@font-face{font-family:Instrument;src:url(fonts/InstrumentSerif-Regular.ttf) format('truetype');font-weight:400;font-display:swap}
@font-face{font-family:Instrument;src:url(fonts/InstrumentSerif-Italic.ttf) format('truetype');font-weight:400;font-style:italic;font-display:swap}
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*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;color:var(--ink);background:var(--paper);font:16px/1.6 var(--sans);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select{font:inherit;color:inherit}button,select{cursor:pointer}button{background:none}button,input,select{border-radius:0}a,button,input,select{touch-action:manipulation}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:4px}[hidden]{display:none!important}::selection{background:#e2bbae}h1,h2,h3,p{margin-top:0}h1,h2,h3{font-weight:400}h1,h2,h3{text-wrap:balance}h2{font:42px/1.12 var(--serif)}h3{line-height:1.25}img,svg{max-width:100%}.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:absolute;inset-inline-start:20px;top:-80px;background:var(--ink);color:white;padding:12px;z-index:100}.skip:focus{top:10px}
.masthead,main,.site-footer{max-width:1440px;margin-inline:auto;padding-inline:54px}.masthead{height:126px;display:flex;align-items:center;gap:34px;border-bottom:1px solid var(--ink)}.brand{display:inline-flex;flex-shrink:0}.wordmark{display:inline-flex;align-items:baseline;font-family:var(--serif);font-size:49px;line-height:1;letter-spacing:-2.2px;white-space:nowrap;direction:ltr}.wordmark>span{font-style:italic}.wordmark em{font-style:normal;margin-inline-start:7px}.wordmark i{font-style:normal;color:var(--accent)}.masthead nav{display:flex;gap:25px;margin-inline-start:auto;font-size:13px}.masthead nav a{padding-block:8px;border-bottom:1px solid transparent}.masthead nav a:hover,.masthead nav a[aria-current]{border-color:var(--accent);color:var(--accent)}.language{border-inline-start:1px solid var(--rule);padding-inline-start:20px}.language select{background:transparent;border:0;padding:8px 0;font-size:13px;max-width:144px;min-height:44px}
.overline{font:11px/1.5 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}.frontispiece{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(260px,.75fr);gap:80px;padding-block:66px 76px;align-items:center}.hero-copy .overline{display:flex;align-items:center;gap:10px;margin-bottom:24px}.edition-mark{color:var(--accent);font-size:24px;letter-spacing:0}.hero-copy h1{font:clamp(54px,5.7vw,87px)/.99 var(--serif);letter-spacing:-.025em;max-width:860px;margin-bottom:25px}.hero-copy h1 em{display:block;font-weight:400;color:var(--accent);margin-top:8px}.intro{font-size:15px;max-width:560px;line-height:1.75;color:#53615f;margin-bottom:0}.measure-plate{background:var(--pale);padding:25px 30px 22px;border-top:3px solid var(--ink);transform:rotate(-2deg);position:relative;max-width:390px}.measure-plate:after{content:'';width:18px;height:18px;border-radius:50%;background:var(--paper);position:absolute;right:12px;bottom:12px}.plate-top{display:flex;justify-content:space-between;font:11px/1.5 monospace;letter-spacing:.12em}.ruler{border-top:1px solid var(--ink);background:repeating-linear-gradient(90deg,var(--ink) 0 1px,transparent 1px 12px);background-size:100% 12px;background-repeat:no-repeat;display:flex;justify-content:space-between;margin-block:24px 15px;padding-top:17px;font:10px monospace;direction:ltr}.plate-number{font:112px/.9 var(--serif);letter-spacing:-5px}.plate-number>span{font:38px var(--serif);margin-left:8px;letter-spacing:0}.plate-equation{font:27px var(--serif);margin-top:8px;direction:ltr}.measure-plate>a{font-size:13px;display:flex;justify-content:space-between;gap:16px;padding-block:15px 10px;margin-top:15px;border-top:1px solid var(--rule)}.measure-plate>a:hover{color:var(--accent)}.measure-plate>p{font-size:11px;line-height:1.5;max-width:250px;color:var(--muted);margin-bottom:0}
