:root{--background: #ffffff;--foreground: #000000;--muted: #444444;--serif: "Source Serif 4", Georgia, "Times New Roman", serif;--display-font: "Literata", Georgia, serif;--display-weight: 600;--display-tracking: -.03em;--body-size: 17.25px;--body-leading: 1.62;--heading-weight: 600;--heading-tracking: -.01em;color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--foreground);background:var(--background);font-family:var(--serif);font-size:var(--body-size);font-weight:400;line-height:var(--body-leading);font-optical-sizing:auto;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;font-kerning:normal;overflow-x:clip}a{color:inherit;text-decoration-thickness:1px;text-underline-offset:.12em}a:hover{text-decoration-thickness:2px}a:focus-visible{outline:2px solid var(--foreground);outline-offset:3px}.skip-link{position:fixed;z-index:10;top:.75rem;left:.75rem;padding:.4rem .65rem;color:var(--background);background:var(--foreground);transform:translateY(-200%)}.skip-link:focus{transform:translateY(0)}.page-shell{width:calc(100% - 3rem);max-width:32rem;margin:0 auto;padding:2.75rem 0 6.25rem}.site-header{margin-bottom:2.8rem}.site-header h1{margin:0;font-size:1.58rem;font-weight:var(--heading-weight);line-height:1.1;letter-spacing:var(--heading-tracking)}.site-header h1 a{text-decoration:none}.wordmark{display:inline-flex;align-items:center;font-family:var(--display-font);font-weight:var(--display-weight);letter-spacing:var(--display-tracking);font-optical-sizing:auto}p{margin:0;text-wrap:pretty}p+p{margin-top:1.35rem}main section{margin-top:2.35rem;scroll-margin-top:2rem}main section:first-child{margin-top:0}h2{margin:0 0 .85rem;font-size:1.17rem;font-weight:var(--heading-weight);line-height:1.3;letter-spacing:var(--heading-tracking)}.editorial-list{margin:0;padding-left:1.05rem}.editorial-list li{padding-left:.08rem;overflow-wrap:anywhere}.editorial-list li+li{margin-top:.95rem}.editorial-list span{color:var(--foreground)}.editorial-list .work-versions{white-space:nowrap}.editorial-list .work-contribution{color:#66625d;font-size:.9em}.books-section{margin-bottom:0}.books-copy{position:relative;z-index:1}.bookshelf{position:relative;width:100%;margin:2.7rem 0 0;padding-top:6.2rem;overflow:visible;color:var(--foreground);background:var(--background)}.bookshelf-info{position:absolute;top:0;right:0;left:0;display:flex;height:5.15rem;align-items:flex-end}.bookshelf-count{display:flex;width:100%;align-items:baseline;justify-content:space-between;color:#343434;font-size:.9rem;line-height:1.3}.bookshelf-count strong{margin-right:.18em;font-family:var(--display-font);font-size:1.35rem;font-weight:600}.bookshelf-count span{margin-left:auto;color:#7a7a7a;font-size:.74rem}.bookshelf-details{width:100%;animation:bookshelf-detail-in .28s ease both}.bookshelf-details h3{margin:0 0 .25rem;font-family:var(--display-font);font-size:clamp(1.45rem,4.6vw,2rem);font-weight:600;line-height:1.1;letter-spacing:-.035em}.bookshelf-details p{color:#5d5d5d;font-size:.77rem;line-height:1.35}.bookshelf-details a{color:inherit;text-decoration-thickness:1px}.bookshelf-rail{position:relative;overflow-x:auto;overflow-y:hidden;scrollbar-color:#bdbdb8 transparent;scrollbar-width:thin}.bookshelf-row{display:flex;width:max-content;min-width:100%;height:17.35rem;margin:0;padding:1.1rem 0 0;align-items:flex-end;justify-content:center;gap:.34rem;list-style:none}.shelf-book{--spine-width: 3.15rem;--spine-height: 14.2rem;--spine-paper: #d1c57d;--spine-ink: #12175f;--spine-top: #ebe3ae;position:relative;flex:0 0 var(--spine-width)}.book-spine{position:relative;display:flex;width:var(--spine-width);height:var(--spine-height);margin:0;padding:.65rem .54rem;align-items:center;justify-content:space-between;border:0;border-radius:1px 