:root{--ink:#193239;--muted:#536568;--blue:#1d6265;--line:#d8e1df;--pale:#f0f5f2;--white:#fff;--radius:10px;font-family:Arial,Helvetica,sans-serif;color:var(--ink);font-size:16px;line-height:1.65;background:#fff;color-scheme:light}

*{box-sizing:border-box}
body{margin:0}
a{color:var(--blue);text-underline-offset:4px}
a:hover{text-decoration-thickness:2px}
button,input,select{font:inherit}
button,a,input,select,summary{-webkit-tap-highlight-color:transparent}
button{cursor:pointer}
button:disabled{cursor:not-allowed;opacity:.5}
input,select{width:100%;min-width:0}
input,select,button{min-height:44px}
input,select{border:1px solid #99aaa9;border-radius:7px;padding:10px 12px;background:#fff;color:var(--ink)}
input:focus,select:focus{border-color:var(--blue)}
:focus-visible{outline:3px solid #b26c1b;outline-offset:4px}
button{border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--ink);padding:8px 14px}
h1,h2,h3,p{margin:0 0 16px}
h1,h2,h3{line-height:1.2;letter-spacing:-.025em;text-wrap:balance}
h1{font-size:clamp(2.25rem,4vw,3.7rem);font-weight:650}
h2{font-size:clamp(1.6rem,2.5vw,2.15rem);font-weight:650}
h3{font-size:1.2rem;font-weight:650}
p:last-child{margin-bottom:0}
svg{max-width:100%}
figure{margin:0}
table{border-collapse:collapse;width:100%;font-size:.9rem}
caption{text-align:left;color:var(--muted);padding:16px 0;font-size:.82rem}
th,td{text-align:left;vertical-align:top;padding:14px 16px;border-bottom:1px solid var(--line)}
th{font-weight:600}
td.numeric{font-variant-numeric:tabular-nums}
th small{display:block;font-weight:400;color:var(--muted);margin-top:2px}
thead{background:var(--pale)}
[hidden]{display:none!important}
.icon{width:26px;height:26px;flex-shrink:0}
hr{border:0;border-top:1px solid var(--line);margin:28px 0}
section[id],div[id],dl[id]{scroll-margin-top:24px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.skip{position:absolute;left:18px;top:-100px;z-index:10;background:#fff;padding:10px}
.skip:focus{top:8px}
.eyebrow{font-size:.7rem;letter-spacing:.13em;text-transform:uppercase;font-weight:700;color:var(--blue);margin-bottom:14px}
.lead{font-size:1.1rem;color:var(--muted);max-width:680px;line-height:1.75}
.caption,figcaption{font-size:.78rem;color:var(--muted);margin-top:10px}
.status{min-height:24px;font-size:.82rem;color:var(--muted);margin-top:10px}
.error{color:#a12726;font-weight:600;font-size:.9rem}
.error:empty{display:none}
.button{display:inline-flex;align-items:center;justify-content:center;gap:12px;text-decoration:none;border-radius:7px;padding:12px 18px;font-weight:600;font-size:.87rem;min-height:48px}
.primary{background:var(--blue);color:#fff;border:1px solid var(--blue)}
.primary:hover{background:#174d50}
.secondary{background:white;border:1px solid var(--line);color:var(--ink)}
.text-link{display:inline-flex;align-items:center;justify-content:space-between;gap:18px;font-size:.86rem;font-weight:600;text-decoration:none}
.text-link:hover{text-decoration:underline}
.text-button{background:none;border:0;padding:0;text-decoration:underline;text-underline-offset:4px;font-size:.85rem;justify-self:start}

.container{max-width:1232px;margin:0 auto;padding:0 40px 88px}
.site-header{background:#fff;border-bottom:1px solid var(--line)}
.header-inner{max-width:1232px;padding:20px 40px;display:flex;align-items:center;justify-content:space-between;margin:auto;gap:24px}
.brand{display:inline-flex;gap:10px;align-items:center;color:var(--ink);font-weight:700;font-size:1.2rem;text-decoration:none;letter-spacing:-.045em;flex-shrink:0}
.brand-icon{background:var(--ink);border-radius:6px;color:#fff;display:flex;align-items:center;justify-content:center;width:34px;height:34px}
.brand-icon .icon{width:22px;height:22px}
.site-header nav{display:flex;align-items:center;gap:22px}
.site-header nav a{font-size:.82rem;font-weight:600;text-decoration:none;color:var(--muted);padding:8px 0;white-space:nowrap}
.site-header nav a[aria-current],.site-header nav a:hover{color:var(--blue)}
.site-header nav a[aria-current]{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:8px}
.menu-button{display:none}
.nojs-nav{display:flex;gap:22px;justify-content:center;flex-wrap:wrap;padding:18px;background:var(--pale);font-size:.85rem}
.page-intro{padding:46px 0 30px;max-width:860px}
.page-intro h1{margin-bottom:20px}
.breadcrumbs{display:flex;align-items:center;flex-wrap:wrap;gap:6px 10px;font-size:.75rem;margin:25px 0 -22px;color:var(--muted)}
.breadcrumbs a{text-decoration:none}
.breadcrumbs>span:last-child{overflow-wrap:anywhere}
.section{margin-top:64px}
.section-heading{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:28px}
.section-heading h2{margin:0}
.section-heading>a{font-size:.85rem;flex-shrink:0}
.section-heading>p{font-size:.82rem;color:var(--muted);margin:0}
.tool-grid,.guide-grid,.blog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.explain-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:64px}
.explain-grid>div>p{color:#3e5357;font-size:.97rem}
.explain-grid h3{margin-top:28px}

