/* Computationally Yours · Handbook
   Shared styles for every page under /SMI/Interim26/
   Palette follows ujjwalagarwal.com: De Stijl paper, black rules, three primaries. */

:root {
  --paper: #f2eee2;
  --paper-2: #e9e4d4;
  --ink: #111110;
  --ink-2: #57544c;
  --ink-3: #8a8679;
  --rule: #d5cfbf;
  --rule-ink: #111110;
  --m-red: #db261f;
  --m-yellow: #f4c20d;
  --m-blue: #2454c7;
  --accent: var(--m-red);
  --accent-soft: rgba(219, 38, 31, 0.08);
  --hatch: rgba(17, 17, 16, 0.07);

  --serif: "Fraunces", Georgia, serif;
  --sans: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;

  --gutter: clamp(16px, 4vw, 48px);
  --measure: 1180px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #131210;
    --paper-2: #1c1b18;
    --ink: #ece8dc;
    --ink-2: #a5a094;
    --ink-3: #777267;
    --rule: #2f2d28;
    --rule-ink: #ece8dc;
    --m-red: #e8443a;
    --m-yellow: #f2c42a;
    --m-blue: #4a76e0;
    --accent-soft: rgba(232, 68, 58, 0.1);
    --hatch: rgba(236, 232, 220, 0.06);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #131210;
  --paper-2: #1c1b18;
  --ink: #ece8dc;
  --ink-2: #a5a094;
  --ink-3: #777267;
  --rule: #2f2d28;
  --rule-ink: #ece8dc;
  --m-red: #e8443a;
  --m-yellow: #f2c42a;
  --m-blue: #4a76e0;
  --accent-soft: rgba(232, 68, 58, 0.1);
  --hatch: rgba(236, 232, 220, 0.06);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 16px/1.55 var(--sans);
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent); }
::selection { background: var(--m-yellow); color: #111110; }

/* ---------- mondrian ---------- */
[data-mondrian] { position: relative; overflow: hidden; }
[data-mondrian] svg { position: absolute; inset: 0; display: block; }
.mond-caption { font: 500 10.5px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); margin-top: 8px; }

/* ---------- frame ---------- */
.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 var(--gutter); }

.masthead {
  border-bottom: 2px solid var(--rule-ink);
  font: 500 12px/1 var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.masthead .wrap { display: flex; gap: 16px; justify-content: space-between; align-items: center; padding-top: 14px; padding-bottom: 14px; }
.masthead a { text-decoration: none; }
.masthead .brand { display: inline-flex; align-items: center; gap: 10px; }
.masthead .brand i { width: 14px; height: 14px; display: inline-block; }
.masthead nav { display: flex; gap: 20px; flex-wrap: wrap; }
.masthead nav a { color: var(--ink-2); }
.masthead nav a:hover, .masthead nav a[aria-current] { color: var(--ink); }
@media (max-width: 900px) {
  .masthead .wrap { flex-direction: column; align-items: flex-start; gap: 10px; }
  .masthead nav { gap: 6px 16px; }
}

.eyebrow {
  font: 500 12px/1.4 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-2);
}

/* ---------- hero ---------- */
.hero { padding: clamp(48px, 8vw, 104px) 0 clamp(40px, 6vw, 72px); border-bottom: 1px solid var(--rule); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(220px, 32%); gap: 24px clamp(32px, 5vw, 72px); align-items: stretch; }
.hero-art { min-height: 340px; height: 100%; }
.hero-art [data-mondrian] { height: 100%; min-height: 340px; }
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-art, .hero-art [data-mondrian] { min-height: 0; height: 96px; }
}
.hero h1 {
  font: 400 clamp(44px, 8vw, 104px)/0.95 var(--serif);
  letter-spacing: -0.02em;
  margin: 20px 0 28px;
}
.hero h1 em { font-style: italic; color: var(--accent); }
.lede { font: 400 clamp(19px, 2.1vw, 24px)/1.45 var(--sans); max-width: 40ch; margin: 0; }

