/* =============================================================================
   Domenico Bencivenga: blog styles

    1. Fonts              7. Hero               13. Archive
    2. Design tokens      8. Topic chips        14. 404 page
    3. Base               9. Post cards         15. Footer
    4. Layout            10. Topic cards        16. Motion
    5. Header & nav      11. Pages & posts      17. Print
    6. Theme toggle      12. Article text (prose)  18. Network page & connections

   Colors live in section 2. Change them there and the whole site follows,
   including the animated chart on the home page.
   ============================================================================= */


/* 1. Fonts ------------------------------------------------------------------ */
/* Newsreader by Production Type, SIL Open Font License (see assets/fonts/OFL.txt) */

@font-face {
  font-family: "Newsreader";
  font-style: normal;
  font-weight: 200 800;
  font-display: swap;
  src: url("../fonts/newsreader-latin-opsz-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Newsreader";
  font-style: italic;
  font-weight: 200 800;
  font-display: swap;
  src: url("../fonts/newsreader-latin-opsz-italic.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}


/* 2. Design tokens ----------------------------------------------------------- */

:root {
  color-scheme: light;

  /* Paper and ink */
  --bg: #faf7f2;
  --bg-elev: #f2ece2;
  --bg-sunk: #f1ebe0;
  --text: #1f1d1a;
  --text-soft: #45403a;
  --muted: #6b645b;
  --rule: #e2dace;
  --rule-strong: #cfc5b5;
  --focus: #4b3fa8;
  --shadow-rgb: 31 29 26;
  --grain-opacity: 0.045;

  /* Brand colors (checked for color-blind safety and contrast). Each subject's
     own color comes from _data/topics.yml, via assets/css/topics.css. */
  --green: #0c7b60;
  --indigo: #4b3fa8;
  --terracotta: #a4461f;

  /* Defaults that subject classes override */
  --topic: var(--text);
  --on-topic: var(--bg);
  --sel: var(--indigo);

  /* Type */
  --font-serif: "Newsreader", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  /* Space and shape */
  --wrap: 72rem;
  --wrap-narrow: 42rem;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --radius: 14px;
  --shadow: 0 1px 2px rgb(var(--shadow-rgb) / 0.05), 0 14px 34px -18px rgb(var(--shadow-rgb) / 0.32);

  /* Motion */
  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #16140f;
    --bg-elev: #201d17;
    --bg-sunk: #1d1a15;
    --text: #ece6dc;
    --text-soft: #cfc7ba;
    --muted: #a59c8e;
    --rule: #322d26;
    --rule-strong: #463f35;
    --focus: #8980e8;
    --shadow-rgb: 0 0 0;
    --grain-opacity: 0.05;
    --green: #3ba888;
    --indigo: #8980e8;
    --terracotta: #d8743a;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #16140f;
  --bg-elev: #201d17;
  --bg-sunk: #1d1a15;
  --text: #ece6dc;
  --text-soft: #cfc7ba;
  --muted: #a59c8e;
  --rule: #322d26;
  --rule-strong: #463f35;
  --focus: #8980e8;
  --shadow-rgb: 0 0 0;
  --grain-opacity: 0.05;
  --green: #3ba888;
  --indigo: #8980e8;
  --terracotta: #d8743a;
}


/* 3. Base -------------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-serif);
  font-size: clamp(1.0625rem, 1rem + 0.35vw, 1.1875rem);
  line-height: 1.65;
  font-kerning: normal;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* A whisper of paper grain behind everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .42 0 0 0 0 .3 0 0 0 0 .18 0 0 0 .9 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

:root[data-theme="dark"] body::before {
  filter: invert(1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body::before {
    filter: invert(1);
  }
}

img,
svg,
video,
canvas {
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: color-mix(in srgb, var(--sel) 24%, transparent);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -10rem;
  z-index: 200;
  padding: 0.7rem 1rem;
  border-radius: 8px;
  background: var(--text);
  color: var(--bg);
  font: 600 0.9rem/1 var(--font-sans);
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

.eyebrow {
  margin: 0 0 1rem;
  font: 600 0.78rem/1.3 var(--font-sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}


/* 4. Layout ------------------------------------------------------------------ */

