:root{--paper: #FFFFFF;--wash: #F4F5F7;--sheet-tint: #FAFAF7;--ink: #16181D;--muted: #5B6470;--faint: #9AA2AE;--line: #DDE1E7;--orange: #FF4D00;--orange-soft: rgba(255, 77, 0, .07);--blue: #3E5C82;--maxw: 1180px;--content-maxw: 760px;--font-display: "Archivo", "Inter", -apple-system, "Segoe UI", sans-serif;--font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}html,body{overflow-x:clip}body{margin:0;font-family:var(--font-body);color:var(--ink);background-color:var(--paper);background-image:linear-gradient(var(--wash) 1px,transparent 1px),linear-gradient(90deg,var(--wash) 1px,transparent 1px);background-size:32px 32px;line-height:1.7;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}::selection{background:var(--orange);color:#fff}a{color:var(--ink);text-decoration:none}a:hover{color:var(--orange)}.post a,.prose a{color:var(--orange);text-decoration:underline;text-underline-offset:3px}.post a:hover,.prose a:hover{color:var(--ink)}img{max-width:100%;height:auto}:focus-visible{outline:2px solid var(--orange);outline-offset:3px}h1,h2,h3,h4{font-family:var(--font-display);line-height:1.15;letter-spacing:-.02em}.mono{font-family:var(--font-mono)}.wrap{max-width:var(--maxw);margin:0 auto;padding:0 1.5rem}.prose-wrap{max-width:var(--content-maxw);margin:0 auto;padding:0 1.5rem}.section{padding:4.5rem 0}.dwg-no{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.06em;color:var(--muted);margin:0 0 1.4rem}.dwg-no b{color:var(--orange);font-weight:500}.breadcrumb{font-family:var(--font-mono);font-size:.8rem;color:var(--faint);margin:0 0 1.1rem}.breadcrumb a{color:var(--muted)}.breadcrumb a:hover{color:var(--orange)}.sheet{position:relative}.tick{position:absolute;width:22px;height:22px;border:0 solid var(--faint);pointer-events:none}.tick.tl{top:14px;left:14px;border-top-width:2px;border-left-width:2px}.tick.tr{top:14px;right:14px;border-top-width:2px;border-right-width:2px}.tick.bl{bottom:14px;left:14px;border-bottom-width:2px;border-left-width:2px}.tick.br{bottom:14px;right:14px;border-bottom-width:2px;border-right-width:2px}.site-header{position:sticky;top:0;z-index:50;background:#ffffffeb;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:72px;gap:1rem}.logo{display:inline-flex;align-items:center;gap:.65rem;color:var(--ink);font-family:var(--font-display);font-weight:800;font-size:1.2rem;letter-spacing:-.01em}.logo:hover{color:var(--ink)}.logo svg{display:block}.sheet-no{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;color:var(--faint);white-space:nowrap}.sheet-no b{color:var(--orange);font-weight:500}.nav{display:flex;gap:1.6rem;align-items:center}.nav a{color:var(--muted);font-weight:500;font-size:.93rem;padding:.35rem 0;position:relative}.nav a:hover{color:var(--ink)}.nav a.active{color:var(--ink);font-weight:600}.nav a.active:after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--orange)}.menu-btn{display:none;width:44px;height:44px;background:transparent;border:1px solid var(--line);cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:5px;padding:0}.menu-btn span{display:block;width:20px;height:2px;background:var(--ink);transition:transform .2s ease,opacity .2s ease}.nav-open .menu-btn span:nth-child(1){transform:translateY(7px) rotate(45deg)}.nav-open .menu-btn span:nth-child(2){opacity:0}.nav-open .menu-btn span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}@media(max-width:900px){.menu-btn{display:inline-flex}.sheet-no{display:none}.site-header .wrap{height:64px}.nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--paper);border-bottom:2px solid var(--ink);box-shadow:0 20px 34px #16181d1a;flex-direction:column;align-items:stretch;gap:0;padding:.4rem 1.5rem .9rem;z-index:60}.nav-open .nav{display:flex}.nav a{padding:.85rem 0;border-bottom:1px solid var(--line);font-size:1rem}.nav a:last-child{border-bottom:none}.nav a.active:after{display:none}.nav a.active{color:var(--orange)}}.btn{display:inline-block;background:var(--ink);color:#fff;font-weight:600;font-size:.95rem;padding:.9rem 1.75rem;border:2px solid var(--ink);cursor:pointer}.btn:hover{background:var(--orange);border-color:var(--orange);color:#fff}.btn-ghost{background:transparent;color:var(--ink)}.btn-ghost:hover{background:var(--ink);border-color:var(--ink);color:#fff}.hero{padding:5rem 0 4rem}.titleblock{border:2px solid var(--ink);background:var(--paper)}.tb-top{display:grid;grid-template-columns:1fr 250px}.tb-main{padding:3.25rem 3rem}.tb-meta{border-left:2px solid var(--ink);display:grid;grid-template-rows:repeat(4,1fr);font-family:var(--font-mono)}.tb-meta>div{padding:.9rem 1.25rem;border-bottom:1px solid var(--line)}.tb-meta>div:last-child{border-bottom:0}.tb-meta .k{display:block;font-size:.62rem;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);margin-bottom:2px}.tb-meta .v{font-size:.82rem;font-weight:500}.tb-meta .v.hot{color:var(--orange)}.tb-foot{display:flex;border-top:2px solid var(--ink);font-family:var(--font-mono)}.tb-foot>div{flex:1;padding:.7rem 1.25rem;font-size:.68rem;letter-spacing:.06em;color:var(--faint);border-right:1px solid var(--line)}.tb-foot>div:last-child{border-right:0;text-align:right}.hero h1{font-size:clamp(2.6rem,5.4vw,4.3rem);font-weight:800;margin:0}.hero h1 .hl{background:linear-gradient(transparent 62%,#ff4d0040 62%)}.hero .rev{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.06em;color:var(--muted);margin:0 0 1.4rem}.hero .rev b{color:var(--orange);font-weight:500}.hero .lead{margin:1.5rem 0 0;font-size:1.12rem;color:var(--muted);max-width:60ch}.hero-actions{margin-top:2.1rem;display:flex;gap:.9rem;flex-wrap:wrap}@media(max-width:760px){.tb-top{grid-template-columns:1fr}.tb-main{padding:2.25rem 1.5rem}.tb-meta{border-left:0;border-top:2px solid var(--ink);grid-template-columns:1fr 1fr;grid-template-rows:none}.tb-meta>div:nth-child(odd){border-right:1px solid var(--line)}.tb-meta>div:nth-child(1),.tb-meta>div:nth-child(2){border-bottom:1px solid var(--line)}.tb-foot{flex-direction:column}.tb-foot>div{border-right:0;border-bottom:1px solid var(--line)}.tb-foot>div:last-child{border-bottom:0;text-align:left}.tick{display:none}}.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;margin:0 0 1.4rem}.sec-head h2{font-size:.95rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;margin:0}.sec-head h2 .sq{display:inline-block;width:10px;height:10px;background:var(--orange);margin-right:10px}.sec-head a.more{font-size:.9rem;color:var(--muted);font-weight:500;white-space:nowrap}.sec-head a.more:hover{color:var(--orange)}.spec-list{border-top:2px solid var(--ink)}a.spec{display:grid;grid-template-columns:96px 1fr auto;border:2px solid var(--ink);border-top:0;background:var(--paper);color:var(--ink)}a.spec:first-child{border-top:2px solid var(--ink)}a.spec:hover{background:var(--orange-soft)}a.spec:hover .spec-title{color:var(--orange)}.spec-no{display:flex;align-items:center;justify-content:center;border-right:1px solid