/* ─────────────────────────────────────────────────────────
   野帳 field notebook · blog pages (index + post)
   same tokens as the home page draft
   ───────────────────────────────────────────────────────── */
:root {
  --paper:  #FBFAF6;
  --dot:    rgba(16, 86, 102, 0.16);
  --ink:    #0A3323;
  --text:   #23392f;
  --muted:  #55675d;
  --accent: #105666;
  --date:   #5a6e35;
  --moss:   #839958;
  --rosy:   #D3968C;
  --shu:    #c0473a;
  --line:   rgba(10, 51, 35, 0.13);
  --kraft:  #efe6d4;
  --wash:   rgba(10, 51, 35, 0.035);

  /* aliases so the existing figure SVGs keep their colours */
  --soft: var(--text); --midnight: var(--accent); --dark-green: var(--ink); --beige: var(--paper);

  --mono:  "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --serif: "Fraunces", Georgia, serif;
  --jp:    "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
}
[data-theme="dark"] {
  --paper:  #101a16;
  --dot:    rgba(184, 205, 161, 0.10);
  --ink:    #e4ece6;
  --text:   #c9d4cd;
  --muted:  #8fa198;
  --accent: #9ec5cc;
  --date:   #b8cda1;
  --shu:    #d9695a;
  --line:   rgba(255, 255, 255, 0.10);
  --kraft:  #1a2621;
  --wash:   rgba(255, 255, 255, 0.035);
}

* { box-sizing: border-box; }
html {
  background-color: var(--paper);
  background-image: radial-gradient(circle, var(--dot) 1px, transparent 1.3px);
  background-size: 22px 22px; background-position: -11px -11px;
  scroll-behavior: smooth;
}
body { margin: 0; color: var(--text); font-family: var(--mono); font-size: 16px; line-height: 1.75; -webkit-font-smoothing: antialiased; }
::selection { background: var(--moss); color: #fff; }
a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px;
    text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent); }
a:hover { color: var(--shu); text-decoration-color: currentColor; }

.spine { position: fixed; left: 1.6rem; top: 50%; transform: translateY(-50%); writing-mode: vertical-rl;
         font-family: var(--jp); font-size: 14px; letter-spacing: .5em; color: var(--muted); opacity: .75; user-select: none; }
.spine span { font-family: var(--mono); font-size: 11.5px; letter-spacing: .25em; margin-top: 1.2em; text-transform: uppercase; }
@media (max-width: 1400px) { .spine { display: none; } }

.page { position: relative; max-width: 680px; margin: 0 auto; padding: 2.2rem 1.5rem 5rem; }

/* notebook header strip */
.nb-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap;
           font-size: 12.5px; color: var(--muted); letter-spacing: .06em;
           padding-bottom: .5rem; border-bottom: 1px solid var(--line); margin-bottom: 4rem; }
.nb-head nav { display: flex; gap: 1.2rem; }
.nb-head nav a { text-decoration: none; color: var(--accent); }
.nb-head .field { display: inline-block; min-width: 3.2em; border-bottom: 1px dotted var(--muted);
                  text-align: center; color: var(--ink); margin-left: .5em; padding: 0 .3em; }
.theme-toggle { font: inherit; font-size: 12px; color: var(--muted); background: none; border: 0; cursor: pointer; padding: 0; }
.theme-toggle:hover { color: var(--shu); }

/* rubber-stamp tag */
.stamp { display: inline-block; font-size: 11.5px; line-height: 1; letter-spacing: .12em; text-transform: uppercase;
         color: var(--shu); border: 1.5px solid currentColor; border-radius: 3px; padding: .3em .5em .25em;
         transform: rotate(-2deg); opacity: .85; }

.foot { margin-top: 5rem; text-align: center; color: var(--muted); font-size: 13px; }
.foot pre { color: var(--moss); margin: 0 0 .5rem; opacity: .8; font-family: var(--mono); }
.foot .jp { font-family: var(--jp); letter-spacing: .3em; }
.dot { margin: 0 .5rem; opacity: .5; }

/* ═════════════ notes index: a notebook's 目次 (table of contents) ═════════════ */
.notes-hero { margin-bottom: 3.5rem; }
.notes-hero h1 { font-family: var(--serif); font-weight: 500; font-size: clamp(34px, 6vw, 44px); line-height: 1.1;
                 color: var(--ink); margin: 0 0 .6rem; display: flex; align-items: baseline; gap: 1rem; }
.notes-hero h1 .jp { font-family: var(--jp); font-size: .45em; letter-spacing: .35em; color: var(--muted); }
.notes-hero p { margin: 0; color: var(--muted); }
.sprout { float: right; width: 74px; height: 74px; margin: -8px 0 0 1rem; color: var(--moss); }

