@charset "UTF-8";
:root{--paper:#efeee9;--ink:#242b2e;--muted:#606968;--line:#d4d7d1;--orange:#a43e20;--peach:#f6b496;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;--sans:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color-scheme:light;font-family:var(--sans);color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-underline-offset:4px}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #147b88;outline-offset:3px}input:focus-visible,select:focus-visible{outline:3px solid #147b88;outline-offset:3px}button{touch-action:manipulation}input{min-width:0;border-radius:0}button{border-radius:3px}header,main,footer{width:min(1080px,calc(100% - 72px));margin:auto}header{height:88px;display:flex;align-items:center;gap:32px;border-bottom:1px solid #cdd0c8}.brand{display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:750;letter-spacing:-.7px;text-decoration:none;white-space:nowrap}.logo-mark{width:25px;height:25px;display:flex;gap:3px;align-items:end}.logo-mark i{display:block;width:4px;background:var(--orange);height:15px}.logo-mark i:nth-child(2){height:24px}.logo-mark i:nth-child(3){height:19px}.logo-mark i:nth-child(4){height:10px}header nav{display:flex;gap:26px;margin-left:auto}header nav a{font-size:13px;text-decoration:none}.edition{font:10px var(--mono);letter-spacing:1px;border:1px solid #bfc4bb;padding:6px 8px;color:#60665d}.intro{display:flex;align-items:center;justify-content:space-between;padding:34px 0 25px;gap:20px}.eyebrow{font:10px var(--mono);font-weight:600;letter-spacing:1.6px;color:var(--orange);margin:0 0 13px}h1{font-size:32px;letter-spacing:-1.2px;line-height:1.14;margin:0 0 12px;font-weight:650}h1 span{color:var(--muted)}.intro p:not(.eyebrow){margin:0;color:var(--muted);font-size:14px;line-height:1.55}.utility-tag{font:10px var(--mono);letter-spacing:1px;border-left:2px solid #9eaaa0;padding:5px 0 5px 10px;color:#616a62;white-space:nowrap}.workstation{border:1px solid #bbc2bc;border-radius:6px;overflow:hidden;background:#fafbf8;box-shadow:0 12px 32px #242b2e08;scroll-margin-top:12px}.transport{display:grid;grid-template-columns:320px 1fr;background:var(--ink);color:#f1f2eb;padding:28px 30px;gap:36px}.tempo-section{border-right:1px solid #50585a;padding-right:30px}.panel-label{font:10px var(--mono);letter-spacing:1.3px;color:#b9c2c1;display:block}.tempo-entry{display:flex;align-items:baseline;gap:10px;margin:12px 0 6px}.tempo-entry input{background:transparent;color:#f7f6f0;border:0;border-bottom:1px solid #687170;font:46px var(--mono);letter-spacing:-2px;width:166px;max-width:100%;padding:0 0 4px}.tempo-entry>span{font:12px var(--mono);color:#bcc3c0}.nudge{display:flex;flex-direction:column;align-self:center;gap:4px;margin-left:auto}.nudge button{border:1px solid #626b6b;background:#333c40;color:#f1f3ed;font-size:18px;width:32px;height:28px;line-height:20px}.tempo-section p{font-size:10px;color:#b9c2c1;margin:7px 0 11px}.presets{display:flex;gap:7px}.presets button{border:1px solid #596362;color:#d7dcd6;background:transparent;padding:7px 10px;font:11px var(--mono);min-height:32px}.presets button.active{border-color:var(--peach);color:var(--peach);background:#f6b4960b}.presets button:hover,.nudge button:hover{background:#48514f}.selected-top{display:flex;justify-content:space-between;gap:12px;align-items:center}.selection-label{font:12px var(--mono);background:#f6b4961a;color:var(--peach);border:1px solid #946850;padding:6px 9px;white-space:nowrap}.readout{display:flex;align-items:baseline;gap:15px;margin:15px 0 12px}.readout output{font:clamp(38px,5.4vw,65px) var(--mono);letter-spacing:-3px;line-height:1.12;color:#f8f6ed;overflow-wrap:anywhere}.readout>span{font:22px var(--mono);color:var(--peach)}.result-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px}.result-bottom p{font:12px var(--mono);color:#bac4c1;margin:0;line-height:1.6}.copy-primary{background:var(--peach);color:#36251e;border:0;padding:12px 18px;font-size:12px;font-weight:650;min-height:40px;white-space:nowrap}.copy-primary:hover{background:#ffd0b8}.grid-toolbar{display:flex;align-items:center;justify-content:space-between;padding:22px 27px 17px;gap:16px}.grid-toolbar h2{font-size:15px;margin:0 0 4px;font-weight:650}.grid-toolbar p{font-size:11px;margin:0;color:var(--muted)}.unit-switch{display:flex;border:1px solid #a7b1a7;padding:3px;gap:3px;background:#edf0e9}.unit-switch button{font:12px var(--mono);border:0;background:transparent;padding:8px 17px;min-height:34px}.unit-switch button[aria-pressed=true]{background:var(--ink);color:#fff}table{border-collapse:collapse;width:100%;table-layout:fixed}#timing-grid th:first-child{width:22%}#timing-grid th{text-align:left}#timing-grid thead th{font-size:12px;font-weight:550;padding:14px 20px;border-bottom:1px solid var(--line);border-top:1px solid var(--line);background:#e8ece5}#timing-grid thead th:first-child{font:10px var(--mono);padding-left:28px;letter-spacing:1px}thead th small{font:10px var(--mono);color:#59675d;margin-left:8px}#timing-grid tbody th{border-bottom:1px solid var(--line);padding:0 20px 0 28px;font-weight:400}.note-fraction{font:15px var(--mono);display:inline-block;min-width:42px}.note-name{font-size:10px;color:var(--muted);margin-left:12px}#timing-grid td{padding:0;border-bottom:1px solid var(--line);border-left:1px solid #e1e5dd}.cell{background:transparent;border:0;border-radius:0;color:var(--ink);width:100%;padding:14px 20px;min-height:52px;display:flex;align-items:center;justify-content:space-between;gap:4px;text-align:left}.cell-value{font:17px var(--mono);letter-spacing:-.5px}.cell-indicator{font:9px var(--mono);color:#66746b}.cell[aria-pressed=true]{background:#f9d9c7;box-shadow:inset 3px 0 0 var(--orange)}.cell[aria-pressed=true] .cell-value{color:#81351f;font-weight:700}.cell[aria-pressed=true] .cell-indicator{color:#81351f}.cell:hover:not(:disabled):not([aria-pressed=true]){background:#e8ede3}.cell:focus-visible{position:relative;outline-offset:-4px}#timing-grid tr:last-child th,#timing-grid tr:last-child td{border-bottom:0}.grid-foot{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;padding:12px 28px;background:#f1f3ed;color:#56645b;font:10px var(--mono)}.copy-status{font:12px var(--mono);color:#40594d;line-height:1.6;margin:0;padding:0 28px}.copy-status:not(:empty){padding:14px 28px;border-top:1px solid var(--line)}.error{color:#9c2c15;font-size:12px;line-height:1.5}.error:empty{display:none}.tempo-section .error{color:#ffc3b0;font-size:12px;margin-top:12px}.manual-copy{padding:20px 28px;border-top:1px solid var(--line);font-size:13px}.manual-copy label{display:block;margin-bottom:10px}.manual-copy input{padding:10px;border:1px solid #718176;background:#fff;max-width:70%;font-family:var(--mono)}.manual-copy button{padding:10px;border:1px solid #718176;background:transparent;margin-left:8px}.reverse-section{padding:28px 