:root{--ch-base:#f4f0e6;--ch-card:#fff;--ch-band:#eee9dc;--ch-well:#e7e1d1;--ch-hair:#ded7c6;--ch-hair-firm:#c6bda6;--ch-fg:#1f1d1a;--ch-fg-dim:#5f5a52;--ch-fg-quiet:#69635b;--ch-key:#17554f;--ch-key-deep:#0f3c37;--ch-key-wash:#e0eae6;--ch-key-wash-firm:#d0e0da;--ch-on-key:#fff;--ch-tie:#17554f;--ch-tie-seen:#4d4a63;--ch-ok:#1e7a3c;--ch-hold:#7e601b;--ch-bad:#b3261e;--ch-mark-fresh-bg:#e2eddf;--ch-mark-fresh-fg:#1e5c2a;--ch-mark-flat-bg:#ebe5d6;--ch-mark-flat-fg:#4a4640;--ch-mark-hold-bg:#f1e7d2;--ch-mark-hold-fg:#6d4f0e;--ch-ring:#17554f;--ch-scrim:#1f1d1a75;--ch-ink-teal:#35706a;--ch-ink-wine:#7a2e3a;--ch-ink-olive:#56682c;--ch-ink-amber:#7e601b;--ch-ink-sumi:#3a3a38;--ch-wash-teal:#e3ece9;--ch-wash-wine:#f0e3e4;--ch-wash-olive:#e9ecdd;--ch-wash-amber:#f1e9d6;--ch-wash-sumi:#e8e5dd;--ch-tag-1:var(--ch-ink-wine);--ch-tag-2:var(--ch-ink-teal);--ch-tag-3:var(--ch-ink-amber);--ch-tag-4:var(--ch-ink-olive);--ch-tag-5:var(--ch-ink-sumi);--ch-tag-6:var(--ch-ink-teal);--ch-tag-7:var(--ch-ink-wine);--ch-tag-8:var(--ch-ink-amber);--ch-tag-9:var(--ch-ink-sumi);--ch-tag-1-wash:var(--ch-wash-wine);--ch-tag-2-wash:var(--ch-wash-teal);--ch-tag-3-wash:var(--ch-wash-amber);--ch-tag-4-wash:var(--ch-wash-olive);--ch-tag-5-wash:var(--ch-wash-sumi);--ch-tag-6-wash:var(--ch-wash-teal);--ch-tag-7-wash:var(--ch-wash-wine);--ch-tag-8-wash:var(--ch-wash-amber);--ch-tag-9-wash:var(--ch-wash-sumi);--ch-tag:var(--ch-ink-sumi);--ch-tag-wash:var(--ch-wash-sumi);--ch-type-title:"Gowun Batang", "Apple SD Gothic Neo", Georgia, serif;--ch-type-text:"Gowun Dodum", "Apple SD Gothic Neo", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;--ch-type-figure:"Nanum Gothic Coding", ui-monospace, SFMono-Regular, Consolas, monospace;--ch-size-banner:40px;--ch-size-title:32px;--ch-size-head:24px;--ch-size-sub:19px;--ch-size-lede:17px;--ch-size-read:16px;--ch-size-ui:15px;--ch-size-fine:13px;--ch-size-tiny:12px;--ch-gap-3xs:4px;--ch-gap-2xs:8px;--ch-gap-xs:12px;--ch-gap-sm:16px;--ch-gap-md:24px;--ch-gap-lg:32px;--ch-gap-xl:48px;--ch-gap-2xl:64px;--ch-gap-3xl:96px;--ch-round-tight:4px;--ch-round-soft:6px;--ch-round-card:8px;--ch-round-wide:12px;--ch-round-pill:999px;--ch-lift-0:none;--ch-lift-1:0 1px 2px #1f1d1a0d, 0 4px 12px #1f1d1a0d;--ch-lift-2:0 2px 4px #1f1d1a12, 0 12px 32px #1f1d1a17;--ch-tick:.12s;--ch-beat:.18s;--ch-sweep:.24s;--ch-curve:cubic-bezier(.2, 0, 0, 1);--ch-shell:1120px;--ch-column:720px;--ch-margin:16px;--ch-masthead-h:56px}@media (width>=768px){:root{--ch-margin:24px;--ch-masthead-h:64px}}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:calc(var(--ch-masthead-h) + 52px);-webkit-text-size-adjust:100%}body{background:var(--ch-base);color:var(--ch-fg);font-family:var(--ch-type-text);font-size:var(--ch-size-ui);word-break:keep-all;overflow-wrap:anywhere;margin:0;line-height:1.65}h1,h2,h3,h4{font-family:var(--ch-type-title);color:var(--ch-fg);word-break:keep-all;overflow-wrap:anywhere;margin:0}h1{font-size:var(--ch-size-title);letter-spacing:-.02em;font-weight:700;line-height:1.28}h2{font-size:var(--ch-size-head);letter-spacing:-.016em;font-weight:700;line-height:1.32}h3{font-size:var(--ch-size-sub);letter-spacing:-.01em;font-weight:700;line-height:1.38}p{margin:0 0 var(--ch-gap-sm)}ul,ol{margin:0 0 var(--ch-gap-sm);padding-left:22px}img{max-width:100%;height:auto}a{color:var(--ch-tie);text-decoration:none}a:hover{color:var(--ch-key-deep)}:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--ch-ring);outline-offset:2px;border-radius:var(--ch-round-tight)}.ch-fig{font-family:var(--ch-type-figure);font-variant-numeric:tabular-nums}.ch-jump{z-index:200;background:var(--ch-key);color:var(--ch-on-key);border-radius:0 0 var(--ch-round-soft) 0;padding:10px 