/* ============================================================================
 * site.css — Page styles for the blog. Kept separate from viz.css so the
 * chart library stays portable. Edit freely.
 * ============================================================================ */

:root {
  --paper:        #fafaf7;
  --ink:          #0a0a0a;
  --ink-soft:     #525252;
  --ink-faint:    #a3a3a3;
  --rule:         #e5e5e2;
  --accent:       #0f5499;
  --accent-hover: #0a4078;
  --green:        #1f7a4a;
  --green-hover:  #155836;

  --font-sans:    'Geist', system-ui, -apple-system, sans-serif;
  --font-mono:    'Geist Mono', ui-monospace, SFMono-Regular, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  letter-spacing: -0.005em;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Masthead --------------------------------------------------------------- */

.masthead {
  max-width: 1080px;
  margin: 0 auto;
  padding: 18px 32px;
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.masthead-title {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 13px;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.masthead-title a { color: inherit; }

.masthead-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  letter-spacing: -0.02em;
}

.masthead-nav {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: -0.02em;
  display: flex;
  gap: 8px;
  align-items: baseline;
}

.masthead-nav a {
  color: var(--ink-soft);
}

.masthead-nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

.masthead-nav-sep {
  color: var(--ink-faint);
}

@media (max-width: 640px) {
  /* Hide the meta slot on phones — keep masthead to two slots. */
  .masthead { gap: 12px; flex-wrap: wrap; }
  .masthead-meta { display: none; }
  .masthead-nav { font-size: 11px; gap: 6px; }
}

/* Article ---------------------------------------------------------------- */

.article {
  max-width: 720px;
  margin: 0 auto;
  padding: 88px 32px 96px;
}

.kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--accent);
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}

.headline {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(36px, 5vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.035em;
  margin: 0 0 24px;
  color: var(--ink);
}

.standfirst {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 19px;
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 0 0 36px;
  max-width: 56ch;
  letter-spacing: -0.012em;
}

.byline {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--ink-soft);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--rule);
  margin: 0 0 56px;
  display: flex;
  gap: 20px;
  align-items: baseline;
  flex-wrap: wrap;
  letter-spacing: -0.005em;
}

.byline strong {
  color: var(--ink);
  font-weight: 500;
}

.byline-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  letter-spacing: -0.02em;
}

/* Paper card + download buttons ------------------------------------------
 *
 * The card frames the buttons so it's clear the download targets are the
 * *paper*, not the blog post you're reading. The card is set on a slightly
 * darker paper-cream so it reads as a citation/object embedded in the
 * article — not a continuation of the prose.
 * ----------------------------------------------------------------------- */

.paper-card {
  position: relative;
  background: #f3f0e7;
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 22px 22px 20px;
  margin: -16px 0 56px;
}

.paper-card-label {
  position: absolute;
  top: -9px;
  left: 16px;
  background: var(--paper);
  padding: 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--ink-soft);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.paper-card-title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.3;
  letter-spacing: -0.018em;
  margin: 2px 0 6px;
  color: var(--ink);
  max-width: 56ch;
}

.paper-card-meta {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0 0 16px;
  line-height: 1.5;
  letter-spacing: -0.005em;
}

.paper-card-meta .sep {
  color: var(--ink-faint);
  margin: 0 6px;
}

/* When there's no rich metadata, the buttons sit closer to the label. */
.paper-card-title + .paper-downloads,
.paper-card-meta + .paper-downloads {
  margin-top: 4px;
}

.paper-downloads {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}

.btn {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px 10px;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.01em;
  text-decoration: none;
  border: 1px solid transparent;
  transition:
    background 140ms ease,
    border-color 140ms ease,
    transform 140ms ease,
    box-shadow 140ms ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.btn:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-icon {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  position: relative;
  top: 1px;
}

.btn-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: -0.02em;
  opacity: 0.8;
}

/* Primary — blue */
.btn-paper {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-paper:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
}

/* Secondary — green */
.btn-paper-annotated {
  background: var(--green);
  color: #fff;
  border-color: var(--green);
}
.btn-paper-annotated:hover {
  background: var(--green-hover);
  border-color: var(--green-hover);
  color: #fff;
}

/* On note pages the card follows a tighter heading block, so reset
   the negative top-margin used to align it with post bylines. */
.note .paper-card {
  margin-top: 0;
}

/* Body copy -------------------------------------------------------------- */

.article p { margin: 0 0 1.4em; }
.article p strong { font-weight: 600; }

.article img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 32px auto;
}

.article img.embed {
  /* Obsidian ![[file]] embeds — slightly more confident framing. */
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--paper);
}