.wrap {
  width: 100%;
  max-width: calc(var(--wrap) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.wrap--narrow {
  max-width: calc(var(--wrap-narrow) + 2 * var(--gutter));
}

.site-main {
  flex: 1;
  outline: none;
}


/* 5. Header & nav ------------------------------------------------------------ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
  view-transition-name: site-header;
}

@supports (background: color-mix(in srgb, red 50%, blue)) and ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .site-header {
    background: color-mix(in srgb, var(--bg) 80%, transparent);
    -webkit-backdrop-filter: saturate(1.4) blur(14px);
    backdrop-filter: saturate(1.4) blur(14px);
  }
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 1.75rem;
  min-height: 4.25rem;
}

.site-title {
  margin-right: auto;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
  color: var(--text);
  text-decoration: none;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.55rem 0;
  font: 500 0.93rem/1 var(--font-sans);
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.1rem;
  height: 2px;
  border-radius: 2px;
  background: var(--topic);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s var(--ease-out);
}

.nav-link:hover,
.nav-link.is-active,
.nav-link[aria-current="page"] {
  color: var(--text);
}

.nav-link:hover::after,
.nav-link.is-active::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

@media (max-width: 40rem) {
  .site-header {
    position: relative;
  }

  .site-header__inner {
    padding-block: 0.55rem 0.35rem;
  }

  .theme-toggle {
    order: 2;
  }

  .site-nav {
    order: 3;
    flex-basis: 100%;
  }

  .site-nav ul {
    gap: 0 1.2rem;
  }
}


/* 6. Theme toggle ------------------------------------------------------------ */

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  margin-right: -0.4rem;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.2s, border-color 0.2s, transform 0.2s var(--ease-out);
}

.theme-toggle[hidden] {
  display: none;
}

.theme-toggle:hover {
  background: var(--bg-elev);
  border-color: var(--rule);
}

.theme-toggle:active {
  transform: scale(0.92);
}

.theme-toggle__icon {
  overflow: visible;
}

.theme-toggle__sun,
.theme-toggle__moon {
  transform-box: fill-box;
  transform-origin: center;
  transition: transform 0.55s var(--ease-out), opacity 0.3s;
}

.theme-toggle__moon {
  opacity: 0;
  transform: rotate(-70deg) scale(0.4);
}

.theme-toggle[aria-pressed="true"] .theme-toggle__sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.4);
}

.theme-toggle[aria-pressed="true"] .theme-toggle__moon {
  opacity: 1;
  transform: none;
}


/* 7. Hero (home page) -------------------------------------------------------- */

.hero {
  position: relative;
  padding-bottom: clamp(0.5rem, 2vw, 1.5rem);
}

.hero__art {
  position: relative;
  height: clamp(230px, 30vw, 420px);
  margin-bottom: calc(-1 * clamp(2.25rem, 5.5vw, 4.75rem));
  -webkit-mask-image: linear-gradient(to bottom, #000 62%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 62%, transparent 100%);
}

html:not(.js) .hero__art {
  display: none;
}

.hero__canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: pan-y;
  cursor: crosshair;
}

.hero__text {
  position: relative;
  z-index: 1;
}

html:not(.js) .hero__text {
  padding-top: clamp(3rem, 8vw, 6rem);
}

.hero__eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 1rem;
  margin: 0 0 1rem;
  font: 600 0.76rem/1.4 var(--font-sans);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero__hint {
  display: none;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.hero__hint::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--terracotta);
  animation: hint-pulse 2.4s ease-in-out infinite;
}

@media (prefers-reduced-motion: no-preference) and (hover: hover) and (pointer: fine) {
  .js .hero__hint--pointer {
    display: inline-flex;
  }
}

@media (prefers-reduced-motion: no-preference) and (hover: none) {
  .js .hero__hint--touch {
    display: inline-flex;
  }
}

.hero__title {
  max-width: 15ch;
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 1.2rem + 6.4vw, 6.25rem);
  font-weight: 500;
  line-height: 0.98;
  letter-spacing: -0.028em;
  text-wrap: balance;
}

.hero__title em {
  font-weight: 450;
  color: var(--topic);
}

.hero__intro {
  margin: 1.25rem 0 0;
  font-size: clamp(1.15rem, 1rem + 0.6vw, 1.5rem);
  font-style: italic;
  color: var(--muted);
}