.year { display: flex; align-items: center; gap: .8rem; margin: 3rem 0 .4rem; font-size: 12.5px; font-weight: 600;
        letter-spacing: .16em; color: var(--date); }
.year::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.year:first-of-type { margin-top: 0; }

.toc { list-style: none; padding: 0; margin: 0; }
.toc li { border-bottom: 1px dashed var(--line); }
.toc a { display: block; padding: 1.4rem 0 1.3rem; text-decoration: none; color: inherit; }
.toc .meta { font-size: 13px; color: var(--muted); margin-bottom: .4rem; }
.toc .title-row { position: relative; padding-right: 3.6rem; }
.toc h2 { font-family: var(--serif); font-weight: 500; font-size: 20px; line-height: 1.45; color: var(--ink); margin: 0;
          transition: color .2s ease; }
.toc a:hover h2 { color: var(--accent); }
/* dotted leader from the end of the title's last line to the entry number (positioned by Pretext) */
.toc .leader { position: absolute; height: 0; border-bottom: 2px dotted color-mix(in srgb, var(--muted) 45%, transparent);
               display: none; }
.toc.measured .leader { display: block; }
.toc .no { position: absolute; right: 0; bottom: .2rem; font-size: 13px; color: var(--shu); letter-spacing: .05em; }
.toc p { margin: .5rem 0 0; color: var(--muted); font-size: 15px; line-height: 1.65; max-width: 56ch; }

/* ═════════════ post ═════════════ */
.post-wrap { position: relative; }
.post-head { margin-bottom: 2.6rem; }
.post-head .meta { font-size: 13.5px; color: var(--muted); margin-bottom: .9rem; }
.post-head h1 { font-family: var(--serif); font-weight: 500; font-size: clamp(30px, 5vw, 40px); line-height: 1.18;
                letter-spacing: -0.01em; color: var(--ink); margin: 0 0 .9rem; text-wrap: balance; }
.post-head .dek { color: var(--muted); font-size: 16px; margin: 0; }

/* in-post images: plain hairline frame, no tape, no tilt */
.taped { display: block; margin: 2.2rem auto; border: 1px solid var(--line); border-radius: 4px; overflow: hidden; }
.taped img { display: block; width: 100%; height: auto; margin: 0 !important; border: 0 !important; border-radius: 0 !important; }

/* the post's rubber stamp: floats right in the header; title and summary wrap around its inked outline */
.post-head { display: flow-root; }
.post-head .post-stamp { float: right; width: 220px; height: auto; margin: 0 0 .6rem 1.6rem;
  shape-margin: 16px; shape-image-threshold: .25; }
@media (max-width: 600px) { .post-head .post-stamp { width: 120px; margin-left: 1rem; } }
.post .taped, .post .figure-block, .post pre, .post table { clear: both; }

/* margin index (目次) on wide screens */
.margin-toc { position: absolute; top: 0; right: calc(100% + 48px); width: 190px; height: 100%; }
.margin-toc .inner { position: sticky; top: 2rem; font-size: 12.5px; line-height: 1.5; }
.margin-toc .label { font-family: var(--jp); letter-spacing: .35em; color: var(--muted); margin-bottom: .8rem; }
.margin-toc ol { list-style: none; padding: 0; margin: 0; border-left: 1px solid var(--line); }
.margin-toc a { display: block; padding: .3rem 0 .3rem .9rem; margin-left: -1px; border-left: 2px solid transparent;
                color: var(--muted); text-decoration: none; }
.margin-toc a:hover { color: var(--ink); }
.margin-toc a.on { color: var(--ink); border-left-color: var(--shu); }
.margin-toc .n { color: var(--date); margin-right: .4rem; }
@media (max-width: 1399px) { .margin-toc { display: none; } }
@media (min-width: 1400px) { .post .inline-toc { display: none; } }

