html{min-width:320px;min-height:100%}#root{min-height:100vh}*{box-sizing:border-box}:root{color:#1f2937;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#f3f4f6;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}body{min-width:320px;min-height:100vh;margin:0}button,input{font:inherit}main{width:min(100% - 32px,680px);margin:0 auto;padding:56px 0 40px}.page-header{text-align:center;margin-bottom:32px}.eyebrow{letter-spacing:.12em;color:#6b7280;margin:0 0 10px;font-size:.78rem;font-weight:800}h1{color:#111827;letter-spacing:-.04em;margin:0;font-size:clamp(2rem,6vw,3rem);line-height:1.08}.subtitle{color:#6b7280;max-width:600px;margin:16px auto 0;font-size:1.05rem;line-height:1.6}.calculator{background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:28px;box-shadow:0 10px 30px #0f172a14}label{color:#111827;margin-bottom:8px;font-size:.98rem;font-weight:750;display:block}.label-help{color:#6b7280;margin-top:3px;font-size:.82rem;font-weight:400;display:block}.input-wrapper{align-items:center;margin-bottom:22px;display:flex;position:relative}.input-wrapper input{color:#111827;background:#fff;border:2px solid #d1d5db;border-radius:10px;outline:none;width:100%;min-height:54px;padding:12px 48px 12px 16px;font-size:1.15rem;font-weight:600;transition:border-color .15s,box-shadow .15s}.input-wrapper:first-of-type input{padding-left:38px}.input-wrapper input:focus{border-color:#2563eb;box-shadow:0 0 0 3px #2563eb1f}.input-prefix,.input-suffix{z-index:1;color:#6b7280;pointer-events:none;font-weight:700;position:absolute}.input-prefix{left:16px}.input-suffix{right:16px}button{color:#fff;cursor:pointer;background:#1f2937;border:0;border-radius:10px;width:100%;min-height:54px;margin-top:2px;padding:12px 20px;font-size:1.05rem;font-weight:800;transition:background .15s,transform .1s}button:hover{background:#111827}button:active{transform:translateY(1px)}button:focus-visible{outline-offset:3px;outline:3px solid #2563eb59}.results{color:#fff;text-align:center;background:#111827;border-radius:16px;margin-top:20px;padding:28px;box-shadow:0 10px 30px #0f172a1f}.results-label{color:#9ca3af;letter-spacing:.12em;margin:0;font-size:.78rem;font-weight:800}.selling-price{letter-spacing:-.04em;margin:8px 0 24px;font-size:clamp(2.4rem,9vw,4rem);font-weight:850;line-height:1}.result-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.result-item{background:#1f2937;border:1px solid #374151;border-radius:10px;padding:16px}.result-item span{color:#9ca3af;margin-bottom:6px;font-size:.82rem;display:block}.result-item strong{font-size:1.2rem;display:block}.explanation{background:#fff;border:1px solid #e5e7eb;border-radius:16px;margin-top:24px;padding:28px}.explanation h2{color:#111827;margin:0 0 12px;font-size:1.25rem;line-height:1.3}.explanation p{color:#4b5563;margin:0 0 20px;line-height:1.6}.formula{color:#4b5563;border-top:1px solid #f3f4f6;padding:10px 0;font-size:.92rem}.formula strong{color:#111827}footer{text-align:center;padding:24px 8px 0}footer p{color:#9ca3af;margin:0;font-size:.82rem;line-height:1.5}@media (width<=480px){main{width:min(100% - 24px,680px);padding:36px 0 28px}.page-header{margin-bottom:24px}.subtitle{font-size:.96rem}.calculator,.results,.explanation{border-radius:14px;padding:22px}.result-grid{grid-template-columns:1fr}.selling-price{margin-bottom:20px}}