/* 8. Topic chips & section titles -------------------------------------------- */

.home-body {
  padding-bottom: clamp(1rem, 4vw, 2rem);
}

.topic-chips {
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  view-transition-name: topic-chips;
}

.topic-chips ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.62rem 1.05rem;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  background: var(--bg);
  color: var(--text);
  font: 500 0.9rem/1 var(--font-sans);
  text-decoration: none;
  transition: background-color 0.25s var(--ease-out), border-color 0.25s, color 0.25s, transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.chip::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--topic);
  transition: background-color 0.25s, transform 0.3s var(--ease-out);
}

.chip__count {
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  transition: color 0.25s;
}

.chip:hover,
.chip[aria-current="page"] {
  background: var(--topic);
  border-color: var(--topic);
  color: var(--on-topic);
}

.chip:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.chip:hover::before,
.chip[aria-current="page"]::before {
  background: var(--on-topic);
  transform: scale(1.15);
}

.chip:hover .chip__count,
.chip[aria-current="page"] .chip__count {
  color: inherit;
}

.home-section {
  margin-top: clamp(2.5rem, 6vw, 4.5rem);
}

.section-title {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 0.75rem;
  font: 600 0.76rem/1 var(--font-sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.section-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule);
}

.more-link-wrap {
  margin: 1.25rem 0 0;
}

.more-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0;
  border-bottom: 2px solid var(--topic);
  font: 600 0.9rem/1.2 var(--font-sans);
  color: var(--text);
  text-decoration: none;
}

.more-link span {
  transition: transform 0.35s var(--ease-out);
}

.more-link:hover span {
  transform: translateX(5px);
}

.empty-state {
  margin-top: 1.5rem;
  padding: 2.25rem 1.5rem;
  border: 1px dashed var(--rule-strong);
  border-radius: var(--radius);
  text-align: center;
  color: var(--muted);
}

.empty-state p {
  margin: 0;
}

.empty-state__title {
  margin-bottom: 0.35rem !important;
  font: 600 1.4rem/1.2 var(--font-serif);
  color: var(--text);
}

.empty-state a {
  color: var(--text);
}


/* 9. Post cards -------------------------------------------------------------- */

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

.post-card {
  --card-pad: min(1.25rem, var(--gutter));
  position: relative;
  margin-inline: calc(-1 * var(--card-pad));
  padding: 1.35rem var(--card-pad) 1.5rem;
  border-radius: var(--radius);
  transition: transform 0.5s var(--ease-out), background-color 0.3s, box-shadow 0.5s var(--ease-out);
}

.post-card + .post-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--card-pad);
  right: var(--card-pad);
  height: 1px;
  background: var(--rule);
  transition: opacity 0.3s;
}

.post-card:hover {
  transform: translateY(-4px);
  background: var(--bg-elev);
  box-shadow: var(--shadow);
}

.post-card:hover::before,
.post-card:hover + .post-card::before {
  opacity: 0;
}

.post-card:has(.post-card__title a:focus-visible) {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.post-card__title {
  width: fit-content;
  margin: 0.5rem 0 0.55rem;
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 1.2rem + 1.1vw, 2rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.012em;
  text-wrap: balance;
}

.post-card__title a {
  color: var(--text);
  text-decoration: none;
  background: linear-gradient(var(--topic), var(--topic)) 0 100% / 0 2px no-repeat;
  transition: background-size 0.55s var(--ease-out);
}

.post-card__title a:focus-visible {
  outline: none;
}

.post-card:hover .post-card__title a,
.post-card__title a:focus-visible {
  background-size: 100% 2px;
}

/* The whole card is one big link */
.post-card__title a::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
}

.post-card .topic-label {
  position: relative;
  z-index: 1;
}

.post-card__excerpt {
  display: -webkit-box;
  max-width: 62ch;
  margin: 0;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  font-size: 1.02rem;
  line-height: 1.55;
  color: var(--text-soft);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.2rem 0.55rem;
  margin: 0;
  font: 500 0.8rem/1.4 var(--font-sans);
  letter-spacing: 0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.post-meta__sep {
  opacity: 0.6;
}

.topic-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
}

.topic-label::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--topic);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--topic) 20%, transparent);
  transition: transform 0.3s var(--ease-out);
}

