/* ——————————————————————————————————————————————
   Notebook — Guillaume Dubuisson Duplessis
   A quiet, reMarkable-inspired professional site.
   —————————————————————————————————————————————— */

/* =============================================
   1. @font-face declarations
   ============================================= */

@font-face {
  font-family: "IBM Plex Serif";
  font-weight: 300;
  font-style: normal;
  font-display: swap;
  src: url("/fonts/ibm-plex-serif-300.woff2") format("woff2");
  unicode-range: U+0020-007E, U+00A0-00FF, U+0100-017F;
}
@font-face {
  font-family: "IBM Plex Serif";
  font-weight: 300;
  font-style: italic;
  font-display: swap;
  src: url("/fonts/ibm-plex-serif-300-italic.woff2") format("woff2");
  unicode-range: U+0020-007E, U+00A0-00FF, U+0100-017F;
}
@font-face {
  font-family: "IBM Plex Serif";
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url("/fonts/ibm-plex-serif-400.woff2") format("woff2");
  unicode-range: U+0020-007E, U+00A0-00FF, U+0100-017F;
}
@font-face {
  font-family: "IBM Plex Serif";
  font-weight: 400;
  font-style: italic;
  font-display: swap;
  src: url("/fonts/ibm-plex-serif-400-italic.woff2") format("woff2");
  unicode-range: U+0020-007E, U+00A0-00FF, U+0100-017F;
}
@font-face {
  font-family: "IBM Plex Serif";
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  src: url("/fonts/ibm-plex-serif-500.woff2") format("woff2");
  unicode-range: U+0020-007E, U+00A0-00FF, U+0100-017F;
}
@font-face {
  font-family: "IBM Plex Serif";
  font-weight: 500;
  font-style: italic;
  font-display: swap;
  src: url("/fonts/ibm-plex-serif-500-italic.woff2") format("woff2");
  unicode-range: U+0020-007E, U+00A0-00FF, U+0100-017F;
}
@font-face {
  font-family: "IBM Plex Serif";
  font-weight: 600 700;
  font-style: normal;
  font-display: swap;
  src: url("/fonts/ibm-plex-serif-600.woff2") format("woff2");
  unicode-range: U+0020-007E, U+00A0-00FF, U+0100-017F;
}
@font-face {
  font-family: "IBM Plex Serif";
  font-weight: 600 700;
  font-style: italic;
  font-display: swap;
  src: url("/fonts/ibm-plex-serif-600-italic.woff2") format("woff2");
  unicode-range: U+0020-007E, U+00A0-00FF, U+0100-017F;
}
@font-face {
  font-family: "JetBrains Mono";
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url("/fonts/jetbrains-mono-400.woff2") format("woff2");
  unicode-range: U+0020-007E, U+00A0-00FF, U+0100-017F;
}
@font-face {
  font-family: "JetBrains Mono";
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  src: url("/fonts/jetbrains-mono-500.woff2") format("woff2");
  unicode-range: U+0020-007E, U+00A0-00FF, U+0100-017F;
}

/* =============================================
   2. :root palette + typography + spacing tokens (paper-mode defaults)
   ============================================= */

:root {
  --paper: #faf8f3;
  --paper-edge: #f2eee4;
  --ink: #1a1814;
  --ink-soft: #4a463e;
  --ink-faint: #8a857a;
  --ink-ghost: #b9b3a4;
  --rule: #e2dccc;
  --rule-soft: #ece6d6;
  --serif: "IBM Plex Serif", "Iowan Old Style", Georgia, serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  --page-w: 860px;
  --topbar-h: 56px;
}

/* =============================================
   3. :root[data-mode="ink"] ink-mode palette overrides
   NOTE: value is "ink" not "eink" — architecture D2 specifies paper | ink
   ============================================= */

:root[data-mode="ink"] {
  --paper: #17140f;
  --paper-edge: #0f0d09;
  --ink: #e8e2d2;
  --ink-soft: #b0aa99;
  --ink-faint: #7a7467;
  --ink-ghost: #4a453c;
  --rule: #2a2620;
  --rule-soft: #201c17;
}

/* =============================================
   4. CSS reset / base resets
   ============================================= */