.home-heading{padding:32px 0 24px}
.home-heading h1{font-size:clamp(1.9rem,3.3vw,2.75rem);margin-bottom:12px}
.home-heading>p{color:var(--muted);margin-bottom:16px;font-size:1rem}
.page-links{display:flex;flex-wrap:wrap;gap:6px 22px;font-size:.86rem}
.page-links a{padding:4px 0;text-decoration:none}
.page-links a:hover{text-decoration:underline}
.home-converters{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:start}
.home-converters .quick-converter{padding:22px 24px;border-radius:8px;box-shadow:none;border-top:3px solid var(--blue)}
.home-converters .quick-heading{margin-bottom:18px}
.home-converters .quick-heading h2{font-size:1.25rem}
.home-converters .quick-grid{grid-template-columns:1fr;gap:12px}
.home-converters .fields{gap:14px}
.home-converters .ppi-choice{margin-top:-2px}
.home-converters .hint{margin-bottom:0}
.home-converters .converter-options{margin:4px 0 0}
.home-converters .converter-options summary{padding:4px 0;min-height:32px}
.home-converters .quick-result{padding:18px 20px;border:0;border-radius:5px;background:#edf5f1}
.home-converters .quick-result h3{font-size:2.3rem;margin-bottom:6px}
.home-converters .quick-result .eyebrow{font-size:.64rem;margin-bottom:8px}
.home-converters .quick-result .result-actions{margin-top:12px}
.home-converters .result-actions button{min-height:36px;padding:5px 12px;font-size:.78rem}
.home-converters .quick-result .status{min-height:22px;margin-top:6px;font-size:.75rem}
.home-converters .preset-row button{padding:5px 12px;min-height:36px}
.conversion-note{font-size:.85rem;color:var(--muted);border-left:3px solid #a5bdb3;padding:4px 0 4px 14px;margin:20px 0 10px;max-width:970px}
.full-image-link{font-size:.85rem;margin-bottom:0;color:var(--muted)}
.home-content{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:44px;margin-top:40px;align-items:start}
.home-main{min-width:0}
.home-section{margin:0 0 40px;padding-top:32px;border-top:1px solid var(--line)}
.home-section h2{font-size:1.55rem;margin-bottom:14px}
.home-section h3{font-size:1.08rem;line-height:1.4}
.home-section>p{font-size:.95rem;line-height:1.8}
.home-section p{color:#41575b}
.home-section-title{display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;align-items:baseline;margin-bottom:6px}
.home-section-title>a{font-size:.82rem}
.home-section .table-scroll{margin:18px 0;max-height:none;border:1px solid var(--line);border-radius:6px}
.home-section .table-scroll caption{padding:10px 14px;background:#fafcfb}
.home-section th,.home-section td{padding:10px 12px;font-size:.84rem}
.home-section tbody tr:nth-child(even){background:#f8faf9}
.comparison-panel{padding-top:0;border-top:0}
.comparison-controls{display:grid;grid-template-columns:minmax(0,1fr) 170px auto;align-items:end;gap:12px;margin-top:20px}
.comparison-controls button{font-size:.8rem}
.comparison-panel .table-scroll table{min-width:530px}
.comparison-panel .button{font-size:.8rem;min-height:42px;padding:8px 14px}
.home-formulas{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:24px 0}
.home-formulas section{background:#f4f7f5;border:1px solid var(--line);padding:20px;border-radius:6px;min-width:0}
.home-formulas h3{margin-bottom:12px}
.home-formulas p{font-size:.85rem}
.formula-box{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.95rem!important;font-weight:600;color:var(--blue)!important;overflow-wrap:anywhere}
.home-section .home-source{font-size:.8rem;color:var(--muted)}
.home-reading{display:grid;gap:0}
.home-reading article{padding:18px 0;border-bottom:1px solid var(--line)}
.home-reading article:last-child{border:0;padding-bottom:0}
.home-reading h3{margin-bottom:6px}
.home-reading h3 a{text-decoration:none}
.home-reading h3 a:hover{text-decoration:underline}
.home-reading p{font-size:.9rem;line-height:1.7}
.home-sidebar{display:grid;gap:24px;min-width:0}
.sidebar-box{border:1px solid var(--line);border-radius:6px;padding:20px}
.sidebar-box h2,.sidebar-note h2{font-size:.95rem;margin-bottom:16px;letter-spacing:0}
.sidebar-box p,.sidebar-note p{font-size:.82rem;color:var(--muted)}
.sidebar-box>a{display:block;padding:10px 0;border-top:1px solid var(--line);font-size:.84rem;text-decoration:none;line-height:1.5}
.sidebar-box>a:hover{text-decoration:underline}
.sidebar-equation{font-size:.94rem!important;color:var(--ink)!important;font-weight:600;padding-bottom:14px;border-bottom:1px solid var(--line)}
.sidebar-equation span{display:block;font-size:.75rem;font-weight:400;color:var(--muted)}
.sidebar-note{padding:0 8px}
.sidebar-note>a{display:block;font-size:.8rem;margin-top:10px}
.ad-slot{margin:36px 0;padding:20px 0;border-block:1px solid var(--line);text-align:center}
.ad-slot>span{display:block;font-size:.68rem;color:var(--muted);margin-bottom:10px}
.ad-slot-content{min-height:250px}
.ad-slot-sidebar{width:100%;max-width:300px}
@media(max-width:1000px){.home-content{grid-template-columns:minmax(0,1fr) 230px;gap:28px}.comparison-controls{grid-template-columns:1fr 150px}.comparison-controls>button{grid-column:1/-1;justify-self:start}.home-formulas{grid-template-columns:1fr}.home-converters .preset-row button{font-size:.72rem;padding:5px 8px}}
@media(max-width:800px){.home-content{grid-template-columns:1fr;gap:12px}.home-sidebar{grid-template-columns:1fr 1fr}.home-formulas{grid-template-columns:1fr 1fr}.home-converters .quick-converter{padding:20px 18px}.home-converters{gap:16px}.home-converters .fields{gap:10px}.home-converters .quick-result{padding:18px}.home-converters .preset-row{gap:5px}}
@media(max-width:600px){.home-heading{padding:24px 0 20px}.home-heading>p{font-size:.92rem;line-height:1.6}.page-links{gap:4px 16px;font-size:.79rem}.home-converters{grid-template-columns:1fr}.home-converters .quick-converter{padding:18px}.home-converters .quick-heading{margin-bottom:14px}.home-converters .quick-result h3{font-size:2.15rem}.home-converters .quick-heading h2{font-size:1.2rem}.home-content{margin-top:32px}.home-section{margin-bottom:30px;padding-top:26px}.comparison-panel{padding-top:0}.home-section h2{font-size:1.4rem}.home-formulas{grid-template-columns:1fr;gap:12px}.home-sidebar{grid-template-columns:1fr}.comparison-controls{grid-template-columns:1fr 1fr}.home-section .table-scroll table{min-width:500px}.comparison-panel .table-scroll table{min-width:530px}.conversion-note,.full-image-link{font-size:.79rem}.home-converters .preset-row button{font-size:.73rem;padding:5px 9px}}
@media print{.home-sidebar,.comparison-controls,[data-comparison-csv],.ad-slot{display:none!important}.home-content{display:block}.home-section{break-inside:auto}.niche-home .table-scroll table{min-width:0}.home-section h2{break-after:avoid}}