/* Facts as an ID card: paper cells divided by black rules. */
.facts {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  background: var(--rule-ink);
  border: 2px solid var(--rule-ink);
  margin: clamp(36px, 5vw, 56px) 0 0;
}
.facts div { flex: 1 1 150px; background: var(--paper); padding: 14px 16px 14px; }
.facts dt { font: 500 11px/1.3 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); }
.facts dd { margin: 6px 0 0; font: 400 22px/1.2 var(--serif); }

/* ---------- sections ---------- */
.section {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 24px 40px;
  padding: clamp(48px, 7vw, 88px) 0;
  border-bottom: 1px solid var(--rule);
}
.section > .label { position: relative; }
.section > .label .sticky { position: sticky; top: 24px; }
.section > .label .num { font: 400 15px/1 var(--mono); color: var(--accent); }
.section > .label h2 { font: 400 34px/1.05 var(--serif); margin: 10px 0 0; letter-spacing: -0.01em; }
.section > .label .emblem { width: 96px; height: 96px; margin-top: 22px; }
.section > .body { min-width: 0; }
.section .intro { font-size: 19px; line-height: 1.5; max-width: 52ch; margin: 0 0 32px; }

@media (max-width: 860px) {
  .section { grid-template-columns: 1fr; gap: 16px; }
  .section > .label .sticky { position: static; display: grid; grid-template-columns: 1fr auto; align-items: end; column-gap: 16px; }
  .section > .label .sticky > .num, .section > .label .sticky > h2 { grid-column: 1; }
  .section > .label .sticky .emblem-wrap { grid-row: 1 / span 2; grid-column: 2; }
  .section > .label .emblem { width: 64px; height: 64px; margin-top: 0; }
}

.note { color: var(--ink-2); font-size: 14px; max-width: 60ch; }
.tag {
  display: inline-block;
  font: 500 10.5px/1 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 7px 4px;
  border: 1px solid currentColor;
  border-radius: 2px;
  vertical-align: 2px;
}
.tag.accent { color: var(--accent); }
.tag.solid { background: var(--accent); border-color: var(--accent); color: #fff; }

footer.colophon { font-size: 13px; color: var(--ink-2); }
footer.colophon .strip { height: 14px; }
footer.colophon .wrap.row { display: flex; flex-wrap: wrap; gap: 12px 32px; justify-content: space-between; padding-top: 28px; padding-bottom: 64px; }

code { font: 400 0.88em/1 var(--mono); background: var(--paper-2); padding: 2px 5px; border-radius: 3px; overflow-wrap: anywhere; }

/* ---------- tiered menu (assets/nav.js) ---------- */
.masthead .wrap { flex-direction: row !important; align-items: center !important; }
.hb-burger {
  display: inline-flex; align-items: center; gap: 10px; cursor: pointer;
  font: 500 12px/1 var(--mono); letter-spacing: .04em; text-transform: uppercase; color: var(--ink);
  background: transparent; border: 2px solid var(--rule-ink); border-radius: 0; padding: 8px 12px 8px 10px;
}
.hb-burger:hover { background: var(--ink); color: var(--paper); }
.hb-bars { display: grid; gap: 3px; width: 16px; }
.hb-bars i { display: block; height: 2px; background: currentColor; }
.hb-bars i:nth-child(2) { width: 62%; }
.hb-bars i:nth-child(3) { width: 38%; background: var(--m-red); }

.hb-scrim { position: fixed; inset: 0; z-index: 40; background: rgba(17,17,16,.32); opacity: 0; pointer-events: none; transition: opacity .25s ease; }
.hb-drawer {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 41; width: min(440px, 100vw);
  background: var(--paper); border-left: 2px solid var(--rule-ink); overflow-y: auto; overscroll-behavior: contain;
  transform: translateX(102%); transition: transform .32s cubic-bezier(.2,.7,.2,1); visibility: hidden;
  display: flex; flex-direction: column;
}
.hb-open .hb-scrim { opacity: 1; pointer-events: auto; }
.hb-open .hb-drawer { transform: none; visibility: visible; }
.hb-open, .hb-open body { overflow: hidden; }
@media (prefers-reduced-motion: reduce) { .hb-scrim, .hb-drawer { transition: none; } }

