:root{--ink:#18181b;--muted:#52525b;--line:#dedee1;--page:#fafaf9;--surface:#fff;--soft:#f3f3f1;--focus:#2563eb;--error:#b42318;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:var(--ink);background:var(--page);font-synthesis:none;line-height:1.5}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,select{font:inherit;color:inherit}button,input,select{max-width:100%}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a:hover{text-decoration:underline;text-underline-offset:4px}button:disabled{cursor:not-allowed;opacity:.45}[hidden]{display:none!important}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}input:focus-visible,select:focus-visible{outline-offset:2px}button{min-height:44px}input,select{min-height:48px}input,select{border:1px solid var(--line);border-radius:6px;background:var(--surface);padding:10px 12px;min-width:0;font-size:16px}input[aria-invalid=true]{border-color:var(--error)}label{display:block;font-size:14px;font-weight:550;margin-bottom:8px}h1,h2,h3,p{margin:0}h1{font-size:32px;line-height:1.2;letter-spacing:-1px;font-weight:650}h2{font-size:22px;line-height:1.3;letter-spacing:-.5px;font-weight:600}h3{font-size:18px;line-height:1.4;font-weight:600}p{overflow-wrap:anywhere}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip{position:fixed;top:-100px;left:16px;z-index:20;background:var(--ink);color:#fff;padding:12px 16px;border-radius:6px}.skip:focus{top:8px}.header{height:64px;max-width:948px;padding:0 24px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;font-size:23px;font-weight:750;letter-spacing:-1px;white-space:nowrap}.icon{display:block;width:20px;height:20px;flex-shrink:0}.brand .icon{width:24px;height:24px}.brand:hover{text-decoration:none}.header nav{display:flex;gap:24px;font-size:14px}.header nav a{display:flex;align-items:center;min-height:44px}main{max-width:948px;margin:auto;padding:0 24px 64px}.hero{padding:48px 0 40px}.eyebrow,.section-kicker{font-size:12px;letter-spacing:1.2px;font-weight:650;color:var(--muted)}.hero h1{margin-top:12px}.hero>p{margin-top:16px;color:var(--muted);line-height:1.75}.search-block{width:100%;margin-top:32px}.search-wrap{position:relative;display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:6px;background:var(--surface);padding:0 16px}.search-wrap:focus-within{outline:3px solid var(--focus);outline-offset:2px}.search-wrap svg{flex-shrink:0;color:var(--muted)}.search-wrap input{width:100%;border:0;background:transparent;padding:12px 0;height:56px;outline:none}.search-wrap input:focus-visible{outline:none}.search-wrap kbd{border:1px solid var(--line);padding:0 7px;border-radius:4px;color:var(--muted);font-size:14px}.search-results{position:absolute;z-index:10;left:-1px;right:-1px;top:calc(100% + 8px);padding:8px;border:1px solid var(--line);border-radius:6px;background:var(--surface);box-shadow:0 4px 12px #18181b08;max-height:360px;overflow:auto;font-size:14px}.search-results a{display:flex;align-items:center;min-height:44px;padding:10px 12px;border-radius:4px}.search-results a:hover,.search-results a:focus{background:var(--soft);text-decoration:none}.converter select{appearance:none;-webkit-appearance:none;padding-right:48px;background-image:url(/chevron-down.svg);background-repeat:no-repeat;background-position:right 14px center;background-size:20px 20px;cursor:pointer}@media(forced-colors:active){.converter select{appearance:auto;-webkit-appearance:auto;background-image:none;padding-right:12px}}.hero,.workspace,.category-hero,.category-workspace{width:100%;max-width:900px;margin-inline:auto}.workspace{display:block}.converter{min-width:0;border:1px solid var(--line);border-radius:8px;background:var(--surface);overflow:hidden}.converter-tabs{padding:16px 20px;display:flex;flex-wrap:wrap;gap:8px;border-bottom:1px solid var(--line);background:#fcfcfb}.converter-tabs a{font-size:14px;display:flex;align-items:center;justify-content:center;padding:10px 12px;min-height:44px;border-radius:6px}.converter-tabs a:hover{background:var(--soft);text-decoration:none}.converter-tabs a.active{background:var(--ink);color:#fff}.converter-tabs .all-categories{gap:6px;color:var(--muted)}.converter-body{padding:32px}.converter-top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.live-badge{font-size:12px;color:var(--muted)}.input-help{font-size:14px;color:var(--muted);line-height:1.7;margin:12px 0 32px}.value-grid{display:grid;grid-template-columns:minmax(0,1fr) 44px minmax(0,1fr);gap:16px;align-items:center}.value-box{min-width:0;padding:24px;border:1px solid