.quick-converter{background:#fff;border:1px solid #c8d8d4;border-radius:10px;padding:28px 32px;scroll-margin-top:20px}
.quick-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:24px}
.quick-heading h2{font-size:1.5rem;margin:0}
.quick-heading .eyebrow{margin-bottom:8px}
.quick-heading>a{font-size:.82rem}
.quick-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:36px}
.quick-result{min-width:0;background:#edf4ef;border:1px solid #d3e1d6;padding:28px;border-radius:9px;align-self:stretch}
.quick-result h3{font-size:3rem;overflow-wrap:anywhere;line-height:1.15;font-variant-numeric:tabular-nums}
.quick-result>div>p:not(.eyebrow){font-size:.87rem;color:var(--muted)}
.quick-metrics{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:24px 0;padding-top:20px;border-top:1px solid #d2dfd7}
.quick-metrics dt{font-size:.77rem;color:var(--muted)}
.quick-metrics dd{margin:3px 0 0;font-weight:600;font-size:1rem;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.quick-result .result-actions{margin-top:24px}
.quick-result .status{margin-bottom:0}
.converter-options{margin:14px 0 0}
.converter-options summary{font-size:.82rem;cursor:pointer;min-height:44px;padding:8px 0}
.converter-options[open] summary{margin-bottom:12px}
.quick-grid form>.fields+.fields{margin-top:18px}
.ppi-choice{margin-top:-9px}
.ppi-choice .preset-row{margin:0 0 6px}
.conversion-table{border-top:1px solid var(--line);padding-top:14px;margin-top:22px}
.conversion-table>summary{font-size:.87rem;font-weight:600;cursor:pointer;min-height:44px;padding:8px 0}
.conversion-table .table-scroll{max-height:440px}
.conversion-table>button{font-size:.8rem}
.conversion-table .hint{max-width:750px}
.preset-row{display:flex;flex-wrap:wrap;gap:7px;margin:12px 0}
.preset-row button{font-size:.76rem;padding:5px 11px;min-height:38px;border-color:#b7ceca}
.preset-row button[aria-pressed=true]{background:var(--blue);border-color:var(--blue);color:white}
.preset-panel{border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:22px}
.preset-panel>button{margin-top:10px;font-size:.8rem}
.preset-panel>.hint{margin-top:12px}
input[readonly]{background:#edf1f0;color:#45595b}
.jump-nav{display:flex;flex-wrap:wrap;gap:10px 24px;margin:0 0 26px;padding-bottom:18px;border-bottom:1px solid var(--line);font-size:.82rem}
.jump-nav a{text-decoration:none}
.image-heading{margin-top:48px}
.calculator{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;box-shadow:0 8px 28px #19323904}
.calculator-form{padding:30px;border-right:1px solid var(--line);min-width:0}
.panel-heading{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.panel-heading h2{font-size:1.12rem;letter-spacing:-.02em;margin:0}
.local-badge{font-size:.65rem;line-height:1.3;border:1px solid #c4dfd7;border-radius:20px;padding:5px 8px;color:#285d50;background:#f5fcf8}
.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 16px}
.field-wide{grid-column:1/-1}
.field label{display:block;font-size:.82rem;font-weight:600;margin-bottom:6px}
.field label span{float:right;font-weight:400;color:var(--muted)}
.field input{font-size:1.1rem;font-variant-numeric:tabular-nums}
.field select{font-size:.85rem}
.hint{font-size:.76rem;color:var(--muted);line-height:1.55;margin-top:7px}
.number-help{font-size:.75rem;color:var(--muted);line-height:1.55;margin:18px 0}
.calculate-button{width:100%;justify-content:space-between;font-weight:600}
.form-secondary{display:flex;gap:16px;justify-content:center;margin-top:10px}
.form-secondary button{font-size:.8rem;background:none;border:0;text-decoration:underline;text-underline-offset:3px;padding:8px}
.calculator-result{padding:30px;background:#f1f6f3;min-width:0}
.result-heading .eyebrow{display:block;margin-bottom:12px}
.result-heading h2{font-size:clamp(1.5rem,3vw,2.15rem);font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.result-heading>p{font-size:.86rem;color:var(--muted);margin-top:-3px}
.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:22px 0}
.metrics div{min-width:0;padding:0 10px 0 0;border-right:1px solid #cbdcd2}
.metrics div:last-child{border:0;padding:0}
.metrics dt{font-size:.72rem;color:var(--muted);margin-bottom:5px;line-height:1.5}
.metrics dd{font-size:.84rem;font-weight:600;line-height:1.5;margin:0;overflow-wrap:anywhere}
.result-figure{margin-top:22px}
.dimension-diagram{display:block;width:100%;height:auto}
.result-figure .dimension-diagram{border-radius:6px;max-height:270px;border:1px solid #d4e2dd}
.result-figure figcaption{text-align:center}
.result-notes{font-size:.82rem;color:#455c60;margin-top:16px}
.result-notes p{margin-bottom:8px}
.result-details{margin-top:20px;border-top:1px solid var(--line);padding-top:12px;font-size:.84rem}
.result-details summary{cursor:pointer;min-height:36px}
.result-details table{font-size:.78rem;table-layout:fixed}
.result-details th,.result-details td{padding:8px 4px;overflow-wrap:anywhere}
.result-details th{width:60%;font-weight:400}
.result-details td{text-align:right;font-variant-numeric:tabular-nums}
.result-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.result-actions button{padding:6px 10px;font-size:.76rem;min-height:42px;border-color:#b9cdc5;background:#ffffffc9}
.empty-result{min-height:310px;display:flex;flex-direction:column;justify-content:center;align-items:start}
.empty-result h2{font-size:1.7rem}
.empty-result p{font-size:.95rem;color:var(--muted)}
.file-picker{border:1px dashed #92b2a5;border-radius:8px;background:#f2f7f3;padding:16px;margin-bottom:24px}
.file-picker label{display:block;font-size:.9rem;font-weight:600;margin-bottom:10px}
.file-picker input{padding:0;border:0;background:transparent;font-size:.74rem;min-height:35px}
.file-picker input::file-selector-button{padding:8px;border:1px solid #adbfba;border-radius:4px;margin-right:8px;color:var(--ink);background:#fff}
.file-picker p{font-size:.76rem;color:var(--muted);margin:8px 0 0;overflow-wrap:anywhere}
.equivalence-table{margin-top:18px;font-variant-numeric:tabular-nums}
.equivalence-table td{text-align:right;font-weight:600}

