/* Shared chrome for sub-pages. Variables and typography mirror index.html. */
:root {
  --ink: #111111;
  --ink-soft: #2e2e2e;
  --gray-1: #4a4a4a;
  --gray-2: #7a7a7a;
  --gray-3: #b5b5b5;
  --gray-4: #e2e2e2;
  --paper: #f7f6f3;
  --paper-deep: #efeeea;
  --serif: "Didot", "Bodoni MT", "Playfair Display", "Georgia", serif;
  --mono: "Courier New", "Courier", monospace;
  --sans: "Helvetica Neue", "Helvetica", "Arial", sans-serif;
}
:root[data-theme="dark"] {
  --ink: #ededea;
  --ink-soft: #d4d4d0;
  --gray-1: #b8b8b4;
  --gray-2: #8a8a86;
  --gray-3: #555552;
  --gray-4: #2c2c2a;
  --paper: #141413;
  --paper-deep: #1c1c1a;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 5.5rem; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  overflow-x: hidden;
}
body::after {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 40;
  background-image: radial-gradient(var(--gray-3) 0.5px, transparent 0.5px);
  background-size: 3px 3px;
  opacity: 0.14;
  mix-blend-mode: multiply;
}
:root[data-theme="dark"] body::after { mix-blend-mode: screen; opacity: 0.08; }

/* nav */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 30;
  display: flex; justify-content: space-between; align-items: center;
  padding: 1.1rem 2rem;
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px dotted var(--gray-3);
}
nav .mark {
  font-family: var(--serif);
  font-size: 1.15rem;
  letter-spacing: 0.06em;
  color: var(--ink);
  text-decoration: none;
}
nav .mark .dot { color: var(--gray-2); display: inline-block; transition: transform 0.4s cubic-bezier(.34,1.56,.64,1), color 0.3s; }
nav .mark:hover .dot { transform: scale(1.6); color: var(--ink); }
nav { transition: padding 0.3s cubic-bezier(.16,1,.3,1); }
nav.scrolled { padding-top: 0.7rem; padding-bottom: 0.7rem; }
nav::after { content: ""; position: absolute; left: 0; right: 0; bottom: -3px; height: 3px;
  background: radial-gradient(var(--ink) 1.2px, transparent 1.4px) 0 0 / 8px 3px;
  clip-path: inset(0 calc(100% - var(--p, 0%)) 0 0); }
nav ul { display: flex; gap: 2rem; list-style: none; }
nav ul a {
  color: var(--gray-1);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: color 0.25s;
}
nav ul a:hover { color: var(--ink); }

/* page header: static dot field, no canvas */
.page-head {
  position: relative;
  padding: 9rem 2rem 4rem;
  overflow: hidden;
}
.page-head::before {
  content: "";
  position: absolute; inset: 0;
  background-image: radial-gradient(var(--ink) 1.2px, transparent 1.4px);
  background-size: 18px 18px;
  opacity: 0.22;
  -webkit-mask-image: linear-gradient(100deg, transparent 35%, black 100%);
  mask-image: linear-gradient(100deg, transparent 35%, black 100%);
  pointer-events: none;
}
.page-head .wrap { position: relative; z-index: 1; }
.wrap { max-width: 1100px; margin: 0 auto; }
.crumbs {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-2);
  margin-bottom: 1.4rem;
}
.crumbs a { color: var(--gray-2); text-decoration: none; }
.crumbs a:hover { color: var(--ink); }
.crumbs span { margin: 0 0.5rem; }
.kicker {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gray-2);
  margin-bottom: 1.4rem;
}
h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(2.3rem, 6vw, 4.4rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  max-width: 16ch;
}
h1 em { font-style: italic; color: var(--gray-2); }
.lede {
  margin-top: 1.8rem;
  max-width: 58ch;
  color: var(--gray-1);
  font-size: 1.1rem;
}

/* dotted rule */
.rule {
  height: 1px;
  max-width: 1100px;
  margin: 0 auto;
  border-top: 1px dotted var(--gray-3);
  position: relative;
}
.rule::after {
  content: "· · ·";
  position: absolute;
  top: -0.85em; left: 50%;
  transform: translateX(-50%);
  background: var(--paper);
  padding: 0 1rem;
  color: var(--gray-2);
  font-size: 1.1rem;
  letter-spacing: 0.4em;
}

/* prose */
main.prose { padding: 4rem 2rem 5rem; }
.prose h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  line-height: 1.15;
  margin: 3rem 0 1.2rem;
  max-width: 26ch;
}
.prose h2:first-child { margin-top: 0; }
.prose h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.35rem;
  margin: 2rem 0 0.7rem;
}
.prose p, .prose li { color: var(--ink-soft); max-width: 68ch; }
.prose p { margin-bottom: 1.1rem; }
.prose ul, .prose ol { margin: 0 0 1.2rem 1.4rem; }
.prose li { margin-bottom: 0.45rem; }
.prose a { color: var(--ink); text-decoration: underline; text-decoration-style: dotted; text-underline-offset: 3px; }
.prose a { text-decoration-thickness: 1px; transition: text-underline-offset 0.25s, color 0.25s; }
.prose a:hover { color: var(--gray-2); text-underline-offset: 5px; }
.prose strong { font-weight: 600; color: var(--ink); }
.prose code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--paper-deep);
  padding: 0.1em 0.35em;
  border: 1px dotted var(--gray-3);
}
.prose pre {
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.55;
  background: var(--paper-deep);
  border: 1px dotted var(--gray-3);
  padding: 1.1rem 1.3rem;
  overflow-x: auto;
  margin: 0 0 1.4rem;
  max-width: 100%;
}
.prose pre code { background: none; border: 0; padding: 0; font-size: inherit; }

