/* Clusterity — editorial ledger.
   Inter for everything, JetBrains Mono only for data (prices, dates, tool names).
   Brick red from the wordmark, warm paper, hairlines instead of cards. */

@font-face {
  font-family: 'Inter';
  src: url('/fonts/inter-latin.woff2') format('woff2');
  font-weight: 100 900;
  font-display: swap;
  font-style: normal;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('/fonts/jetbrains-mono-latin.woff2') format('woff2');
  font-weight: 100 800;
  font-display: swap;
  font-style: normal;
}

:root {
  --paper: #fbf8f3;
  --paper-2: #f3eee6;
  --ink: #17140f;
  --ink-2: #4a453e;
  --muted: #6d675f;
  --faint: #8a847c;
  --line: rgba(23, 20, 15, 0.14);
  --line-strong: #17140f;
  --brick: #b01f0a;
  --brick-hover: #8f1808;
  --brick-light: #ff7a5c;

  --sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --measure: 1312px;
  --gutter: clamp(1.25rem, 4.5vw, 4rem);
  --rail: 200px;
  --gap: 32px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; overflow-x: clip; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
[id] { scroll-margin-top: 84px; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  font-feature-settings: "kern" 1, "liga" 1, "cv05" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

h1, h2, h3, h4, p, blockquote, address, li, time { overflow-wrap: break-word; }
h1, h2, h3, h4, p { margin: 0; }
h1, h2, h3 { font-weight: 600; letter-spacing: -0.025em; }
a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--brick); }
:focus-visible { outline: 2px solid var(--brick); outline-offset: 3px; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--ink); color: var(--paper); padding: 8px 12px; font-size: 14px; }
.skip:focus { top: 12px; color: var(--paper); }

.wrap { max-width: var(--measure); margin-inline: auto; padding-inline: var(--gutter); }

/* ---- small labels: Inter, uppercase, light tracking. One recipe, three uses. ---- */
.label, .eyebrow, .row .meta, .entry .meta {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow { color: var(--brick); }
.row .meta, .entry .meta { line-height: 1.8; }
.mono { font-family: var(--mono); }

/* ---- rail grid: 200px label column + content ---- */
.rail {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  gap: var(--gap);
  align-items: start;
}
.section-head.rail, .notes-head .rail { align-items: end; }
@media (max-width: 800px) {
  .rail { grid-template-columns: 1fr; gap: 12px; }
}

/* ---- header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 66px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 22px;
  letter-spacing: -0.03em;
  line-height: 1;
}
.brand svg { width: 22px; height: 22px; display: block; flex: none; }
.brand:hover { color: var(--ink); }
.nav { display: flex; align-items: center; gap: 28px; font-size: 14px; font-weight: 500; }
.nav a { color: var(--ink); }
.nav a:hover { color: var(--brick); }
.nav .nav-ext { color: var(--muted); }
.nav .nav-cta { color: var(--brick); border-bottom: 1px solid var(--brick); padding-bottom: 2px; }
.nav .nav-cta:hover { color: var(--brick-hover); border-color: var(--brick-hover); }
.nav a.active { border-bottom: 1px solid var(--ink); padding-bottom: 2px; }
.menu { display: none; position: relative; }
.menu summary { list-style: none; cursor: pointer; min-height: 44px; padding: 0 2px; display: flex; align-items: center; font-size: 14px; font-weight: 500; color: var(--ink); }
.menu summary::-webkit-details-marker { display: none; }
.menu[open] summary { color: var(--brick); }
.menu-list {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  min-width: 220px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  display: flex;
  flex-direction: column;
  padding: 8px 0;
}
.menu-list a { display: block; padding: 12px 20px; font-size: 16px; font-weight: 500; }
.menu-list a.active { border: 0; background: var(--paper-2); }
.menu-list .nav-cta { border: 0; border-top: 1px solid var(--line); margin-top: 8px; padding-top: 16px; }
@media (max-width: 800px) {
  .nav { display: none; }
  .menu { display: block; }
}

/* ---- buttons & links ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  font-size: 15px;
  padding: 14px 20px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  transition: background .15s, border-color .15s, color .15s;
}
.btn:hover { background: var(--brick); border-color: var(--brick); color: var(--paper); }
.btn-paper { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.btn-paper:hover { background: var(--brick-light); border-color: var(--brick-light); color: var(--ink); }
.link {
  font-weight: 500;
  font-size: 14px;
  border-bottom: 1px solid rgba(23, 20, 15, 0.3);
  padding-bottom: 1px;
}
.link:hover { border-color: var(--brick); }
.cta-row { display: flex; flex-wrap: wrap; gap: 28px; align-items: center; }

