:root{--paper:#f7f6f5;--ink:#111;--blue:#003dff;--line:#b9b8b5;--serif:"Noto Serif TC",serif;--sans:"Archivo","Noto Sans TC",sans-serif;--mono:"SFMono-Regular",Consolas,monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:14px}a{color:inherit;text-decoration:none}button,input{font:inherit}button{color:inherit}.site-header{height:76px;padding:0 3.2vw;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;border-bottom:1px solid #d5d4d1;position:sticky;top:0;z-index:20;background:rgba(247,246,245,.94);backdrop-filter:blur(10px)}.brand{font-weight:600;letter-spacing:.04em;color:var(--blue);display:flex;align-items:center;gap:10px}.brand span{width:11px;height:11px;border-radius:50%;background:var(--blue)}nav{display:flex;gap:38px}nav a{font-size:12px}nav b{color:var(--blue);margin-right:7px}.portfolio-link{justify-self:end;font-size:12px}.hero{min-height:610px;padding:42px 3.2vw 30px;display:grid;grid-template-columns:2fr 4fr;grid-template-rows:auto 1fr;gap:30px;position:relative}.signature{font-family:var(--serif);display:flex;flex-direction:column}.signature strong{font-size:43px;letter-spacing:-.16em;max-width:90px;line-height:.9}.signature span{font-size:20px;margin-top:8px}.archive-meta{align-self:center;border-top:1px solid var(--ink);padding-top:12px;display:flex;justify-content:space-between;font:9px var(--mono);letter-spacing:.04em}.archive-meta span+span{border-left:1px solid #bbb;padding-left:22px}.hero-copy{grid-column:1/-1;align-self:end}.eyebrow{font-size:11px;line-height:1.6}.hero h1{font-family:var(--serif);font-size:clamp(86px,13vw,190px);line-height:.86;letter-spacing:-.1em;color:var(--blue);margin:54px 0 30px}.lead{font-family:var(--serif);font-weight:700;font-size:clamp(22px,2.4vw,40px);margin:0}.count{font-family:var(--mono);font-size:16px;letter-spacing:.05em;margin-top:25px}.count strong{color:var(--blue)}.count i{font-style:normal;margin:0 12px}.library{padding:0 3.2vw}.search{height:64px;border-top:1px solid;border-bottom:1px solid;display:flex;align-items:center;gap:15px}.search span{font-size:24px;transform:rotate(-18deg)}.search input{border:0;outline:0;background:none;width:100%;font-family:var(--serif);font-size:16px}.search kbd{border:1px solid #aaa;padding:2px 7px;font:11px var(--mono)}.filters{display:flex;gap:8px;overflow:auto;padding:20px 0 12px;scrollbar-width:none}.filter{white-space:nowrap;background:none;border:1px solid #aaa;padding:7px 10px;cursor:pointer;font-size:11px}.filter:hover,.filter.active{background:var(--blue);border-color:var(--blue);color:white}.result-status{height:20px;margin:0 0 10px;font:10px var(--mono);letter-spacing:.04em}.shelf-stage{min-height:410px;display:grid;grid-template-columns:minmax(240px,28%) 1fr;background:#efede9;border-bottom:23px solid #5c3926;box-shadow:0 8px 0 #25170f;overflow:hidden}.selected-book{padding:48px 36px;display:flex;flex-direction:column;border-right:1px solid #bbb;background:var(--paper)}.selected-book .num{font:10px var(--mono);border-bottom:1px solid;width:100px;padding-bottom:12px}.selected-book h3{font-family:var(--serif);font-size:clamp(28px,3.2vw,52px);line-height:1.1;margin:24px 0 12px}.selected-book .author{font:italic 22px "Newsreader",serif;margin:0 0 26px}.selected-book .category{font:10px var(--mono);color:var(--blue);margin-top:auto}.book-actions{display:flex;gap:18px;margin-top:14px}.book-actions a{font-size:11px;border-bottom:1px solid;padding:8px 0}.book-shelf{display:flex;align-items:flex-end;gap:6px;padding:36px 22px 0;overflow-x:auto;scrollbar-width:thin;scrollbar-color:var(--blue) transparent}.spine{flex:0 0 auto;width:54px;height:310px;padding:16px 9px;border:0;border-left:1px solid rgba(0,0,0,.18);border-right:1px solid