16px;font-weight:700;position:absolute;top:0;left:-9999px}.ch-jump:focus{color:var(--ch-on-key);left:0}.ch-offscreen{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.ch-shell{max-width:var(--ch-shell);padding-left:var(--ch-margin);padding-right:var(--ch-margin);margin:0 auto}.ch-column{max-width:var(--ch-column)}.ch-masthead{z-index:50;background:var(--ch-card);border-bottom:1px solid var(--ch-hair);transition:box-shadow var(--ch-beat) var(--ch-curve);position:sticky;top:0}.ch-masthead.ch-is-lifted{box-shadow:var(--ch-lift-1)}.ch-masthead-row{max-width:var(--ch-shell);padding:0 var(--ch-margin);height:var(--ch-masthead-h);align-items:center;gap:var(--ch-gap-xs);margin:0 auto;display:flex}.ch-wordmark{align-items:center;gap:var(--ch-gap-2xs);color:var(--ch-fg);flex:none;display:inline-flex}.ch-wordmark:hover{color:var(--ch-fg)}.ch-wordmark-text{font-family:var(--ch-type-title);font-weight:700;font-size:var(--ch-size-sub);letter-spacing:-.015em}.ch-find{flex:auto;max-width:420px;margin:0 auto}.ch-masthead-links{gap:var(--ch-gap-3xs);flex:none;display:none}.ch-masthead-links a{height:36px;font-size:var(--ch-size-fine);color:var(--ch-fg-dim);border-radius:var(--ch-round-soft);align-items:center;padding:0 10px;display:inline-flex}.ch-masthead-links a:hover{background:var(--ch-band);color:var(--ch-fg)}.ch-masthead-links a[aria-current=page]{color:var(--ch-fg);font-weight:700}.ch-glyph{border-radius:var(--ch-round-soft);min-width:44px;height:44px;font-family:inherit;font-size:var(--ch-size-fine);color:var(--ch-fg-dim);cursor:pointer;background:0 0;border:none;flex:none;justify-content:center;align-items:center;padding:0 10px;display:inline-flex}.ch-glyph:hover{background:var(--ch-band)}.ch-seek{align-items:center;display:flex;position:relative}.ch-seek input{background:var(--ch-card);width:100%;height:40px;color:var(--ch-fg);border:1px solid var(--ch-hair-firm);border-radius:var(--ch-round-soft);font-family:inherit;font-size:var(--ch-size-ui);padding:0 60px 0 12px}.ch-seek input::placeholder{color:var(--ch-fg-quiet)}.ch-seek input:focus{border-color:var(--ch-key);box-shadow:0 0 0 3px var(--ch-key-wash);outline-offset:3px}.ch-seek button{border-radius:var(--ch-round-soft);height:36px;font-family:inherit;font-size:var(--ch-size-fine);color:var(--ch-fg-dim);cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;padding:0 12px;display:inline-flex;position:absolute;right:2px}.ch-seek button:hover{background:var(--ch-band);color:var(--ch-fg)}.ch-find-drop{border-bottom:1px solid var(--ch-hair);background:var(--ch-card);padding:var(--ch-gap-2xs) var(--ch-margin);display:none}.ch-find-drop.ch-is-open{display:block}.ch-strip{top:var(--ch-masthead-h);z-index:40;background:var(--ch-card);border-bottom:1px solid var(--ch-hair);position:sticky}.ch-strip-rail{max-width:var(--ch-shell);padding:0 var(--ch-margin);scrollbar-width:none;gap:2px;margin:0 auto;display:flex;overflow-x:auto}.ch-strip-rail::-webkit-scrollbar{display:none}.ch-strip a{white-space:nowrap;height:44px;font-size:var(--ch-size-ui);color:var(--ch-fg-dim);border-left:3px solid var(--ch-tag);border-bottom:2px solid #0000;align-items:center;padding:0 12px;display:inline-flex}.ch-strip a.ch-strip-all{border-left-color:var(--ch-hair-firm)}.ch-strip a:hover{background:var(--ch-key-wash);color:var(--ch-fg)}.ch-strip a[aria-current=page]{color:var(--ch-fg);border-bottom-color:var(--ch-key);font-weight:700}.ch-scrim{background:var(--ch-scrim);opacity:0;visibility:hidden;z-index:90;transition:opacity var(--ch-sweep) var(--ch-curve), visibility var(--ch-sweep);position:fixed;inset:0}body.ch-drawer-open .ch-scrim{opacity:1;visibility:visible}.ch-drawer{background:var(--ch-card);width:280px;max-width:86vw;box-shadow:var(--ch-lift-2);z-index:100;transition:transform