/* ---- hero ---- */
.hero { padding: clamp(3rem, 7vw, 6rem) 0 clamp(2.5rem, 5vw, 4.5rem); }
.hero-body { grid-column: 2; display: flex; flex-direction: column; gap: 32px; }
.hero h1 {
  font-size: clamp(2.1rem, 4.6vw, 4rem);
  line-height: 1.04;
  max-width: 17ch;
  text-wrap: balance;
}
.hero h1 em { font-style: normal; color: var(--brick); }
.hero .lede {
  font-size: clamp(1.1rem, 1.6vw, 1.375rem);
  line-height: 1.5;
  color: var(--ink-2);
  max-width: 52ch;
}
@media (max-width: 800px) {
  .hero { padding-top: 2.25rem; }
  .hero-body { grid-column: auto; gap: 24px; }
  .hero h1 { max-width: none; font-size: clamp(2rem, 9vw, 2.6rem); }
  .hero .lede { font-size: 1.05rem; }
}

/* ---- split band ---- */
.split {
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 1px minmax(0, 1fr);
}
.split > div { display: flex; flex-direction: column; gap: 14px; padding: 44px 48px 44px 0; }
.split > .split-line { background: var(--line-strong); padding: 0; }
.split > div:last-child { padding: 44px 0 44px 48px; }
.split h2 { font-size: clamp(1.5rem, 2.4vw, 2.125rem); line-height: 1.1; }
.split p { color: var(--ink-2); max-width: 46ch; }
.split-note { padding-top: 20px; text-align: center; font-size: 14px; color: var(--faint); }
@media (max-width: 800px) {
  .split { grid-template-columns: 1fr; }
  .split > div, .split > div:last-child { padding: 28px 0; gap: 10px; }
  .split > .split-line { height: 1px; width: 100%; }
  .split-note { text-align: left; font-size: 13px; }
}

/* ---- section head ---- */
section { padding-top: clamp(4rem, 7vw, 6rem); }
.section-head { margin-bottom: 36px; }
.section-head .head-row { display: flex; justify-content: space-between; align-items: baseline; gap: 32px; }
.section-head h2 { font-size: clamp(1.6rem, 2.8vw, 2.375rem); line-height: 1.1; }
.section-head .aside { font-size: 13px; color: var(--faint); white-space: nowrap; }
.section-strong { border-top: 1px solid var(--line-strong); padding-top: clamp(3rem, 5vw, 4rem); }
@media (max-width: 800px) {
  section { padding-top: 3.25rem; }
  .section-head { margin-bottom: 24px; }
  .section-head .head-row { flex-direction: column; align-items: flex-start; gap: 8px; }
  .section-head .aside { white-space: normal; }
  .section-strong { padding-top: 2.75rem; }
}

/* ---- ledger rows ---- */
.ledger { display: flex; flex-direction: column; }
.row {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr) 220px;
  gap: var(--gap);
  padding: 28px 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
.row:last-child { border-bottom: 1px solid var(--line); }
.row.row-strong { border-top: 1px solid var(--line-strong); }
.row h3 { font-size: 24px; line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 8px; }
.row h3.mono { font-family: var(--mono); font-weight: 500; letter-spacing: 0; }
.row p { color: var(--ink-2); max-width: 62ch; }
.row ul { list-style: none; margin: 12px 0 0; padding: 0; color: var(--muted); font-size: 15px; display: flex; flex-direction: column; gap: 4px; }
.row ul li { padding-left: 16px; position: relative; }
.row ul li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 5px; height: 5px; background: var(--brick); }
.row .price { font-family: var(--mono); font-size: 13px; color: var(--ink); text-align: right; line-height: 1.7; }
.row .price small { display: block; font-family: var(--sans); font-size: 13px; color: var(--muted); }
.row .price small + small { margin-top: 6px; }
.row .price a { border-bottom: 1px solid rgba(23, 20, 15, 0.3); }
.row .price a:hover { border-color: var(--brick); }
.ledger-note { margin-top: 16px; font-size: 14px; color: var(--faint); }
@media (max-width: 800px) {
  .row {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas: "meta price" "body body";
    gap: 12px 16px;
    padding: 22px 0;
  }
  .row .meta { grid-area: meta; align-self: end; }
  .row > div:nth-child(2) { grid-area: body; }
  .row .price { grid-area: price; align-self: end; }
  .row h3 { font-size: 22px; }
  .row ul { font-size: 14.5px; }
}

