:root{--bg: #f8fafc;--surface: #ffffff;--border: #e2e8f0;--ink: #0f172a;--ink-soft: #475569;--ink-faint: #64748b;--brand: #2563eb;--brand-dark: #1d4ed8;--accent: #f59e0b;--good: #10b981;--radius: 12px;--shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 4px 12px rgba(15, 23, 42, .06);--maxw: 1080px;font-synthesis:none}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:16px;line-height:1.55}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}.site-header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.site-header .container{display:flex;align-items:center;justify-content:space-between;height:60px}.brand{font-weight:800;font-size:18px;color:var(--ink);letter-spacing:-.02em}.brand span{color:var(--brand)}.nav a{color:var(--ink-soft);font-weight:600;font-size:14px;margin-left:18px}.site-footer{border-top:1px solid var(--border);margin-top:64px;padding:32px 0;color:var(--ink-faint);font-size:14px}.site-footer a{color:var(--ink-soft)}.disclaimer-foot{max-width:720px}.hero{padding:28px 0 8px}.hero h1{font-size:clamp(26px,4vw,36px);line-height:1.15;margin:0 0 8px;letter-spacing:-.02em}.hero p.lede{color:var(--ink-soft);font-size:17px;margin:0;max-width:720px}.breadcrumbs{font-size:13px;color:var(--ink-faint);margin-bottom:10px}.breadcrumbs a{color:var(--ink-faint)}.calc-shell{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-top:16px}.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}@media(max-width:760px){.calc-grid{grid-template-columns:1fr;gap:16px}}.calc-inputs{display:grid;grid-template-columns:1fr 1fr;gap:14px 16px}@media(max-width:480px){.calc-inputs{grid-template-columns:1fr}}.field{display:flex;flex-direction:column;gap:4px}.field label{font-size:13px;font-weight:600;color:var(--ink-soft)}.field input[type=number],.field select{width:100%;padding:9px 10px;border:1px solid var(--border);border-radius:8px;font-size:15px;background:#fff;color:var(--ink)}.field input:focus,.field select:focus{outline:2px solid var(--brand);outline-offset:1px;border-color:var(--brand)}.input-affix{position:relative;display:flex;align-items:center}.input-affix .affix{position:absolute;color:var(--ink-faint);font-size:14px;pointer-events:none}.input-affix .affix-left{left:10px}.input-affix .affix-right{right:10px}.input-affix.has-left input{padding-left:22px}.input-affix.has-right input{padding-right:26px}.slider-row{display:flex;align-items:center;gap:10px}.slider-row input[type=range]{flex:1;accent-color:var(--brand)}.slider-row output{font-weight:600;font-size:14px;min-width:54px;text-align:right}.field .help{color:var(--ink-faint);font-size:12px}.field .err{color:#dc2626;font-size:12px}.field-error input,.field-error select{border-color:#dc2626}.calc-results{display:flex;flex-direction:column;gap:14px}.result-primary{background:linear-gradient(135deg,var(--brand) 0%,var(--brand-dark) 100%);color:#fff;border-radius:10px;padding:18px 20px}.result-primary .result-label{display:block;font-size:13px;opacity:.85;font-weight:600}.result-primary .result-value{display:block;font-size:clamp(28px,5vw,38px);font-weight:800;letter-spacing:-.02em}.result-list{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--border);border:1px solid var(--border);border-radius:10px;overflow:hidden;margin:0}.result-item{background:var(--surface);padding:10px 12px}.result-item dt{font-size:12px;color:var(--ink-faint)}.result-item dd{margin:2px 0 0;font-size:16px;font-weight:700}.calc-explain{margin:18px 0 0;padding:14px 16px;background:#f1f5f9;border-left:3px solid var(--brand);border-radius:0 8px 8px 0;color:var(--ink-soft)}.charts{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px}@media(max-width:760px){.charts{grid-template-columns:1fr}}.chart-card{margin:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}.chart-card figcaption h3{margin:0;font-size:15px}.chart-card .chart-desc{margin:2px 0 10px;font-size:13px;color:var(--ink-faint)}.chart-body{min-height:280px}.chart-table{margin-top:10px;font-size:13px}.chart-table summary{cursor:pointer;color:var(--brand);font-weight:600}.data-table{width:100%;border-collapse:collapse;margin-top:8px}.data-table th,.data-table td{text-align:right;padding:5px 8px;border-bottom:1px solid var(--border)}.data-table th[scope=row]{text-align:left;font-weight:600}.data-table thead th{color:var(--ink-faint);font-weight:600}.prose{max-width:760px}.prose h2{font-size:22px;margin:32px 0 10px;letter-spacing:-.01em}.prose p{color:var(--ink-soft)}.faq{margin-top:12px}.faq details{border:1px solid var(--border);border-radius:10px;background:var(--surface);padding:12px 16px;margin-bottom:10px}.faq summary{font-weight:700;cursor:pointer}.faq p{margin:8px 0 0}.related-grid,.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin-top:14px}.calc-card{display:block;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}.calc-card:hover{border-color:var(--brand);text-decoration:none}.calc-card h3{margin:0 0 6px;font-size:17px;color:var(--ink)}.calc-card p{margin:0;font-size:14px;color:var(--ink-faint)}.home-search{margin-top:8px}.home-search .search-label{display:block;font-size:14px;font-weight:600;color:var(--ink-soft);margin-bottom:6px}.home-search .search-input{width:100%;box-sizing:border-box;padding:12px 14px;font-size:16px;color:var(--ink);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.home-search .search-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px #4f46e526}.home-search .search-empty{margin-top:16px;color:var(--ink-faint);font-size:15px}.variant-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.variant-links a{background:#eef2ff;color:var(--brand-dark);padding:6px 12px;border-radius:999px;font-size:14px;font-weight:600}.ad-slot{background:repeating-linear-gradient(45deg,#f1f5f9,#f1f5f9 10px,#eef2f7 10px 20px);border:1px dashed var(--border);border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--ink-faint);font-size:12px;margin:20px 0}.ad-leaderboard{height:90px}.ad-rectangle{height:250px}.disclaimer{font-size:13px;color:var(--ink-faint);background:#fffbeb;border:1px solid #fde68a;border-radius:8px;padding:10px 14px;margin-top:24px}.embed-cta{margin-top:20px;padding:16px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}.embed-cta code{display:block;background:#0f172a;color:#e2e8f0;padding:10px 12px;border-radius:8px;font-size:12px;overflow-x:auto;margin-top:8px;white-space:pre}@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}