var(--ch-sweep) var(--ch-curve);padding-bottom:var(--ch-gap-lg);position:fixed;top:0;bottom:0;left:0;overflow-y:auto;transform:translate(-100%)}body.ch-drawer-open .ch-drawer{transform:translate(0)}.ch-drawer[hidden]{display:none}.ch-drawer-top{height:var(--ch-masthead-h);padding:0 var(--ch-gap-xs) 0 var(--ch-gap-sm);border-bottom:1px solid var(--ch-hair);justify-content:space-between;align-items:center;display:flex}.ch-drawer-label{font-size:var(--ch-size-tiny);letter-spacing:.06em;color:var(--ch-fg-quiet);text-transform:uppercase;font-weight:700;font-family:var(--ch-type-text);padding:var(--ch-gap-md) var(--ch-gap-sm) var(--ch-gap-2xs);margin:0}.ch-drawer a{align-items:center;gap:var(--ch-gap-xs);min-height:44px;padding:0 var(--ch-gap-sm);color:var(--ch-fg);font-size:var(--ch-size-ui);border-left:3px solid #0000;display:flex}.ch-drawer a.ch-drawer-topic{border-left-color:var(--ch-tag)}.ch-drawer a:hover{background:var(--ch-band)}.ch-drawer a .ch-drawer-count{font-family:var(--ch-type-figure);font-variant-numeric:tabular-nums;font-size:var(--ch-size-tiny);color:var(--ch-fg-dim);margin-left:auto}@media (width>=768px){.ch-drawer,.ch-scrim{display:none}}.ch-sheet{max-width:var(--ch-shell);padding:var(--ch-gap-lg) var(--ch-margin) var(--ch-gap-2xl);margin:0 auto}.ch-sheet-slim{max-width:var(--ch-column)}.ch-sheet-head{margin-bottom:var(--ch-gap-md)}.ch-sheet-head h1{margin-bottom:var(--ch-gap-2xs)}.ch-sheet-sub{color:var(--ch-fg-dim);font-size:var(--ch-size-fine);margin:0}.ch-trail{font-size:var(--ch-size-fine);color:var(--ch-fg-dim);margin-bottom:var(--ch-gap-xs)}.ch-trail a{color:var(--ch-fg-dim)}.ch-trail a:hover{color:var(--ch-key);text-decoration:underline}.ch-trail>*+:before{content:"/";color:var(--ch-fg-quiet);padding:0 6px}.ch-split{display:block}.ch-toc{display:none}@media (width>=1024px){.ch-split{gap:var(--ch-gap-xl);grid-template-columns:200px minmax(0,1fr);align-items:start;display:grid}.ch-toc{top:calc(var(--ch-masthead-h) + 60px);display:block;position:sticky}.ch-toc-label{font-family:var(--ch-type-text);font-size:var(--ch-size-tiny);letter-spacing:.06em;color:var(--ch-fg-quiet);text-transform:uppercase;margin:0 0 var(--ch-gap-xs);font-weight:700}.ch-toc a{align-items:center;gap:var(--ch-gap-2xs);font-size:var(--ch-size-fine);color:var(--ch-fg-dim);border-left:3px solid #0000;padding:7px 10px;display:flex}.ch-toc a:hover{color:var(--ch-fg);background:var(--ch-band)}.ch-toc a.ch-is-here{color:var(--ch-fg);border-left-color:var(--ch-key);font-weight:700}.ch-toc-count{font-family:var(--ch-type-figure);font-size:var(--ch-size-tiny);color:var(--ch-fg-dim);margin-left:auto}}.ch-part{margin-bottom:var(--ch-gap-lg)}@media (width>=768px){.ch-part{margin-bottom:var(--ch-gap-xl)}}.ch-part-head{justify-content:space-between;align-items:baseline;gap:var(--ch-gap-xs);margin-bottom:var(--ch-gap-sm);display:flex}.ch-part-head h2{font-size:var(--ch-size-head)}.ch-onward{font-size:var(--ch-size-fine);color:var(--ch-key);white-space:nowrap}.ch-onward:hover{text-decoration:underline}.ch-panel{border-left:4px solid var(--ch-key);background:var(--ch-key-wash);border-radius:var(--ch-round-card);padding:var(--ch-gap-sm) var(--ch-gap-md)}.ch-panel-plain{border-left-color:var(--ch-hair-firm);background:var(--ch-band)}.ch-panel h2,.ch-panel h3{font-size:var(--ch-size-sub);margin-bottom:var(--ch-gap-xs)}.ch-panel>:last-child{margin-bottom:0}.ch-fresh{gap:var(--ch-gap-3xs) var(--ch-gap-md);grid-template-columns:minmax(0,1fr);margin:0;padding:0;list-style:none;display:grid}@media (width>=480px){.ch-fresh{grid-template-columns:repeat(2,minmax(0,1fr))}}.ch-fresh li{align-items:center;gap:var(--ch-gap-2xs);border-left:3px solid var(--ch-tag);min-width:0;min-height:32px;padding-left:var(--ch-gap-2xs);display:flex}.ch-fresh