/* altimn — Notes & article pages. Mirrors the homepage warm-paper visual system.
   (Tokens are duplicated from default.php for now; DRY later if we extract a shared core.) */
:root{
  --paper:#ead9bf; --paper-2:#d9c7a8; --ink:#1a1a1a;
  --soft:oklch(0.34 0.012 55); --dim:oklch(0.52 0.018 55); --line:oklch(0.72 0.022 60);
  --accent:#a48a41;
  --serif:'Fraunces',Georgia,serif; --sans:'Inter',system-ui,sans-serif; --mono:'JetBrains Mono',monospace;
  --pad:clamp(40px,8vw,110px); --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;height:auto;display:block;}

/* ── header ── */
.nb-head{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;
  padding:18px clamp(20px,5vw,60px);background:color-mix(in oklab,var(--paper) 88%,transparent);
  backdrop-filter:blur(8px);border-bottom:1px solid color-mix(in oklab,var(--ink) 8%,transparent);}
.nb-brand{font-family:var(--serif);font-weight:600;font-size:1.3rem;letter-spacing:-.01em;}
.nb-nav{display:flex;align-items:center;gap:22px;font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;}
.nb-nav a{color:var(--soft);transition:color .3s;}
.nb-nav a:hover{color:var(--ink);}
.nb-lang a{color:var(--soft);}
.nb-lang a.on{color:var(--accent);}
.nb-lang span{opacity:.4;margin:0 4px;}

/* ── single article ── */
.nb-article{max-width:1040px;margin:0 auto;padding:clamp(30px,6vw,72px) clamp(20px,5vw,48px) clamp(40px,7vh,80px);}
/* matches .nb-back (bottom link): mono .7rem, accent colour */
.nb-toplink{display:inline-block;margin:0 0 44px;font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);transition:color .25s;}
/* linked author byline → homepage About */
.nb-meta .nb-author{color:var(--accent);border-bottom:1px solid color-mix(in oklab,var(--accent) 40%,transparent);transition:border-color .3s;}
.nb-meta .nb-author:hover{border-bottom-color:var(--accent);}
.nb-cat{font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:0 0 18px;}
.nb-title{font-family:var(--serif);font-weight:500;font-size:clamp(1.9rem,4.4vw,3rem);line-height:1.12;letter-spacing:-.02em;margin:0 0 7px;font-variation-settings:'opsz' 80;}
/* Chinese title reads thin at weight 500 (Fraunces has no CJK glyphs → system fallback), so bold it — mirrors the homepage's bold ZH headings */
html[lang="zh-Hant"] .nb-title{font-family:var(--sans);font-weight:700;letter-spacing:0;}
.nb-sub{font-family:var(--serif);font-weight:400;font-style:normal;font-size:clamp(1.15rem,2vw,1.5rem);line-height:1.4;color:color-mix(in oklab,var(--soft) 75%,transparent);margin:0 0 22px;font-variation-settings:'opsz' 28;}
/* ZH subtitle mirrors the ZH title → sans (黑體), normal weight */
html[lang="zh-Hant"] .nb-sub{font-family:var(--sans);font-weight:400;letter-spacing:0;}
.nb-meta{font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;color:var(--dim);margin:0 0 30px;}
/* category now lives inline at the front of the meta row — keep it as an accent label */
.nb-meta-cat{color:var(--accent);text-transform:uppercase;letter-spacing:.14em;}
/* syndication attribution line (shown on republished pieces, e.g. ZH → twb2bweb) */
.nb-source{font-family:var(--mono);font-size:.66rem;letter-spacing:.05em;color:var(--dim);margin:-14px 0 30px;}
.nb-source a{color:var(--accent);border-bottom:1px solid color-mix(in oklab,var(--accent) 40%,transparent);transition:border-color .3s;}
.nb-source a:hover{border-bottom-color:var(--accent);}
/* inline "Related / 延伸閱讀" link inside article body */
.nb-related{font-family:var(--mono);font-size:.72rem;letter-spacing:.03em;color:var(--dim);margin-top:2.4em;}
.nb-related a{color:var(--accent);border-bottom:1px solid color-mix(in oklab,var(--accent) 40%,transparent);}
.nb-related a:hover{border-bottom-color:var(--accent);}
.nb-cover{margin:0 0 clamp(28px,4vw,44px);border-radius:10px;overflow:hidden;}
.nb-cover img{width:100%;mix-blend-mode:multiply;}

