@import url("../fonts/fonts.css");

/* ============================================================ tokens ==== */

:root {
  color-scheme: dark;

  --ink: #08090c;
  --ink-raised: #0e1014;
  --ink-sunken: #050608;
  --paper: #f0ebe1;
  --paper-dim: rgba(240, 235, 225, 0.64);
  --paper-faint: rgba(240, 235, 225, 0.4);
  --hair: rgba(240, 235, 225, 0.13);
  --hair-strong: rgba(240, 235, 225, 0.26);

  --amber: #e0a44a;
  --amber-soft: rgba(224, 164, 74, 0.24);
  --clay: #cd7150;
  --slate: #7ea6c9;

  --grid: rgba(240, 235, 225, 0.07);
  --glow: rgba(224, 164, 74, 0.13);
  --shadow: 0 1px 0 rgba(240, 235, 225, 0.05), 0 24px 60px -30px rgba(0, 0, 0, 0.9);

  --gutter: clamp(1.25rem, 5vw, 4.5rem);
  --wrap: 74rem;
  --measure: 34.5rem;
  --measure-wide: 46rem;

  --serif: "Newsreader", Iowan Old Style, Georgia, serif;
  --display: "Fraunces", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --step: clamp(4.5rem, 11vh, 8rem);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

:root[data-theme="light"] {
  color-scheme: light;

  --ink: #f4efe4;
  --ink-raised: #fbf8f1;
  --ink-sunken: #ece5d7;
  --paper: #15151a;
  --paper-dim: rgba(21, 21, 26, 0.7);
  --paper-faint: rgba(21, 21, 26, 0.46);
  --hair: rgba(21, 21, 26, 0.14);
  --hair-strong: rgba(21, 21, 26, 0.3);

  --amber: #9c6714;
  --amber-soft: rgba(156, 103, 20, 0.16);
  --clay: #a24a2a;
  --slate: #3d688f;

  --grid: rgba(21, 21, 26, 0.07);
  --glow: rgba(156, 103, 20, 0.09);
  --shadow: 0 1px 0 rgba(255, 255, 255, 0.6), 0 18px 44px -28px rgba(60, 45, 20, 0.45);
}

/* ============================================================== base ==== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--serif);
  font-optical-sizing: auto;
  font-size: clamp(1.02rem, 0.35vw + 0.94rem, 1.15rem);
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.4;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='4'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.42'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

:root[data-theme="light"] body::before { opacity: 0.55; }

img, svg { display: block; max-width: 100%; }

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

::selection { background: var(--amber); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--amber);
  color: #08090c;
  padding: 0.75rem 1.1rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  z-index: 100;
}
.skip:focus { left: 1rem; top: 1rem; }

/* ========================================================== helpers ==== */

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
  position: relative;
  z-index: 1;
}

.measure { max-width: var(--measure); }
.measure-wide { max-width: var(--measure-wide); }
.center-x { margin-inline: auto; }

.label {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--paper-faint);
  margin: 0;
}
.label .dot { color: var(--amber); }

.hair { height: 1px; background: var(--hair); border: 0; margin: 0; }

.mono { font-family: var(--mono); font-size: 0.8em; letter-spacing: 0.02em; }

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 400;
  font-optical-sizing: auto;
  line-height: 1.06;
  letter-spacing: -0.018em;
  margin: 0;
  text-wrap: balance;
}

.display-xl {
  font-size: clamp(3.2rem, 11.5vw, 8.6rem);
  font-variation-settings: "SOFT" 12, "WONK" 1;
  line-height: 0.88;
  letter-spacing: -0.032em;
}
.display-l { font-size: clamp(2.3rem, 5.6vw, 4.4rem); line-height: 1; }
.display-m { font-size: clamp(1.6rem, 3.2vw, 2.5rem); line-height: 1.1; }
.display-s { font-size: clamp(1.25rem, 2vw, 1.55rem); line-height: 1.18; }

.lede {
  font-size: clamp(1.2rem, 1.1vw + 1rem, 1.6rem);
  line-height: 1.5;
  color: var(--paper-dim);
  font-style: italic;
}

