/* ezekias.dev: shared design system, "the probe".
   Everything is drawn in graphite on paper, like a schematic. One colour, probe blue, marks what changes
   or what is active, and nothing else. Red appears only for what was removed, inside diagrams.
   Familjen Grotesk for headings, diagrams and interface; Literata for reading. */

/* Self-hosted fonts (latin subset): no third-party connection before the first paint. */
@font-face { font-family: "Familjen Grotesk"; font-style: normal; font-weight: 400 700; font-display: swap; src: url("/assets/fonts/familjen-grotesk-latin.woff2?v=c5d0fcda") format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Literata"; font-style: normal; font-weight: 300 700; font-display: swap; src: url("/assets/fonts/literata-latin.woff2?v=0654051d") format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Literata"; font-style: italic; font-weight: 400; font-display: swap; src: url("/assets/fonts/literata-italic-latin.woff2?v=f39f730d") format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }

:root {
  --paper: #F4F5F1;
  --paper-2: #EBEDE7;
  --card: #FAFBF8;
  --ink: #18191B;
  --muted: #5E6266;
  --rule: #D3D6D0;
  --probe: #1F4FE0;
  --red: #C2381F;
  --amber: #A25F00;
  /* legacy accent names now resolve to graphite: colour is reserved for change */
  --copper: var(--ink);
  --teal: var(--ink);
  --display: "Familjen Grotesk", "Helvetica Neue", Arial, sans-serif;
  --body: "Literata", Georgia, "Times New Roman", serif;
  --mono: "Familjen Grotesk", "Helvetica Neue", Arial, sans-serif;
  --code: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --gutter: max(16px, env(safe-area-inset-left, 0px));
  --gutter-r: max(16px, env(safe-area-inset-right, 0px));
  --header-h: 3.6rem;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #15171A; --paper-2: #1C1F23; --card: #1A1C20; --ink: #ECEDEA; --muted: #9A9EA3; --rule: #2C2F33;
    --probe: #7C9BFF; --red: #F07A63; --amber: #E0A84A; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #15171A; --paper-2: #1C1F23; --card: #1A1C20; --ink: #ECEDEA; --muted: #9A9EA3; --rule: #2C2F33;
  --probe: #7C9BFF; --red: #F07A63; --amber: #E0A84A; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + 1rem); }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.68;
  font-variant-numeric: tabular-nums;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-color: var(--rule); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--probe); text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--probe); outline-offset: 3px; border-radius: 2px; }
code { font-family: var(--code); font-size: 0.82em; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 1rem; top: 1rem; z-index: 100; background: var(--card); padding: 0.5rem 0.75rem; }

.container { max-width: 72rem; margin: 0 auto; padding-left: var(--gutter); padding-right: var(--gutter-r); }
.narrow { max-width: 46rem; }

/* Type */
.eyebrow { font-family: var(--display); font-size: 0.95rem; color: var(--muted); margin: 0; }
.section-head .eyebrow { display: none; }
h1, h2, h3 { font-family: var(--display); text-wrap: balance; margin: 0; letter-spacing: -0.01em; }
h1 { font-weight: 640; font-size: clamp(2.25rem, 1.3rem + 3.6vw, 3.75rem); line-height: 1.04; letter-spacing: -0.025em; }
h1 em, h2 em { font-style: normal; color: inherit; }
h2 { font-weight: 620; font-size: clamp(1.6rem, 1.2rem + 1.2vw, 2.1rem); line-height: 1.12; }
h3 { font-weight: 620; font-size: 1.22rem; line-height: 1.25; }
.lede { font-size: 1.2rem; color: var(--muted); max-width: 38rem; margin: 0; }
.muted { color: var(--muted); }
.mono { font-family: var(--display); font-size: 0.9rem; }
p { margin: 0; }