.tool-card{display:flex;flex-direction:column;padding:26px;background:#fff;border:1px solid var(--line);border-radius:10px;text-decoration:none;color:var(--ink);transition:transform .15s,border-color .15s}
.tool-card:hover{transform:translateY(-3px);border-color:#809f94;box-shadow:0 8px 22px #16305a08}
.card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px;color:var(--blue)}
.card-top span{font-size:.66rem;color:var(--muted);letter-spacing:.055em;text-transform:uppercase}
.tool-card p{font-size:.9rem;color:var(--muted);margin-bottom:24px}
.card-action{margin-top:auto;display:flex;justify-content:space-between;color:var(--blue);font-size:.82rem;font-weight:600}
.formula{padding:20px;border-left:3px solid var(--blue);background:#eef4f1;font-family:Consolas,monospace;font-size:.9rem;line-height:1.8;overflow-wrap:anywhere}
.formula-panel{padding:24px;background:#eff3ec;border:1px solid var(--line);border-radius:10px;margin-top:26px}
.formula-panel .formula{font-size:1.35rem;background:none;padding:0;border:0}
.formula-panel>p:last-child{font-size:.91rem}
.step-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.step-grid>div{border-top:1px solid var(--line);padding-top:20px}
.step-number{display:block;font-family:Georgia,serif;font-size:2rem;color:#597867;margin-bottom:18px}
.step-grid p{font-size:.94rem;color:var(--muted)}
.source-links{margin-top:36px}
.source-links h2,.source-links h3{font-size:1.15rem!important}
.source-links ul{padding-left:18px;font-size:.85rem}
.source-links li{padding-bottom:8px}
.source-links p{color:var(--muted);font-size:.82rem}
.source-links a{overflow-wrap:anywhere}
.related{background:#edf3ef;border:1px solid #dfe7e1;border-radius:10px;padding:28px;align-self:start}
.related h2{font-size:1.25rem}
.related p{font-size:.89rem;color:var(--muted)}
.related>a{display:flex;justify-content:space-between;gap:10px;padding:16px 0;border-bottom:1px solid #d3e0d8;font-size:.88rem;line-height:1.55}
.related>a:last-child{border:0}
.reference-panel{min-width:0;padding:26px;background:white;border:1px solid var(--line);border-radius:12px}
.reference-panel>h2{font-size:1.45rem}
.reference-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.table-scroll{overflow:auto;margin-bottom:20px;max-width:100%}
.table-scroll table{min-width:600px}
.table-scroll tbody tr:hover{background:#f5f9f6}
.reference-panel .table-scroll{max-height:640px}
.table-scroll thead{position:sticky;top:0}
.faq{max-width:870px}
.faq>details{border-bottom:1px solid var(--line);padding:16px 0}
.faq summary{cursor:pointer;font-weight:600;min-height:36px}
.faq details p{font-size:.96rem;color:var(--muted);margin:10px 0 4px;max-width:760px}
.search-controls{display:grid;grid-template-columns:2fr 1fr;gap:14px 24px;margin-bottom:32px;padding:24px;background:#eff3ef;border:1px solid var(--line);border-radius:10px}
.search-controls p{font-size:.81rem;color:var(--muted);margin:0}
.search-controls>p:first-of-type{grid-column:1}
.search-controls .text-button{justify-self:end}