.dim { color: var(--paper-dim); }
.faint { color: var(--paper-faint); }
.amber { color: var(--amber); }

/* ========================================================= sections ==== */

section.band { padding-block: var(--step); position: relative; }
section.band + section.band { padding-top: 0; }

.band-sunken {
  background: var(--ink-sunken);
  border-block: 1px solid var(--hair);
  padding-block: var(--step);
}

.stack > * + * { margin-top: 1.15em; }
.stack-lg > * + * { margin-top: 2.4rem; }

p { margin: 0 0 1.15em; }
p:last-child { margin-bottom: 0; }

/* ============================================================= nav ===== */

.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.85rem var(--gutter);
  background: color-mix(in srgb, var(--ink) 82%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.nav.is-stuck { border-bottom-color: var(--hair); }

.nav-mark {
  font-family: var(--display);
  font-variation-settings: "SOFT" 12, "WONK" 1;
  font-size: 1.06rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.nav-mark .v { color: var(--amber); }

.nav-links {
  display: flex;
  gap: 1.6rem;
  margin-left: auto;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.nav-links a { color: var(--paper-faint); transition: color 0.2s; white-space: nowrap; }
.nav-links a:hover, .nav-links a[aria-current] { color: var(--paper); }

.theme-toggle {
  appearance: none;
  background: none;
  border: 1px solid var(--hair);
  border-radius: 999px;
  color: var(--paper-faint);
  cursor: pointer;
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  padding: 0;
  transition: color 0.2s, border-color 0.2s;
}
.theme-toggle:hover { color: var(--amber); border-color: var(--hair-strong); }
.theme-toggle svg { width: 15px; height: 15px; }
.theme-toggle .sun { display: none; }
:root[data-theme="light"] .theme-toggle .sun { display: block; }
:root[data-theme="light"] .theme-toggle .moon { display: none; }

@media (max-width: 44rem) {
  .nav-links { gap: 1rem; font-size: 0.62rem; }
  .nav-links .hide-sm { display: none; }
}

/* ============================================================ hero ===== */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  /* The lower band belongs to the graphic, so the type never sits on it. */
  padding-block: clamp(6rem, 12vh, 8rem) clamp(10rem, 28vh, 15.5rem);
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 58% at 50% 112%, var(--glow), transparent 62%),
    radial-gradient(80% 40% at 50% -12%, var(--glow), transparent 60%);
}

.hero-art {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: min(32vh, 16rem);
  pointer-events: none;
  opacity: 0.95;
  -webkit-mask-image: linear-gradient(to top, #000 72%, transparent 100%);
  mask-image: linear-gradient(to top, #000 72%, transparent 100%);
}

.hero-inner { position: relative; z-index: 2; text-align: center; }

.hero h1 { margin: 1.6rem 0 0; }
.hero h1 .line { display: block; }
.hero h1 .v { color: var(--amber); }

.hero-sub {
  margin: 1.8rem auto 0;
  max-width: 30rem;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.1rem, 1vw + 0.9rem, 1.45rem);
  line-height: 1.45;
  color: var(--paper-dim);
  text-wrap: balance;
}

.hero-meta {
  margin-top: 2.4rem;
  display: flex;
  gap: 1.4rem;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}


/* =========================================================== button ==== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.72rem 1.3rem;
  border: 1px solid var(--hair-strong);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--paper);
  background: transparent;
  cursor: pointer;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s;
}
.btn:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.btn-primary { background: var(--amber); border-color: var(--amber); color: #0a0a0c; }
.btn-primary:hover { background: transparent; color: var(--amber); border-color: var(--amber); }
.btn svg { width: 13px; height: 13px; }

/* ============================================================ quote ==== */

.pull {
  font-family: var(--display);
  font-variation-settings: "SOFT" 20, "WONK" 1;
  font-weight: 300;
  font-size: clamp(1.7rem, 3.6vw, 3.1rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0;
  text-wrap: balance;
}
.pull em { font-style: italic; color: var(--amber); }

.pull-block {
  padding-block: clamp(3rem, 8vh, 6rem);
  text-align: center;
}
.pull-block cite {
  display: block;
  margin-top: 1.8rem;
  font-family: var(--mono);
  font-style: normal;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--paper-faint);
}