/* body typography */
.nb-body{font-size:clamp(1.08rem,1.5vw,1.2rem);line-height:1.6;color:#26211a;}
.nb-body > *{margin:0 0 1.15em;}
.nb-body > *:last-child{margin-bottom:0;}
.nb-body h2{font-family:var(--serif);font-weight:600;font-size:clamp(1.5rem,2.6vw,2rem);line-height:1.2;letter-spacing:-.01em;margin:3em 0 .75em;}
.nb-body h3{font-family:var(--serif);font-weight:600;font-size:clamp(1.2rem,2vw,1.45rem);margin:2.4em 0 .6em;}
.nb-body a{color:var(--accent);border-bottom:1px solid color-mix(in oklab,var(--accent) 40%,transparent);transition:border-color .3s;}
.nb-body a:hover{border-bottom-color:var(--accent);}
.nb-body blockquote{margin:2.4em 0;padding:.3em 0 .3em 1.2em;border-left:2px solid var(--accent);font-family:var(--serif);font-style:italic;font-size:1.15em;color:var(--soft);}
.nb-body ul,.nb-body ol{padding-left:1.3em;}
.nb-body li{margin:.55em 0;}
.nb-body img{border-radius:8px;margin:1.6em auto;mix-blend-mode:multiply;}
/* Non-white images (photos / colour / dark backgrounds) blend badly with multiply.
   Tag such a figure (or img) with class="solid" → no blend + a clean shadow frame instead. */
.nb-body figure.solid img, .nb-body img.solid{mix-blend-mode:normal;box-shadow:0 10px 26px rgba(26,18,6,.14);}
.nb-cover.solid img{mix-blend-mode:normal;}
.nb-body figure{margin:3.2em auto;}
.nb-body figure img{margin:0 auto;}
.nb-body figcaption{font-family:var(--mono);font-size:.7rem;letter-spacing:.05em;color:var(--dim);text-align:center;margin-top:12px;line-height:1.5;}
.nb-body code{font-family:var(--mono);font-size:.88em;background:color-mix(in oklab,var(--ink) 8%,transparent);padding:.15em .4em;border-radius:4px;}
.nb-body pre{background:color-mix(in oklab,var(--ink) 5%,var(--paper));color:#2b2620;padding:15px 18px;border-left:2px solid var(--accent);border-radius:0 6px 6px 0;font-family:var(--mono);font-size:.8em;line-height:1.7;white-space:pre-wrap;word-break:break-word;margin:2.2em 0;}
.nb-body pre code{background:none;padding:0;}
.nb-body hr{border:none;border-top:1px solid var(--line);margin:3.4em 0;}
.nb-back{display:inline-block;margin-top:48px;font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);}

/* share row — Medium-style: thin rule top & bottom, buttons pushed right */
.nb-share{display:flex;align-items:center;justify-content:flex-end;flex-wrap:wrap;gap:14px;margin:34px 0 50px;padding:13px 0;border-top:1px solid color-mix(in oklab,var(--line) 50%,transparent);border-bottom:1px solid color-mix(in oklab,var(--line) 50%,transparent);font-family:var(--mono);font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;}
.nb-share-lbl{color:var(--dim);}
.nb-share-btn{display:inline-block;color:var(--accent);background:transparent;border:1px solid color-mix(in oklab,var(--accent) 35%,transparent);border-radius:2px;padding:5px 11px;font:inherit;letter-spacing:inherit;text-transform:inherit;cursor:pointer;transition:background .25s,color .25s,border-color .25s;}
.nb-share-btn:hover{background:var(--accent);color:var(--paper);border-color:var(--accent);}
.nb-share-btn.is-copied{background:var(--accent);color:var(--paper);border-color:var(--accent);}
/* bottom instance sits just before the back link */
.nb-share--end{margin:44px 0 0;}
.nb-share--end + .nb-back{margin-top:26px;}

