bg: #FECACA;
  --warning-fg: #F59E0B;

  /* Specials */
  --wc-blue: #4084ED;
  --connect-blue: #3B82F6;
  --tooltip-bg: #111827;
  --tooltip-text: #F9FAFB;
  --unknown-warning: #F4D09A;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--base-1);
  color: var(--text-primary);
}

.container { max-width: 1180px; margin: 0 auto; padding: 24px; }

.site-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 24px; border-bottom: 1px solid var(--base-4);
  background: var(--base-1); position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 28px; height: 28px; border-radius: 6px; background: var(--brand-primary); box-shadow: 0 0 0 4px var(--brand-secondary) inset; }
.brand-title { font-weight: 700; letter-spacing: 0.2px; color: var(--text-primary); }
.brand-subtitle { color: var(--text-tertiary); font-size: 12px; margin-left: 6px; }

.hero { margin: 28px 0 16px; }
.hero-head { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px; }
.page-title { margin: 0 0 8px; font-size: 28px; color: var(--text-primary); }
.page-subtitle { margin: 0; color: var(--text-secondary); }
.page-subtitle .doc-link, .panel-subtitle .doc-link { color: var(--text-link); text-decoration: none; border-bottom: 1px solid rgba(37,99,235,0.35); }
.page-subtitle .doc-link:hover, .panel-subtitle .doc-link:hover { opacity: 0.85; }

.panel { background: var(--base-2); border: 1px solid var(--base-4); border-radius: 12px; padding: 18px; margin: 18px 0 24px; }
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.panel h2 { margin: 0; font-size: 18px; color: var(--text-primary); }
.panel-subtitle { margin: 8px 0 0; color: var(--text-secondary); font-size: 13px; }

.range-toggle { display: inline-flex; border: 1px solid var(--base-4); border-radius: 8px; overflow: hidden; background: var(--base-2); }
.range-btn { background: transparent; color: var(--text-primary); border: 0; padding: 8px 12px; cursor: pointer; font-size: 13px; }
.range-btn.active { background: var(--brand-secondary); color: var(--brand-primary); }

.metrics-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 14px; }
.metric-card { background: var(--base-1); border: 1px solid var(--base-4); border-radius: 10px; padding: 14px; }
.metric-title { color: var(--text-secondary); font-size: 12px; display: flex; align-items: center; gap: 6px; }
.metric-value { font-size: 22px; margin-top: 6px; font-weight: 700; letter-spacing: 0.2px; color: var(--text-primary); }
.metric-sub { font-size: 12px; color: var(--text-tertiary); margin-top: 4px; }
.metric-note { font-size: 12px; color: var(--text-secondary); margin-top: 8px; line-height: 1.4; }
.info { display: inline-flex; align-items: center; justify-content: center; width: 16px; height: 16px; border-radius: 50%; border: 1px solid var(--base-4); color: var(--text-tertiary); font-size: 10px; }

.chart-block { margin-top: 16px; }
.chart-head { display: flex; align-items: center; justify-content: space-between; }
.chart-head h3 { margin: 0; font-size: 14px; color: var(--text-primary); }
.legend { display: inline-flex; gap: 12px; color: var(--text-secondary); font-size: 12px; }
.legend-in::before, .legend-out::before { content: ""; display: inline-block; width: 8px; height: 8px; border-radius: 2px; margin-right: 6px; }
.legend-in::before { background: var(--success-fg); }
.legend-out::before { background: var(--error-fg); }
.chart-frame { border: 1px dashed var(--base-4); border-radius: 10px; padding: 8px; background: var(--base-1); }
.explain { color: var(--text-secondary); font-size: 12px; margin-top: 8px; }
canvas { width: 100%; display: block; border-radius: 8px; background: var(--base-1); }

.site-footer { margin: 24px 0; color: var(--text-tertiary); font-size: 12px; text-align: center; }
.last-updated { color: var(--text-tertiary); font-size: 12px; }

@media (max-width: 980px) {
  .metrics-grid { grid-template-columns: 1fr; }
  .hero-head { grid-template-columns: 1fr; gap: 8px; }
}
@media (max-width: 560px) {
  .range-btn { padding: 6px 10px; }
} 

/* Yield layout */
.yield-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 12px;
}
.yield-grid .metric-card { height: 100%; }
.yield-grid .metric-card .metric-title { margin-bottom: 0; }
.yield-grid .metric-card .metric-value { margin-top: 6px; }
.yield-grid .chart-block { margin-top: 0; }
.yield-grid .span-2 { grid-column: 1 / -1; }

@media (max-width: 980px) {
  .yield-grid { grid-template-columns: 1fr; }
}