:root{--brand:#4B0082;--brand-dark:#35005c;--accent:#f7b267;--accent-soft:#fff1df;--ink:#171321;--muted:#625b70;--line:#e8e1ef;--page:#fcfbfd;--surface:#ffffff}*{box-sizing:border-box}html{max-width:100%}body{margin:0;color:var(--ink);background:var(--page);font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.6;max-width:100%;overflow-x:hidden}img,svg,canvas{max-width:100%;height:auto}a{color:var(--brand);text-underline-offset:0.18em}a:hover{color:var(--brand-dark)}.skip-link{position:absolute;left:-999px;z-index:1000;padding:0.5rem 0.75rem;color:#fff;background:var(--brand)}.skip-link:focus{top:1rem;left:1rem}.site-header{color:#fff;background:var(--brand)}.site-footer{color:#fff;background:#20142d}.site-footer a{color:#ffd7a5}.navbar-brand{font-weight:850}.brand-mark{display:inline-grid;width:36px;height:36px;color:var(--brand);background:var(--accent);border-radius:8px;font-weight:900;place-items:center}.page-hero{padding:0.7rem 0;background:linear-gradient(120deg,rgba(75,0,130,0.08),rgba(247,178,103,0.16));border-bottom:1px solid var(--line)}.page-hero .breadcrumb,.page-hero .section-label{display:none}.page-hero h1{margin-bottom:0.15rem !important;font-size:clamp(1.35rem,2.5vw,1.8rem);line-height:1.2}.page-hero .lead{margin-bottom:0 !important;font-size:0.98rem;line-height:1.35}.section-label{color:var(--brand);font-size:0.88rem;font-weight:850;text-transform:uppercase}.card-clean{background:var(--surface);border:1px solid var(--line);border-radius:8px;box-shadow:0 10px 28px rgba(23,19,33,0.06)}.calculator-workspace{display:grid;grid-template-columns:minmax(0,1fr);gap:1rem}@media (min-width:992px){.calculator-workspace{grid-template-columns:minmax(0,0.95fr) minmax(0,1.05fr);align-items:stretch}}.form-control,.form-select,.btn{border-radius:8px}.btn{min-height:48px}.form-control:focus,.form-select:focus{border-color:var(--brand);box-shadow:0 0 0 0.2rem rgba(75,0,130,0.14)}.btn-primary{background:var(--brand);border-color:var(--brand);font-weight:750}.btn-primary:hover,.btn-primary:focus{background:var(--brand-dark);border-color:var(--brand-dark)}.result-box{min-height:142px;padding:1rem;background:rgba(75,0,130,0.07);border:1px solid rgba(75,0,130,0.14);border-radius:8px}.main-result{color:var(--brand);font-size:clamp(1.65rem,4vw,2.35rem);font-weight:900;line-height:1.15}.breakdown-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:0.75rem;margin-top:1rem}@media (min-width:576px){.breakdown-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}.breakdown-item{padding:0.75rem;background:#fff;border:1px solid var(--line);border-radius:8px}.breakdown-item span{display:block;color:var(--muted);font-size:0.88rem}.breakdown-item strong{display:block;font-size:1.05rem}.chart-wrap{min-height:220px}.chart-wrap canvas{width:100%;height:220px;display:block}.insights-box{padding:1rem;background:var(--accent-soft);border:1px solid rgba(247,178,103,0.48);border-radius:8px}.insights-box ul{padding-left:1.2rem;margin-bottom:0}.insights-box li + li{margin-top:0.45rem}.text-muted-smart{color:var(--muted)}.formula-box{padding:0.9rem 1rem;color:var(--ink);background:rgba(75,0,130,0.06);border:1px solid rgba(75,0,130,0.12);border-radius:8px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:0.95rem;overflow-x:auto}.seo-links a{display:inline-block;margin-right:1rem;margin-bottom:0.5rem}@media (max-width:767.98px){.container,.container-fluid{overflow-x:clip}.calculator-workspace{grid-template-columns:minmax(0,1fr);gap:1rem}form .row{--bs-gutter-x:1rem;--bs-gutter-y:1rem}.form-control,.form-select,.btn,.input-group,.input-group>.form-control,.input-group>.form-select,.input-group>.btn{width:100%}.input-group{flex-wrap:wrap;gap:1rem}.input-group>.form-control,.input-group>.form-select,.input-group>.btn{flex:0 0 100%;border-radius:8px !important}.chart-wrap{min-height:200px}.chart-wrap canvas{height:200px}}