.topic-label:hover::before {
  transform: scale(1.35);
}


/* 10. Topic cards (home page) ------------------------------------------------ */

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: 1rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.topic-card {
  position: relative;
  overflow: hidden;
  padding: 1.5rem 1.3rem 1.35rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--bg);
  transition: transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out), border-color 0.3s;
}

.topic-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--topic);
  transform: scaleX(0.2);
  transform-origin: left;
  transition: transform 0.7s var(--ease-out);
}

.topic-card:hover {
  transform: translateY(-4px);
  border-color: var(--rule-strong);
  box-shadow: var(--shadow);
}

.topic-card:hover::before {
  transform: scaleX(1);
}

.topic-card:has(a:focus-visible) {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.topic-card__title {
  margin: 0 0 0.5rem;
  font: italic 500 1.75rem/1.1 var(--font-serif);
  letter-spacing: -0.01em;
}

.topic-card__title a {
  color: var(--topic);
  text-decoration: none;
}

.topic-card__title a:focus-visible {
  outline: none;
}

.topic-card__title a::after {
  content: "";
  position: absolute;
  inset: 0;
}

.topic-card__text {
  margin: 0 0 1.1rem;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text-soft);
}

.topic-card__count {
  margin: 0;
  font: 600 0.74rem/1 var(--font-sans);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.topic-card__count span {
  display: inline-block;
  transition: transform 0.35s var(--ease-out);
}

.topic-card:hover .topic-card__count span {
  transform: translateX(5px);
}


/* 11. Pages & posts ---------------------------------------------------------- */

.page-header {
  padding: clamp(2.5rem, 7vw, 5rem) 0 clamp(1rem, 3vw, 1.75rem);
}

.page-title {
  margin: 0;
  font: 500 clamp(2.5rem, 1.5rem + 4vw, 4.4rem)/1.02 var(--font-serif);
  letter-spacing: -0.024em;
  text-wrap: balance;
}

.page-lede {
  max-width: 44ch;
  margin: 1rem 0 0;
  font-size: clamp(1.12rem, 1rem + 0.5vw, 1.4rem);
  line-height: 1.45;
  font-style: italic;
  color: var(--muted);
}

.topic-header__title {
  font-style: italic;
  color: var(--topic);
}

.topic-header .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.topic-header .eyebrow::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--topic);
}

.topic-header + .topic-chips {
  margin-top: 0;
}

.topic-posts {
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
}

.post-header {
  padding: clamp(2.5rem, 7vw, 5rem) 0 0;
}

.post-header::after {
  content: "";
  display: block;
  width: 3.5rem;
  height: 3px;
  margin: 2.25rem 0 2.5rem;
  border-radius: 3px;
  background: var(--topic);
}

.post-title {
  width: fit-content;
  margin: 1rem 0 0;
  font: 600 clamp(2.35rem, 1.45rem + 3.6vw, 3.9rem)/1.04 var(--font-serif);
  letter-spacing: -0.024em;
  text-wrap: balance;
}

.post-lede {
  margin: 1.1rem 0 0;
  font-size: clamp(1.2rem, 1.05rem + 0.6vw, 1.5rem);
  line-height: 1.45;
  font-style: italic;
  color: var(--muted);
}

.post-footer {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
}

.post-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.post-nav__link {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  text-decoration: none;
  transition: transform 0.45s var(--ease-out), box-shadow 0.45s var(--ease-out), border-color 0.3s;
}

.post-nav__link:hover {
  transform: translateY(-3px);
  border-color: var(--rule-strong);
  box-shadow: var(--shadow);
}

.post-nav__link--next {
  text-align: right;
  grid-column: -2;
}

.post-nav__label {
  font: 600 0.74rem/1 var(--font-sans);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.post-nav__title {
  font: 600 1.15rem/1.3 var(--font-serif);
  color: var(--text);
}


/* 12. Article text (prose) --------------------------------------------------- */

.prose {
  --link-accent: var(--topic);
  overflow-wrap: break-word;
}

.page .prose {
  --link-accent: var(--indigo);
}

.prose > :first-child {
  margin-top: 0;
}

.prose p,
.prose ul,
.prose ol,
.prose dl,
.prose table,
.prose pre,
.prose figure,
.prose .highlighter-rouge {
  margin: 0 0 1.2em;
}