/* ---- writing: two lanes ---- */
.lanes { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 64px; }
.lane { display: flex; flex-direction: column; gap: 20px; }
.lane-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; }
.lane-head h3 { font-size: 24px; }
.lane-head .label.brick { color: var(--brick); }
.lane > p { color: var(--ink-2); font-size: 16px; }
.posts { display: flex; flex-direction: column; }
.post {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 20px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  align-items: baseline;
}
.post:last-child { border-bottom: 1px solid var(--line); }
.post time { font-family: var(--mono); font-size: 12px; color: var(--faint); }
.post span { font-size: 16.5px; font-weight: 500; line-height: 1.35; }
.post:hover span { color: var(--brick); }
.lane .link { align-self: flex-start; }
.empty { font-size: 15px; color: var(--faint); padding: 14px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
@media (max-width: 800px) {
  .lanes { grid-template-columns: 1fr; gap: 40px; }
  .post { grid-template-columns: 84px minmax(0, 1fr); gap: 12px; padding: 12px 0; }
  .post span { font-size: 15.5px; }
}

/* ---- about ---- */
.about-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 64px; align-items: start; }
.about-copy { display: flex; flex-direction: column; gap: 20px; }
.about-copy h2 { font-size: clamp(1.6rem, 2.8vw, 2.375rem); line-height: 1.1; }
.about-copy p { color: var(--ink-2); max-width: 48ch; }
.people { display: flex; flex-direction: column; }
.person {
  display: flex;
  gap: 20px;
  align-items: center;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.person:last-child { border-bottom: 1px solid var(--line); }
.person .avatar { width: 72px; height: 72px; object-fit: cover; flex: none; }
.person .name { font-weight: 600; }
.person .role { font-size: 14px; color: var(--muted); line-height: 1.6; }
@media (max-width: 800px) { .about-grid { grid-template-columns: 1fr; gap: 32px; } }

/* ---- contact band ---- */
.contact {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(2.5rem, 5vw, 4rem) clamp(1.5rem, 5vw, 4rem);
}
.contact .eyebrow { color: var(--brick-light); }
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 64px; }
.contact-copy { display: flex; flex-direction: column; gap: 24px; }
.contact h2 { font-size: clamp(1.6rem, 2.8vw, 2.375rem); line-height: 1.1; color: var(--paper); }
.contact p { color: #c9c3bb; max-width: 46ch; }
.contact .link { color: var(--paper); border-color: rgba(251, 248, 243, 0.4); }
.contact .link:hover { color: var(--brick-light); border-color: var(--brick-light); }
.addresses { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px; font-size: 14px; line-height: 1.7; color: #c9c3bb; }
.addresses address { font-style: normal; }
.addresses .label { color: var(--faint); display: block; }
.addresses .addr-gap { display: block; margin-bottom: 10px; }
@media (max-width: 800px) {
  .contact { margin-inline: calc(-1 * var(--gutter)); padding: 2.5rem var(--gutter); }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .addresses { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; font-size: 13px; }
}

/* ---- footer ---- */
.site-footer { padding: 32px 0 48px; font-size: 13px; color: var(--faint); }
.site-footer .wrap { display: flex; flex-direction: column; gap: 16px; }
.site-footer .foot-row { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px 24px; }
.site-footer .foot-links { display: flex; flex-wrap: wrap; gap: 20px; }
.site-footer a { color: var(--faint); }
.site-footer a:hover { color: var(--ink); }
.site-footer .legal { max-width: 80ch; line-height: 1.6; }

/* ---- notes: index ---- */
.notes-head { padding: clamp(3rem, 6vw, 5rem) 0 48px; }
.notes-intro { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 64px; align-items: end; }
.notes-intro h1 { font-size: clamp(2.2rem, 4vw, 3.5rem); line-height: 1.05; }
.notes-intro .lede { font-size: clamp(1.05rem, 1.5vw, 1.25rem); color: var(--ink-2); max-width: 40ch; margin-top: 20px; }
.why { border-left: 2px solid var(--brick); padding-left: 20px; display: flex; flex-direction: column; gap: 8px; }
.why p { font-size: 15px; color: var(--ink-2); }
.why .link { align-self: flex-start; margin-top: 4px; }
@media (max-width: 800px) { .notes-intro { grid-template-columns: 1fr; gap: 32px; } }

