/* ==========================================================================
   TypoPilot — aeronautical chart on paper
   One signal colour (international orange), serif display, ink on paper.
   Motion is eased, never sprung: things glide into place and stop.
   ========================================================================== */

:root {
  --paper: oklch(0.972 0.009 85);
  --paper-deep: oklch(0.945 0.012 82);
  --ink: oklch(0.2 0.014 262);
  --ink-soft: oklch(0.4 0.014 262);
  --ink-mute: oklch(0.56 0.012 262);
  --rule: oklch(0.2 0.014 262 / 0.13);
  --rule-strong: oklch(0.2 0.014 262 / 0.28);
  --signal: oklch(0.645 0.215 38);
  --signal-wash: oklch(0.645 0.215 38 / 0.1);
  --chart: oklch(0.47 0.11 252);
  --chart-wash: oklch(0.47 0.11 252 / 0.09);
  --board: oklch(0.19 0.008 262);
  --board-flap: oklch(0.275 0.008 262);
  --board-text: oklch(0.93 0.012 90);
  --board-amber: oklch(0.84 0.15 80);

  --font-display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --font-text: "Inter Tight", "Helvetica Neue", Arial, sans-serif;
  --font-data: "JetBrains Mono", ui-monospace, Menlo, monospace;

  --step--1: 0.8125rem;
  --step-0: 1.0625rem;
  --step-1: clamp(1.2rem, 1.1rem + 0.4vw, 1.4rem);
  --step-2: clamp(1.6rem, 1.3rem + 1vw, 2.2rem);
  --step-3: clamp(2.4rem, 1.6rem + 3vw, 4.4rem);
  --step-4: clamp(2.8rem, 1.4rem + 4.8vw, 6rem);

  --gutter: clamp(1.25rem, 4vw, 3rem);
  --wrap: 84rem;
  --section: clamp(6rem, 12vw, 11rem);

  /* Expo-out for arrivals, sine in-out for travel. No overshoot anywhere. */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-travel: cubic-bezier(0.65, 0, 0.35, 1);
  --dur: 1.1s;
}

/* ---------- Base ---------- */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: 5rem; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: var(--step-0);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}
body::after {
  /* paper grain */
  content: "";
  position: fixed; inset: 0; z-index: 100; pointer-events: none;
  opacity: 0.05; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
h1, h2, h3, p, ol, ul, dl, dd, figure { margin: 0; }
ol, ul { padding: 0; list-style: none; }
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 360;
  /* Capped optical size keeps hairlines (the e crossbar!) legible at display sizes */
  font-variation-settings: "opsz" 40;
  letter-spacing: -0.022em;
  line-height: 1.02;
  text-wrap: balance;
}
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-1); font-weight: 420; letter-spacing: -0.01em; line-height: 1.2; }
em { font-style: italic; font-weight: inherit; }
p { text-wrap: pretty; }
::selection { background: var(--signal); color: var(--paper); }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }

.wrap { width: min(100% - 2 * var(--gutter), var(--wrap)); margin-inline: auto; }
.section { padding-block: var(--section); }
.sr-only {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; top: 0.75rem; left: 0.75rem; z-index: 200;
  padding: 0.6rem 0.9rem; background: var(--ink); color: var(--paper);
  transform: translateY(-200%);
}
.skip-link:focus { transform: none; }

/* ---------- Type helpers ---------- */

.data {
  font-family: var(--font-data);
  font-size: 0.72rem;
  font-weight: 450;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.kicker {
  display: flex; align-items: baseline; gap: 1rem;
  padding-top: 1rem; border-top: 1px solid var(--rule-strong);
  color: var(--ink-soft);
}
.kicker b { font-weight: 500; color: var(--signal); }
.lede { font-size: var(--step-1); line-height: 1.45; color: var(--ink-soft); max-width: 34rem; }

.section-head {
  display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gutter);
  row-gap: 2rem; margin-bottom: clamp(3rem, 6vw, 5rem);
}
.section-head .kicker { grid-column: 1 / -1; }
.section-head h2 { grid-column: 1 / span 7; }
.section-head .lede { grid-column: 9 / -1; align-self: end; }

.link {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-weight: 500;
  background: linear-gradient(currentColor, currentColor) 0 100% / 100% 1px no-repeat;
  padding-bottom: 2px;
  transition: background-size 0.7s var(--ease), color 0.3s;
}
.link:hover { background-size: 0 1px; background-position: 100% 100%; }
.link .arrow { display: inline-block; transition: transform 0.7s var(--ease); }
.link:hover .arrow { transform: translateX(4px); }

.button {
  display: inline-flex; align-items: center; gap: 0.75rem;
  height: 3.25rem; padding: 0 1.4rem;
  background: var(--ink); color: var(--paper);
  font-weight: 500; letter-spacing: -0.005em;
  position: relative; overflow: hidden; isolation: isolate;
}
.button::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: var(--signal);
  transform: scaleX(0); transform-origin: right;
  transition: transform 0.8s var(--ease);
}
.button:hover::before { transform: scaleX(1); transform-origin: left; }
.button .arrow { display: inline-block; transition: transform 0.8s var(--ease); }
.button:hover .arrow { transform: translateX(4px); }

/* ---------- Masthead ---------- */

.masthead {
  position: sticky; top: 0; z-index: 50;
  background: oklch(0.972 0.009 85 / 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.5s;
}
.masthead.is-scrolled { border-bottom-color: var(--rule); }
.masthead-inner { display: flex; align-items: center; gap: 2rem; height: 4.25rem; }
.wordmark {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-display); font-size: 1.35rem; font-weight: 450; letter-spacing: -0.02em;
}
.wordmark svg { width: 1.1rem; fill: var(--signal); transform: rotate(90deg); transition: transform 0.9s var(--ease); }
.wordmark:hover svg { transform: rotate(90deg) translateY(-3px); }
.masthead-nav { display: flex; gap: 2rem; margin-left: auto; }
.masthead-nav a { position: relative; color: var(--ink-soft); font-size: 0.95rem; transition: color 0.3s; }
.masthead-nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -0.3rem; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: right;
  transition: transform 0.6s var(--ease);
}
.masthead-nav a:hover, .masthead-nav a[aria-current="page"] { color: var(--ink); }
.masthead-nav a:hover::after, .masthead-nav a[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }
.masthead-source { font-size: 0.95rem; }
.menu-toggle { display: none; margin-left: auto; font-size: 0.95rem; }

