:root{--ink:#171713;--paper:#fffdf8;--cream:#f3efe6;--muted:#625d55;--blue:#3155e7;--green:#b7efcd;--orange:#f06431;--line:2px solid var(--ink);--max:1160px;--shadow:6px 6px 0 var(--ink)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--cream);color:var(--ink);font:16px/1.68 ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}img{max-width:100%}a{color:inherit}.wrap{width:min(var(--max),92vw);margin-inline:auto}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;z-index:100;background:white;padding:10px;border:2px solid}.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:13px 4vw;border-bottom:var(--line);background:#f3efe6ed;backdrop-filter:blur(12px)}.brand{text-decoration:none;font-weight:950;letter-spacing:-.035em}.nav{display:flex;align-items:center;gap:18px}.nav a{text-decoration:none;font-weight:800;font-size:14px}.menu-button{display:none;width:auto;padding:7px 10px;background:white;color:var(--ink)}.hero{padding:72px 0 46px}.eyebrow{font-size:12px;font-weight:900;letter-spacing:.15em;text-transform:uppercase}.hero h1,.article-head h1{font-size:clamp(46px,8.4vw,96px);line-height:.9;letter-spacing:-.072em;margin:.14em 0}.hero p{font-size:20px;max-width:790px}.trust{display:inline-block;padding:9px 13px;background:var(--green);border:var(--line);box-shadow:5px 5px 0}.tool{display:grid;grid-template-columns:minmax(330px,410px) minmax(0,1fr);gap:26px;padding:46px 0;border-top:var(--line)}.card,.stage,.answer,.toc,.example,.faq details,.panel{border:var(--line);background:var(--paper)}.card{padding:22px}.card h2{margin-top:0;font-size:29px;letter-spacing:-.04em}.field-label,label{display:block;margin:14px 0 6px;font-weight:850}.help{display:block;margin-top:5px;color:var(--muted);font-size:13px}input,select,button{width:100%;min-height:46px;padding:10px 12px;border:2px solid;border-radius:0;font:inherit;background:white;color:var(--ink)}input:focus-visible,select:focus-visible,button:focus-visible,a:focus-visible,summary:focus-visible{outline:4px solid #ffbf47;outline-offset:2px}button{font-weight:900;background:var(--blue);color:white;cursor:pointer}button.secondary{background:white;color:var(--ink)}button:disabled{cursor:not-allowed;opacity:.45}.row{display:grid;grid-template-columns:1fr 118px;gap:10px}.row.equal{grid-template-columns:1fr 1fr}.check{display:flex;align-items:flex-start;gap:10px;margin:14px 0}.check input{width:20px;min-height:20px;margin-top:3px}.check label{margin:0;font-weight:700}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:16px 0}.metric{padding:10px;background:#ebe5da;border:1px solid;min-width:0}.metric span{display:block;font-size:11px;font-weight:850;text-transform:uppercase;letter-spacing:.08em}.metric b{display:block;overflow-wrap:anywhere}.size-summary{margin:16px 0;padding:14px;border-left:8px solid var(--blue);background:#eef1ff}.size-summary span{display:block;font-size:12px;font-weight:850;text-transform:uppercase;letter-spacing:.1em}.size-summary strong{display:block;font-size:20px;line-height:1.35}.status{min-height:52px;margin:12px 0 0;color:var(--muted)}.status.warn{color:#8d2c10;font-weight:800}.status.good{color:#17633a;font-weight:800}.stage{min-height:620px;padding:54px 50px 62px;display:grid;place-items:center;background:#d8d0c3;overflow:hidden}.paper-shell{width:min(480px,100%);position:relative}.paper-name{position:absolute;left:0;top:-32px;font-size:12px;font-weight:900;letter-spacing:.09em;text-transform:uppercase}.paper{width:100%;aspect-ratio:210/297;background:white;position:relative;box-shadow:0 14px 38px #0004;overflow:visible}.paper:before{content:"A4: 210 mm · 21 cm · 8.27 in";position:absolute;left:50%;bottom:-32px;transform:translateX(-50%);white-space:nowrap;font-size:10px;font-weight:900;color:#4b4741}.paper:after{content:"297 mm · 29.7 cm · 11.69 in";position:absolute;right:-84px;top:50%;transform:translateY(-50%) rotate(90deg);white-space:nowrap;font-size:10px;font-weight:900;color:#4b4741}.safe-zone{position:absolute;inset:3.37% 4.76%;border:1px dashed #aaa;pointer-events:none}.safe-zone:after{content:"10 mm guide";position:absolute;right:3px;bottom:2px;font-size:8px;color:#777}.image-frame{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:23.81%;aspect-ratio:1;min-width:2px;min-height:2px;border:1px dashed var(--blue);background:#edf0ff;box-shadow:0 0 0 1px #fff;transition:width .15s ease,aspect-ratio .15s ease}.image-frame img{display:block;width:100%;height:100%;object-fit:fill}.image-frame.empty img{display:none}.image-frame.empty:after{content:"Your image";position:absolute;inset:0;display:grid;place-items:center;color:#6d6a7d;font-size:12px;font-weight:800}.dim-h{position:absolute;left:0;right:0;top:-28px;border-top:2px solid var(--blue);height:18px;color:var(--blue)}.dim-h:before,.dim-h:after{content:"";position:absolute;top:-5px;width:2px;height:11px;background:var(--blue)}.dim-h:before{left:0}.dim-h:after{right:0}.dim-h b{position:absolute;left:50%;top:-23px;transform:translateX(-50%);padding:2px 5px;background:white;border:1px solid var(--blue);font-size:10px;white-space:nowrap}.dim-v{position:absolute;top:0;bottom:0;right:-28px;border-right:2px solid var(--orange);width:18px;color:#9c3512}.dim-v:before,.dim-v:after{content:"";position:absolute;right:-5px;width:11px;height:2px;background:var(--orange)}.dim-v:before{top:0}.dim-v:after{bottom:0}.dim-v b{position:absolute;left:10px;top:50%;transform:translateY(-50%) rotate(90deg);padding:2px 5px;background:white;border:1px solid var(--orange);font-size:10px;white-space:nowrap}.preview-caption{text-align:center;margin:44px 0 0;color:#5f5a52;font-size:12px;font-weight:700}.section{padding:62px 0;border-top:1px solid}.section-grid{display:grid;grid-template-columns:.72fr 1.28fr;gap:7vw}.section h2{font-size:clamp(38px,6vw,70px);line-height:.95;letter-spacing:-.06em;margin:0}.section h3{font-size:25px;line-height:1.18;letter-spacing:-.02em}.note,.answer{border-left:8px solid var(--orange);padding:17px;background:white}.answer{border:var(--line);border-left:10px solid var(--blue);margin:22px 0}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.link-card{display:block;padding:20px;border:var(--line);background:var(--paper);text-decoration:none}.link-card:hover{transform:translate(-2px,-2px);box-shadow:5px 5px 0}.link-card b{display:block;font-size:21px;line-height:1.2}.link-card span{display:block;color:var(--muted);margin-top:8px}.steps{counter-reset:steps;display:grid;gap:14px}.step{counter-increment:steps;padding:18px 18px 18px 68px;border:var(--line);background:white;position:relative}.step:before{content:counter(steps);position:absolute;left:16px;top:16px;width:36px;height:36px;display:grid;place-items:center;background:var(--blue);color:white;font-weight:900;border:2px solid}.step h3{margin:0 0 5px}.tips{display:grid;grid-template-columns:1fr 1fr;gap:16px}.tip{padding:20px;border:var(--line);background:white}.tip h3{margin-top:0}.faq{display:grid;gap:10px}.faq details{padding:0}.faq summary{cursor:pointer;font-weight:900;font-size:18px;padding:17px 50px 17px 17px;position:relative}.faq