rgba(255,255,255,.25);background:#161616;color:white;cursor:pointer;writing-mode:vertical-rl;text-align:left;letter-spacing:.08em;overflow:hidden}.spine:nth-child(4n+2){height:335px;background:#e2ded4;color:#111}.spine:nth-child(4n+3){height:300px;background:var(--blue)}.spine:nth-child(4n+4){height:325px;background:#7a2928}.spine.active{outline:5px solid var(--blue);outline-offset:2px}.spine small{font:9px var(--mono);margin-top:12px}.shelf-note{display:flex;justify-content:space-between;padding:20px 2px 24px;font:10px var(--mono)}.index-grid{margin:12px 3.2vw 0;display:grid;grid-template-columns:1fr 1.1fr;border-top:1px solid;border-bottom:1px solid}.latest{padding-right:24px;border-right:1px solid}.path-panel{padding-left:24px}.section-heading{height:70px;display:flex;justify-content:space-between;align-items:center}.section-heading h2{font-size:13px;font-weight:500;letter-spacing:.06em}.section-heading small{font:11px var(--serif);margin-left:8px}.section-heading button,.section-heading span{border:0;background:none;font:9px var(--mono);cursor:pointer}.latest-row{width:100%;display:grid;grid-template-columns:48px 1fr 1fr;border-top:1px solid #ccc;padding:11px 0;background:none;border-left:0;border-right:0;border-bottom:0;text-align:left;cursor:pointer;font-size:11px}.latest-row:hover{color:var(--blue)}.latest-row .n{font:9px var(--mono)}.latest-row .a{color:#555}.path-viz{min-height:306px;position:relative}.path-line{position:absolute;height:1px;background:#999;transform-origin:left center;z-index:0}.path-node{position:absolute;transform:translate(-50%,-50%);background:var(--paper);border:0;cursor:pointer;z-index:2;font-family:var(--serif);font-size:11px;padding:5px}.path-node:before{content:"";display:block;width:7px;height:7px;border-radius:50%;background:var(--ink);margin:0 auto 5px}.path-node.active{color:var(--blue);font-weight:700}.path-node.active:before{background:var(--blue);width:11px;height:11px}.about{margin:105px 3.2vw;padding:45px 0;border-top:1px solid;display:grid;grid-template-columns:1fr 2fr 1fr;gap:30px}.about h2{font-family:var(--serif);font-size:clamp(36px,5vw,78px);line-height:1.15;margin:0;grid-column:2}.about>div{grid-column:3;align-self:end;line-height:1.8}.about a{display:inline-block;color:var(--blue);border-bottom:1px solid;margin-top:18px}footer{margin:0 3.2vw;padding:20px 0 38px;border-top:1px solid;display:flex;justify-content:space-between;font:9px var(--mono)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:800px){.site-header{height:64px;grid-template-columns:1fr auto}.brand{font-size:11px}nav{display:none}.hero{min-height:560px;grid-template-columns:1fr;padding-top:28px}.signature{display:none}.archive-meta{grid-column:1;overflow:hidden;gap:14px}.archive-meta span:nth-child(n+3){display:none}.hero h1{font-size:25vw;margin:70px 0 24px}.lead{font-size:25px}.count{font-size:12px}.filters{margin-right:-3.2vw}.shelf-stage{grid-template-columns:1fr;min-height:610px}.selected-book{min-height:285px;border-right:0;border-bottom:1px solid #bbb;padding:28px 24px}.selected-book .category{margin-top:20px}.book-shelf{height:325px;padding-top:20px}.spine{height:260px!important;width:48px}.index-grid{grid-template-columns:1fr}.latest{padding-right:0;border-right:0;border-bottom:1px solid}.path-panel{padding-left:0}.about{grid-template-columns:1fr;margin-top:70px}.about h2,.about>div{grid-column:1}.about h2{font-size:42px}.about>div{max-width:420px}.shelf-note{display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.book-actions button{font-size:11px;border:0;border-bottom:1px solid;padding:8px 0;background:none;cursor:pointer}.note-dialog{width:min(900px,92vw);height:min(88vh,980px);max-width:none;max-height:none;margin:auto;padding:0;border:1px