@media (max-width: 52rem) {
  .menu-toggle { display: block; }
  .masthead-source { display: none; }
  .masthead-nav {
    position: fixed; inset: 4.25rem 0 auto; flex-direction: column; gap: 0;
    padding: 0.5rem var(--gutter) 1.5rem; margin: 0;
    background: var(--paper); border-bottom: 1px solid var(--rule-strong);
    clip-path: inset(0 0 100% 0);
    transition: clip-path 0.7s var(--ease);
  }
  .masthead-nav a { padding: 1rem 0; border-bottom: 1px solid var(--rule); font-family: var(--font-display); font-size: 1.6rem; color: var(--ink); }
  .masthead-nav a::after { display: none; }
  .is-open .masthead-nav { clip-path: inset(0); }
}

/* ---------- Colophon ---------- */

.colophon { padding-block: clamp(4rem, 8vw, 6rem) 2rem; border-top: 1px solid var(--rule-strong); }
.colophon-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: var(--gutter); }
.colophon-grid > div:first-child p { margin-top: 1rem; max-width: 22rem; color: var(--ink-soft); }
.colophon h3 {
  font-family: var(--font-data); font-size: 0.72rem; font-weight: 450;
  text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-mute); margin-bottom: 1rem;
}
.colophon li + li { margin-top: 0.45rem; }
.colophon li a { color: var(--ink-soft); transition: color 0.3s; }
.colophon li a:hover { color: var(--signal); }
.colophon-base {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  margin-top: clamp(3rem, 6vw, 5rem); padding-top: 1.25rem; border-top: 1px solid var(--rule);
  color: var(--ink-mute);
}
@media (max-width: 40rem) {
  .colophon-grid { grid-template-columns: 1fr 1fr; }
  .colophon-grid > div:first-child { grid-column: 1 / -1; }
}

/* ---------- Motion ---------- */

.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  transition-delay: calc(var(--delay, 0) * 1ms);
}
.js [data-reveal].is-in { opacity: 1; transform: none; }

/* Headlines rise out of a mask, line by line */
.js [data-lines] { visibility: hidden; }
.js [data-lines]:has(.line) { visibility: visible; }
[data-lines] .line { display: block; overflow: hidden; padding-bottom: 0.1em; margin-bottom: -0.1em; }
[data-lines] .line > span { display: block; }
.js [data-lines] .line > span {
  transform: translateY(110%);
  transition: transform 1.3s var(--ease);
  transition-delay: calc(var(--line) * 90ms + var(--delay, 0) * 1ms);
}
.js [data-lines].is-in .line > span { transform: none; }

@media (max-width: 60rem) {
  .section-head h2, .section-head .lede { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
  .js [data-reveal], .js [data-lines] .line > span { opacity: 1; transform: none; }
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero { padding-top: clamp(2rem, 5vw, 4rem); }
.hero-head {
  display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gutter);
}
.hero-meta {
  grid-column: 1 / -1;
  display: flex; flex-wrap: wrap; gap: 0.5rem 2.5rem;
  padding-bottom: 1rem; border-bottom: 1px solid var(--rule-strong);
  color: var(--ink-mute);
}
.hero-meta span:first-child { color: var(--signal); }
.hero h1 {
  grid-column: 1 / span 9;
  margin-top: clamp(2rem, 5vw, 3.75rem);
  font-size: var(--step-4);
  font-weight: 350;
  letter-spacing: -0.04em;
  line-height: 0.96;
}
.hero h1 em { color: var(--signal); }
.hero-side { grid-column: 10 / -1; align-self: end; display: grid; gap: 1.75rem; padding-bottom: 0.6rem; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1.5rem; }

/* ---------- Flight stage ---------- */

.flight { margin-top: clamp(3rem, 7vw, 5.5rem); border-block: 1px solid var(--rule-strong); }
.flight-stage {
  position: relative;
  padding: clamp(5rem, 11vw, 9rem) var(--gutter) clamp(3.5rem, 7vw, 5.5rem);
  overflow: hidden;
  cursor: grab;
  touch-action: pan-y;
  user-select: none;
  -webkit-user-select: none;
  background-image: radial-gradient(var(--rule-strong) 1px, transparent 1.3px);
  background-size: 28px 28px;
  background-position: center;
}
.flight-stage::before {
  /* fade the chart grid toward the edges */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 70% 80% at 50% 50%, transparent 30%, var(--paper) 95%);
}
.is-dragging .flight-stage { cursor: grabbing; }
.flight-label { position: absolute; top: 1.25rem; color: var(--ink-mute); z-index: 1; }
.flight-label.is-dep { left: var(--gutter); }
.flight-label.is-arr { right: var(--gutter); }
.flight-scale {
  position: absolute; left: var(--gutter); right: var(--gutter); bottom: 0; height: 10px;
  background:
    repeating-linear-gradient(90deg, var(--rule-strong) 0 1px, transparent 1px 10%) bottom / 100% 10px no-repeat,
    repeating-linear-gradient(90deg, var(--rule) 0 1px, transparent 1px 2%) bottom / 100% 5px no-repeat;
}

.flight-line {
  position: relative; z-index: 1;
  font-family: var(--font-display);
  font-weight: 370;
  font-variation-settings: "opsz" 40;
  letter-spacing: -0.03em;
  line-height: 1.15;
  white-space: pre;
  transition: opacity 0.6s var(--ease), transform 0.9s var(--ease), filter 0.6s var(--ease);
}
.flight-line.is-leaving { opacity: 0; transform: translateY(-0.15em); filter: blur(8px); }
.flight-line.is-entering { opacity: 0; transform: translateY(0.15em); filter: blur(8px); transition: none; }
.flight-probe { position: absolute; visibility: hidden; white-space: pre; }
.flight-line .run { color: var(--ink); }
.flight-line .seg {
  position: relative; display: inline-block; vertical-align: top;
  height: 1.15em;
  transition: width 0.8s var(--ease);
}
.flight-line .seg > span {
  position: absolute; left: 0; top: 0; white-space: pre;
  transition: opacity 0.5s var(--ease), transform 0.8s var(--ease), filter 0.6s var(--ease);
}
.flight-line .from {
  color: var(--ink-mute);
  text-decoration: underline wavy var(--signal);
  text-decoration-thickness: max(1.5px, 0.025em);
  text-decoration-skip-ink: none;
  text-underline-offset: 0.14em;
}
.flight-line .to { color: var(--ink); opacity: 0; transform: translateY(0.28em); filter: blur(6px); }
.flight-line .to::after {
  /* proof mark that stays under every repair */
  content: ""; position: absolute; left: 0; right: 0; bottom: 0.08em; height: max(2px, 0.03em);
  background: var(--signal);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.9s var(--ease) 0.15s;
}
.flight-line .is-fixed .from { opacity: 0; transform: translateY(-0.28em); filter: blur(6px); }
.flight-line .is-fixed .to { opacity: 1; transform: none; filter: none; }
.flight-line .is-fixed .to::after { transform: scaleX(1); }