.guide-card{color:var(--ink);text-decoration:none;display:flex;flex-direction:column;gap:20px}
.guide-card h3{font-size:1.25rem;line-height:1.3}
.guide-card p{font-size:.91rem;color:var(--muted);margin-bottom:18px}
.guide-card:hover h3{color:var(--blue)}
.guide-art{height:175px;border-radius:9px;background-color:#e8efea;background-image:linear-gradient(#ffffff80 1px,transparent 1px),linear-gradient(90deg,#ffffff80 1px,transparent 1px);background-size:22px 22px;display:flex;align-items:center;justify-content:space-evenly;color:#34625a;border:1px solid #d1e0d8}
.guide-art .icon{width:75px;height:75px;stroke-width:.7}
.guide-art span{font-size:.65rem;letter-spacing:.2em;writing-mode:vertical-rl}
.art-paper,.art-scale{background-color:#f5eadc;color:#785728;border-color:#e8dccb}
.art-screen,.art-ratio{background-color:#e2eee6;color:#32654a;border-color:#cddfd3}
.blog-card{min-width:0;display:flex;flex-direction:column}
.blog-card>a:first-child{display:block;text-decoration:none}
.blog-card h3{font-size:1.27rem;line-height:1.35;margin-bottom:12px}
.blog-card h3>a{color:var(--ink);text-decoration:none}
.blog-card h3>a:hover{color:var(--blue);text-decoration:underline}
.blog-card>p{font-size:.9rem;color:var(--muted);margin-bottom:18px}
.blog-card>.text-link{margin-top:auto;align-self:start}
.blog-grid{gap:42px 24px}
.post-meta{display:flex;justify-content:space-between;gap:12px;margin:18px 0 10px;font-size:.7rem;color:var(--muted)}
.post-meta>span:first-child{color:var(--blue);font-weight:600}
.editorial-art{height:208px;border-radius:9px;border:1px solid #d8e2d6;position:relative;overflow:hidden;background:#e8ede2;color:#3d6252;padding:18px 22px}
.art-label{display:block;font-size:.59rem;letter-spacing:.14em;font-weight:600}
.art-sheets{position:absolute;display:flex;justify-content:center;align-items:center;inset:42px 20px 35px}
.art-sheets>span{display:flex;justify-content:center;align-items:center;background:#fdfdf7;font-family:Georgia,serif;font-size:2.3rem;width:100px;height:105px;box-shadow:5px 6px 0 #173e3820;border:1px solid #bfcbb7;transform:rotate(-9deg)}
.art-sheets>span+span{transform:rotate(9deg);background:#3c6558;color:#fff;margin-left:-12px;margin-top:18px}
.art-rule{position:absolute;bottom:16px;left:22px;right:22px;display:flex;justify-content:space-between;align-items:center;font-size:.53rem;letter-spacing:.1em}
.art-rule .icon{width:18px;height:18px}
.visual-crop,.visual-scale,.visual-paper{background:#f3e9dc;border-color:#e8dcc8;color:#725735}
.visual-crop .art-sheets>span+span,.visual-scale .art-sheets>span+span,.visual-paper .art-sheets>span+span{background:#996446}
.visual-screen,.visual-css,.visual-ratio{background:#e6ebf1;border-color:#d6dee8;color:#47617a}
.visual-screen .art-sheets>span+span,.visual-css .art-sheets>span+span,.visual-ratio .art-sheets>span+span{background:#526d87}
.visual-screen .art-sheets>span{font-size:1.4rem}
.visual-check .art-sheets>span{font-size:1.15rem;font-family:Arial,sans-serif}
.editorial-note{display:flex;align-items:center;gap:16px;margin:0 0 30px;color:var(--muted);font-size:.87rem;padding-bottom:24px;border-bottom:1px solid var(--line)}
.resource-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.resource-card{display:flex;flex-direction:column;color:var(--ink);text-decoration:none;padding:32px;border:1px solid var(--line);border-radius:12px;background:#fff}
.resource-card>.icon{margin-bottom:25px;color:var(--blue);width:32px;height:32px}
.resource-card h2{font-size:1.5rem}
.resource-card p{font-size:.96rem;color:var(--muted);margin-bottom:24px}
.resource-card .text-link{margin-top:auto}
.resource-card:hover{border-color:#809f94}

