:root{--bg:#f6f5f2;--card:#fff;--ink:#1b1d22;--soft:#5d6370;--line:#e4e2dc;--accent:#e4572e;--accent-ink:#b8401c;--accent-deep:#a63a17;--tint:#fff1ea;--cold:#2f7de1;--radius:16px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root{--bg:#14161a;--card:#1d2026;--ink:#eceef2;--soft:#a2a8b4;--line:#2e323a;--accent:#ff7043;--accent-ink:#ff9a76;--accent-deep:#b8401c;--tint:#2a1e1a;--cold:#5b9cf0;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--ink);margin:0;font:16px/1.6 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}a{color:var(--accent-ink);text-underline-offset:2px;text-decoration-thickness:1px}h1,h2,h3{letter-spacing:-.01em;line-height:1.2}h1{margin:6px 0 12px;font-size:clamp(24px,4.6vw,36px);font-weight:800}h2{margin:0 0 12px;font-size:21px}h3{margin:18px 0 8px;font-size:17px}.wrap{max-width:880px;margin:0 auto;padding:0 16px}.muted{color:var(--soft)}.lede{color:var(--soft);margin:0 0 16px;font-size:17px}.top{background:var(--card);border-bottom:1px solid var(--line);z-index:10;position:sticky;top:0}.top-in{align-items:center;gap:20px;height:58px;display:flex}.logo{color:var(--ink);flex:none;align-items:center;gap:9px;font-size:19px;font-weight:800;text-decoration:none;display:flex}main{padding-top:18px;padding-bottom:40px}.crumbs{color:var(--soft);flex-wrap:wrap;gap:6px;font-size:13px;display:flex}.crumbs span+span:before{content:"›";margin-right:6px}.crumbs a{color:var(--soft)}.conv{background:var(--card);border:2px solid var(--line);border-radius:22px;margin:6px 0 16px;padding:22px;box-shadow:0 1px #00000008,0 14px 36px -18px #3c28144d}.conv-row{grid-template-columns:1fr auto 1fr;grid-template-areas:"a s b""go go go";align-items:end;gap:12px 14px;display:grid}.conv-row>.field:first-child{grid-area:a}.conv-row>.swap{grid-area:s}.conv-row>.field:nth-child(3){grid-area:b}.conv-row>.btn-main{grid-area:go}.field{flex-direction:column;gap:8px;min-width:0;display:flex}select{font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);cursor:pointer;border-radius:10px;max-width:100%;padding:7px 10px;font-size:15px;font-weight:600}.unit-pick{border-width:2px;border-radius:12px;width:100%;padding:10px 12px;font-size:17px;font-weight:700}.unit-pick:focus,select:focus-visible{outline:3px solid color-mix(in srgb, var(--accent) 40%, transparent);outline-offset:1px}.field-box{border:2px solid var(--line);background:var(--bg);border-radius:14px;align-items:center;padding:0 16px;transition:border-color .15s;display:flex}.field-box:focus-within{border-color:var(--accent);background:var(--card)}.field-box.out{background:var(--tint)}.field-box.bad{border-color:#d93025}.field-box input{min-width:0;color:var(--ink);font:inherit;font-variant-numeric:tabular-nums;background:0 0;border:0;outline:none;flex:1;padding:12px 0;font-size:clamp(30px,7vw,42px);font-weight:800}.field-box b{color:var(--soft);margin-left:8px;font-size:20px}.swap{border:2px solid var(--line);background:var(--card);width:52px;height:52px;color:var(--accent-ink);cursor:pointer;border-radius:50%;place-items:center;margin-bottom:10px;transition:transform .25s,border-color .15s;display:grid}.swap svg{transform:rotate(90deg)}.swap:hover{border-color:var(--accent);transform:rotate(180deg)}.btn-main{white-space:nowrap;font:inherit;letter-spacing:.01em;color:#fff;background:var(--accent);cursor:pointer;box-shadow:0 4px 0 var(--accent-deep);border:0;border-radius:14px;padding:15px 20px;font-size:20px;font-weight:800;transition:transform 80ms,box-shadow 80ms,filter .15s}.btn-main:hover{filter:brightness(1.06)}.btn-main:active{box-shadow:0 1px 0 var(--accent-deep);transform:translateY(3px)}.answer{text-align:center;font-variant-numeric:tabular-nums;margin:18px 0 6px;font-size:clamp(20px,4.5vw,26px)}.answer