.flight-plane {
  position: absolute; left: 0; z-index: 3;
  aspect-ratio: 1;
  will-change: transform;
  touch-action: none;
  cursor: inherit;
}
.flight-plane svg {
  width: 100%; height: 100%;
  fill: var(--signal);
  filter: drop-shadow(-0.5rem 0.9rem 0.5rem oklch(0.2 0.014 262 / 0.16));
}
.flight-trail {
  position: absolute; left: 0; z-index: 2; height: 0; pointer-events: none;
  transition: opacity 1.2s var(--ease);
}
.flight-trail::before, .flight-trail::after {
  content: ""; position: absolute; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, oklch(0.645 0.215 38 / 0.55) 75%, oklch(0.645 0.215 38 / 0.8));
}
.flight-trail::before { top: -5px; }
.flight-trail::after { top: 4px; }
.is-landed .flight-trail { opacity: 0; }

.flight-strip {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 2.5rem;
  padding: 1rem var(--gutter);
  border-top: 1px solid var(--rule);
  color: var(--ink-mute);
}
.flight-strip b { font-weight: 500; color: var(--ink); margin-left: 0.5rem; }
.flight-hint { color: var(--signal); }
.flight-pager { display: flex; gap: 0.25rem; margin-left: auto; }
.flight-pager button {
  padding: 0.35rem 0.5rem;
  font: inherit; letter-spacing: inherit; color: var(--ink-mute);
  background: linear-gradient(var(--signal), var(--signal)) 50% 100% / 0 1px no-repeat;
  transition: color 0.4s, background-size 0.7s var(--ease);
}
.flight-pager button:hover { color: var(--ink); }
.flight-pager button[aria-current="true"] { color: var(--ink); background-size: 100% 1px; }

@media (max-width: 60rem) {
  .hero h1 { grid-column: 1 / -1; }
  .hero-side { grid-column: 1 / -1; margin-top: 2rem; max-width: 36rem; }
}
@media (max-width: 40rem) {
  .flight-label { display: none; }
  .flight-hint { display: none; }
  .flight-pager { margin-left: 0; width: 100%; }
}

/* ==========================================================================
   Arrivals board
   ========================================================================== */

.board {
  --cell: clamp(0.78rem, 0.55rem + 0.42vw, 1.02rem);
  background: var(--board);
  color: var(--board-text);
  border-radius: 6px;
  box-shadow: 0 1px 0 oklch(1 0 0 / 0.06) inset, 0 40px 80px -40px oklch(0.2 0.014 262 / 0.55);
  overflow: hidden;
}
.board-top, .board-head, .board-foot {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  padding: 1rem clamp(1rem, 2.5vw, 1.75rem);
  color: oklch(0.93 0.012 90 / 0.55);
}
.board-top { border-bottom: 1px solid oklch(1 0 0 / 0.08); }
.board-title { color: var(--board-amber); }
.board-title i { font-style: normal; opacity: 0.5; }
.board-meta { display: flex; gap: 2rem; }
.board-meta [data-board-clock] { color: var(--board-text); font-variant-numeric: tabular-nums; }

.board-head, .board-row {
  display: grid;
  grid-template-columns: 5.5rem minmax(10rem, 1fr) auto 4.5rem auto;
  column-gap: clamp(1rem, 2vw, 2rem);
  align-items: center;
}
.board-head { padding-block: 0.75rem; }
.board-rows { padding: 0 clamp(1rem, 2.5vw, 1.75rem); }
.board-row {
  padding-block: 0.45rem;
  border-top: 1px solid oklch(1 0 0 / 0.06);
  font-family: var(--font-data);
  font-size: var(--cell);
}
.b-ref { color: oklch(0.93 0.012 90 / 0.5); font-size: 0.8em; letter-spacing: 0.04em; }
.b-from {
  color: oklch(0.93 0.012 90 / 0.42);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  text-decoration: line-through oklch(0.645 0.215 38 / 0.6);
  font-size: 0.85em;
}
.b-time { color: oklch(0.93 0.012 90 / 0.6); font-variant-numeric: tabular-nums; text-align: right; font-size: 0.85em; }
.b-to, .b-status { display: flex; gap: 2px; }
.flap {
  position: relative;
  display: grid; place-items: center;
  width: 1.18em; height: 1.7em;
  background: linear-gradient(var(--board-flap) 0 50%, oklch(0.25 0.008 262) 50%);
  border-radius: 2px;
  color: var(--board-text);
  white-space: pre;
  transform-origin: 50% 50%;
}
.flap::after {
  /* the hinge */
  content: ""; position: absolute; left: 0; right: 0; top: 50%; height: 1px;
  background: oklch(0 0 0 / 0.55);
}
.flap.is-flipping { animation: flap 64ms cubic-bezier(0.3, 0, 0.2, 1); }
@keyframes flap {
  from { transform: perspective(12em) rotateX(55deg); filter: brightness(1.5); }
  to { transform: none; filter: none; }
}
.b-status .flap { color: oklch(0.93 0.012 90 / 0.5); transition: color 0.6s var(--ease); }
.is-landed .b-status .flap { color: var(--board-amber); }

.board-foot { border-top: 1px solid oklch(1 0 0 / 0.08); margin-top: 0.5rem; flex-wrap: wrap; }
.board-link { color: var(--board-text); transition: color 0.3s; }
.board-link:hover { color: var(--board-amber); }

@media (max-width: 72rem) {
  .board-head, .board-row { grid-template-columns: 4.5rem auto 4rem; }
  .board-head span:nth-child(2), .b-from, .board-head span:nth-child(5), .b-status { display: none; }
}
@media (max-width: 40rem) {
  .board { --cell: 0.7rem; margin-inline: calc(var(--gutter) * -1); border-radius: 0; }
  .board-head, .board-row { grid-template-columns: auto; row-gap: 0.4rem; }
  .board-head { display: none; }
  .b-ref, .b-time { display: inline; }
  .board-row { grid-template-areas: "ref" "to" "time"; }
  .b-time { text-align: left; }
  .flap { width: 1.1em; }
}

/* ==========================================================================
   Figures
   ========================================================================== */

.figures { padding-bottom: 0; }
.figures-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); column-gap: var(--gutter); }
.figure { display: flex; flex-direction: column; gap: 0.9rem; padding-top: 1.25rem; border-top: 1px solid var(--ink); }
.figure dt { font-weight: 500; }
.figure dd {
  order: -1;
  display: flex; align-items: baseline; gap: 0.15em;
  font-family: var(--font-display); font-weight: 330; font-variation-settings: "opsz" 40;
  font-size: clamp(3.2rem, 1.8rem + 3.6vw, 5.6rem);
  letter-spacing: -0.045em; line-height: 0.9;
  font-variant-numeric: tabular-nums lining-nums;
}
.figure dd small { font-size: 0.34em; letter-spacing: 0; color: var(--signal); font-weight: 400; }
.figure p { color: var(--ink-soft); font-size: 0.95rem; max-width: 18rem; }
.figures-note { margin-top: 2.5rem; color: var(--ink-mute); }
.figures-note .link { text-transform: none; letter-spacing: 0; font-family: var(--font-text); font-size: 0.9rem; color: var(--ink); margin-left: 0.5rem; }