var(--line);border-radius:6px;background:#fff;align-self:stretch}.value-label{margin-bottom:8px}.measurement-value{height:72px;font-size:32px;font-weight:550;font-variant-numeric:tabular-nums;letter-spacing:-1px;width:100%;padding:12px 14px;border:1px solid #a1a1aa;border-radius:6px;background:var(--surface);line-height:1.3}.measurement-value:hover{border-color:var(--muted)}.measurement-value:focus{border-color:var(--focus)}.measurement-value[aria-invalid=true]{border-color:var(--error)}.result-box{background:var(--soft)}.unit-control{margin-top:24px}.unit-control select,.mixed-controls select{width:100%;text-overflow:ellipsis}.swap{height:44px;width:44px;display:grid;place-items:center;border:1px solid var(--line);border-radius:6px;background:var(--surface)}.swap:hover{background:var(--soft)}.mixed-controls{margin-top:24px}.mixed-fields{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;margin-top:24px}.mixed-fields input{font-size:28px;font-variant-numeric:tabular-nums;width:100%;padding:8px}.mixed-fields .field-help{grid-column:1/-1}.fixed-unit{font-size:14px;font-weight:550;margin-top:16px;padding-top:12px;border-top:1px solid var(--line)}.field-help{font-size:13px;color:var(--muted);line-height:1.6}.error{color:var(--error);font-size:14px;margin-top:12px;line-height:1.5}.error:empty{display:none}#font-context{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px}#font-context input{display:block;width:100%;margin-top:8px}.result-line{border-top:1px solid var(--line);margin-top:32px;padding-top:32px}.result-line p{font-size:24px;letter-spacing:-.5px;line-height:1.4;margin-top:8px;font-weight:550;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}.result-controls{display:flex;gap:24px;align-items:end;flex-wrap:wrap;margin-top:24px}.result-actions{display:flex;flex-wrap:wrap;gap:12px}.text-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;font-size:14px;padding:12px 16px;border:1px solid var(--line);border-radius:6px;background:#fff;white-space:nowrap}.text-button:hover{background:var(--soft);border-color:var(--muted)}.text-button[aria-pressed=true]{background:var(--ink);border-color:var(--ink);color:#fff}.precision-control{margin-left:auto;min-width:0}.precision-control label{font-size:13px;margin-bottom:4px}.precision-control select{font-size:14px;min-height:44px;width:100%}#precision-help{margin-top:12px}.formula{border-top:1px solid var(--line);padding-top:24px;margin-top:32px;display:grid;gap:12px}.formula code{font-size:14px;overflow-wrap:anywhere;white-space:pre-wrap;font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.notice{font-size:14px;color:var(--muted);margin-top:12px}.notice:empty{display:none}#share-fallback{width:100%;margin-top:16px}.saved{padding:48px 0;border-bottom:1px solid var(--line);margin-top:16px;scroll-margin-top:24px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:24px}.section-heading h2{margin-top:8px}.section-heading>span,.section-heading>p{font-size:14px;color:var(--muted)}#saved-pairs{display:flex;flex-wrap:wrap;gap:12px;font-size:14px;color:var(--muted)}.saved-pair{display:flex;border:1px solid var(--line);border-radius:6px;background:var(--surface);max-width:100%;overflow:hidden}.saved-pair a{padding:10px 12px;display:flex;align-items:center;min-height:44px;flex-wrap:wrap;gap:8px;overflow-wrap:anywhere;color:var(--ink)}.saved-pair button{display:grid;place-items:center;min-width:44px;flex-shrink:0;background:transparent;border:0;border-left:1px solid var(--line);font-size:20px}.saved-pair button:hover{background:var(--soft)}.categories{padding-top:48px;scroll-margin-top:24px}.category-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.category-card{border:1px solid var(--line);border-radius:6px;padding:24px;position:relative;background:transparent;min-width:0;transition:border-color .15s}.category-card:hover{border-color:var(--ink);text-decoration:none;background:#fdfdfc}.category-icon{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;color:var(--ink);font-family:system-ui,sans-serif}.category-card h3{font-size:16px;margin-top:16px}.category-card p{font-size:14px;color:var(--muted);margin-top:8px}.category-hero{padding:40px 0}.