:root{
  --bg:#f6f8f8; --paper:#ffffff; --ink:#1c2528; --mute:#627177; --line:#dbe3e5; --accent:#0a5a6b; --accent-bg:#e2f0f2;
  --sans:"Noto Sans TC","PingFang TC","Microsoft JhengHei","Heiti TC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --serif:"Noto Serif TC","Songti TC","PMingLiU","Source Han Serif TC",serif;
}
@media (prefers-color-scheme:dark){:root{--bg:#12181a;--paper:#182023;--ink:#e3eaec;--mute:#93a3a8;--line:#2a373b;--accent:#6cc4d4;--accent-bg:#1c3238}}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:4.5rem}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 var(--sans);-webkit-text-size-adjust:100%}
a{color:var(--accent)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.skip{position:absolute;left:-999px}.skip:focus{left:1rem;top:1rem;background:var(--paper);padding:.5rem 1rem;z-index:9}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.top{display:flex;gap:1.5rem;align-items:baseline;flex-wrap:wrap;padding:.9rem clamp(1rem,4vw,2.5rem);border-bottom:1px solid var(--line);background:var(--paper);position:sticky;top:0;z-index:5}
.brand{font-weight:800;font-size:1.05rem;color:var(--ink);text-decoration:none;letter-spacing:.02em}
.top nav{display:flex;gap:1.1rem;flex-wrap:wrap;font-size:.92rem}
.top nav a{color:var(--mute);text-decoration:none}.top nav a:hover{color:var(--accent);text-decoration:underline}

/* index */
.index{padding:0 clamp(1rem,4vw,2.5rem) 4rem;max-width:1100px;margin:0 auto}
.index.narrow{max-width:760px}
.head{padding:clamp(2rem,6vw,4.5rem) 0 1.5rem}
.head h1{margin:0;font-size:clamp(2rem,6vw,3.4rem);line-height:1.1;font-weight:800;letter-spacing:-.01em}
.head p{margin:.6rem 0 0;color:var(--mute)}
.layout{display:grid;grid-template-columns:230px 1fr;gap:3rem;align-items:start}
.side{position:sticky;top:4.2rem;max-height:calc(100vh - 5rem);overflow:auto;padding-bottom:1rem}
.search input{width:100%;padding:.6rem .8rem;border:1px solid var(--line);border-radius:6px;background:var(--paper);color:var(--ink);font:inherit}
.chips{display:flex;flex-wrap:wrap;gap:.4rem;margin:1rem 0}
.chip{font:inherit;font-size:.85rem;padding:.2rem .65rem;border:1px solid var(--line);background:var(--paper);color:var(--ink);border-radius:99px;cursor:pointer}
.chip small{margin-left:.35em;color:var(--mute)}
.chip.on{background:var(--accent);border-color:var(--accent);color:#fff}.chip.on small{color:#fff;opacity:.85}
.rail{display:flex;flex-direction:column;gap:.1rem;border-left:2px solid var(--line)}
.rail a{display:flex;justify-content:space-between;padding:.1rem .8rem;text-decoration:none;color:var(--mute);font-variant-numeric:tabular-nums;font-size:.92rem}
.rail a:hover{color:var(--accent);background:var(--accent-bg)}
.rail small{opacity:.8}
.count{margin:0 0 .5rem;color:var(--mute);font-size:.9rem}
.year{margin-bottom:2.5rem}
.year h2{margin:0;font-size:clamp(3rem,9vw,5.5rem);line-height:1;font-weight:200;letter-spacing:-.03em;color:var(--accent);font-variant-numeric:tabular-nums;border-bottom:1px solid var(--line);padding-bottom:.4rem}
.rows{list-style:none;margin:0;padding:0}
.rows li{display:grid;grid-template-columns:3.6rem 1fr;gap:0 1rem;padding:.65rem 0;border-bottom:1px solid var(--line)}
.rows li[hidden],.year[hidden]{display:none}
.rows time{grid-row:1/3;color:var(--mute);font-size:.88rem;font-variant-numeric:tabular-nums;padding-top:.15rem}
.rows .t{color:var(--ink);text-decoration:none;font-weight:600;line-height:1.5}
.rows .t:hover{color:var(--accent);text-decoration:underline}
.cats{display:flex;gap:.6rem;flex-wrap:wrap}
.cat{font-size:.8rem;color:var(--mute);text-decoration:none}.cat:hover{color:var(--accent);text-decoration:underline}
.none{color:var(--mute);padding:2rem 0}