@media (max-width: 60rem) { .figures-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 3rem; } }

/* ==========================================================================
   Method — sticky scroll sequence
   ========================================================================== */

.method { padding-bottom: 0; }
.method-track { height: 320vh; position: relative; }
.method-sticky {
  position: sticky; top: 4.25rem;
  height: calc(100vh - 4.25rem); height: calc(100svh - 4.25rem);
  display: flex; align-items: center;
}
.method-grid {
  display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: var(--gutter);
  align-items: center;
}
.method-steps { display: grid; gap: 0.25rem; }
.method-steps li {
  display: grid; grid-template-columns: 2.5rem 1fr;
  padding: 1.25rem 0; border-top: 1px solid var(--rule);
  color: var(--ink-mute);
  transition: color 0.8s var(--ease);
}
.method-steps li .data { padding-top: 0.35rem; }
.method-steps h3 { transition: color 0.8s var(--ease); }
.method-steps p {
  font-size: 0.98rem; max-width: 26rem;
  max-height: 0; margin-top: 0; overflow: hidden; opacity: 0;
  transition: opacity 0.8s var(--ease), max-height 0.9s var(--ease), margin 0.9s var(--ease);
}
.method-steps li.is-active { color: var(--ink); border-top-color: var(--ink); }
.method-steps li.is-active .data { color: var(--signal); }
.method-steps li.is-active p { opacity: 1; max-height: 10rem; margin-top: 0.6rem; color: var(--ink-soft); }

.method-figure {
  position: relative;
  padding: clamp(5rem, 10vw, 8rem) clamp(1.5rem, 4vw, 3.5rem) clamp(3rem, 6vw, 4.5rem);
  border: 1px solid var(--rule-strong);
  background:
    radial-gradient(var(--rule) 1px, transparent 1.3px) center / 22px 22px,
    oklch(0.985 0.006 85);
}
.method-ref { position: absolute; top: 1.25rem; left: 1.5rem; color: var(--ink-mute); }
.method-sentence {
  position: relative; z-index: 1;
  font-family: var(--font-display); font-weight: 370; font-variation-settings: "opsz" 40;
  font-size: clamp(1.8rem, 1rem + 2.6vw, 3.4rem);
  line-height: 1.35; letter-spacing: -0.025em;
}
.tok { display: inline-block; white-space: pre; transition: color 0.8s var(--ease), background-color 0.8s var(--ease); }
.tok.is-bad {
  position: relative; vertical-align: top; height: 1.35em;
  transition: width 0.9s var(--ease), background-color 0.8s var(--ease);
}
.tok.is-bad > span {
  position: absolute; left: 0; top: 0; white-space: pre;
  transition: opacity 0.6s var(--ease), transform 0.9s var(--ease), filter 0.6s var(--ease);
}
.tok.is-measuring > span { position: static; }
.tok .from {
  color: var(--ink-mute);
  text-decoration: underline wavy transparent;
  text-decoration-thickness: max(1.5px, 0.03em);
  text-underline-offset: 0.16em;
  text-decoration-skip-ink: none;
  transition: text-decoration-color 0.8s var(--ease), opacity 0.6s var(--ease), transform 0.9s var(--ease), filter 0.6s var(--ease);
}
.tok .to { opacity: 0; transform: translateY(0.3em); filter: blur(6px); }
.tok .to::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0.1em; height: max(2px, 0.04em);
  background: var(--signal); transform: scaleX(0); transform-origin: left;
  transition: transform 0.9s var(--ease) 0.2s;
}

[data-step="0"] .tok .from, [data-step="1"] .tok .from { text-decoration-color: var(--signal); }
[data-step="1"] .tok:not(.is-bad) { color: var(--chart); }
[data-step="1"] .tok[data-tok="c"] { background: var(--signal-wash); }
[data-step="2"] .tok .from { opacity: 0; transform: translateY(-0.3em); filter: blur(6px); }
[data-step="2"] .tok .to { opacity: 1; transform: none; filter: none; }
[data-step="2"] .tok .to::after { transform: scaleX(1); }

.method-arcs { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; pointer-events: none; }
.method-arcs path {
  fill: none; stroke: var(--chart); stroke-width: 1.25;
  stroke-dasharray: 1; stroke-dashoffset: 1;
  transition: stroke-dashoffset 1.2s var(--ease-travel);
  transition-delay: calc(var(--n) * 120ms);
}
.method-arcs circle { fill: var(--signal); opacity: 0; transition: opacity 0.6s; }
[data-step="1"] .method-arcs path { stroke-dashoffset: 0; }
[data-step="1"] .method-arcs circle { opacity: 1; }
[data-step="2"] .method-arcs, [data-step="0"] .method-arcs { opacity: 0; transition: opacity 0.5s; }

.method-progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; }
.method-progress i {
  display: block; height: 100%; background: var(--signal);
  transform-origin: left; transform: scaleX(var(--progress, 0));
}

@media (max-width: 60rem) {
  .method-track { height: 280vh; }
  .method-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .method-steps { order: 2; }
  .method-steps li { display: none; border-top: 1px solid var(--ink); }
  .method-steps li.is-active { display: grid; }
  .method-figure { padding-top: 4rem; }
}

/* ==========================================================================
   Benchmarks — flight routes
   ========================================================================== */

.routes { border-top: 1px solid var(--ink); }
.routes-top {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 1rem 0 1.5rem; color: var(--ink-mute);
}
.routes-clock b { font-weight: 500; color: var(--ink); font-size: 1.1rem; font-variant-numeric: tabular-nums; }
.routes-list { display: grid; }
.route {
  --p: 0;
  display: grid; grid-template-columns: 12rem minmax(0, 1fr) 9rem; align-items: center; gap: var(--gutter);
  padding-block: clamp(1.25rem, 2.6vw, 2rem);
  border-top: 1px solid var(--rule);
}
.route-name strong, .route-result strong {
  display: block;
  font-family: var(--font-display); font-weight: 400; font-variation-settings: "opsz" 40;
  font-size: var(--step-2); letter-spacing: -0.03em; line-height: 1.05;
  font-variant-numeric: tabular-nums;
}
.route-name span, .route-result span { color: var(--ink-mute); font-size: 0.9rem; }
.route-result { text-align: right; }
.route-result strong { color: var(--ink-mute); transition: color 0.6s var(--ease); }
.route.is-arrived .route-result strong { color: var(--ink); }
.route.is-lead.is-arrived .route-result strong { color: var(--signal); }

