@font-face{font-family:IBM Plex Sans;font-style:normal;font-weight:600;font-display:swap;src:url(/fonts/ibm-plex-sans-cyrillic-600-normal.woff2)format("woff2");unicode-range:U+400-45F,U+490-491,U+4B0-4B1,U+2116}.brand-wordmark{font-family:IBM Plex Sans,sans-serif}.brand-mark .brand-ring{stroke:var(--graphite,#202628)}.brand-mark .brand-focus-point{fill:var(--copper-600,#9a633b)}.wordmark.brand-lockup{align-items:center;gap:12px;display:inline-flex}.brand-wordmark strong{color:var(--graphite,#202628);font-weight:600}
:root{--ink:#222a2d;--muted:#626d72;--line:#d9dfe1;--paper:#fff;--wash:#f5f7f6;--accent:#1d5157;--gold:#827451;--serif:Georgia, "Times New Roman", serif;--sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif}*{box-sizing:border-box}body{color:var(--ink);background:var(--paper);font-family:var(--sans);margin:0;font-size:16px;line-height:1.65}a{color:var(--accent);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}button,input,select,textarea{font:inherit}button,a,input,select,textarea,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline-offset:3px;outline:3px solid #b38c3f}h1,h2,h3,p{margin:0 0 16px}h1,h2,h3{line-height:1.22}h1,h2{font-family:var(--serif);font-weight:400}h1{letter-spacing:-1px;font-size:42px}h2{font-size:27px}h3{font-size:16px;font-weight:600}ul{padding-left:22px}li{margin-bottom:12px}.container{max-width:1060px;margin:0 auto;padding:0 32px}.site-header{border-bottom:1px solid var(--line)}.header-inner{justify-content:space-between;align-items:center;gap:24px;max-width:1200px;margin:auto;padding:24px 32px;display:flex}.wordmark{font-family:var(--serif);color:var(--ink);white-space:nowrap;font-size:21px;text-decoration:none}.wordmark strong{color:var(--accent);font-weight:400}nav{gap:26px;font-size:14px;display:flex}nav a{color:var(--ink);padding:8px 0;text-decoration:none}.skip-link{z-index:10;background:#fff;padding:10px;position:absolute;top:-100px;left:16px}.skip-link:focus{top:8px}.page-heading{padding:34px 0 24px}.eyebrow{letter-spacing:1.3px;text-transform:uppercase;color:var(--gold);margin-bottom:12px;font-size:12px;font-weight:600}.eyebrow a{color:inherit;text-decoration:none}.lead{color:var(--muted);max-width:740px;margin-bottom:0;font-size:18px;line-height:1.65}.home-heading{padding:55px 0 38px}.home-heading h1{margin-bottom:22px;font-size:54px}.tool-directory{border-top:1px solid var(--line);margin-bottom:36px}.directory-row{border-bottom:1px solid var(--line);color:var(--ink);grid-template-columns:50px 1fr 30px;gap:24px;padding:28px 0;text-decoration:none;display:grid}.directory-row:hover{background:var(--wash)}.row-number{font-family:var(--serif);color:var(--gold);font-size:20px}.directory-row h2{margin-bottom:8px}.directory-row p{color:var(--muted);max-width:640px;margin:0;font-size:15px}.directory-row .eyebrow{margin-bottom:6px;font-size:10px;display:block}.row-arrow{color:var(--accent);align-self:center;font-size:25px}.reference-columns{grid-template-columns:1fr 1fr;gap:40px;margin:34px 0;display:grid}.reference-columns p{color:var(--muted);font-size:15px}.reference-card{border:1px solid var(--line);padding:26px}.tool{border:1px solid var(--line);background:var(--wash);margin-bottom:38px;padding:24px}.tool-grid{grid-template-columns:1.16fr 1fr;gap:30px;display:grid}.tool label{margin-bottom:8px;font-size:14px;font-weight:600;display:block}.tool input:not([type=checkbox]),.tool select,.tool textarea{width:100%;min-height:46px;color:var(--ink);background:#fff;border:1px solid #aebabc;border-radius:3px;padding:9px 12px;display:block}.tool textarea{resize:vertical}.numeral-input{font-family:var(--serif);letter-spacing:3px;font-size:30px;line-height:1.4}.hint{color:var(--muted);margin:10px 0 16px;font-size:13px;line-height:1.55}.symbol-keyboard{grid-template-columns:repeat(9,1fr);gap:5px;display:grid}.symbol{min-height:54px;color:var(--ink);background:#fff;border:1px solid #c9d1d2;border-radius:3px;flex-direction:column;justify-content:center;align-items:center;padding:3px 0;display:flex}.symbol:hover{border-color:var(--accent);background:#e9f0ef}.symbol span{font-size:24px;font-family:var(--serif);line-height:1.1}.symbol small{color:var(--muted);font-size:9px}.keyboard-actions{justify-content:space-between;gap:8px;margin-top:8px;display:flex}.quiet{text-underline-offset:4px;color:var(--accent);background:0 0;border:0;min-height:44px;padding:8px;font-size:13px;text-decoration:underline}.primary{background:var(--accent);color:#fff;border:0;border-radius:3px;min-height:46px;padding:11px 20px;font-size:14px;font-weight:600}.primary:hover{background:#153e42}.context-panel>select{margin-bottom:16px}.check{align-items:flex-start;gap:9px;line-height:1.5;margin:14px 0!important;font-weight:400!important;display:flex!important}.check