:root{--paper:#f6f3ed;--white:#fffdf8;--ink:#243746;--muted:#73808a;--line:#dddcd5;--accent:#d94d2c;--blue:#547ea5;--radius:10px;color:var(--ink);background:var(--paper);font-synthesis:none;text-rendering:optimizelegibility;font-family:Segoe UI,Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0}a{color:inherit;text-decoration:none}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}button:focus-visible,a:focus-visible,summary:focus-visible,select:focus-visible{outline-offset:4px;outline:3px solid #547ea5}input:focus-visible{outline:none}p{line-height:1.65}h1,h2,h3,p{margin-top:0}button{color:inherit}.shell{width:min(1256px,100% - 80px);margin-inline:auto}.site-header{border-bottom:1px solid var(--line)}.header-inner{align-items:center;gap:52px;min-height:91px;display:flex}.brand{letter-spacing:-.7px;white-space:nowrap;align-items:center;gap:13px;font-size:20px;display:inline-flex}.brand b{font-weight:720}.brand-dot{color:var(--accent)}nav{gap:28px;font-size:13px;font-weight:550;display:flex}.header-inner nav a:last-child{color:#65737e}.header-inner nav a:hover,.footer-inner nav a:hover{color:var(--accent)}.header-note{color:#78816f;align-items:center;gap:7px;margin-left:auto;font-size:11px;display:flex}.header-note i{background:#8c9d78;border-radius:50%;width:6px;height:6px}.hero{justify-content:space-between;align-items:center;gap:40px;padding:53px 0 37px;display:flex}.eyebrow{letter-spacing:1.65px;color:#7d847e;margin-bottom:15px;font-size:10px;font-weight:650}.tiny-cross{color:var(--accent);vertical-align:middle;margin-right:7px;font-size:17px}h1{letter-spacing:-2.8px;margin-bottom:0;font-size:clamp(40px,4.4vw,64px);font-weight:580;line-height:1.06}.hero-side{width:310px;padding-top:17px}.hero-side p{color:#748087;margin-bottom:19px;font-size:16px;line-height:1.6}.hero-side em{color:#53636a;font-family:Georgia,serif;font-size:18px}.hero-pills{letter-spacing:.25px;gap:8px;font-size:10px;display:flex}.hero-pills span{color:#69736c;border:1px solid #dadbd3;border-radius:30px;padding:6px 10px}.generator{border-radius:var(--radius);background:var(--white);border:1px solid #d9d9d0;grid-template-columns:355px minmax(0,1fr);display:grid;overflow:hidden;box-shadow:0 4px 20px #17273704}.settings{border-right:1px solid var(--line);padding:25px 25px 15px}.section-label{align-items:center;gap:9px;display:flex}.section-label h2{letter-spacing:-.3px;margin:0;font-size:15px;font-weight:650}.step-number{color:#9b9e93;letter-spacing:.5px;font-size:10px}.small-tag{letter-spacing:.7px;color:#a4a398;margin-left:auto;font-size:8px}.field-caption{color:#7b858a;margin:8px 0 12px;font-size:10px;line-height:1.55}.presets{gap:5px;margin-bottom:25px;display:flex}.presets button{white-space:nowrap;background:0 0;border:1px solid #deded7;border-radius:5px;flex:1;padding:8px;font-size:10px}.presets button[aria-pressed=true]{color:#695540;background:#f1ede4;border-color:#bbab96}.control-heading{justify-content:space-between;align-items:center;gap:8px;margin:0 0 13px;font-size:12px;font-weight:600;display:flex}.segmented{background:#edece6;border-radius:6px;gap:2px;padding:3px;display:inline-flex}.segmented button{color:#78828a;background:0 0;border:0;border-radius:4px;line-height:1.3}.segmented button[aria-pressed=true]{color:#253a49;background:#fffdf8;box-shadow:0 1px 3px #2437460c}.units button{padding:5px 