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

/* =============================================
   5. Base typography
   ============================================= */

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern", "liga", "onum";
  transition: background 240ms ease, color 240ms ease;
}
::selection { background: var(--ink); color: var(--paper); }

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.eyebrow .hair {
  flex: 0 0 auto;
  width: 28px; height: 1px; background: var(--ink-faint);
}
h1.title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 28px;
  max-width: 18ch;
  text-wrap: balance;
}
h1.title em { font-style: italic; color: var(--ink-soft); }
.page h1 em { font-style: italic; color: var(--ink-soft); }
h2.section em { font-style: italic; color: var(--ink-soft); }
body:not([data-page="home"]) .page h1.title {
  font-size: clamp(32px, 3.6vw, 46px);
  max-width: 22ch;
}
body[data-page] .page p.lede {
  font-size: 21px;
  line-height: 1.55;
  color: var(--ink);
  max-width: 58ch;
  text-wrap: pretty;
}
h2.section {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 26px;
  letter-spacing: -0.005em;
  margin: 0 0 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
}
h2.section .sec-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.14em;
  font-weight: 400;
  text-transform: uppercase;
}
h3.sub {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 19px;
  margin: 0 0 6px;
  color: var(--ink);
  letter-spacing: -0.005em;
}
p { margin: 0 0 1.1em; color: var(--ink-soft); }
p.lede {
  font-size: 21px; line-height: 1.55;
  color: var(--ink); max-width: 58ch; text-wrap: pretty;
}
a { color: var(--ink); }
a:visited { color: var(--ink-soft); }
a.inline {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink-faint);
  transition: border-color 180ms;
}
a.inline:hover { border-bottom-color: var(--ink); }
em.ink { font-style: italic; color: var(--ink); }
.mono { font-family: var(--mono); }

/* =============================================
   6. Layout primitives
   ============================================= */

main { padding-top: var(--topbar-h); }

.page {
  max-width: var(--page-w);
  margin: 0 auto;
  padding: 72px 32px 96px;
  position: relative;
}
.page + .page {
  border-top: 1px solid var(--rule);
}
body[data-page] main > .page:first-child { padding-top: 96px; }

.folio {
  position: absolute;
  top: 28px;
  left: 32px;
  right: 32px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  pointer-events: none;
}
.folio .left { letter-spacing: 0.14em; }
.folio .right { font-variant-numeric: tabular-nums; }

.chapter-home .meta {
  margin-top: 40px;
  display: flex; flex-wrap: wrap; gap: 28px 40px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 64px;
}
.chapter-home .meta span strong { color: var(--ink); font-weight: 500; }

/* =============================================
   7. Chrome: topbar, mode-toggle, folio, bind, footer
   ============================================= */

.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 40;
  border-bottom: 1px solid var(--rule);
  /* @supports fallback: flat background if color-mix or backdrop-filter unsupported */
  background: var(--paper);
}
.topbar-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 28px;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand .dot {
  width: 5px; height: 5px; background: var(--ink); border-radius: 50%;
  display: inline-block;
}
.brand .full { display: inline; }
.brand .short { display: none; }
.topbar nav {
  display: flex;
  gap: 22px;
  flex-wrap: nowrap;
  justify-content: center;
  font-family: var(--mono);
  font-size: 12px;
}
.topbar nav a {
  color: var(--ink-soft);
  text-decoration: none;
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 180ms, border-color 180ms;
}
.topbar nav a:hover,
.topbar nav a.is-active {
  color: var(--ink);
  border-bottom-color: var(--ink);
}
.topbar nav a .n {
  font-size: 10px;
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
}
.topbar nav a:hover .n,
.topbar nav a.is-active .n {
  color: var(--ink);
}
.mode-toggle {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid var(--rule);
  padding: 6px 12px;
  cursor: pointer;
  border-radius: 2px;
  transition: border-color 180ms, color 180ms;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.mode-toggle:hover { border-color: var(--ink-soft); color: var(--ink); }
.mode-toggle .icon {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--ink);
}
:root[data-mode="ink"] .mode-toggle .icon {
  background: var(--paper);
  border: 1px solid var(--ink);
}
.topbar a:focus-visible,
.mode-toggle:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
  border-radius: 2px;
}

