/* ============================================================
   Mindwire — engineering specification.
   Paper · ink · navy.
   ============================================================ */

:root {
  --paper:        #efeae0;
  --paper-2:      #e8e1d2;
  --ink:          #131316;
  --ink-2:        #2e2e33;
  --ink-3:        #555560;
  --ink-dim:      #76767f;
  --ink-faint:    #a59c89;
  --rule:         #cfc7b5;
  --rule-strong:  #131316;
  --signal:       #0a2540;
  --signal-fg:    #ffffff;

  --sans:    "Inter Tight", "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --display: "Inter Tight", "Inter", system-ui, sans-serif;

  --bar-h: 48px;
}

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

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15.5px;
  font-weight: 400;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11", "tnum";
}

html {
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
}

body {
  min-height: 100vh;
  background-color: var(--paper);
  background-image:
    radial-gradient(1000px 700px at 100% -10%, rgba(10, 37, 64, 0.04), transparent 55%),
    radial-gradient(800px 600px at -10% 110%, rgba(19, 19, 22, 0.04), transparent 60%);
}

::selection { background: var(--signal); color: var(--paper); }

a { color: inherit; text-decoration: none; }

/* ============================================================
   Top status bar
   ============================================================ */
.bar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(20px, 3.6vw, 48px);
  height: var(--bar-h);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}
.bar .left  { display: flex; align-items: center; gap: 14px; }
.bar .right {
  display: flex; align-items: center; gap: 18px;
  justify-content: flex-end;
  color: var(--ink-dim);
}
.bar .right .blink {
  width: 6px; height: 6px;
  background: var(--signal);
  border-radius: 50%;
  animation: blink 2.4s ease-in-out infinite;
}
@keyframes blink { 0%,100% { opacity: 1 } 50% { opacity: .3 } }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.32em;
  color: var(--ink);
}
.brand .mark {
  width: 16px; height: 16px;
  border: 1.5px solid var(--ink);
  display: inline-grid;
  place-items: center;
  flex: 0 0 16px;
}
.brand .mark svg {
  width: 14px;
  height: 14px;
  display: block;
  color: var(--ink);
  fill: var(--ink);
  overflow: visible;
}

.bar nav { display: flex; gap: 28px; }
.bar nav a {
  color: var(--ink-dim);
  position: relative;
  padding: 4px 0;
  transition: color 160ms ease;
}
.bar nav a:hover { color: var(--ink); }
.bar nav a.active { color: var(--ink); }
.bar nav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--signal);
}

@media (max-width: 760px) {
  :root { --bar-h: 44px; }
  .bar-inner { grid-template-columns: auto 1fr; gap: 14px; padding: 0 18px; }
  .bar .right { display: none; }
  .bar nav { justify-content: flex-end; gap: 18px; font-size: 10px; letter-spacing: 0.12em; }
  .brand { gap: 9px; font-size: 10px; letter-spacing: 0.22em; }
  .brand .mark { width: 14px; height: 14px; flex-basis: 14px; }
  .brand .mark svg { width: 12px; height: 12px; }
}
@media (max-width: 380px) {
  .brand .full { display: none; }
  .brand::after { content: "MW"; font-weight: 600; letter-spacing: 0.2em; }
}

/* ============================================================
   Document grid
   ============================================================ */
.doc {
  max-width: 1280px;
  margin: 0 auto;
  padding: clamp(28px, 5vw, 64px) clamp(20px, 3.6vw, 48px) 0;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: clamp(24px, 5vw, 80px);
  position: relative;
}

@media (max-width: 920px) {
  .doc { grid-template-columns: 1fr; gap: 28px; }
}

/* Prevent code blocks / wide content from stretching the grid track on mobile */
.doc > section { min-width: 0; }

/* Sticky left meta rail */
.rail {
  position: sticky;
  top: calc(var(--bar-h) + 24px);
  align-self: start;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.rail .blk { display: flex; flex-direction: column; gap: 4px; }
.rail .blk .k { color: var(--ink-faint); }
.rail .blk .v { color: var(--ink-2); }
.rail .blk .v.signal { color: var(--signal); }
.rail .sig {
  margin-top: 12px;
  font-family: var(--display);
  font-size: 10.5px;
  letter-spacing: 0.32em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

@media (max-width: 920px) {
  /* Rail is just noise on mobile — desktop-only metadata column. */
  .rail { display: none; }
}

/* Section header */
.sect-h {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--rule-strong);
  padding-top: 14px;
  margin: clamp(48px, 8vw, 96px) 0 28px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.sect-h .num { color: var(--signal); margin-right: 14px; }
.sect-h .meta { color: var(--ink-dim); }