/* =========================================================== figure ==== */

.fig {
  margin: 0;
  border: 1px solid var(--hair);
  border-radius: 4px;
  background: var(--ink-raised);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.fig-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.1rem 1.3rem 0.9rem;
  border-bottom: 1px solid var(--hair);
}
.fig-head h3 {
  font-family: var(--serif);
  font-size: 0.98rem;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.3;
}
.fig-body { padding: 1.4rem 1.3rem 1.1rem; }
.fig figcaption {
  padding: 0 1.3rem 1.2rem;
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--paper-dim);
}
.fig figcaption .src {
  display: block;
  margin-top: 0.6rem;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-faint);
}

.chart { width: 100%; height: auto; overflow: visible; }
/* A presentation attribute always loses to a class rule, so these defaults
   step aside wherever a figure sets the colour on the element itself. */
.chart text {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.chart text:not([fill]) { fill: var(--paper-faint); }
.chart .val {
  font-family: var(--display);
  font-size: 15px;
  letter-spacing: -0.01em;
  text-transform: none;
}
.chart .val:not([fill]) { fill: var(--paper); }
.chart .grid-line { stroke: var(--grid); stroke-width: 1; }
.chart .axis-line { stroke: var(--hair-strong); stroke-width: 1; }
.chart .series { fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.chart .series:not([stroke]) { stroke: var(--amber); }
.chart .series-2:not([stroke]) { stroke: var(--slate); }
.chart .series-ghost:not([stroke]) { stroke: var(--paper-faint); stroke-width: 1.25; stroke-dasharray: 3 4; }
.chart .marker:not([fill]) { fill: var(--amber); }

/* Filled shapes need more body on parchment than they do on ink. */
.chart .beam { fill: var(--amber); fill-opacity: 0.15; stroke: var(--amber); stroke-opacity: 0.55; }
.chart .slab { fill: var(--paper); fill-opacity: 0.16; }
:root[data-theme="light"] .chart .beam { fill-opacity: 0.3; stroke-opacity: 0.75; }
:root[data-theme="light"] .chart .slab { fill-opacity: 0.22; }

/* Draw-on-reveal for line charts. */
.chart .draw {
  stroke-dasharray: var(--len, 1200);
  stroke-dashoffset: var(--len, 1200);
}
.is-in .chart .draw { animation: draw 1.5s var(--ease) forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }

.grow { transform: scaleY(0); transform-origin: bottom; }
.is-in .grow { animation: grow 0.9s var(--ease) forwards; animation-delay: var(--d, 0s); }
@keyframes grow { to { transform: scaleY(1); } }

.fade-in { opacity: 0; }
.is-in .fade-in { animation: fadeIn 0.7s var(--ease) forwards; animation-delay: var(--d, 0s); }
@keyframes fadeIn { to { opacity: 1; } }

/* ============================================================ cards ==== */

.grid { display: grid; gap: 1px; background: var(--hair); border: 1px solid var(--hair); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.cell {
  background: var(--ink);
  padding: 1.6rem 1.3rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: background 0.35s var(--ease);
}
a.cell:hover { background: var(--ink-raised); }
.cell .job-n {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  color: var(--amber);
}
.cell h3 {
  font-family: var(--display);
  font-size: 1.22rem;
  line-height: 1.14;
}
.cell p { font-size: 0.9rem; line-height: 1.55; color: var(--paper-dim); margin: 0; }
.cell .glyph { margin-top: auto; padding-top: 0.6rem; }
.cell .glyph svg { width: 100%; height: 52px; }

@media (max-width: 62rem) { .grid-5 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 46rem) {
  .grid-5, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* ============================================================= stat ==== */

.stats { display: flex; flex-wrap: wrap; gap: clamp(1.4rem, 3vw, 2.6rem); }
.stat { min-width: 8rem; }
.stat .n {
  font-family: var(--display);
  font-variation-settings: "SOFT" 16, "WONK" 1;
  font-size: clamp(2.4rem, 5vw, 3.9rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--amber);
  display: block;
}
.stat .n .unit { font-size: 0.44em; letter-spacing: 0; color: var(--paper-dim); }
.stat .k {
  display: block;
  margin-top: 0.7rem;
  font-size: 0.86rem;
  line-height: 1.45;
  color: var(--paper-dim);
  max-width: 13rem;
}