2px 1px 1px;color:var(--spine-ink);background:var(--spine-paper);box-shadow:inset 1px 0 #ffffff47,inset -1px 0 #0000001f,.28rem .45rem .75rem #00000017;font:inherit;cursor:grab;outline-offset:4px;transform:translateY(0) rotate(0);transform-origin:bottom center;transition:transform .34s cubic-bezier(.2,.72,.2,1),box-shadow .34s ease,filter .24s ease}.book-spine:before{position:absolute;right:0;bottom:100%;left:.18rem;height:.28rem;border-radius:1px 1px 0 0;background:var(--spine-top);box-shadow:inset 0 1px #ffffff80;content:"";transform:skew(-34deg);transform-origin:bottom}.book-spine:after{position:absolute;inset:0;z-index:0;pointer-events:none;background:var(--spine-pattern, none);opacity:.46;content:""}.book-spine:hover,.book-spine:focus-visible,.book-spine.is-active{z-index:3;filter:saturate(1.06) brightness(1.02);box-shadow:inset 1px 0 #ffffff57,inset -1px 0 #0000001a,.55rem .8rem 1.3rem #00000024;transform:translateY(-.9rem) rotate(-1.2deg)}.book-spine:focus-visible{outline:2px solid var(--foreground)}.book-spine-title,.book-spine-number{position:relative;z-index:1;writing-mode:vertical-rl;transform:rotate(180deg)}.book-spine-title{max-height:calc(var(--spine-height) - 2.9rem);overflow:hidden;font-family:var(--display-font);font-size:.74rem;font-weight:600;letter-spacing:-.015em;line-height:1.05;text-align:left;text-overflow:ellipsis;white-space:nowrap}.book-spine-number{font-size:.54rem;letter-spacing:.12em;opacity:.72}.spine-pca{--spine-width: 3.45rem;--spine-height: 15rem;--spine-paper: #ccbb69;--spine-ink: #111568;--spine-top: #e8db98;--spine-pattern: repeating-linear-gradient(90deg, transparent 0 .3rem, rgba(17, 21, 104, .1) .3rem .36rem)}.spine-maintenance{--spine-width: 3rem;--spine-height: 13.65rem;--spine-paper: #cbc5a7;--spine-ink: #133451;--spine-top: #e7e2c8;--spine-pattern: linear-gradient(152deg, transparent 0 54%, rgba(195, 149, 49, .3) 54% 55%, transparent 55%)}.spine-efficiency{--spine-width: 3.7rem;--spine-height: 15.65rem;--spine-paper: #243443;--spine-ink: #f0f1ed;--spine-top: #53606a;--spine-pattern: radial-gradient(circle at 58% 72%, transparent 0 1.15rem, rgba(255, 255, 255, .11) 1.15rem 1.22rem, transparent 1.22rem)}.spine-era{--spine-width: 2.75rem;--spine-height: 14.4rem;--spine-paper: #777774;--spine-ink: #f4f3ee;--spine-top: #a5a39f;--spine-pattern: repeating-linear-gradient(0deg, transparent 0 1.15rem, rgba(255, 255, 255, .07) 1.15rem 1.2rem)}.spine-boom{--spine-width: 3.3rem;--spine-height: 13rem;--spine-paper: #8d2646;--spine-ink: #f6d3dc;--spine-top: #b64b6c;--spine-pattern: radial-gradient(circle, rgba(255, 221, 229, .32) 0 1px, transparent 1.5px)}.spine-people{--spine-width: 3.55rem;--spine-height: 14.85rem;--spine-paper: #b78e67;--spine-ink: #1b1b1b;--spine-top: #d4b18e;--spine-pattern: linear-gradient(135deg, transparent 0 61%, rgba(58, 34, 21, .15) 61% 73%, transparent 73%)}.bookshelf-edge{position:relative;z-index:5;width:100%;height:.38rem;margin-top:-.08rem;border-top:2px solid #151515;background:linear-gradient(#e7e6e1,#f7f7f4);box-shadow:0 .6rem 1rem #0000000f}@keyframes bookshelf-detail-in{0%{opacity:0;transform:translateY(.3rem)}to{opacity:1;transform:translateY(0)}}@media(max-width:36rem){body{font-size:var(--body-size);line-height:var(--body-leading)}.page-shell{width:calc(100% - 2.5rem);padding:1.85rem 0 4.75rem}.site-header{margin-bottom:2.35rem}.site-header h1{font-size:1.5rem}p+p{margin-top:1.25rem}main section{margin-top:2.15rem}.editorial-list{padding-left:1.1rem}.editorial-list li+li{margin-top:.85rem}.books-section{margin-bottom:0}.bookshelf{margin-top:2.35rem;padding-top:6.3rem}.bookshelf-info{height:5.25rem}.bookshelf-count span{max-width:10.5rem;text-align:right}.bookshelf-details