solid var(--ink);background:var(--paper);color:var(--ink)}.note-dialog::backdrop{background:rgba(0,0,0,.66)}.note-dialog>header{position:sticky;top:0;z-index:2;display:flex;justify-content:space-between;align-items:flex-start;padding:24px 30px;border-bottom:1px solid;background:var(--paper)}.note-dialog header span{font:10px var(--mono);color:var(--blue)}.note-dialog header h2{font:700 clamp(25px,4vw,48px)/1.15 var(--serif);margin:8px 0 0}.note-dialog header button{border:0;background:none;font-size:34px;line-height:1;cursor:pointer}.note-content{max-width:720px;margin:auto;padding:46px 34px 90px;font-family:var(--serif);font-size:17px;line-height:1.9}.note-content h1{font-size:42px;line-height:1.25;margin:1.5em 0 .7em}.note-content h2{font-size:30px;line-height:1.35;margin:1.7em 0 .6em;color:var(--blue)}.note-content h3{font-size:22px;line-height:1.5;margin:1.5em 0 .5em}.note-content h4{font-size:18px}.note-content p{margin:.8em 0}.note-content li{margin:.35em 0}.note-content a{color:var(--blue);border-bottom:1px solid}.note-content code{font-family:var(--mono);background:#eceae6;padding:2px 5px}.note-content hr{border:0;border-top:1px solid;margin:42px 0}.note-loading,.note-error{font-family:var(--mono);font-size:12px}.note-error{color:#b00020}@media(max-width:600px){.note-dialog{width:100vw;height:100vh;border:0}.note-dialog>header{padding:18px}.note-content{padding:30px 20px 70px;font-size:16px}.note-content h1{font-size:30px}.note-content h2{font-size:24px}}
.note-content figure{margin:32px 0;padding:22px;background:#eeece8;text-align:center}.note-content figure img{display:block;max-width:100%;max-height:620px;margin:auto;object-fit:contain}.note-content figcaption{margin-top:10px;font:10px var(--mono);color:#555}.video{position:relative;width:100%;aspect-ratio:16/9;margin:34px 0 10px;background:#111}.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.media-link{display:inline-block;font:10px var(--mono);margin-bottom:24px}

/* Real-cover 3D bookshelf */
.book-shelf{display:flex;align-items:flex-end;gap:22px;padding:42px 34px 18px;overflow-x:auto;overflow-y:hidden;perspective:1200px;scrollbar-width:thin;scrollbar-color:var(--blue) transparent}
.book-3d{flex:0 0 144px;border:0;background:none;padding:0 8px 2px;color:var(--ink);cursor:pointer;text-align:center}
.book-object{position:relative;display:block;width:128px;height:212px;transform:perspective(760px) rotateY(-11deg);transform-origin:left center;transition:transform .28s ease,filter .28s ease;filter:drop-shadow(12px 14px 10px rgba(24,18,14,.24))}
.book-object:before{content:"";position:absolute;left:0;right:7px;bottom:-7px;height:7px;background:#c9c3ba;clip-path:polygon(0 0,100% 0,94% 100%,4% 100%)}
.book-object:after{content:"";position:absolute;top:4px;right:-8px;width:8px;height:204px;background:#b8b1a7;transform:skewY(38deg);transform-origin:left top}
.book-front{position:absolute;inset:0;z-index:2;display:grid;place-items:center;overflow:hidden;background:#e9e5de;border:1px solid rgba(17,17,17,.24);box-shadow:inset 5px 0 0 rgba(0,0,0,.08)}
.book-front img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:#ddd8d0}
.cover-fallback{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:space-between;padding:22px 15px 18px;border-top:8px solid var(--blue);background:#ece8e1}
.cover-fallback b{font:700 18px/1.35 var(--serif)}
.cover-fallback small{font:9px/1.5 var(--mono)}
.book-caption{display:block;margin-top:17px;font:9px var(--mono);letter-spacing:.06em;color:#555}
.book-3d:hover .book-object,.book-3d:focus-visible .book-object{transform:perspective(760px) rotateY(-2deg) translateY(-11px);filter:drop-shadow(15px 19px 13px rgba(24,18,14,.28))}