.prose p {
  text-wrap: pretty;
}

.prose h2,
.prose h3,
.prose h4 {
  font-family: var(--font-serif);
  line-height: 1.2;
  text-wrap: balance;
}

.prose h2 {
  margin: 2em 0 0.6em;
  font-size: 1.65em;
  font-weight: 600;
  letter-spacing: -0.012em;
}

.prose h3 {
  margin: 1.8em 0 0.5em;
  font-size: 1.3em;
  font-weight: 600;
}

.prose h4 {
  margin: 1.8em 0 0.5em;
  font: 700 0.8em/1.3 var(--font-sans);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.prose a {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--link-accent) 60%, transparent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
  background: linear-gradient(color-mix(in srgb, var(--link-accent) 18%, transparent), color-mix(in srgb, var(--link-accent) 18%, transparent)) 0 100% / 100% 0 no-repeat;
  transition: background-size 0.35s var(--ease-out), text-decoration-color 0.2s;
}

.prose a:hover {
  text-decoration-color: var(--link-accent);
  background-size: 100% 100%;
}

.prose strong {
  font-weight: 650;
}

.prose ul,
.prose ol {
  padding-left: 1.3em;
}

.prose li + li {
  margin-top: 0.4em;
}

.prose li::marker {
  color: var(--muted);
}

.prose blockquote {
  margin: 1.8em 0;
  padding: 0.15em 0 0.15em 1.25em;
  border-left: 3px solid var(--link-accent);
  font-size: 1.1em;
  font-style: italic;
  color: var(--text-soft);
}

.prose blockquote > :last-child {
  margin-bottom: 0;
}

.prose hr {
  height: auto;
  margin: 2.75em 0;
  border: 0;
  text-align: center;
}

.prose hr::before {
  content: "\2022\2003\2022\2003\2022";
  color: var(--muted);
}

.prose img {
  display: block;
  max-width: 100%;
  height: auto;
  margin-inline: auto;
  border-radius: 10px;
}

.prose figure img {
  margin-bottom: 0.6rem;
}

.prose figcaption,
.prose .caption {
  display: block;
  margin-top: 0.6rem;
  font: 0.85rem/1.5 var(--font-sans);
  font-style: normal;
  text-align: center;
  color: var(--muted);
}

.prose code {
  padding: 0.1em 0.35em;
  border: 1px solid var(--rule);
  border-radius: 5px;
  background: var(--bg-sunk);
  font-family: var(--font-mono);
  font-size: 0.84em;
}

.prose pre {
  overflow-x: auto;
  padding: 1rem 1.2rem;
  border: 1px solid var(--rule);
  border-radius: 12px;
  background: var(--bg-sunk);
  font-size: 0.84rem;
  line-height: 1.6;
}

.prose pre code {
  padding: 0;
  border: 0;
  background: none;
  font-size: inherit;
}

.prose .highlighter-rouge pre {
  margin: 0;
}

.prose .highlight .c,
.prose .highlight .c1,
.prose .highlight .cm,
.prose .highlight .cs { color: var(--muted); font-style: italic; }
.prose .highlight .k,
.prose .highlight .kd,
.prose .highlight .kn,
.prose .highlight .kr,
.prose .highlight .kt,
.prose .highlight .nt { color: var(--indigo); font-weight: 600; }
.prose .highlight .s,
.prose .highlight .s1,
.prose .highlight .s2,
.prose .highlight .sb,
.prose .highlight .sx,
.prose .highlight .na { color: var(--green); }
.prose .highlight .m,
.prose .highlight .mi,
.prose .highlight .mf,
.prose .highlight .mh,
.prose .highlight .no,
.prose .highlight .nb,
.prose .highlight .bp { color: var(--terracotta); }
.prose .highlight .nf,
.prose .highlight .nc,
.prose .highlight .fm { font-weight: 600; }
.prose .highlight .o,
.prose .highlight .ow,
.prose .highlight .p { color: var(--text-soft); }
.prose .highlight .err { color: inherit; background: none; }

.prose table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  font: 0.92rem/1.45 var(--font-sans);
  font-variant-numeric: tabular-nums;
}