var(--line);font-family:var(--font-mono);font-size:.82rem;color:var(--faint);padding:1.6rem .5rem}.spec-body{padding:1.6rem 1.9rem}.spec-title{font-family:var(--font-display);font-size:1.32rem;font-weight:700;letter-spacing:-.01em;line-height:1.3;margin:0;transition:color .15s}.spec-desc{color:var(--muted);font-size:.93rem;margin:.5rem 0 0;max-width:68ch}.spec-tag{display:flex;align-items:center;padding:0 1.9rem;border-left:1px dashed var(--line);font-family:var(--font-mono);font-size:.68rem;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--blue);white-space:nowrap}@media(max-width:640px){a.spec{grid-template-columns:1fr}.spec-no{display:none}.spec-body{padding:1.4rem 1.4rem 1.1rem}.spec-tag{border-left:0;border-top:1px dashed var(--line);padding:.8rem 1.4rem}}.cat-chips{display:flex;flex-wrap:wrap;gap:.6rem;margin:0 0 2rem}.cat-chip{display:inline-flex;align-items:center;gap:.45rem;font-family:var(--font-mono);font-size:.72rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;border:2px solid var(--ink);border-radius:999px;padding:.42rem .95rem;color:var(--ink);background:#fff;text-decoration:none;transition:background .15s,color .15s}a.cat-chip:hover{background:var(--ink);color:#fff}.cat-chip--on{background:var(--ink);color:#fff;cursor:default}.cat-chip__n{display:inline-flex;align-items:center;justify-content:center;min-width:1.35rem;height:1.35rem;border-radius:999px;background:var(--orange);color:#fff;font-size:.66rem;padding:0 .3rem}.cat-chip--on .cat-chip__n{background:#fff;color:var(--ink)}.tracks{display:grid;grid-template-columns:repeat(4,1fr);gap:1.1rem}a.track{border:2px solid var(--ink);background:var(--paper);padding:1.9rem 1.6rem;color:var(--ink);transition:transform .16s ease,box-shadow .16s ease}a.track:hover{transform:translate(-3px,-3px);box-shadow:5px 5px 0 var(--orange);color:var(--ink)}.track .fig{font-family:var(--font-mono);font-size:.75rem;color:var(--faint);margin:0 0 .9rem;letter-spacing:.06em}.track .fig b{color:var(--orange);font-weight:500}.track h3{font-size:1.18rem;font-weight:700;margin:0 0 .55rem}.track p{font-size:.9rem;color:var(--muted);margin:0}@media(max-width:900px){.tracks{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){.tracks{grid-template-columns:1fr}}.rss-strip{border:2px solid var(--ink);background:var(--paper);margin-top:4.5rem}.rss-strip .inner{display:flex;align-items:center;justify-content:space-between;gap:2rem;padding:2.4rem 2.6rem;flex-wrap:wrap}.rss-strip h2{font-size:1.5rem;font-weight:800;margin:0 0 .5rem}.rss-strip p{color:var(--muted);margin:0;max-width:52ch}.rss-strip .fmt{font-family:var(--font-mono);font-size:.72rem;color:var(--faint);letter-spacing:.08em;display:block;margin-bottom:.9rem}@media(max-width:640px){.rss-strip .inner{padding:1.8rem 1.5rem}}.post-header{padding:4rem 0 0}.post-header h1{font-size:clamp(2.1rem,4.6vw,3.2rem);font-weight:800;margin:0 0 1.4rem;max-width:20ch}.post-kicker{font-family:var(--font-mono);font-size:.75rem;font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--orange);margin:0 0 1rem}.post-meta{font-family:var(--font-mono);font-size:.8rem;color:var(--muted);display:flex;gap:1.4rem;flex-wrap:wrap;margin:0 0 1.2rem}.post-tags{display:flex;gap:.55rem;flex-wrap:wrap;margin:0 0 2.6rem}a.tag{font-family:var(--font-mono);font-size:.75rem;color:var(--muted);border:1px solid var(--line);padding:.32rem .7rem;background:var(--paper)}a.tag:hover{border-color:var(--orange);color:var(--orange)}figure.post-hero{margin:0 0 3rem;padding:10px;border:2px