:root {
  --green: #013220;
  --gold: #FFD700;
  --white: #FAF9F6;
  --charcoal: #333333;
  --soft-green: #2E8B57;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--white); color: var(--charcoal); font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, 'Helvetica Neue', Arial; }
.app-header { background: linear-gradient(135deg, var(--green), #02543c); color: var(--white); padding: 24px 16px; text-align: center; }
.brand { display: flex; align-items: center; justify-content: center; gap: 12px; }
.logo img { display:block; border-radius: 8px; }
.app-header h1 { margin: 0; font-size: 24px; letter-spacing: 0.5px; }
.tagline { margin: 6px 0 0; opacity: 0.9; }

h1 .mmc { font-weight: 900; letter-spacing: 1px; background: linear-gradient(135deg, var(--gold), #ffef9a); -webkit-background-clip: text; background-clip: text; color: transparent; }

main { max-width: 980px; margin: 24px auto; padding: 0 16px; }
.card { background: #fff; border: 1px solid #eee; border-radius: 16px; padding: 16px; margin-bottom: 16px; box-shadow: 0 4px 16px rgba(0,0,0,0.06); }
.card h2 { margin-top: 0; }
.card.subtle { background: #fafafa; }
.intro p { margin: 8px 0 0; }

.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.field label { font-weight: 600; }
.field input[type="number"], .field select { width: 100%; padding: 10px 12px; border: 1px solid #ddd; border-radius: 10px; font-size: 16px; }
.with-prefix { display: flex; align-items: center; gap: 6px; }
.with-prefix span { background: #f2f2f2; padding: 10px 12px; border-radius: 10px; border: 1px solid #e7e7e7; }

.split-row { display: grid; grid-template-columns: 1.2fr 1fr; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px dashed #eee; }
.split-row:last-child { border-bottom: 0; }
.split-row label { font-weight: 700; display: flex; gap: 10px; align-items: center; }
.split-row label small { font-weight: 400; opacity: 0.8; margin-left: 4px; }
.controls { display: grid; grid-template-columns: 1fr 80px 30px; gap: 8px; align-items: center; }
.controls input[type="range"] { width: 100%; }
.controls input[type="number"] { width: 100%; padding: 8px; border: 1px solid #ddd; border-radius: 8px; text-align: right; }
.unit { color: #777; }

.pill { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; border-radius: 50%; color: #fff; font-weight: 800; }
.pill-C { background: var(--green); }
.pill-A { background: var(--soft-green); }
.pill-S { background: #5a7; }
.pill-H { background: var(--gold); color: #000; }

.total-row { display: grid; grid-template-columns: 1fr 1fr 2fr; align-items: center; gap: 8px; padding-top: 10px; font-weight: 700; }
.total-row .hint { font-weight: 500; }
.hint.ok { color: #1a7f37; }
.hint.bad { color: #b3261e; }

.results-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.result { border: 1px solid #eee; padding: 12px; border-radius: 12px; background: #fff; }
.result .label { font-weight: 700; display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.dollars { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--green); }

.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.btn { padding: 10px 14px; border-radius: 10px; border: 1px solid #ddd; background: #fff; cursor: pointer; font-weight: 700; }
.btn:hover { background: #f6f6f6; }
.btn.primary { background: var(--gold); color: #000; border-color: #e0c000; }
.btn.primary:hover { filter: brightness(0.98); }

.assumption { margin-top: 10px; }

/* Lock switch */
.lock-row { display:flex; align-items:center; gap:10px; margin: 4px 0 10px; }
.switch { position: relative; display: inline-block; width: 48px; height: 26px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: #ccc; transition: .2s; border-radius: 999px; }
.slider:before { position: absolute; content: ""; height: 20px; width: 20px; left: 3px; bottom: 3px; background-color: white; transition: .2s; border-radius: 50%; }
.switch input:checked + .slider { background-color: var(--soft-green); }
.switch input:checked + .slider:before { transform: translateX(22px); }
.lock-label { font-weight: 600; }

/* Itemization panels */
.itemize { margin: 8px 0 16px; }
.btn.tiny { padding: 6px 10px; font-size: 13px; border-radius: 8px; }
.itemize-panel { margin-top: 10px; border: 1px solid #e8e8e8; border-radius: 12px; padding: 12px; background: #fff; box-shadow: 0 2px 8px rgba(0,0,0,0.04); }
.itemize-head { display:flex; gap:12px; flex-wrap:wrap; align-items:center; margin-bottom: 8px; }
.itemize-list .row { display:grid; grid-template-columns: 1fr 140px 40px; gap: 8px; align-items:center; margin-bottom: 8px; }
.itemize-list input[type="text"] { width: 100%; padding: 8px 10px; border: 1px solid #ddd; border-radius: 8px; }
.itemize-list input[type="number"] { width: 100%; padding: 8px 10px; border: 1px solid #ddd; border-radius: 8px; text-align: right; }
.itemize-actions { display:flex; gap:8px; }
.itemize .remove { border: 1px solid #f1c0c0; }
.itemize .remove:hover { background: #ffe9e9; }

/* Print styles */
.print-only { display: none; }
@media print {
  body { background: #fff; }
  header, .actions, .assumption, .form-grid, .split-row .controls, .total-row, .results-grid, .app-footer { display: none !important; }
  .print-only { display: block; padding: 16px; }
  .print-table { width: 100%; border-collapse: collapse; margin-top: 8px; }
  .print-table th, .print-table td { border: 1px solid #ddd; padding: 8px; text-align: left; }
  .print-table th { background: #f7f7f7; }
}

.app-footer { text-align: center; color: #666; padding: 20px; }
@media (prefers-color-scheme: dark) {
  html, body { background: #101418; color: #e8e8e8; }
  .card { background: #121a16; border-color: #1f2a24; }
  .card.subtle { background: #0c1210; }
  .result { background: #0f1713; border-color: #1f2a24; }
  .btn { background: #0f1713; color: #e8e8e8; border-color: #2a3a31; }
  .btn.primary { color: #101418; }
  .itemize-panel { background: #0f1713; border-color: #1f2a24; }
}