/* Header */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(1.2) blur(10px); -webkit-backdrop-filter: saturate(1.2) blur(10px);
  border-bottom: 1px solid var(--rule);
}
.site-header .container { display: flex; align-items: center; gap: 1rem; min-height: var(--header-h); }
.brand { display: flex; align-items: baseline; gap: 0.5rem; text-decoration: none; margin-right: auto; }
.brand b { font-family: var(--display); font-stretch: 112%; font-weight: 760; font-size: 1.05rem; letter-spacing: -0.005em; }
.brand span { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); }
.nav { display: flex; align-items: center; gap: 0.25rem; list-style: none; margin: 0; padding: 0; }
.nav a {
  display: block; font-family: var(--mono); font-size: 0.88rem; text-decoration: none; color: var(--muted);
  padding: 0.4rem 0.6rem; border-radius: 4px;
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); background: var(--paper-2); }
.icon-btn {
  display: inline-grid; place-items: center; width: 2.2rem; height: 2.2rem; border-radius: 6px;
  background: transparent; border: 1px solid var(--rule); color: var(--ink); cursor: pointer;
}
.icon-btn:hover { background: var(--paper-2); }
.icon-btn svg { width: 1.05rem; height: 1.05rem; }
.menu-btn { display: none; }
@media (max-width: 720px) {
  .menu-btn { display: inline-grid; }
  .nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column;
    background: var(--paper); border-bottom: 1px solid var(--rule);
    padding: 0.5rem var(--gutter-r) 0.75rem var(--gutter);
  }
  .nav.open { display: flex; }
  .nav a { font-size: 0.9rem; padding: 0.6rem 0.5rem; }
}

/* Buttons */
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem; font-family: var(--mono); font-size: 0.92rem;
  text-decoration: none; padding: 0.7rem 1rem; border-radius: 6px; border: 1px solid var(--ink);
  background: var(--ink); color: var(--paper); cursor: pointer;
}
.btn:hover { background: var(--copper); border-color: var(--copper); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--rule); }
.btn.ghost:hover { border-color: var(--ink); background: transparent; }

/* Sections */
.section { padding-block: 4.5rem; }
.section + .section { border-top: 1px solid var(--rule); }
.section-head { display: grid; gap: 0.6rem; margin-bottom: 2.25rem; max-width: 46rem; }
.section-head .lede { font-size: 1.08rem; }

/* Lists of links (articles, repos) */
.rows { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--rule); }
.rows li { border-bottom: 1px solid var(--rule); }
.rows a {
  display: grid; grid-template-columns: 7.5rem minmax(0, 1fr) auto; gap: 0.25rem 1.25rem; align-items: baseline;
  padding: 1rem 0; text-decoration: none;
}
.rows a:hover h3 { color: var(--copper); }
.rows time, .rows .tag { font-family: var(--mono); font-size: 0.85rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.rows h3 { font-size: 1.06rem; font-stretch: 100%; transition: color .15s; }
.rows p { grid-column: 2; color: var(--muted); font-size: 0.97rem; }
@media (max-width: 640px) {
  .rows a { grid-template-columns: minmax(0, 1fr); }
  .rows p { grid-column: 1; }
  .rows .tag { justify-self: start; }
}

.pill {
  display: inline-block; font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.04em;
  border: 1px solid var(--rule); color: var(--muted); border-radius: 999px; padding: 0.05rem 0.55rem; white-space: nowrap;
}
.pill.mem { border-color: var(--copper); color: var(--copper); }
.pill.ctx { border-color: var(--teal); color: var(--teal); }

/* Footer */
.site-footer { border-top: 1px solid var(--rule); padding-block: 2.5rem 3rem; color: var(--muted); font-size: 0.92rem; }
.site-footer .container { display: flex; flex-wrap: wrap; gap: 1rem 2rem; justify-content: space-between; align-items: center; }
.site-footer ul { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; list-style: none; margin: 0; padding: 0; font-family: var(--mono); font-size: 0.9rem; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