0;border-bottom:1px solid #c9cec4}.section-heading{display:flex;gap:14px;align-items:center;margin-bottom:22px}.section-number{font:11px var(--mono);align-self:flex-start;color:var(--orange);border-top:2px solid var(--orange);padding-top:6px;margin-top:3px}.section-heading h2{font-size:19px;margin:0 0 6px;letter-spacing:-.4px}.section-heading p{margin:0;font-size:12px;color:var(--muted)}.reverse-arrow{margin-left:auto;font-size:30px;color:#859182}.reverse-controls{display:grid;grid-template-columns:1fr 1fr 1fr 1.3fr;gap:18px}.reverse-controls label{display:block;font-size:11px;margin-bottom:8px;font-weight:600}.reverse-controls label span{color:var(--muted);font-family:var(--mono);font-weight:400}.reverse-controls input,.reverse-controls select{width:100%;height:44px;border:1px solid #aab3a7;border-radius:3px;padding:9px 12px;color:var(--ink);background:#f9faf6;font:14px var(--mono)}.reverse-result{padding-left:22px;border-left:1px solid #c9cec4}.reverse-result>span{font:9px var(--mono);letter-spacing:1px;color:var(--muted)}.reverse-result>div{font:12px var(--mono);margin-top:10px}.reverse-result output{font-size:28px;letter-spacing:-1px;overflow-wrap:anywhere}.reverse-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:16px}.reverse-bottom p{font:11px var(--mono);color:var(--muted);line-height:1.7;margin:0}.reverse-bottom>div{display:flex;gap:12px;flex-shrink:0}.text-button{background:transparent;border:0;font-size:12px;text-decoration:underline;text-underline-offset:4px;min-height:42px;padding:8px}.apply-button{background:#e0e6db;border:1px solid #aab6a3;padding:10px 14px;font-size:12px;min-height:42px}.apply-button:hover{background:#d0dcc9}.guide{display:grid;grid-template-columns:1fr 1.15fr;gap:80px;padding:45px 0 50px}.guide h2{font-size:26px;letter-spacing:-.7px;margin:0 0 16px;line-height:1.25}.guide p{font-size:13px;color:#56615b;line-height:1.85;margin:10px 0}.guide a{display:inline-block;font-size:12px;margin-top:15px}.guide details{border-bottom:1px solid #c9cec4;padding:0 0 14px;margin-bottom:15px}.guide summary{font-size:13px;cursor:pointer;line-height:1.5;font-weight:600}.guide details p{font-size:12px;padding-left:16px}footer{display:flex;align-items:center;gap:25px;border-top:1px solid #c9cec4;padding:25px 0 35px}footer .brand{font-size:15px}footer .logo-mark{transform:scale(.75);transform-origin:left center;width:20px}footer>span{font-size:11px;color:#667061}footer nav{margin-left:auto;display:flex;gap:22px;font-size:11px}.article{max-width:760px;padding:40px 0 70px;min-height:65vh}.article h1{font-size:43px;margin:20px 0}.article .lead{font-size:19px;color:#56615b;line-height:1.6}.article h2{font-size:22px;margin:35px 0 12px;letter-spacing:-.4px}.article p,.article li{font-size:15px;line-height:1.85}.article li{margin-bottom:10px}.back{display:block;font-size:12px;margin-bottom:40px}.formula{background:#e1e7dd;border-left:3px solid var(--orange);padding:20px;font:13px/2 var(--mono);overflow-wrap:anywhere}.mobile-result{display:none}.notice{padding:16px;background:#f9d9c7;font-size:13px;line-height:1.6}.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:8px;left:8px;background:white;padding:12px;z-index:20;transform:translateY(-150%)}.skip:focus{transform:none}[hidden]{display:none!important}
@media(min-width:1500px){header,main,footer{width:min(1160px,calc(100% - 100px))}.intro{padding-top:42px}.cell{min-height:56px}}
