:root{color-scheme:light;--paper:#faf9f5;--ink:#243631;--muted:#6e7b74;--accent:#26735a;--line:#dce3db;--soft:#edf2eb;--serif:"Iowan Old Style","Palatino Linotype","Yu Mincho","Hiragino Mincho ProN",serif;--sans:Inter,-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif}
*{box-sizing:border-box}
html{scroll-padding-top:100px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:2.15;overflow-wrap:anywhere}
a{color:var(--accent);text-underline-offset:5px;text-decoration-thickness:1px}
a:hover{color:#114c39}
a:focus-visible{outline:3px solid #bf8b38;outline-offset:5px;border-radius:2px}
.skip-link{position:fixed;left:16px;top:-100px;background:var(--ink);color:white;padding:8px 20px;z-index:20}
.skip-link:focus{top:12px}
.site-header{height:82px;padding:0 max(32px,calc((100vw - 1376px)/2));border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px;background:rgba(250,249,245,.97);position:sticky;top:0;z-index:10}
.brand{display:flex;align-items:center;gap:13px;color:var(--ink);font-family:var(--serif);font-size:23px;letter-spacing:-.6px;text-decoration:none;white-space:nowrap}
.brand-mark{display:grid;place-items:center;color:var(--paper);background:var(--ink);font-size:23px;width:34px;height:34px;line-height:1;border-radius:50% 50% 4px 50%;font-style:italic}
.header-home{font-size:10px;letter-spacing:.1em;text-decoration:none;white-space:nowrap}
.header-home span{margin-left:18px}
.page-layout{max-width:1376px;margin:0 auto;display:grid;grid-template-columns:244px minmax(0,1fr);gap:64px;padding:54px 32px 80px}
.sidebar{align-self:start;position:sticky;top:120px;max-height:calc(100vh - 145px);overflow:auto;padding-right:14px;scrollbar-width:thin}
.nav-label{font-size:10px;color:var(--muted);letter-spacing:.2em;margin:0 0 20px;font-weight:600}
.sidebar nav>a{display:flex;gap:14px;padding:10px 12px;margin:3px 0;color:#68766c;text-decoration:none;font-size:12px;line-height:1.8;border-radius:5px}
.sidebar nav>a>span{font-size:10px;letter-spacing:.06em;opacity:.65;padding-top:2px}
.sidebar nav>a:hover{background:var(--soft)}
.sidebar nav>a[aria-current="page"]{background:#e5ece2;color:#244e3a;font-weight:600}
.page-toc{border-top:1px solid var(--line);margin-top:30px;padding-top:27px}
main{min-width:0;max-width:890px}
article{display:flow-root}
.eyebrow{font-size:10px;color:var(--muted);letter-spacing:.14em;text-transform:uppercase;line-height:1.8;margin:0 0 32px}
.chapter-label{color:var(--accent);font-size:11px;letter-spacing:.18em;margin-bottom:12px}
h1{font-size:clamp(30px,3vw,44px);font-weight:500;letter-spacing:-.035em;line-height:1.5;margin:0 0 40px;padding-bottom:32px;border-bottom:1px solid var(--line)}
h2{clear:both;margin:55px 0 25px;padding-top:28px;border-top:1px solid var(--line);font-size:23px;line-height:1.7;font-weight:600}
p{margin:1.6em 0}
ol{padding-left:1.8em}
li{padding-left:5px;margin:.9em 0}
li::marker{color:var(--accent)}
sub,sup{line-height:0;font-size:.75em}
img{max-width:100%;height:auto;vertical-align:middle}
article img{background:white;border:1px solid var(--line);padding:14px;border-radius:7px}
img[align="right"]{float:right;margin:8px 0 24px 30px;max-width:43%}
.simulation-gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:36px 0}
.simulation-gallery img{width:100%;height:auto}
.equation{clear:both;display:flex;align-items:center;gap:18px;background:#f0f3ed;border:1px solid #e2e7de;border-radius:7px;padding:13px 20px;margin:30px 0;max-width:100%;font-size:1.03em}
