/* engineering-log.css
   Design system for the hi-fi "Engineering Log" homepage.
   Cool paper · deep navy ink · blue accent · dual light/dark theme · serif display + plex sans/mono.
*/

:root {
  --paper:        #f5f7fa;
  --paper-2:      #eaeff5;
  --paper-edge:   #dde5ef;
  --ink:          #0b1220;
  --ink-2:        #1b2536;
  --ink-soft:     #4a5568;
  --ink-mute:     #5b6b85;
  --rule:         rgba(11,18,32,.12);
  --rule-soft:    rgba(11,18,32,.06);
  --accent:       #0066cc;
  --accent-ink:   #0052a3;
  --accent-soft:  #dceafe;
  --accent-fg:    #ffffff;
  --slate:        #15233b;
  --slate-fg:     #eef3fa;
  --green:        #2f7a4a;
  --teal:         #1f6f7a;

  --serif:  "Instrument Serif", "Cormorant Garamond", Georgia, serif;
  --sans:   "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono:   "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* airy density — generous spacing */
  --shell-x:    96px;
  --shell-y:    96px;
  --section-y:  140px;
  --stack-lg:   48px;
  --stack-md:   28px;
  --stack-sm:   14px;
}

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

html, body {
  margin: 0; padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  font-weight: 400;
  font-feature-settings: "ss01", "cv01";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ── typography utilities ─────────────────────────────────── */

.serif       { font-family: var(--serif); font-weight: 400; letter-spacing: -0.005em; }
.serif-it    { font-family: var(--serif); font-weight: 400; font-style: italic; }
.mono        { font-family: var(--mono); }

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.eyebrow .dot { color: var(--accent); margin: 0 .35em; }

.h-mega {
  font-family: var(--serif);
  font-size: clamp(56px, 7vw, 120px);
  line-height: 0.95;
  letter-spacing: -0.018em;
  color: var(--ink);
  margin: 0;
}
.h-display {
  font-family: var(--serif);
  font-size: clamp(40px, 4.4vw, 72px);
  line-height: 0.98;
  letter-spacing: -0.012em;
  margin: 0;
}
.h-section {
  font-family: var(--serif);
  font-size: clamp(32px, 3.1vw, 52px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  margin: 0;
}
.h-card {
  font-family: var(--serif);
  font-size: 32px;
  line-height: 1.04;
  letter-spacing: -0.008em;
  margin: 0;
}
.h-small {
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.15;
  margin: 0;
}

.lead {
  font-size: 19px;
  line-height: 1.5;
  color: var(--ink-2);
  max-width: 56ch;
}
.body { font-size: 16px; line-height: 1.55; color: var(--ink-2); }
.muted { color: var(--ink-soft); }
.mark { color: var(--accent); }

/* ── shell + layout ───────────────────────────────────────── */

.shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--shell-x);
}

.section { padding-top: var(--section-y); padding-bottom: var(--section-y); }
.section + .section { padding-top: 0; }

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

/* ── top utility bar ──────────────────────────────────────── */

.util {
  border-bottom: 1px solid var(--rule);
  background: var(--paper-2);
}
.util-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px var(--shell-x);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--ink-soft);
}
.util-inner span + span { margin-left: 28px; }
.util-inner .live {
  display: inline-flex; align-items: center; gap: 6px; color: var(--ink);
}
.util-inner .live::before {
  content: ""; width: 6px; height: 6px; border-radius: 6px;
  background: var(--green);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}

/* ── nav ──────────────────────────────────────────────────── */

.nav {
  position: sticky; top: 0; z-index: 30;
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  border-bottom: 1px solid var(--rule);
}
.nav-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 18px var(--shell-x);
  gap: 32px;
}
.brand {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--mono); font-size: 13px; font-weight: 600;
  letter-spacing: .02em; color: var(--ink);
}
.brand .glyph {
  width: 28px; height: 28px;
  background: var(--ink); color: var(--paper);
  display: grid; place-items: center;
  font-family: var(--mono); font-weight: 600; font-size: 14px;
  letter-spacing: 0;
}
.brand .slash { color: var(--ink-mute); margin: 0 2px; }
.brand .light { color: var(--ink-soft); font-weight: 400; }

