:root { --fg:#111; --bg:#fff; --muted:#6b7280; --brand:#2563eb; --ok:#16a34a; --warn:#b45309; --bad:#dc2626; --card:#f8fafc; }

* { box-sizing: border-box; font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif; }
body { margin: 0; padding: 24px; color: var(--fg); background: var(--bg); }
h1 { margin: 0 0 8px 0; font-size: 28px; }
p.help { color: var(--muted); margin: 0 0 20px 0; }

/* layout */
.grid { display: grid; gap: 16px; grid-template-columns: repeat(12, 1fr); }
.card { background: var(--card); border: 1px solid #e5e7eb; border-radius: 12px; padding: 16px; }
.span-4 { grid-column: span 4; min-width: 260px; }
.span-8 { grid-column: span 8; min-width: 300px; }
.mt-16 { margin-top: 16px; }
.mt-20 { margin-top: 20px; }
.h3-tight { margin-top: 0; }
.rule { border: none; border-top: 1px solid #e5e7eb; margin: 12px 0; }

/* form */
label { display: block; font-weight: 600; margin-bottom: 6px; }
.row { display: grid; grid-template-columns: 1fr 140px; gap: 10px; align-items: center; margin-bottom: 12px; } /* unchanged column widths */
input[type="number"], input[type="text"] { width: 100%; padding: 10px; border: 1px solid #e5e7eb; border-radius: 8px; }
.suffix { color: var(--muted); font-size: 14px; }
.actions { display: flex; gap: 10px; margin-top: 8px; }
button { padding: 10px 14px; border-radius: 10px; border: 0; cursor: pointer; font-weight: 600; }
.primary { background: var(--brand); color: #fff; }
.ghost { background: #eef2ff; color: #1e3a8a; }

/* KPI grid */
.kpi { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
.kpi .item { background:#fff; border:1px solid #e5e7eb; border-radius:12px; padding:14px; }
.kpi .item h3 { margin:0; font-size:14px; color:var(--muted); }
.kpi .item .val { font-size:22px; font-weight:700; margin-top:6px; }

.note { font-size: 13px; color: var(--muted); margin-top: 8px; }
.good { color: var(--ok); }
.warn { color: var(--warn); }
.bad { color: var(--bad); }

/* chart */
.chartWrap { margin-top:16px; background:#fff; border:1px solid #e5e7eb; border-radius:12px; padding:14px; }
.chartHeader { display:flex; justify-content:space-between; align-items:center; margin-bottom:8px; }
.legend { display:flex; gap:16px; align-items:center; font-size:14px; color:var(--muted); }
.swatch { width:14px; height:14px; border-radius:3px; display:inline-block; margin-right:6px; background: var(--brand); }
.swatch.retire { background:#10b981; }
svg.chart { width:100%; height:320px; display:block; }

/* details help boxes */
details.helpbox { margin-top:14px; background:#fff; border:1px solid #e5e7eb; border-radius:12px; padding:14px; }
details.helpbox > summary { cursor:pointer; list-style:none; font-weight:700; position:relative; padding-right:22px; }
details.helpbox > summary::-webkit-details-marker { display:none; }
details.helpbox > summary::after { content:"▾"; position:absolute; right:0; top:0; line-height:1; transform:translateY(2px) rotate(0deg); transition:transform .2s ease; color:var(--muted); }
details.helpbox[open] > summary::after { transform:translateY(2px) rotate(180deg); }
details.helpbox[open] summary { margin-bottom:8px; }

.helpgrid { display:grid; gap:10px; grid-template-columns: repeat(2, minmax(220px, 1fr)); }
.helpgrid div { background:#f9fafb; border:1px solid #eef2f7; border-radius:10px; padding:10px; }
.helpgrid b { display:block; margin-bottom:4px; }

/* disclaimer card variant */
.card.disclaimer { background:#f1f5f9; border:1px solid #e5e7eb; border-radius:12px; padding:14px; }
.disclaimer p { font-size:13px; color:#374151; margin:0; }
.disclaimer p + p { color:#6b7280; margin-top:10px; }

/* responsive */
@media (max-width:1100px){
  .span-4,.span-8{grid-column: span 12}
  .kpi{grid-template-columns: repeat(2,minmax(160px,1fr))}
  .helpgrid{grid-template-columns:1fr}
}
@media (max-width:600px){ .kpi{grid-template-columns:1fr} }

/* print */
@media print {
  @page { margin: 16mm; }
  body { padding: 0; background:#fff; }
  body * { visibility: hidden !important; }
  #resultsSection, #resultsSection * { visibility: visible !important; }
  #resultsSection { position: absolute; left: 0; top: 0; width: 100%; padding: 0; background: #fff; border: 0; box-shadow: none; }
  #printPage1 { break-after: page; page-break-after: always; margin-bottom: 8mm; }
  #pdfBtn { display: none !important; }
  .kpi, .chartWrap, .kpi .item, #needSaveCard, #aboutInputs, #aboutMarker, #disclaimerCard { break-inside: avoid; page-break-inside: avoid; }
  #resultsSection .card, .chartWrap, .kpi .item, details.helpbox { border-color:#d1d5db; }
  #resultsSection h2 { font-size: 20px; margin: 0 0 8px 0; }
}