/* bind rule: left-edge notebook line */
.bind {
  position: fixed;
  top: var(--topbar-h); bottom: 0;
  left: 0; width: 1px;
  background: var(--rule-soft);
  pointer-events: none;
  z-index: 5;
}

/* colophon */
.colophon {
  margin-top: 80px;
  padding: 28px 0 0;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  flex-wrap: wrap;
  gap: 12px;
}
.colophon a.back {
  color: var(--ink-faint);
  text-decoration: none;
  border-bottom: 1px dotted var(--ink-ghost);
}
.colophon a.back:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* chapter break divider */
.chapter-break {
  margin: 96px 0 64px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.3em;
}
.chapter-break::before, .chapter-break::after {
  content: ""; flex: 1; height: 1px; background: var(--rule);
}

/* =============================================
   8. Per-chapter blocks (body[data-page="..."] hooks)
   Order: home, research, publications, code, blog, contact
   ============================================= */

/* — home: Now grid — */
.now {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 8px 32px;
}
.now dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding-top: 6px;
}
.now dd {
  margin: 0 0 16px;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.55;
  text-wrap: pretty;
}
.now dd .sub {
  display: block;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.5;
  margin-top: 4px;
}

/* — home: chapter layout — */
.now-section {
  margin-bottom: 56px;
}

.now-section h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 19px;
  margin: 24px 0 8px;
  color: var(--ink);
  letter-spacing: -0.005em;
}

.now-section ul {
  margin: 0;
  padding-left: 1.25em;
  color: var(--ink-soft);
}

.now-section ul li {
  margin-bottom: 0.45em;
  line-height: 1.6;
}

.recent-writing {
  padding-top: 16px;
  border-top: 1px solid var(--rule-soft);
}

.hero-lede {
  max-width: 58ch;
  margin: 0 0 32px;
  font-size: 21px;
  line-height: 1.55;
  color: var(--ink);
  text-wrap: pretty;
}
.hero-lede p {
  font-size: inherit;
  line-height: inherit;
  color: inherit;
  text-wrap: inherit;
  margin: 0 0 0.9em;
}
.hero-lede ul {
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink-soft);
  margin: 0;
  padding-left: 1.25em;
}
.hero-lede ul li { margin-bottom: 0.4em; }

.all-writing {
  display: inline-block;
  margin-top: 28px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px dotted var(--ink-ghost);
  padding-bottom: 1px;
}

.all-writing:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* — research: body[data-page="research"] scoped styles — */
body[data-page="research"] .page h1 {
  font-weight: 400;
  font-size: clamp(32px, 3.6vw, 46px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 40px;
  max-width: 22ch;
  text-wrap: balance;
}
body[data-page="research"] .page h2 {
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.005em;
  margin: 40px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
}
body[data-page="research"] .page h3 {
  font-weight: 500;
  font-size: 19px;
  margin: 28px 0 8px;
  color: var(--ink);
  letter-spacing: -0.005em;
}
/* Numbered "§ NN" principles list — shared by /research/ and the home
   .now-section principles block. */
body[data-page="research"] .page ol,
body[data-page="home"] .now-section ol {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  counter-reset: pr;
}
body[data-page="research"] .page ol > li,
body[data-page="home"] .now-section ol > li {
  counter-increment: pr;
  position: relative;
  padding: 22px 0 22px 68px;
  border-bottom: 1px solid var(--rule-soft);
}
body[data-page="research"] .page ol > li:last-child,
body[data-page="home"] .now-section ol > li:last-child {
  border-bottom: none;
}
body[data-page="research"] .page ol > li::before,
body[data-page="home"] .now-section ol > li::before {
  content: "§ " counter(pr, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 28px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
}
body[data-page="research"] .page ol > li h3,
body[data-page="home"] .now-section ol > li h3 {
  margin: 0 0 8px;
}
body[data-page="research"] .page p {
  margin: 0 0 1.1em;
  font-size: 17px;
  line-height: 1.6;
}
/* Compact measure for ordered-list item descriptions. Re-applies the 58ch cap
   intentionally removed from .page p above — keep this rule. */
body[data-page="research"] .page ol > li p,
body[data-page="home"] .now-section ol > li p {
  margin: 0;
  max-width: 58ch;
  text-wrap: pretty;
}
body[data-page="research"] .page ul {
  margin: 8px 0 16px;
  padding-left: 1.35em;
  color: var(--ink-soft);
}
body[data-page="research"] .page ul li {
  margin-bottom: 0.5em;
  line-height: 1.65;
  font-size: 17px;
}
body[data-page="research"] .page hr {
  border: none;
  border-top: 1px solid var(--rule-soft);
  margin: 48px 0;
}
body[data-page="research"] .page a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink-ghost);
  padding-bottom: 1px;
  transition: border-color 180ms;
}
body[data-page="research"] .page a:hover {
  border-bottom-color: var(--ink);
}
body[data-page="research"] .page a:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
  border-bottom-color: transparent;
}
body[data-page="research"] .page strong {
  color: var(--ink);
  font-weight: 500;
}