h3{font-size:clamp(1.4rem,6.4vw,1.8rem)}.bookshelf-rail{margin-right:-.15rem;scroll-padding-inline:.15rem;scroll-snap-type:x proximity}.bookshelf-row{height:16.5rem;padding-right:.8rem;justify-content:flex-start}.shelf-book{scroll-snap-align:start}.book-spine-title{font-size:.7rem}}@media(max-width:25rem){body{font-size:calc(var(--body-size) - .5px)}.page-shell{width:calc(100% - 2rem)}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.bookshelf-details,.book-spine{animation:none;transition:none}}.bookshelf{position:relative;left:50%;width:min(40rem,calc(100vw - 2rem));margin:.55rem 0 0;padding-top:0;overflow:visible;color:var(--foreground);background:var(--background);transform:translate(-50%)}.bookshelf-stack{position:relative;display:grid;gap:.9rem;padding:.12rem 0 1rem;border:0;background:transparent;box-shadow:none}.bookshelf-stack:before,.bookshelf-stack:after{display:none}.bookshelf-stack:before{left:-.28rem}.bookshelf-stack:after{right:-.28rem;transform:scaleX(-1)}.bookshelf-floor{position:relative;z-index:1;isolation:isolate}.bookshelf-floor:before{display:none}.bookshelf-floor:first-child:after{display:none}.bookshelf-row{position:relative;display:block;width:100%;min-width:0;height:auto;min-height:11.9rem;margin:0;padding:.72rem .1rem .02rem;overflow:visible}.bookshelf-volumes{--books-on-shelf: 12;position:relative;z-index:2;display:flex;min-width:0;width:100%;height:11.5rem;margin:0;padding:0;align-items:flex-end;justify-content:center;gap:.24rem;list-style:none;perspective:54rem}.shelf-book{--spine-desktop-width: 2.121rem;--spine-mobile-offset: 0rem;--spine-width: var(--spine-desktop-width);--spine-height: 9.65rem;--spine-paper: #7e302d;--spine-ink: #f8edda;--spine-accent: #d6b45f;--spine-top: #e9e1ce;position:relative;flex:0 0 var(--spine-width);scroll-snap-align:none;transform-style:preserve-3d;will-change:transform}.shelf-book:has(.book-spine.is-selected),.shelf-book:has(.book-spine.is-pulling){z-index:20}.shelf-book:has(.book-spine.is-selected):before,.shelf-book:has(.book-spine.is-pulling):before{position:absolute;z-index:0;right:.12rem;bottom:-.14rem;left:.12rem;height:.28rem;pointer-events:none;border-radius:50%;background:radial-gradient(ellipse at center,rgba(28,24,19,.3),rgba(28,24,19,.08) 50%,transparent 76%);content:"";filter:blur(.8px);opacity:.68;transform:translateZ(-1px) scaleX(.94);animation:bookshelf-slot-open .62s cubic-bezier(.2,.78,.2,1) both}.shelf-book:nth-child(2) .book-spine{transform:translateZ(0) rotateY(-.45deg) rotate(.3deg)}.shelf-book:nth-child(4) .book-spine{transform:translateZ(0) rotateY(-.6deg) rotate(-.45deg)}.shelf-book:nth-child(6) .book-spine{transform:translateZ(0) rotateY(-.4deg) rotate(.24deg)}.bookshelf-volumes:has(.book-spine:hover) .book-spine:not(:hover){filter:saturate(.72) brightness(1.005);transform:translateZ(0) scale(.994);transition-duration:.42s}.book-spine{--spine-image: none;--selected-transform: translate3d(0, -.92rem, 0) rotateX(-1deg) scale(1.03);position:relative;display:block;width:var(--spine-width);height:var(--spine-height);margin:0;padding:0;border:1px solid rgba(26,22,17,.13);border-radius:.17rem .14rem .08rem .11rem;color:var(--spine-ink);background:linear-gradient(180deg,rgba(255,255,255,.045),transparent 16%,transparent 88%,rgba(0,0,0,.035)),linear-gradient(90deg,rgba(0,0,0,.085) 0,rgba(255,255,255,.04) .1rem,transparent .38rem,transparent calc(100% - .3rem),rgba(0,0,0,.065) calc(100% - .06rem),rgba(255,255,255,.025) 100%),var(--spine-image) center / cover no-repeat,var(--spine-paper);box-shadow:inset .06rem 0 .1rem #ffffff12,inset -.06rem 0 .1rem #0000000f,inset 0 0 0 1px #ffffff06,.05rem .08rem .12rem #00000016,.14rem .2rem .36rem #00000009;filter:saturate(.88) contrast(.98) brightness(1.01);font:inherit;cursor:grab;touch-action:none;transform:translateZ(0);transform-style:preserve-3d;transform-origin:bottom center;user-select:none;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;transition:transform .36s cubic-bezier(.18,.76,.18,1),box-shadow .36s ease,filter .24s ease;will-change:transform}.book-spine:before{position:absolute;z-index:3;top:-.13rem;right:-.03rem;bottom:auto;left:.07rem;height:.15rem;border:1px solid rgba(74,67,56,.12);border-bottom:0;border-radius:.08rem .07rem .02rem .02rem;background:linear-gradient(180deg,color-mix(in srgb,var(--spine-paper) 58%,#f7f4ec) 0 1px,#f7f4ed 1px 56%,#d8d2c7 57% 66%,#ebe7de 67% 100%);box-shadow:inset 0 1px #ffffffa6,0 1px 1px #00000014;content:"";clip-path:polygon(4% 0,94% 0,100% 100%,0 100%);transform:skew(-7deg) translateZ(-1px);transform-origin:bottom left}.book-spine:after{position:absolute;z-index:-1;top:.1rem;right:-.06rem;bottom:.04rem;left:auto;width:.07rem;pointer-events:none;border:1px solid rgba(45,40,34,.12);border-left:0;border-radius:0 .06rem .04rem 0;background:linear-gradient(90deg,#ffffff09,#0000002e),var(--spine-image) center / cover no-repeat,var(--spine-paper);background-blend-mode:normal,multiply,normal;box-shadow:inset -1px 0 #0000001c,.05rem .08rem .12rem #00000014;content:"";clip-path:polygon(0 1%,100% 0,100% 96%,0 100%);transform:skewY(-4deg) translateZ(-2px);transform-origin:left center}.book-spine-surface{position:absolute;z-index:1;inset:0;overflow:hidden;pointer-events:none;border-radius:inherit;background:linear-gradient(90deg,rgba(255,255,255,.018),transparent 24% 78%,rgba(0,0,0,.022));box-shadow:inset 0 1px #ffffff0e,inset 0 -1px #0000000b}.book-spine-surface:before,.book-spine-surface:after{position:absolute;right:.46rem;left:.46rem;height:1px;background:color-mix(in srgb,var(--spine-accent) 42%,transparent);box-shadow:0 1px #ffffff0e;content:"";display:none}.book-spine-surface:before{top:.62rem}.book-spine-surface:after{bottom:.56rem}.book-spine:hover,.book-spine:focus-visible,.book-spine.is-active,.shelf-book:nth-child(2) .book-spine:hover,.shelf-book:nth-child(2) .book-spine:focus-visible,.shelf-book:nth-child(2) .book-spine.is-active,.shelf-book:nth-child(4) .book-spine:hover,.shelf-book:nth-child(4) .book-spine:focus-visible,.shelf-book:nth-child(4) .book-spine.is-active,.shelf-book:nth-child(6) .book-spine:hover,.shelf-book:nth-child(6) .book-spine:focus-visible,.shelf-book:nth-child(6) .book-spine.is-active{z-index:12;filter:saturate(.82) brightness(1.012) contrast(.99);box-shadow:inset .1rem .01rem .16rem #ffffff1a,inset -.1rem 0 .15rem #00000014,.24rem .34rem .52rem #00000024,.58rem .72rem 1.1rem #0000000f;transform:translate3d(0,-.78rem,0) rotateX(-.55deg) scale(1.018)}.book-spine:focus-visible{outline:1.5px solid color-mix(in srgb,var(--spine-ink) 72%,#ffffff);outline-offset:3px}.book-spine:focus-visible .book-spine-surface:after{height:2px;background:color-mix(in srgb,var(--spine-accent) 78%,var(--spine-ink));box-shadow:0 1px #ffffff2e;opacity:1}.bookshelf-floor .shelf-book .book-spine.is-selected{z-index:16;filter:saturate(.88) brightness(1.025) contrast(.995);box-shadow:inset .12rem .01rem .18rem #ffffff1f,inset -.11rem 0 .16rem #00000016,0 .3rem .5rem #0000001f,0 .72rem 1.2rem #00000024;transform:var(--selected-transform);animation:bookshelf-book-selected .36s linear both}.book-spine.is-selected:after{display:none}.bookshelf-floor .shelf-book .book-spine.is-returning{z-index:14;animation:bookshelf-book-return .32s cubic-bezier(.4,0,.2,1) both}.book-spine.is-returning:after{display:none}.bookshelf-floor .shelf-book .book-spine.is-pulling,.bookshelf-floor .shelf-book .book-spine.is-pulling:hover,.bookshelf-floor .shelf-book .book-spine.is-pulling:focus-visible{z-index:24;filter:saturate(.9) brightness(1.03) contrast(1);cursor:grabbing;transform:translate3d(var(--pull-x, 0),var(--pull-y, -.8rem),0) rotateX(var(--pull-rotate-x, -1.2deg)) rotate(var(--pull-tilt, 0deg)) scale(var(--pull-scale, 1.02));transform-origin:bottom center;box-shadow:inset .12rem .01rem .18rem #ffffff21,inset -.11rem 0 .16rem #00000014,0 .34rem .66rem #0000001f,0 .86rem 1.45rem #00000026;animation:none!important;transition:none}.bookshelf-floor .shelf-book .book-spine.is-pulling:before{top:-.19rem;height:.21rem}.bookshelf-floor .shelf-book .book-spine.is-pulling:after{display:none}body.is-pulling-book,body.is-pulling-book *{cursor:grabbing!important;-webkit-user-select:none!important;user-select:none!important}.bookshelf-volumes:has(.book-spine.is-selected) .book-spine:not(.is-selected):not(:hover):not(:focus-visible){filter:saturate(.58) brightness(1.018);transform:translateZ(0) scale(.99)}.book-spine-title{position:absolute;z-index:2;inset:.62rem .3rem;display:flex;width:auto;height:auto;max-width:none;max-height:none;align-items:center;justify-content:center;overflow:hidden;color:currentColor;font-family:Literata,"Source Serif 4",Georgia,serif;font-size:.65rem;font-weight:400;letter-spacing:.012em;line-height:1.1;text-align:center;text-shadow:none;writing-mode:horizontal-tb;transform:none}.book-spine-title-text{display:block;width:max-content;max-width:calc(var(--spine-height) - 1.18rem);max-height:calc(var(--spine-width) - .34rem);text-overflow:clip;white-space:nowrap;writing-mode:horizontal-tb;transform:rotate(90deg);transform-origin:center}.book-spine.is-chinese .book-spine-title{font-family:"Noto Serif SC",Songti SC,STSong,serif;font-weight:400;letter-spacing:.06em;line-height:1.16}.book-spine.is-chinese .book-spine-title-text{display:flex;width:auto;max-width:100%;max-height:100%;flex-direction:row-reverse;align-items:center;justify-content:center;gap:.08em;writing-mode:horizontal-tb;transform:none}.book-spine-title-column{display:flex;flex-direction:column;align-items:center;justify-content:center;white-space:nowrap}.book-spine.is-title-xl .book-spine-title{font-size:.76rem}.book-spine.is-title-lg .book-spine-title{font-size:.68rem}.book-spine.is-title-md .book-spine-title{font-size:.61rem}.book-spine.is-title-sm .book-spine-title{font-size:.49rem}.book-spine.is-title-xs .book-spine-title{font-size:.39rem}.bookshelf-info{position:relative;z-index:40;top:auto;display:flex;width:min(32rem,100%);height:4rem;min-width:0;min-height:4rem;margin:0 auto .18rem;padding:0;align-items:center;border-top:1px solid transparent;border-bottom:1px solid transparent;box-sizing:border-box;background:transparent;box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none}.bookshelf-info.has-details{border-color:transparent}.bookshelf-range{display:none}.bookshelf-range span{display:block;margin-bottom:.18rem;font-family:var(--serif);font-size:.53rem;letter-spacing:.09em;text-transform:uppercase}.bookshelf-details{display:grid;width:100%;max-width:100%;margin:0 auto;padding:.48rem .72rem .52rem;grid-template-columns:1.5rem minmax(0,1fr) auto;grid-template-areas:"number title link" "number author link";column-gap:.62rem;align-items:center;border:1px solid #dfdcd4;border-radius:.34rem;background:#fffffffb;box-shadow:0 .42rem 1.1rem #16130f13;animation:bookshelf-compact-detail-in .36s .15s cubic-bezier(.2,.72,.2,1) both}.bookshelf-detail-number{grid-area:number;margin:0;color:#989791;font-size:.51rem;line-height:1;letter-spacing:.14em}.bookshelf-details h3{grid-area:title;margin:0 0 .12rem;font-family:"Source Serif 4",Songti