:root {
  --ink: #171512;
  --paper: #e8e3d6;
  --paper-hi: #f3efe5;
  --paper-dim: #c7c0b0;
  --amber: #ffb000;
  --amber-deep: #bb7100;
  --red: #ff4a37;
  --cyan: #70d5d1;
  --night: #0e0f0f;
  --night-2: #161715;
  --line: rgba(23, 21, 18, .22);
  --line-light: rgba(232, 227, 214, .18);
  --mono: "SFMono-Regular", "Roboto Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: Iowan Old Style, "Palatino Linotype", Palatino, "Times New Roman", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}
a { color: inherit; }
button, input { font: inherit; }
:focus-visible { outline: 3px solid var(--cyan); outline-offset: 4px; }
.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 100;
  padding: 12px 16px;
  background: var(--paper-hi);
  color: var(--ink);
  font: 700 12px var(--mono);
}
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: minmax(230px, 1fr) auto minmax(230px, 1fr);
  align-items: center;
  min-height: 68px;
  padding: 0 28px;
  color: var(--paper);
  background: rgba(14, 15, 15, .94);
  border-bottom: 1px solid var(--line-light);
  backdrop-filter: blur(14px);
}
.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font: 800 14px/1 var(--mono);
  letter-spacing: .16em;
}
.wordmark-stamp {
  display: grid;
  place-items: center;
  width: 31px;
  height: 31px;
  color: var(--night);
  background: var(--amber);
  clip-path: polygon(0 8%, 87% 0, 100% 86%, 12% 100%);
  font-size: 16px;
}
.wordmark small {
  margin-left: 5px;
  color: #89877f;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: .12em;
}
.site-nav { display: flex; gap: 28px; }
.site-nav a, .site-footer nav a {
  color: #aaa79f;
  font: 650 10px var(--mono);
  letter-spacing: .11em;
  text-decoration: none;
  text-transform: uppercase;
}
.site-nav a:hover, .site-footer nav a:hover { color: var(--paper); }
.header-action {
  justify-self: end;
  padding: 10px 13px;
  color: var(--night);
  background: var(--paper);
  font: 800 10px var(--mono);
  letter-spacing: .09em;
  text-decoration: none;
  text-transform: uppercase;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: 64px minmax(380px, .92fr) minmax(480px, 1.08fr);
  min-height: calc(100vh - 68px);
  color: var(--paper);
  background:
    linear-gradient(90deg, transparent 63px, rgba(255, 176, 0, .22) 64px, transparent 65px),
    radial-gradient(circle at 78% 35%, rgba(255, 176, 0, .09), transparent 36%),
    var(--night);
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .28;
  background-image: repeating-linear-gradient(90deg, transparent 0 119px, rgba(232, 227, 214, .055) 120px);
}
.case-spine {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0;
  border-right: 1px solid var(--line-light);
}
.case-spine span {
  color: #8e8c84;
  font: 600 8px var(--mono);
  letter-spacing: .18em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}
.case-spine i { width: 1px; flex: 1; margin: 20px 0; background: linear-gradient(var(--amber), transparent); }
.hero-copy {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 9vh clamp(34px, 5vw, 82px) 7vh;
}
.kicker, .folio, .node-label {
  margin: 0 0 23px;
  color: var(--amber-deep);
  font: 750 10px var(--mono);
  letter-spacing: .18em;
  text-transform: uppercase;
}
.kicker { color: var(--amber); }
.kicker::before, .folio::before {
  content: "";
  display: inline-block;
  width: 30px;
  height: 1px;
  margin-right: 11px;
  background: currentColor;
  vertical-align: middle;
}
.hero h1 {