/* ── listing / index ── */
.nb-index{max-width:1200px;margin:0 auto;padding:clamp(30px,6vw,72px) clamp(20px,5vw,40px) clamp(60px,10vh,120px);}
/* title block sits on a soft gold field (like the homepage's 10–16% gold tint) — refined "section bg".
   ▸ 想要更飽和(實金底黑字)：把 background 換成 var(--accent) 即可。 */
.nb-index-head{background:color-mix(in oklab,var(--accent) 15%,var(--paper));border-radius:12px;padding:clamp(30px,4.5vw,56px) clamp(24px,4vw,48px);margin-bottom:clamp(34px,5vw,56px);}
.nb-index-eyebrow{font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin:0 0 clamp(16px,2.2vw,22px);}
.nb-index-head .nb-index-sub{margin-bottom:0;}
.nb-index-h1{font-family:var(--serif);font-weight:500;font-size:clamp(2.1rem,5.2vw,3.4rem);line-height:1.05;margin:0 0 clamp(14px,1.6vw,20px);letter-spacing:-.022em;font-variation-settings:'opsz' 72;}
html[lang="zh-Hant"] .nb-index-h1{font-family:var(--sans);font-weight:700;letter-spacing:-.01em;}
.nb-index-sub{color:var(--soft);margin:0 0 clamp(34px,5.5vw,60px);max-width:52ch;font-size:1.02rem;}
.nb-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:clamp(28px,3.6vw,48px);}
/* card = full-bleed cover + black gradient overlay, text floats on the image (matches homepage carousel .ncard) */
.nb-item{position:relative;display:block;border-radius:10px;overflow:hidden;background:#1a1a1a;color:#fff;transition:transform .4s ease;}
.nb-item:hover{transform:translateY(-4px);}
.nb-item-media{position:relative;aspect-ratio:1/1;overflow:hidden;background:var(--paper-2);}
/* warm the (often white-background) cover art so cards don't read as stark white —
   gold multiply tint ties them to the paper+gold palette; dial the opacity to taste */
.nb-item-media::after{content:"";position:absolute;inset:0;background:var(--accent);mix-blend-mode:multiply;opacity:.16;pointer-events:none;}
.nb-item-media img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s ease;}
.nb-item:hover .nb-item-media img{transform:scale(1.04);}
.nb-item-cap{position:absolute;inset:auto 0 0 0;padding:clamp(34px,4vw,52px) clamp(18px,2vw,24px) clamp(16px,1.8vw,22px);background:linear-gradient(to top, rgba(8,6,3,.92) 0%, rgba(8,6,3,.92) 60%, rgba(8,6,3,0) 100%);}
.nb-item-cat{font-family:var(--mono);font-size:.58rem;letter-spacing:.14em;text-transform:uppercase;color:#e7c66a;margin:0 0 8px;}
.nb-item-title{font-family:var(--serif);font-weight:500;font-size:clamp(1.08rem,1.5vw,1.36rem);line-height:1.24;color:#fff;margin:0;font-variation-settings:'opsz' 32;}
/* ZH card title: serif has no CJK glyphs → falls back to 明體; force 黑體 to match .nb-title + homepage cards */
html[lang="zh-Hant"] .nb-item-title{font-family:var(--sans);font-weight:700;letter-spacing:0;}
.nb-item-foot{display:flex;justify-content:space-between;align-items:baseline;gap:14px;margin-top:14px;}
.nb-item-date{font-family:var(--mono);font-size:.58rem;letter-spacing:.06em;color:rgba(255,255,255,.6);}
.nb-item-read{font-family:var(--mono);font-size:.58rem;letter-spacing:.08em;text-transform:uppercase;color:#e7c66a;opacity:0;transition:opacity .3s;white-space:nowrap;}
.nb-item:hover .nb-item-read{opacity:1;}

/* ── pagination ── */
.nb-pager{display:flex;justify-content:center;align-items:center;gap:6px;margin-top:clamp(44px,6vw,72px);font-family:var(--mono);font-size:.82rem;}
.nb-pager-num,.nb-pager-arrow{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:0 8px;border-radius:9px;color:var(--soft);transition:background .25s,color .25s;}
.nb-pager-num:hover,.nb-pager-arrow:hover{background:color-mix(in oklab,var(--accent) 16%,transparent);color:var(--ink);}
.nb-pager-num.is-current{background:var(--accent);color:#222831;font-weight:500;}
.nb-pager-arrow.is-off{opacity:.28;pointer-events:none;}

/* ── footer ── */
.nb-foot{border-top:1px solid var(--line);padding:40px clamp(20px,5vw,60px);font-family:var(--mono);font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;}

/* mobile-only line break (hidden on desktop) */
.br-m{display:none;}

@media(max-width:600px){
  .nb-nav{gap:14px;}
  /* listing headline: bigger + broken onto two lines on phones */
  .br-m{display:inline;}
  .nb-index-h1{font-size:clamp(2.5rem,10.5vw,3.2rem);line-height:1.1;}
}