/* — publications: body[data-page="publications"] scoped styles — */
body[data-page="publications"] .page h3 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 40px 0 0;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule-soft);
}
body[data-page="publications"] .page h4 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  margin: 28px 0 8px;
}
body[data-page="publications"] .page p {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-soft);
}
body[data-page="publications"] .page ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
body[data-page="publications"] .page ul li {
  padding: 12px 0;
  border-bottom: 1px solid var(--rule-soft);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-soft);
}
body[data-page="publications"] .page ul li:last-child { border-bottom: none; }
body[data-page="publications"] .page ul li strong {
  color: var(--ink);
  font-weight: 500;
}
body[data-page="publications"] .page ul li a {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px dotted var(--ink-ghost);
  padding-bottom: 1px;
  white-space: nowrap;
}
body[data-page="publications"] .page ul li a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}
body[data-page="publications"] .page ul li a:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
  border-bottom-color: transparent;
}

/* — publications / blog: entry list — */
ul.entries { list-style: none; margin: 0; padding: 0; }
ul.entries li {
  display: grid;
  grid-template-columns: 84px 1fr auto;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule-soft);
  align-items: baseline;
}
ul.entries li:last-child { border-bottom: none; }
ul.entries .date {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  text-transform: uppercase;
  padding-top: 3px;
  font-variant-numeric: tabular-nums;
}
ul.entries .title-line {
  font-size: 18px;
  color: var(--ink);
  line-height: 1.45;
}
ul.entries .title-line a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--ink-ghost);
  padding-bottom: 1px;
}
ul.entries .title-line a:hover { border-bottom-color: var(--ink); }
ul.entries .sub-line {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-soft);
  font-style: italic;
  line-height: 1.5;
}
ul.entries .authors {
  display: block;
  margin-top: 4px;
  font-size: 13.5px;
  color: var(--ink-faint);
  font-family: var(--serif);
  line-height: 1.5;
}
ul.entries .right {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
  display: flex; gap: 14px;
}
ul.entries .right a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px dotted var(--ink-ghost);
}
ul.entries .right a:hover { color: var(--ink); border-bottom-color: var(--ink); }
ul.entries.compact li { padding: 16px 0; }
.empty-state {
  margin-top: 32px;
  font-style: italic;
  color: var(--ink-soft);
}

/* year label for grouped lists */
.year-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 40px 0 14px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule-soft);
  display: flex; justify-content: space-between;
}
.year-label:first-of-type { margin-top: 16px; }