/* Systems dropdown in the header */
.nav .has-sub { position: relative; }
.sub-toggle {
  display: flex; align-items: center; gap: 0.3rem; line-height: inherit; font-family: var(--mono); font-size: 0.88rem; color: var(--muted);
  padding: 0.4rem 0.6rem; border-radius: 4px; border: 0; background: none; cursor: pointer;
}
.sub-toggle svg { width: 0.75rem; height: 0.75rem; transition: transform 0.2s; }
.sub-toggle:hover, .has-sub:has(a[aria-current="page"]) .sub-toggle { color: var(--ink); background: var(--paper-2); }
.has-sub.open .sub-toggle svg { transform: rotate(180deg); }
.nav .sub {
  display: none; position: absolute; top: calc(100% + 0.4rem); left: 0; min-width: 16rem; list-style: none; margin: 0; padding: 0.35rem;
  background: var(--card); border: 1px solid var(--rule); border-radius: 8px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18); z-index: 60;
}
.has-sub.open .sub { display: grid; gap: 0.15rem; }
.nav .sub a { display: grid; gap: 0.1rem; padding: 0.55rem 0.65rem; }
.nav .sub b { font-family: var(--display); font-weight: 650; font-size: 0.9rem; color: var(--ink); }
.nav .sub span { font-size: 0.72rem; }
@media (max-width: 720px) {
  .sub-toggle { font-size: 0.9rem; padding: 0.6rem 0.5rem; width: 100%; justify-content: space-between; }
  .nav .sub { position: static; box-shadow: none; border: 0; border-left: 2px solid var(--rule); border-radius: 0; margin-left: 0.5rem; min-width: 0; }
}


/* ===== arch ===== */
/* Architecture player: a tiered board whose components appear, change and leave stage by stage. */
.arch { --accent: var(--probe); background: var(--card); border: 1px solid var(--rule); border-radius: 10px; padding: 1rem; display: grid; gap: 0.85rem; }


.arch-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.25rem 0.75rem; min-height: 1.6rem; }
.arch-date { font-family: var(--mono); font-size: 0.85rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.arch-title { font-family: var(--display); font-stretch: 106%; font-weight: 720; font-size: 1.02rem; }
.arch-part { font-family: var(--mono); font-size: 0.8rem; color: var(--accent); }

.arch-grid {
  position: relative; display: grid;
  grid-template-columns: 4.8rem repeat(var(--cols, 4), minmax(0, 1fr));
  grid-template-rows: repeat(var(--rows, 6), minmax(3.15rem, auto));
  gap: 0.45rem;
}
.arch-band { grid-column: 1 / -1; border-top: 1px dashed var(--rule); z-index: 0; }
.arch-band:first-of-type { border-top: 0; }
.arch-tier {
  grid-column: 1; align-self: center; z-index: 1; padding-left: 0.1rem;
  font-family: var(--mono); font-size: 0.7rem; color: var(--muted); line-height: 1.2; opacity: 0.8;
}