11px;font-size:10px}.dimension-grid{grid-template-columns:1fr 1fr;gap:14px 12px;display:grid}.field label{margin-bottom:7px;font-size:11px;font-weight:550;display:block}.input-wrap{background:#fff;border:1px solid #d9ddd7;border-radius:5px;align-items:center;min-width:0;padding-right:12px;transition:border-color .15s;display:flex}.input-wrap:focus-within{border-color:#5a7d9a;box-shadow:0 0 0 2px #5a7d9a20}.input-wrap input{appearance:textfield;color:#2e414f;background:0 0;border:0;width:100%;min-width:0;padding:11px 8px 11px 12px;font-size:17px;font-weight:530}.input-wrap input::-webkit-inner-spin-button,.input-wrap input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.input-wrap>span{color:#99a1a3;font-size:11px}.input-wrap.has-error{background:#fff6f1;border-color:#b84435}.field-error{color:#a13529;margin:6px 0 0;font-size:11px;line-height:1.5}.settings-divider{background:var(--line);height:1px;margin:18px 0}.subtle{color:#7c868a;font-size:10px;font-weight:400}.paper-field{margin-top:15px}.paper-field select{color:#344a59;background:#fff;border:1px solid #d9ddd7;border-radius:5px;width:100%;padding:11px;font-size:12px}.fit-notice{background:#f3f7ee;border:1px solid #dce6d7;border-radius:6px;align-items:flex-start;gap:10px;margin:17px 0;padding:11px;display:flex}.fit-notice>span{color:#688152;font-size:14px}.fit-notice strong{color:#556b45;font-size:11px;font-weight:650}.fit-notice p{color:#7a8770;margin:3px 0 0;font-size:10px;line-height:1.5}.fit-notice.warning{background:#fff4e8;border-color:#e6c7a2}.fit-notice.warning strong,.fit-notice.warning>span{color:#9d5724}.fit-notice.warning p{color:#916847}.button{border:1px solid #0000;border-radius:5px;justify-content:space-between;align-items:center;gap:15px;min-height:43px;padding:11px 15px;font-size:12px;font-weight:600;transition:background .15s,box-shadow .15s;display:inline-flex}.button.primary{background:var(--accent);color:#fffdf6}.button.primary:hover:not(:disabled){background:#bd3f23;box-shadow:0 2px 7px #d94d2c20}.button.secondary{background:0 0;border-color:#dbdcd6}.button.secondary:hover:not(:disabled){background:#f0eee8}.download-pdf,.download-svg{width:100%}.download-pdf>span:last-child{font-size:20px;line-height:15px}.download-svg{margin-top:8px}.download-note{text-align:center;color:#91968b;margin:10px 0 0;font-size:9px}.download-status{color:#4d6a43;min-height:0;margin-top:8px;font-size:11px;line-height:1.5}.download-status:empty{display:none}.preview-panel{flex-direction:column;min-width:0;display:flex}.preview-top{justify-content:space-between;align-items:center;gap:15px;min-height:71px;padding:16px 24px;display:flex}.view-toggle button{padding:7px 12px;font-size:10px}.preview-canvas{background-color:#efeee8;background-image:radial-gradient(#b3b9b24d .7px,#0000 .7px);background-size:16px 16px;border-top:1px solid #e5e4dc;border-bottom:1px solid #e5e4dc;flex-direction:column;flex:1;min-height:400px;padding:19px 23px 17px;display:flex;position:relative}.canvas-meta,.canvas-bottom{color:#929b99;letter-spacing:1.2px;justify-content:space-between;align-items:center;gap:15px;font-size:8px;display:flex}.canvas-label{color:#8a948d}.net-preview,.folded-preview{flex:1;width:100%;height:440px;min-height:0;max-height:460px;margin:auto;display:block}.net-preview{filter:drop-shadow(0 5px 3px #514b3e0b)}.canvas-bottom{letter-spacing:.4px;margin-top:auto;font-size:9px}.canvas-bottom>span:last-child{letter-spacing:1px;color:#a3aaa4;font-size:7px}.preview-bottom{justify-content:space-between;align-items:center;gap:15px;padding:15px 24px;display:flex}.part-tabs{gap:7px;display:flex}.part-tabs button{color:#969d9c;background:0 0;border:1px solid #0000;border-radius:5px;padding:9px 12px;font-size:9px}.part-tabs button strong{color:#707c83;margin-left:7px;font-size:11px;font-weight:550}.part-tabs button[aria-pressed=true]{color:#a78d71;background:#f0eee7;border-color:#e1ded4}.part-tabs button[aria-pressed=true] strong{color:#374b58}.legend{align-items:center;gap:13px;display:flex}.legend span{color:#929b9b;align-items:center;gap:5px;font-size:9px;display:flex}.legend i{background:#425666;width:14px;height:1px;display:inline-block}.legend .fold{border-top:1px dashed var(--blue);background:0 0}.legend .glue{background:repeating-linear-gradient(135deg,#b6a58b 0 1px,#efe8dc 1px 3px);width:10px;height:9px}.preview-footnote{color:#869082;border:1px dashed #ddded4;border-radius:5px;gap:10px;margin:5px 24px 23px;padding:12px 14px;display:flex}.preview-footnote>span{font-size:18px}.preview-footnote p{color:#7f898b;margin:0;font-size:10px;line-height:1.65}.preview-footnote strong{color:#617078;font-weight:550}.preview-footnote a{white-space:nowrap;text-underline-offset:3px;color:#5c717e;text-decoration:underline}.empty-preview{text-align:center;color:#7d8788;flex:1;place-content:center;padding:35px 0;display:grid}.empty-preview>span{color:#b7ada0;font-size:42px}.empty-preview h3{margin:15px 0;font-size:18px}.empty-preview p{max-width:300px;margin:auto;font-size:13px}.how-section{border-bottom:1px solid var(--line);grid-template-columns:280px 1fr;gap:70px;padding:67px 0;display:grid}.how-heading h2,.faq-section h2{letter-spacing:-1px;margin-bottom:20px;font-size:31px;font-weight:560;line-height:1.18}.text-link{color:#a7462e;border-bottom:1px solid #cfb5a5;padding-bottom:4px;font-size:12px;line-height:1.5}.how-steps{grid-template-columns:repeat(3,1fr);gap:31px;margin:0;padding:4px 0 0;list-style:none;display:grid}.how-steps li>span{letter-spacing:1.5px;color:#aaa58d;font-size:9px}.how-steps h3{margin:17px 0 10px;font-size:14px;font-weight:600}.how-steps p{color:#84908f;margin:0;font-size:12px;line-height:1.75}.faq-section{grid-template-columns:280px 1fr;gap:70px;padding:60px 0;display:grid}.faq-section>div>p:last-child{color:#83908f;font-size:12px}.faq-list details{border-bottom:1px solid var(--line)}.faq-list details:first-child{border-top:1px solid var(--line)}.faq-list summary{cursor:pointer;padding:19px 26px 19px 0;font-size:13px;font-weight:550;list-style:none;position:relative}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";color:#9c9e91;font-size:20px;font-weight:350;position:absolute;top:16px;right:3px}.faq-list details[open] summary:after{content:"−"}.faq-list details p{color:#6c7c84;max-width:700px;margin:0 20px 20px 0;font-size:12px}.faq-list details p a{text-decoration:underline}.closing-strip{border-top:1px solid var(--line);align-items:center;gap:10px;padding:26px 0 33px;display:flex}.closing-strip p{color:#8a9082;margin:0;font-size:12px}.closing-strip a{color:#a84a30;white-space:nowrap;margin-left:auto;font-size:11px}.site-footer{background:#eeece4;border-top:1px solid #e4e2d9}.footer-inner{justify-content:space-between;align-items:center;gap:30px;padding-block:36px;display:flex}.footer-brand{gap:4px;font-size:16px}.footer-inner p{color:#9a9f93;margin:9px 0 0;font-size:11px}.footer-inner nav{color:#7d8987;font-size:11px}.footer-small{color:#969d92;text-align:right;font-size:9px;line-height:1.7}.skip-link{z-index:100;background:var(--ink);color:#fff;border-radius:5px;padding:15px;position:fixed;top:-100px;left:20px}.skip-link:focus{top:12px}.noscript{border:1px solid #b4532f;margin:15px 0;padding:20px}.guide{max-width:960px;padding-block:40px 80px}.guide.narrow{max-width:760px}.back-link{color:#8b7760;margin-bottom:42px;font-size:12px;display:inline-block}.guide>h1{margin-bottom:24px;font-size:58px}.guide-lead{color:#79858a;max-width:680px;margin-bottom:32px;font-size:18px}.guide h2{letter-spacing:-.6px;margin:30px 0 15px;font-size:25px;font-weight:560}.guide>p:not(.eyebrow):not(.guide-lead),.guide li,.assembly-step p{color:#667882;font-size:15px;line-height:1.8}.guide p a,.guide li a{text-underline-offset:3px;text-decoration:underline}.guide-callout{background:#eeeadd;border-left:3px solid #c5a77c;border-radius:3px;margin:30px 0;padding:23px 26px}.guide-callout strong{font-size:14px}.guide-callout p{color:#778178;margin:8px 0 0;font-size:14px}.assembly-step{border-bottom:1px solid var(--line);grid-template-columns:300px 1fr;align-items:center;gap:40px;padding:30px 0;display:grid}.assembly-step h2{margin-top:10px}.assembly-diagram{background:#eeebe2;border-radius:8px;padding:20px}.assembly-diagram>svg{width:100%;height:240px;margin:0;display:block}.guide-button{min-width:235px;margin-top:26px}.guide-instructions{margin-top:40px;padding-left:25px}.guide-instructions li{margin-bottom:25px;padding-left:12px}.guide-instructions h2{margin-bottom:10px}.guide-instructions li::marker{color:#c66b45;font-size:19px}@media (width>=1500px){.hero{padding-top:60px}.generator{grid-template-columns:375px minmax(0,1fr)}.settings{padding:28px 30px 18px}.preview-canvas{min-height:470px}.net-preview,.folded-preview{height:470px;max-height:490px}}@media (width<=1100px){.shell{width:calc(100% - 48px)}.header-note{display:none}.header-inner{justify-content:space-between;gap:20px}.hero-side{width:270px}.generator{grid-template-columns:320px minmax(0,1fr)}.settings{padding:22px 20px}.preview-top{flex-wrap:wrap;padding-inline:18px}.preview-top h2{font-size:14px}.preview-canvas{padding-inline:15px}.preview-bottom{flex-wrap:wrap;padding-inline:15px}.preview-footnote{margin-inline:15px}.legend{margin-left:auto}.how-section,.faq-section{grid-template-columns:220px 1fr;gap:35px}.how-steps{gap:20px}.hero h1{font-size:54px}}@media (width<=800px){.hero h1{letter-spacing:-2px;font-size:45px}.hero-side{width:220px}.hero-side p{font-size:14px}.hero-pills{flex-wrap:wrap}.generator{grid-template-columns:290px minmax(0,1fr)}.settings{padding:20px 16px}.presets{gap:4px}.presets button{padding:8px 5px;font-size:9px}.small-tag{display:none}.preview-top{gap:10px}.view-toggle button{padding:7px 9px}.net-preview,.folded-preview{height:340px}.canvas-meta{font-size:7px}.canvas-meta>span:last-child,.canvas-bottom>span:last-child{display:none}.how-section{grid-template-columns:1fr;gap:25px}.how-heading h2 br{display:none}.how-heading h2{margin-bottom:13px}.faq-section{grid-template-columns:1fr;gap:20px}.faq-section