.article code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: #f1f0eb;
  padding: 1px 5px;
  border-radius: 3px;
}

.article pre {
  background: #f1f0eb;
  padding: 16px 18px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.55;
  border-radius: 4px;
}

.article pre code { background: none; padding: 0; }

/* Figure ----------------------------------------------------------------- */

.figure {
  /* Modest column-breakout — no frame */
  width: calc(100% + 96px);
  margin: 72px -48px;
  padding: 0;
  background: none;
  border: none;
}

@media (max-width: 880px) {
  .figure {
    width: 100%;
    margin-left: 0;
    margin-right: 0;
  }
}

.figure-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}

.figure-title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.32;
  letter-spacing: -0.022em;
  margin: 0 0 6px;
  color: var(--ink);
  max-width: 64ch;
}

.figure-subtitle {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0 0 32px;
  max-width: 60ch;
  letter-spacing: -0.005em;
}

.chart-host {
  width: 100%;
}

.figure-source {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  margin-top: 24px;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  letter-spacing: -0.02em;
}

/* Margin notes / asides --------------------------------------------------
 *
 * Wide screens: the note floats into the right margin, always visible,
 * <summary> hidden. Phones: the note collapses behind a tappable
 * "note ▸" summary that expands inline on tap.
 *
 * Use <details class="margin-note" markdown="1">…</details> in posts.
 * The site.js script keeps `open` in sync with the viewport.
 * ----------------------------------------------------------------------- */

.margin-note {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-soft);
  letter-spacing: -0.005em;
}

.margin-note > summary {
  display: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 0;
  list-style: none;
}

.margin-note > summary::-webkit-details-marker { display: none; }

.margin-note > summary::before {
  content: '▸ note';
}

.margin-note[open] > summary::before {
  content: '▾ note';
}

@media (min-width: 1080px) {
  /* Desktop: float into the right margin, sit alongside the prose. */
  .margin-note {
    float: right;
    clear: right;
    width: 220px;
    margin: 4px -260px 16px 24px;
    padding: 6px 0 6px 16px;
    border-left: 2px solid var(--accent);
  }
  /* Tablet floor — keep the float, but smaller margin offset. */
}

@media (min-width: 880px) and (max-width: 1079px) {
  .margin-note {
    float: right;
    clear: right;
    width: 200px;
    margin: 4px 0 16px 20px;
    padding: 6px 0 6px 14px;
    border-left: 2px solid var(--accent);
  }
}

@media (max-width: 720px) {
  /* Phone: a tappable summary expands the note inline. */
  .margin-note {
    display: block;
    margin: 24px 0;
    padding: 6px 0 6px 14px;
    border-left: 2px solid var(--accent);
  }
  .margin-note > summary { display: list-item; }
}

.margin-note p { margin: 0 0 0.6em; }
.margin-note p:last-child { margin-bottom: 0; }

/* Code blocks ------------------------------------------------------------
 *
 * The token colours come from static/css/code.css (Pygments-generated
 * stylesheet). Layout/spacing lives here.
 * ----------------------------------------------------------------------- */

.article .codehilite {
  position: relative;
  background: #f5f3ec;
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 14px 18px;
  margin: 28px 0;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.55;
}

.code-copy {
  position: absolute;
  top: 8px;
  right: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: -0.01em;
  color: var(--ink-faint);
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 2px 8px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 120ms var(--viz-ease, ease), color 120ms ease, border-color 120ms ease;
}

.codehilite:hover .code-copy,
.code-copy:focus {
  opacity: 1;
}

.code-copy:hover {
  color: var(--ink);
  border-color: var(--ink-soft);
}

.code-copy.is-copied {
  color: var(--accent);
  border-color: var(--accent);
  opacity: 1;
}

@media (max-width: 720px) {
  /* Always-visible on touch devices — there's no hover. */
  .code-copy { opacity: 1; }
}

.article .codehilite pre {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.55;
}

.article .codehilite code {
  background: none;
  padding: 0;
  font-size: inherit;
}

/* Series ----------------------------------------------------------------- */

.series-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.series-nav {
  margin: 48px 0 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--rule);
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--ink-soft);
}

.series-nav-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 12px;
}

.series-nav-title {
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 12px;
  font-size: 15px;
}

.series-nav ol {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: series;
}

.series-nav li {
  counter-increment: series;
  padding: 6px 0;
}

.series-nav li::before {
  content: counter(series, decimal-leading-zero) ' · ';
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: -0.02em;
  margin-right: 4px;
}

.series-nav li.is-current { color: var(--ink); }
.series-nav li.is-current strong { font-weight: 500; }