solid var(--ink);background:var(--sheet-tint);position:relative}figure.post-hero img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}figure.post-hero .lottie-hero{display:none;width:100%;aspect-ratio:16/9}figure.post-hero .lottie-hero.is-playing{display:block}figure.post-hero .lottie-hero.is-playing~img{display:none}figure.post-hero .anim-hero{width:100%;aspect-ratio:16/9}figure.post-hero .anim-hero svg{display:block;width:100%;height:100%}@media(prefers-reduced-motion:reduce){figure.post-hero .anim-hero svg *{animation:none!important}}figcaption.sheet-cap{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.06em;color:var(--faint);padding:.7rem .2rem .1rem;display:flex;justify-content:space-between}figure.shot{margin:2.2rem 0;padding:10px;border:2px solid var(--ink);background:var(--sheet-tint)}figure.shot img{display:block;width:100%;height:auto}.post{font-size:1.06rem}.post>*:first-child{margin-top:0}.post h2{font-size:1.65rem;font-weight:700;margin:2.8em 0 1em;scroll-margin-top:90px}.post h2:before{content:"";display:inline-block;width:9px;height:9px;background:var(--orange);margin-right:12px}.post h3{font-size:1.25rem;font-weight:700;margin:2.2em 0 .9em;scroll-margin-top:90px}.post h4{font-size:1.05rem;font-weight:700;margin:1.8em 0 .7em}.post p{margin:0 0 1.35em}.post ul,.post ol{margin:0 0 1.5em;padding-left:1.5rem}.post li{margin-bottom:.5em}.post li::marker{color:var(--orange)}.post blockquote{margin:2em 0;padding:1.2rem 1.5rem;border-left:3px solid var(--orange);background:var(--orange-soft)}.post blockquote p{margin:0}.post hr{border:0;border-top:1px solid var(--line);margin:2.5em 0}.post table{width:100%;border-collapse:collapse;margin:0 0 1.8em;font-size:.95rem;display:block;overflow-x:auto}.post th,.post td{border:1px solid var(--line);padding:.7rem .9rem;text-align:left}.post th{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.06em;text-transform:uppercase;background:var(--wash);font-weight:500}.post img{border:1px solid var(--line)}.post code,.prose code{font-family:var(--font-mono);font-size:.86em;background:var(--wash);padding:.15em .4em;border:1px solid var(--line)}.post pre,.prose pre{background:var(--ink);color:#ededef;padding:1.4rem 1.5rem;overflow-x:auto;margin:0 0 1.8em;font-size:.88rem;line-height:1.65}.post pre code,.prose pre code{background:none;border:0;padding:0;color:inherit}.related{margin:4rem 0 0}.cta-box{border:2px solid var(--ink);background:var(--paper);padding:2.4rem;margin:4rem 0 5rem;display:flex;align-items:center;justify-content:space-between;gap:2rem;flex-wrap:wrap}.cta-box h3{font-size:1.4rem;font-weight:800;margin:0 0 .4rem}.cta-box p{color:var(--muted);margin:0}.cta-box .fmt{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.1em;color:var(--faint);display:block;margin-bottom:.7rem}.prose h1{font-size:clamp(2rem,4.4vw,2.9rem);font-weight:800;margin:0 0 1.2rem}.prose h2{font-size:1.5rem;font-weight:700;margin:2.4em 0 .9em}.prose h3{font-size:1.15rem;font-weight:700;margin:2em 0 .8em}.prose p{margin:0 0 1.3em}.prose ul,.prose ol{margin:0 0 1.5em;padding-left:1.5rem}.prose li{margin-bottom:.5em}.prose li::marker{color:var(--orange)}.pagination{display:flex;gap:.6rem;margin-top:2.5rem;font-family:var(--font-mono);font-size:.85rem;flex-wrap:wrap}.pagination a,.pagination .current{border:1px solid var(--line);padding:.55rem .95rem;color:var(--muted);background:var(--paper)}.pagination a:hover{border-color:var(--orange);color:var(--orange)}.pagination .current{background:var(--ink);border-color:var(--ink);color:#fff}.site-footer{border-top:2px solid var(--ink);background:var(--paper);margin-top:5rem}.