strong{color:var(--accent-ink);font-size:clamp(28px,7vw,40px);font-weight:800}.answer .err{color:#d93025;font-weight:700}.answer.pop strong{animation:.35s pop;display:inline-block}@keyframes pop{0%{transform:scale(.9)}60%{transform:scale(1.08)}to{transform:scale(1)}}.conv-foot{border-top:1px dashed var(--line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-top:12px;padding-top:14px;display:flex}.formula{background:var(--bg);border-radius:8px;padding:6px 12px;font-family:ui-monospace,Cascadia Mono,Consolas,monospace;font-size:15px;font-weight:600}.tools{align-items:center;gap:10px;display:flex}.dec{color:var(--soft);align-items:center;gap:6px;font-size:14px;display:flex}.btn-copy{white-space:nowrap;font:inherit;border:2px solid var(--accent);background:var(--card);color:var(--accent-ink);cursor:pointer;border-radius:12px;align-items:center;gap:7px;padding:8px 16px;font-size:15px;font-weight:700;display:inline-flex}.btn-copy:hover{background:var(--tint)}.btn-copy:disabled{opacity:.45;cursor:default}.chips{flex-wrap:wrap;gap:7px;margin-top:14px;display:flex}.chips button{font:inherit;border:1px solid var(--line);background:var(--bg);color:var(--ink);cursor:pointer;border-radius:999px;padding:6px 12px;font-size:14px;font-weight:700}.chips button:hover,.chips button.on{border-color:var(--accent);color:var(--accent-ink);background:var(--tint)}.goto{margin:12px 0 0;font-size:15px;font-weight:700}.thermo{margin:14px 4px 22px}.thermo-bar{background:linear-gradient(90deg,#2f7de1,#5ec2e8 25%,#8fd694 40%,#f7c548 58%,#f08a3c 75%,#d63b2a);border-radius:999px;height:10px;position:relative}.thermo-bar i{background:var(--card);border:4px solid var(--ink);border-radius:50%;width:20px;height:20px;transition:left .25s;position:absolute;top:50%;transform:translate(-50%,-50%)}.thermo-marks{height:16px;color:var(--soft);margin-top:6px;font-size:11px;position:relative}.thermo-marks span{white-space:nowrap;position:absolute;transform:translate(-50%)}.thermo-marks span:first-child{transform:none}.thermo-marks span:last-child{transform:translate(-100%)}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);margin:16px 0;padding:20px}.card p{margin:0 0 10px}.card p:last-child{margin-bottom:0}.prose p{margin-bottom:12px}.page h1{margin-top:0}.big-formula code{background:var(--tint);color:var(--accent-ink);border-radius:12px;padding:10px 16px;font-family:ui-monospace,Consolas,monospace;font-size:clamp(18px,4vw,22px);font-weight:700;display:inline-block}.steps{font-variant-numeric:tabular-nums;margin:0;padding-left:22px}.steps li{margin:4px 0}.steps li:last-child{font-weight:700}.tbl{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%}.tbl th,.tbl td{text-align:left;border-bottom:1px solid var(--line);padding:9px 10px}.tbl th{color:var(--soft);text-transform:uppercase;letter-spacing:.03em;font-size:13px}.tbl tr:last-child td{border-bottom:0}.tbl tbody tr:nth-child(2n){background:color-mix(in srgb, var(--bg) 60%, transparent)}.tbl tr.hl td{background:var(--tint);font-weight:700}.chart{font-variant-numeric:tabular-nums;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:0 14px;font-size:14px;display:grid}.chart>span{border-bottom:1px solid var(--line);justify-content:space-between;padding:4px 6px;display:flex}.chart b{font-weight:700}.chart>span>span{color:var(--soft)}.links{grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:8px;display:grid}.links a,.cats a{color:var(--ink);border:1px solid var(--line);background:var(--bg);border-radius:12px;flex-direction:column;padding:10px 12px;font-weight:700;text-decoration:none;display:flex}.links a:hover,.cats a:hover,.vals a:hover{border-color:var(--accent)}.links small,.cats