a{color:var(--ch-fg);font-size:var(--ch-size-fine);text-overflow:ellipsis;white-space:nowrap;flex:auto;min-width:0;overflow:hidden}.ch-fresh a:hover{color:var(--ch-key);text-decoration:underline}.ch-block-grid{gap:var(--ch-gap-sm);grid-template-columns:1fr;display:grid}@media (width>=768px){.ch-block-grid{gap:var(--ch-gap-md);grid-template-columns:repeat(2,minmax(0,1fr))}}.ch-topic-card{background:var(--ch-card);border:1px solid var(--ch-hair);border-radius:var(--ch-round-card);scroll-margin-top:calc(var(--ch-masthead-h) + 60px);overflow:hidden}.ch-topic-card-top{justify-content:space-between;align-items:center;gap:var(--ch-gap-xs);min-height:44px;padding:0 var(--ch-gap-sm);background:var(--ch-band);border-bottom:1px solid var(--ch-hair);border-left:3px solid var(--ch-tag);display:flex}.ch-topic-card-top h3{letter-spacing:-.01em;font-size:17px}.ch-topic-total{font-size:var(--ch-size-fine);color:var(--ch-fg-dim);font-weight:400}.ch-topic-card ul{padding:var(--ch-gap-2xs) 0;margin:0;list-style:none}.ch-entry a{align-items:center;gap:var(--ch-gap-xs);height:34px;padding:0 var(--ch-gap-sm);color:var(--ch-fg);font-size:var(--ch-size-fine);display:flex}.ch-entry a:hover{background:var(--ch-band);color:var(--ch-key)}.ch-entry-name{text-overflow:ellipsis;white-space:nowrap;flex:auto;min-width:0;overflow:hidden}.ch-entry-when{font-family:var(--ch-type-figure);font-variant-numeric:tabular-nums;font-size:var(--ch-size-tiny);color:var(--ch-fg-dim);flex:none}.ch-topic-empty{padding:var(--ch-gap-sm);color:var(--ch-fg-dim);font-size:var(--ch-size-fine)}.ch-topic-note{padding:0 var(--ch-gap-sm) var(--ch-gap-xs);color:var(--ch-fg-dim);font-size:var(--ch-size-tiny);margin:0}.ch-ledger{background:var(--ch-card);border:1px solid var(--ch-hair);border-radius:var(--ch-round-card);overflow:hidden}.ch-ledger-head{padding:10px var(--ch-gap-sm);background:var(--ch-band);border-bottom:1px solid var(--ch-hair);font-size:var(--ch-size-tiny);color:var(--ch-fg-dim);letter-spacing:.01em;font-weight:700;display:none}.ch-line{padding:12px var(--ch-gap-sm);border-bottom:1px solid var(--ch-hair);color:var(--ch-fg);transition:background-color var(--ch-tick) var(--ch-curve);display:block;position:relative}.ch-line:last-child{border-bottom:none}.ch-line:before{content:"";background:var(--ch-tag);width:0;transition:width var(--ch-tick) var(--ch-curve);position:absolute;top:0;bottom:0;left:0}.ch-line:hover{background:var(--ch-band);color:var(--ch-fg)}.ch-line:hover:before{width:3px}.ch-line-name{font-size:var(--ch-size-ui);color:var(--ch-fg);-webkit-line-clamp:2;-webkit-box-orient:vertical;margin-bottom:6px;display:-webkit-box;overflow:hidden}.ch-line-facts{align-items:center;gap:var(--ch-gap-2xs);font-size:var(--ch-size-fine);color:var(--ch-fg-dim);flex-wrap:wrap;display:flex}.ch-line-facts .ch-fig{color:var(--ch-fg-dim)}@media (width>=768px){.ch-ledger-head{gap:var(--ch-gap-xs);grid-template-columns:96px minmax(0,1fr) 92px 76px 92px 64px;align-items:center;display:grid}.ch-ledger-head span:nth-child(n+4){text-align:right}.ch-line{gap:var(--ch-gap-xs);grid-template-columns:96px minmax(0,1fr) 92px 76px 92px 64px;align-items:center;display:grid}.ch-line>.ch-mark{justify-self:start}.ch-line-name{-webkit-line-clamp:1;margin-bottom:0}.ch-line-facts{display:contents}.ch-line-facts>*{font-size:var(--ch-size-fine);text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.ch-col-views,.ch-col-size,.ch-col-date{text-align:right}}.ch-mark{border-radius:var(--ch-round-tight);height:20px;font-size:var(--ch-size-tiny);letter-spacing:.01em;background:var(--ch-mark-flat-bg);color:var(--ch-mark-flat-fg);white-space:nowrap;align-items:center;padding:0 