:root{--ink:#1d1b19;--mut:#6b6760;--line:#ececec;--bg:#fff;--soft:#f6f5f2;--blue:#1a56b0}
*{box-sizing:border-box}body{margin:0;font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--bg)}
a{color:inherit;text-decoration:none}.wrap{max-width:1040px;margin:0 auto;padding:0 18px}
header{position:sticky;top:0;background:#fffffff2;backdrop-filter:blur(6px);border-bottom:1px solid var(--line);z-index:5}
.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-top:9px;padding-bottom:9px}
.logo{font-weight:600}nav{display:flex;gap:16px;align-items:center;font-size:14px;color:var(--mut);flex-wrap:wrap}nav a:hover{color:var(--ink)}
.tg{background:#229ed9;color:#fff;border-radius:16px;padding:4px 12px;font-size:13px}
.lang{display:flex;border:1px solid #dcdcdc;border-radius:6px;overflow:hidden;font-size:12px}.lang a{padding:3px 8px}.lang a.on{background:var(--ink);color:#fff}
#announce{margin:14px 0 4px;background:#eef5ff;border:1px solid #b9d3f5;border-radius:10px;padding:8px 10px 8px 14px;display:flex;align-items:center;gap:12px;color:#0c3b80;font-size:14px}
#announce b{font-weight:600}#announce span.t{flex:1;min-width:0}#announce .go{background:var(--blue);color:#fff;border-radius:7px;padding:5px 12px;font-size:13px;white-space:nowrap}
#announce button{border:0;background:none;font-size:20px;line-height:1;color:#2c5ca3;cursor:pointer}
.hero{display:flex;gap:14px;align-items:center;padding:14px 0 6px}.ph{width:56px;height:56px;border-radius:50%;background:#f1eee8;flex-shrink:0;object-fit:cover}
h1{margin:0;font-size:22px;font-weight:600;line-height:1.2}.tag{color:var(--mut);font-size:14px}
.tools{display:flex;gap:8px;flex-wrap:wrap;align-items:center;padding:8px 0}
#q{flex:1;min-width:200px;border:0;background:var(--soft);border-radius:8px;padding:9px 12px;font:inherit}
.chips{display:flex;gap:6px;flex-wrap:wrap;padding-bottom:6px}.chip{border:1px solid #dcdcdc;background:#fff;border-radius:14px;padding:3px 12px;font-size:13px;cursor:pointer}.chip.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.sec{border-top:1px solid var(--line);padding-top:12px;margin-top:10px}.sh{display:flex;justify-content:space-between;align-items:baseline}.sh h2{font-size:15px;font-weight:600;margin:0}.sh small{color:var(--mut);font-weight:400}.sh button{border:0;background:none;color:var(--blue);cursor:pointer;font-size:13px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(84px,1fr));gap:12px;padding:8px 0 12px}
.cv{aspect-ratio:2/3;border-radius:4px;color:#fff;font-size:11px;display:flex;align-items:center;justify-content:center;text-align:center;padding:6px;line-height:1.25;overflow:hidden}.cv img{width:100%;height:100%;object-fit:cover}
.nm{font-size:12px;margin-top:4px;line-height:1.25}.bk{min-width:0}.ln{display:flex;gap:10px;margin-top:4px}.ln a{border:1px solid #d9d6cf;border-radius:6px;padding:2px 6px;color:var(--mut);display:flex;line-height:0}.ln a svg{width:16px;height:16px}.ln a[aria-label=Amazon]{color:#c77700}.ln a[aria-label='Google Books']{color:#1a7f5a}.ln a:hover{background:var(--soft)}.ln a:hover{border-color:var(--ink);color:var(--ink)}