  max-width: 780px;
  margin: 0;
  font: 500 clamp(52px, 6.1vw, 104px)/.88 var(--serif);
  letter-spacing: -.06em;
}
.hero h1 em, .closing h2 em {
  color: var(--amber);
  font-weight: 400;
}
.hero-lede {
  max-width: 650px;
  margin: 32px 0 0;
  color: #aaa99f;
  font-size: clamp(16px, 1.25vw, 20px);
}
.hero-actions { display: flex; align-items: center; gap: 24px; margin-top: 35px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  font: 850 11px var(--mono);
  letter-spacing: .1em;
  text-decoration: none;
  text-transform: uppercase;
}
.button-primary { color: var(--night); background: var(--amber); }
.button-primary:hover { background: #ffc13f; }
.text-link {
  color: var(--paper);
  font: 700 11px var(--mono);
  letter-spacing: .07em;
  text-decoration: none;
  text-transform: uppercase;
}
.text-link span { color: var(--amber); }
.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 48px 0 0;
  border: 1px solid var(--line-light);
  background: var(--line-light);
}
.hero-facts div { padding: 13px; background: var(--night); }
.hero-facts dt { color: #73736d; font: 650 8px var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.hero-facts dd { margin: 5px 0 0; color: var(--paper); font: 700 11px var(--mono); }

.hero-reconstruction {
  position: relative;
  z-index: 3;
  align-self: center;
  margin: 7vh clamp(24px, 4vw, 70px) 7vh 0;
  border: 1px solid #3a3935;
  background: #090a09;
  box-shadow: 0 38px 100px rgba(0, 0, 0, .45);
  transform: rotate(.4deg);
}
.recon-meta {
  display: flex;
  justify-content: space-between;
  padding: 11px 14px;
  color: #8a8982;
  border-bottom: 1px solid #32312e;
  font: 650 9px var(--mono);
  letter-spacing: .12em;
}
.recon-field {
  position: relative;
  min-height: clamp(380px, 47vw, 650px);
  overflow: hidden;
  background:
    radial-gradient(ellipse at 60% 50%, rgba(209, 207, 196, .15), transparent 23%),
    linear-gradient(147deg, #343431 0 8%, #191a18 35% 63%, #080909 100%);
  filter: grayscale(.65);
}
.scanlines {
  position: absolute;
  inset: 0;
  z-index: 8;
  pointer-events: none;
  background: repeating-linear-gradient(0deg, rgba(255,255,255,.025) 0 1px, transparent 1px 5px);
}
.table-plane {
  position: absolute;
  left: 7%;
  right: 5%;
  bottom: 11%;
  height: 40%;
  border: 1px solid #5f5f59;
  background: linear-gradient(165deg, rgba(136,135,126,.28), rgba(26,27,25,.88));
  clip-path: polygon(8% 0, 100% 12%, 84% 100%, 0 75%);
}
.target-object {
  position: absolute;
  left: 54%;
  top: 45%;
  width: 13%;
  height: 17%;
  border: 1px solid #b0aea2;
  border-radius: 38% 38% 24% 24%;
  background: linear-gradient(100deg, #4c4d48, #a5a298 47%, #2a2b28);
  box-shadow: 15px 23px 24px rgba(0,0,0,.6);
}
.target-object::after {
  content: "";
  position: absolute;
  right: -32%;
  top: 23%;
  width: 38%;
  height: 45%;
  border: 2px solid #77766f;
  border-left: 0;
  border-radius: 0 50% 50% 0;
}
.robot-arm {
  position: absolute;
  left: -2%;
  top: 20%;
  width: 51%;
  height: 20%;
  border-radius: 0 70% 18% 0;
  background: linear-gradient(#9a998f, #444541 53%, #1f211f);
  transform: rotate(19deg);
  transform-origin: left center;
  box-shadow: 15px 18px 28px rgba(0,0,0,.48);
}
.robot-arm i {
  position: absolute;
  right: -9%;
  top: 18%;
  width: 19%;
  aspect-ratio: 1;
  border: 8px solid #2c2d2a;
  border-radius: 50%;
  background: #8d8c82;
}
.robot-arm b {
  position: absolute;
  right: -25%;
  top: 42%;
  width: 23%;