.prose{max-width:790px;margin:0 auto}
.prose h2{font-size:1.5rem;margin-top:36px}
.prose p,.prose li{color:#3e5357}
.prose li{margin-bottom:12px}
.article-layout{display:grid;grid-template-columns:minmax(0,770px) minmax(0,260px);gap:64px}
.article-layout article{min-width:0}
.article-layout article section{margin-top:38px}
.article-layout article section h2{font-size:1.55rem;line-height:1.3}
.article-layout article section p{color:#3e5357;line-height:1.85}
.article-layout .page-intro h1{font-size:clamp(2rem,3.5vw,3rem)}
.article-aside{align-self:start;position:sticky;top:28px;margin-top:58px;background:#f0f4ed;border:1px solid var(--line);padding:24px;border-radius:10px}
.article-aside .icon{width:36px;height:36px;margin-bottom:20px}
.article-aside h2{font-size:1.3rem}
.article-aside p{font-size:.9rem;color:var(--muted)}
.article-aside a{display:block;font-size:.85rem;margin-top:14px;line-height:1.55}
.article-aside a.button{color:#fff;font-size:.79rem}
.article-aside ol{padding-left:18px;margin:0}
.article-aside li{padding:0 0 3px 4px;color:var(--muted);font-size:.8rem}
.article-aside li a{margin-top:12px}
.review-date{font-size:.8rem;color:var(--muted);margin-top:-10px}
.article-illustration{border:1px solid var(--line);border-radius:10px;overflow:hidden;max-width:600px}
.article-cta{background:#eef3eb;padding:30px;margin-top:38px;border-radius:10px}
.article-cta h2{font-size:1.4rem}
.article-cta>p:not(.eyebrow){font-size:.93rem;color:var(--muted)}
.article-cta .button{margin:6px 10px 0 0}
.unit-illustration{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:18px;padding:36px 20px;background:#eaf2f0;border:1px solid var(--line);border-radius:10px;font-size:1.8rem;font-variant-numeric:tabular-nums}
.unit-illustration small{flex-basis:100%;text-align:center;font-size:.8rem;color:var(--muted)}
.byline{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:.74rem;color:var(--muted);margin:-5px 0 24px}
.blog-article .editorial-art{height:250px}
.blog-article .art-sheets{inset:38px 20px 40px}
.blog-article .art-sheets>span{width:140px;height:140px;font-size:2.6rem}
.blog-article .visual-screen .art-sheets>span,.blog-article .visual-check .art-sheets>span{font-size:1.7rem}
.takeaway{padding:24px 26px;background:#f1f5ec;border-left:3px solid #64845c;margin-top:28px;border-radius:0 8px 8px 0}
.takeaway strong{font-size:.77rem;color:var(--blue);text-transform:uppercase;letter-spacing:.06em;display:block;margin-bottom:10px}
.takeaway p{font-size:.97rem;color:#3e5357}
.mobile-toc{display:none}
.article-toc{font-size:.9rem;padding:24px;background:var(--pale);border-radius:8px;margin-top:24px}
.article-toc ol{padding-left:20px;margin-bottom:0}
.article-toc li{padding:5px 0}
.glossary-jump{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:36px}
.glossary-jump a{font-size:.78rem;border:1px solid var(--line);border-radius:6px;padding:6px 10px;background:#fff;text-decoration:none}
.glossary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 44px}
.glossary>div{border-top:1px solid var(--line);padding-top:24px;scroll-margin-top:24px}
.glossary dt{font-size:1.15rem;font-weight:600;margin-bottom:12px;letter-spacing:-.025em}
.glossary dd{margin:0;color:var(--muted);font-size:.95rem}
.checklist-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:36px}
.checklist{padding:26px;border:1px solid var(--line);border-radius:12px;background:#fff}
.checklist-heading{border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:6px}
.checklist-heading h2{font-size:1.4rem}
.checklist-heading p{font-size:.84rem;color:var(--blue);margin-bottom:0}
.check-item{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line);align-items:start;cursor:pointer}
.check-item:last-child{border:0}
.check-item input{padding:0;width:20px;height:20px;min-height:20px;margin-top:3px;flex-shrink:0;accent-color:var(--blue)}
.check-item strong{display:block;font-size:.98rem;margin-bottom:6px}
.check-item>span>span{display:block;font-size:.9rem;color:var(--muted)}
.check-item:has(input:checked) strong{color:var(--blue)}
.checklist-actions{display:flex;flex-direction:column;gap:10px;margin:20px 0}
.checklist-aside{position:sticky;top:28px}

.site-footer{background:#f0f3ed;border-top:1px solid var(--line);padding:48px max(40px,calc((100% - 1152px)/2)) 24px}
.footer-top{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:28px;padding-bottom:40px}
.footer-brand p{font-size:.85rem;color:var(--muted);margin-top:12px}
.footer-top nav{display:flex;flex-direction:column;align-items:start;gap:10px}
.footer-top nav strong{font-size:.76rem;margin-bottom:6px}
.footer-top nav a{font-size:.81rem;text-decoration:none;color:var(--muted)}
.footer-top nav a:hover{text-decoration:underline}
.footer-bottom{border-top:1px solid var(--line);padding-top:22px;display:flex;justify-content:space-between;gap:20px;font-size:.73rem;color:var(--muted)}
.footer-bottom>div{display:flex;flex-wrap:wrap;gap:10px 20px}
.footer-bottom a{color:var(--muted)}