/* Unchanged components stay quiet; only what changed this stage carries colour. */
.node {
  position: relative; z-index: 2; min-width: 0; margin: 0.3rem 0;
  display: flex; flex-direction: column; justify-content: center; gap: 0.12rem;
  padding: 0.4rem 0.55rem; border: 1px solid var(--rule); border-radius: 6px; background: transparent;
  opacity: 0; transform: scale(0.94); visibility: hidden;
  transition: opacity 0.45s ease, transform 0.45s ease, border-color 0.3s, background-color 0.3s, color 0.3s, visibility 0s linear 0.45s;
}
.node.is-on, .node.is-removed { opacity: 1; transform: none; visibility: visible; transition-delay: 0s; }
.node-label { font-family: var(--display); font-weight: 560; font-size: 0.8rem; line-height: 1.15; color: var(--muted); overflow-wrap: break-word; }
.node-sub { font-family: var(--mono); font-size: 0.7rem; line-height: 1.3; color: var(--muted); overflow-wrap: break-word; }
.node-sub:empty { display: none; }
.node-badge {
  position: absolute; top: -0.55rem; right: -0.35rem; display: none; place-items: center;
  min-width: 1.15rem; height: 1.15rem; padding: 0 0.25rem; border-radius: 999px;
  font-family: var(--mono); font-size: 0.78rem; line-height: 1; color: var(--card); background: var(--red);
}
.node.is-added { background: var(--accent); border-color: var(--accent); animation: node-pop 0.6s ease; }
.node.is-added .node-label { color: var(--card); font-weight: 680; }
.node.is-added .node-sub { color: color-mix(in srgb, var(--card) 82%, var(--accent)); }
.node.is-changed { border: 1.5px solid var(--accent); }
.node.is-changed .node-label, .node.is-warn .node-label, .node.is-soon .node-label { color: var(--ink); font-weight: 650; }
.node.is-warn { border: 1.5px solid var(--amber); }
.node.is-warn .node-sub { color: var(--amber); }
.node.is-soon { border: 1.5px dashed var(--accent); }
.node.is-rejected {
  border-style: dashed; border-color: var(--muted);
  background: repeating-linear-gradient(135deg, transparent 0 6px, color-mix(in srgb, var(--muted) 12%, transparent) 6px 7px);
}
.node.is-removed { border: 1.5px dashed var(--red); opacity: 0.9; }
.node.is-removed .node-label { text-decoration: line-through; text-decoration-color: var(--red); color: var(--red); }
.node.is-removed .node-badge { display: grid; }
@keyframes node-pop { 0% { transform: scale(0.9); } 60% { transform: scale(1.04); } 100% { transform: none; } }

.arch-delta { font-family: var(--mono); font-size: 0.84rem; color: var(--muted); display: flex; flex-wrap: wrap; gap: 0.2rem 0.9rem; margin-top: -0.4rem; }
.arch-delta b { font-weight: 500; }
.arch-delta .d-add { color: var(--accent); }
.arch-delta .d-chg { color: var(--ink); }
.arch-delta .d-del { color: var(--red); }

.arch-edges { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 1; overflow: visible; }
.arch-edges path { fill: none; stroke: var(--accent); stroke-width: 1.4; opacity: 0.55; }
.arch-edges path.is-new { transition: stroke-dashoffset 0.9s ease; }
.arch-edges marker path { fill: var(--accent); stroke: none; opacity: 0.8; }

.arch-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 1rem; justify-content: space-between; }
.arch-controls { display: flex; align-items: center; gap: 0.35rem; }
.arch-btn {
  display: inline-grid; place-items: center; width: 2.1rem; height: 2.1rem; border-radius: 6px;
  border: 1px solid var(--rule); background: transparent; color: var(--ink); cursor: pointer;
}
.arch-btn:hover { border-color: var(--ink); }
.arch-btn:disabled { opacity: 0.4; cursor: default; }
.arch-btn svg { width: 0.95rem; height: 0.95rem; }
.arch-dots { display: flex; flex-wrap: wrap; gap: 0.3rem; list-style: none; margin: 0; padding: 0; }
.arch-dots button {
  width: 0.7rem; height: 0.7rem; padding: 0; border-radius: 50%; cursor: pointer;
  border: 1.5px solid var(--accent); background: transparent;
}
.arch-dots button[aria-current="step"] { background: var(--accent); }
.arch-dots button.is-soon { border-style: dashed; }
.arch-legend { display: flex; flex-wrap: wrap; gap: 0.2rem 0.85rem; list-style: none; margin: 0; padding: 0; font-family: var(--mono); font-size: 0.76rem; color: var(--muted); }
.arch-legend li { display: flex; align-items: center; gap: 0.4rem; }
.arch-legend i { display: inline-block; width: 0.9rem; height: 0.6rem; border-radius: 2px; border: 1.5px solid var(--rule); }
.arch-legend .k-add { background: var(--accent); border-color: var(--accent); }
.arch-legend .k-chg { border-color: var(--accent); }
.arch-legend .k-del { border: 1.5px dashed var(--red); }
.arch-legend .k-warn { border-color: var(--amber); }
.arch-legend .k-rej { border: 1.5px dashed var(--muted); }
.arch-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Mini (home hero) */
.arch--mini { padding: 0.85rem; gap: 0.6rem; }
.arch--mini .arch-grid { grid-template-columns: 3.6rem repeat(var(--cols, 4), minmax(0, 1fr)); grid-template-rows: repeat(var(--rows, 6), minmax(2.35rem, auto)); gap: 0.32rem; }
.arch--mini .node { padding: 0.3rem 0.4rem; margin: 0.15rem 0; }
.arch--mini .node-label { font-size: 0.68rem; }
.arch--mini .node-sub { display: none; }
.arch--mini .arch-delta { font-size: 0.68rem; }
.arch--mini .arch-tier { font-size: 0.52rem; padding-left: 0.35rem; }
.arch--mini .arch-legend { display: none; }

