:root{
--bg:#f2f5f7;--surface:#fff;--ink:#14212b;--muted:#56666f;--line:#d9e1e7;
--accent:#0b6b6f;--accent-ink:#fff;--accent-soft:#dcefef;--warn:#8a4b00;
--serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Times New Roman",serif;
--sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
--r:10px;--maxw:1080px}
@media(prefers-color-scheme:dark){:root:not([data-theme="light"]){
--bg:#0e161c;--surface:#16212a;--ink:#e6edf1;--muted:#9fb0ba;--line:#27363f;
--accent:#4fc3c7;--accent-ink:#062a2c;--accent-soft:#143338;--warn:#e7b26a}}
:root[data-theme="dark"]{--bg:#0e161c;--surface:#16212a;--ink:#e6edf1;--muted:#9fb0ba;--line:#27363f;
--accent:#4fc3c7;--accent-ink:#062a2c;--accent-soft:#143338;--warn:#e7b26a}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:70px}
body{margin:0;min-height:100vh;display:flex;flex-direction:column;background:var(--bg);color:var(--ink);font:400 16px/1.6 var(--sans)}
main{flex:1}
a{color:var(--accent)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:var(--accent-ink);padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
h1,h2,h3{font-family:var(--serif);line-height:1.2;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(2rem,5.5vw,3.3rem);font-weight:700}
h2{font-size:clamp(1.4rem,3vw,1.8rem);font-weight:600}
h3{font-size:1.1rem;font-weight:600}
p{margin:0 0 1em}
ul.plain{list-style:none;margin:0;padding:0}
.muted{color:var(--muted)}.small{font-size:.875rem}

/* header */
.site-header{position:sticky;top:0;z-index:20;background:var(--bg);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;flex-wrap:wrap;gap:8px 16px;min-height:62px}
.brand{font:700 1.3rem var(--serif);text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:8px}
.brand svg{width:26px;height:26px}
.nav{margin-left:auto;display:flex;align-items:center;flex-wrap:wrap;gap:4px}
.nav a{padding:8px 12px;border-radius:8px;text-decoration:none;color:var(--ink);font-weight:500}
.nav a:hover,.nav a[aria-current="page"]{background:var(--accent-soft);color:var(--accent)}
.icon-btn{background:none;border:1px solid var(--line);color:var(--ink);width:40px;height:40px;border-radius:8px;cursor:pointer;font-size:1.1rem}
.icon-btn:hover{background:var(--accent-soft)}
#menuBtn{display:none}
@media(max-width:720px){
.js #menuBtn{display:block;margin-left:auto}
.js .nav{display:none;width:100%;flex-direction:column;align-items:stretch;margin:0;padding-bottom:12px}
.js .nav.open{display:flex}}

/* buttons & forms */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:9px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:600 .95rem var(--sans);text-decoration:none;cursor:pointer}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn.primary:hover{filter:brightness(1.08)}
.btn-row{display:flex;flex-wrap:wrap;gap:10px}
input,select,textarea{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:9px;background:var(--surface);color:var(--ink);font:inherit}
input[type=checkbox]{width:auto}
.field{display:grid;gap:6px;margin-bottom:14px}
.field label{font-weight:600;font-size:.9rem}
textarea{min-height:140px;resize:vertical}

/* hero */
.hero{padding:48px 0 0}
.lead{font-size:1.15rem;color:var(--muted);max-width:52ch}
.searchbox{display:flex;gap:8px;max-width:520px;margin:22px 0 0}
.shelf{display:flex;align-items:flex-end;gap:6px;margin-top:40px;padding:0 4px;overflow-x:auto;border-bottom:10px solid var(--ink);scrollbar-width:none;height:230px}
.shelf::-webkit-scrollbar{display:none}
.spine{flex:0 0 auto;color:#fff;font:600 .95rem var(--serif);writing-mode:vertical-rl;padding:14px 8px;border-radius:3px 3px 0 0;text-decoration:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;box-shadow:inset -3px 0 0 rgba(0,0,0,.18),inset 3px 0 0 rgba(255,255,255,.12);transition:transform .15s}
.spine:hover,.spine:focus-visible{transform:translateY(-10px)}
@media(prefers-reduced-motion:reduce){.spine{transition:none}}

/* sections & grid */
.block{padding:48px 0 0}
.head-row{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:22px;list-style:none;margin:0;padding:0}
.card{display:flex;flex-direction:column;gap:6px;text-decoration:none;color:inherit}
.card .t{font:600 1rem/1.3 var(--serif);margin-top:4px}
.card .a{font-size:.875rem;color:var(--muted)}
.card:hover .t{color:var(--accent)}
.cover{position:relative;aspect-ratio:2/3;border-radius:4px 8px 8px 4px;color:#fff;padding:16px 14px 14px 20px;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden;box-shadow:0 8px 20px -10px rgba(0,0,0,.5)}
.cover::before{content:"";position:absolute;left:0;top:0;bottom:0;width:8px;background:rgba(0,0,0,.22)}
.cover .ct{font:700 1.15rem/1.2 var(--serif)}.cover .ca{font:500 .75rem var(--sans);opacity:.9}
.cover.lg{max-width:260px;width:100%}.cover.lg .ct{font-size:1.5rem}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{padding:7px 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:500 .9rem var(--sans);text-decoration:none}
.chip:hover,.chip[aria-current="page"]{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:28px;margin:0;padding:0;list-style:none}
.steps li{padding-top:14px;border-top:3px solid var(--accent)}
.steps b{display:block;font-family:var(--serif);font-size:1.1rem;margin-bottom:4px}