.nav-links {
  display: flex; gap: 32px; justify-content: center; align-items: center;
}
.nav-link {
  font-size: 14px;
  line-height: 1;
  color: var(--ink-2);
  position: relative;
  padding: 4px 0;
}
.nav-link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px;
  height: 1px; background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform .25s ease;
}
.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link .arrow { color: var(--ink-mute); margin-left: 6px; font-family: var(--mono); }

.nav-cta {
  justify-self: end;
  display: inline-flex; align-items: center; gap: 10px;
}

/* ── buttons ──────────────────────────────────────────────── */

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 20px;
  font-family: var(--sans); font-size: 14px; font-weight: 500;
  letter-spacing: .005em;
  color: var(--ink); background: transparent;
  border: 1px solid var(--ink);
  border-radius: 0;
  cursor: pointer;
  transition: background .18s ease, color .18s ease, border-color .18s ease, transform .12s ease;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn .glyph { font-family: var(--mono); font-size: 12px; }

.btn-primary {
  background: var(--accent); color: var(--accent-fg); border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); color: var(--accent-fg); }

.btn-ghost { border-color: var(--rule); }
.btn-ghost:hover { background: transparent; color: var(--ink); border-color: var(--ink); }

.btn-sm { padding: 8px 14px; font-size: 13px; }

/* ── chips, tags, kbd ─────────────────────────────────────── */

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  font-family: var(--mono); font-size: 10.5px;
  text-transform: uppercase; letter-spacing: .08em;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink-2);
}
.chip.is-accent { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.chip.is-fed    { background: var(--accent-soft); color: var(--accent-ink); border-color: transparent; }
.chip.is-ghost  { background: transparent; }

.tag {
  font-family: var(--mono); font-size: 10.5px;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent);
}

/* ── hero ─────────────────────────────────────────────────── */

.hero {
  padding: 88px 0 var(--section-y);
  border-bottom: 1px solid var(--rule);
}
.hero-band {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 24px; margin-bottom: 40px;
}
.hero h1 {
  margin: 0 0 36px;
  max-width: 18ch;
}
.hero h1 em {
  font-style: italic;
  color: var(--accent);
}
.hero h1 .alt {
  font-family: var(--sans);
  font-weight: 400;
  font-size: 0.66em;
  letter-spacing: -0.005em;
  color: var(--ink-soft);
  display: block;
  margin-top: 0.08em;
}
.hero-lead-row {
  display: grid;
  grid-template-columns: minmax(0, 56ch) auto;
  gap: 64px; align-items: end;
  margin-bottom: 64px;
}
.hero-cta { display: inline-flex; gap: 12px; align-items: center; }
.hero-cta .reply {
  font-family: var(--mono); font-size: 11px; color: var(--ink-soft);
  margin-left: 14px;
}
.hero-cta .reply b { color: var(--ink); font-weight: 500; }

/* visual block: terminal + system map */
.hero-visual {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 32px;
  align-items: stretch;
}
@media (max-width: 1100px) {
  .hero-visual { grid-template-columns: 1fr; }
}

/* terminal */
.term {
  background: var(--slate);
  color: var(--slate-fg);
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.65;
  padding: 24px 28px;
  min-height: 420px;
  display: flex; flex-direction: column;
  position: relative;
  overflow: hidden;
}
.term::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse at top left, rgba(255,255,255,.04), transparent 60%);
  pointer-events: none;
}
.term-bar {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 11px;
  color: color-mix(in srgb, var(--slate-fg) 50%, transparent);
  padding-bottom: 14px; margin-bottom: 14px;
  border-bottom: 1px solid color-mix(in srgb, var(--slate-fg) 10%, transparent);
}
.term-bar .dots { display: inline-flex; gap: 6px; margin-right: 8px; }
.term-bar .dots i { width: 9px; height: 9px; border-radius: 50%; display: block; }
.term-bar .dots i:nth-child(1) { background: #e96c5a; }
.term-bar .dots i:nth-child(2) { background: #e8c468; }
.term-bar .dots i:nth-child(3) { background: #7fb86a; }
.term-bar .path { color: color-mix(in srgb, var(--slate-fg) 80%, transparent); }
.term-line { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.term .t    { color: color-mix(in srgb, var(--slate-fg) 40%, transparent); }
.term .ok   { color: #9bbf86; }
.term .info { color: #7ec3ff; }
.term .warn { color: #ffd479; }
.term .err  { color: #ff8a6a; }
.term .dim  { color: color-mix(in srgb, var(--slate-fg) 55%, transparent); }
.term .em   { color: #f3ecd9; }
.term .blink { display: inline-block; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.term-foot {
  margin-top: auto; padding-top: 16px;
  border-top: 1px solid color-mix(in srgb, var(--slate-fg) 10%, transparent);
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--mono); font-size: 11px;
  color: color-mix(in srgb, var(--slate-fg) 50%, transparent);
}
.term-foot a { color: color-mix(in srgb, var(--slate-fg) 85%, transparent); border-bottom: 1px solid color-mix(in srgb, var(--slate-fg) 25%, transparent); }

