html:has(.nb-about){background:var(--nb-cover);scrollbar-color:var(--nb-evergreen) var(--nb-cover-2)}html:has(.nb-about) body{background:var(--nb-cover);scrollbar-color:var(--nb-evergreen) var(--nb-cover-2)}.nb-doc.nb-about{--nb-gutter:clamp(10px, 4vw - 8px, 48px);min-height:100vh;min-height:100dvh;padding:0 max(var(--nb-gutter), env(safe-area-inset-right)) env(safe-area-inset-bottom) max(var(--nb-gutter), env(safe-area-inset-left));background:var(--nb-cover);color:var(--nb-cover-ink);flex-direction:column;display:flex;position:relative}:is(.nb-doc :is(.nb-about-cover,.nb-about-foot,.nb-about-skip):focus-visible,.nb-doc :is(.nb-about-cover,.nb-about-foot) :focus-visible){outline-color:var(--nb-honey)}.nb-about :is(.nb-about-cover,.nb-about-foot) ::selection{background:var(--nb-honey);color:var(--nb-cover)}.nb-about-skip{left:max(var(--nb-gutter), env(safe-area-inset-left));z-index:3;border-radius:var(--nb-radius-button);background:var(--nb-honey);color:var(--nb-cover);font-family:var(--nb-sans);font-stretch:var(--nb-sans-width);font-weight:600;font-size:var(--nb-text-ui-large);transition:translate .25s var(--nb-ease-out);padding:10px 16px;text-decoration:none;position:absolute;top:8px;translate:0 -180%}:is(.nb-about-skip:focus,.nb-about-skip:focus-visible){translate:none}.nb-doc .nb-about-skip:focus-visible{outline-color:var(--nb-cover-ink)}.nb-about-cover,.nb-about-main,.nb-about-foot{width:100%;max-width:1040px;margin-left:auto;margin-right:auto}.nb-about-cover{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:6px 24px;padding:16px 0 18px;display:flex}.nb-doc .nb-about-mark{min-height:44px;font-family:var(--nb-serif);letter-spacing:-.01em;color:var(--nb-cover-ink);align-items:center;gap:10px;font-size:1.4rem;font-weight:600;line-height:1.1;text-decoration:none;display:inline-flex}.nb-about-mark-icon{fill:none;width:30px;height:30px;stroke:var(--nb-cover-ink);stroke-width:1.6px;stroke-linecap:round;stroke-linejoin:round}.nb-about-mark-trail{stroke:var(--nb-honey)}.nb-about-nav{flex-wrap:wrap;align-items:center;gap:4px 22px;display:flex}.nb-doc .nb-about-navlink{min-height:44px;font-family:var(--nb-sans);font-stretch:var(--nb-sans-width);color:var(--nb-cover-ink);text-underline-offset:6px;align-items:center;gap:7px;font-size:15px;font-weight:600;-webkit-text-decoration:underline #e1b35a8c;text-decoration:underline #e1b35a8c;text-decoration-thickness:1.5px;display:inline-flex}.nb-doc .nb-about-navlink:hover{-webkit-text-decoration-color:var(--nb-honey);text-decoration-color:var(--nb-honey)}.nb-about-navlink .nb-icon{width:17px;height:17px;color:var(--nb-cover-ink-2)}.nb-about-main{flex:1 0 auto}.nb-page.nb-about-page{--nb-pad-t:30px;--nb-pad-r:20px;--nb-pad-b:40px;--nb-pad-l:20px;border-radius:var(--nb-radius-page-spread)}@media (min-width:700px){.nb-page.nb-about-page{--nb-pad-t:48px;--nb-pad-r:56px;--nb-pad-b:60px;--nb-pad-l:56px}}.nb-doc .nb-about-title{font-size:var(--nb-text-h2);letter-spacing:-.018em;font-variation-settings:"opsz" 60;max-width:18ch;font-weight:400;line-height:1.06}.nb-about-lead{max-width:56ch}@container nb-page (width>=760px){.nb-about-head{grid-template-rows:auto auto 1fr;grid-template-columns:minmax(0,1fr) minmax(0,23rem);column-gap:48px;display:grid}.nb-about-head>.nb-about-title{grid-area:1/1}.nb-about-head>.nb-about-lead{grid-area:2/1}.nb-about-head>.nb-about-contents{grid-area:3/1;align-self:start}.nb-about-head>.nb-about-sheet{grid-area:1/2/4/3;align-self:start;margin:6px 0 0}}.nb-about-sheet{box-sizing:border-box;background:var(--nb-paper);width:100%;max-width:28rem;box-shadow:inset 