/* prose */
.post { font-size: 16.5px; line-height: 1.8; color: var(--text); }
.post > h1:first-child { display: none; }            /* title lives in .post-head */
.post h2 { font-family: var(--serif); font-weight: 500; font-size: 25px; line-height: 1.3; color: var(--ink);
           margin: 3.4rem 0 1rem; scroll-margin-top: 2rem; }
.post h2 .sec { display: block; font-family: var(--mono); font-size: 12.5px; letter-spacing: .14em; color: var(--shu); margin-bottom: .3rem; }
.post h3 { font-family: var(--serif); font-weight: 500; font-size: 20px; color: var(--ink); margin: 2.2rem 0 .6rem; scroll-margin-top: 2rem; }
.post h4 { font-size: 16px; font-weight: 600; color: var(--ink); margin: 1.8rem 0 .5rem; }
.post p { margin: 0 0 1.15rem; }
.post strong { color: var(--ink); font-weight: 600; }
.post em { font-family: var(--serif); font-style: italic; font-size: 1.05em; }
.post ul, .post ol { padding-left: 1.4rem; margin: 0 0 1.2rem; }
.post li { margin: .35rem 0; }
.post li::marker { color: var(--date); }
.post hr { border: 0; text-align: center; margin: 3rem 0; }
.post hr::after { content: "~  ~  ~"; color: var(--moss); letter-spacing: .3em; white-space: pre; }

.post blockquote { margin: 1.8rem 0; padding: .2rem 0 .2rem 1.2rem; border-left: 3px solid var(--rosy); color: var(--muted); }
.post blockquote p:last-child { margin: 0; }

/* TL;DR → a memo card in the notebook */
.post .memo { position: relative; background: var(--kraft); padding: 1.5rem 1.4rem 1.2rem; margin: 2.2rem 0 2.4rem;
              border-radius: 3px; box-shadow: 0 1px 0 var(--line), 0 8px 20px -14px rgba(10,51,35,.4); }
.post .memo::after { content: "要約"; position: absolute; top: .7rem; right: .9rem; font-family: var(--jp); font-size: 12px;
  letter-spacing: .3em; color: var(--shu); opacity: .75; }

.post code { font-family: var(--mono); font-size: .88em; background: var(--wash); color: var(--ink); padding: .1em .35em; border-radius: 4px; }
.post pre { background: var(--wash); border: 1px solid var(--line); border-radius: 6px; padding: 1rem 1.2rem; overflow-x: auto;
            font-size: 14px; line-height: 1.6; margin: 1.6rem 0; }
.post pre code { background: none; padding: 0; color: var(--text); font-size: inherit; }
.post .hljs { background: transparent; }

.post table { border-collapse: collapse; margin: 1.8rem 0; font-size: 14.5px; display: block; overflow-x: auto; max-width: 100%; }
.post th, .post td { padding: .55rem .9rem; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
.post thead th { font-weight: 600; color: var(--ink); border-bottom: 2px solid var(--ink); }
.post tbody tr:hover td { background: var(--wash); }

.post details { margin: 1.8rem 0; border: 1px dashed var(--line); border-radius: 6px; padding: 0 1.1rem; background: var(--wash); }
.post details > summary { cursor: pointer; padding: .8rem 0; font-size: 14.5px; font-weight: 600; color: var(--ink); list-style: none; }
.post details > summary::-webkit-details-marker { display: none; }
.post details > summary::before { content: "＋ "; color: var(--shu); }
.post details[open] > summary::before { content: "－ "; }

.post .katex { font-size: 1.05em; color: var(--ink); }
.post .katex-display { margin: 1.6rem 0; overflow-x: auto; overflow-y: hidden; scrollbar-width: none; }

.post-end { margin-top: 4rem; padding-top: 1.5rem; border-top: 1px solid var(--line); display: flex; justify-content: space-between;
            gap: 1rem; font-size: 13.5px; color: var(--muted); }
.post-end .hanko-sm { color: var(--shu); font-family: var(--jp); border: 1.5px solid currentColor; border-radius: 4px; padding: .1rem .35rem;
                      transform: rotate(-6deg); display: inline-block; opacity: .85; margin-right: .5rem; }

/* ensō reading-progress mark, bottom right */
.progress { position: fixed; right: 1.4rem; bottom: 1.4rem; width: 42px; height: 42px; color: var(--ink); opacity: .7; z-index: 5; }
.progress circle { fill: none; stroke: currentColor; stroke-width: 3.5; stroke-linecap: round; }
.progress .track { stroke: var(--line); }
.progress text { font-family: var(--mono); font-size: 10px; fill: var(--muted); }

@media (max-width: 600px) {
  .page { padding: 1.4rem 1.15rem 4rem; }
  .post { font-size: 16px; }
  .post h2 { font-size: 22px; }
  .progress { right: .8rem; bottom: .8rem; width: 34px; height: 34px; }
}