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:12px;font-size:14px;color:var(--muted)}.breadcrumb a{min-height:44px;display:flex;align-items:center}.category-title{margin-top:16px}.category-title p{margin-top:12px;color:var(--muted)}.category-workspace{min-width:0}.category-workspace .converter{width:100%}.category-workspace .converter-body{margin:auto}.reference-content{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:48px;padding-top:48px}.reference-content article{min-width:0}.reference-content h2{margin-top:8px}.reference-content p{color:var(--muted);line-height:1.8;margin-top:16px}.reference-content h3{margin-top:24px}.reference-note{border-top:1px solid var(--line);margin-top:24px;padding-top:4px}.reference-note a{display:inline-flex;align-items:center;gap:8px;min-height:44px;font-size:14px;text-decoration:underline;text-underline-offset:4px;margin-top:8px}.reference-table{align-self:start;min-width:0;border:1px solid var(--line);border-radius:10px;background:var(--surface);padding:24px}.reference-table h2{margin-top:0}.reference-table>p{font-size:14px;margin-top:12px}.table-scroll{overflow-x:auto;margin-top:20px}.reference-table table{width:100%;border-collapse:collapse;font-size:14px;font-variant-numeric:tabular-nums;table-layout:fixed}.reference-table th,.reference-table td{text-align:left;padding:12px;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.reference-table th{background:var(--soft);font-weight:600;vertical-align:top}.reference-table small{display:block;font-size:13px;color:var(--muted);margin-top:16px}footer{max-width:948px;margin:auto;border-top:1px solid var(--line);padding:32px 24px;display:flex;align-items:center;gap:24px;font-size:14px;color:var(--muted)}.footer-brand{font-size:20px;font-weight:700;color:var(--ink);letter-spacing:-.7px}footer p{font-size:13px}footer nav{margin-left:auto;display:flex;flex-wrap:wrap;gap:24px}footer nav a{display:flex;min-height:44px;align-items:center}.prose{max-width:800px;padding-top:48px;min-height:70vh}.prose h1{margin-top:16px}.prose h2{margin-top:32px}.prose p{margin-top:16px;line-height:1.8;color:var(--muted)}.prose a{text-decoration:underline;text-underline-offset:4px}.primary-link{display:inline-flex;align-items:center;gap:8px;min-height:44px;background:var(--ink);color:#fff;padding:12px 16px;border-radius:6px}@media(max-width:959px){.category-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.reference-content{gap:24px}.header nav{gap:20px}}@media(max-width:639px){main{padding-inline:20px}.header{height:auto;min-height:64px;flex-wrap:wrap;gap:8px 16px;padding:16px 20px 12px}.brand{min-height:44px}.header nav{width:100%;justify-content:space-between;gap:8px}.header nav a{font-size:14px}.hero{padding:32px 0}h1{font-size:32px;overflow-wrap:anywhere}.hero>p{line-height:1.7}.search-block{margin-top:24px}.search-wrap{gap:8px}.search-wrap input{font-size:16px}.search-wrap kbd{display:none}.converter-tabs{padding:12px;gap:8px}.converter-tabs a{padding:10px 12px;font-size:14px}.converter-body{padding:20px}.converter-top h2{font-size:20px}.live-badge{display:none}.input-help{margin-bottom:24px}.value-grid{grid-template-columns:minmax(0,1fr);grid-template-rows:1fr auto 1fr;gap:16px}.swap{justify-self:center;transform:rotate(90deg)}.value-box{padding:20px}.measurement-value{font-size:32px}.result-line p{font-size:24px}.result-controls{align-items:stretch}.result-actions{width:100%;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.result-actions .text-button{padding:12px 8px}#save{grid-column:1/-1}.precision-control{margin-left:0;width:100%}.precision-control select{max-width:100%}#font-context{grid-template-columns:minmax(0,1fr)}.section-heading{align-items:start;flex-wrap:wrap;gap:8px;margin-bottom:20px}.section-heading>p,.section-heading>span{font-size:13px}.saved{padding:32px 0}.categories{padding-top:40px}.category-grid{grid-template-columns:minmax(0,1fr);gap:16px}.category-card{padding:20px 20px 20px 68px;min-height:104px}.category-icon{position:absolute;left:20px;top:24px;width:32px;height:32px}.category-card h3{margin:0;padding:0}.category-card p{margin-top:6px}.category-hero{padding:24px 0}.category-title{margin-top:12px}.reference-content{grid-template-columns:minmax(0,1fr);gap:24px;padding-top:32px}.reference-table{padding:16px}.reference-table th,.reference-table td{padding:12px 8px}footer{padding:24px 20px;flex-wrap:wrap;gap:16px}footer p{flex:1;min-width:160px}footer nav{width:100%;margin-left:0;gap:24px}.prose{padding-top:32px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}.select-field{min-width:0;width:100%}.select-field>select{width:100%}.select-trigger{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;min-width:0;min-height:48px;padding:12px 14px;text-align:left;border:1px solid var(--line);border-radius:8px;background:var(--surface);font-size:14px;transition:border-color .15s,box-shadow .15s}.select-trigger:hover{border-color:#a1a1aa}.select-trigger[aria-expanded=true]{border-color:var(--ink);box-shadow:0 