SC,STSong,Georgia,serif;font-size:.9rem;font-weight:550;line-height:1.2;letter-spacing:-.012em;overflow-wrap:anywhere}.bookshelf-details p:not(.bookshelf-detail-number){grid-area:author;margin:0;color:#62615d;font-size:.59rem;line-height:1.3}.bookshelf-details a{grid-area:link;color:inherit;font-size:.59rem;line-height:1.2;white-space:nowrap;text-decoration-thickness:1px;text-underline-offset:.15em}.bookshelf-edge{position:relative;z-index:8;width:min(100%,33rem);height:.08rem;margin:-.02rem auto 0;border:0;background:linear-gradient(90deg,transparent,#8f8980 8% 92%,transparent);box-shadow:0 .62rem 1.1rem #0000001a}.bookshelf-edge:before{position:absolute;right:.75rem;bottom:100%;left:.75rem;height:.08rem;border:0;background:linear-gradient(90deg,transparent,rgba(75,69,61,.24) 8% 92%,transparent);content:"";transform:none}.bookshelf-edge span{display:none}.spine-fabric{--spine-height: 10.29rem;--spine-paper: #35423e;--spine-ink: #f0ece3;--spine-accent: #82968c;--spine-top: #acb9b1}.spine-infinity{--spine-height: 10.44rem;--spine-paper: #e4e0d7;--spine-ink: #343431;--spine-accent: #999288;--spine-top: #f2eee7}.spine-charlie{--spine-height: 10.54rem;--spine-paper: #b7aa78;--spine-ink: #37342b;--spine-accent: #7f7659;--spine-top: #d8cfab}.spine-dadao{--spine-height: 10.04rem;--spine-paper: #e7e5de;--spine-ink: #52676b;--spine-accent: #a0acad;--spine-top: #f3f1ec}.spine-civilization{--spine-height: 10.4rem;--spine-paper: #d7d2c8;--spine-ink: #4c4943;--spine-accent: #9d907e;--spine-top: #eeeae3}.spine-unique{--spine-height: 9.91rem;--spine-paper: #87927f;--spine-ink: #2f3732;--spine-accent: #5f6e62;--spine-top: #bcc5b7}.spine-hard-thing{--spine-height: 10.46rem;--spine-paper: #3e4743;--spine-ink: #f0ece4;--spine-accent: #8c928c;--spine-top: #b8bbb4}.spine-problem{--spine-height: 10.25rem;--spine-paper: #7e8f8d;--spine-ink: #293332;--spine-accent: #566b68;--spine-top: #b7c3c0}.spine-newgames{--spine-height: 10.54rem;--spine-paper: #e0dbd2;--spine-ink: #3d3a35;--spine-accent: #988b7e;--spine-top: #f0ece5}.spine-zero{--spine-height: 10.01rem;--spine-paper: #6f8389;--spine-ink: #f2eee6;--spine-accent: #4e626a;--spine-top: #aebbc0}.spine-paranoid{--spine-height: 10.37rem;--spine-paper: #4a4642;--spine-ink: #f2ede6;--spine-accent: #8d8379;--spine-top: #a8a098}.spine-output{--spine-height: 10.23rem;--spine-paper: #68778a;--spine-ink: #f2eee6;--spine-accent: #9ba4b2;--spine-top: #aeb6c1}.spine-great{--spine-height: 10.41rem;--spine-paper: #92766b;--spine-ink: #f4eee5;--spine-accent: #c3a095;--spine-top: #c6a69d}.spine-when{--spine-height: 10.12rem;--spine-paper: #b5aa7b;--spine-ink: #343129;--spine-accent: #7b7354;--spine-top: #d8d0aa}.spine-power-law{--spine-height: 10.53rem;--spine-paper: #87907a;--spine-ink: #30352e;--spine-accent: #5f6958;--spine-top: #bdc4b4}.spine-never-split{--spine-height: 10.4rem;--spine-paper: #8d766b;--spine-ink: #f4eee6;--spine-accent: #b8a096;--spine-top: #bbaaa2}.spine-how-to-read{--spine-height: 10.17rem;--spine-paper: #7e938a;--spine-ink: #f3efe7;--spine-accent: #536b63;--spine-top: #b6c2bd}.spine-journey-west{--spine-height: 10.44rem;--spine-paper: #758995;--spine-ink: #f3efe7;--spine-accent: #506872;--spine-top: #afbec5}.spine-conquest-happiness{--spine-height: 10.29rem;--spine-paper: #80787b;--spine-ink: #f3ede6;--spine-accent: #ae9da6;--spine-top: #b9adb4}.spine-naval{--spine-height: 10.49rem;--spine-paper: #e5e1d9;--spine-ink: #383633;--spine-accent: #99948b;--spine-top: #f1eee8}.spine-elements-style{--spine-height: 10.08rem;--spine-paper: #788276;--spine-ink: #f2eee6;--spine-accent: #545b50;--spine-top: #b4b9ad}.spine-lean-startup{--spine-height: 10.34rem;--spine-paper: #657d89;--spine-ink: #f3eee6;--spine-accent: #a9b7bd;--spine-top: #a4b5be}.spine-steve-jobs{--spine-height: 