/* Field notes — calm reading layer on top of style.css */
.fog--soft { opacity: .6; -webkit-mask-image: linear-gradient(#000 0, #000 30%, transparent 75%); mask-image: linear-gradient(#000 0, #000 30%, transparent 75%); }
.nav__links a[aria-current="page"]::after { transform: scaleX(1); background: var(--signal); }

/* index */
.blog-index { padding: clamp(130px, 22vh, 220px) var(--gutter) 80px; max-width: 1400px; }
.blog-index__title { margin: 0; font: 300 clamp(72px, 15vw, 240px)/.85 var(--display); letter-spacing: -.045em; font-variation-settings: "opsz" 144; }
.blog-index__title em { color: var(--signal); }
.blog-index__lede { font: 400 clamp(20px, 1.8vw, 26px)/1.4 var(--display); max-width: 34ch; margin: 32px 0 0; }
.blog-index .eyebrow a { color: var(--signal); }
.year { margin-top: clamp(64px, 10vh, 120px); padding: 0; }
.year__label { color: var(--graphite); margin: 0 0 8px; font-weight: 400; }
.year .notes__list { margin-top: 0; }
.draft { color: var(--signal); text-transform: uppercase; letter-spacing: .1em; }
.empty { color: var(--graphite); margin-top: 64px; }

/* post */
.post { position: relative; z-index: 1; padding: clamp(120px, 18vh, 180px) var(--gutter) 40px; }
.post__head { max-width: 980px; margin: 0 auto 64px; }
.back { text-decoration: none; color: var(--graphite); }
.back:hover { color: var(--signal); }
.post__meta { display: flex; gap: 16px; color: var(--graphite); margin: 40px 0 18px; }
.post__title { margin: 0; font: 350 clamp(44px, 6.4vw, 96px)/1 var(--display); letter-spacing: -.03em; font-variation-settings: "opsz" 144; text-wrap: balance; }
.post__sum { font: italic 400 clamp(20px, 1.8vw, 25px)/1.4 "Newsreader", var(--display); color: var(--graphite); margin: 24px 0 0; max-width: 46ch; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 24px 0 0; }
.tags li { padding: 3px 10px; border: 1px solid var(--rule); border-radius: 99px; }

.prose { max-width: 680px; margin: 0 auto; font: 400 20px/1.7 "Newsreader", Georgia, serif; font-variation-settings: "opsz" 18; }
.prose > * + * { margin-top: 1.1em; }
.prose p, .prose ul, .prose ol, .prose blockquote, .prose pre, .prose table, .prose figure { margin-bottom: 0; }
.prose h2, .prose h3 { font-family: var(--display); font-weight: 400; letter-spacing: -.015em; line-height: 1.15; position: relative; margin: 2.2em 0 0; }
.prose h2 { font-size: 34px; }
.prose h3 { font-size: 25px; }
.prose .anchor { position: absolute; left: -1.1em; color: var(--rule); text-decoration: none; opacity: 0; transition: opacity .2s; }
.prose h2:hover .anchor, .prose h3:hover .anchor { opacity: 1; color: var(--signal); }
.prose a { text-decoration-color: var(--signal); text-underline-offset: 3px; }
.prose a:hover { color: var(--signal); }
.prose strong { font-weight: 500; }
.prose blockquote { margin-left: 0; padding-left: 24px; border-left: 2px solid var(--signal); font-style: italic; color: var(--graphite); }
.prose code { font: 15px/1.5 var(--mono); background: var(--paper-2); padding: .1em .35em; border-radius: 4px; }
.prose pre { border: 1px solid var(--rule); border-radius: 10px; padding: 18px 20px; overflow-x: auto; }
.prose pre code { background: none; padding: 0; font-size: 14px; }
.prose pre code.hljs { background: none; padding: 0; }
.prose img { border-radius: 10px; margin: 0 auto; }
.prose hr { border: 0; text-align: center; margin: 2.6em 0; }
.prose hr::before { content: "· · ·"; color: var(--signal); letter-spacing: .6em; }
.prose table { border-collapse: collapse; width: 100%; font: 15px/1.5 var(--text); }
.prose th, .prose td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--rule); }
.prose .katex-display { overflow-x: auto; overflow-y: hidden; padding: 4px 0; }
.prose li + li { margin-top: .35em; }

.post__nav { max-width: 980px; margin: 96px auto 0; display: grid; grid-template-columns: 1fr 1fr; gap: 24px; border-top: 1px solid var(--rule); padding-top: 28px; }
.post__nav a { text-decoration: none; font: 350 24px/1.2 var(--display); display: grid; gap: 8px; }
.post__nav a:hover { color: var(--signal); }
.post__nav .mono { color: var(--graphite); }
.post__nav .next { text-align: right; }

.post-foot { position: relative; z-index: 1; padding: 64px var(--gutter) 40px; color: var(--graphite); }
.post-foot a { color: var(--fg); text-decoration-color: var(--signal); }

@media (max-width: 860px) {
  .prose { font-size: 18.5px; }
  .prose .katex-display { font-size: .92em; }
  .prose .anchor { display: none; }
  .post__nav { grid-template-columns: 1fr; }
  .post__nav .next { text-align: left; }
}

/* reading progress */
.progress { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 120; background: var(--signal); transform: scaleX(0); transform-origin: left; }

/* contents sidebar (wide screens) */
.post__body { position: relative; max-width: 1180px; margin: 0 auto; }
.toc { position: absolute; left: 0; top: 0; bottom: 0; width: 200px; }
.toc > * { position: sticky; }
.toc p { top: 110px; margin: 0 0 10px; color: var(--graphite); text-transform: uppercase; letter-spacing: .12em; font-size: 10.5px; }
.toc ol { top: 136px; list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--rule); }
.toc a { display: block; padding: 6px 0 6px 14px; margin-left: -1px; border-left: 2px solid transparent; text-decoration: none; color: var(--graphite); font-size: 14px; line-height: 1.35; transition: color .3s, border-color .3s; }
.toc .toc__d3 a { padding-left: 26px; font-size: 13px; }
.toc a:hover { color: var(--fg); }
.toc a[aria-current] { color: var(--fg); border-left-color: var(--signal); }
@media (max-width: 1180px) { .toc { display: none; } }

/* code blocks: language label + copy */
.prose pre { position: relative; background: var(--paper-2); }
.prose pre[data-lang]::before { content: attr(data-lang); position: absolute; top: 10px; right: 76px; font: 11px/1 var(--mono); color: var(--graphite); text-transform: lowercase; }
.copy { position: absolute; top: 6px; right: 6px; padding: 4px 10px; border: 1px solid var(--rule); border-radius: 99px; background: var(--paper); color: var(--fg); cursor: pointer; font-size: 11px; opacity: .6; transition: opacity .2s; }
.prose pre:hover .copy, .copy:focus-visible { opacity: 1; }