/* meta list on build pages */
.meta {
  list-style: none;
  margin: 0 0 2.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0;
  border-top: 1px dotted var(--gray-3);
  border-bottom: 1px dotted var(--gray-3);
}
.meta li { padding: 1rem 1rem 1rem 0; font-size: 0.92rem; max-width: none; }
.meta .k {
  display: block;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gray-2);
  margin-bottom: 0.3rem;
}
.status {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--gray-3);
  color: var(--gray-1);
}
.status.live { border-color: var(--ink); color: var(--ink); }

/* callout */
.callout {
  border: 1px dotted var(--gray-3);
  background: var(--paper-deep);
  padding: 1.4rem 1.6rem;
  margin: 2rem 0;
  position: relative;
}
.callout::before {
  content: "";
  position: absolute; inset: 0;
  background-image: radial-gradient(var(--ink) 1px, transparent 1.2px);
  background-size: 9px 9px;
  opacity: 0.06;
  pointer-events: none;
}
.callout .k {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gray-2);
  display: block;
  margin-bottom: 0.6rem;
}
.callout p:last-child { margin-bottom: 0; }

/* build grid */
.build-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--gray-3);
  border: 1px solid var(--gray-3);
  margin: 0 0 3rem;
}
.build-grid a.build {
  display: block;
  background: var(--paper);
  padding: 2rem 1.8rem 2.2rem;
  text-decoration: none;
  color: var(--ink);
  transition: background 0.3s;
}
.build-grid a.build:hover { background: var(--paper-deep); }
.build-grid .num {
  font-family: var(--mono);
  color: var(--gray-3);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
}
.build-grid h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.4rem;
  margin: 0.8rem 0 0.6rem;
}
.build-grid p { color: var(--gray-1); font-size: 0.93rem; margin: 0 0 0.9rem; }

/* series list */
.parts { list-style: none; margin: 0 0 3rem; border-top: 1px dotted var(--gray-3); }
.parts li {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1.2rem;
  padding: 1.3rem 0;
  border-bottom: 1px dotted var(--gray-3);
  align-items: baseline;
  max-width: none;
}
.parts .n { font-family: var(--serif); font-style: italic; font-size: 1.8rem; color: var(--gray-3); }
.parts a { font-family: var(--serif); font-size: 1.25rem; text-decoration: none; color: var(--ink); }
.parts a:hover { color: var(--gray-2); }
.parts small { display: block; color: var(--gray-1); font-size: 0.92rem; margin-top: 0.25rem; }

/* pager */
.pager {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  border-top: 1px dotted var(--gray-3);
  padding-top: 1.6rem;
  margin-top: 3rem;
}
.pager a {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray-1);
  text-decoration: none;
}
.pager a { transition: color 0.25s, transform 0.3s cubic-bezier(.16,1,.3,1); }
.pager a:hover { color: var(--ink); }
.pager a:first-child:not(.next-card):hover { transform: translateX(-3px); }
.pager a:last-child:not(.next-card)::after { content: " · · ·"; letter-spacing: 0.1em; transition: letter-spacing 0.35s cubic-bezier(.16,1,.3,1); }
.pager a:last-child:not(.next-card):hover::after { letter-spacing: 0.45em; }
.parts li { transition: background 0.3s; }
.parts .n { transition: color 0.3s, transform 0.3s cubic-bezier(.16,1,.3,1); display: inline-block; }
.parts li:hover .n { color: var(--ink); transform: translateX(4px); }

/* buttons, cta, footer */
.btn {
  display: inline-block;
  padding: 0.85rem 1.8rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--ink);
  color: var(--ink);
  position: relative;
  transition: color 0.3s;
  overflow: hidden;
}
.btn::before {
  content: "";
  position: absolute; inset: 0;
  background-image: radial-gradient(var(--ink) 1.1px, transparent 1.2px);
  background-size: 5px 5px;
  clip-path: circle(0 at var(--x, 50%) var(--y, 100%));
  transition: clip-path 0.45s cubic-bezier(.16,1,.3,1);
}
.btn:hover::before { clip-path: circle(150% at var(--x, 50%) var(--y, 100%)); }
.btn:active { transform: scale(0.97); transition: transform 0.08s; }
:focus-visible { outline: 1px dotted var(--ink); outline-offset: 4px; }
.btn span { position: relative; z-index: 1; transition: color 0.3s; }
.btn:hover span { color: var(--paper); }
.sec-label {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gray-2);
  margin-bottom: 1rem;
}
.cta { padding: 5rem 2rem; border-top: 1px dotted var(--gray-3); }
.cta h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  line-height: 1.15;
  max-width: 22ch;
  margin-bottom: 1rem;
}
.cta p { color: var(--gray-1); max-width: 48ch; margin-bottom: 1.8rem; }
footer {
  padding: 2.5rem 2rem 3rem;
  border-top: 1px dotted var(--gray-3);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-2);
}
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s cubic-bezier(.16,1,.3,1), transform 0.7s cubic-bezier(.16,1,.3,1); transition-delay: calc(var(--i, 0) * 70ms); }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 720px) {
  nav ul { gap: 1rem; }
  nav ul li:not(:first-child) { display: none; }
  .page-head { padding: 7rem 1rem 3rem; }
  main.prose, .cta { padding-left: 1rem; padding-right: 1rem; }
  .parts li { grid-template-columns: 2.6rem 1fr; gap: 0.8rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}