/* system map */
.map {
  background: var(--paper);
  border: 1px solid var(--ink);
  padding: 28px 28px 24px;
  position: relative;
  min-height: 420px;
  display: flex; flex-direction: column;
}
.map-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 22px;
}
.map-head .ttl { font-family: var(--serif); font-size: 22px; }
.map-head .lbl { font-family: var(--mono); font-size: 10px; color: var(--ink-mute); letter-spacing: .14em; text-transform: uppercase; }
.map-grid {
  flex: 1; display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 1fr;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.map-cell {
  background: var(--paper);
  padding: 14px 12px;
  display: flex; flex-direction: column; justify-content: space-between;
  gap: 10px;
  min-height: 92px;
  position: relative;
}
.map-cell .k {
  font-family: var(--mono); font-size: 10px;
  color: var(--ink-mute);
  letter-spacing: .12em; text-transform: uppercase;
}
.map-cell .v { font-family: var(--serif); font-size: 19px; line-height: 1.1; }
.map-cell .meta { font-family: var(--mono); font-size: 10px; color: var(--ink-soft); }
.map-cell.is-accent {
  background: var(--accent); color: var(--accent-fg);
}
.map-cell.is-accent .k { color: rgba(255,255,255,.7); }
.map-cell.is-accent .meta { color: rgba(255,255,255,.78); }
.map-cell.is-dark {
  background: var(--slate); color: var(--slate-fg);
}
.map-cell.is-dark .k { color: color-mix(in srgb, var(--slate-fg) 55%, transparent); }
.map-cell.is-dark .meta { color: color-mix(in srgb, var(--slate-fg) 60%, transparent); }
.map-foot {
  margin-top: 16px;
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--mono); font-size: 11px; color: var(--ink-soft);
}

/* ── proof strip ──────────────────────────────────────────── */

.proof {
  display: grid; grid-template-columns: repeat(6, 1fr);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.proof-cell {
  padding: 36px 28px;
  border-right: 1px solid var(--rule);
}
.proof-cell:last-child { border-right: 0; }
.proof-cell .n { font-family: var(--serif); font-size: 56px; line-height: 1; letter-spacing: -0.02em; }
.proof-cell .l { font-family: var(--mono); font-size: 10.5px; color: var(--ink-soft); letter-spacing: .12em; text-transform: uppercase; margin-top: 10px; }
.proof-cell .h { font-family: var(--mono); font-size: 10.5px; color: var(--ink-mute); letter-spacing: .14em; text-transform: uppercase; margin-bottom: 14px; }
@media (max-width: 1100px) { .proof { grid-template-columns: repeat(3, 1fr); } .proof-cell:nth-child(3) { border-right: 0; } }

/* ── section heads ────────────────────────────────────────── */

.sec-head {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 64px;
  margin-bottom: var(--stack-lg);
}
.sec-head .meta { font-family: var(--mono); font-size: 11px; color: var(--ink-soft); letter-spacing: .14em; text-transform: uppercase; }
.sec-head .meta b { color: var(--ink); font-weight: 500; }
.sec-head .meta .num {
  font-family: var(--serif); font-size: 18px; letter-spacing: 0; color: var(--accent); display: block; margin-bottom: 6px; text-transform: none;
}
.sec-head .lede { max-width: 64ch; }
.sec-head h2 { margin-bottom: 16px; }
.sec-head h2 em { font-style: italic; color: var(--accent); }

/* ── dual track ───────────────────────────────────────────── */

.tracks {
  display: grid; grid-template-columns: 1fr 1fr;
  border: 1px solid var(--ink);
  background: var(--paper);
}
.track {
  padding: 56px 48px;
  position: relative;
}
.track + .track {
  border-left: 1px solid var(--ink);
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%);
}
.track .label {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 18px;
}
.track .label .tag { color: var(--accent); }
.track h3 { margin: 0 0 16px; }
.track .body { max-width: 44ch; margin-bottom: 28px; }
.track-meta {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  font-family: var(--mono); font-size: 11px; color: var(--ink-soft);
}
.track-meta div { padding: 12px 0; border-top: 1px solid var(--rule); }
.track-meta b { color: var(--ink); font-weight: 500; display: block; font-size: 13px; margin-bottom: 4px; font-family: var(--sans); }