.hb-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 20px; border-bottom: 2px solid var(--rule-ink); }
.hb-kicker { font: 500 11px/1.3 var(--mono); letter-spacing: .05em; text-transform: uppercase; color: var(--ink-2); }
.hb-close { width: 34px; height: 34px; border: 2px solid var(--rule-ink); background: transparent; color: var(--ink); font: 400 22px/1 var(--sans); cursor: pointer; display: grid; place-items: center; padding: 0; }
.hb-close:hover { background: var(--ink); color: var(--paper); }
.hb-strip { height: 22px; flex: none; border-bottom: 2px solid var(--rule-ink); }

.hb-pages { list-style: none; margin: 0; padding: 0; }
.hb-pages > li { border-bottom: 1px solid var(--rule); }
.hb-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: stretch; }
.hb-page { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 10px; align-items: baseline; padding: 16px 8px 16px 20px; text-decoration: none; }
.hb-n { font: 500 12px/1 var(--mono); color: var(--ink-3); }
.hb-t { font: 400 21px/1.2 var(--serif); }
.hb-page:hover .hb-t { color: var(--accent); }
.is-current .hb-n { color: var(--accent); }
.is-current > .hb-row { box-shadow: inset 4px 0 0 var(--m-red); }
.hb-toggle { width: 52px; border: 0; border-left: 1px solid var(--rule); background: transparent; cursor: pointer; display: grid; place-items: center; color: var(--ink); }
.hb-toggle:hover { background: var(--paper-2); }
.hb-toggle span { position: relative; width: 12px; height: 12px; }
.hb-toggle span::before, .hb-toggle span::after { content: ""; position: absolute; left: 0; right: 0; top: 5px; height: 2px; background: currentColor; transition: transform .2s ease; }
.hb-toggle span::after { transform: rotate(90deg); }
.is-open .hb-toggle span::after { transform: rotate(0); }

.hb-sections { list-style: none; margin: 0; padding: 0 0 12px 64px; display: none; }
.is-open > .hb-sections { display: block; }
.hb-sections a { display: block; padding: 6px 20px 6px 0; font: 500 11.5px/1.35 var(--mono); letter-spacing: .03em; text-transform: uppercase; color: var(--ink-2); text-decoration: none; }
.hb-sections a:hover { color: var(--accent); }

.hb-all { margin-top: auto; display: block; padding: 18px 20px; border-top: 2px solid var(--rule-ink); font: 500 12px/1 var(--mono); letter-spacing: .04em; text-transform: uppercase; text-decoration: none; }
.hb-all:hover { background: var(--ink); color: var(--paper); }
@media print { .hb-burger, .hb-drawer, .hb-scrim { display: none !important; } }

/* ---------- shared kit (assets/kit.js) ---------- */
.kit-steps { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); counter-reset: s; }
.kit-steps > li { counter-increment: s; display: grid; grid-template-columns: 56px minmax(0, 1fr); gap: 4px 16px; padding: 16px 0; border-bottom: 1px solid var(--rule); }
.kit-steps > li::before { content: counter(s, decimal-leading-zero); font: 400 15px/1.5 var(--mono); color: var(--accent); }
.kit-steps b { font-weight: 600; }
.kit-steps p { margin: 4px 0 0; color: var(--ink-2); font-size: 15px; }

.kit-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.kit-list > li { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--rule); font-size: 16px; }
.kit-list > li > i { width: 12px; height: 12px; margin-top: 6px; display: block; outline: 2px solid var(--rule-ink); background: var(--paper); }
.kit-list > li > i.r { background: var(--m-red); } .kit-list > li > i.y { background: var(--m-yellow); } .kit-list > li > i.b { background: var(--m-blue); }
.kit-list b { font-weight: 600; }
.kit-list span { color: var(--ink-2); }
.kit-list span b { color: var(--ink); }