8px;font-weight:700;display:inline-flex}.ch-mark-topic{background:var(--ch-tag-wash);color:var(--ch-fg);border-left:3px solid var(--ch-tag);border-radius:0 var(--ch-round-tight) var(--ch-round-tight) 0;padding-left:6px}.ch-mark-new{background:var(--ch-mark-fresh-bg);color:var(--ch-mark-fresh-fg)}.ch-mark-hold{background:var(--ch-mark-hold-bg);color:var(--ch-mark-hold-fg)}.ch-aside-note{margin-top:var(--ch-gap-xs);font-size:var(--ch-size-fine);color:var(--ch-fg-dim)}.ch-leafer{justify-content:center;align-items:center;gap:var(--ch-gap-3xs);margin-top:var(--ch-gap-lg);flex-wrap:wrap;display:flex}.ch-leafer a,.ch-leafer span{border-radius:var(--ch-round-tight);min-width:36px;height:36px;font-family:var(--ch-type-figure);font-size:var(--ch-size-fine);color:var(--ch-fg-dim);justify-content:center;align-items:center;padding:0 10px;display:inline-flex}.ch-leafer a:hover{background:var(--ch-band);color:var(--ch-fg)}.ch-leafer .ch-is-here{background:var(--ch-well);color:var(--ch-fg);font-weight:700}.ch-leafer .ch-is-off{color:var(--ch-fg-quiet)}.ch-leafer-edge{font-family:var(--ch-type-text)}.ch-leafer-gap{color:var(--ch-fg-quiet)}.ch-entry-facts{align-items:center;gap:var(--ch-gap-xs);font-size:var(--ch-size-fine);color:var(--ch-fg-dim);margin-bottom:var(--ch-gap-md);flex-wrap:wrap;display:flex}.ch-divider{background:var(--ch-hair-firm);width:1px;height:12px}.ch-grab{align-items:center;gap:var(--ch-gap-sm);min-height:72px;padding:var(--ch-gap-sm) var(--ch-gap-md);margin-bottom:var(--ch-gap-md);border-left:4px solid var(--ch-key);background:var(--ch-key-wash);border-radius:var(--ch-round-card);color:var(--ch-fg);transition:background-color var(--ch-beat) var(--ch-curve);display:flex}.ch-grab:hover{background:var(--ch-key-wash-firm);color:var(--ch-fg)}.ch-grab-main{flex:auto;min-width:0;display:block}.ch-grab-name{font-size:var(--ch-size-ui);text-overflow:ellipsis;white-space:nowrap;font-weight:700;display:block;overflow:hidden}.ch-grab-tags{gap:var(--ch-gap-2xs);flex-wrap:wrap;margin-top:6px;display:flex}.ch-grab-go{color:var(--ch-key);flex:none;align-items:center;font-weight:700;display:inline-flex}.ch-filelist{margin:0 0 var(--ch-gap-md);padding:0 0 0 var(--ch-gap-md);border-left:4px solid #0000;list-style:none}.ch-filelist li{gap:var(--ch-gap-xs);font-size:var(--ch-size-fine);color:var(--ch-fg-dim);border-bottom:1px solid var(--ch-hair);justify-content:space-between;padding:6px 0;display:flex}.ch-filelist li:last-child{border-bottom:none}.ch-filename{text-overflow:ellipsis;white-space:nowrap;flex:auto;min-width:0;overflow:hidden}.ch-prose{font-size:var(--ch-size-read);color:var(--ch-fg);margin-bottom:var(--ch-gap-lg);line-height:1.75}.ch-prose img{border-radius:var(--ch-round-card);max-width:100%;height:auto;margin:var(--ch-gap-xs) auto;display:block}.ch-prose a{color:var(--ch-tie);text-decoration:underline}.ch-prose a:visited{color:var(--ch-tie-seen)}.ch-prose p{margin:0 0 var(--ch-gap-sm)}.ch-prose table{border-collapse:collapse;max-width:100%;display:block;overflow-x:auto}.ch-prose td,.ch-prose th{border:1px solid var(--ch-hair);padding:6px 10px}.ch-keywords{gap:var(--ch-gap-2xs);margin-bottom:var(--ch-gap-md);flex-wrap:wrap;display:flex}.ch-keyword{background:var(--ch-band);border:1px solid var(--ch-hair);border-radius:var(--ch-round-tight);height:28px;font-size:var(--ch-size-fine);color:var(--ch-fg-dim);align-items:center;padding:0 10px;display:inline-flex}.ch-keyword:hover{background:var(--ch-key-wash);border-color:var(--ch-key-wash);color:var(--ch-key)}.ch-cta{margin-bottom:var(--ch-gap-lg)}.ch-cta-note{margin:var(--ch-gap-2xs) 0 0;font-size:var(--ch-size-fine);color:var(--ch-fg-dim)}.ch-act{justify-content:center;align-items:center;gap:var(--ch-gap-2xs);border-radius:var(--ch-round-soft);height:40px;font-family:inherit;font-size:var(--ch-size-ui);cursor:pointer;text-align:center;transition:background-color