.track-spine {
  position: absolute; top: -1px; left: 50%; transform: translateX(-50%);
  background: var(--paper); padding: 6px 14px;
  font-family: var(--mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-soft);
  border: 1px solid var(--ink);
}
@media (max-width: 1100px) {
  .tracks { grid-template-columns: 1fr; }
  .track + .track { border-left: 0; border-top: 1px solid var(--ink); }
}

/* ── services ─────────────────────────────────────────────── */

.services {
  display: grid; grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--ink);
}
.service {
  padding: 56px 0;
  border-bottom: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 24px;
}
.service:nth-child(odd)  { border-right: 1px solid var(--rule); padding-right: 56px; }
.service:nth-child(even) { padding-left: 56px; }
.service:nth-last-child(-n+2) { border-bottom: 1px solid var(--ink); }
.service .num {
  font-family: var(--serif); font-size: 56px; line-height: 1; color: var(--accent);
}
.service h3 { margin: 0 0 14px; }
.service .lede { font-size: 16px; color: var(--ink-2); margin: 0 0 22px; max-width: 48ch; }
.service ul.bullets {
  list-style: none; padding: 0; margin: 0 0 22px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 6px 22px;
}
.service ul.bullets li {
  display: grid; grid-template-columns: 14px 1fr; gap: 8px;
  font-size: 14px; color: var(--ink-2);
}
.service ul.bullets li::before { content: "—"; color: var(--accent); }
.service .deliv {
  padding: 14px 0 0;
  border-top: 1px dashed var(--rule);
  font-family: var(--mono); font-size: 12px; color: var(--ink-soft);
}
.service .deliv b { color: var(--ink); font-weight: 500; font-family: var(--sans); font-size: 13.5px; display: block; margin-bottom: 4px; }
@media (max-width: 1100px) {
  .services { grid-template-columns: 1fr; }
  .service { border-right: 0 !important; padding: 36px 0 !important; }
}

/* ── case study ───────────────────────────────────────────── */

.case {
  border: 1px solid var(--ink);
  background: var(--paper);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
}
.case-media {
  background: linear-gradient(135deg, var(--slate) 0%, color-mix(in srgb, var(--slate) 80%, var(--ink)) 100%);
  color: var(--slate-fg);
  padding: 40px 40px 0;
  position: relative;
  min-height: 460px;
  display: flex; flex-direction: column;
}
.case-media .meta {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-bottom: 18px;
}
.case-media .meta .chip { background: color-mix(in srgb, var(--slate-fg) 8%, transparent); border-color: color-mix(in srgb, var(--slate-fg) 18%, transparent); color: var(--slate-fg); }
.case-media .meta .chip.is-accent { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.case-media h3 { font-family: var(--serif); font-size: 36px; line-height: 1.05; margin: 0 0 12px; }
.case-media .body { color: color-mix(in srgb, var(--slate-fg) 70%, transparent); }

.case-mock {
  margin-top: auto; margin-bottom: -1px;
  border: 1px solid color-mix(in srgb, var(--slate-fg) 12%, transparent);
  border-bottom: 0;
  background: rgba(255,255,255,.03);
  font-family: var(--mono); font-size: 11px; color: color-mix(in srgb, var(--slate-fg) 70%, transparent);
  padding: 14px 18px 0;
}
.case-mock .row {
  display: grid; grid-template-columns: 90px 1fr 60px;
  gap: 14px; padding: 6px 0; align-items: center;
  border-bottom: 1px dashed color-mix(in srgb, var(--slate-fg) 8%, transparent);
}
.case-mock .row:last-child { border-bottom: 0; }
.case-mock .row .nm { color: var(--slate-fg); }
.case-mock .row .bar {
  height: 6px; background: color-mix(in srgb, var(--slate-fg) 8%, transparent); position: relative; overflow: hidden;
}
.case-mock .row .bar i { position: absolute; left: 0; top: 0; bottom: 0; background: var(--accent); }
.case-mock .row .v { text-align: right; color: var(--slate-fg); }
.case-mock .hd { color: color-mix(in srgb, var(--slate-fg) 40%, transparent); padding: 8px 0; letter-spacing: .12em; text-transform: uppercase; font-size: 10px; }