/* post */
.post{max-width:42rem;margin:0 auto;padding:clamp(1.5rem,5vw,3.5rem) clamp(1rem,4vw,1.5rem) 4rem}
.post h1{font-size:clamp(1.7rem,5vw,2.4rem);line-height:1.3;margin:.3rem 0 1.5rem;font-weight:800}
.meta{display:flex;gap:1rem;flex-wrap:wrap;align-items:baseline;margin:0;color:var(--mute);font-size:.9rem}
.meta time{font-variant-numeric:tabular-nums}
.prose{font-size:1.06rem;line-height:1.95;overflow-wrap:anywhere}
.prose p{margin:0 0 1.2em}
.prose img,.prose iframe,.prose video{max-width:100%;height:auto}
.prose img{border-radius:3px}
.prose figure{margin:1.5em 0}.prose figcaption{font-size:.88rem;color:var(--mute);margin-top:.4em}
.prose blockquote{margin:1.4em 0;padding:.1em 1.2em;border-left:3px solid var(--accent);color:var(--mute);background:var(--accent-bg);border-radius:0 4px 4px 0}
.prose h2,.prose h3,.prose h4{line-height:1.4;margin:1.8em 0 .6em}
.prose pre{background:var(--paper);border:1px solid var(--line);padding:1rem;overflow:auto;font-size:.88rem;line-height:1.55}
.prose code{font-size:.9em}
.prose table{border-collapse:collapse;display:block;overflow-x:auto;max-width:100%}
.prose td,.prose th{border:1px solid var(--line);padding:.3rem .6rem}
.video{position:relative;aspect-ratio:16/9;margin:1.5em 0}.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.5rem;margin:1.5em 0}
.gallery img{width:100%;aspect-ratio:1;object-fit:cover}
.tags{color:var(--mute);font-size:.9rem}
.comments{margin-top:3rem;border-top:1px solid var(--line);padding-top:1.5rem}
.comments h2{font-size:1.1rem;margin:0 0 1rem}.comments h2 span{color:var(--mute);font-weight:400}
.comment{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:.8rem 1rem;margin-bottom:.8rem;font-size:.95rem;overflow-wrap:anywhere}
.comment header{display:flex;gap:.8rem;align-items:baseline;margin-bottom:.3rem}
.comment time{color:var(--mute);font-size:.82rem}.comment p{margin:0 0 .6em}
.pn{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:3rem}
.pn a{display:block;padding:.8rem 1rem;border:1px solid var(--line);border-radius:6px;background:var(--paper);color:var(--ink);text-decoration:none;font-weight:600;line-height:1.45}
.pn a:hover{border-color:var(--accent)}.pn small{display:block;color:var(--mute);font-weight:400;font-size:.8rem}
.pn .next{text-align:right}
.orig{margin-top:2rem;font-size:.85rem;color:var(--mute)}

@media (max-width:800px){
  .layout{grid-template-columns:1fr;gap:1rem}
  .side{position:static;max-height:none}
  .rail{flex-direction:row;overflow-x:auto;border-left:0;border-bottom:2px solid var(--line)}
  .rail a{flex:none;gap:.4rem}
  .pn{grid-template-columns:1fr}
}
.stub{color:var(--mute);border-top:1px solid var(--line);padding-top:1rem;font-size:.95rem}
.rows .plain{color:var(--ink);font-weight:500;line-height:1.5}

.top nav .about{margin-left:auto}
.top nav{flex:1}
.search{display:block;margin-bottom:1rem}
body{min-height:100vh;display:flex;flex-direction:column}
body>main{flex:1;width:100%}
.foot{padding:1.5rem clamp(1rem,4vw,2.5rem);border-top:1px solid var(--line);color:var(--mute);font-size:.85rem;text-align:center;background:var(--paper)}

/* mobile header */
.menu{display:none}
@media (max-width:700px){
  html{scroll-padding-top:3.5rem}
  .top{padding:.5rem 1rem;gap:0;align-items:center;justify-content:space-between}
  .brand{font-size:1rem}
  .js .menu{display:inline-flex;align-items:center;gap:.4rem;min-height:2.25rem;padding:0 .8rem;font:inherit;font-size:.9rem;color:var(--ink);background:none;border:1px solid var(--line);border-radius:6px;cursor:pointer}
  .js .menu::after{content:"";width:.45em;height:.45em;border:solid currentColor;border-width:0 2px 2px 0;transform:translateY(-.1em) rotate(45deg);transition:transform .15s}
  .js .top.open .menu::after{transform:translateY(.1em) rotate(-135deg)}
  .js .top nav{display:none;flex:0 0 100%;flex-direction:column;gap:0;margin-top:.5rem;border-top:1px solid var(--line)}
  .js .top.open nav{display:flex}
  .js .top nav a{padding:.8rem .25rem;font-size:1rem;border-bottom:1px solid var(--line)}
  .js .top nav .about{margin-left:0}
  .head{padding-top:1.5rem}
}
@media (prefers-reduced-motion:reduce){.js .menu::after{transition:none}}