.kit-cells { display: grid; grid-template-columns: repeat(var(--cols, 2), minmax(0, 1fr)); gap: 2px; background: var(--rule-ink); border: 2px solid var(--rule-ink); margin: 0 0 24px; }
.kit-cells > div { background: var(--paper); padding: 16px 18px 18px; min-width: 0; }
.kit-cells > div.span { grid-column: 1 / -1; }
.kit-cells .k { font: 500 11px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); display: flex; gap: 8px; align-items: center; margin: 0 0 8px; }
.kit-cells .k i { width: 10px; height: 10px; display: inline-block; outline: 2px solid var(--rule-ink); }
.kit-cells h3 { font: 400 22px/1.15 var(--serif); margin: 0 0 6px; }
.kit-cells p { margin: 0; font-size: 15px; color: var(--ink-2); }
.kit-cells p + p { margin-top: 8px; }
.kit-cells ul, .kit-cells ol { margin: 0; padding-left: 1.2em; font-size: 15px; color: var(--ink-2); }
.kit-cells li + li { margin-top: 4px; }
@media (max-width: 860px) { .kit-cells { --cols: 2 !important; } .kit-cells > div:last-child:nth-child(odd) { grid-column: 1 / -1; } }
@media (max-width: 560px) { .kit-cells { grid-template-columns: 1fr; } }

.kit-table { width: 100%; border-collapse: collapse; border-top: 1px solid var(--ink); margin: 0 0 20px; font-size: 15px; }
.kit-table th, .kit-table td { text-align: left; padding: 11px 14px 11px 0; border-bottom: 1px solid var(--rule); vertical-align: top; }
.kit-table thead th { font: 500 11px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
.kit-table tbody th { font: 400 18px/1.25 var(--serif); font-weight: 400; }
.kit-table td { color: var(--ink-2); }
.kit-table .num { font: 500 13px/1.5 var(--mono); color: var(--accent); white-space: nowrap; }
.kit-scroll { overflow-x: auto; }
@media (max-width: 640px) {
  .kit-table.stack thead { display: none; }
  .kit-table.stack tr { display: block; padding: 10px 0; border-bottom: 1px solid var(--rule); }
  .kit-table.stack th, .kit-table.stack td { display: block; border: 0; padding: 3px 0; }
  .kit-table.stack td[data-h]::before { content: attr(data-h); display: block; font: 500 10.5px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); margin-top: 6px; }
}

.kit-tpl { position: relative; margin: 0 0 20px; }
.kit-tpl pre { margin: 0; padding: 20px 22px; padding-right: 84px; background: var(--paper-2); border: 1px solid var(--rule); font: 400 13.5px/1.65 var(--mono); white-space: pre-wrap; word-break: break-word; }
.kit-tpl .kit-btn { position: absolute; top: 10px; right: 10px; }
.kit-tpl .cap { font: 500 11px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 8px; }
.kit-btn {
  font: 500 10.5px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase;
  background: var(--paper); color: var(--ink); border: 1px solid var(--ink); border-radius: 2px; padding: 8px 10px 7px; cursor: pointer;
}
.kit-btn:hover { background: var(--ink); color: var(--paper); }
.kit-btn.primary { background: var(--ink); color: var(--paper); }
.kit-btn.primary:hover { background: var(--accent); border-color: var(--accent); }
.kit-cmd { display: block; margin-top: 8px; padding: 10px 14px; background: var(--paper-2); border-left: 3px solid var(--rule-ink); font: 400 13.5px/1.55 var(--mono); white-space: pre-wrap; word-break: break-word; }

.kit-checks { margin: 0 0 8px; border-top: 1px solid var(--ink); }
.kit-checks h3 { font: 500 11px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); margin: 18px 0 4px; }
.kit-checks label { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--rule); font-size: 16px; cursor: pointer; }
.kit-checks label small { display: block; color: var(--ink-2); font-size: 14px; margin-top: 2px; }
.kit-checks input { accent-color: var(--m-red); width: 16px; height: 16px; margin: 3px 0 0; }
.kit-checks label:has(input:checked) > span { color: var(--ink-3); text-decoration: line-through; text-decoration-color: var(--m-red); }
.kit-progress { display: flex; align-items: center; gap: 12px; margin: 0 0 16px; font: 500 11px/1 var(--mono); letter-spacing: .05em; text-transform: uppercase; color: var(--ink-2); }
.kit-progress .bar { flex: 1; height: 8px; outline: 2px solid var(--rule-ink); background: var(--paper); position: relative; overflow: hidden; }
.kit-progress .bar i { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--m-red); transition: width .3s ease; }
.kit-progress.done .bar i { background: var(--m-blue); }