.book-3d.active .book-object{transform:perspective(760px) rotateY(-2deg) translateY(-7px)}
.book-3d.active .book-front{outline:5px solid var(--blue);outline-offset:4px}
.book-3d.active .book-caption{color:var(--blue);font-weight:700}
@media(max-width:800px){.shelf-stage{min-height:620px}.book-shelf{height:335px;padding:36px 22px 15px;gap:16px}.book-3d{flex-basis:116px;padding:0 6px}.book-object{width:102px;height:170px}.book-object:after{height:162px}.cover-fallback{padding:17px 10px 14px}.cover-fallback b{font-size:15px}}
@media(prefers-reduced-motion:reduce){.book-object{transition:none}}

/* Complete searchable library */
.all-books{margin:110px 3.2vw 0;border-top:1px solid;padding-top:36px}.catalog-heading{display:grid;grid-template-columns:2fr 1fr;gap:30px;align-items:end;margin-bottom:46px}.catalog-heading h2{font:900 clamp(52px,8vw,118px)/.92 var(--serif);letter-spacing:-.07em;margin:14px 0 0;color:var(--blue)}.catalog-heading>p{justify-self:end;font:11px/1.75 var(--mono);margin:0}.catalog-heading>p strong{font-size:25px;color:var(--blue)}.catalog-tools{display:grid;grid-template-columns:1fr 230px;border-top:1px solid;border-bottom:1px solid}.catalog-search{height:68px;display:flex;align-items:center;gap:14px;border-right:1px solid;padding:0 18px}.catalog-search>span{font-size:24px;transform:rotate(-18deg)}.catalog-search input{width:100%;border:0;outline:0;background:none;font:16px var(--serif)}.catalog-select{display:grid;grid-template-columns:auto 1fr;align-items:center;gap:12px;padding:0 18px}.catalog-select span{font:9px var(--mono);color:#555}.catalog-select select{width:100%;border:0;outline:0;background:transparent;font:12px var(--sans)}.catalog-columns,.catalog-row{display:grid;grid-template-columns:150px minmax(260px,1fr) 160px 150px;column-gap:22px;align-items:center}.catalog-columns{padding:16px 0;border-bottom:1px solid;font:9px var(--mono);color:#666}.catalog-row{min-height:112px;border-bottom:1px solid #c9c8c5;transition:color .18s ease}.catalog-row:hover{color:var(--blue)}.catalog-cover{display:flex;align-items:center;gap:15px;font:9px var(--mono)}.catalog-cover img{width:48px;height:72px;object-fit:contain;background:#e5e2dc;filter:drop-shadow(4px 5px 3px rgba(0,0,0,.18))}.catalog-cover span{color:#555}.catalog-title{display:flex;flex-direction:column;gap:8px;min-width:0}.catalog-title strong{font:700 20px/1.35 var(--serif)}.catalog-title small{font:italic 15px "Newsreader",var(--serif);color:#555}.catalog-category{font:11px var(--mono)}.catalog-open{justify-self:start;border-bottom:1px solid;padding:8px 0;font:10px var(--mono)}.catalog-empty{padding:60px 0;font:16px var(--serif)}.load-more{display:block;margin:34px auto 0;border:1px solid;background:none;padding:14px 28px;cursor:pointer;font:10px var(--mono)}.load-more:hover{background:var(--blue);border-color:var(--blue);color:#fff}.load-more[hidden]{display:none}

/* Standalone book note page */
.book-page-header .back-library{justify-self:center;font:11px var(--mono)}.book-page-main{min-height:80vh}.book-page-loading,.book-page-error{padding:90px 3.2vw;font:12px var(--mono)}.book-page-hero{display:grid;grid-template-columns:minmax(210px,28%) 1fr;min-height:520px;border-bottom:1px solid}.book-page-cover{display:grid;place-items:center;padding:70px 3.2vw;background:#eeece8;border-right:1px solid}.book-page-cover img{display:block;width:min(230px,80%);max-height:340px;object-fit:contain;filter:drop-shadow(18px 20px 13px rgba(24,18,14,.25));transform:perspective(900px) rotateY(-8deg)}.book-page-meta{padding:72px 5vw;display:flex;flex-direction:column;align-items:flex-start}.book-page-meta .num{font:10px