small{color:var(--soft);font-size:13px;font-weight:500;line-height:1.4}.cats{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px;display:grid}.vals{flex-wrap:wrap;gap:6px;display:flex}.vals a{color:var(--ink);border:1px solid var(--line);background:var(--bg);border-radius:999px;padding:4px 11px;font-size:14px;text-decoration:none}.faq details{border-bottom:1px solid var(--line);padding:10px 0}.faq details:last-child{border-bottom:0}.faq summary{cursor:pointer;font-weight:700}.faq p{color:var(--soft);margin:8px 0 0}.hero-answer{background:var(--card);border:2px solid var(--accent);text-align:center;border-radius:22px;margin:12px 0 14px;padding:22px}.hero-answer span{color:var(--soft);font-size:20px;font-weight:600;display:block}.hero-answer strong{color:var(--accent-ink);font-variant-numeric:tabular-nums;font-size:clamp(40px,10vw,60px);line-height:1.1;display:block}.h-out{margin-top:28px}.ad{min-height:90px;margin:16px 0}.ad.empty{border:1px dashed var(--line);color:var(--soft);border-radius:12px;place-items:center;font-size:12px;display:grid}.foot{border-top:1px solid var(--line);background:var(--card);padding:28px 0 18px;font-size:14px}.foot-in{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:18px;display:grid}.foot h3{margin:0 0 6px;font-size:14px}.foot h3 a{color:var(--ink);text-decoration:none}.foot ul{margin:0;padding:0;list-style:none}.foot li a{color:var(--soft);line-height:1.9;text-decoration:none}.foot li a:hover{color:var(--accent-ink)}.foot-base{border-top:1px solid var(--line);color:var(--soft);flex-wrap:wrap;gap:16px;margin-top:22px;padding-top:14px;display:flex}.foot-base a{color:var(--soft)}@media (max-width:640px){.conv{border-radius:18px;padding:16px}.conv-row{grid-template-columns:1fr;grid-template-areas:"a""s""b""go";gap:8px}.swap{z-index:1;background:var(--card);justify-self:center;width:48px;height:48px;margin:-6px 0;position:relative}.swap svg{transform:none}.field-box input{padding:10px 0}.btn-main{margin-top:6px;padding:16px}.answer{margin:14px 0 4px}.conv-foot{flex-direction:column;align-items:stretch}.formula{text-align:center}.tools{justify-content:space-between}.btn-copy{flex:1;justify-content:center;padding:10px 14px}.chips{scrollbar-width:none;flex-wrap:nowrap;margin:14px -16px 0;padding:0 16px 2px;overflow-x:auto;-webkit-mask-image:linear-gradient(90deg,#000 88%,#0000);mask-image:linear-gradient(90deg,#000 88%,#0000)}.chips::-webkit-scrollbar{display:none}.chips button{flex:none;padding:8px 14px}.card{padding:16px}.top-in{gap:8px;height:60px}.logo span{font-size:17px}.top-link{display:none}.top-link+.langs{margin-left:auto}body.menu-open{overflow:hidden}.thermo-marks span:nth-child(3){display:none}}.langs{flex:none;margin-left:auto;position:relative}.langs summary{cursor:pointer;color:var(--ink);border:1px solid var(--line);border-radius:10px;align-items:center;gap:6px;padding:6px 10px;font-size:14px;font-weight:700;list-style:none;display:flex}.langs summary::-webkit-details-marker{display:none}.langs-menu{background:var(--card);border:1px solid var(--line);z-index:20;border-radius:12px;min-width:190px;padding:6px;display:grid;position:absolute;top:calc(100% + 6px);right:0;box-shadow:0 12px 30px -10px #0000004d}.langs-menu a{color:var(--ink);border-radius:8px;padding:7px 10px;font-size:15px;text-decoration:none}.langs-menu a:hover{background:var(--bg)}.langs-menu a.on{color:var(--accent-ink);font-weight:700}.posts{gap:14px;margin-bottom:24px;display:grid}.post-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);flex-direction:column;gap:4px;padding:18px 20px;text-decoration:none;display:flex}.post-card:hover{border-color:var(--accent)}.post-card small{color:var(--soft)}.post-card b{font-size:20px;line-height:1.3}.post-card