.directory{border-top:1px solid var(--ink);padding-top:30px}.directory-head{display:flex;justify-content:space-between;gap:35px;align-items:center;margin-bottom:34px}.directory-head h2{margin:7px 0 0;max-width:650px}.directory-head>.overline{margin:0}.search{display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--ink);padding:12px 0;width:390px;max-width:45%}.search>span[aria-hidden]{font-size:26px;line-height:1}.search input{border:0;background:transparent;width:100%;min-width:0;font-size:13px;outline-offset:3px}.search input::placeholder{color:var(--muted);opacity:1}.search kbd{font:12px monospace;border:1px solid var(--rule);padding:0 7px;color:var(--muted)}.directory-layout{display:grid;grid-template-columns:224px minmax(0,1fr);gap:50px}.directory-index{position:sticky;top:22px;align-self:start;display:flex;flex-direction:column}.directory-index button{border:0;border-top:1px solid var(--rule);padding:12px 0;display:flex;text-align:start;gap:15px;align-items:start;justify-content:space-between;font-size:12px;line-height:1.45;min-height:44px}.directory-index button:last-child{border-bottom:1px solid var(--rule)}.directory-index button>span{font:10px/1.7 monospace;color:var(--muted)}.directory-index button.active{color:var(--accent);border-top-color:var(--accent)}.directory-index button:hover{color:var(--accent)}.tool-group{margin-bottom:44px;scroll-margin-top:28px}.group-title{display:flex;gap:18px;align-items:baseline;border-bottom:2px solid var(--ink);padding-bottom:12px}.group-title>span{font:11px monospace;color:var(--accent)}.group-title>span:last-child{margin-inline-start:auto;color:var(--muted)}.group-title h3{margin:0;font:30px/1.2 var(--serif)}.tool-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:32px}.tool-card{display:flex;gap:13px;padding:19px 0;border-bottom:1px solid var(--rule);min-width:0;align-items:baseline}.tool-card strong{font-weight:400;font-size:14px;line-height:1.45;display:block;overflow-wrap:anywhere}.tool-card small{display:block;color:var(--muted);font-size:10px;letter-spacing:.025em;margin-top:4px}.tool-number{font:10px monospace;color:var(--muted);flex-shrink:0}.tool-card .arrow{margin-inline-start:auto;font-size:16px;flex-shrink:0;color:var(--muted)}.tool-card:hover strong,.tool-card:hover .arrow{color:var(--accent)}#no-results{padding:30px 0}#no-results h3{font:32px var(--serif)}
.notes-section{padding-block:45px 75px;margin-top:24px;border-top:1px solid var(--ink)}.directory-head>a{font-size:13px;flex-shrink:0;color:var(--accent)}.guide-index{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:36px}.guide-preview{display:flex;flex-direction:column;align-items:start;position:relative;min-width:0}.guide-num{font:11px monospace;position:absolute;top:15px;left:17px;color:var(--muted)}.guide-figure{height:185px;background:var(--pale);width:100%;display:flex;align-items:center;justify-content:center;gap:24px;color:var(--ink);margin-bottom:23px;direction:ltr}.figure-2{background:#e9d7c8}.figure-3{background:#dce2df}.figure-big{font:73px/1 var(--serif)}.figure-big>span{display:block;font:13px monospace;text-align:center;margin-top:10px}.guide-figure>i{font:35px var(--serif);color:var(--accent)}.guide-preview h3{font:32px/1.1 var(--serif);margin-bottom:15px}.guide-preview>p{font-size:13px;line-height:1.75;color:var(--muted);margin-bottom:19px}.read-link{font-size:12px;color:var(--accent);margin-top:auto;border-bottom:1px solid var(--accent);padding-bottom:3px}.guide-preview:hover h3{color:var(--accent)}.screen-sketch{width:170px;aspect-ratio:16/9;border:2px solid var(--ink);display:flex;position:relative;align-items:center;justify-content:center}.screen-sketch b{font:15px monospace}.screen-sketch:after{content:'';position:absolute;inset:50% 0 auto;transform:rotate(-29.4deg);border-top:1px solid var(--accent)}.screen-sketch i{position:absolute;right:3px;top:0;font:18px monospace;color:var(--accent)}