.route-path { position: relative; height: 2.5rem; }
.route-path::before {
  /* the planned route, as long as the variant's latency */
  content: ""; position: absolute; left: 0; top: 50%; height: 0;
  width: calc(var(--end, 1) * 100%);
  border-top: 1px dashed var(--rule-strong);
}
.route-path::after {
  /* departure point */
  content: ""; position: absolute; left: -4px; top: calc(50% - 4px); width: 8px; height: 8px;
  border-radius: 50%; background: var(--ink);
}
.route-flown {
  position: absolute; left: 0; right: 0; top: calc(50% - 0.5px); height: 1px;
  background: var(--ink);
  transform-origin: left; transform: scaleX(var(--p));
}
.route.is-lead .route-flown { background: var(--signal); height: 2px; top: calc(50% - 1px); }
.route-arr {
  position: absolute; left: calc(var(--end, 1) * 100% - 6px); top: calc(50% - 6px); width: 12px; height: 12px;
  border-radius: 50%; border: 1px solid var(--ink-mute); background: var(--paper);
  transition: background-color 0.5s var(--ease), border-color 0.5s var(--ease);
}
.route.is-arrived .route-arr { background: var(--ink); border-color: var(--ink); }
.route.is-lead.is-arrived .route-arr { background: var(--signal); border-color: var(--signal); }
.route-plane {
  position: absolute; top: 50%; left: calc(var(--p) * 100%);
  width: 1.9rem;
  transform: translate(-50%, -50%) rotate(90deg);
  transition: opacity 0.5s var(--ease);
}
.route-plane svg { fill: var(--ink); }
.route.is-lead .route-plane svg { fill: var(--signal); }
.route.is-arrived .route-plane { opacity: 0; }
.route.is-base { color: var(--ink-mute); }
.route.is-base .route-arr { display: none; }
.route.is-base .route-path::before { mask-image: linear-gradient(90deg, #000 70%, transparent); }
.route.is-base .route-plane svg { fill: var(--ink-mute); }

.routes-scale {
  display: flex; justify-content: space-between;
  margin-left: calc(12rem + var(--gutter)); margin-right: calc(9rem + var(--gutter));
  padding-top: 0.75rem; border-top: 1px solid var(--rule);
  color: var(--ink-mute);
}

.facts {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); column-gap: var(--gutter);
  margin-top: clamp(4rem, 8vw, 6rem);
}
.facts > div { padding-top: 1rem; border-top: 1px solid var(--rule-strong); }
.facts dt { color: var(--ink-mute); font-size: 0.9rem; }
.facts dd {
  font-family: var(--font-display); font-weight: 380; font-variation-settings: "opsz" 40;
  font-size: var(--step-2); letter-spacing: -0.03em; margin: 0.35rem 0 0.25rem;
}
.facts p { color: var(--ink-soft); font-size: 0.92rem; }
.facts-note { margin-top: 2rem; color: var(--ink-mute); }

@media (max-width: 60rem) {
  .route { grid-template-columns: 1fr auto; row-gap: 0.75rem; }
  .route-path { grid-column: 1 / -1; grid-row: 2; }
  .routes-scale { margin: 0; }
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 2rem; }
}

/* ==========================================================================
   Evidence — 900-square ledger
   ========================================================================== */

.ledger {
  display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: var(--gutter);
  align-items: start;
}
.ledger-side { display: grid; gap: 2rem; justify-items: start; position: sticky; top: 6rem; }
.ledger-keys { display: grid; width: 100%; border-top: 1px solid var(--ink); }
.ledger-key {
  display: grid; grid-template-columns: 0.9rem 3.2rem 1fr auto; align-items: center; gap: 0.9rem;
  padding: 0.85rem 0; border-bottom: 1px solid var(--rule);
  text-align: left;
  transition: opacity 0.5s var(--ease);
}
.ledger-key b { font-family: var(--font-display); font-weight: 400; font-size: 1.5rem; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.ledger-key span { color: var(--ink-soft); }
.ledger-key em { font-style: normal; font-family: var(--font-data); font-size: 0.75rem; color: var(--ink-mute); }
.ledger-key[aria-pressed="true"] span { color: var(--ink); text-decoration: underline; text-underline-offset: 0.25em; }
.ledger[data-focus] .ledger-key:not([data-key]) { opacity: 1; }
.swatch { width: 0.9rem; height: 0.9rem; }
.is-exact { --swatch: var(--ink); }
.is-improved { --swatch: var(--chart); }
.is-over { --swatch: var(--signal); }
.is-other { --swatch: oklch(0.2 0.014 262 / 0.2); }
.swatch { background: var(--swatch); }

.ledger-inspector {
  width: 100%; min-height: 7.25rem;
  padding: 1rem 1.1rem;
  background: oklch(0.985 0.006 85);
  border: 1px solid var(--rule-strong);
  display: grid; gap: 0.6rem; align-content: start;
}
.ledger-inspector [data-ins-head] { color: var(--ink-mute); }
.ledger-inspector [data-ins-head] b { color: var(--signal); font-weight: 500; }
.ins-line { display: grid; grid-template-columns: 3.4rem 1fr; gap: 0.5rem; font-size: 0.95rem; line-height: 1.4; }
.ins-line .data { color: var(--ink-mute); padding-top: 0.2rem; }
.ins-line:first-of-type + .ins-line span:last-child { font-family: var(--font-display); font-size: 1.05rem; }
.ins-line [data-ins-input] { color: var(--ink-soft); }

.ledger-grid {
  display: grid; grid-template-columns: repeat(30, minmax(0, 1fr)); gap: 3px;
}
.ledger-grid i {
  aspect-ratio: 1;
  background: var(--swatch);
  opacity: 0;
  transition: opacity 0.9s var(--ease), transform 0.6s var(--ease);
  transition-delay: calc(var(--c) * 28ms);
}
.ledger-grid.is-in i { opacity: 1; }
.ledger-grid i { cursor: crosshair; }
.ledger-grid i.is-hover { transform: scale(1.8); transition-delay: 0s; position: relative; z-index: 1; outline: 2px solid var(--paper); box-shadow: 0 0 0 1px var(--ink); }
.ins-line span:last-child { overflow-wrap: anywhere; }
html:not(.js) .ledger-grid i { opacity: 1; }
.ledger[data-focus] .ledger-grid i { transition-delay: 0s; }
.ledger[data-focus="exact"] .ledger-grid i:not(.is-exact),
.ledger[data-focus="improved"] .ledger-grid i:not(.is-improved),
.ledger[data-focus="over"] .ledger-grid i:not(.is-over),
.ledger[data-focus="other"] .ledger-grid i:not(.is-other) { opacity: 0.12; }
.ledger[data-focus="exact"] .ledger-key:not([data-key="exact"]),
.ledger[data-focus="improved"] .ledger-key:not([data-key="improved"]),
.ledger[data-focus="over"] .ledger-key:not([data-key="over"]),
.ledger[data-focus="other"] .ledger-key:not([data-key="other"]) { opacity: 0.4; }