/* ============================================================
   Hero
   ============================================================ */
.hero { padding-top: 8px; }

.hero .ref {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  border-top: 1px solid var(--rule-strong);
  padding-top: 12px;
  margin-bottom: clamp(40px, 8vw, 88px);
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.hero .ref .signal { color: var(--signal); }

.hero h1 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(44px, 8.4vw, 112px);
  line-height: 0.96;
  letter-spacing: -0.045em;
  margin: 0 0 36px;
  color: var(--ink);
}
.hero h1 .l1 { display: block; }
.hero h1 .l2 { display: block; padding-left: clamp(0px, 6vw, 96px); }
.hero h1 .l3 { display: block; }
.hero h1 .l3::after {
  content: "";
  display: inline-block;
  width: 0.45em;
  height: 0.45em;
  background: var(--signal);
  margin-left: 0.18em;
  vertical-align: 0.16em;
}

.hero .lede {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(18px, 1.55vw, 22px);
  line-height: 1.45;
  letter-spacing: -0.012em;
  color: var(--ink-2);
  max-width: 60ch;
  margin: 0 0 clamp(40px, 6vw, 64px);
}

/* Specifications block */
.specs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.specs > div {
  padding: 20px 22px;
  border-right: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.specs > div:last-child { border-right: 0; }
.specs .k { color: var(--ink-faint); display: block; margin-bottom: 8px; font-size: 10.5px; }
.specs .v { color: var(--ink); font-weight: 500; }
@media (max-width: 760px) {
  .specs { grid-template-columns: repeat(2, 1fr); }
  .specs > div:nth-child(2n) { border-right: 0; }
  .specs > div:nth-child(-n+2) { border-bottom: 1px solid var(--rule); }
}

/* ============================================================
   Index of writing
   ============================================================ */
.entries { display: grid; gap: 0; }

.entry {
  display: grid;
  grid-template-columns: 36px 130px 1fr 64px;
  align-items: baseline;
  gap: clamp(10px, 2vw, 28px);
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
  position: relative;
  transition: background 200ms ease;
}
.entry::before {
  content: "";
  position: absolute;
  left: -8px; right: -8px;
  top: 0; bottom: 0;
  background: var(--signal);
  opacity: 0;
  transition: opacity 180ms ease;
  z-index: -1;
  mix-blend-mode: multiply;
  border-radius: 2px;
}
.entry:hover::before { opacity: 0.06; }
.entry:hover .e-num,
.entry:hover .e-title { color: var(--signal); }
.entry .e-num,
.entry .e-date,
.entry .e-read {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.entry .e-num { color: var(--ink-faint); }
.entry .e-title {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(17px, 1.55vw, 21px);
  letter-spacing: -0.018em;
  line-height: 1.3;
  color: var(--ink);
  transition: color 180ms ease;
}
.entry .e-read { text-align: right; color: var(--ink-faint); }

@media (max-width: 760px) {
  .entry { grid-template-columns: 36px 1fr; gap: 10px 14px; padding: 18px 0; }
  .entry .e-date  { grid-column: 2; order: 1; }
  .entry .e-title { grid-column: 2; order: 2; }
  .entry .e-read  { grid-column: 2; order: 3; text-align: left; }
}

/* ============================================================
   Article (post) page
   ============================================================ */
.article { max-width: 680px; }
.article .ref {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  border-top: 1px solid var(--rule-strong);
  padding-top: 12px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
}
.article .ref .signal { color: var(--signal); }

.back {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 36px;
  transition: color 160ms ease, gap 200ms ease;
}
.back:hover { color: var(--signal); gap: 12px; }

.article h1 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(34px, 5.4vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin: 0 0 36px;
  color: var(--ink);
}

.article p, .article ul, .article ol {
  font-family: var(--sans);
  font-size: 17.5px;
  line-height: 1.65;
  color: var(--ink-2);
  margin: 0 0 1.15em;
}
.article h2 {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--signal);
  margin: 2.6em 0 0.9em;
  font-weight: 500;
}
.article a { color: var(--ink); border-bottom: 1px solid var(--signal); }
.article a:hover { color: var(--signal); }
.article ul, .article ol { padding-left: 1.5em; margin: 0 0 1.25em; }
.article li { margin-bottom: 0.45em; }
.article strong { color: var(--ink); font-weight: 600; }
.article em { font-style: italic; color: var(--ink-2); }
.article p code, .article li code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--paper-2);
  padding: 1px 6px;
  border-radius: 2px;
  color: var(--ink);
  border: 1px solid var(--rule);
}
.article pre {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 16px 18px;
  margin: 0 0 1.4em;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink);
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
@media (max-width: 760px) {
  .article pre { font-size: 12px; padding: 12px 14px; }
}
.article pre code {
  font-family: inherit;
  font-size: inherit;
  background: none;
  padding: 0;
  border: 0;
  color: inherit;
}