  height: 52%;
  border-top: 5px solid #929087;
  border-bottom: 5px solid #929087;
  transform: rotate(-8deg);
}
.reference-box {
  position: absolute;
  left: 50.5%;
  top: 39%;
  width: 20%;
  height: 29%;
  border: 2px dashed var(--amber);
  box-shadow: 0 0 28px rgba(255,176,0,.15);
  filter: none;
}
.reference-box::before, .reference-box::after {
  content: "";
  position: absolute;
  width: 12px;
  height: 12px;
  border-color: var(--amber);
}
.reference-box::before { left: -5px; top: -5px; border-left: 3px solid; border-top: 3px solid; }
.reference-box::after { right: -5px; bottom: -5px; border-right: 3px solid; border-bottom: 3px solid; }
.grease-note {
  position: absolute;
  right: 6%;
  top: 25%;
  color: var(--amber);
  font: 800 clamp(17px, 2vw, 31px)/.9 var(--mono);
  letter-spacing: .03em;
  transform: rotate(-7deg);
  filter: none;
}
.grease-note::after {
  content: "";
  display: block;
  width: 76px;
  height: 22px;
  margin: -1px 0 0 -10px;
  border-bottom: 3px solid var(--amber);
  border-radius: 50%;
  transform: rotate(-5deg);
}
.crosshair {
  position: absolute;
  left: 59%;
  top: 53%;
  width: 8px;
  height: 8px;
  margin: -4px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 0 22px rgba(255,74,55,.13), 0 0 0 1px var(--red);
  filter: none;
}
.recon-time {
  position: absolute;
  left: 16px;
  bottom: 13px;
  z-index: 9;
  color: var(--paper);
  font: 600 10px var(--mono);
  text-shadow: 0 1px 3px #000;
}
.filmstrip {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border-top: 1px solid #32312e;
}
.filmstrip span {
  position: relative;
  display: grid;
  place-items: end start;
  height: 54px;
  padding: 7px;
  color: #696861;
  border-right: 1px solid #32312e;
  background: linear-gradient(145deg, #252623, #0c0d0c);
  font: 600 9px var(--mono);
}
.filmstrip span:last-child { border-right: 0; }
.filmstrip .is-fault { color: var(--amber); background: #2c2518; box-shadow: inset 0 -3px var(--amber); }
.evidence-seal {
  position: absolute;
  right: -20px;
  bottom: 28px;
  z-index: 10;
  display: grid;
  place-items: center;
  width: 112px;
  height: 112px;
  color: var(--amber);
  border: 2px solid var(--amber);
  border-radius: 50%;
  background: rgba(14,15,15,.88);
  text-align: center;
  transform: rotate(-9deg);
}
.evidence-seal::before { content: ""; position: absolute; inset: 6px; border: 1px dashed var(--amber); border-radius: 50%; }
.evidence-seal strong { font: 800 27px var(--mono); line-height: .9; }
.evidence-seal span { width: 75px; font: 700 8px/1.3 var(--mono); letter-spacing: .1em; }

.thesis-section, .mechanism-section, .architecture-section, .about-section { padding: clamp(84px, 10vw, 150px) clamp(24px, 7vw, 110px); }
.section-intro { display: grid; grid-template-columns: .6fr 1.2fr 1fr; gap: 50px; align-items: start; }
.section-intro .folio { grid-column: 1; }
.section-intro h2 {
  grid-column: 2;
  margin: 0;
  font: 500 clamp(40px, 4.5vw, 71px)/.98 var(--serif);
  letter-spacing: -.045em;
}
.section-intro > p:last-child { grid-column: 3; margin: 6px 0 0; color: #615d54; }
.problem-ledger {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 86px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.problem-ledger article {
  position: relative;
  min-height: 320px;
  padding: 33px 34px 26px;
  border-right: 1px solid var(--line);
}
.problem-ledger article:last-child { border-right: 0; }