/* ═════════════ figure layout contract (owned by the page, not the figures) ═════════════
   Posts use a wider 860px column; text and figures share exactly the same left and right edges.
   Panels inside a figure sit side by side when there is room and stack when there is not. */
body.post-page .page { max-width: 908px; }              /* 860px content + 2 × 24px padding */
.post .figure-block { position: relative; width: auto; margin-left: 0; margin-right: 0; }
.post .figure-block .fig-panels { display: flex; flex-wrap: wrap; gap: 24px 32px; justify-content: space-between; align-items: flex-start; }
.post .figure-block .fig-panel { flex: 1 1 380px; max-width: 444px; min-width: 0; }
.post .figure-block .fig-panel svg, .post .figure-block .fig-wide svg { display: block; width: 100%; height: auto; }
.post .figure-block .fig-wide { overflow-x: auto; }
@media (max-width: 600px) { .post .figure-block .fig-wide svg { min-width: 600px; } }

/* ═════════════ figure blocks (carried over from styles.css) ═════════════ */
.post .figure-block {
  min-width: 0;
  margin-top: 2.6rem;
  margin-bottom: 2.6rem;
  padding: .4rem 0 .2rem;
  color: var(--ink);
  font-family: var(--mono);
  line-height: 1.55;
}
.post .figure-block h2 {
  margin: 0 0 1rem;
  padding: 0;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 600;
  line-height: 1.65;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--date);
}
.post .figure-block .subtitle,
.post .figure-block .caption {
  max-width: 76ch;
  margin: 0 auto 1.2rem;
  font-family: var(--mono);
  font-size: 13.5px;
  font-style: normal;
  line-height: 1.65;
  text-align: center;
  color: var(--muted);
}
.post .figure-block .caption { margin: 1rem auto 0; }
.post .figure-block .redraw-note { margin: .6rem auto; font-size: 12px; }
.post .figure-block svg {
  display: block;
  width: 100%;
  height: auto;
  background: transparent;
  overflow: hidden;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.post .figure-block svg text { font-family: var(--mono); }
.post .figure-block .panel-label {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 400;
  text-align: center;
  color: var(--muted);
}
.post .figure-block .fig-panels { align-items: stretch; }
.post .figure-block .fig-panel { flex-basis: 400px; }
@media (max-width: 600px) {
  .post .figure-block { margin-top: 2rem; margin-bottom: 2rem; }
}

/* no-JS / crawler fallback: raw markdown, hidden once scripts run */
.md-fallback .md-raw { white-space: pre-wrap; word-wrap: break-word; font: inherit; font-size: 15px; line-height: 1.7; margin: 0; }
html.js .md-fallback { display: none; }

/* markdown tables, for posts that opt in (posts.js: tables: true): centred, hairline frame, soft header wash, alignment from the markdown colons */
.post .tbl-wrap { overflow-x: auto; margin: 1.8rem 0; text-align: center; -webkit-overflow-scrolling: touch; }
.post .tbl-wrap table { display: inline-table; margin: 0; max-width: none; text-align: left; font-size: 14.5px;
  border-collapse: separate; border-spacing: 0; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--paper); }
.post .tbl-wrap th, .post .tbl-wrap td { padding: .6rem 1.05rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.post .tbl-wrap th + th, .post .tbl-wrap td + td { border-left: 1px solid color-mix(in srgb, var(--line) 65%, transparent); }
.post .tbl-wrap tbody tr:last-child td { border-bottom: 0; }
.post .tbl-wrap thead th { background: var(--wash); color: var(--ink); font-weight: 600; border-bottom: 1px solid var(--line); white-space: nowrap; }
.post .tbl-wrap [align="right"] { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.post .tbl-wrap [align="center"] { text-align: center; font-variant-numeric: tabular-nums; white-space: nowrap; }
.post .tbl-wrap [align="left"] { text-align: left; }
.post p.tbl-cap { max-width: 68ch; margin: -.9rem auto 1.8rem; text-align: center; color: var(--muted); font-size: 13.5px; line-height: 1.6; }
.post p.tbl-cap em { font-family: var(--mono); }
@media (max-width: 600px) { .post .tbl-wrap table { font-size: 13.5px; } .post .tbl-wrap th, .post .tbl-wrap td { padding: .5rem .7rem; } }

/* an unfinished "<insert …>" note left in a post's markdown */
.post .todo-note { display: inline-block; font-family: var(--mono); font-size: 12.5px; line-height: 1.55; color: var(--muted);
  border: 1px dashed var(--shu); border-radius: 4px; padding: .15rem .5rem; background: var(--wash); }