:root{--paper:#fbf5e9;--ink:#392d35;--plum:#60424f;--soft:#ece0d4;--line:#d8cbbf;--muted:#6d625f;--accent:#a74f29;--white:#fffefa;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;color-scheme:light}*{box-sizing:border-box}body{margin:0}a{color:var(--plum);text-underline-offset:4px}button,input,select,textarea{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.5;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #a74f29;outline-offset:4px}.wrap{width:min(1140px,calc(100% - 48px));margin:auto}.skip{position:absolute;top:-80px;left:20px;padding:14px;background:#fff;z-index:20}.skip:focus{top:15px}.header{display:flex;align-items:center;justify-content:space-between;gap:22px;padding:27px 0;border-bottom:1px solid var(--line)}.brand{font-size:25px;letter-spacing:-1px;font-weight:800;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:11px}.brand img{width:34px;height:34px}.header nav,.footer nav{display:flex;gap:22px;flex-wrap:wrap}.header nav a{font-size:13px;color:var(--ink);text-decoration:none;font-weight:650}.header nav a:hover{text-decoration:underline}.hero{display:grid;grid-template-columns:1.25fr .85fr;align-items:center;gap:70px;padding:59px 0 51px}.eyebrow{font-size:11px;letter-spacing:.15em;text-transform:uppercase;font-weight:750;color:var(--accent);margin:0 0 20px}.hero h1,.prose h1{font-family:Georgia,"Times New Roman",serif;font-size:clamp(43px,5.1vw,65px);font-weight:400;letter-spacing:-.045em;line-height:1.06;margin:0 0 23px}.hero h1 em{color:var(--plum);font-weight:400}.lead{font-size:17px;line-height:1.75;color:var(--muted);max-width:620px}.tags{display:flex;gap:11px;flex-wrap:wrap;margin-top:24px}.tags span{padding:7px 10px;border:1px solid var(--line);border-radius:30px;font-size:11px;background:#fffcf5}.hero-art{position:relative;border:1px solid var(--line);border-radius:50% 50% 12px 12px;background:#f2e7d8;padding:24px 28px 17px;transform:rotate(2deg)}.hero-art svg{display:block;width:100%;height:auto}.hero-art p{font:11px ui-monospace,monospace;text-align:center;color:var(--plum);margin:0 0 8px}.section-head{display:flex;justify-content:space-between;gap:24px;align-items:baseline;margin:0 0 17px}.section-head h2{font:400 28px Georgia,serif;letter-spacing:-.5px;margin:0}.section-head p{font:11px ui-monospace,monospace;letter-spacing:.04em;color:var(--muted);margin:0}.workspace{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:23px;align-items:start}.panel{padding:29px;background:var(--white);border:1px solid var(--line);border-radius:12px}.step-label{font-size:11px;text-transform:uppercase;letter-spacing:.1em;font-weight:800;color:var(--accent);margin:0 0 16px}.panel h3{font:400 25px Georgia,serif;letter-spacing:-.5px;line-height:1.15;margin:0 0 14px}.small{font-size:12px;line-height:1.75;color:var(--muted)}.unit-row{display:flex;justify-content:space-between;gap:20px;align-items:center;padding-bottom:19px;border-bottom:1px solid var(--line);margin-bottom:22px}.unit-row label{font-size:13px;font-weight:700}.unit-row select{width:130px}.field{display:block;margin:0 0 20px}.field>span{display:flex;justify-content:space-between;gap:14px;margin-bottom:9px;font-size:13px;font-weight:750}.field small{font-size:11px;font-weight:400;color:var(--muted)}input,select,textarea{width:100%;min-width:0;color:var(--ink);border:1px solid #ad9e96;background:#fff;border-radius:7px;padding:13px;min-height:46px}input{font-variant-numeric:tabular-nums}.field .hint{font-size:11px;color:var(--muted);line-height:1.65;margin:8px 0 0}.primary{min-height:48px;padding:14px 20px;color:white;border:1px solid var(--plum);background:var(--plum);border-radius:7px;font-size:14px;font-weight:750}.primary:hover{background:#48313c}.actions{display:flex;gap:20px;align-items:center;flex-wrap:wrap;margin-top:24px}.text-button{border:0;background:none;text-decoration:underline;color:var(--muted);font-size:12px;padding:10px 0}.error{font-size:13px;font-weight:650;line-height:1.6;color:#9f2521}.error:empty{display:none}.status{font-size:12px;line-height:1.6}.result{background:var(--plum);color:white}.result .eyebrow{color:#f5c49d;margin-bottom:18px}.big-value{font-size:clamp(30px,4vw,47px);font-weight:650;line-height:1.1;letter-spacing:-1.7px;margin:0 0 10px;overflow-wrap:anywhere}.result .small{color:#e5d7db}.result h3{font:600 14px ui-sans-serif,system-ui,sans-serif;color:#f4e8e0;margin-bottom:10px}.facts{border-top:1px