/* ======================================================= two-column ==== */

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}
.split.narrow-right { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); }
@media (max-width: 60rem) { .split, .split.narrow-right { grid-template-columns: 1fr; } }

.sticky { position: sticky; top: 6rem; }
@media (max-width: 60rem) { .sticky { position: static; } }

/* ========================================================= controls ==== */

.control {
  display: grid;
  gap: 0.7rem;
  padding: 1.1rem 1.3rem 1.3rem;
  border-top: 1px solid var(--hair);
  background: color-mix(in srgb, var(--ink-sunken) 60%, transparent);
}
.control-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}
.control-out {
  font-family: var(--display);
  font-size: 1.35rem;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

/* The running commentary under a control is prose, not a machine readout. */
.control-note {
  font-family: var(--serif);
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--paper-dim);
  font-style: italic;
  margin: 0;
  min-height: 2.7em;
}

input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 22px;
  background: transparent;
  cursor: grab;
  margin: 0;
}
input[type="range"]:active { cursor: grabbing; }
input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--hair-strong);
  border-radius: 2px;
}
input[type="range"]::-moz-range-track {
  height: 2px;
  background: var(--hair-strong);
  border-radius: 2px;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 15px;
  height: 15px;
  margin-top: -6.5px;
  border-radius: 50%;
  background: var(--amber);
  border: 0;
  box-shadow: 0 0 0 4px var(--amber-soft);
  transition: box-shadow 0.2s;
}
input[type="range"]:hover::-webkit-slider-thumb { box-shadow: 0 0 0 7px var(--amber-soft); }
input[type="range"]::-moz-range-thumb {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--amber);
  border: 0;
  box-shadow: 0 0 0 4px var(--amber-soft);
}

/* ========================================================== reveal ===== */

[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.85s var(--ease), transform 0.85s var(--ease);
  transition-delay: var(--delay, 0s);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* ========================================================= contents ==== */

.toc-part {
  display: grid;
  grid-template-columns: 10rem minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 3rem);
  padding-block: clamp(2rem, 5vh, 3.4rem);
  border-top: 1px solid var(--hair);
}
@media (max-width: 52rem) { .toc-part { grid-template-columns: 1fr; gap: 1.2rem; } }
.toc-part .part-meta .label { margin-bottom: 0.7rem; }
.toc-part .part-meta p { font-size: 0.86rem; color: var(--paper-faint); line-height: 1.5; margin: 0; }

.toc-item {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: 1rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--hair);
  transition: padding-left 0.3s var(--ease);
}
.toc-item:first-child { border-top: 1px solid var(--hair); }
.toc-item:last-child { border-bottom: 0; }
.toc-item:hover { padding-left: 0.6rem; }
.toc-item .n {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--paper-faint);
  padding-top: 0.35rem;
}
.toc-item h3 { font-family: var(--display); font-size: 1.28rem; line-height: 1.15; }
.toc-item:hover h3 { color: var(--amber); }
.toc-item p { margin: 0.4rem 0 0; font-size: 0.9rem; line-height: 1.55; color: var(--paper-dim); }

/* ========================================================== reader ==== */

.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--amber);
  z-index: 60;
  width: 0;
  transition: width 0.1s linear;
}

.reader {
  padding-top: 7rem;
  padding-bottom: 5rem;
}

.reader-head {
  max-width: var(--measure);
  margin-inline: auto;
  text-align: center;
  padding-block: clamp(1.5rem, 6vh, 4rem) clamp(2rem, 6vh, 3.6rem);
}
.reader-head h1 {
  font-size: clamp(2.1rem, 5.4vw, 3.6rem);
  font-variation-settings: "SOFT" 18, "WONK" 1;
  margin: 1rem 0 0;
}
.reader-head .flourish {
  width: 3.5rem;
  height: 1px;
  background: var(--hair-strong);
  margin: 1.8rem auto 0;
}