.breadcrumbs{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px;font-size:11px;color:var(--muted)}.breadcrumbs a:hover{color:var(--accent)}.tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 256px;gap:75px;margin-bottom:70px}.tool-heading{margin:34px 0 30px}.tool-heading h1{font:54px/1.07 var(--serif);letter-spacing:-.015em;overflow-wrap:anywhere;margin-bottom:14px}.tool-heading>p:last-child{font:13px monospace;color:var(--muted)}.tool-aside{padding-top:42px;min-width:0}.tool-aside h2{font:30px/1.1 var(--serif);margin-bottom:20px}.related-row{display:flex;justify-content:space-between;gap:14px;border-top:1px solid var(--rule);padding:14px 0;font-size:12px}.related-row:hover{color:var(--accent)}.sidebar-note{border:1px solid var(--rule);padding:25px;margin-block:35px}.sidebar-note>span{font:54px var(--serif);font-style:italic;color:var(--accent)}.sidebar-note h3{font:24px/1.2 var(--serif)}.sidebar-note p{font-size:12px;color:var(--muted);margin:0}
.calculator{border:1px solid var(--ink);border-top:4px solid var(--ink);padding:30px;background:#fcfbf7}.calc-topline{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:26px}.calc-topline h2{font:26px var(--serif);margin:0}.precision{font-size:11px;display:flex;gap:10px;align-items:center}.precision select{background:transparent;border:0;border-bottom:1px solid var(--rule);min-height:36px;padding:4px 8px}.converter-grid{display:grid;grid-template-columns:minmax(0,1fr) 44px minmax(0,1fr);gap:14px;align-items:center}.field{min-width:0}.field>label{display:block;font-size:12px;line-height:1.45;margin-bottom:10px;color:var(--muted)}.input-wrap{display:flex;background:var(--paper);border:1px solid var(--rule);min-width:0}.input-wrap input{width:100%;min-width:0;border:0;background:transparent;padding:13px;font:28px/1.2 var(--serif);height:58px;direction:ltr;text-align:start}.input-wrap input[type=date],.input-wrap input[type=datetime-local]{font:15px var(--sans);padding:12px 8px}.input-wrap select,.unit-field select{width:100%;max-width:100%;background:var(--paper);font-size:12px;border:1px solid var(--rule);padding:10px;min-height:44px}.unit-field select{margin-top:8px}.input-wrap select{border:0;min-height:58px}.swap{border:1px solid var(--rule);width:44px;height:44px;font-size:24px;margin-top:27px}.swap:hover{background:var(--pale);color:var(--accent)}.calc-output{margin-top:25px;border-top:1px solid var(--ink);border-bottom:1px solid var(--rule);padding:20px 0;overflow-wrap:anywhere}.calc-output dl{margin:0}.calc-output dl>div{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-block:4px}.calc-output dt{font-size:12px;color:var(--muted)}.calc-output dd{margin:0;font:32px/1.3 var(--serif);font-variant-numeric:tabular-nums}.calc-output>p{font-size:11px;margin:12px 0 0}.calc-output[role=alert]{color:var(--accent);font-size:14px}.calc-note{font-size:11px;line-height:1.65;color:var(--muted);margin-top:15px}.calc-note p{margin:6px 0 0}.multi-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:21px}.calc-button{background:var(--ink);color:var(--paper);padding:10px 28px;border:1px solid var(--ink);font-size:13px;margin-top:24px;min-height:44px}.calc-button:hover{background:var(--accent);border-color:var(--accent)}