@media (max-width: 520px) {
  .arch { padding: 0.7rem; }
  .arch-grid { grid-template-columns: 3.1rem repeat(var(--cols, 4), minmax(0, 1fr)); grid-template-rows: repeat(var(--rows, 6), minmax(2.5rem, auto)); gap: 0.3rem; }
  .arch-tier { font-size: 0.5rem; padding-left: 0.3rem; }
  .node { padding: 0.3rem 0.35rem; margin: 0.15rem 0; }
  .node-label { font-size: 0.66rem; }
  .node-sub { display: none; }
}

/* Story layout: narrative steps beside a sticky player */
.story { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 3rem; align-items: start; }
.story-stage { position: sticky; top: calc(var(--header-h) + 1rem); }
.steps-list { list-style: none; margin: 0; padding: 0; }
.step { min-height: 64vh; padding-block: 1.5rem 3rem; display: grid; gap: 0.7rem; align-content: start; border-left: 2px solid var(--rule); padding-left: 1.25rem; transition: border-color 0.3s; }
.step.is-active { border-left-color: var(--probe); }
.step-meta { display: flex; flex-wrap: wrap; gap: 0.3rem 0.75rem; align-items: center; font-family: var(--mono); font-size: 0.84rem; color: var(--muted); }
.step-meta .part { color: var(--copper); }
.steps-list[data-track="ctx"] .step-meta .part { color: var(--teal); }
.step h3 { font-size: 1.35rem; }
.step > p { max-width: 38rem; }
.diff { list-style: none; margin: 0.2rem 0 0; padding: 0; display: grid; gap: 0.35rem; font-size: 0.96rem; }
.diff li { position: relative; padding-left: 1.3rem; }
.diff li::before { position: absolute; left: 0; top: 0; font-family: var(--display); font-weight: 700; }
.diff code { overflow-wrap: anywhere; }
.diff .add::before { content: "+"; color: var(--probe); }
.diff .del::before { content: "−"; color: var(--red); }
.diff .chg::before { content: "~"; color: var(--probe); }
.diff .opt::before { content: "◇"; color: var(--muted); }
.diff .rej::before { content: "×"; color: var(--muted); }
.diff .warn::before { content: "!"; color: var(--amber); }
.diff .opt, .diff .rej { color: var(--muted); }
.measured {
  background: var(--card); border: 1px solid var(--rule); border-radius: 6px; padding: 0.6rem 0.8rem;
  font-family: var(--mono); font-size: 0.88rem; line-height: 1.55; font-variant-numeric: tabular-nums;
}
.measured ul { margin: 0; padding-left: 1.1rem; }
.step-links { display: flex; flex-wrap: wrap; gap: 0.3rem 1.1rem; font-family: var(--mono); font-size: 0.88rem; }
.quote { font-style: italic; color: var(--muted); }