.prose {
  max-width: var(--measure);
  margin-inline: auto;
  font-size: clamp(1.06rem, 0.3vw + 1rem, 1.19rem);
  line-height: 1.76;
}
.prose p { margin: 0 0 1.35em; }
.prose > p + p { text-indent: 0; }
.prose h2 {
  font-family: var(--display);
  font-size: clamp(1.3rem, 2.2vw, 1.65rem);
  line-height: 1.2;
  margin: 2.6em 0 0.9em;
  letter-spacing: -0.012em;
}
.prose h3 { font-family: var(--display); font-size: 1.2rem; margin: 2.2em 0 0.7em; }
.prose strong { font-weight: 600; color: var(--paper); }
.prose em { font-style: italic; }
.prose hr {
  border: 0;
  height: auto;
  margin: 2.4em 0;
  text-align: center;
  color: var(--paper-faint);
}
.prose hr::after {
  content: "\00A7";
  font-family: var(--display);
  font-size: 0.9rem;
}
.prose .opener { text-indent: 0; }
.prose .dropcap {
  float: left;
  font-family: var(--display);
  font-variation-settings: "SOFT" 14, "WONK" 1;
  font-size: 3.5em;
  line-height: 0.78;
  padding: 0.06em 0.09em 0 0;
  color: var(--amber);
}
.prose .lead { font-variant-caps: all-small-caps; letter-spacing: 0.055em; }
.prose ol.notes-list {
  padding-left: 1.5rem;
  font-size: 0.94rem;
  line-height: 1.62;
  color: var(--paper-dim);
}
.prose ol.notes-list li { margin-bottom: 0.85em; }
.prose ol.notes-list strong { color: var(--amber); font-weight: 500; }

.reader-quote {
  max-width: var(--measure-wide);
  margin: clamp(3rem, 8vh, 5rem) auto;
  padding: clamp(2rem, 5vh, 3rem) 0;
  border-block: 1px solid var(--hair);
  text-align: center;
}

.reader-nav {
  max-width: var(--measure-wide);
  margin: clamp(3rem, 8vh, 5rem) auto 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}
.reader-nav a {
  background: var(--ink);
  padding: 1.5rem 1.4rem;
  display: grid;
  gap: 0.5rem;
  transition: background 0.3s var(--ease);
}
.reader-nav a:hover { background: var(--ink-raised); }
.reader-nav a:last-child { text-align: right; }
.reader-nav h4 { font-family: var(--display); font-size: 1.1rem; line-height: 1.2; }
.reader-nav .empty { background: var(--ink); }
@media (max-width: 44rem) {
  .reader-nav { grid-template-columns: 1fr; }
  .reader-nav a:last-child { text-align: left; }
}

/* ========================================================= downloads ==== */

.dl {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}
.dl a {
  background: var(--ink);
  padding: 1.5rem 1.4rem;
  display: grid;
  gap: 0.55rem;
  transition: background 0.3s var(--ease);
}
.dl a:hover { background: var(--ink-raised); }
.dl h4 { font-family: var(--display); font-size: 1.1rem; }
.dl p { margin: 0; font-size: 0.85rem; color: var(--paper-dim); line-height: 1.5; }
.dl .fmt {
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}

/* ========================================================== footer ===== */

.foot {
  border-top: 1px solid var(--hair);
  padding-block: clamp(3rem, 7vh, 5rem);
  margin-top: var(--step);
}
.foot-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(2, minmax(0, 1fr));
  gap: clamp(1.6rem, 4vw, 3rem);
}
@media (max-width: 52rem) { .foot-grid { grid-template-columns: 1fr; } }
.foot h4 { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--paper-faint); font-weight: 500; }
.foot ul { list-style: none; margin: 0.9rem 0 0; padding: 0; display: grid; gap: 0.55rem; }
.foot ul a { font-size: 0.92rem; color: var(--paper-dim); transition: color 0.2s; }
.foot ul a:hover { color: var(--amber); }
.foot .colophon { font-size: 0.85rem; color: var(--paper-faint); line-height: 1.6; margin-top: 1rem; }

/* ==================================================== reduced motion ==== */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .chart .draw { stroke-dashoffset: 0; }
  .grow { transform: none; }
  .fade-in { opacity: 1; }
}