.content-section{margin-top:43px;padding-top:28px;border-top:1px solid var(--ink)}.content-section h2{font:35px var(--serif);margin-bottom:23px}.content-section h3{font:25px var(--serif);margin-block:25px 16px}.formula-card{background:var(--pale);padding:22px;font:16px/1.65 monospace;overflow-wrap:anywhere;direction:ltr;unicode-bidi:isolate}.formula-expression{font-family:monospace;direction:ltr;unicode-bidi:isolate;overflow-wrap:anywhere}.unit-symbol{direction:ltr;unicode-bidi:isolate}.steps-list{padding-inline-start:25px;font-size:13px}.steps-list li{padding-inline-start:8px;margin-bottom:18px}.steps-list li::marker{color:var(--accent);font-family:monospace}.steps-list p{margin:8px 0}.steps-list dl{margin:8px 0}.steps-list dt{color:var(--muted);font-size:11px}.steps-list dd{margin:0}.reference-table{overflow-x:auto}.reference-table table{border-collapse:collapse;width:100%;font-size:13px}.reference-table th{text-align:start;font-size:11px;font-weight:400;padding:12px 10px;border-bottom:2px solid var(--ink);color:var(--muted)}.reference-table td{padding:13px 10px;border-bottom:1px solid var(--rule);vertical-align:top;overflow-wrap:anywhere}.reference-table dl,.example-grid dl{margin:0}.reference-table dt,.example-grid dt{font-size:10px;color:var(--muted)}.reference-table dd,.example-grid dd{margin:0 0 7px}.definition-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:25px}.definition-grid h3{font-size:23px;margin-block:0 10px}.definition-grid p{font-size:12px;line-height:1.75;margin:9px 0;overflow-wrap:anywhere}.source-link{font-size:12px;text-decoration:underline;color:var(--accent)}.example-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.example-grid>div{border-top:2px solid var(--rule);padding-top:15px;min-width:0;overflow-wrap:anywhere}.example-grid h3{font-size:23px;margin:0 0 15px}.example-grid p{font-size:12px;line-height:1.7}
.section-intro{max-width:850px;padding-block:66px 45px}.section-intro h1{font:72px/1.05 var(--serif);margin:15px 0 0}.section-intro+.guide-index{margin-bottom:90px}.reading-page{max-width:820px;margin:45px auto 85px}.back-link{font-size:12px;color:var(--muted);display:inline-block;margin-bottom:44px}.reading-page h1{font:64px/1.05 var(--serif);letter-spacing:-.015em;margin-bottom:27px}.article-dek{font:22px/1.55 var(--serif);color:#52625f;margin-bottom:40px;max-width:700px}.article-body{font-size:16px;line-height:1.9;max-width:700px}.article-body h2{font:34px/1.15 var(--serif);margin-top:38px;margin-bottom:20px}.article-body p{margin-bottom:22px}.article-body a{text-decoration:underline;text-underline-offset:3px;color:var(--accent)}.article-body ul,.article-body ol{padding-inline-start:25px}.article-reference{border-top:1px solid var(--ink);margin-top:45px;padding-top:25px;max-width:700px}.article-reference h2{font:26px var(--serif)}.article-reference ul{padding-inline-start:20px;font-size:12px;margin-bottom:35px}.article-reference li{margin-bottom:8px}.article-reference a:hover{color:var(--accent)}
.site-footer{border-top:1px solid var(--ink);display:grid;grid-template-columns:1fr 1fr auto;align-items:start;gap:25px;padding-block:38px 45px;margin-top:35px}.site-footer .wordmark{font-size:37px}.site-footer p{font-size:12px;margin-bottom:10px}.site-footer span:not(.wordmark):not(.wordmark span){font-size:11px;color:var(--muted)}.site-footer nav{display:grid;grid-template-columns:repeat(2,auto);gap:9px 25px;font-size:11px}.site-footer nav a:hover{color:var(--accent)}[dir=rtl] .wordmark{direction:ltr}[dir=rtl] .overline{letter-spacing:0}[dir=rtl] .hero-copy h1,[dir=rtl] .reading-page h1{letter-spacing:0;line-height:1.25}
@media(min-width:1500px){.masthead,main,.site-footer{max-width:1450px}}