@media (max-width: 900px) {
  .story { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .story-stage { order: -1; top: var(--header-h); z-index: 10; background: var(--paper); padding-block: 0.6rem; margin-inline: calc(-1 * var(--gutter)) calc(-1 * var(--gutter-r)); padding-inline: var(--gutter) var(--gutter-r); border-bottom: 1px solid var(--rule); }
  .story-stage .arch-legend, .story-stage .node-sub { display: none; }
  .story-stage .arch-grid { grid-template-rows: repeat(var(--rows, 6), minmax(2.3rem, auto)); }
  .step { min-height: 58vh; }
}

/* Reserve the player's space before the script draws it, so nothing below shifts. */
.story-stage > div:empty { min-height: 38rem; }
@media (max-width: 900px) { .story-stage > div:empty { min-height: 25rem; } }


/* ===== flow ===== */
/* Flow player as a chip die. The die is the one bold surface of the site: a dark substrate in
   both themes, graphite blocks with pads, faint orthogonal traces, and probe blue for the live signal. */
.flow {
  --die-bg: #0D0F12;
  --die-dot: rgba(255, 255, 255, 0.07);
  --die-zone: rgba(255, 255, 255, 0.10);
  --die-block: #15181D;
  --die-edge: #2B3038;
  --die-pad: #3A404A;
  --die-text: #D7DBE1;
  --die-dim: #7D848E;
  --die-trace: rgba(255, 255, 255, 0.09);
  --die-done: #2F4FA8;
  --die-live: #6F93FF;
  --die-stop: #F07A63;
  background: var(--die-bg); color: var(--die-text);
  border-radius: 14px; padding: 1.1rem 1.2rem; display: grid; gap: 0.8rem;
}
.flow-head { display: grid; gap: 0.25rem; min-height: 2.6rem; }
.flow-head .k { font-family: var(--display); font-size: 0.85rem; color: var(--die-dim); }
.flow-head .t { font-family: var(--display); font-weight: 600; font-size: 1.05rem; line-height: 1.3; color: #fff; }

.flow-map { position: relative; width: 100%; }
.die { display: block; width: 100%; height: auto; font-family: var(--display); }
.die-substrate { fill: var(--die-bg); }
.die-dot { fill: var(--die-dot); }
.die-zone { fill: none; stroke: var(--die-zone); stroke-width: 1; stroke-dasharray: 2 4; }
.die-zone-label { fill: var(--die-dim); font-size: 11px; letter-spacing: 0.02em; }

.die-trace { fill: none; stroke: var(--die-trace); stroke-width: 1.4; stroke-linejoin: round; transition: stroke 0.4s; }
.die-trace.is-done { stroke: var(--die-done); }
.die-trace.is-live { stroke: var(--die-live); stroke-width: 2; stroke-dasharray: 6 5; animation: die-flow 0.9s linear infinite; }
@keyframes die-flow { to { stroke-dashoffset: -11; } }

.die-pad { fill: var(--die-pad); transition: fill 0.3s; }
.die-body { fill: var(--die-block); stroke: var(--die-edge); stroke-width: 1; transition: fill 0.35s, stroke 0.35s; }
.die-label { fill: var(--die-dim); font-size: 14px; font-weight: 600; transition: fill 0.35s; }
.die-sub { fill: var(--die-dim); font-size: 10.5px; opacity: 0.8; }
.die-block.is-seen .die-body { stroke: var(--die-done); }
.die-block.is-seen .die-label { fill: var(--die-text); }
.die-block.is-seen .die-pad { fill: var(--die-done); }
.die-block.is-here .die-body { fill: #172347; stroke: var(--die-live); stroke-width: 1.5; }
.die-block.is-here .die-label { fill: #fff; }
.die-block.is-here .die-sub { fill: #B9C8FF; opacity: 1; }
.die-block.is-here .die-pad { fill: var(--die-live); }
.die-block.is-stop .die-body { stroke: var(--die-stop); fill: #3A1C17; }
.die-block.is-stop .die-pad { fill: var(--die-stop); }