0 0 0 1.5px var(--nb-honey), var(--nb-shadow-print);break-inside:avoid;border-radius:2px;margin:24px 0 0;padding:8px;container:nb-about-sheet/inline-size}.nb-about-sheet-svg{aspect-ratio:440/420;background:var(--nb-mint);width:100%;height:auto;display:block}.nb-about-sheet-pin{fill:var(--nb-evergreen-deep);stroke:var(--nb-honey);stroke-width:4px}.nb-about-sheet-name{font-family:var(--nb-serif);fill:var(--nb-evergreen-deep);paint-order:stroke;stroke:var(--nb-paper);stroke-width:6px;stroke-linejoin:round;font-weight:600}@container nb-about-sheet (width<=299.98px){.nb-about-sheet-svg .nb-about-sheet-name{stroke-width:7px;font-size:26px}}.nb-about-sheet-legend{box-sizing:border-box;width:fit-content;max-width:calc(100% - 16px);margin:var(--nb-space-3) 8px 0;border:1px solid var(--nb-honey);box-shadow:inset 0 0 0 3px var(--nb-paper), inset 0 0 0 4px var(--nb-honey);background:var(--nb-paper);color:var(--nb-evergreen-deep);font-family:var(--nb-serif);font-size:var(--nb-text-small);padding:12px 16px 10px;line-height:1.35}.nb-about-sheet-legend-title{margin:0 0 var(--nb-space-3);padding-bottom:var(--nb-space-2);border-bottom:1px solid var(--nb-honey);font-size:var(--nb-text-ui-large);letter-spacing:.16em;text-align:center;font-variant-caps:all-small-caps;font-weight:500;line-height:1.2;position:relative}.nb-about-sheet-legend-title:after{content:"";border:1px solid var(--nb-honey);background:var(--nb-paper);width:7px;height:7px;position:absolute;bottom:-4px;left:50%;transform:translate(-50%)rotate(45deg)}.nb-about-sheet-key{align-items:center;gap:10px;display:flex}.nb-about-sheet-key-pin{flex:none;width:40px;height:24px}.nb-about-sheet-caption{max-width:56ch;margin:10px 8px 4px}.nb-about-contents{margin-top:24px}.nb-about-contents ol{max-width:560px;list-style:none;display:grid}.nb-doc .nb-about-contents a{min-height:44px;color:var(--nb-ink);align-items:baseline;gap:12px;padding:8px 0 6px;font-size:1.08rem;line-height:1.35;text-decoration:none;transition:color .2s,background-color .2s;display:flex}.nb-doc .nb-about-contents a:hover{color:var(--nb-evergreen-deep);background:linear-gradient(to right, var(--nb-honey-pale), transparent 85%)}.nb-about-leader{border-bottom:2px dotted var(--nb-ink-3);flex:auto;min-width:24px;translate:0 -4px}.nb-about-contents .nb-icon{width:16px;height:16px;color:var(--nb-brick);align-self:baseline}.nb-about-section{border-bottom:1px solid var(--nb-rule);gap:12px;padding:30px 0 32px;scroll-margin-top:16px;display:grid}.nb-about-section>p{max-width:var(--nb-measure)}.nb-about-section>h2{margin-bottom:4px}.nb-about-section strong{font-weight:600}.nb-about-section a{color:var(--nb-evergreen-deep);font-weight:600}.nb-about-section .nb-help-answers{max-width:760px}.nb-about-example{max-width:760px;margin-top:4px}.nb-about-example>summary{gap:8px}.nb-about-example[open]>summary{margin-bottom:4px}.nb-about-end{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px 24px;padding-top:28px;display:flex}.nb-about-foot{font-family:var(--nb-sans);font-stretch:var(--nb-sans-width);color:var(--nb-cover-ink-2);padding:22px 0 28px;font-size:14px}@media (max-width:599.98px){.nb-about-cover{padding:10px 0 12px}.nb-doc .nb-about-mark{font-size:1.22rem}.nb-about-end>.nb-btn{width:100%}}@media print{.nb-doc.nb-about{color:#000;background:#fff;padding:0}html:has(.nb-about){color:#000;background:#fff;padding:0}html:has(.nb-about) body{color:#000;background:#fff;padding:0}.nb-about :is(.nb-about-skip,.nb-about-nav,.nb-about-contents,.nb-about-end .nb-btn){display:none}.nb-about-mark-icon{stroke:#000}.nb-doc .nb-about-mark,.nb-about-foot{color:#000}.nb-page.nb-about-page{box-shadow:none;padding:0}.nb-about-sheet{box-shadow:inset 0 0 0 1.5px var(--nb-honey);-webkit-print-color-adjust:exact;print-color-adjust:exact}}@media (forced-colors:active){.nb-about-sheet{outline-offset:-1px;outline:1px solid canvastext}.nb-about-sheet-pin{fill:canvas;stroke:canvastext}.nb-about-sheet-name{fill:canvastext;stroke:canvas}.nb-about-sheet-legend{border-color:canvastext}.nb-about-sheet-legend-title{border-bottom-color:canvastext}.nb-about-sheet-legend-title:after{background:canvas;border-color:canvastext}}.nb-insert{border-radius:var(--nb-radius-page);background:var(--nb-print);width:100%;color:var(--nb-ink);box-shadow:var(--nb-shadow-card);animation:nb-insert-in .45s var(--nb-ease-out) both;margin:0 auto 16px;padding:26px 30px 24px;position:relative}@keyframes nb-insert-in{0%{opacity:0;translate:0 -8px}}.nb-insert-head{border-bottom:3px double var(--nb-rule-strong);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 20px;padding-bottom:14px;display:flex}.nb-insert-title,.nb-tour-title{font-family:var(--nb-serif);font-size:var(--nb-text-h3);letter-spacing:-.01em;font-variation-settings:"opsz" 30;color:var(--nb-ink);scroll-margin-top:16px;font-weight:400;line-height:1.2}.nb-insert-head-actions{flex-wrap:wrap;align-items:center;gap:6px 18px;display:flex}.nb-help-panel{max-width:1120px}.nb-help-body{gap:18px;margin-top:18px;display:grid}.nb-help-side{align-content:start;gap:14px;display:grid}.nb-help-intro{color:var(--nb-ink-2);max-width:44ch;font-size:17px;line-height:1.55}.nb-help-shared{color:var(--nb-ink);border-radius:var(--nb-radius-button);background:var(--nb-honey-pale);max-width:44ch;padding:10px 14px;font-size:16px;line-height:1.5}.nb-help-actions{flex-wrap:wrap;gap:10px 12px;display:flex}.nb-help-foot{font-family:var(--nb-sans);font-stretch:var(--nb-sans-width);color:var(--nb-ink-2);font-size:14.5px;line-height:1.5}.nb-help-sep{padding:0 .2em}.nb-help-foot a,.nb-help-answer-body a{color:var(--nb-evergreen-deep);font-weight:600}.nb-help-example{gap:8px;margin-top:10px;display:grid}.nb-help-example .nb-link{justify-self:start}@container nb-book (width>=900px){.nb-help-body{grid-template-columns:minmax(240px,300px) minmax(0,1fr);column-gap:48px}.nb-help-side{position:sticky;top:16px}.nb-help-side .nb-help-actions{flex-direction:column;align-items:stretch}.nb-insert.nb-help-panel{padding:30px 40px 32px}}.nb-help-answers{border-top:1px solid var(--nb-rule)}.nb-help-answers .nb-help-answer{border-bottom:1px solid var(--nb-rule)}.nb-help-answers .nb-help-answer>summary{width:100%;min-height:52px;font-family:var(--nb-serif);color:var(--nb-ink);justify-content:space-between;align-items:center;gap:16px;padding:12px 2px;font-size:1.1rem;font-weight:500;line-height:1.35;transition:color .2s;display:flex}.nb-help-answers .nb-help-answer>summary:hover{color:var(--nb-evergreen-deep)}.nb-help-answers .nb-help-answer>summary .nb-icon{color:var(--nb-brick)}.nb-help-question{text-wrap:pretty}.nb-help-answer-body{max-width:64ch;color:var(--nb-ink);gap:10px;padding:0 2px 18px;font-size:17px;line-height:1.6;display:grid}.nb-completed-example{gap:10px;max-width:68ch;margin-top:8px;display:grid}.nb-example-caption{margin-top:-4px}.nb-example-intro{color:var(--nb-ink-2)}.nb-example-steps{counter-reset:nb-example;border-top:1px solid var(--nb-rule);margin-top:6px;list-style:none;display:grid}.nb-example-steps>li{counter-increment:nb-example;border-bottom:1px solid var(--nb-rule);gap:8px;padding:16px 