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:3rem;padding:3.5rem 0}.foot-brand{display:inline-flex;align-items:center;gap:.6rem;font-family:var(--font-display);font-weight:800;font-size:1.15rem;margin:0 0 1rem;color:var(--ink)}.foot-brand svg{display:block}.foot-grid p.desc{color:var(--muted);font-size:.95rem;margin:0 0 1rem;max-width:38ch}.foot-grid .email{font-family:var(--font-mono);font-size:.85rem;color:var(--muted)}.foot-grid .email:hover{color:var(--orange)}.site-footer h4{font-family:var(--font-mono);font-size:.7rem;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);margin:0 0 1.1rem}.site-footer ul{list-style:none;margin:0;padding:0}.site-footer ul li{margin-bottom:.6rem}.site-footer ul a{color:var(--muted);font-size:.93rem}.site-footer ul a:hover{color:var(--orange)}.footer-bottom{border-top:1px solid var(--line)}.footer-bottom .wrap{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-top:1.2rem;padding-bottom:1.2rem;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.04em;color:var(--faint)}@media(max-width:760px){.foot-grid{grid-template-columns:1fr;gap:2.2rem;padding:2.6rem 0}}.simple-form{max-width:560px;display:grid;gap:1rem}.simple-form label{font-weight:600;font-size:.92rem;display:grid;gap:.35rem}.simple-form input,.simple-form textarea{font:inherit;padding:.7rem .9rem;border:1px solid var(--line);background:var(--paper)}.simple-form input:focus,.simple-form textarea:focus{outline:2px solid var(--orange);border-color:var(--orange)}.skip-link:focus{position:static!important}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:1ms!important;transition-duration:1ms!important}}.nl-strip{border-bottom:2px solid var(--ink)}.nl-strip .wrap{display:grid;grid-template-columns:1fr 1fr;gap:2.5rem;align-items:center;padding-top:2.8rem;padding-bottom:2.8rem}.nl-kicker{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);margin:0 0 .6rem}.nl-strip h3,.nl-box h3{font-family:var(--font-display);font-size:1.35rem;margin:0 0 .5rem;letter-spacing:-.01em}.nl-strip p.nl-sub,.nl-box p.nl-sub{color:var(--muted);font-size:.95rem;margin:0;max-width:44ch}.nl-form{display:grid;gap:.5rem}.nl-label{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}.nl-row{display:grid;grid-template-columns:1fr auto;gap:0}.nl-row input[type=email]{font:inherit;padding:.75rem 1rem;border:2px solid var(--ink);border-right:0;background:var(--paper);min-width:0}.nl-row input[type=email]:focus{outline:2px solid var(--orange);outline-offset:-2px}.nl-hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}.nl-btn{font-family:var(--font-mono);font-size:.85rem;letter-spacing:.06em;text-transform:uppercase;background:var(--orange);color:#fff;border:2px solid var(--ink);padding:.75rem 1.4rem;cursor:pointer}.nl-btn:hover{background:var(--ink)}.nl-btn:disabled{opacity:.6;cursor:wait}.nl-msg{font-family:var(--font-mono);font-size:.85rem;margin:.2rem 0 0}.nl-msg.nl-ok{color:#0a7a3d}.nl-msg.nl-err{color:#b00020}.nl-fine{font-family:var(--font-mono);font-size:.7rem;color:var(--faint);margin:0}.nl-box{border:2px solid var(--ink);background:var(--sheet-tint);padding:2rem;margin-top:3rem;display:grid;gap:1rem}.nl-box .nl-row{max-width:520px}@media(max-width:760px){.nl-strip .wrap{grid-template-columns:1fr;gap:1.5rem;padding-top:2.2rem;padding-bottom:2.2rem}.nl-box{padding:1.4rem}}