@media (max-width: 60rem) {
  .ledger { grid-template-columns: 1fr; }
  .ledger-side { position: static; }
  .ledger-grid { gap: 2px; order: -1; }
}

/* ==========================================================================
   On device
   ========================================================================== */

.local-grid {
  display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 6fr); gap: var(--gutter); align-items: end;
}
.local-grid h2 { margin: 2rem 0 1.75rem; }
.spec { border-top: 1px solid var(--ink); }
.spec div {
  display: grid; grid-template-columns: 11rem 1fr; gap: 1rem; align-items: baseline;
  padding: 0.95rem 0; border-bottom: 1px solid var(--rule);
}
.spec dt { color: var(--ink-mute); }
.spec dd b { font-family: var(--font-display); font-weight: 400; font-size: 2.2rem; line-height: 1; }
.is-signal { color: var(--signal); }

@media (max-width: 60rem) {
  .local-grid { grid-template-columns: 1fr; }
  .spec div { grid-template-columns: 9rem 1fr; }
}

/* ==========================================================================
   Lineage — four waypoints, one drawn route
   ========================================================================== */

.lineage-chart { margin-top: 0.5rem; }
.lineage-svg { width: 100%; height: auto; overflow: visible; }
.lineage-track, .lineage-flown { fill: none; }
.lineage-track { stroke: var(--rule-strong); stroke-width: 1.25; stroke-dasharray: 5 7; }
.lineage-flown { stroke: var(--signal); stroke-width: 2; stroke-dasharray: 1; stroke-dashoffset: 1; }
.lineage-chart [data-lineage-plane] { fill: var(--signal); }
.lineage-stops {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  column-gap: var(--gutter); margin-top: 0.5rem;
}
.lineage-stops li {
  padding-top: 1rem; border-top: 1px solid var(--rule);
  color: var(--ink-mute);
  transition: color 0.7s var(--ease), border-color 0.7s var(--ease);
}
.lineage-stops .data { display: block; }
.lineage-stops strong {
  display: block; margin: 0.45rem 0 0.4rem;
  font-family: var(--font-display); font-weight: 450; font-size: 1.45rem;
  letter-spacing: -0.02em; color: inherit;
}
.lineage-stops p { font-size: 0.92rem; color: var(--ink-mute); max-width: 22rem; transition: color 0.7s var(--ease); }
.lineage-stops li.is-passed { color: var(--ink); border-top-color: var(--ink); }
.lineage-stops li.is-passed p { color: var(--ink-soft); }
.lineage-stops li.is-selected.is-passed { border-top-color: var(--signal); }
.lineage-stops li.is-selected.is-passed .data { color: var(--signal); }

@media (max-width: 60rem) {
  .lineage-stops { grid-template-columns: 1fr 1fr; row-gap: 1.75rem; }
}
@media (max-width: 40rem) {
  .lineage-stops { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Closing
   ========================================================================== */

.closing { padding-block: clamp(5rem, 12vw, 9rem) clamp(6rem, 14vw, 11rem); }
.closing-meta {
  display: flex; justify-content: space-between; gap: 1rem;
  padding-bottom: 1rem; border-bottom: 1px solid var(--rule-strong); color: var(--ink-mute);
}
.closing-meta span:last-child { color: var(--signal); }
.closing h2 {
  max-width: 12ch; margin-top: clamp(2rem, 5vw, 3.5rem);
  font-size: var(--step-4); font-weight: 350; letter-spacing: -0.04em; line-height: 0.96;
}
.closing h2 em { color: var(--signal); }
.closing-lede { margin-top: 1.75rem; }
.closing-runway {
  position: relative; height: 3.25rem; margin-top: clamp(2.5rem, 6vw, 4rem);
  container-type: inline-size;
}
.closing-runway::before {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0.7rem; height: 0;
  border-top: 1px dashed var(--rule-strong);
}
.closing-runway b {
  position: absolute; left: 0; bottom: 0.7rem; height: 1px; width: 100%;
  background: var(--signal); transform: scaleX(0); transform-origin: left;
}
.closing-runway.is-in b { transform: scaleX(1); transition: transform 2.6s var(--ease-travel) 0.15s; }
.closing-plane { position: absolute; left: 0; bottom: 0; width: 1.7rem; z-index: 1; }
.closing-plane svg { width: 100%; fill: var(--signal); transform: rotate(90deg); }
.closing-runway.is-in .closing-plane { animation: depart 2.6s var(--ease-travel) 0.15s both; }
@keyframes depart {
  from { transform: translateX(0); }
  to { transform: translateX(calc(100cqi - 1.7rem)); }
}
.closing-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1.5rem; margin-top: 2.25rem; }

/* ==========================================================================
   Research record
   ========================================================================== */

.shell { width: min(100% - 2 * var(--gutter), var(--wrap)); margin-inline: auto; }
.research-hero { padding-top: clamp(3.5rem, 8vw, 7rem); }
.eyebrow {
  font-family: var(--font-data); font-size: 0.72rem; font-weight: 450;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-mute);
  padding-bottom: 1rem; border-bottom: 1px solid var(--rule-strong);
}
.eyebrow.is-live::before {
  content: ""; display: inline-block; width: 0.45rem; height: 0.45rem;
  margin-right: 0.65rem; background: var(--signal); vertical-align: 0.05em;
}
.research-hero h1 {
  max-width: 12ch; margin-top: clamp(2rem, 5vw, 3.25rem);
  font-size: var(--step-4); font-weight: 350; letter-spacing: -0.04em; line-height: 0.96;
}
.research-hero h1 em { color: var(--signal); }
.research-hero-copy {
  display: grid; grid-template-columns: minmax(0, 36rem) minmax(12rem, 1fr);
  gap: 2rem 3rem; align-items: end; margin-top: 2rem;
}
.research-hero-copy > p { color: var(--ink-soft); font-size: var(--step-1); line-height: 1.45; }
.research-jump { display: flex; flex-wrap: wrap; gap: 0.65rem 1.25rem; justify-content: flex-end; }
.research-jump a {
  color: var(--ink-soft); padding-bottom: 0.15rem;
  background: linear-gradient(currentColor, currentColor) 0 100% / 100% 1px no-repeat;
  transition: color 0.3s;
}
.research-jump a:hover { color: var(--signal); }