/* — code: body[data-page="code"] scoped styles — */
body[data-page="code"] .page h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(40px, 4.5vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 36px;
  max-width: 22ch;
  text-wrap: balance;
}
body[data-page="code"] .code-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--rule-soft);
}
body[data-page="code"] .code-grid .card {
  padding: 28px 28px 28px 0;
  border-bottom: 1px solid var(--rule-soft);
  border-right: 1px solid var(--rule-soft);
}
body[data-page="code"] .code-grid .card:nth-child(2n) {
  padding: 28px 0 28px 28px;
  border-right: none;
}
body[data-page="code"] .code-grid .tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 10px;
}
body[data-page="code"] .code-grid h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 17px;
  letter-spacing: -0.005em;
  margin: 0 0 2px;
  color: var(--ink);
}
body[data-page="code"] .code-grid h3 a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink-ghost);
  padding-bottom: 1px;
}
body[data-page="code"] .code-grid h3 a:hover { border-bottom-color: var(--ink); }
body[data-page="code"] .code-grid h3 a:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}
body[data-page="code"] .code-grid p {
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 6px 0 14px;
  max-width: 42ch;
  text-wrap: pretty;
}
body[data-page="code"] .code-grid .stats {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
  display: flex;
  gap: 18px;
  font-variant-numeric: tabular-nums;
  margin: 0;
}
@media (min-width: 681px) {
  body[data-page="code"] .code-grid .card:last-child:nth-child(odd) {
    border-right: none;
  }
  body[data-page="code"] .code-grid .card:last-child,
  body[data-page="code"] .code-grid .card:nth-last-child(2):nth-child(odd) {
    border-bottom: none;
  }
}

/* — blog: body[data-page="blog"] scoped styles — */
body[data-page="blog"] .page h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(40px, 4.5vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 36px;
  max-width: 22ch;
  text-wrap: balance;
}
body[data-page="blog"] ul.entries .title-line a:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
  border-bottom-color: transparent;
}

/* — blog: single post — */
body[data-page="blog"] article.page {
  max-width: 65ch;
}
body[data-page="blog"] .post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 16px;
  margin: -20px 0 40px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
body[data-page="blog"] .post-meta .sub-line {
  font-family: var(--serif);
  font-size: 14px;
  font-style: italic;
  text-transform: none;
  letter-spacing: 0;
  color: var(--ink-soft);
}
body[data-page="blog"] .content {
  font-family: var(--serif);
  font-size: clamp(16px, 1.8vw, 18px);
  line-height: 1.75;
  color: var(--ink);
}
body[data-page="blog"] .content p { margin: 0 0 1.4em; color: var(--ink); }
body[data-page="blog"] .content h2 {
  font-weight: 500;
  font-size: clamp(20px, 2.2vw, 24px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 2.2em 0 0.6em;
}
body[data-page="blog"] .content h3 {
  font-weight: 500;
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.25;
  margin: 1.8em 0 0.5em;
}
body[data-page="blog"] .content ul,
body[data-page="blog"] .content ol {
  padding-left: 1.6em;
  margin: 0 0 1.4em;
}
body[data-page="blog"] .content li { margin-bottom: 0.4em; }
body[data-page="blog"] .content blockquote {
  margin: 1.6em 0;
  padding: 0 0 0 1.4em;
  border-left: 2px solid var(--rule);
  color: var(--ink-soft);
  font-style: italic;
}
body[data-page="blog"] .content a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--ink-ghost);
  padding-bottom: 1px;
  overflow-wrap: anywhere;
}
body[data-page="blog"] .content a:hover { border-bottom-color: var(--ink); }
body[data-page="blog"] .content a:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
  border-bottom-color: transparent;
}
body[data-page="blog"] .content code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--paper-edge);
  padding: 0.1em 0.35em;
  border-radius: 2px;
}
body[data-page="blog"] .content pre {
  font-family: var(--mono);
  font-size: 0.83em;
  line-height: 1.6;
  background: var(--paper-edge);
  padding: 1.2em 1.4em;
  overflow-x: auto;
  border-radius: 2px;
  margin: 0 0 1.4em;
}
body[data-page="blog"] .content pre code {
  background: none;
  padding: 0;
  font-size: inherit;
}
body[data-page="blog"] .content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.6em auto;
}
body[data-page="blog"] .content figure {
  margin: 1.6em 0;
}
body[data-page="blog"] .content figure img { margin: 0 auto; }
body[data-page="blog"] .content figcaption {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  text-align: center;
  margin-top: 0.6em;
}
body[data-page="blog"] .content hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2.4em auto;
  width: 30%;
}
body[data-page="blog"] .content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 0.94em;
}
body[data-page="blog"] .content th,
body[data-page="blog"] .content td {
  text-align: left;
  padding: 0.5em 0.8em;
  border-bottom: 1px solid var(--rule);
}
body[data-page="blog"] .content th {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 500;
}