var(--ch-beat) var(--ch-curve), border-color var(--ch-beat) var(--ch-curve), color var(--ch-beat) var(--ch-curve);border:1px solid #0000;padding:0 16px;font-weight:700;display:inline-flex}.ch-act-key{background:var(--ch-key);color:var(--ch-on-key)}.ch-act-key:hover{background:var(--ch-key-deep);color:var(--ch-on-key)}.ch-act-plain{background:var(--ch-card);border-color:var(--ch-hair-firm);color:var(--ch-fg)}.ch-act-plain:hover{background:var(--ch-key-wash);border-color:var(--ch-key);color:var(--ch-fg)}.ch-act-bare{color:var(--ch-fg-dim);background:0 0}.ch-act-bare:hover{background:var(--ch-band);color:var(--ch-fg)}.ch-act-wide{width:100%;height:52px;font-size:var(--ch-size-lede);font-weight:700}.ch-act-tiny{height:32px;font-size:var(--ch-size-fine);padding:0 12px}.ch-act[disabled],.ch-act[aria-disabled=true]{background:var(--ch-band);border-color:var(--ch-hair);color:var(--ch-fg-quiet);cursor:not-allowed;pointer-events:none}.ch-act[aria-busy=true]{pointer-events:none;opacity:.7}.ch-act.ch-is-marked{color:var(--ch-bad);font-weight:700}.ch-act-row{gap:var(--ch-gap-2xs);margin-bottom:var(--ch-gap-lg);flex-wrap:wrap;display:flex}.ch-board-tabs{scrollbar-width:none;border-bottom:1px solid var(--ch-hair);margin-bottom:var(--ch-gap-md);gap:2px;display:flex;overflow-x:auto}.ch-board-tabs::-webkit-scrollbar{display:none}.ch-board-tabs a{height:44px;padding:0 var(--ch-gap-sm);white-space:nowrap;font-size:var(--ch-size-ui);color:var(--ch-fg-dim);border-bottom:2px solid #0000;align-items:center;display:inline-flex}.ch-board-tabs a:hover{background:var(--ch-key-wash);color:var(--ch-fg)}.ch-board-tabs a[aria-current=page]{color:var(--ch-fg);border-bottom-color:var(--ch-key);font-weight:700}.ch-board{gap:var(--ch-gap-xs);flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.ch-board-item{align-items:flex-start;gap:var(--ch-gap-sm);background:var(--ch-card);border:1px solid var(--ch-hair);border-radius:var(--ch-round-card);padding:var(--ch-gap-sm);display:flex}.ch-board-item.ch-is-lead{border-top:3px solid var(--ch-key)}.ch-board-no{font-family:var(--ch-type-title);color:var(--ch-fg-quiet);flex:0 0 36px;font-size:24px;font-weight:700;line-height:1.2}.ch-board-item.ch-is-upper .ch-board-no{color:var(--ch-key)}.ch-board-logo{border-radius:var(--ch-round-card);background:var(--ch-band);object-fit:contain;flex:0 0 48px;width:48px;height:48px}.ch-board-initial{border-radius:var(--ch-round-card);background:var(--ch-wash-sumi);width:48px;height:48px;color:var(--ch-fg);font-family:var(--ch-type-title);flex:0 0 48px;justify-content:center;align-items:center;font-size:20px;font-weight:700;display:inline-flex}.ch-board-body{flex:auto;min-width:0;display:block}.ch-board-name{font-family:var(--ch-type-title);font-size:17px;font-weight:700;display:block}.ch-board-name a{color:var(--ch-fg)}.ch-board-name a:hover{color:var(--ch-key);text-decoration:underline}.ch-board-desc{font-size:var(--ch-size-fine);color:var(--ch-fg-dim);margin:4px 0 0;display:block}.ch-board-marks{margin-top:var(--ch-gap-2xs);flex-wrap:wrap;gap:6px;display:flex}.ch-board-go{flex:none;align-self:center}@media (width<=599px){.ch-board-item{flex-wrap:wrap}.ch-board-go{flex:100%}.ch-board-go .ch-act{width:100%}}.ch-article{font-size:var(--ch-size-read);color:var(--ch-fg);line-height:1.85}.ch-article h2{font-size:var(--ch-size-head);margin:var(--ch-gap-xl) 0 var(--ch-gap-xs)}.ch-article h3{font-size:var(--ch-size-sub);margin:var(--ch-gap-md) 0 var(--ch-gap-2xs)}.ch-article p{margin:0 0 var(--ch-gap-sm)}.ch-article ul{margin:0 0 var(--ch-gap-sm);padding-left:22px}.ch-article