.research-summary { margin-top: clamp(3.5rem, 7vw, 5.5rem); }
.summary-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); column-gap: var(--gutter); }
.summary-grid > div { padding-top: 1rem; border-top: 1px solid var(--ink); }
.summary-grid dt, .mono {
  font-family: var(--font-data); font-size: 0.72rem; font-weight: 450;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-mute);
}
.summary-grid dd {
  font-family: var(--font-display); font-weight: 380; font-variation-settings: "opsz" 40;
  font-size: clamp(1.7rem, 1.2rem + 1.1vw, 2.35rem);
  letter-spacing: -0.03em; line-height: 1.05; margin: 0.55rem 0 0.4rem;
}
.summary-grid small { color: var(--ink-soft); }

.research-shell {
  display: grid; grid-template-columns: 13.5rem minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 4.5rem); align-items: start;
  margin-top: clamp(4rem, 8vw, 6.5rem);
  padding-bottom: clamp(4rem, 8vw, 7rem);
}
.research-sidebar { position: sticky; top: 5.75rem; }
.research-sidebar > p { color: var(--ink-mute); margin-bottom: 0.85rem; }
.research-sidebar nav { display: grid; }
.research-sidebar a {
  color: var(--ink-soft); font-size: 0.95rem;
  padding: 0.38rem 0 0.38rem 0.85rem; border-left: 1px solid var(--rule);
  transition: color 0.3s, border-color 0.3s;
}
.research-sidebar a:hover { color: var(--ink); }
.research-sidebar a[aria-current="true"] { color: var(--ink); border-left-color: var(--signal); }

.research-section { padding-top: clamp(3.5rem, 7vw, 5.5rem); }
.research-section:first-child { padding-top: 0; }
.research-heading { display: grid; gap: 0.7rem; margin-bottom: 1.35rem; }
.research-heading span {
  font-family: var(--font-data); font-size: 0.72rem; font-weight: 450;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--signal);
}
.research-heading h2 { font-size: clamp(2rem, 1.3rem + 2.1vw, 3.15rem); max-width: 18ch; }
.research-article .lead, .research-article p { color: var(--ink-soft); max-width: 42rem; }
.research-article .lead { font-size: var(--step-1); line-height: 1.45; }
.research-article p + p { margin-top: 0.9rem; }
.research-heading + p, .research-heading + .lead { margin-top: 0; }

.model-specimen { margin-top: 2rem; border: 1px solid var(--rule-strong); background: oklch(0.985 0.006 85); }
.specimen-title {
  display: flex; justify-content: space-between; gap: 1rem; align-items: baseline;
  padding: 0.9rem 1.15rem; border-bottom: 1px solid var(--rule);
  font-family: var(--font-data); font-size: 0.75rem; letter-spacing: 0.04em; text-transform: uppercase;
}
.specimen-title i { font-style: normal; color: var(--signal); }
.model-specimen dl { display: grid; grid-template-columns: 1fr 1fr; }
.model-specimen dl div {
  display: flex; justify-content: space-between; gap: 1rem; align-items: baseline;
  padding: 0.85rem 1.15rem; border-top: 1px solid var(--rule);
}
.model-specimen dl div:nth-child(-n + 2) { border-top: 0; }
.model-specimen dt { color: var(--ink-mute); }
.model-specimen dd { font-variant-numeric: tabular-nums; text-align: right; }

.research-timeline { margin-top: 2rem; }
.research-timeline article {
  display: grid; grid-template-columns: 11rem minmax(0, 1fr); gap: 1.25rem 1.75rem;
  position: relative; padding: 0 0 1.6rem 1.35rem; border-left: 1px solid var(--rule-strong);
}
.research-timeline article::before {
  content: ""; position: absolute; left: -4px; top: 0.35rem;
  width: 7px; height: 7px; background: var(--paper); border: 1px solid var(--ink);
}
.research-timeline article:last-child { padding-bottom: 0; }
.research-timeline article:last-child::before { background: var(--signal); border-color: var(--signal); }
.research-timeline article > span {
  font-family: var(--font-data); font-size: 0.72rem; font-weight: 450;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-mute); padding-top: 0.15rem;
}
.research-timeline h3 { margin-bottom: 0.35rem; }
.research-timeline p { max-width: 38rem; }

.evaluation-block { margin-top: 2.75rem; padding-top: 1.5rem; border-top: 1px solid var(--rule-strong); }
.evaluation-block header {
  display: flex; justify-content: space-between; align-items: end; gap: 1rem; margin-bottom: 1.35rem;
}
.evaluation-block header span {
  display: block; margin-bottom: 0.35rem;
  font-family: var(--font-data); font-size: 0.72rem; font-weight: 450;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--signal);
}
.evaluation-block header p { color: var(--ink-mute); font-variant-numeric: tabular-nums; }
.evaluation-hero { display: flex; justify-content: space-between; align-items: end; gap: 2rem; }
.evaluation-hero strong {
  display: block;
  font-family: var(--font-display); font-weight: 340; font-variation-settings: "opsz" 40;
  font-size: clamp(3.2rem, 2rem + 3.2vw, 5rem);
  letter-spacing: -0.045em; line-height: 0.88;
}
.evaluation-hero strong + span { display: block; margin-top: 0.45rem; color: var(--ink-mute); }
.evaluation-hero > p { max-width: 28rem; align-self: center; }
.cer-route {
  display: grid; grid-template-columns: auto minmax(8rem, 16rem) auto;
  gap: 0.9rem; align-items: center; color: var(--ink-mute); font-size: 0.92rem;
  font-variant-numeric: tabular-nums;
}
.cer-route i { position: relative; height: 1px; background: var(--rule-strong); }
.cer-route b {
  position: absolute; left: 0; top: -1px; height: 3px; width: 100%;
  background: linear-gradient(90deg, var(--ink-mute), var(--signal));
  transform: scaleX(0); transform-origin: left;
}
.is-in .cer-route b { transform: scaleX(1); transition: transform 1.4s var(--ease-travel); }
.evaluation-facts {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  column-gap: var(--gutter); margin-top: 1.75rem;
}
.evaluation-facts span {
  padding-top: 0.75rem; border-top: 1px solid var(--rule);
  color: var(--ink-soft); font-size: 0.92rem;
}
.evaluation-facts b {
  display: block; margin-bottom: 0.2rem;
  font-family: var(--font-display); font-weight: 450; font-size: 1.35rem;
  letter-spacing: -0.03em; color: var(--ink);
}
.category-chart { display: grid; gap: 0.7rem; margin-top: 0.4rem; }
.category-chart > div {
  display: grid; grid-template-columns: 11.5rem minmax(0, 1fr) 4.2rem;
  gap: 1rem; align-items: center;
}
.category-chart span { color: var(--ink-soft); }
.category-chart i { display: block; height: 2px; background: var(--rule); }
.category-chart b {
  display: block; height: 2px; width: var(--value); background: var(--ink);
  transform: scaleX(0); transform-origin: left;
}
.category-chart .weak b { background: var(--signal); }
.category-chart .weak strong { color: var(--signal); }
.is-in .category-chart b { transform: scaleX(1); transition: transform 1.2s var(--ease); }
.category-chart strong {
  font-family: var(--font-display); font-weight: 450; font-size: 1.2rem;
  letter-spacing: -0.03em; font-variant-numeric: tabular-nums; text-align: right;
}
.category-chart strong::after { content: "%"; font-size: 0.72em; color: var(--ink-mute); margin-left: 0.05em; }
.category-chart .weak strong::after { color: var(--signal); }
.research-link {
  display: inline-flex; align-items: center; gap: 0.45rem; margin-top: 1.4rem;
  font-weight: 500;
  background: linear-gradient(currentColor, currentColor) 0 100% / 100% 1px no-repeat;
  padding-bottom: 2px;
}
.research-link:hover { color: var(--signal); }
.scope-warning {
  margin-top: 1.35rem; max-width: none;
  padding: 0.9rem 1rem; border-left: 2px solid var(--signal); background: var(--paper-deep);
}
.scope-warning strong { color: var(--ink); font-weight: 600; }