@media(max-width:1100px){.site-header nav{gap:15px}
.site-header nav a{font-size:.76rem}
.header-inner{gap:18px}
.article-layout{gap:32px;grid-template-columns:minmax(0,1fr) 230px}
.calculator-form,.calculator-result{padding:24px}
.quick-grid{gap:24px}
.container{padding-left:28px;padding-right:28px}
.header-inner{padding-left:28px;padding-right:28px}
}

@media(max-width:900px){.header-inner{flex-wrap:wrap;min-height:84px;gap:0}
.js .menu-button{display:flex;align-items:center;gap:14px;font-size:.85rem;background:transparent;border:0}
.site-header nav{display:none;flex-direction:column;flex-basis:100%;align-items:stretch;gap:6px;padding:16px 0 8px}
.site-header nav.open{display:flex}
.site-header nav a{font-size:.9rem;padding:10px 0;white-space:normal}
.tool-grid,.guide-grid,.blog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.blog-card:last-child:nth-child(3),.guide-card:last-child:nth-child(3){grid-column:1/-1;max-width:560px}
.explain-grid{gap:32px}
.article-layout{display:block}
.article-aside{position:static;margin-top:32px}
.blog-article .article-aside{display:none}
.mobile-toc{display:block}
.footer-top{grid-template-columns:1.3fr 1fr 1fr}
.footer-brand{grid-column:1/-1}
.footer-brand p:last-child{display:none}
.checklist-layout{grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:24px}
.checklist-aside{padding:20px}
.quick-converter{padding:25px}
.quick-result{padding:24px}
.reference-controls{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media(max-width:680px){.container{padding:0 20px 56px}
.header-inner{padding:15px 20px;min-height:74px}
.brand{font-size:1.1rem}
.quick-converter{padding:22px 20px}
.quick-heading{display:block;margin-bottom:20px}
.quick-heading>a{display:inline-block;margin-top:12px;font-size:.8rem}
.quick-heading h2{font-size:1.4rem}
.quick-grid{grid-template-columns:1fr;gap:22px}
.quick-result{padding:24px}
.quick-result h3{font-size:2.6rem}
.quick-grid .fields{gap:16px 12px}
.quick-grid select{font-size:.82rem;padding-left:8px}
.quick-metrics{gap:16px}
.section{margin-top:52px}
.section-heading{align-items:start;gap:16px;margin-bottom:24px}
.section-heading h2{font-size:1.6rem}
.section-heading>a{font-size:.77rem;text-align:right;max-width:92px;white-space:normal}
.step-grid{grid-template-columns:1fr;gap:16px}
.tool-grid,.guide-grid,.blog-grid{grid-template-columns:1fr;gap:30px}
.blog-card:last-child:nth-child(3),.guide-card:last-child:nth-child(3){grid-column:auto;max-width:none}
.editorial-art{height:210px}
.blog-card h3{font-size:1.3rem}
.guide-card{gap:16px}
.guide-art{height:160px}
.guide-card h3{font-size:1.3rem}
.page-intro{padding:34px 0 26px}
.page-intro h1{font-size:clamp(2rem,7.8vw,2.8rem)}
.lead{font-size:1rem}
.breadcrumbs{margin-top:20px;margin-bottom:-12px;font-size:.7rem}
.calculator{grid-template-columns:1fr}
.calculator-form{border-right:0;border-bottom:1px solid var(--line);padding:24px 20px}
.calculator-result{padding:24px 20px}
.panel-heading{margin-bottom:23px}
.fields{gap:18px 14px}
.field input{font-size:1.05rem}
.metrics{gap:10px}
.metrics dd{font-size:.84rem}
.result-heading h2{font-size:1.9rem}
.result-figure .dimension-diagram{max-height:250px}
.jump-nav{font-size:.77rem;gap:8px 18px}
.image-heading{display:block;margin-top:36px}
.image-heading>p{margin-top:10px}
.explain-grid{grid-template-columns:1fr;gap:32px}
.explain-grid h2{font-size:1.55rem}
.related{padding:24px}
.article-layout .page-intro h1{font-size:2.15rem}
.article-aside{padding:24px}
.article-aside .icon{display:none}
.article-layout article section h2{font-size:1.4rem}
.article-layout article section p{font-size:1rem;line-height:1.8}
.article-cta{padding:24px}
.article-illustration{margin-top:20px}
.blog-article .editorial-art{height:220px}
.blog-article .art-sheets>span{width:110px;height:120px;font-size:2rem}
.byline{font-size:.72rem;gap:7px 14px}
.takeaway{padding:21px}
.takeaway p{font-size:.94rem}
.reference-panel{padding:20px}
.reference-controls{gap:16px}
.table-scroll td,.table-scroll th{padding:12px}
.search-controls{padding:20px;gap:16px;grid-template-columns:1fr}
.search-controls .text-button{justify-self:start}
.resource-grid,.glossary{grid-template-columns:1fr;gap:22px}
.resource-card{padding:26px}
.glossary-jump{gap:7px}
.glossary-jump a{font-size:.74rem}
.glossary>div{padding-top:20px}
.checklist-layout{display:block}
.checklist{padding:20px}
.checklist-aside{position:static;margin-top:24px}
.check-item{gap:13px}
.check-item strong{font-size:.94rem}
.check-item>span>span{font-size:.86rem}
.prose h2{font-size:1.4rem}
.step-grid>div{display:grid;grid-template-columns:34px 1fr;gap:0 18px}
.step-grid .step-number{grid-row:1/3;font-size:1.5rem}
.step-grid h3{font-size:1.1rem}
.step-grid p{font-size:.9rem}
.formula-panel{padding:22px}
.formula-panel .formula{font-size:1.1rem}
.site-footer{padding:34px 20px 24px}
.footer-top{grid-template-columns:1fr 1fr;gap:28px 24px;padding-bottom:28px}
.footer-top nav:last-child{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:10px 24px}
.footer-top nav:last-child strong{grid-column:1/-1}
.footer-bottom{flex-direction:column;gap:12px}
.footer-top nav a{font-size:.8rem}
}