var(--mono);color:var(--blue)}.book-page-meta h1{max-width:900px;font:900 clamp(44px,7vw,105px)/1.05 var(--serif);letter-spacing:-.055em;margin:28px 0 18px}.book-page-meta .author{font:italic clamp(22px,3vw,38px) "Newsreader",serif;margin:0}.book-page-meta .category{margin-top:auto;font:10px var(--mono);color:var(--blue)}.book-page-actions{display:flex;gap:22px;align-items:center;margin-top:18px}.book-page-actions a,.book-page-actions button{border:0;border-bottom:1px solid;background:none;padding:8px 0;cursor:pointer;font:10px var(--mono)}.book-page-note{max-width:780px;margin:0 auto;padding:80px 32px 130px}.book-page-note>.note-content{max-width:none;padding:0}.book-page-note-heading{font:10px var(--mono);color:var(--blue);border-bottom:1px solid;padding-bottom:18px;margin-bottom:44px}
@media(max-width:800px){.all-books{margin-top:75px}.catalog-heading{grid-template-columns:1fr;margin-bottom:30px}.catalog-heading>p{justify-self:start}.catalog-tools{grid-template-columns:1fr}.catalog-search{border-right:0;border-bottom:1px solid}.catalog-select{height:58px}.catalog-columns{display:none}.catalog-row{grid-template-columns:82px 1fr auto;gap:14px;padding:18px 0}.catalog-cover{gap:8px}.catalog-cover img{width:39px;height:58px}.catalog-title strong{font-size:16px}.catalog-category{display:none}.catalog-open{font-size:0}.catalog-open:after{content:"↗";font-size:18px}.book-page-hero{grid-template-columns:1fr}.book-page-cover{min-height:340px;border-right:0;border-bottom:1px solid;padding:45px 20px}.book-page-cover img{width:auto;height:250px}.book-page-meta{min-height:430px;padding:45px 5vw}.book-page-meta h1{font-size:48px}.book-page-meta .category{margin-top:60px}.book-page-note{padding:55px 20px 90px}}
.book-actions{flex-wrap:wrap}

/* Playlist-first YouTube presentation */
.book-page-video{max-width:1280px;margin:0 auto;padding:72px 32px 42px}
.book-page-video .video{margin:18px 0 10px;box-shadow:0 20px 48px rgba(0,0,0,.16)}
.book-page-video-label,.note-video-label{font:10px var(--mono);letter-spacing:.05em;color:var(--blue);border-bottom:1px solid;padding-bottom:16px}
.book-page-video-search{max-width:780px;padding-bottom:10px}
.book-page-video-search h2{font:700 clamp(24px,3vw,42px)/1.25 var(--serif);margin:28px 0 20px}
.book-page-video-search a,.note-video-search a{display:inline-block;color:var(--blue);border-bottom:1px solid;padding-bottom:5px;font:11px var(--mono)}
.note-featured-video{margin:0 0 52px}
.note-featured-video .video{margin-top:18px}
.note-video-search{margin:0 0 52px;padding:25px;border:1px solid var(--line);font-family:var(--sans)}
.note-video-search p{margin-top:0}
@media(max-width:800px){.book-page-video{padding:44px 20px 25px}.book-page-video-search{padding-bottom:5px}}

/* Full-bleed cover presentation */
.shelf-stage{min-height:500px;border-bottom:1px solid var(--ink);box-shadow:none}
.book-shelf{gap:28px;padding:48px 38px 24px}
.book-3d{flex-basis:214px;padding:0 10px 2px}
.book-object{width:190px;height:304px}
.book-object:after{height:296px}
.book-front img{object-fit:cover;background:transparent}
.book-caption{margin-top:20px}
@media(max-width:800px){.shelf-stage{min-height:700px}.book-shelf{height:410px;padding:42px 24px 22px;gap:22px}.book-3d{flex-basis:174px;padding:0 8px}.book-object{width:158px;height:252px}.book-object:after{height:244px}}

/* Supplied RAUM+ laboratory logo */
.signature{display:block}
.signature-logo{display:block;width:clamp(142px,12vw,184px);height:auto;object-fit:contain}

/* Bidirectional RAUM+ site links */
footer{gap:24px;align-items:center}
footer a{color:var(--blue);border-bottom:1px solid currentColor}
@media(max-width:600px){footer{flex-wrap:wrap}footer a{order:3;width:100%;padding-top:6px}}