:root{color-scheme:light;--ink:#142235;--muted:#617187;--line:#dce3eb;--paper:#f5f7fa;--white:#fff;--blue:#245b83;--blue2:#eaf2f8;--teal:#137d78}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.6 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.sitebar{height:68px;padding:0 max(24px,calc((100% - 1160px)/2));display:flex;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid var(--line)}a{color:inherit;text-decoration:none}.brand{font-size:12px;font-weight:800;letter-spacing:.13em}.brand span{font-weight:500;color:var(--muted)}.back{font-size:13px;color:var(--blue);font-weight:650}.wrap{width:min(1120px,calc(100% - 40px));margin:auto}.hero{padding:62px 0 34px}.eyebrow{font-size:10px;letter-spacing:.17em;font-weight:800;color:var(--blue)}h1{font-size:clamp(36px,5.3vw,58px);line-height:1.06;letter-spacing:-.045em;margin:12px 0}h1 span{color:var(--blue);font-weight:500}.hero>p{max-width:680px;color:var(--muted);font-size:17px;margin:15px 0 23px}.formula{display:inline-flex;align-items:center;gap:9px;background:var(--blue2);border:1px solid #d6e4ef;border-radius:8px;padding:9px 14px;font-family:Georgia,serif;font-size:17px}.formula span{border-bottom:1px solid var(--blue);padding:0 5px}.workspace{display:grid;grid-template-columns:1.25fr .75fr;gap:18px;align-items:start}.panel{background:var(--white);border:1px solid var(--line);border-radius:13px;padding:25px;box-shadow:0 5px 22px #15283a08}.panel-head{display:flex;justify-content:space-between;align-items:start;margin-bottom:22px}.panel h2,.method h2{font-size:21px;letter-spacing:-.025em;margin:4px 0 0}.step{font-size:10px;letter-spacing:.1em;color:#8b98a8;font-weight:700}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px 17px}.field{display:grid;gap:6px;min-width:0}.field label{font-size:12px;color:#526276;font-weight:650}.field input,.field select{width:100%;height:43px;border:1px solid #cfd8e2;border-radius:7px;background:#fff;color:var(--ink);padding:0 11px;font:inherit;min-width:0}.field input:focus,.field select:focus{outline:2px solid #a9c6dc;outline-offset:1px}.unit-input{display:flex;align-items:center;border:1px solid #cfd8e2;border-radius:7px;overflow:hidden}.unit-input input{border:0;border-radius:0;outline:0}.unit-input span{padding:0 11px;color:var(--muted);font-size:12px;background:#f6f8fa;height:43px;display:flex;align-items:center;border-left:1px solid var(--line)}.actions{display:flex;gap:10px;margin-top:22px}button{border:0;border-radius:7px;padding:12px 16px;font:inherit;font-weight:700;cursor:pointer}.actions button:first-child{background:var(--blue);color:#fff;flex:1}.actions button:first-child span{float:right}.secondary{background:#f1f4f7;color:#31445a;border:1px solid var(--line)}button:disabled{opacity:.45;cursor:not-allowed}.hint,.disclaimer{font-size:12px;color:#758397}.hint{margin:15px 0 0}.result-state{min-height:145px;border:1px dashed #cbd7e2;border-radius:9px;background:#f8fafc;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:18px;color:var(--muted);font-size:13px}.result-number{font-size:43px;line-height:1.15;letter-spacing:-.05em;color:var(--teal);font-weight:750}.result-label{font-size:11px;color:#64758a;margin-top:5px}.details{margin:17px 0 0}.detail-row{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid #edf0f3;font-size:12px}.detail-row span{color:var(--muted)}.detail-row strong{text-align:right;font-variant-numeric:tabular-nums}.export{width:100%;margin-top:17px}.method{margin-top:18px}.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin:20px 0}.method-grid h3{font-size:13px;margin:0 0 5px}.method-grid p{font-size:12px;color:var(--muted);margin:0}.disclaimer{border-top:1px solid var(--line);padding-top:14px;margin:0}footer{padding:25px 0 40px;color:#8390a0;font-size:11px}.hidden{display:none!important}@media(max-width:760px){.workspace{grid-template-columns:1fr}.hero{padding-top:42px}.method-grid{grid-template-columns:1fr;gap:14px}.panel{padding:19px}.sitebar{padding:0 18px}.brand{font-size:10px}.brand span{display:none}}@media(max-width:420px){.field-grid{grid-template-columns:1fr}.actions{flex-direction:column}.formula{font-size:15px}}