h2{margin-bottom:10px}.footer-small{display:none}.assembly-step{grid-template-columns:230px 1fr;gap:25px}.guide>h1{font-size:48px}}@media (width<=620px){.shell{width:calc(100% - 32px)}.header-inner{min-height:75px}.brand{gap:9px;font-size:17px}.brand svg{width:28px;height:31px}.header-inner nav{gap:0;font-size:11px}.header-inner nav a:first-child{display:none}.hero{padding:32px 0 26px;display:block}.hero h1{letter-spacing:-2px;font-size:42px}.eyebrow{letter-spacing:1.2px;font-size:8px}.hero-side{width:auto;padding:17px 0 0}.hero-side p{margin-bottom:12px;font-size:13px}.hero-side p br{display:none}.hero-side p em{font-size:15px}.hero-pills{font-size:9px}.hero-pills span{padding:5px 9px}.generator{grid-template-columns:1fr}.settings{border-right:none;padding:23px 22px 18px}.settings .section-label h2{font-size:16px}.small-tag{display:block}.field-caption{font-size:11px}.presets button{padding:9px;font-size:11px}.control-heading{font-size:13px}.field label{font-size:12px}.input-wrap input{min-height:46px;font-size:18px}.presets{margin-bottom:23px}.dimension-grid{gap:15px}.input-wrap>span{font-size:12px}.settings-divider{margin:20px 0}.paper-field select{min-height:45px;font-size:14px}.fit-notice strong{font-size:12px}.fit-notice p{font-size:11px}.button{min-height:47px;font-size:13px}.download-note{font-size:10px}.preview-panel{border-top:1px solid var(--line)}.preview-top{flex-wrap:nowrap;padding:17px 19px}.preview-top h2{font-size:14px}.view-toggle button{padding:8px;font-size:9px}.preview-top .step-number{display:none}.preview-canvas{min-height:325px;padding:16px}.net-preview,.folded-preview{height:295px;max-height:340px}.canvas-meta>span:last-child{font-size:7px;display:block}.preview-bottom{gap:10px;padding:12px 17px}.part-tabs button{padding:8px 9px}.part-tabs button strong{margin-left:5px;font-size:11px}.legend{gap:10px}.legend span{font-size:8px}.legend i{width:10px}.preview-footnote{margin:5px 17px 19px}.preview-footnote p{font-size:11px}.how-section{gap:24px;padding:39px 0}.how-steps{grid-template-columns:1fr;gap:24px}.how-steps h3{margin:8px 0;font-size:16px}.how-steps p{max-width:400px;font-size:13px}.how-heading h2,.faq-section h2{font-size:29px}.faq-section{padding:35px 0}.faq-list summary{padding-block:17px;font-size:13px;line-height:1.6}.faq-list details p{font-size:13px}.closing-strip{flex-wrap:wrap;align-items:flex-start;gap:9px;padding:23px 0}.closing-strip p{width:calc(100% - 36px);font-size:11px}.closing-strip a{margin:2px 0 0 30px;font-size:11px}.closing-strip .tiny-cross{margin:0}.footer-inner{align-items:flex-start;gap:23px;padding-block:28px}.footer-inner nav{flex-direction:column;gap:13px;font-size:11px}.footer-brand{font-size:16px}.footer-inner p{font-size:10px}.guide{padding-block:28px 50px}.back-link{margin-bottom:30px}.guide>h1{font-size:42px}.guide-lead{font-size:16px}.guide h2{font-size:23px}.guide>p:not(.eyebrow):not(.guide-lead),.guide li,.assembly-step p{font-size:14px}.assembly-step{grid-template-columns:1fr;gap:25px;padding:30px 0}.assembly-diagram{max-width:400px}.assembly-diagram>svg{height:230px}.guide-callout{padding:19px}.guide-callout p{font-size:13px}.guide-instructions{padding-left:20px}.guide-instructions li{padding-left:5px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}}.hero-download-link{margin-top:16px;display:inline-block}.ready-strip{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:30px;padding:30px 