.kit-rubric { width: 100%; border-collapse: collapse; border: 2px solid var(--rule-ink); margin: 0 0 24px; font-size: 14px; table-layout: fixed; }
.kit-rubric th, .kit-rubric td { border: 1px solid var(--rule-ink); padding: 10px 12px; vertical-align: top; text-align: left; }
.kit-rubric thead th { font: 500 10.5px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase; background: var(--paper-2); }
.kit-rubric thead th:nth-child(2) { box-shadow: inset 0 -3px 0 var(--m-blue); }
.kit-rubric thead th:nth-child(3) { box-shadow: inset 0 -3px 0 var(--m-yellow); }
.kit-rubric thead th:nth-child(4) { box-shadow: inset 0 -3px 0 var(--m-red); }
.kit-rubric tbody th { font: 400 17px/1.25 var(--serif); font-weight: 400; width: 22%; }
.kit-rubric tbody th small { display: block; font: 500 10.5px/1.4 var(--mono); letter-spacing: .05em; text-transform: uppercase; color: var(--accent); margin-top: 6px; }
.kit-rubric td { color: var(--ink-2); }
@media (max-width: 760px) {
  .kit-rubric, .kit-rubric tbody, .kit-rubric tr, .kit-rubric th, .kit-rubric td { display: block; width: 100% !important; }
  .kit-rubric thead { display: none; }
  .kit-rubric tr { border-bottom: 2px solid var(--rule-ink); }
  .kit-rubric th, .kit-rubric td { border: 0; border-bottom: 1px solid var(--rule); }
  .kit-rubric td::before { content: attr(data-h); display: block; font: 500 10.5px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 4px; }
}

.kit-example { border: 2px solid var(--rule-ink); margin: 0 0 20px; }
.kit-example > header { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; align-items: baseline; padding: 14px 20px; border-bottom: 2px solid var(--rule-ink); }
.kit-example > header h3 { font: 400 24px/1.1 var(--serif); margin: 0; }
.kit-example > .text { padding: 18px 20px 6px; font: 400 18px/1.55 var(--serif); }
.kit-example > .text p { margin: 0 0 12px; }
.kit-example > footer { padding: 10px 20px; border-top: 1px solid var(--rule); font: 500 11px/1.4 var(--mono); letter-spacing: .05em; text-transform: uppercase; color: var(--ink-3); }

.kit-tree { font: 400 13.5px/1.75 var(--mono); padding: 18px 22px; border-left: 3px solid var(--rule-ink); background: var(--paper-2); margin: 0 0 20px; white-space: pre; overflow-x: auto; }
.kit-tree em { font-style: normal; color: var(--accent); }
.kit-tree span { color: var(--ink-3); }

.kit-timeline { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.kit-timeline > li { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 4px 24px; padding: 14px 0; border-bottom: 1px solid var(--rule); }
.kit-timeline .t { font: 500 12px/1.6 var(--mono); color: var(--accent); }
.kit-timeline b { font-weight: 600; }
.kit-timeline p { margin: 2px 0 0; color: var(--ink-2); font-size: 15px; }
@media (max-width: 560px) { .kit-timeline > li { grid-template-columns: 1fr; } }

.kit-warn { border: 2px solid var(--m-red); padding: 14px 18px; margin: 0 0 20px; font-size: 15px; }
.kit-warn b { color: var(--accent); font: 500 11px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase; display: block; margin-bottom: 6px; }
.kit-pending { font: 500 10.5px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--accent); border: 1px dashed var(--accent); padding: 3px 6px 2px; border-radius: 2px; white-space: nowrap; }

@media print {
  .kit-btn, .kit-progress .bar { display: none !important; }
  .kit-cells, .kit-rubric, .kit-example { break-inside: avoid; }
}