span{color:var(--soft)}.post-card em{color:var(--accent-ink);font-style:normal;font-weight:700}.post .prose{font-size:17px}.post .prose h2{margin-top:26px}.post .prose .tbl{margin:8px 0 16px}.post-tool{margin:18px 0}.post-tool .conv{margin:0}.post-links{padding-left:20px}.post-links a{font-weight:700}.top-in{gap:14px;position:relative}.menu{position:static}.menu-btn{font:inherit;color:var(--ink);background:var(--bg);border:2px solid var(--line);cursor:pointer;border-radius:12px;align-items:center;gap:8px;padding:8px 12px;font-size:15px;font-weight:800;display:inline-flex}.menu-btn:hover,.menu-btn.on{border-color:var(--accent);color:var(--accent-ink)}.menu-btn .chev{transition:transform .2s}.menu-btn.on .chev{transform:rotate(180deg)}.top-link{color:var(--soft);border-radius:10px;margin-left:auto;padding:8px 10px;font-size:15px;font-weight:700;text-decoration:none}.top-link:hover,.top-link.on{color:var(--ink);background:var(--bg)}.top-link+.langs{margin-left:0}.menu-panel{background:var(--card);border:1px solid var(--line);z-index:30;border-radius:18px;max-height:min(78vh,720px);padding:14px;position:absolute;top:calc(100% + 4px);left:16px;right:16px;overflow:auto;box-shadow:0 24px 60px -20px #00000073}.menu-search{border:2px solid var(--line);background:var(--bg);color:var(--soft);border-radius:14px;align-items:center;gap:10px;margin-bottom:12px;padding:0 12px;display:flex}.menu-search:focus-within{border-color:var(--accent)}.menu-search input{min-width:0;color:var(--ink);font:inherit;background:0 0;border:0;outline:none;flex:1;padding:13px 0;font-size:17px}.menu-close{color:var(--soft);cursor:pointer;background:0 0;border:0;padding:6px;font-size:18px}.menu-cats{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px;display:grid}.menu-cat{border:1px solid var(--line);background:var(--bg);border-radius:14px;padding:12px}.menu-cat.on{border-color:var(--accent)}.menu-cat-head{color:var(--ink);align-items:center;gap:10px;margin-bottom:8px;font-size:16px;text-decoration:none;display:flex}.menu-cat-head:hover b{color:var(--accent-ink)}.cat-badge{background:var(--tint);width:36px;height:36px;color:var(--accent-ink);border-radius:10px;flex:none;place-items:center;display:grid}.menu-pairs{flex-wrap:wrap;gap:5px;display:flex}.menu-pairs a{color:var(--soft);border:1px solid var(--line);background:var(--card);border-radius:999px;padding:3px 9px;font-size:13px;font-weight:700;text-decoration:none}.menu-pairs a:hover,.menu-pairs a.on{color:var(--accent-ink);border-color:var(--accent)}.menu-results{gap:4px;margin:0;padding:0;list-style:none;display:grid}.menu-results a{color:var(--ink);border-radius:12px;align-items:center;gap:12px;padding:11px 12px;text-decoration:none;display:flex}.menu-results a:hover,.menu-results li:first-child a{background:var(--bg)}.menu-results b{min-width:96px;font-size:16px}.menu-results small{color:var(--soft);font-size:14px}.menu-results .cat-icon{color:var(--accent-ink);flex:none}.menu-results .none{padding:12px}.cats a{flex-direction:row;align-items:flex-start;gap:12px}.cats a>span:last-child{flex-direction:column;display:flex}@media (max-width:640px){.menu{min-width:0}.menu-btn{max-width:100%;padding:8px 10px;font-size:14px}.menu-btn span{white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.menu-btn .chev,.langs summary svg{display:none}.langs summary{padding:8px 10px}.top-in{gap:8px}.menu-panel{z-index:50;border:0;border-radius:0;width:auto;max-height:none;padding:12px 16px 24px;position:fixed;inset:0}.menu-search input{font-size:16px}.menu-cats{grid-template-columns:1fr 1fr;gap:8px}.menu-cat{padding:10px}.cat-badge{width:32px;height:32px}.menu-cat-head{gap:8px;font-size:15px}.menu-pairs a{padding:3px 7px;font-size:12.5px}}