.list .grid{grid-template-columns:1fr;gap:0}.list .bk{display:flex;gap:10px;align-items:center;border-bottom:1px solid var(--line);padding:6px 0}.list .cv{width:30px;aspect-ratio:2/3;font-size:0;padding:0;flex-shrink:0}.list .nm{flex:1;margin:0;font-size:14px}.list .ln{margin:0}
.hide{display:none!important}#about{padding:18px 0;border-top:1px solid var(--line);margin-top:10px}#about h2{font-size:16px;margin:0 0 6px}#about p{margin:0;color:var(--mut);max-width:70ch}
footer{border-top:1px solid var(--line);padding:14px 0 28px;font-size:13px;color:var(--mut)}footer .wrap{display:flex;gap:6px 16px;flex-wrap:wrap;justify-content:space-between}footer a:hover{color:var(--ink)}
@media(max-width:560px){nav{gap:10px}.grid{grid-template-columns:repeat(auto-fill,minmax(72px,1fr))}}

button{font:inherit;color:inherit;-webkit-appearance:none;appearance:none;margin:0}
.chip{display:inline-flex;align-items:center;justify-content:center;line-height:1.4;color:var(--ink);background:#fff;border:1px solid #d6d3cc}
.chip.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.vt{display:flex;border:1px solid #d6d3cc;border-radius:8px;overflow:hidden}.vt button{border:0;background:#fff;color:var(--mut);padding:7px 10px;cursor:pointer;display:flex}.vt button.on{background:var(--soft);color:var(--ink)}.vt svg{width:18px;height:18px}
#q{-webkit-appearance:none;appearance:none;color:var(--ink);outline:0}#q:focus{box-shadow:0 0 0 2px #b9d3f5}
#count{color:var(--mut);font-size:13px;min-width:22px;text-align:right}
.cv{position:relative}.cv img{position:absolute;inset:0}
.ln a img{display:block;width:18px;height:18px}.ph{display:flex;align-items:center;justify-content:center;font-weight:600;color:#8a857b;font-size:15px}
.hero .ph{width:64px;height:64px;object-position:55% 40%}
.ahero{display:flex;gap:18px;align-items:center;padding:22px 0 8px}.ahero .ph{width:120px;height:120px;border-radius:50%;object-fit:cover;object-position:55% 40%}.ahero h1{margin:0 0 8px;font-size:26px}
.badges{display:flex;flex-wrap:wrap;gap:6px}.badges span{background:var(--soft);border:1px solid var(--line);border-radius:999px;padding:3px 10px;font-size:12.5px}
.about section{max-width:72ch;margin:20px 0}.about h2{font-size:17px;margin:0 0 6px}.about p{margin:0 0 8px;color:var(--mut);line-height:1.6}.back{margin:26px 0}
.cols{display:grid;grid-template-columns:1fr 1fr;column-gap:28px}.cols .it{display:flex;justify-content:space-between;gap:10px;align-items:baseline;border-bottom:1px solid var(--line);padding:6px 0;font-size:14px;min-width:0}.cols .it .nm{margin:0;font-size:14px}.cols .it .t{display:flex;gap:10px;flex-shrink:0;font-size:13px}.cols .it .t a{color:var(--ink);text-decoration:underline;text-underline-offset:2px}
@media(max-width:520px){.cols{column-gap:12px}.cols .it{flex-direction:column;gap:2px}.ahero{flex-direction:column;align-items:flex-start}}
/* v3 */
.grid{grid-template-columns:repeat(auto-fill,minmax(128px,1fr));gap:22px 16px;padding:12px 0 16px}
.cv{border-radius:3px;box-shadow:0 1px 2px rgba(0,0,0,.18),0 6px 14px rgba(0,0,0,.12);font-size:12px;padding:10px}
.bk .nm{font-size:13px;font-weight:500;margin-top:9px;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.bk .ln{margin-top:7px;gap:8px}
.cols .it:nth-child(odd){border-right:1px solid #d9d6cf;padding-right:18px}.cols .it:nth-child(even){padding-left:18px}.cols{column-gap:0}