.equation-math{flex:1;min-width:0;overflow-x:auto;padding:4px 0}
.equation-number{font-size:11px;color:var(--muted);white-space:nowrap;font-variant-numeric:tabular-nums}
.equation mjx-container[display="true"]{margin:.7em 0!important}
mjx-container{overflow-wrap:normal}
.chapter-pager{clear:both;display:flex;justify-content:space-between;gap:24px;margin-top:54px;padding-top:26px;border-top:1px solid var(--line);font-size:0}
.chapter-pager a{font-size:13px;text-decoration:none;padding:12px 0}
.chapter-pager a:first-child:before{content:'←';margin-right:16px}
.chapter-pager a:last-child:after{content:'→';margin-left:16px}
.article-footer{clear:both;margin-top:30px;padding-top:24px;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}
hr{clear:both;border:0;border-top:1px solid var(--line);margin:46px 0 24px}
.contents-page h1{font-size:clamp(29px,3vw,40px);border:0;margin:0 0 20px;padding:0}
.edition{display:block;font-size:12px;letter-spacing:.1em;color:var(--muted);margin-top:14px;font-weight:400}
.cover-art{float:right;width:190px;margin:8px 0 30px 38px}
.cover-art img{display:block;width:100%;padding:12px;margin-bottom:12px}
.cover-art font{display:block;font-size:11px;line-height:1.9;color:var(--muted)}
.cover-art br{display:none}
.byline{font-size:12px;color:var(--muted);margin:0 0 32px}
.chapter-cards{display:grid;grid-template-columns:1fr;counter-reset:chapter;margin:30px 0}
.chapter-cards h3{counter-increment:chapter;margin:0;padding:18px 0;border-top:1px solid var(--line);font-size:17px;font-weight:500;line-height:1.8}
.chapter-cards h3 a{display:block;text-decoration:none;color:var(--ink)}
.chapter-cards h3 a:before{content:counter(chapter,decimal-leading-zero);display:inline-block;width:37px;font-size:11px;color:var(--accent);vertical-align:middle;letter-spacing:.08em}
.chapter-cards h3 a:after{content:'↗';float:right;color:var(--accent);font-size:14px}
.publication-note{clear:both;background:var(--soft);border-left:2px solid #86a58c;padding:20px 24px;font-size:12px;line-height:2}
.publication-note br{display:none}
.contents-page ol{font-size:13px;color:#526258}
.home-link{font-size:11px;letter-spacing:.1em}
.home-link a{text-decoration:none}
@media(min-width:1500px){.page-layout{gap:90px}main{max-width:900px}}
@media(max-width:1100px){.page-layout{grid-template-columns:200px minmax(0,1fr);gap:35px;padding-left:24px;padding-right:24px}.sidebar nav>a{font-size:11px;padding-left:8px;padding-right:8px}.cover-art{width:155px;margin-left:25px}.chapter-cards h3{font-size:15px}.equation{padding:10px 14px}}
@media(max-width:760px){
 body{font-size:14px;line-height:2.1}
 .site-header{height:65px;padding:0 18px;gap:12px}
 .brand{font-size:19px;gap:9px}.brand-mark{width:28px;height:28px;font-size:20px}
 .header-home{font-size:8px;letter-spacing:.03em}.header-home span{margin-left:5px}
 .page-layout{display:block;padding:20px 20px 50px}
 .sidebar{position:static;max-height:none;padding:0;margin-bottom:35px;border-bottom:1px solid var(--line)}
 .sidebar>nav:first-child{display:flex;overflow-x:auto;gap:8px;padding-bottom:15px;scrollbar-width:thin}
 .sidebar>nav:first-child>.nav-label{display:none}.sidebar nav>a{flex-shrink:0;font-size:11px;padding:7px 10px;gap:7px}.page-toc{display:none}
 h1{font-size:29px;margin-bottom:30px;padding-bottom:25px}h2{font-size:20px;margin-top:40px}