0 18px 44px;display:grid;position:relative}.nb-example-steps>li:before{content:counter(nb-example);font-family:var(--nb-serif);color:var(--nb-brick);font-variant-numeric:lining-nums;font-size:1.6rem;font-style:italic;line-height:1;position:absolute;top:12px;left:4px}.nb-example-steps strong{font-family:var(--nb-sans);font-stretch:var(--nb-sans-width);letter-spacing:.01em;color:var(--nb-ink);font-size:.86em;font-weight:600}.nb-tour{max-width:780px}.nb-tour-text{max-width:62ch;margin-top:10px;font-size:17.5px;line-height:1.55}.nb-tour-caption{max-width:62ch;margin-top:10px}.nb-tour-foot{border-top:1px solid var(--nb-rule);flex-wrap:wrap;align-items:center;gap:10px 14px;margin-top:18px;padding-top:14px;display:flex}.nb-tour-count{font-family:var(--nb-sans);font-stretch:var(--nb-sans-width);letter-spacing:.02em;color:var(--nb-ink-2);font-variant-numeric:tabular-nums lining-nums;flex:auto;justify-items:center;gap:6px;font-size:13.5px;font-weight:600;line-height:1.3;display:grid}.nb-tour-marks{gap:4px;display:inline-flex}.nb-tour-marks>span{background:var(--nb-rule-strong);border-radius:2px;width:14px;height:3px}.nb-tour-marks>span.is-done{background:var(--nb-brick)}.nb-tour-close{margin-left:4px}@media (max-width:599.98px){.nb-insert{margin-bottom:12px;padding:20px 18px 18px}.nb-insert-title,.nb-tour-title{font-size:1.36rem}.nb-help-actions>.nb-btn{width:100%}.nb-tour-text{font-size:16.5px}.nb-tour-foot{grid-template-columns:auto minmax(0,1fr) auto;grid-template-areas:"back count next""close close close";display:grid}.nb-tour-back{grid-area:back}.nb-tour-count{grid-area:count}.nb-tour-next{grid-area:next}.nb-tour-close{grid-area:close;justify-self:start;margin-left:0}}.nb-tour-frame .nb-tour{animation:none}.nb-tour-frame .nb-tour-title{padding-left:28px;position:relative}.nb-tour-frame .nb-tour-title:before{content:"";box-sizing:border-box;border:3px solid var(--nb-honey);background:var(--nb-evergreen-deep);border-radius:50%;width:16px;height:16px;position:absolute;top:calc(.6em - 8px);left:0}.nb-tour-frame[data-opening=playing] .nb-tour-title:before{animation:opening-pin-pop var(--opening-pop-time) var(--opening-pop-ease) both, opening-pin-fade var(--opening-pop-time) ease-out both}.nb-tour-pointer{pointer-events:none;z-index:3;position:absolute;top:0;left:0;overflow:visible}.nb-tour-pointer :is(.nb-tour-pointer-casing,.nb-tour-pointer-line){fill:none;stroke-linecap:round}.nb-tour-pointer-casing{stroke:var(--nb-evergreen-deep);stroke-width:7px}.nb-tour-pointer-line{stroke:var(--nb-honey);stroke-width:4px}.nb-tour-pointer[data-opening=playing] .nb-tour-pointer-lead{stroke-dasharray:1 2;animation:opening-route-draw var(--opening-pop-time) var(--opening-draw-ease) both;animation-delay:var(--opening-name-lag)}.nb-tour-pointer[data-opening=playing] .nb-tour-pointer-ring{transform-box:fill-box;transform-origin:50%;animation:opening-pin-pop var(--opening-pop-time) var(--opening-pop-ease) both, opening-pin-fade var(--opening-pop-time) ease-out both;animation-delay:calc(var(--opening-name-lag) + var(--opening-pop-time))}@media (prefers-reduced-motion:reduce){.nb-tour-frame[data-opening] .nb-tour-title:before,.nb-tour-pointer[data-opening] :is(.nb-tour-pointer-lead,.nb-tour-pointer-ring){animation:none}.nb-tour-pointer[data-opening] .nb-tour-pointer-lead{stroke-dasharray:none}}@media print{.nb-tour-pointer{display:none}}@media (forced-colors:active){.nb-tour-frame .nb-tour-title:before{background:canvas;border-color:canvastext}.nb-tour-pointer-casing{stroke:canvastext}.nb-tour-pointer-line{stroke:highlight}}