.variant-table-wrap { margin-top: 1.75rem; overflow-x: auto; }
.variant-table { width: 100%; border-collapse: collapse; min-width: 36rem; }
.variant-table th {
  text-align: left; padding: 0 0.8rem 0.7rem 0;
  font-family: var(--font-data); font-size: 0.72rem; font-weight: 450;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-mute);
  border-bottom: 1px solid var(--ink);
}
.variant-table td { padding: 0.9rem 0.8rem 0.9rem 0; border-bottom: 1px solid var(--rule); font-variant-numeric: tabular-nums; }
.variant-table tr.selected td { background: var(--signal-wash); }
.variant-table tr.selected td:first-child { box-shadow: inset 2px 0 0 var(--signal); padding-left: 0.7rem; color: var(--ink); font-weight: 600; }
.table-caption { margin-top: 0.9rem; color: var(--ink-mute); font-size: 0.92rem; max-width: 46rem; }

.published-ranking { margin-top: 1.75rem; border-top: 1px solid var(--ink); }
.published-ranking > div {
  display: grid; grid-template-columns: 6.5rem minmax(0, 1fr); gap: 0.5rem 1rem; align-items: baseline;
  padding: 0.85rem 0; border-bottom: 1px solid var(--rule);
}
.published-ranking span {
  font-family: var(--font-data); font-size: 0.75rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink-mute);
}
.published-ranking strong { font-family: var(--font-display); font-weight: 450; font-size: 1.45rem; letter-spacing: -0.02em; }
.published-ranking i { grid-column: 2; font-style: normal; color: var(--ink-soft); }
.published-ranking .candidate {
  margin-top: 1.25rem; padding: 1rem 1rem 1rem 0.9rem;
  border: 1px solid var(--rule-strong); border-left: 2px solid var(--signal); border-bottom: 1px solid var(--rule-strong);
  background: var(--signal-wash);
}
.published-ranking .candidate span { color: var(--signal); }
.source-note { margin-top: 1.1rem; color: var(--ink-mute); font-size: 0.92rem; max-width: 46rem; }
.source-note a { text-decoration: underline; text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
.source-note a:hover { color: var(--signal); }

.limitations-list {
  display: grid; grid-template-columns: 1fr 1fr; margin-top: 1.75rem;
  border-top: 1px solid var(--ink);
}
.limitations-list article { padding: 1.2rem 1.75rem 1.2rem 0; border-bottom: 1px solid var(--rule); }
.limitations-list article:nth-child(odd) { border-right: 1px solid var(--rule); padding-right: 1.75rem; }
.limitations-list article:nth-child(even) { padding-left: 1.75rem; }
.limitations-list p { margin-top: 0.4rem; }

.method-list { margin-top: 0.5rem; }
.method-list div {
  display: grid; grid-template-columns: 13rem minmax(0, 1fr); gap: 1rem 1.5rem;
  padding: 1rem 0; border-top: 1px solid var(--rule);
}
.method-list dt { font-weight: 560; padding-top: 0.1rem; }
.method-list dd { color: var(--ink-soft); }

.artifact-links { margin-top: 1.5rem; border-top: 1px solid var(--ink); }
.artifact-links a {
  display: grid; grid-template-columns: 14rem minmax(0, 1fr) auto;
  gap: 1rem; align-items: baseline; padding: 1rem 0; border-bottom: 1px solid var(--rule);
}
.artifact-links span {
  font-family: var(--font-data); font-size: 0.72rem; font-weight: 450;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-mute);
}
.artifact-links strong { font-family: var(--font-display); font-weight: 450; font-size: 1.45rem; letter-spacing: -0.02em; }
.artifact-links i { font-style: normal; color: var(--ink-mute); }
.artifact-links a:hover strong { color: var(--signal); }

@media (max-width: 60rem) {
  .research-hero-copy, .summary-grid, .research-shell, .model-specimen dl,
  .research-timeline article, .evaluation-facts, .limitations-list, .method-list div, .artifact-links a {
    grid-template-columns: 1fr;
  }
  .research-jump { justify-content: flex-start; }
  .research-shell { grid-template-columns: minmax(0, 1fr); }
  .research-sidebar, .research-article, .research-sidebar nav { min-width: 0; }
  .research-sidebar { position: sticky; top: 4.25rem; z-index: 4; background: oklch(0.972 0.009 85 / 0.94); padding-bottom: 0.6rem; }
  .research-sidebar nav { display: flex; gap: 1rem; overflow-x: auto; max-width: 100%; }
  .research-sidebar a { white-space: nowrap; border-left: 0; border-bottom: 1px solid transparent; padding: 0.35rem 0; }
  .research-sidebar a[aria-current="true"] { border-bottom-color: var(--signal); }
  .research-timeline article { padding-left: 1.1rem; }
  .evaluation-hero, .category-chart > div { display: grid; grid-template-columns: 1fr; }
  .category-chart strong { text-align: left; }
  .cer-route { grid-template-columns: 1fr; gap: 0.4rem; }
  .limitations-list article, .limitations-list article:nth-child(odd), .limitations-list article:nth-child(even) {
    border-right: 0; padding-left: 0; padding-right: 0;
  }
  .evaluation-facts { grid-template-columns: 1fr 1fr; row-gap: 1.25rem; }
  .summary-grid { grid-template-columns: 1fr 1fr; row-gap: 1.75rem; }
  .published-ranking i { grid-column: 1; }
}