.article .stub {
  border-top: 1px solid var(--rule);
  padding-top: 20px;
  margin-top: 48px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.article .stub .signal { color: var(--signal); }

/* ============================================================
   Prose pages (about / privacy)
   ============================================================ */
.prose { max-width: 680px; }
.prose .ref {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  border-top: 1px solid var(--rule-strong);
  padding-top: 12px;
  margin-bottom: 32px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.prose .ref .signal { color: var(--signal); }
.prose h1 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(40px, 6.4vw, 76px);
  line-height: 1.0;
  letter-spacing: -0.035em;
  margin: 0 0 40px;
}
.prose p, .prose li {
  font-family: var(--sans);
  font-size: 17.5px;
  line-height: 1.65;
  color: var(--ink-2);
}
.prose h2 {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--signal);
  margin: 2.8em 0 0.9em;
  font-weight: 500;
}
.prose a { color: var(--ink); border-bottom: 1px solid var(--signal); }
.prose a:hover { color: var(--signal); }

/* ============================================================
   Footer
   ============================================================ */
.foot {
  margin-top: clamp(80px, 14vw, 160px);
  border-top: 1px solid var(--rule-strong);
  padding: 18px 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  flex-wrap: wrap;
}
.foot a { color: var(--ink-2); transition: color 160ms ease; }
.foot a:hover { color: var(--signal); }

/* ============================================================
   Reveal-on-scroll
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 500ms ease, transform 500ms cubic-bezier(.2, .7, .2, 1);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   Subtle decals — crop marks, progress, footer barcode
   ============================================================ */

/* Printer's registration ticks at viewport corners */
.crop {
  position: fixed;
  width: 14px;
  height: 14px;
  z-index: 60;
  pointer-events: none;
  color: var(--ink);
  opacity: 0.55;
}
.crop.tl { top: 12px;    left: 12px;    }
.crop.tr { top: 12px;    right: 12px;   }
.crop.bl { bottom: 12px; left: 12px;    }
.crop.br { bottom: 12px; right: 12px;   }
.crop::before, .crop::after { content: ""; position: absolute; background: currentColor; }
.crop::before { width: 1px; height: 14px; }
.crop::after  { width: 14px; height: 1px; }
.crop.tl::before, .crop.tl::after { left: 0; top: 0; }
.crop.tr::before, .crop.tr::after { right: 0; top: 0; }
.crop.bl::before, .crop.bl::after { left: 0; bottom: 0; }
.crop.br::before, .crop.br::after { right: 0; bottom: 0; }
@media (max-width: 760px) { .crop { width: 10px; height: 10px; opacity: 0.45; } .crop::before { height: 10px; } .crop::after { width: 10px; } }

/* Scroll progress hairline in the bar */
.bar { position: sticky; }
.bar .progress {
  position: absolute;
  left: 0; bottom: -1px; height: 2px;
  background: var(--signal);
  width: 0;
  transition: width 80ms linear;
}

/* Footer barcode + folio — small touch, replaces flat single-line foot */
.foot.foot-print {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: end;
}
.foot.foot-print .colophon {
  grid-column: 1 / -1;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--rule);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  text-align: center;
}
.foot .folio {
  font-variant-numeric: tabular-nums;
  color: var(--ink-2);
}
.barcode {
  display: inline-flex;
  align-items: flex-end;
  gap: 8px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.barcode .bars {
  display: inline-flex;
  align-items: flex-end;
  gap: 1.5px;
  height: 18px;
}
.barcode .bars i {
  display: inline-block;
  width: 1.5px; height: 100%;
  background: var(--ink);
}
.barcode .bars i.t { width: 2.5px; }
.barcode .bars i.s { height: 70%; }
.barcode .bars i.x { height: 50%; }
.barcode .bars i.w { width: 3px; }
.barcode .ref { padding-bottom: 1px; color: var(--ink-dim); }
.barcode .ref .signal { color: var(--signal); }

@media (max-width: 760px) {
  .foot.foot-print { grid-template-columns: 1fr; }
  .foot.foot-print .folio { text-align: left; }
}