input{width:18px;height:18px;accent-color:var(--accent);flex-shrink:0;margin:2px 0 0}.advanced{margin:10px 0 20px;font-size:13px}.advanced summary,details summary{cursor:pointer;min-height:44px;color:var(--accent);padding:8px 0}.advanced label{font-size:13px}.context-panel .primary{width:100%}.examples{border-top:1px solid var(--line);color:var(--muted);flex-wrap:wrap;align-items:center;gap:10px;margin-top:20px;padding-top:14px;font-size:12px;display:flex}.examples button{text-underline-offset:3px;color:var(--accent);background:0 0;border:0;min-height:44px;padding:5px 9px;font-size:13px;text-decoration:underline}.result{border-top:2px solid var(--accent);background:#fff;margin-top:24px;padding:22px}.result h2{margin-bottom:8px;font-size:21px}.result-value{font-size:38px;font-family:var(--serif);overflow-wrap:anywhere;margin:8px 0 16px;line-height:1.35}.result.error{border-color:#9a4839}.result.error p{color:#7b3528}.result-summary{grid-template-columns:minmax(140px,1fr) 2fr;gap:8px 18px;margin:20px 0;font-size:14px;display:grid}.result-summary dt{color:var(--muted)}.result-summary dd{overflow-wrap:anywhere;margin:0}.glyph{font-size:20px;font-family:var(--serif)}.method{color:var(--muted);font-size:14px}.exact-value{overflow-wrap:anywhere;font-variant-numeric:tabular-nums}.table-scroll{overflow-x:auto}table{border-collapse:collapse;text-align:left;font-variant-numeric:tabular-nums;width:100%;margin:18px 0 24px;font-size:14px}caption{text-align:left;color:var(--muted);margin-bottom:8px;font-size:13px}th{color:var(--muted);font-size:12px;font-weight:600}td,th{border-bottom:1px solid var(--line);padding:10px 12px 10px 0}.converter-grid{grid-template-columns:1fr 1.1fr 1.1fr auto;align-items:end;gap:16px;display:grid}.converter-grid label{font-size:13px}.target-note{color:var(--muted);align-self:center;font-size:14px}.reference-content{max-width:810px;margin:36px 0}.reference-content h2{margin-top:32px}.reference-content p{color:#435057}.sources-block{border-top:1px solid var(--line);margin:34px 0;padding-top:22px}.sources-block p{color:var(--muted);font-size:14px}.sources-block li{font-size:14px}.source-detail{color:var(--muted);overflow-wrap:anywhere;margin-top:4px;font-size:12px;display:block}.related{flex-wrap:wrap;gap:28px;margin:30px 0 50px;font-size:14px;display:flex}.edge-form{grid-template-columns:2fr 1fr auto auto;align-items:end;gap:16px;margin-bottom:14px;display:grid}.edge-form .quiet{font-size:12px}.edge-record{border-bottom:1px solid var(--line);padding:24px 0}.edge-record .sources-block{border:0;margin:18px 0 0;padding:0}.edge-record .sources-block ul{margin-bottom:0}.edge-record .sources-block h3{margin-bottom:8px;font-size:13px}.edge-record h2{margin-bottom:12px}.edge-record .eyebrow{font-size:10px}.context-line{color:var(--muted);font-size:13px}.method-record{border-top:1px solid var(--line);margin:28px 0;padding-top:26px}.method-record .sources-block{border:0;padding-top:0}.notice{border-left:3px solid var(--gold);background:var(--wash);padding:16px}.site-footer{border-top:1px solid var(--line);color:var(--muted);margin-top:60px;padding:28px 0;font-size:12px}.site-footer .container{justify-content:space-between;gap:20px;display:flex}.site-footer a{color:var(--muted)}@media (max-width:760px){.header-inner{flex-direction:column;align-items:flex-start;gap:8px;padding:18px 24px}nav{flex-wrap:wrap;gap:22px;font-size:13px}.container{padding:0 24px}h1{letter-spacing:-.6px;font-size:33px}.page-heading{padding:26px 0 20px}.lead{font-size:16px}.home-heading{padding:36px 0 28px}.home-heading h1{font-size:39px}.tool-grid{grid-template-columns:1fr;gap:22px}.tool{padding:18px}.symbol-keyboard{grid-template-columns:repeat(6,1fr);gap:5px}.symbol{min-height:49px}.converter-grid{grid-template-columns:1fr 1fr}.converter-grid .primary{grid-column:1/-1}.reference-columns{grid-template-columns:1fr;gap:22px}.reference-card{padding:20px}.directory-row{grid-template-columns:26px 1fr 20px;gap:15px;padding:24px 0}.directory-row h2,.reference-content h2{font-size:25px}.result{padding:16px}.result-value{font-size:32px}.result-summary{grid-template-columns:1fr;gap:3px}.result-summary dd{margin-bottom:8px}.edge-form{grid-template-columns:1fr 1fr}.edge-form>div:first-child,.edge-form .quiet{grid-column:1/-1}.site-footer .container{flex-direction:column;gap:7px}}@media (prefers-reduced-motion:no-preference){a,button{transition:background-color .12s,color .12s}}.tool-grid{grid-template-columns:1.16fr 1fr;gap:0 30px}.date-entry{grid-area:1/1}.keyboard-panel{grid-area:2/1}.context-panel{grid-area:1/2/3}@media (max-width:760px){.tool-grid{grid-template-columns:1fr;row-gap:16px}.date-entry{grid-area:1/1}.context-panel{grid-area:2/1}.keyboard-panel{grid-area:3/1}.numeral-input{letter-spacing:2px;font-size:26px}}