li{margin-bottom:6px}.ch-lede{font-size:var(--ch-size-lede);line-height:1.8}.ch-qa{border-top:1px solid var(--ch-hair);margin-top:var(--ch-gap-lg)}.ch-qa details{border-bottom:1px solid var(--ch-hair)}.ch-qa summary{justify-content:space-between;align-items:center;gap:var(--ch-gap-xs);min-height:52px;padding:var(--ch-gap-xs) var(--ch-gap-sm);font-family:var(--ch-type-title);font-size:var(--ch-size-lede);cursor:pointer;font-weight:700;list-style:none;display:flex}.ch-qa summary h3{font:inherit;margin:0}.ch-qa summary::-webkit-details-marker{display:none}.ch-qa summary:after{content:"+";font-family:var(--ch-type-figure);color:var(--ch-fg-dim);flex:none;font-size:20px}.ch-qa details[open] summary:after{content:"-"}.ch-qa-answer{border-left:4px solid var(--ch-hair-firm);background:var(--ch-band);border-radius:var(--ch-round-card);padding:var(--ch-gap-sm);margin:0 var(--ch-gap-sm) var(--ch-gap-sm);font-size:var(--ch-size-read);line-height:1.75}.ch-qa-answer p:last-child{margin-bottom:0}.ch-service-head{align-items:center;gap:var(--ch-gap-sm);margin-bottom:var(--ch-gap-md);display:flex}.ch-service-head .ch-board-logo,.ch-service-head .ch-board-initial{flex:0 0 64px;width:64px;height:64px;font-size:26px}.ch-spec{border-collapse:collapse;width:100%;margin-bottom:var(--ch-gap-lg);font-size:var(--ch-size-fine);table-layout:fixed}.ch-spec th,.ch-spec td{border:1px solid var(--ch-hair);text-align:left;vertical-align:top;padding:10px 12px}.ch-spec th{background:var(--ch-band);width:120px;color:var(--ch-fg-dim);font-weight:700}.ch-asis{white-space:pre-wrap;font-size:var(--ch-size-read);line-height:1.85}.ch-plate-grid{gap:var(--ch-gap-sm);grid-template-columns:repeat(2,minmax(0,1fr));margin:0;padding:0;list-style:none;display:grid}@media (width>=480px){.ch-plate-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (width>=1024px){.ch-plate-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}@media (width>=1280px){.ch-plate-grid{grid-template-columns:repeat(6,minmax(0,1fr))}}.ch-plate-row{scroll-snap-type:x proximity;padding-bottom:var(--ch-gap-2xs);overscroll-behavior-x:contain;grid-template-columns:none;grid-auto-columns:42%;grid-auto-flow:column;overflow-x:auto}.ch-plate-row>li{scroll-snap-align:start}@media (width>=480px){.ch-plate-row{grid-auto-columns:28%}}@media (width>=900px){.ch-plate-row{grid-template-columns:repeat(6,minmax(0,1fr));grid-auto-columns:auto;grid-auto-flow:row;overflow-x:visible}}.ch-plate{color:var(--ch-fg);display:block}.ch-plate-frame{aspect-ratio:2/3;background:var(--ch-band);border-radius:var(--ch-round-wide);margin-bottom:var(--ch-gap-2xs);display:block;position:relative;overflow:hidden}.ch-plate-frame img{object-fit:cover;width:100%;height:100%;display:block}.ch-plate-frame:after{content:"";border-radius:var(--ch-round-wide);transition:border-color var(--ch-beat) var(--ch-curve);border:1px solid #0000;position:absolute;inset:0}.ch-plate:hover .ch-plate-frame:after{border-color:var(--ch-key)}.ch-plate:hover .ch-plate-name{color:var(--ch-key)}.ch-plate-name{-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:14px;font-weight:700;line-height:1.45;display:-webkit-box;overflow:hidden}.ch-plate-sub{font-size:var(--ch-size-fine);color:var(--ch-fg-dim);margin-top:2px;display:block}.ch-switch{gap:var(--ch-gap-3xs);margin-bottom:var(--ch-gap-sm);flex-wrap:wrap;display:flex}.ch-switch button{border-radius:var(--ch-round-soft);border:1px solid var(--ch-hair);height:34px;color:var(--ch-fg-dim);font-family:inherit;font-size:var(--ch-size-fine);cursor:pointer;background:0 0;padding:0 12px}.ch-switch button:hover{background:var(--ch-band);color:var(--ch-fg)}.ch-switch button[aria-selected=true]{background:var(--ch-key-wash);border-color:var(--ch-key);color:var(--ch-fg);font-weight:700}.ch-pair{gap:var(--ch-gap-md);grid-template-columns:1fr;display:grid}@media (width>=768px){.ch-pair{gap:var(--ch-gap-lg);grid-template-columns:240px minmax(0,1fr)}}.ch-pair .ch-plate-frame{margin-bottom:0}.ch-found{font-size:var(--ch-size-lede);margin-bottom:var(--ch-gap-sm)}.ch-found strong{font-weight:700}mark{color:var(--ch-fg);background:#f3e6b8;border-radius:2px;padding:0 2px}.ch-filter-row{gap:var(--ch-gap-2xs);margin-bottom:var(--ch-gap-sm);flex-wrap:wrap;display:flex}.ch-colophon{background:var(--ch-band);border-top:1px solid var(--ch-hair);padding:var(--ch-gap-xl) 0;margin-top:var(--ch-gap-2xl)}.ch-colophon-grid{gap:var(--ch-gap-md);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}@media (width>=900px){.ch-colophon-grid{gap:var(--ch-gap-lg);grid-template-columns:1.4fr 1fr 1fr 1fr}}.ch-colophon-label{font-family:var(--ch-type-text);font-size:var(--ch-size-tiny);letter-spacing:.06em;text-transform:uppercase;color:var(--ch-fg-quiet);margin:0 0 var(--ch-gap-xs);font-weight:700}.ch-colophon-grid ul{margin:0;padding:0;list-style:none}.ch-colophon-grid li{margin-bottom:6px}.ch-colophon-grid a{font-size:var(--ch-size-fine);color:var(--ch-fg-dim)}.ch-colophon-grid a:hover{color:var(--ch-fg);text-decoration:underline}.ch-colophon-about{font-size:var(--ch-size-fine);color:var(--ch-fg-dim);margin-top:var(--ch-gap-xs);line-height:1.75}.ch-colophon-note{margin-top:var(--ch-gap-lg);padding-top:var(--ch-gap-sm);border-top:1px solid var(--ch-hair);font-size:var(--ch-size-fine);color:var(--ch-fg-dim)}.ch-lost{max-width:var(--ch-column);padding:var(--ch-gap-3xl) var(--ch-margin) var(--ch-gap-2xl);text-align:center;margin:0 auto}.ch-lost-code{font-family:var(--ch-type-figure);font-size:var(--ch-size-banner);color:var(--ch-fg-quiet);font-weight:700}.ch-lost h1{margin:var(--ch-gap-2xs) 0 var(--ch-gap-xs)}.ch-lost .ch-seek{margin:var(--ch-gap-md) 0;text-align:left}.ch-lost-links{justify-content:center;gap:var(--ch-gap-2xs);flex-wrap:wrap;display:flex}.ch-guide-grid{gap:var(--ch-gap-sm);grid-template-columns:1fr;display:grid}@media (width>=768px){.ch-guide-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}.ch-guide-card{background:var(--ch-card);border:1px solid var(--ch-hair);border-left:4px solid var(--ch-key);border-radius:var(--ch-round-card);padding:var(--ch-gap-sm);color:var(--ch-fg);transition:background-color var(--ch-beat) var(--ch-curve);display:block}.ch-guide-card:hover{background:var(--ch-key-wash);color:var(--ch-fg)}.ch-guide-name{font-family:var(--ch-type-title);font-size:17px;font-weight:700;display:block}.ch-guide-note{margin-top:var(--ch-gap-3xs);font-size:var(--ch-size-fine);color:var(--ch-fg-dim);display:block}.ch-m0{margin-bottom:0}.ch-mb-xs{margin-bottom:var(--ch-gap-xs)}.ch-mb-lg{margin-bottom:var(--ch-gap-lg)}.ch-mt-sm{margin-top:var(--ch-gap-sm)}.ch-mt-xl{margin-top:var(--ch-gap-xl)}.ch-my-md{margin:var(--ch-gap-md) 0}.ch-center{text-align:center}.ch-sheet-tight{padding-top:0}.ch-seek-slot{max-width:520px;margin-top:var(--ch-gap-sm)}.ch-page-no{font-size:var(--ch-size-sub);color:var(--ch-fg-dim)}.ch-stamp{color:var(--ch-fg-dim);font-size:var(--ch-size-fine)}.ch-blank{background:var(--ch-card);border:1px solid var(--ch-hair);border-radius:var(--ch-round-card);padding:var(--ch-gap-lg);text-align:center;color:var(--ch-fg-dim)}.ch-blank h2{font-size:var(--ch-size-sub);color:var(--ch-fg);margin-bottom:var(--ch-gap-2xs)}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@media (width>=768px){.ch-masthead-links{display:flex}.ch-menu-open,.ch-find-open{display:none}.ch-find-drop{display:none!important}.ch-find{display:block}}@media (width<=767px){.ch-find{display:none}}h1,h2,h3{overflow-wrap:anywhere}.ch-prose *{max-width:100%}.ch-prose video{height:auto}