.case-body {
  padding: 40px 40px 32px;
  display: flex; flex-direction: column;
}
.case-body .label {
  font-family: var(--mono); font-size: 11px; color: var(--accent); letter-spacing: .14em; text-transform: uppercase;
  margin-bottom: 18px;
}
.case-body h4 { font-family: var(--serif); font-size: 28px; line-height: 1.1; margin: 0 0 14px; }
.case-body p { margin: 0 0 16px; font-size: 15.5px; line-height: 1.55; color: var(--ink-2); }

.case-stats {
  margin-top: auto;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--rule);
}
.case-stats div { padding: 18px 14px 0; border-right: 1px solid var(--rule); }
.case-stats div:last-child { border-right: 0; }
.case-stats .k { font-family: var(--mono); font-size: 10px; color: var(--ink-soft); letter-spacing: .12em; text-transform: uppercase; }
.case-stats .v { font-family: var(--serif); font-size: 28px; line-height: 1.1; margin-top: 6px; }
@media (max-width: 1100px) { .case { grid-template-columns: 1fr; } .case-stats { grid-template-columns: repeat(2, 1fr); } }

/* ── how we work ──────────────────────────────────────────── */

.workflow {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.stage {
  padding: 40px 32px 36px;
  border-right: 1px solid var(--rule);
  position: relative;
}
.stage:last-child { border-right: 0; }
.stage .wk {
  font-family: var(--mono); font-size: 11px; color: var(--accent);
  letter-spacing: .14em; text-transform: uppercase;
  margin-bottom: 22px;
  display: flex; align-items: center; gap: 10px;
}
.stage .wk::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
}
.stage h4 { font-family: var(--serif); font-size: 28px; line-height: 1.05; margin: 0 0 12px; }
.stage p { font-size: 14.5px; color: var(--ink-soft); margin: 0; }
.stage .num {
  position: absolute; top: 28px; right: 28px;
  font-family: var(--mono); font-size: 11px; color: var(--ink-mute);
}
@media (max-width: 1100px) { .workflow { grid-template-columns: 1fr 1fr; } }

/* ── won't take on ────────────────────────────────────────── */

.refuse {
  background: var(--slate); color: var(--slate-fg);
  padding: 88px 0;
}
.refuse .shell { display: grid; grid-template-columns: 380px 1fr; gap: 80px; align-items: start; }
.refuse h2 { color: var(--slate-fg); }
.refuse h2 em { color: var(--accent); font-style: italic; }
.refuse .lede { color: color-mix(in srgb, var(--slate-fg) 65%, transparent); }
.refuse ul {
  list-style: none; padding: 0; margin: 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  border-top: 1px solid color-mix(in srgb, var(--slate-fg) 16%, transparent);
}
.refuse li {
  padding: 16px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--slate-fg) 8%, transparent);
  display: grid; grid-template-columns: 28px 1fr;
  color: color-mix(in srgb, var(--slate-fg) 85%, transparent);
  font-size: 16px;
}
.refuse li:nth-child(odd)  { padding-right: 24px; border-right: 1px solid color-mix(in srgb, var(--slate-fg) 8%, transparent); }
.refuse li:nth-child(even) { padding-left: 24px; }
.refuse li::before {
  content: "×"; color: var(--accent); font-family: var(--mono); font-size: 18px; line-height: 1;
}
.refuse li s { text-decoration: line-through; text-decoration-color: color-mix(in srgb, var(--accent) 65%, transparent); text-decoration-thickness: 1.5px; }
.refuse .kicker {
  margin-top: 28px;
  font-family: var(--serif); font-size: 22px; line-height: 1.25;
  color: color-mix(in srgb, var(--slate-fg) 85%, transparent);
  max-width: 38ch;
}
.refuse .kicker em { color: var(--accent); font-style: italic; }
@media (max-width: 1100px) { .refuse .shell { grid-template-columns: 1fr; } .refuse ul { grid-template-columns: 1fr; } .refuse li { border-right: 0 !important; padding-left: 0 !important; padding-right: 0 !important; } }