@media(max-width:1100px){.masthead,main,.site-footer{padding-inline:32px}.masthead{gap:22px}.masthead nav{gap:15px}.wordmark{font-size:43px}.frontispiece{gap:40px;grid-template-columns:1.4fr .8fr}.directory-layout{grid-template-columns:185px 1fr;gap:32px}.tool-grid{column-gap:20px}.tool-layout{gap:38px;grid-template-columns:minmax(0,1fr) 220px}.tool-heading h1{font-size:46px}.guide-index{gap:24px}.guide-preview h3{font-size:29px}.hero-copy h1{font-size:68px}}
@media(max-width:800px){.masthead{height:auto;min-height:106px;flex-wrap:wrap;gap:14px;padding-block:20px}.masthead .brand{margin-inline-end:auto}.masthead nav{order:3;width:100%;justify-content:space-between;margin:0;border-top:1px solid var(--rule);padding-top:10px;font-size:12px}.language{padding-inline-start:14px}.frontispiece{gap:28px;padding-block:42px;grid-template-columns:1.45fr 1fr}.hero-copy h1{font-size:54px}.intro{font-size:13px}.measure-plate{padding:20px}.plate-number{font-size:86px}.plate-equation{font-size:23px}.directory-layout{display:block}.directory-index{position:static;flex-direction:row;overflow-x:auto;gap:25px;border-block:1px solid var(--rule);margin-bottom:30px;padding-block:5px}.directory-index button{border:0;flex-shrink:0;max-width:195px;gap:9px;align-items:center}.directory-index button:last-child{border:0}.tool-layout{display:block}.tool-aside{border-top:1px solid var(--ink);padding-top:25px;margin-top:45px}.sidebar-note{display:none}.tool-aside>div:first-child{max-width:650px}.guide-index{gap:20px}.guide-figure{height:145px;gap:15px}.figure-big{font-size:54px}.screen-sketch{width:130px}.guide-preview h3{font-size:26px}.guide-preview>p{font-size:12px}.site-footer{grid-template-columns:1fr 1fr}.site-footer nav{grid-column:1/-1;display:flex;flex-wrap:wrap}.reading-page h1{font-size:52px}.section-intro h1{font-size:58px}}
@media(max-width:560px){.masthead,main,.site-footer{padding-inline:21px}.wordmark{font-size:39px}.masthead{padding-block:18px 10px;gap:14px}.language{border:0;padding:0}.language select{max-width:118px;font-size:12px}.frontispiece{display:block;padding-block:35px 38px}.hero-copy .overline{font-size:9px;margin-bottom:19px}.hero-copy h1{font-size:55px;line-height:1.02;letter-spacing:-.025em}.intro{font-size:13px;margin-top:20px}.measure-plate{transform:none;margin-top:30px;max-width:none;display:grid;grid-template-columns:1fr 1fr;gap:5px 20px;padding:17px 20px}.plate-top{grid-column:1/-1;font-size:10px}.ruler{display:none}.plate-number{font-size:66px;margin:12px 0 0}.plate-number>span{font-size:29px}.plate-equation{font-size:25px;align-self:center;margin-top:20px}.measure-plate>a{grid-column:1/-1;margin-top:8px;padding:12px 0 0}.measure-plate>p{display:none}.directory{padding-top:25px}.directory-head{display:block;margin-bottom:25px}.directory-head h2{font-size:36px}.search{max-width:none;width:100%;margin-top:20px}.directory-index{gap:22px;margin-bottom:24px}.directory-index button{font-size:12px;max-width:175px}.tool-grid{grid-template-columns:1fr}.tool-card{padding-block:15px}.tool-card strong{font-size:14px}.tool-card small{font-size:10px}.group-title h3{font-size:28px}.tool-group{margin-bottom:35px}.guide-index{grid-template-columns:1fr;gap:32px}.guide-preview{display:grid;grid-template-columns:110px minmax(0,1fr);gap:12px 18px}.guide-num{font-size:9px;top:8px;left:10px}.guide-figure{height:124px;margin:0;grid-row:1/4;gap:9px}.figure-big{font-size:36px}.figure-big>span{font-size:9px;margin-top:5px}.guide-figure>i{font-size:23px}.screen-sketch{width:80px}.screen-sketch b{font-size:11px}.guide-preview h3{font-size:26px;margin:0}.guide-preview>p{font-size:11px;line-height:1.65;margin:0}.read-link{font-size:11px;justify-self:start}.notes-section{padding-block:30px 