/* — contact: definition list — */
dl.contact {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 0 28px;
  margin: 0; padding: 0;
}
dl.contact dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding: 16px 0;
  border-bottom: 1px solid var(--rule-soft);
  align-self: baseline;
}
dl.contact dd {
  margin: 0;
  font-size: 18px;
  color: var(--ink);
  padding: 16px 0;
  border-bottom: 1px solid var(--rule-soft);
  align-self: baseline;
}
dl.contact dt:last-of-type,
dl.contact dd:last-of-type { border-bottom: none; }
dl.contact dd a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--ink-ghost);
  padding-bottom: 1px;
}
dl.contact dd a:hover { border-bottom-color: var(--ink); }

/* pagination */
.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  flex-wrap: wrap;
}
.pagination a, .pagination span.disabled {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px dotted var(--ink-ghost);
  padding-bottom: 1px;
}
.pagination a:hover { color: var(--ink); border-bottom-color: var(--ink); }
.pagination span.disabled { opacity: 0.4; border-bottom-color: transparent; }
.pagination .pages { display: inline-flex; gap: 12px; }
.pagination .pages a, .pagination .pages span.current {
  font-variant-numeric: tabular-nums;
  padding: 2px 4px;
  border-bottom: 1px dotted var(--ink-ghost);
}
.pagination .pages span.current { color: var(--ink); border-bottom-color: var(--ink); }

/* =============================================
   9. Utility states
   ============================================= */

.is-active { color: var(--ink); }
.mode-transitioning * { transition: none !important; }

/* =============================================
   10. Responsive @media blocks (mobile-first, min-width)
   Breakpoints: 560 / 640 / 680 / 820 / 900 / 1100 px
   ============================================= */

@media (max-width: 1100px) {
  .brand .full { display: none; }
  .brand .short { display: inline; }
  .topbar nav { gap: 18px; }
  .topbar nav a { letter-spacing: 0.02em; }
}
@media (max-width: 900px) {
  .bind { display: none; }
}
@media (max-width: 820px) {
  .topbar nav { gap: 14px; font-size: 11px; }
  .topbar nav a { padding: 8px 4px; }
  .topbar nav a .label { display: none; }
  .topbar nav a .n { font-size: 11px; color: var(--ink-soft); }
  .topbar nav a.is-active .n, .topbar nav a:hover .n { color: var(--ink); }
}
@media (max-width: 680px) {
  body[data-page="code"] .code-grid { grid-template-columns: 1fr; }
  body[data-page="code"] .code-grid .card,
  body[data-page="code"] .code-grid .card:nth-child(2n) {
    padding: 24px 0; border-right: none;
  }
  body[data-page="code"] .code-grid .card:last-child {
    border-bottom: none;
  }
}
@media (max-width: 640px) {
  .now { grid-template-columns: 1fr; gap: 4px; }
  ul.entries li {
    grid-template-columns: 60px 1fr;
    gap: 8px 16px;
  }
  ul.entries li .right { grid-column: 1 / -1; padding-top: 4px; }
}
@media (max-width: 560px) {
  .mode-toggle .label-text { display: none; }
  .mode-toggle { padding: 6px 8px; }
  .topbar-inner { padding: 12px 16px; gap: 12px; }
  body[data-page="research"] .page ol > li { padding-left: 52px; }
}

/* =============================================
   11. @supports feature queries (graceful degradation)
   ============================================= */

@supports (background: color-mix(in oklab, red, blue)) {
  .topbar {
    background: color-mix(in oklab, var(--paper) 94%, transparent);
  }
}

@supports (backdrop-filter: blur(1px)) {
  .topbar {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }
}

/* =============================================
   12. @media print
   ============================================= */

@media print {
  .topbar, .bind, .pagination, .colophon { display: none !important; }
  body { background: #fff; color: #000; font-size: 12pt; }
  main { padding-top: 0; }
  .page { padding: 0; page-break-after: always; }
}

/* =============================================
   13. @media (prefers-reduced-motion: reduce) — overrides ALL transitions
   Must be last so it wins over all other declarations.
   ============================================= */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}