@media(max-width:380px){.container{padding-left:16px;padding-right:16px}
.header-inner{padding-left:16px;padding-right:16px}
.quick-converter{padding:20px 16px}
.quick-grid select{font-size:.78rem;padding-right:4px;padding-left:6px}
.quick-result{padding:20px}
.preset-row{gap:5px}
.preset-row button{padding:5px 8px;font-size:.71rem}
.calculator-form,.calculator-result{padding:20px 16px}
.metrics{grid-template-columns:1fr;gap:9px}
.metrics div{display:flex;justify-content:space-between;gap:10px;border-right:0;border-bottom:1px solid var(--line);padding:0 0 8px}
.metrics dt{font-size:.74rem;margin:0}
.metrics dd{text-align:right;max-width:62%}
.result-heading h2{font-size:1.7rem}
.reference-controls{grid-template-columns:1fr}
.result-actions{gap:6px}
.result-actions button{font-size:.73rem}
.reference-panel{padding:16px}
.post-meta{font-size:.68rem}
.article-layout .page-intro h1{font-size:2rem}
}

@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}
}

@media print{body{background:white;font-size:10pt}
.site-header,.site-footer,.skip,.menu-button,.result-actions,.form-secondary,.calculate-button,.number-help,.status,.file-picker,.article-aside,.search-controls,.reference-controls,[data-paper-csv],.preset-panel,.preset-row,.breadcrumbs,.jump-nav,.checklist-aside,.checklist-actions,.glossary-jump,.mobile-toc{display:none!important}
.container{max-width:none;padding:0}
.calculator{display:block;box-shadow:none;border:0}
.calculator-form{display:none}
.calculator-result{background:white;padding:0}
.page-intro{padding:0;margin:0 0 20px}
.calculator-result details{display:block}
.result-figure .dimension-diagram{max-height:230px}
.result-heading h2{font-size:20pt}
.metrics{grid-template-columns:repeat(3,1fr)}
.result-details tr{break-inside:avoid}
a{color:#193239}
.tool-grid,.guide-grid,.blog-grid{display:block}
.tool-card,.guide-card,.blog-card{break-inside:avoid;margin-bottom:20px}
.reference-panel{padding:0;border:0}
.table-scroll{overflow:visible;max-height:none!important}
.table-scroll table{min-width:0}
.table-scroll thead{position:static}
.article-layout,.checklist-layout{display:block}
.article-illustration{max-width:350px}
.page-intro h1{font-size:24pt}
.quick-converter{display:none}
.unit-illustration{padding:18px}
.checklist{border:0;padding:0}
.check-item{break-inside:avoid;padding:10px 0}
.check-item input{appearance:none;border:1px solid #193239;width:16px;height:16px;min-height:16px;border-radius:0;background:white}
.check-item input:checked:after{content:'✓';display:block;text-align:center;line-height:14px;font-size:13px}
.check-item>span>span{font-size:9pt}
.check-item strong{font-size:10pt}
.article-cta,.editorial-art{display:none}
.section:has(.tool-grid),.section:has(.blog-grid){display:none}
}


@media print{body:has([data-calculator]) main>.section:not(.landing-calculator),body:has([data-calculator]) .image-heading{display:none!important}}

/* Curated conversion and size reference pages */
.answer-box{margin:4px 0 28px;padding:18px 22px;background:var(--pale);border-left:3px solid var(--blue);border-radius:0 8px 8px 0;max-width:820px}
.answer-box p{margin:0;font-size:.95rem;color:#3e5357}
.answer-box p+p{margin-top:6px;font-size:.88rem}
.answer-box strong{color:var(--ink);font-size:1.08rem}
.landing-converters{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:start}
.landing-converters .quick-grid{grid-template-columns:1fr}
.landing-links{display:flex;flex-wrap:wrap;gap:8px}
.landing-links a,.landing-links span{font-size:.86rem;border:1px solid var(--line);border-radius:6px;padding:7px 12px;background:#fff;text-decoration:none;min-height:36px;display:inline-flex;align-items:center}
.landing-links a:hover{border-color:var(--blue)}
.landing-links span{background:var(--pale);font-weight:700}
.landing-calculator>h2{margin-bottom:18px}
.section>.table-scroll{margin-top:16px}
@media(max-width:800px){.landing-converters{grid-template-columns:1fr;gap:16px}}
@media(max-width:600px){.answer-box{padding:15px 16px}.answer-box strong{font-size:1rem}.landing-links a,.landing-links span{font-size:.8rem;padding:6px 10px}}
.explain-grid>div{min-width:0}
.result-table{margin:18px 0 6px}
.result-table table{min-width:0;font-size:.86rem}
.result-table caption{text-align:left}