25px}.notes-section .directory-head>a{display:inline-block;margin-top:20px}.tool-heading{margin-top:24px}.tool-heading h1{font-size:40px}.tool-heading .overline{font-size:9px}.calculator{padding:20px 16px}.calc-topline{gap:15px;align-items:start;margin-bottom:22px}.calc-topline h2{font-size:24px}.precision{font-size:10px;gap:5px;max-width:128px;line-height:1.5}.converter-grid{grid-template-columns:minmax(0,1fr) 34px minmax(0,1fr);gap:8px}.swap{width:34px;height:42px;font-size:22px}.input-wrap input{font-size:26px;padding:12px 10px}.field>label{font-size:11px;min-height:31px}.unit-field select{font-size:11px;padding:8px 3px}.calc-output dd{font-size:29px}.multi-fields{gap:16px 12px}.multi-fields .input-wrap input{font-size:24px}.multi-fields .input-wrap input[type=date],.multi-fields .input-wrap input[type=datetime-local]{font-size:11px}.multi-fields .input-wrap select{font-size:11px;padding:8px 5px}.content-section h2{font-size:31px}.formula-card{padding:16px;font-size:13px}.definition-grid{grid-template-columns:1fr;gap:20px}.example-grid{grid-template-columns:1fr;gap:20px}.example-grid>div{padding-top:16px}.reference-table th,.reference-table td{padding:10px 5px;font-size:11px}.reading-page{margin-top:28px;margin-bottom:45px}.back-link{margin-bottom:30px}.reading-page h1{font-size:45px}.article-dek{font-size:21px;line-height:1.5}.article-body{font-size:15px;line-height:1.85}.article-body h2{font-size:31px}.section-intro{padding-block:38px}.section-intro h1{font-size:47px}.site-footer{display:flex;flex-direction:column;gap:24px;padding-block:30px}.site-footer .wordmark{font-size:38px}.site-footer nav{gap:10px 22px}.site-footer p{margin-bottom:6px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* 2.0.1: readable reflow, not merely containment. Keep the editorial identity. */
.tool-main,.hero-copy,.reading-page,.article-body{min-width:0}
h1,h2,h3{hyphens:auto;overflow-wrap:break-word}
.hero-copy h1,.reading-page h1,.section-intro h1{overflow-wrap:anywhere}
.calc-topline{flex-wrap:wrap}
.precision{font-size:14px;max-width:100%;flex-wrap:wrap;gap:8px}
.precision select{font-size:16px;min-height:44px;flex:0 0 60px}
.field>label{font-size:14px;min-height:0}
.input-wrap select,.unit-field select{font-size:16px;line-height:1.5;padding:12px 10px}
.input-wrap input[type=date],.input-wrap input[type=time]{font:16px var(--sans);padding:12px 8px;min-width:0;max-width:100%}
.multi-fields{grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:24px}
.multi-fields .wide-field{grid-column:1/-1}
.datetime-parts{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));gap:14px;width:100%}
.datetime-parts label{display:block;font-size:14px;color:var(--muted);margin-bottom:8px}
.datetime-field>.input-wrap{border:0;background:none}
.datetime-parts input{border:1px solid var(--rule);background:var(--paper)}
.selection-text{display:block;font-size:14px;line-height:1.6;margin-top:8px;overflow-wrap:break-word;hyphens:auto}
.calc-output dd{max-width:100%;min-width:0;overflow-x:auto;overflow-wrap:normal}
.calc-output dl>div{min-width:0}
.calc-output dt{font-size:14px}
.calc-output>p,.calc-note,.sidebar-note p{font-size:14px;line-height:1.7}
.steps-list{font-size:15px}.steps-list dt{font-size:13px}
.definition-grid p,.example-grid p{font-size:15px;line-height:1.75}
.reference-table{outline-offset:4px}
.reference-table table{font-size:14px}
.reference-table th{font-size:13px;min-width:130px}
.reference-table td{font-size:14px;overflow-wrap:normal;white-space:nowrap}
.reference-table dt,.example-grid dt{font-size:13px;line-height:1.6}
.reference-table dd,.example-grid dd{font-size:14px;line-height:1.7;overflow-wrap:normal}