solid #977c88;margin-top:25px;padding-top:4px}.fact{padding:16px 0;border-bottom:1px solid #977c88}.fact dt{font-size:11px;letter-spacing:.02em;color:#e9d6df}.fact dd{font-size:19px;margin:7px 0 0;line-height:1.4;overflow-wrap:anywhere}.exports{display:flex;gap:9px;flex-wrap:wrap;margin-top:24px}.secondary{padding:11px 13px;min-height:42px;border:1px solid #cdb7c1;background:transparent;border-radius:7px;font-size:12px;color:#fff;font-weight:650}.secondary:hover{background:#755866}.preview-panel{margin-top:22px;background:#fffefa;border:1px solid var(--line);border-radius:10px;padding:18px;color:var(--ink)}.preview-panel h4{font-size:12px;margin:0 0 15px}.preview svg{display:block;width:100%;height:auto;max-height:430px;object-fit:contain}.preview-panel .small{color:var(--muted);font-size:11px}.fallback{margin-top:18px}.fallback label{display:block;font-size:12px;margin-bottom:7px}.fallback textarea{min-height:220px;font:12px/1.6 ui-monospace,monospace}.empty-preview{background:#efe5d9;border:1px solid var(--line);padding:31px;border-radius:12px}.empty-preview h3{font:400 31px Georgia,serif;line-height:1.1;margin:0 0 18px;letter-spacing:-.6px}.empty-preview p{font-size:13px;line-height:1.8;color:var(--muted)}.diagram{background:#fffcf7;border:1px solid var(--line);border-radius:9px;padding:20px;margin-bottom:26px}.diagram svg{width:100%;height:auto;max-height:230px;display:block}.formula{font:12px/1.9 ui-monospace,monospace;padding:17px;background:#fffefa;border-radius:7px;overflow-wrap:anywhere}.limits-note{margin:23px 0 37px;max-width:900px;color:var(--muted);font-size:12px;line-height:1.8}.how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;border-top:1px solid var(--line);padding:34px 0 44px}.how-grid h3{font:400 22px Georgia,serif;letter-spacing:-.4px;margin:0 0 10px}.how-grid p{font-size:13px;line-height:1.8;color:var(--muted)}.footer{display:flex;justify-content:space-between;gap:20px;padding:27px 0 35px;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}.footer a{color:var(--muted)}.prose{max-width:780px;line-height:1.85;margin:60px auto 75px}.prose h1{font-size:clamp(39px,5vw,57px);max-width:740px}.prose h2{font:400 29px Georgia,serif;letter-spacing:-.5px;line-height:1.2;margin:35px 0 17px}.prose h3{font-size:18px;margin:25px 0 12px}.prose p,.prose li{font-size:14px;color:#594c50}.prose .lead{font-size:17px}.example{border-left:3px solid var(--plum);background:#efe4d9;padding:21px 24px;border-radius:0 9px 9px 0;margin:25px 0}.example p:first-child{margin-top:0}.example p:last-child{margin-bottom:0}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:13px;margin:24px 0}td,th{padding:12px 8px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}.noscript{padding:18px;background:#fff1d5;border:1px solid #d3ac6d;border-radius:8px;font-size:13px;margin-bottom:20px}[hidden]{display:none!important}.right-column:has(.result:not([hidden])) .empty-preview{display:none}
@media(max-width:850px){.hero{gap:35px;grid-template-columns:1.15fr .85fr;padding-block:45px}.hero h1{font-size:52px}.workspace{grid-template-columns:1fr 1fr;gap:17px}.panel{padding:23px}.big-value{font-size:36px}.hero-art{padding:15px}.section-head p{max-width:260px;text-align:right}.how-grid{gap:22px}}
@media(max-width:650px){.wrap{width:calc(100% - 32px)}.header{padding-block:20px;gap:13px}.brand{font-size:22px;gap:8px}.brand img{width:29px;height:29px}.header nav{gap:15px}.header nav a{font-size:11px}.header nav a:last-child{display:none}.hero{display:block;padding:37px 0}.hero-art{display:none}.hero h1{font-size:47px}.lead{font-size:16px}.tags{margin-top:20px}.tags span{font-size:10px}.section-head{display:block}.section-head h2{font-size:27px}.section-head p{max-width:none;text-align:left;margin-top:10px;font-size:10px}.workspace{grid-template-columns:1fr}.panel{padding:23px}.result{margin-top:3px}.empty-preview{padding:26px}.empty-preview h3{font-size:29px}.empty-preview .diagram{max-width:360px;margin-inline:auto}.how-grid{grid-template-columns:1fr;gap:13px;padding-block:29px}.how-grid p{margin-top:7px}.footer{display:block}.footer nav{margin-top:18px;gap:20px}.prose{margin-block:39px 55px}.prose h1{font-size:41px}.prose h2{font-size:26px}.prose .lead{font-size:16px}.example{padding:18px}.preview-panel{padding:13px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}