.prose th,
.prose td {
  padding: 0.55rem 0.8rem;
  text-align: left;
  vertical-align: top;
}

.prose th {
  border-bottom: 2px solid var(--rule-strong);
  font-weight: 700;
}

.prose td {
  border-bottom: 1px solid var(--rule);
}

.prose sup,
.prose sub {
  line-height: 0;
}

.prose a.footnote {
  padding: 0 0.15em;
  background: none;
  text-decoration: none;
  font: 700 0.72em/1 var(--font-sans);
  color: var(--link-accent);
}

.prose .footnotes {
  margin-top: 3em;
  padding-top: 1.25em;
  border-top: 1px solid var(--rule);
  font-size: 0.88em;
  color: var(--text-soft);
}

.prose .footnotes a.reversefootnote {
  background: none;
  text-decoration: none;
}

.prose .katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.3em 0;
}

/* A drop cap on the first paragraph of each post (turn off with `dropcap: false`) */
.post-content:not(.no-dropcap) > p:first-child {
  display: flow-root;
}

.post-content:not(.no-dropcap) > p:first-child::first-letter {
  float: left;
  margin: 0.08em 0.1em 0 0;
  font-size: 3.7em;
  font-weight: 600;
  line-height: 0.8;
  color: var(--link-accent);
}

@media (max-width: 30rem) {
  .prose {
    hyphens: auto;
  }
}


/* 13. Archive ---------------------------------------------------------------- */

.archive-year {
  margin-top: 1.5rem;
}

.archive-year__title {
  margin: 0 0 0.5rem;
  font: 500 2.25rem/1 var(--font-serif);
  letter-spacing: -0.02em;
  color: var(--muted);
}

.archive-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--rule);
}

.archive-item {
  display: grid;
  grid-template-columns: 4.25rem 1fr auto;
  align-items: baseline;
  gap: 0.2rem 1rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--rule);
}

.archive-item__date {
  font: 500 0.82rem/1.4 var(--font-sans);
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.archive-item__title {
  justify-self: start;
  font: 600 1.2rem/1.3 var(--font-serif);
  color: var(--text);
  text-decoration: none;
  background: linear-gradient(var(--topic), var(--topic)) 0 100% / 0 2px no-repeat;
  transition: background-size 0.5s var(--ease-out);
}

.archive-item__title:hover,
.archive-item__title:focus-visible {
  background-size: 100% 2px;
}

.archive-item__topic {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font: 700 0.7rem/1 var(--font-sans);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.archive-item__topic::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--topic);
}

@media (max-width: 32rem) {
  .archive-item {
    grid-template-columns: 1fr auto;
  }

  .archive-item__title {
    grid-column: 1 / -1;
    grid-row: 2;
  }
}


/* 14. 404 page --------------------------------------------------------------- */

.not-found {
  padding-block: clamp(3rem, 9vw, 6rem) 1rem;
}

.not-found__chart {
  display: block;
  width: min(100%, 22rem);
  height: auto;
  margin-bottom: 2rem;
  overflow: visible;
}

.not-found__axis {
  stroke: var(--rule-strong);
  stroke-width: 1.5;
}

.not-found__line {
  fill: none;
  stroke: var(--green);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.not-found__dot {
  fill: var(--terracotta);
}

.not-found__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  margin: 2rem 0 0;
}

@media (prefers-reduced-motion: no-preference) {
  .not-found__line {
    stroke-dasharray: 520;
    stroke-dashoffset: 520;
    animation: draw-line 2.2s var(--ease-in-out) 0.2s forwards;
  }

  .not-found__dot {
    opacity: 0;
    transform-box: fill-box;
    transform-origin: center;
    animation: pop-in 0.5s var(--ease-out) 2.3s forwards;
  }
}


/* 15. Footer ----------------------------------------------------------------- */

.site-footer {
  margin-top: clamp(3rem, 8vw, 5rem);
  border-top: 1px solid var(--rule);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem 1.5rem;
  padding-block: 2rem;
  font: 500 0.85rem/1.4 var(--font-sans);
  color: var(--muted);
}

.site-footer__copy {
  margin: 0;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

.site-footer a:hover {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 0.25em;
}


/* 16. Motion ----------------------------------------------------------------- */