.reference-table .detail-table td{white-space:normal}
.formula-card,.formula-expression{overflow-wrap:normal;overflow-x:auto;max-width:100%}
.unit-symbol{white-space:nowrap}
.example-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,250px),1fr))}
.example-grid>div{overflow-wrap:normal}.example-grid dd{overflow-x:auto}
.guide-index{grid-template-columns:repeat(auto-fit,minmax(min(100%,290px),1fr));gap:36px}
.guide-preview{display:flex;flex-direction:column}
.guide-preview h3{font-size:30px;line-height:1.2;margin-bottom:14px}
.guide-preview>p{font-size:15px;line-height:1.75;margin-bottom:18px}
.guide-figure{height:170px;margin-bottom:22px;gap:24px}
.guide-num{top:14px;left:16px;font-size:11px}
.figure-big{font-size:64px}.figure-big>span{font-size:13px}
.guide-figure>i{font-size:32px}.screen-sketch{width:150px}
.read-link{font-size:14px;min-height:36px}
.related-row{font-size:14px;line-height:1.6}
.tool-card small{font-size:12px;line-height:1.6}
.site-footer nav,.site-footer p{font-size:14px}
@media(max-width:1100px){
 .tool-layout{display:block}.tool-aside{padding-top:28px;margin-top:44px;border-top:1px solid var(--ink)}
 .tool-aside>div:first-child{max-width:700px}.sidebar-note{display:none}
}
@media(max-width:800px){
 .frontispiece{grid-template-columns:1fr;gap:30px}.measure-plate{transform:none}
 .hero-copy h1{font-size:clamp(32px,8.6vw,64px);line-height:1.12}
 .intro{font-size:16px;line-height:1.7}
 .converter-grid{grid-template-columns:1fr;gap:16px}
 .swap{width:48px;height:48px;margin:0;justify-self:center;transform:rotate(90deg)}
 .field>label{font-size:14px;min-height:0;margin-bottom:8px}
 .unit-field select,.multi-fields .input-wrap select{font-size:16px;padding:12px 10px}
 .multi-fields .input-wrap input[type=date],.multi-fields .input-wrap input[type=time]{font-size:16px}
 .calc-topline{flex-direction:column;gap:18px;align-items:flex-start}
 .precision{font-size:14px;max-width:100%}
 .example-grid{grid-template-columns:1fr}
 .reading-page h1,.section-intro h1{font-size:clamp(32px,7vw,52px);line-height:1.16}
}
@media(max-width:700px){
 .reference-table .detail-table,.detail-table tbody,.detail-table tr,.detail-table td{display:block;width:100%}
 .detail-table thead{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
 .detail-table tr{border-top:2px solid var(--ink);padding-block:16px;margin-bottom:24px}
 .reference-table .detail-table td{padding:8px 0;border:0;min-width:0}
 .detail-table td::before{content:attr(data-label);display:block;font-size:16px;color:var(--ink);margin-bottom:12px}
 .detail-table dd{overflow-x:auto;max-width:100%;margin-bottom:14px}
}
@media(max-width:560px){
 .masthead,main,.site-footer{padding-inline:18px}
 .masthead nav{font-size:14px;gap:14px;align-items:start}
 .masthead nav a{min-width:0;overflow-wrap:break-word}
 .language select{font-size:16px;max-width:150px}
 .hero-copy h1{font-size:clamp(32px,8.6vw,48px);line-height:1.12;letter-spacing:-.015em}
 .calculator{padding:20px 14px}.calc-topline h2{font-size:26px}
 .multi-fields{grid-template-columns:1fr}
 .input-wrap input{font-size:28px}
 .calc-output dl>div{display:block;margin-block:12px}
 .calc-output dd{font-size:26px;line-height:1.4;margin-top:6px}
 .calc-button{font-size:16px;max-width:100%}
 .formula-card{font-size:14px;padding:16px}
 .reference-table th,.reference-table td{padding:12px 8px;font-size:14px}
 .guide-index{gap:38px}.guide-preview h3{font-size:28px;line-height:1.2}
 .guide-preview>p{font-size:15px;line-height:1.75}
 .guide-figure{height:150px;margin-bottom:18px}
 .article-body{font-size:16px;line-height:1.85}
 .article-body h2{font-size:28px;line-height:1.25}
 .search input{font-size:16px}
 .definition-grid h3{overflow-wrap:break-word}
}