0 0 1px var(--ink)}.select-value{display:flex;flex-direction:column;gap:2px;min-width:0}.select-name{font-weight:550;line-height:1.4;overflow-wrap:anywhere}.select-symbol{font-size:12px;line-height:1.4;color:var(--muted);font-weight:400}.select-chevron{flex-shrink:0;color:var(--muted);transition:transform .15s}.select-trigger[aria-expanded=true] .select-chevron{transform:rotate(180deg)}.select-field[data-searchable=true] .select-trigger{min-height:66px}.select-panel{position:fixed;inset:auto;margin:0;padding:6px;max-width:calc(100vw - 24px);border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink);box-shadow:0 12px 40px #18181b1f,0 2px 8px #18181b0a;overflow:hidden}.select-panel:popover-open{display:flex;flex-direction:column}.select-panel::backdrop{background:transparent}.select-search{display:flex;align-items:center;gap:10px;padding:4px 8px 10px;margin:2px 2px 6px;border-bottom:1px solid var(--line);flex-shrink:0;color:var(--muted)}.select-search>svg{flex-shrink:0}.select-search input{min-width:0;width:100%;min-height:40px;border:0;border-radius:4px;padding:8px 2px;background:transparent;font-size:16px;outline:none}.select-search:focus-within{border-bottom-color:var(--ink)}.select-search>span{font-size:11px;padding:1px 5px;border:1px solid var(--line);border-radius:4px}.select-options{overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;min-height:0;scroll-padding:4px}.select-option{display:flex;align-items:center;gap:12px;min-height:46px;padding:10px 12px;border-radius:6px;cursor:pointer;font-size:14px;line-height:1.4}.select-option-name{flex:1;min-width:0;overflow-wrap:anywhere}.select-option-symbol{font-size:12px;color:var(--muted);text-align:right;max-width:38%;overflow-wrap:anywhere}.select-check{flex-shrink:0;visibility:hidden}.select-option[aria-selected=true] .select-check{visibility:visible}.select-option[aria-selected=true] .select-option-name{font-weight:650}.select-option:hover,.select-option.is-active{background:var(--soft)}.select-option:focus-visible{outline-offset:-3px}.select-empty{padding:18px 12px;color:var(--muted);font-size:14px}.precision-control .select-trigger{min-height:44px;font-size:14px}.precision-control{min-width:204px}@media(max-width:639px){.precision-control{min-width:0}.select-trigger{padding:12px}.select-option{min-height:48px;gap:8px;padding:10px}.select-search>span{display:none}}@media(forced-colors:active){.select-panel,.select-trigger,.select-option.is-active{border:1px solid ButtonText}.select-option[aria-selected=true]{outline:1px solid Highlight;outline-offset:-2px}}.measurement-field{display:flex;align-items:center;gap:6px;min-width:0;width:100%;min-height:72px;padding:10px 14px;border:1px solid #a1a1aa;border-radius:6px;background:var(--surface);font-size:32px;font-weight:550;font-variant-numeric:tabular-nums;letter-spacing:-1px;line-height:1.3}.measurement-field:hover{border-color:var(--muted)}.measurement-field:focus-within{border-color:var(--focus);outline:3px solid var(--focus);outline-offset:2px}.measurement-field:has(input[aria-invalid=true]){border-color:var(--error)}.measurement-number{display:grid;flex:0 1 auto;min-width:1ch;overflow:hidden}.measurement-sizing,.measurement-field .measurement-value{grid-area:1/1;font:inherit;letter-spacing:inherit;line-height:inherit}.measurement-sizing{visibility:hidden;white-space:pre;overflow:hidden}.measurement-field .measurement-value{width:100%;min-width:0;min-height:48px;height:48px;margin:0;padding:0;border:0;border-radius:0;background:transparent;outline:none}.measurement-unit{flex:0 0 auto;max-width:48%;font-size:18px;font-weight:450;letter-spacing:0;color:var(--muted);overflow-wrap:anywhere}.conversion-links{display:flex;flex-wrap:wrap;gap:8px 24px;list-style:none;margin:0;padding:0}.conversion-links a{display:inline-flex;align-items:center;min-height:44px;font-size:14px;text-decoration:underline;text-underline-offset:4px}.pair-formula code,.worked-example code{font-size:14px;white-space:normal;overflow-wrap:anywhere}.worked-example+.worked-example{margin-top:24px}.reference-content .faq-heading{margin-top:32px}.pair-directory{border-top:1px solid var(--line);padding:12px 0}.pair-directory summary{cursor:pointer;min-height:44px;align-content:center;font-size:14px;font-weight:550}.pair-directory .conversion-links{padding:12px 0 8px}:root{--input-border:#8a8a93}.measurement-field{border-color:var(--input-border)}.mixed-fields input:not([aria-invalid=true]),#font-context input:not([aria-invalid=true]){border-color:var(--input-border)}