/* Smooth page-to-page transitions in browsers that support them. Post titles
   carry a matching view-transition-name, so they glide into place. */
@media (prefers-reduced-motion: no-preference) {
  @view-transition {
    navigation: auto;
  }
}

::view-transition-old(root) {
  animation: 160ms ease-in both vt-fade-out;
}

::view-transition-new(root) {
  animation: 380ms var(--ease-out) 60ms both vt-rise-in;
}

::view-transition-group(*) {
  animation-duration: 480ms;
  animation-timing-function: var(--ease-out);
}

/* The light/dark switch reveals the new theme in a growing circle (theme.js) */
html.theme-switching * {
  view-transition-name: none !important;
}

html.theme-switching::view-transition-old(root),
html.theme-switching::view-transition-new(root) {
  animation: none;
  mix-blend-mode: normal;
}

html.theme-switching::view-transition-new(root) {
  z-index: 2;
}

/* Cards gently rise into view as you scroll */
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .post-card,
    .topic-card,
    .archive-item {
      animation: reveal-up linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 60%;
    }
  }
}

@keyframes reveal-up {
  from { opacity: 0; translate: 0 28px; }
  to   { opacity: 1; translate: 0 0; }
}

@keyframes vt-fade-out {
  to { opacity: 0; }
}

@keyframes vt-rise-in {
  from { opacity: 0; translate: 0 14px; }
}

@keyframes hint-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%      { transform: scale(0.55); opacity: 0.45; }
}

@keyframes draw-line {
  to { stroke-dashoffset: 0; }
}

@keyframes pop-in {
  from { opacity: 0; transform: scale(0); }
  60%  { opacity: 1; transform: scale(1.6); }
  to   { opacity: 1; transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .post-card:hover,
  .topic-card:hover,
  .post-nav__link:hover,
  .chip:hover {
    transform: none;
  }
}


/* 17. Print ------------------------------------------------------------------ */

@media print {
  .site-header,
  .site-footer,
  .hero__art,
  .topic-chips,
  .post-nav,
  .skip-link,
  body::before {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .prose a {
    background: none;
  }
}


/* 18. Network page & connections --------------------------------------------- */

.network__header .page-title em {
  font-weight: 450;
  color: var(--indigo);
}

.network__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  margin-bottom: 0.9rem;
}

.network__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font: 500 0.82rem/1.3 var(--font-sans);
  color: var(--muted);
}

.network__legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.network__legend-item::before {
  content: "";
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background: var(--topic);
}

.network__legend-item--post::before {
  width: 0.5rem;
  height: 0.5rem;
  background: var(--muted);
}

.network__legend-item--line::before {
  width: 1.2rem;
  height: 2px;
  border-radius: 2px;
  background: var(--muted);
}

.network__hint {
  margin: 0;
  font: 500 0.8rem/1.3 var(--font-sans);
  color: var(--muted);
}

.network__hint > span {
  display: none;
}

@media (hover: hover) and (pointer: fine) {
  .network__hint--pointer {
    display: inline !important;
  }
}

@media (hover: none), (pointer: coarse) {
  .network__hint--touch {
    display: inline !important;
  }
}

.network__stage {
  position: relative;
  height: clamp(440px, 72vh, 780px);
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: calc(var(--radius) + 4px);
  background: radial-gradient(ellipse at 50% 45%, var(--bg-elev) 0%, var(--bg) 72%);
}

.network__stage canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: pan-y;
  cursor: grab;
}

.network__stage.is-pointing canvas {
  cursor: pointer;
}

.network__stage.is-dragging canvas {
  cursor: grabbing;
}

.network__stage.is-editing canvas,
.network__stage.is-linking canvas {
  cursor: crosshair;
}

html:not(.js) .network__stage,
html:not(.js) .network__bar {
  display: none;
}

.network__card {
  position: absolute;
  z-index: 2;
  top: 0;
  left: 0;
  width: min(19rem, calc(100% - 20px));
  padding: 0.85rem 1rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 12px;
  background: var(--bg);
  box-shadow: var(--shadow);
  pointer-events: none;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.2s var(--ease-out), transform 0.25s var(--ease-out);
}

