:root{--ink:#1f1f1f;--muted:#6b6b6b;--surface-muted:#f5f7fa;--border:#e5e7eb;color:var(--ink);background:var(--surface-muted);font-synthesis:none;letter-spacing:0;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Arial,Helvetica,sans-serif}*{box-sizing:border-box}body{min-width:320px;margin:0}button,input,select{letter-spacing:0}#root{min-height:100svh}.app-shell{background:var(--surface-muted);min-height:100svh}.app-header{color:#fff;background:#000;padding:22px 18px 36px}.header-inner{width:min(100%,1120px);margin:0 auto}.brand-row{align-items:center;gap:10px;margin-bottom:28px;display:flex}.brand-mark{background:#0070cc;border-radius:50%;width:28px;height:28px;box-shadow:inset 0 0 0 8px #000,0 0 0 2px #0070cc}.brand-name{color:#fff;font-size:15px;font-weight:700}.header-copy{max-width:720px}.eyebrow,.section-kicker{color:#0070cc;margin:0;font-size:13px;font-weight:700}.app-header .eyebrow{color:#53b1ff}.app-header h1{color:#fff;margin:10px 0 12px;font-size:34px;font-weight:300;line-height:1.18}.app-header h1 span{display:block}.app-header p{color:#ffffffc7;margin:0;font-size:15px;line-height:1.7}.app-main{padding:18px 14px 32px}.calculator-layout{gap:16px;width:min(100%,1120px);margin:-26px auto 0;display:grid}.panel,.disclaimer{border:1px solid var(--border);background:#fff;border-radius:16px;box-shadow:0 5px 9px #0000000f}.panel{padding:20px}.section-heading{margin-bottom:18px}.section-heading h2{color:var(--ink);margin:4px 0 0;font-size:24px;font-weight:300;line-height:1.25}.field{align-content:start;gap:7px;margin-bottom:16px;display:grid}.field-grid{align-items:start;gap:0;display:grid}label{color:var(--ink);font-size:14px;font-weight:700}input,select{box-sizing:border-box;width:100%;min-height:52px;color:var(--ink);font:inherit;background:#fff;border:1px solid #ccc;border-radius:8px;outline:none;padding:12px 14px;font-size:17px;transition:border-color .18s,box-shadow .18s}select{appearance:none;background-image:linear-gradient(45deg,#0000 50%,#1f1f1f 50%),linear-gradient(135deg,#1f1f1f 50%,#0000 50%);background-position:calc(100% - 18px) 22px,calc(100% - 12px) 22px;background-repeat:no-repeat;background-size:6px 6px,6px 6px;padding-right:38px}input:focus,select:focus{border-color:#0070cc;box-shadow:0 0 0 2px #0070cc}input[aria-invalid=true]{border-color:#c81b3a}input[aria-invalid=true]:focus{box-shadow:0 0 0 2px #c81b3a52}.field-hint,.field-error{margin:0;font-size:13px;line-height:1.45}.field-hint{color:var(--muted)}.field-error{color:#c81b3a;font-weight:600}.form-actions{flex-wrap:wrap;gap:10px;margin-top:6px;display:flex}button{cursor:pointer;min-height:46px;font:inherit;border:0;border-radius:999px;padding:0 18px;font-size:15px;font-weight:700;transition:background .18s,color .18s,box-shadow .18s,transform .18s}button:focus-visible{outline-offset:3px;outline:2px solid #0070cc}.secondary-button{color:#fff;background:#0070cc}.secondary-button:hover{background:#1eaedb;transform:scale(1.03);box-shadow:0 0 0 2px #0070cc}.ghost-button{color:#1f1f1f;background:#f5f7fa;border:1px solid #dedede}.ghost-button:hover{background:#fff;box-shadow:0 0 0 2px #0070cc33}.result-panel{align-content:start;display:grid}.safe-result{color:#fff;background:#000;border-radius:16px;padding:20px}.safe-result p,.safe-result span{color:#ffffffb8;margin:0;font-size:13px}.safe-result strong{color:#fff;margin:8px 0 4px;font-size:46px;font-weight:300;line-height:1.05;display:block}.warning-message,.empty-message{border-radius:8px;margin:14px 0 0;padding:12px 14px;font-size:14px;line-height:1.5}.warning-message{color:#aa2f00;background:#fff4ed}.empty-message{color:var(--muted);background:#f5f7fa}.result-list{gap:0;margin:18px 0 0;display:grid}.result-list div{border-bottom:1px solid #f3f3f3;justify-content:space-between;align-items:baseline;gap:14px;padding:13px 0;display:flex}.result-list dt{color:var(--muted);font-size:14px}.result-list dd{color:var(--ink);text-align:right;margin:0;font-size:16px;font-weight:700}.formula-box{background:#f5f7fa;border-radius:8px;margin-top:18px;padding:14px}.formula-box p{color:var(--ink);margin:0 0 6px;font-size:14px;font-weight:700}.formula-box span{color:var(--muted);font-size:13px;line-height:1.55;display:block}.disclaimer{box-sizing:border-box;width:min(100%,1120px);margin:16px auto 0;padding:16px}.disclaimer p{color:var(--muted);margin:0;font-size:12px;line-height:1.65}@media (width>=720px){.app-header{padding:28px 28px 54px}.app-header h1{font-size:46px}.app-main{padding:24px 24px 48px}.calculator-layout{margin-top:-38px}.panel{padding:28px}.field-grid{grid-template-columns:1fr 1fr;gap:14px}.safe-result strong{font-size:58px}}@media (width>=960px){.calculator-layout{grid-template-columns:minmax(0,1.05fr) minmax(360px,.95fr);align-items:start}.result-panel{position:sticky;top:20px}}