.series-block {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 32px 0;
}

.series-block:first-of-type { padding-top: 56px; }
.series-block + .series-block { padding-top: 0; }

.series-block-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 8px;
  margin-bottom: 4px;
  gap: 16px;
  flex-wrap: wrap;
}

.series-block-title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.01em;
  margin: 0;
  text-transform: uppercase;
  color: var(--ink);
}

.series-block-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: -0.02em;
}

.series-block .post-list-item {
  padding: 14px 0;
}

.series-block .post-list-item:first-child { padding-top: 12px; }
.series-block .post-list-item:last-child { border-bottom: none; }

/* Pull quote ------------------------------------------------------------- */

.pullquote {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink);
  margin: 48px 0;
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--accent);
  max-width: 56ch;
  letter-spacing: -0.012em;
  position: relative;
}

.pullquote::before {
  content: 'NOTE';
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.pullquote p { margin: 0; }

/* Index page ------------------------------------------------------------- */

.post-list {
  max-width: 720px;
  margin: 0 auto;
  /*padding: 56px 32px 32px;*/
  padding: 12px 0 0; 
  list-style: none;
}

.post-list-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
}

.post-list-item:first-child { padding-top: 0; }

.post-list-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

.post-list-title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 24px;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0 0 4px;
}

.post-list-title a { color: var(--ink); }
.post-list-title a:hover { color: var(--accent); text-decoration: none; }

.post-list-standfirst {
  font-size: 15px;
  color: var(--ink-soft);
  margin: 0 0 6px;
  max-width: 60ch;
}

.post-list-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: -0.02em;
}

/* Wiki links -------------------------------------------------------------
 *
 * [[Note Title]] in markdown becomes <a class="wiki-link">. Missing
 * targets render as <span class="wiki-link wiki-link--missing">.
 * ----------------------------------------------------------------------- */

.wiki-link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  transition: border-color 120ms ease;
}

.wiki-link:hover {
  text-decoration: none;
  border-bottom-color: var(--accent);
}

.wiki-link--missing {
  color: var(--ink-faint);
  border-bottom: 1px dashed var(--ink-faint);
  cursor: help;
}

/* Highlights -------------------------------------------------------------
 *
 * ==text== in markdown → <mark>text</mark>. Editorial-style highlight,
 * not a flat yellow block — looks like a marker pen.
 * ----------------------------------------------------------------------- */

.article mark {
  background: linear-gradient(transparent 60%, #ffe999 60%);
  color: inherit;
  padding: 0 2px;
}

/* Field Notes / Digital Garden -------------------------------------------
 *
 * The garden is a separate, lightweight section. Notes are undated (or
 * use an "updated" field), have a smaller headline, and render in a
 * compact list.
 * ----------------------------------------------------------------------- */

.note {
  padding-top: 64px;
}

.note-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 18px;
}

.note-eyebrow a { color: var(--ink-faint); }
.note-eyebrow a:hover { color: var(--accent); }

.note-title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 28px;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  color: var(--ink);
}

.note-updated {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: -0.02em;
  margin: 0 0 36px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--rule);
}

/* Garden block on the home page */

.garden-block {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 32px 56px;
}

.garden-block-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 8px;
  margin-bottom: 4px;
  gap: 16px;
  flex-wrap: wrap;
}

.garden-block-title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.01em;
  margin: 0;
  text-transform: uppercase;
  color: var(--ink);
}

.garden-block-title a { color: var(--ink); }
.garden-block-title a:hover { color: var(--accent); }

.garden-block-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: -0.02em;
}

.garden-block-more {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  margin: 16px 0 0;
  letter-spacing: -0.02em;
}

/* Garden index page */

.garden-index {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 32px 96px;
}

.garden-index-title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 32px;
  letter-spacing: -0.025em;
  margin: 0 0 12px;
}

.garden-index-blurb {
  font-size: 15px;
  color: var(--ink-soft);
  margin: 0 0 32px;
  max-width: 56ch;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 24px;
}

/* Note list (used on home page + garden index) */

.note-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.note-list-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 0px;
}

.note-list-item:last-child { border-bottom: none; }

.note-list-title {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.note-list-title:hover { color: var(--accent); text-decoration: none; }

.note-list-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: -0.02em;
}

.note-list-summary {
  grid-column: 1 / -1;
  font-size: 14px;
  color: var(--ink-soft);
  margin: 4px 0 0;
  max-width: 60ch;
}

/* Footer ----------------------------------------------------------------- */

footer.site-footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 32px 56px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  text-align: center;
  letter-spacing: -0.01em;
}