10.44rem;--spine-paper: #dcd8d1;--spine-ink: #343536;--spine-accent: #92918d;--spine-top: #eeeae4}.spine-elon-musk{--spine-height: 10.53rem;--spine-paper: #31383a;--spine-ink: #f1efea;--spine-accent: #7b8388;--spine-top: #9aa0a4}.spine-flow{--spine-height: 10.22rem;--spine-paper: #5b7472;--spine-ink: #f2eee5;--spine-accent: #8fa6a0;--spine-top: #aabbb6}@keyframes bookshelf-compact-detail-in{0%{opacity:0;transform:translateY(.2rem)}to{opacity:1;transform:translateY(0)}}@keyframes bookshelf-slot-open{0%{opacity:0;transform:translateZ(-1px) scaleX(.36)}to{opacity:.82;transform:translateZ(-1px) scaleX(.94)}}@keyframes bookshelf-book-selected{0%{filter:saturate(.68) brightness(1.005);transform:translate3d(0,-.04rem,0) rotateX(0) scale(.992)}to{filter:saturate(.88) brightness(1.025);transform:var(--selected-transform)}}@keyframes bookshelf-book-return{0%{filter:saturate(.88) brightness(1.025) contrast(.995);box-shadow:inset .12rem .01rem .18rem #ffffff1f,inset -.11rem 0 .16rem #00000016,0 .3rem .5rem #0000001f,0 .72rem 1.2rem #00000024;transform:var(--selected-transform)}to{filter:saturate(.88) contrast(.98) brightness(1.01);box-shadow:inset .06rem 0 .1rem #ffffff12,inset -.06rem 0 .1rem #0000000f,inset 0 0 0 1px #ffffff06,.05rem .08rem .12rem #00000016,.14rem .2rem .36rem #00000009;transform:translateZ(0) rotateX(0) scale(1)}}@media(max-width:36rem){.bookshelf{left:auto;width:100%;margin-top:.65rem;padding-top:0;transform:none}.bookshelf-stack{gap:.85rem;padding:.08rem 0 .72rem}.bookshelf-row{display:block;min-height:9.72rem;height:auto;padding:.35rem 0 .02rem}.bookshelf-volumes{width:100%;height:9.45rem;padding:0;justify-content:center;gap:.1rem}.shelf-book{--spine-width: min( 2.1rem, calc((100vw - 5.2rem) / var(--books-on-shelf) + var(--spine-mobile-offset)) );flex-basis:var(--spine-width)}.book-spine{--selected-transform: translate3d(0, -.72rem, 4.4rem) rotateX(-1.15deg) scale(1.05);width:var(--spine-width);max-height:9.35rem;padding-right:.3rem;padding-left:.3rem}.book-spine:after{right:-.0455rem;width:.0525rem}.book-spine-surface:before,.book-spine-surface:after{right:.25rem;left:.25rem}.book-spine-title{inset:.72rem .18rem}.book-spine:not(.is-chinese) .book-spine-title-text{max-width:8.45rem}.book-spine.is-title-xl .book-spine-title{font-size:.59rem}.book-spine.is-title-lg .book-spine-title{font-size:.54rem}.book-spine.is-title-md .book-spine-title{font-size:.49rem}.book-spine.is-title-sm .book-spine-title{font-size:.41rem}.book-spine.is-title-xs .book-spine-title{font-size:.34rem}.book-spine-author{display:none}.book-spine-mark{width:.9rem;height:.62rem;font-size:.3rem}.bookshelf-info{top:.35rem;height:4.3rem;min-height:4.3rem;margin-bottom:.1rem}.bookshelf-details{padding:.52rem .62rem .58rem;grid-template-columns:1.2rem minmax(0,1fr);grid-template-areas:"number title" "number author" ". link";column-gap:.5rem}.bookshelf-range{display:none}.bookshelf-details h3{font-size:.84rem}.bookshelf-details p:not(.bookshelf-detail-number),.bookshelf-details a{font-size:.58rem}.bookshelf-details a{margin-top:.3rem;justify-self:start}}@media(max-width:25rem){.book-spine-title{right:.14rem;left:.14rem}}@media(prefers-reduced-motion:reduce){.bookshelf-details,.book-spine,.shelf-book{animation:none;transition:none}}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;border:0;clip:rect(0 0 0 0);white-space:nowrap}.bookshelf-floor .shelf-book .book-spine.is-arming{cursor:grabbing}.bookshelf-floor .shelf-book .book-spine.is-arming .book-spine-surface:after{height:2px;background:color-mix(in srgb,var(--spine-accent) 78%,var(--spine-ink));opacity:.92;transform:scaleX(.12);animation:bookshelf-longpress-progress .52s linear both}.bookshelf.is-reordering .bookshelf-volumes{cursor:grabbing}.bookshelf.is-reordering .shelf-book:not(.is-reorder-placeholder) .book-spine{transition:transform .18s cubic-bezier(.2,.72,.2,1),filter .16s ease,opacity .15s ease}.shelf-book.is-reorder-placeholder{position:relative;z-index:1;display:flex;height:var(--spine-height);align-items:flex-end;justify-content:center;pointer-events:none;opacity:1;animation:bookshelf-placeholder-open .12s ease both}.shelf-book.is-reorder-placeholder>span{display:block;width:calc(100% - .48rem);height:.22rem;margin-bottom:-.06rem;border-radius:50%;background:radial-gradient(ellipse at center,rgba(25,22,18,.34),rgba(25,22,18,.1) 48%,transparent 74%);filter:blur(.7px);animation:bookshelf-placeholder-breathe 1.15s ease-in-out infinite alternate}.reorder-book-overlay.shelf-book{--reorder-x: 0px;--reorder-y: 0px;--reorder-tilt: 0deg;--carry-lift: -.92rem;--carry-scale: 1.03;position:absolute;z-index:100;margin:0;contain:layout style;pointer-events:none;transform:translate3d(var(--reorder-x),var(--reorder-y),0) rotate(var(--reorder-tilt));transform-origin:center 72%;transform-style:preserve-3d;will-change:transform}.reorder-book-overlay .book-spine,.reorder-book-overlay .book-spine:hover{z-index:100;cursor:grabbing;filter:saturate(.94) brightness(1.035) contrast(1.005);box-shadow:inset .12rem .01rem .2rem #ffffff24,inset -.11rem 0 .18rem #00000017,0 .38rem .72rem #0000001f,0 .92rem 1.55rem #00000029;transform:translate3d(0,var(--carry-lift),0) scale(var(--carry-scale));transform-origin:bottom center;animation:none;transition:none;will-change:transform}.reorder-book-overlay .book-spine:before{top:-.19rem;right:-.03rem;height:.21rem;transition:none}.reorder-book-overlay .book-spine:after{display:none}.reorder-book-overlay.is-settling{transition:transform .28s cubic-bezier(.18,.76,.2,1)}.reorder-book-overlay.is-settling .book-spine,.reorder-book-overlay.is-settling .book-spine:hover{filter:saturate(.88) contrast(.985) brightness(1.005);box-shadow:inset .06rem 0 .1rem #ffffff12,inset -.06rem 0 .1rem #0000000f,.05rem .08rem .12rem #00000016,.14rem .2rem .36rem #00000009;transition:transform .28s cubic-bezier(.18,.76,.2,1),box-shadow .24s ease,filter .22s ease}.reorder-book-overlay.is-settling .book-spine:before{transition:right .28s cubic-bezier(.18,.76,.2,1),height .28s ease,top .28s ease}.reorder-book-overlay.is-settling .book-spine:after{transition:right .28s cubic-bezier(.18,.76,.2,1),width .28s cubic-bezier(.18,.76,.2,1),box-shadow .24s ease}body.is-reordering-books,body.is-reordering-books *{cursor:grabbing!important;-webkit-user-select:none!important;user-select:none!important}@keyframes bookshelf-longpress-progress{to{transform:scaleX(1)}}@keyframes bookshelf-placeholder-open{0%{opacity:0}to{opacity:1}}@keyframes bookshelf-placeholder-breathe{to{opacity:.58;transform:scaleX(.82)}}.bookshelf-floor .shelf-book .book-spine.is-drop-resting,.bookshelf-floor .shelf-book .book-spine.is-drop-resting:hover,.bookshelf-floor .shelf-book .book-spine.is-drop-resting:focus-visible{filter:saturate(.88) contrast(.98) brightness(1.01)!important;box-shadow:inset .06rem 0 .1rem #ffffff12,inset -.06rem 0 .1rem #0000000f,inset 0 0 0 1px #ffffff06,.05rem .08rem .12rem #00000016,.14rem .2rem .36rem #00000009;transform:translateZ(0) scale(1)!important;animation:none!important;transition:transform .18s cubic-bezier(.2,.72,.2,1),box-shadow .18s ease,filter .16s ease}@media(prefers-reduced-motion:reduce){.bookshelf-floor .shelf-book .book-spine.is-arming,.bookshelf-floor .shelf-book .book-spine.is-arming .book-spine-surface:after,.shelf-book.is-reorder-placeholder,.shelf-book.is-reorder-placeholder>span,.reorder-book-overlay,.reorder-book-overlay .book-spine{animation:none;transition:none}}