@media(max-width:800px){header,main,footer{width:calc(100% - 40px)}.edition,.utility-tag{display:none}.transport{grid-template-columns:240px 1fr;padding:22px;gap:24px}.tempo-section{padding-right:20px}.tempo-entry input{width:128px;font-size:37px}.readout output{font-size:42px}.result-bottom{align-items:flex-start;flex-direction:column}.copy-primary{padding:9px 12px}.note-name{display:none}.guide{gap:32px}.cell-indicator{font-size:8px}.reverse-controls{gap:10px}.reverse-result{padding-left:14px}.reverse-bottom{align-items:flex-start}footer>span{display:none}}
@media(max-width:560px){header,main,footer{width:calc(100% - 28px)}header{height:68px;gap:12px}.brand{font-size:18px}header nav{gap:16px}header nav a{font-size:11px}.intro{padding:25px 0 20px}h1{font-size:27px;letter-spacing:-.9px}.intro p:not(.eyebrow){font-size:12px;max-width:310px}.eyebrow{font-size:9px;margin-bottom:10px}.transport{grid-template-columns:1fr;padding:20px;gap:18px}.tempo-section{border-right:0;padding-right:0;display:grid;grid-template-columns:1fr auto;align-items:center;column-gap:14px}.tempo-section>label{grid-column:1/-1}.tempo-entry{margin:12px 0 0;gap:8px}.tempo-entry input{width:123px;font-size:38px}.tempo-entry>span{font-size:10px}.nudge{margin-left:0;gap:3px}.nudge button{width:28px;height:26px}.presets{display:grid;grid-template-columns:1fr 1fr;gap:5px;grid-column:2;grid-row:2/4;margin-top:9px}.presets button{padding:7px 9px;min-height:30px}.tempo-section p{margin:8px 0 0;font-size:9px;grid-column:1}.tempo-section p.error{grid-column:1/-1}.selected-section{border-top:1px solid #515b5b;padding-top:16px}.selection-label{font-size:10px;padding:4px 7px}.panel-label{font-size:9px;letter-spacing:1px}.readout{margin:10px 0 4px;gap:10px}.readout output{font-size:43px;letter-spacing:-2px}.readout>span{font-size:18px}.result-bottom{flex-direction:row;align-items:center;gap:8px}.result-bottom p{font-size:10px}.copy-primary{font-size:10px;min-height:36px;padding:8px 10px}.grid-toolbar{padding:16px 13px;gap:8px}.grid-toolbar h2{font-size:14px}.grid-toolbar p{font-size:10px}.unit-switch button{padding:8px 13px;min-height:32px}#timing-grid th:first-child{width:18%}#timing-grid thead th{padding:11px 8px;font-size:10px}#timing-grid thead th:first-child{padding-left:13px;font-size:9px}thead th small{display:block;margin:5px 0 0;font-size:9px}#timing-grid tbody th{padding:0 8px 0 13px}.note-fraction{font-size:12px;min-width:0}.cell{padding:12px 8px;min-height:52px;position:relative;display:block;text-align:left}.cell-value{font-size:13px;letter-spacing:-.7px}.cell-indicator{display:none}.cell[aria-pressed=true]{box-shadow:inset 3px 0 0 var(--orange)}.cell[aria-pressed=true]::after{content:'✓';font:9px var(--mono);position:absolute;right:5px;bottom:3px;color:#81351f}.grid-foot{flex-direction:column;gap:6px;padding:12px 13px;font-size:9px}.copy-status:not(:empty){padding:12px 13px;font-size:11px}.reverse-section{padding:26px 0}.section-heading{gap:10px;margin-bottom:18px}.section-heading h2{font-size:18px}.section-heading p{font-size:11px}.reverse-controls{grid-template-columns:1fr 1fr;gap:15px}.reverse-controls>div:first-child{grid-column:1}.reverse-controls>div:nth-child(2){grid-column:1;grid-row:2}.reverse-controls>div:nth-child(3){grid-column:2;grid-row:2}.reverse-result{grid-column:2;grid-row:1;padding-left:15px}.reverse-result output{font-size:26px}.reverse-controls