0;display:flex}.ready-strip .eyebrow{margin-bottom:9px}.ready-strip h2{letter-spacing:-.7px;margin-bottom:8px;font-size:24px;font-weight:560}.ready-strip p:last-child{color:#667882;max-width:620px;margin:0;font-size:13px}.ready-strip .button{flex-shrink:0}.template-library{max-width:1256px}.template-library>h1{max-width:900px}.template-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:36px;display:grid}.template-card{border:1px solid var(--line);background:var(--white);border-radius:9px;min-width:0;overflow:hidden}.template-illustration{background:#eeebe2;height:225px;position:relative}.template-illustration .folded-preview{height:190px;min-height:0;max-height:190px}.template-illustration>span{color:#667882;font-size:10px;position:absolute;bottom:13px;left:20px}.template-card-body{padding:24px 22px}.template-card-body .eyebrow{margin-bottom:10px}.template-card h2{margin:0 0 12px;font-size:25px}.template-card p:not(.eyebrow){color:#667882;min-height:66px;font-size:13px;line-height:1.7}.template-card dl{margin:20px 0 24px;font-size:11px}.template-card dl div{border-bottom:1px solid var(--line);justify-content:space-between;gap:10px;padding:9px 0;display:flex}.template-card dt{color:#667882}.template-card dd{text-align:right;margin:0}.template-downloads{gap:8px;display:grid}.svg-downloads{flex-wrap:wrap;gap:14px;margin-top:19px;font-size:11px;display:flex}.svg-downloads a{border-bottom:1px solid #c9b29b;padding-bottom:3px}.related-guides{color:#a7462e;flex-wrap:wrap;gap:16px 28px;margin:30px 0;font-size:14px;display:flex}.related-guides a{text-underline-offset:4px;text-decoration:underline}.fit-example{border:1px solid var(--line);background:#eeebe2;border-radius:6px;gap:13px;padding:26px;display:grid}.fit-example b{color:#667882;font-size:18px;font-weight:500}.fit-example strong{color:#a7462e;font-size:26px}.noscript a{text-decoration:underline}.header-inner nav{flex-shrink:0}@media (width<=1100px){.template-grid{gap:15px}.template-card-body{padding:20px 17px}.template-card h2{font-size:23px}.ready-strip{align-items:flex-start}.ready-strip .button{max-width:220px}.template-card dl div{flex-direction:column;gap:4px}.template-card dd{text-align:left}}@media (width<=800px){.template-grid{grid-template-columns:1fr}.template-card{grid-template-columns:240px 1fr;display:grid}.template-illustration{align-content:center;height:100%;min-height:270px;display:grid}.template-card p:not(.eyebrow){min-height:0}.template-card dl div{flex-direction:row}.template-downloads{grid-template-columns:1fr 1fr}.template-card h2{font-size:26px}.template-illustration .folded-preview{width:100%}}@media (width<=620px){.header-inner{flex-wrap:wrap;gap:13px;padding-block:18px}.header-inner nav{gap:20px}.header-inner nav a:first-child{display:inline}.header-inner nav a{font-size:11px}.header-inner .brand{width:100%;font-size:18px}.ready-strip{padding:26px 0;display:block}.ready-strip h2{font-size:24px}.ready-strip .button{width:100%;max-width:none;margin-top:20px}.template-library>h1{overflow-wrap:break-word;font-size:40px}.template-card{display:block}.template-illustration{height:215px;min-height:0}.template-card-body{padding:24px}.template-downloads{grid-template-columns:1fr}.template-grid{gap:24px}.related-guides{font-size:13px;display:grid}.template-card dl{font-size:12px}}