.network__card[hidden] {
  display: none;
}

.network__card.is-visible {
  opacity: 1;
  transform: none;
}

.network__card.is-interactive {
  pointer-events: auto;
}

.network__card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.3rem;
  margin: 0;
  font: 600 0.72rem/1.3 var(--font-sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.network__card-kind {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text);
}

.network__card-kind::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--topic);
}

.network__card-title {
  margin: 0.4rem 0 0.35rem;
  font: 600 1.2rem/1.2 var(--font-serif);
  color: var(--text);
}

.network__card-text {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
  line-height: 1.45;
  color: var(--text-soft);
}

.network__card-count {
  margin: 0 0 0.55rem;
  font: 500 0.78rem/1.3 var(--font-sans);
  color: var(--muted);
}

.network__card-link {
  font: 600 0.85rem/1.4 var(--font-sans);
  color: var(--text);
  text-decoration: none;
  border-bottom: 2px solid var(--indigo);
}

.network-editor {
  margin-top: 1.25rem;
  padding: 1.25rem 1.4rem;
  border: 1px dashed var(--focus);
  border-radius: var(--radius);
  background: var(--bg);
  font-size: 1rem;
}

.network-editor[hidden] {
  display: none;
}

.network-editor p {
  margin: 0 0 0.75rem;
}

.network-editor__title {
  margin: 0 0 0.5rem;
  font: 600 1.35rem/1.2 var(--font-serif);
}

.network-editor__status {
  font: 600 0.85rem/1.4 var(--font-sans);
  color: var(--focus);
}

.network-editor__status:empty {
  display: none;
}

.network-editor__empty {
  font-style: italic;
  color: var(--muted);
}

.network-editor__changes {
  margin: 0 0 1rem;
  padding-left: 1.3rem;
}

.network-editor__change + .network-editor__change {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
}

.network-editor__what {
  margin-bottom: 0.25rem !important;
  font-weight: 650;
}

.network-editor__where,
.network-editor__note {
  font-size: 0.92rem;
  color: var(--text-soft);
}

.network-editor__where code {
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.network-editor__line {
  margin: 0 0 0.6rem;
  padding: 0.7rem 0.9rem;
  overflow-x: auto;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--bg-sunk);
  font: 0.88rem/1.5 var(--font-mono);
}

.network-editor__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.network-editor__button {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  background: var(--bg);
  color: var(--text);
  font: 600 0.82rem/1 var(--font-sans);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s;
}

.network-editor__button:hover {
  border-color: var(--text);
  background: var(--bg-elev);
}

.network-editor__button[hidden] {
  display: none;
}

.network-editor__unknown {
  margin: 0 0 1rem;
  font-size: 0.92rem;
  color: var(--text-soft);
}

.network-editor__unknown ul {
  margin: 0.25rem 0 0;
  padding-left: 1.2rem;
}

.network-index {
  margin-top: clamp(2.5rem, 6vw, 4rem);
}

.network-index__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: 1.75rem 2rem;
  margin-top: 1.25rem;
}

.network-index__topic {
  padding-top: 0.9rem;
  border-top: 3px solid var(--topic);
}

.network-index__title {
  margin: 0 0 0.6rem;
  font: italic 500 1.5rem/1.1 var(--font-serif);
}

.network-index__title a {
  color: var(--topic);
  text-decoration: none;
}

.network-index__title a:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

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

.network-index__posts li + li {
  margin-top: 0.45rem;
}

.network-index__posts a {
  color: var(--text);
  text-decoration: none;
  background: linear-gradient(var(--topic), var(--topic)) 0 100% / 0 1.5px no-repeat;
  transition: background-size 0.45s var(--ease-out);
}

.network-index__posts a:hover,
.network-index__posts a:focus-visible {
  background-size: 100% 1.5px;
}

.network-index__empty,
.network-index__linked {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.network-index__linked {
  margin-top: 0.75rem;
}

.network-index__linked a {
  color: var(--text);
}

.post-connections {
  margin-bottom: 1.75rem;
}

.post-connections__title {
  margin: 0 0 0.8rem;
  font: 600 0.76rem/1 var(--font-sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.post-connections__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
}

.chip--post {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 500;
}

.post-connections__network,
.post-footer__more {
  margin: 0;
}

.post-footer__more {
  margin-top: 1.25rem;
}