 .eyebrow{font-size:9px;margin-bottom:25px}
 .equation{margin:24px 0;padding:9px 12px;gap:10px;font-size:.9em}.equation-number{font-size:10px}
 img[align="right"]{float:none;display:block;max-width:100%;margin:24px auto;padding:10px}
 .simulation-gallery{grid-template-columns:1fr;gap:16px;margin:28px 0}
 .cover-art{width:110px;margin:4px 0 20px 18px}.cover-art img{padding:7px}
 .cover-art font{font-size:10px;line-height:1.8}.contents-page h1{font-size:27px}.edition{font-size:11px}
 .byline{font-size:11px}.chapter-cards{clear:both}.chapter-cards h3{font-size:16px;padding:17px 0}
 .publication-note{padding:16px}.contents-page ol{font-size:12px}
 .chapter-pager{margin-top:38px}
}
@media(max-width:360px){.brand{font-size:17px}.brand-mark{width:25px;height:25px}.header-home{font-size:7px}.site-header{padding:0 14px}}
@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}a{transition:color .15s,background-color .15s}}
@media print{body{background:white;color:black}.site-header,.sidebar,.skip-link,.chapter-pager{display:none}.page-layout{display:block;padding:0}main{max-width:none}h1{font-size:26pt}.equation,img,.simulation-gallery{break-inside:avoid}.equation{background:white}a{color:inherit;text-decoration:none}}
/* Illustration layouts preserve the full original images and captions. */
font{font-size:inherit}
.contents-page .cover-art{width:240px;margin:3px 0 28px 35px}
.cover-art img[align="right"]{float:none;display:block;max-width:100%;margin:0;padding:0;border:0;border-radius:4px}
.contents-page h1{font-size:36px;line-height:1.6}
.contents-page .publication-note{clear:none;display:flow-root;margin:20px 0 30px}
.contents-page .chapter-cards{clear:both;grid-template-columns:1fr 1fr;column-gap:30px}
.contents-page .chapter-cards h3{font-size:16px;min-width:0}
.article-figure{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.9fr);align-items:end;gap:28px;margin:36px 0;padding:24px;background:#fff;border:1px solid var(--line);border-radius:8px}
.article-figure img{display:block;width:100%;height:auto;padding:0;border:0;border-radius:0}
.article-figure figcaption{font-size:12px;color:#526258;line-height:1.95}
.article-figure figcaption br{display:none}
.article-figure figcaption font{font-size:inherit}
.cover-caption{font-size:12px;color:var(--muted)}
.chapter-pager a:first-child:before,.chapter-pager a:last-child:after{content:none}
.chapter-pager a:first-child:before{content:'←';margin-right:10px}
.chapter-pager a:last-child:after{content:'→';margin-left:10px}
@media(min-width:761px) and (max-width:1100px){.contents-page .cover-art{width:180px;margin-left:24px}.contents-page h1{font-size:29px}.contents-page .chapter-cards{grid-template-columns:1fr}.article-figure{gap:20px;padding:20px}}
@media(max-width:760px){
 .contents-page .cover-art{width:118px;margin:3px 0 20px 18px}
 .contents-page h1{font-size:26px;line-height:1.65}
 .contents-page .publication-note{clear:both;margin-top:30px}
 .contents-page .chapter-cards{grid-template-columns:1fr;gap:0}
 .article-figure{grid-template-columns:1fr;gap:18px;padding:18px;margin:28px 0}
 .article-figure img{width:auto;max-width:100%;margin:auto}
 .article-figure figcaption{font-size:12px}
 .chapter-pager{gap:10px}.chapter-pager a{min-height:44px}
}
@media print{.article-figure{break-inside:avoid}.contents-page .cover-art{width:180px}}