input,.reverse-controls select{font-size:12px;padding:10px}.reverse-bottom{flex-direction:column;gap:12px}.reverse-bottom>div{align-self:flex-end}.guide{grid-template-columns:1fr;gap:28px;padding:32px 0}.guide h2{font-size:25px}.guide p{font-size:13px}.guide details p{font-size:12px}.guide summary{font-size:13px}.interactive .mobile-result{position:sticky;bottom:8px;display:flex;align-items:center;justify-content:space-between;gap:12px;background:#242b2e;box-shadow:0 4px 20px #0003;border:1px solid #535e5b;border-radius:4px;color:#fff;padding:11px 14px;margin:0 0 16px;z-index:10}.mobile-result>div{min-width:0}.mobile-result span{display:block;font:9px var(--mono);color:#d5c2b7;margin-bottom:4px}.mobile-result strong{font:19px var(--mono);overflow-wrap:anywhere}.mobile-result button{background:var(--peach);color:#36251e;border:0;padding:12px;font-size:12px;min-height:44px;flex-shrink:0}.article{padding-top:26px}.article h1{font-size:34px}.article .lead{font-size:17px}.article p,.article li{font-size:14px}.formula{font-size:11px;padding:13px}footer{flex-wrap:wrap;gap:15px;padding-bottom:24px}footer nav{gap:16px;font-size:10px}.manual-copy{padding:15px}.manual-copy input{max-width:65%}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
@media(max-width:560px){.cell-value{font-size:clamp(10px,3.3vw,13px)}.readout output.long-value{font-size:clamp(25px,8vw,38px);letter-spacing:-1.5px}.tempo-section{grid-template-columns:minmax(0,1fr) auto}.tempo-entry{min-width:0}.mobile-result strong{font-size:clamp(16px,4.8vw,19px)}}
@media(max-width:360px){.transport{padding:17px 13px}.tempo-section{column-gap:10px}.tempo-entry{gap:5px}.tempo-entry input{width:91px;font-size:32px}.nudge button{width:26px}.presets button{padding:7px 8px}.result-bottom p{font-size:9px}.selected-top{gap:6px}.selection-label{font-size:9px}.grid-toolbar{padding:14px 10px}.grid-toolbar p{font-size:9px}.unit-switch button{padding:8px 10px}.cell{padding-left:6px;padding-right:6px}.reverse-result output{font-size:23px}.reverse-controls{gap:12px}}
@media(max-width:560px){.cell-value{font-size:13px}.cell-value.long-value{font-size:clamp(10px,3.3vw,13px)}}
.quick-formula{font-family:var(--mono);border-left:2px solid var(--orange);padding-left:14px}.guide .precision-note{font-size:11px}#converter:focus{outline:none}body:not(.interactive) .cell:disabled{opacity:1}
@media(max-width:560px){
  .tempo-section{display:block}.tempo-entry{gap:8px}.tempo-entry input{flex:1;width:0;min-width:0}.nudge{flex-direction:row;margin-left:0;gap:6px}.nudge button{width:44px;height:44px}.presets{display:flex;gap:8px;margin-top:14px}.presets button{flex:1;min-height:44px;font-size:12px}.tempo-section p{font-size:10px}
  .copy-primary,.unit-switch button,.text-button,.apply-button{min-height:44px}.copy-primary{font-size:12px}.reverse-controls input,.reverse-controls select,.manual-copy input{font-size:16px}.reverse-controls select{padding:8px 5px;letter-spacing:-.7px}.reverse-controls label{font-size:12px}
  .interactive .mobile-result{position:fixed;left:14px;right:14px;bottom:max(8px,env(safe-area-inset-bottom));margin:0}.cell{scroll-margin-bottom:100px}.grid-foot{min-height:100px;justify-content:center}
  .manual-copy button{min-height:44px}.manual-copy input{max-width:calc(100% - 76px)}
  header nav a,footer nav a{min-height:44px;display:inline-flex;align-items:center}.guide summary{min-height:44px;padding:11px 0}
}