/* library */
.tools{display:grid;grid-template-columns:1fr 180px 160px;gap:10px;margin:18px 0}
@media(max-width:640px){.tools{grid-template-columns:1fr}}
.empty{padding:48px 0;text-align:center;color:var(--muted)}
[hidden]{display:none!important}

/* book page */
.crumbs{padding-top:24px;font-size:.9rem;color:var(--muted)}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"/";margin-right:6px}
.crumbs a{text-decoration:none}
.book{display:grid;grid-template-columns:260px 1fr;gap:40px;padding-top:28px}
@media(max-width:760px){.book{grid-template-columns:1fr;gap:24px}}
.meta{display:grid;grid-template-columns:max-content 1fr;gap:6px 18px;margin:20px 0;padding:16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r)}
.meta dt{color:var(--muted)}.meta dd{margin:0;font-weight:500}

/* prose */
.prose{max-width:68ch;padding:44px 0 0}
.prose h2{margin-top:1.6em}.prose ul{padding-left:1.2em}
.note{border-left:4px solid var(--warn);background:var(--surface);padding:12px 16px;border-radius:0 var(--r) var(--r) 0;margin:1.2em 0}

/* reader */
.reader-bar{position:sticky;top:62px;z-index:10;background:var(--surface);border-bottom:1px solid var(--line)}
.reader-bar .wrap{display:flex;align-items:center;gap:8px;flex-wrap:wrap;min-height:52px;padding-top:6px;padding-bottom:6px}
.reader-bar .title{font:600 .95rem var(--serif);margin-right:auto;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:40%}
.progress{height:3px;background:var(--line)}.progress i{display:block;height:100%;width:0;background:var(--accent)}
.page{max-width:66ch;margin:0 auto;padding:40px 20px 24px;font-family:var(--serif);font-size:var(--fs,19px);line-height:1.8}
.page.sans{font-family:var(--sans);line-height:1.7}
.page h1{font-size:2rem;text-align:center;margin-bottom:.2em}
.page .by{text-align:center;color:var(--muted);margin-bottom:2em;font-family:var(--sans);font-size:.95rem}
.page p{text-indent:1.4em;margin:0 0 .9em}
.page p.first{text-indent:0}
.page p.first::first-letter{font:700 3.2em/.85 var(--serif);float:left;padding:6px 8px 0 0;color:var(--accent)}
.endcard{max-width:66ch;margin:0 auto 48px;padding:0 20px}
.endcard>div{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px}

/* footer */
.site-footer{margin-top:72px;border-top:1px solid var(--line);padding:32px 0 40px;background:var(--surface)}
.fgrid{display:flex;flex-wrap:wrap;gap:28px 56px;justify-content:space-between}
.fgrid ul{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.fgrid a{text-decoration:none;color:var(--muted)}.fgrid a:hover{color:var(--accent)}
.toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:9px;font-weight:500;z-index:50}

@media print{
.site-header,.site-footer,.reader-bar,.progress,.endcard,.toast,.skip{display:none!important}
body{background:#fff;color:#000}.page{max-width:none;padding:0;font-size:12pt}}

/* ---- additions for the PHP version ---- */
.tools{grid-template-columns:1fr 180px 160px auto}
@media(max-width:760px){.tools{grid-template-columns:1fr 1fr}.tools input[type=search]{grid-column:1/-1}}
@media(max-width:480px){.tools{grid-template-columns:1fr}}
.cover-img{display:block;width:100%;height:auto;aspect-ratio:2/3;object-fit:cover;border-radius:4px 8px 8px 4px;box-shadow:0 8px 20px -10px rgba(0,0,0,.5);background:var(--line)}
.cover-img.lg{max-width:260px}
.pager{display:flex;flex-wrap:wrap;gap:6px;align-items:center;justify-content:center;margin:36px 0 0}
.pager a,.pager .cur{min-width:40px;padding:8px 12px;text-align:center;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);text-decoration:none;font-weight:500}
.pager a:hover{border-color:var(--accent);color:var(--accent)}
.pager .cur{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.pager .gap{color:var(--muted)}
.flash{padding:12px 16px;border-radius:var(--r);margin:0 0 16px;border:1px solid var(--line);background:var(--surface)}
.flash.ok{border-color:#2e8b57;background:color-mix(in srgb,#2e8b57 12%,var(--surface))}
.flash.err{border-color:#c0392b;background:color-mix(in srgb,#c0392b 12%,var(--surface))}
.toc{margin:0 0 2em;font-family:var(--sans);font-size:.95rem;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);padding:10px 16px}
.toc summary{cursor:pointer;font-weight:600}
.toc ol{margin:10px 0 4px;padding-left:1.3em;columns:2;column-gap:28px}
@media(max-width:560px){.toc ol{columns:1}}
.toc a[aria-current]{font-weight:700}
.page .chtitle{font-size:1.5rem;text-align:center;margin:1.4em 0 1em}
.chnav{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:2.4em;font-family:var(--sans)}
@media print{.page .chapter+.chapter{break-before:page}.toc,.chnav{display:none!important}}