.die-pulse { fill: #fff; opacity: 0; }
.die-tag { opacity: 0; transition: opacity 0.25s; pointer-events: none; }
.die-tag rect { fill: #fff; }
.die-tag text { fill: #0D0F12; font-size: 10.5px; font-weight: 600; }

.flow .arch-btn { color: #fff; border-color: rgba(255, 255, 255, 0.18); }
.flow .arch-btn:hover { border-color: #fff; }
.flow-foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.6rem 1rem; }
.flow-count { font-family: var(--display); font-size: 0.85rem; color: var(--die-dim); font-variant-numeric: tabular-nums; }

/* Full-screen variant: a full-bleed dark stage; the die takes the width, the step reads in a band below */
body:has(.story--full) { overflow-x: clip; }
.flow-mapwrap { min-width: 0; }
.story--full { display: block; position: relative; }
.story--full .story-stage {
  position: sticky; top: var(--header-h); z-index: 5;
  height: calc(100vh - var(--header-h)); height: calc(100dvh - var(--header-h));
  margin-inline: calc(50% - 50vw); padding: 0; background: #0D0F12; border: 0;
}
.flow--full {
  height: 100%; max-width: 120rem; margin-inline: auto; border-radius: 0;
  padding: 1.25rem max(16px, 2.5vw) 0.9rem;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr) auto auto;
  grid-template-areas: "map" "cap" "foot";
  row-gap: 0.9rem;
}
.flow--full .flow-head { display: none; }
.flow--full .flow-mapwrap { grid-area: map; min-height: 0; container-type: size; display: grid; place-items: center; }
.flow--full .flow-map { width: min(100cqw, calc(100cqh * var(--ar))); }
.flow--full .flow-foot { grid-area: foot; }
.flow-caption {
  grid-area: cap; display: grid; grid-template-columns: minmax(0, 20rem) minmax(0, 1fr); column-gap: 2.5rem; row-gap: 0.25rem;
  align-items: start; border-top: 1px solid rgba(255, 255, 255, 0.12); padding-top: 0.9rem; min-height: 6.5rem;
}
.flow-caption .tag { grid-column: 1; font-family: var(--display); font-size: 0.9rem; color: var(--die-live); }
.flow-caption h3 { grid-column: 1; font-size: 1.45rem; color: #fff; }
.flow-caption p:not(.tag) { grid-column: 2; grid-row: 1 / span 3; color: var(--die-text); max-width: 48rem; font-size: 1.05rem; }
.flow-caption code { color: #fff; }
.story--full .steps-list { position: relative; z-index: 1; margin-top: calc(-1 * (100vh - var(--header-h))); }
.story--full .step { min-height: 62vh; opacity: 0; pointer-events: none; border: 0; }
.story--full .steps-list li:last-child .step { min-height: 100vh; }
@media (max-width: 900px) {
  .flow { padding: 0.8rem; border-radius: 10px; }
  .flow--full { padding: 0.75rem var(--gutter-r) 0.75rem var(--gutter); }
  .flow--full .flow-mapwrap { container-type: normal; display: block; align-self: center; overflow-x: auto; scrollbar-width: none; }
  .flow--full .flow-mapwrap::-webkit-scrollbar { display: none; }
  .flow--full .flow-map { width: 760px; }
  .flow-caption { grid-template-columns: minmax(0, 1fr); min-height: 0; padding-top: 0.6rem; }
  .flow-caption p:not(.tag) { grid-column: 1; grid-row: auto; font-size: 0.92rem; }
  .flow-caption h3 { font-size: 1.05rem; }
}

/* Reserve the home die's space before the script draws it. */
#apu-die:empty { aspect-ratio: 692 / 380; }