.cols .it .nm{font-weight:500;color:var(--ink)}
.cols .it .t a{text-decoration:none;font-weight:600;border-radius:4px;padding:1px 7px}
.cols .it .t a[href*=amazon]{color:#9a5a00;background:#fff3df}.cols .it .t a[href*=google]{color:#14684a;background:#e4f4ec}
.cols .it .t a:hover{filter:brightness(.95);text-decoration:underline}
.none{color:var(--mut);padding:24px 0}
@media(max-width:520px){.cols .it:nth-child(odd){padding-right:10px}.cols .it:nth-child(even){padding-left:10px}.grid{grid-template-columns:repeat(auto-fill,minmax(104px,1fr));gap:18px 12px}}
.cform{max-width:560px;margin:18px 0;display:grid;gap:12px}.cform label{font-size:13px;color:var(--mut);display:grid;gap:4px}
.cform input,.cform textarea{font:inherit;border:1px solid #d9d6cf;border-radius:8px;padding:10px 12px;background:#fff;color:var(--ink)}.cform textarea{min-height:140px;resize:vertical}
.cform button{justify-self:start;background:var(--blue);color:#fff;border:0;border-radius:8px;padding:10px 22px;font:inherit;cursor:pointer}.cform button:disabled{opacity:.6}
.cform .hp{position:absolute;left:-9999px}.cmsg{padding:10px 12px;border-radius:8px;background:#e4f4ec;color:#14684a;display:none}.cmsg.err{background:#fde8e8;color:#a32020}
.cols .it{flex-wrap:wrap}.cols .it .nm{flex:1 1 130px;min-width:0}.cols .it .t{margin-left:auto}
@media(max-width:520px){.cols .it{flex-direction:column;align-items:flex-start;gap:4px}.cols .it .nm{flex:0 0 auto}.cols .it .t{margin-left:0;flex-wrap:wrap;gap:6px}.cols .it .t a{white-space:nowrap;font-size:12px;padding:1px 6px}}
/* book pages */
a.cv{display:block;text-decoration:none;color:#fff}.bk .nm a.bl,.cols .nm a.bl{color:inherit;text-decoration:none}.bk .nm a.bl:hover,.cols .nm a.bl:hover{text-decoration:underline}
.bk .cv:hover{transform:translateY(-2px);transition:transform .15s}
.bookpage .bp{display:grid;grid-template-columns:minmax(180px,260px) 1fr;gap:32px;margin:14px 0 24px;align-items:start}
.bookpage .cv{aspect-ratio:2/3;position:relative;overflow:hidden;border-radius:4px;box-shadow:0 2px 4px rgba(0,0,0,.2),0 12px 28px rgba(0,0,0,.18);font-size:15px;padding:16px;color:#fff}
.bookpage .cv img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.bookpage h1{font-size:26px;line-height:1.2;margin:4px 0 12px}.bookpage h2{font-size:16px;margin:22px 0 8px}
.bser{font-size:13px;color:var(--mut)}.bser a{color:inherit}
.meta{display:grid;grid-template-columns:auto 1fr;gap:4px 16px;font-size:14px;margin:0 0 16px}.meta dt{color:var(--mut)}.meta dd{margin:0}
.buy{display:flex;gap:10px;flex-wrap:wrap}.buy a{text-decoration:none;font-weight:600;border-radius:8px;padding:9px 18px;font-size:14px}
.buy a[href*=amazon]{color:#9a5a00;background:#fff3df}.buy a[href*=google]{color:#14684a;background:#e4f4ec}.buy a:hover{filter:brightness(.95)}
.bdesc{line-height:1.65;font-size:15px;max-width:68ch}
.bnav{display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);padding:14px 0;font-size:14px}.bnav a{color:var(--ink)}
@media(max-width:620px){.bookpage .bp{grid-template-columns:1fr;gap:18px}.bookpage .bpc{max-width:200px}}

.tg{display:inline-flex;align-items:center;gap:6px}.tg .tgi{flex:none}