/* ── writing + oss ────────────────────────────────────────── */

.publish { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; }
.pub-block { border-top: 1px solid var(--ink); padding-top: 28px; }
.pub-block .h { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 18px; }
.pub-block .h .t { font-family: var(--mono); font-size: 11px; color: var(--ink-soft); letter-spacing: .14em; text-transform: uppercase; }
.pub-block .h .more { font-family: var(--mono); font-size: 11px; color: var(--accent); }
.pub-item {
  padding: 18px 0;
  border-top: 1px dashed var(--rule);
  display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: baseline;
}
.pub-item:first-of-type { border-top: 0; }
.pub-item .t { font-family: var(--serif); font-size: 24px; line-height: 1.15; color: var(--ink); }
.pub-item .t .reading { color: var(--ink-mute); font-family: var(--mono); font-size: 11px; margin-left: 10px; }
.pub-item .d { font-family: var(--mono); font-size: 11px; color: var(--ink-mute); white-space: nowrap; }

.repo-row {
  padding: 14px 0;
  border-top: 1px dashed var(--rule);
  display: grid; grid-template-columns: 1.4fr 1fr auto; gap: 16px; align-items: baseline;
  font-family: var(--mono); font-size: 13px;
}
.repo-row:first-of-type { border-top: 0; }
.repo-row .nm { color: var(--ink); }
.repo-row .nm::before { content: "↳ "; color: var(--accent); }
.repo-row .kind { color: var(--ink-soft); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.repo-row .stars { color: var(--ink); }
@media (max-width: 1100px) { .publish { grid-template-columns: 1fr; } }

/* ── footer ───────────────────────────────────────────────── */

.foot {
  background: var(--ink); color: var(--paper);
}
.foot-cta {
  padding: 120px var(--shell-x) 100px;
  max-width: 1440px; margin: 0 auto;
  border-bottom: 1px solid color-mix(in srgb, var(--paper) 12%, transparent);
}
.foot-cta .eyebrow { color: color-mix(in srgb, var(--paper) 55%, transparent); margin-bottom: 22px; }
.foot-cta h2 {
  font-family: var(--serif);
  font-size: clamp(56px, 6.4vw, 112px);
  line-height: 0.95;
  letter-spacing: -0.016em;
  color: var(--paper); margin: 0 0 36px; max-width: 16ch;
}
.foot-cta h2 em { color: var(--accent); font-style: italic; }
.foot-cta .row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.foot-cta .btn { color: var(--paper); border-color: var(--paper); }
.foot-cta .btn:hover { background: var(--paper); color: var(--ink); }
.foot-cta .btn-primary { color: var(--accent-fg); border-color: var(--accent); background: var(--accent); }
.foot-cta .btn-primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); }
.foot-cta .email {
  margin-left: 12px;
  font-family: var(--mono); font-size: 13px;
  color: color-mix(in srgb, var(--paper) 65%, transparent);
}
.foot-cta .email b { color: var(--paper); border-bottom: 1px solid color-mix(in srgb, var(--paper) 40%, transparent); font-weight: 400; }

.foot-grid {
  padding: 64px var(--shell-x);
  max-width: 1440px; margin: 0 auto;
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 48px;
  font-family: var(--mono); font-size: 12px;
  color: color-mix(in srgb, var(--paper) 70%, transparent);
}
.foot-grid h5 { font-family: var(--mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: color-mix(in srgb, var(--paper) 50%, transparent); margin: 0 0 14px; font-weight: 500; }
.foot-grid a { display: block; padding: 5px 0; color: color-mix(in srgb, var(--paper) 80%, transparent); }
.foot-grid a:hover { color: var(--paper); }
.foot-grid .brand-blk { font-family: var(--serif); font-size: 28px; color: var(--paper); margin-bottom: 14px; line-height: 1.1; }
.foot-grid .legal { line-height: 1.6; font-size: 11.5px; }

.foot-bar {
  padding: 22px var(--shell-x);
  max-width: 1440px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  border-top: 1px solid color-mix(in srgb, var(--paper) 12%, transparent);
  font-family: var(--mono); font-size: 11px; color: color-mix(in srgb, var(--paper) 50%, transparent);
}

/* ── responsive ───────────────────────────────────────────── */

@media (max-width: 1100px) {
  :root { --shell-x: 40px; --section-y: 96px; }
  .sec-head { grid-template-columns: 1fr; gap: 24px; }
  .nav-inner { grid-template-columns: 1fr auto; }
  .nav-links { display: none; }
  .hero-lead-row { grid-template-columns: 1fr; gap: 28px; }
}