.filters { padding-bottom: 24px; }
.filters .rail { align-items: center; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
@media (max-width: 800px) {
  .chips { flex-wrap: nowrap; overflow-x: auto; margin-inline: calc(-1 * var(--gutter)); padding-inline: var(--gutter); scrollbar-width: none; }
  .chips::-webkit-scrollbar { display: none; }
  .chip { white-space: nowrap; flex: none; }
  .notes-head { padding-bottom: 28px; }
}
.chip { font-weight: 500; font-size: 13px; padding: 6px 12px; border: 1px solid rgba(23, 20, 15, 0.2); color: var(--ink-2); }
.chip:hover { border-color: var(--ink); color: var(--ink); }
.chip.on { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.entries { display: flex; flex-direction: column; padding-bottom: clamp(3rem, 6vw, 6rem); }
.entry {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  gap: var(--gap);
  padding: 32px 0;
  border-top: 1px solid var(--line);
}
.entry:last-child { border-bottom: 1px solid var(--line); }
.entry .meta time { font-family: var(--mono); letter-spacing: 0; text-transform: none; font-weight: 400; display: block; }
.entry .meta b { color: var(--brick); font-weight: 500; }
.entry h2 { font-size: 26px; line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 10px; max-width: 28ch; }
.entry h2 a:hover { color: var(--brick); }
.h1-tag { color: var(--brick); font-weight: 500; font-size: 0.55em; white-space: nowrap; }
.entry p { color: var(--ink-2); max-width: 66ch; }
@media (max-width: 800px) {
  .entry { grid-template-columns: 1fr; gap: 8px; padding: 24px 0; }
  .entry .meta { display: flex; flex-wrap: wrap; gap: 0 12px; align-items: baseline; }
  .entry .meta time { display: inline; }
  .entry .meta br { display: none; }
  .entry h2 { font-size: 22px; }
}

/* ---- notes: single ---- */
.note { padding: clamp(3rem, 6vw, 5rem) 0 clamp(3rem, 6vw, 6rem); }
.note-rail { position: sticky; top: 90px; font-size: 13px; line-height: 1.8; color: var(--muted); display: flex; flex-direction: column; gap: 16px; }
.note-rail time { font-family: var(--mono); display: block; color: var(--faint); }
.note-rail .tags { display: flex; flex-wrap: wrap; gap: 6px; }
.note-rail .tags a { font-size: 12px; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; color: var(--brick); }
.note-body { max-width: 72ch; }
.note-body h1 { font-size: clamp(2rem, 3.6vw, 3rem); line-height: 1.08; margin-bottom: 20px; text-wrap: balance; }
.note-body .summary { font-size: 1.2rem; color: var(--ink-2); margin-bottom: 40px; }
.prose { font-size: 17.5px; line-height: 1.7; }
.prose > * + * { margin-top: 1.2em; }
.prose h2 { font-size: 1.6rem; line-height: 1.2; margin-top: 2.2em; }
.prose h3 { font-size: 1.25rem; line-height: 1.3; margin-top: 1.8em; }
.prose a { color: var(--brick); border-bottom: 1px solid rgba(176, 31, 10, 0.3); }
.prose a:hover { border-color: var(--brick); }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: 0.35em; }
.prose blockquote { margin: 1.6em 0; padding-left: 20px; border-left: 2px solid var(--brick); color: var(--ink-2); }
.prose pre {
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.6;
  background: var(--paper-2);
  border: 1px solid var(--line);
  padding: 18px 20px;
  overflow-x: auto;
}
.prose code { font-family: var(--mono); font-size: 0.9em; background: var(--paper-2); padding: 0.1em 0.35em; }
.prose pre code { background: none; padding: 0; font-size: inherit; }
.prose img { max-width: 100%; height: auto; }
.prose table { border-collapse: collapse; width: 100%; font-size: 15px; }
.prose th, .prose td { text-align: left; padding: 8px 12px 8px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { font-weight: 600; }
.note-foot { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 8px 24px; }
@media (max-width: 800px) {
  .note-rail { position: static; flex-direction: row; flex-wrap: wrap; gap: 8px 20px; align-items: baseline; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
  .note-rail time { display: inline; margin-right: 8px; }
  .note-rail > div:last-child { display: none; }
  .note-body h1 { margin-top: 8px; }
  .note-body .summary { font-size: 1.1rem; margin-bottom: 28px; }
  .prose { font-size: 16.5px; }
}

/* ---- mobile tuning ---- */
@media (max-width: 600px) {
  body { font-size: 16.5px; }
  .site-header .wrap { height: 58px; }
  .brand { font-size: 19px; }
  .brand svg { width: 19px; height: 19px; }
  .btn { width: 100%; justify-content: center; }
  .cta-row { gap: 16px; }
  .lane-head { flex-direction: column; align-items: flex-start; gap: 6px; }
}