summary:after{content:"+";position:absolute;right:18px;font-size:24px}.faq details[open] summary:after{content:"−"}.faq details div{padding:0 18px 18px;color:#332f2a}.article-head{padding:58px 0 34px}.article-head h1{font-size:clamp(44px,7vw,78px);max-width:1000px}.dek{font-size:21px;max-width:820px}.byline{color:var(--muted);font-size:14px}.breadcrumbs{font-size:13px;color:var(--muted);padding-top:24px}.breadcrumbs a{text-decoration:none}.article-layout{display:grid;grid-template-columns:250px minmax(0,760px);gap:56px;align-items:start;padding-bottom:74px}.toc{padding:18px;position:sticky;top:80px}.toc b{display:block;margin-bottom:8px}.toc a{display:block;padding:5px 0;text-decoration:none;font-size:14px}.prose h2{font-size:35px;line-height:1.08;letter-spacing:-.04em;margin:1.7em 0 .45em}.prose h3{font-size:24px;margin:1.45em 0 .3em}.prose p,.prose li{font-size:17px}.prose table{width:100%;border-collapse:collapse;margin:24px 0;background:white}.prose th,.prose td{border:1px solid;padding:10px;text-align:left}.prose th{background:#ebe5da}.formula{padding:18px;border:var(--line);background:#eef1ff;font:700 19px/1.5 ui-monospace,SFMono-Regular,monospace;overflow:auto}.example{padding:18px;margin:18px 0}.references{padding-left:20px}.references a{overflow-wrap:anywhere}.author-box{margin-top:48px;padding:20px;border:var(--line);background:#e9e2d7}.footer{padding:38px 0 64px;border-top:var(--line)}.footer-grid{display:grid;grid-template-columns:1fr 2fr;gap:32px}.footer-brand{display:inline-block}.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.footer a{text-decoration:none}.calc-output{font-size:clamp(34px,6vw,64px);font-weight:900;letter-spacing:-.05em;margin:.2em 0}.callout{padding:16px;border:1px solid;background:#fff}.legal{width:min(850px,92vw);margin:auto;padding:52px 0 82px}.legal h1{font-size:clamp(43px,8vw,68px);letter-spacing:-.055em;line-height:.95}.legal h2{margin-top:40px}.badge{display:inline-block;padding:3px 8px;border:1px solid;font-size:12px;font-weight:800}.sitemap-list{columns:2;column-gap:50px}.sitemap-list li{break-inside:avoid;margin:.5em 0}.ko{word-break:keep-all}.ad-placeholder{display:none}
@media(max-width:880px){.menu-button{display:block}.nav{display:none;position:absolute;left:0;right:0;top:100%;padding:14px 4vw;background:var(--cream);border-bottom:var(--line);flex-direction:column;align-items:flex-start}.nav.open{display:flex}.tool,.section-grid,.article-layout,.footer-grid{grid-template-columns:1fr}.toc{position:static}.cards{grid-template-columns:1fr}.stage{min-height:480px;padding:50px 34px 60px}.metrics{grid-template-columns:1fr}.paper:after{display:none}.footer-links{grid-template-columns:1fr 1fr}.hero{padding-top:52px}.tips{grid-template-columns:1fr}}
@media(max-width:500px){.stage{padding:50px 27px 58px}.dim-h b,.dim-v b{font-size:8px}.paper:before{font-size:8px}.row.equal{grid-template-columns:1fr}.footer-links{grid-template-columns:1fr}.sitemap-list{columns:1}.hero h1{font-size:48px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

.network-promo{margin:0 0 56px;padding:24px;border:2px solid #171713;background:#eef1ff;display:flex;align-items:center;justify-content:space-between;gap:20px;box-shadow:7px 7px 0 #171713}.network-promo h2{margin:0 0 6px;font-size:28px;letter-spacing:-.04em}.network-promo p{margin:0;color:#5f5a52}.network-promo a{display:inline-block;padding:12px 15px;background:#3155e7;color:#fff;text-decoration:none;font-weight:900;white-space:nowrap}@media(max-width:700px){.network-promo{display:block}.network-promo a{margin-top:16px}}