/* ── mobile (<=640px): tighter shell, single-column layouts,
       capped display type, 44px touch targets, 16px form inputs ── */
@media (max-width: 640px) {
  :root { --shell-x: 20px; --section-y: 56px; }

  /* nav — tighten padding + glyph */
  .nav-inner { padding: 12px var(--shell-x); gap: 16px; }
  .brand { font-size: 12px; gap: 10px; }
  .brand .glyph { width: 24px; height: 24px; font-size: 12px; }
  .nav-link { font-size: 14px; }

  /* hero — reduce top padding, tighten visual grid */
  .hero { padding: 56px 0 var(--section-y); }
  .hero h1 { margin-bottom: 24px; }
  .hero-band { margin-bottom: 28px; }
  .hero-lead-row { gap: 20px; margin-bottom: 40px; }
  .hero-visual { gap: 20px; }

  /* display type caps */
  .h-mega       { font-size: clamp(40px, 11vw, 64px); line-height: 0.98; }
  .h-display    { font-size: clamp(34px, 9vw, 52px); line-height: 1.0; }
  .h-section    { font-size: clamp(28px, 8vw, 40px); line-height: 1.05; }
  .h-card       { font-size: 26px; line-height: 1.1; }
  .h-small      { font-size: 19px; }
  .sec-head h2  { font-size: clamp(28px, 8vw, 40px); line-height: 1.05; }

  /* terminal + system map — variable height, less padding */
  .term { padding: 18px 18px; min-height: auto; font-size: 11.5px; }
  .map  { padding: 22px 18px; min-height: auto; }
  .map-grid { grid-template-columns: repeat(2, 1fr); }
  .map-cell { padding: 12px 10px; min-height: 80px; }

  /* proof strip — 2-col on mobile, no right borders */
  .proof { grid-template-columns: 1fr 1fr !important; }
  .proof-cell { padding: 20px 16px !important; border-right: 0 !important; }
  .proof-cell:nth-child(odd) { border-right: 1px solid var(--rule) !important; }
  .proof-cell .n { font-size: 40px; }

  /* services — single column, bullets stack, paddings shrink */
  .service { padding: 28px 0 !important; grid-template-columns: 1fr; gap: 16px; }
  .service:nth-child(odd)  { padding-right: 0 !important; }
  .service:nth-child(even) { padding-left: 0 !important; }
  .service .num { font-size: 44px; }
  .service ul.bullets { grid-template-columns: 1fr; gap: 4px; }

  /* case study */
  .case-media { padding: 28px 22px 0; min-height: auto; }
  .case-media h3 { font-size: 28px; }
  .case-body { padding: 28px 22px 24px; }
  .case-stats div { padding: 14px 12px 0; }

  /* workflow */
  .workflow { grid-template-columns: 1fr !important; }
  .stage { padding: 28px 20px; border-right: 0; border-bottom: 1px solid var(--rule); }

  /* tracks */
  .track { padding: 32px 22px; }

  /* won't take on */
  .refuse { padding: 56px 0; }
  .refuse .shell { gap: 32px; }

  /* publishing */
  .publish { gap: 32px; }
  .pub-item { grid-template-columns: 1fr; gap: 6px; }
  .pub-item .t { font-size: 20px; }
  .repo-row { grid-template-columns: 1fr auto; gap: 8px 14px; font-size: 12px; }
  .repo-row .kind { grid-column: 1 / -1; }

  /* buttons + chips — 44px touch target */
  .btn, .btn-sm { padding: 14px 22px; font-size: 14px; min-height: 44px; }
  .btn-sm { padding: 12px 18px; }

  /* footer */
  .foot-cta { padding: 64px var(--shell-x) 56px; }
  .foot-cta h2 { font-size: clamp(40px, 11vw, 72px); margin-bottom: 28px; }
  .foot-cta .row { gap: 12px; }
  .foot-grid { padding: 40px var(--shell-x); grid-template-columns: 1fr 1fr; gap: 32px 24px; }
  .foot-grid .brand-blk { font-size: 22px; }
  .foot-bar { padding: 18px var(--shell-x); flex-direction: column; gap: 8px; align-items: flex-start; }

  /* util bar — tighten */
  .util-inner { padding: 8px var(--shell-x); font-size: 10px; }
  .util-inner span + span { margin-left: 14px; }
}