.ledger-no { position: absolute; right: 20px; top: 18px; color: #b5ae9e; font: 500 50px var(--serif); }
.problem-ledger h3 { max-width: 240px; margin: 100px 0 16px; font: 600 30px/1.05 var(--serif); }
.problem-ledger p { max-width: 320px; color: #625e54; }
.problem-ledger small { position: absolute; left: 34px; bottom: 25px; color: var(--amber-deep); font: 700 9px var(--mono); letter-spacing: .14em; }

.evidence-section { padding: clamp(84px, 10vw, 150px) clamp(24px, 7vw, 110px); color: var(--paper); background: var(--night); }
.folio-light { color: var(--amber); }
.evidence-header { display: grid; grid-template-columns: 1fr .65fr; gap: 11vw; align-items: end; }
.evidence-header h2, .paths-section h2 {
  margin: 0;
  font: 500 clamp(46px, 5.4vw, 82px)/.92 var(--serif);
  letter-spacing: -.05em;
}
.evidence-header > p { margin: 0; color: #96958d; }
.causal-plate {
  display: grid;
  grid-template-columns: 1fr 70px 1fr 70px 1fr;
  gap: 0;
  margin-top: 80px;
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}
.causal-node { position: relative; min-height: 510px; padding: 27px 25px 30px; }
.causal-node h3 { margin: 65px 0 35px; font: 650 clamp(34px, 3vw, 49px)/.9 var(--mono); letter-spacing: -.08em; }
.causal-node h3 em { color: var(--red); font-style: normal; }
.node-index {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  color: var(--night);
  background: var(--amber);
  font: 800 11px var(--mono);
}
.node-label { position: absolute; right: 22px; top: 31px; margin: 0; color: #73726b; }
.node-proof { position: absolute; left: 25px; right: 25px; bottom: 22px; color: #8e8d85; font-size: 13px; }
.causal-link { position: relative; display: grid; place-items: center; border-left: 1px solid var(--line-light); border-right: 1px solid var(--line-light); }
.causal-link::before { content: ""; width: 100%; height: 1px; background: var(--amber); }
.causal-link::after { content: ""; position: absolute; right: -1px; border: 5px solid transparent; border-right: 0; border-left-color: var(--amber); }
.causal-link span { position: absolute; padding: 5px 0; color: var(--amber); background: var(--night); font: 650 7px var(--mono); letter-spacing: .12em; text-transform: uppercase; writing-mode: vertical-rl; }
.flip-comparison div, .slice-comparison div { display: grid; grid-template-columns: 94px 1fr 45px; gap: 8px; align-items: center; margin: 12px 0; }
.flip-comparison span, .slice-comparison span { color: #7d7b74; font: 650 8px var(--mono); }
.flip-comparison i, .slice-comparison i { position: relative; display: block; height: 5px; background: #292a27; }
.flip-comparison i::after, .slice-comparison i::after { content: ""; position: absolute; inset: 0 auto 0 0; width: max(2px, var(--value)); background: var(--cyan); }
.slice-comparison i::after { background: var(--amber); }
.slice-comparison .regression i::after { background: var(--red); }
.flip-comparison strong, .slice-comparison strong { text-align: right; font: 700 10px var(--mono); }
.checkpoint-film { display: flex; gap: 7px; margin-top: 64px; }
.checkpoint-film span { display: grid; place-items: center; width: 36px; height: 54px; color: #74736d; border: 1px solid #373834; font: 700 10px var(--mono); }
.checkpoint-film .pass::after { content: "PASS"; position: absolute; margin-top: 70px; color: var(--cyan); font-size: 7px; }
.checkpoint-film .fail::after { content: "FAIL"; position: absolute; margin-top: 70px; color: var(--red); font-size: 7px; }
.checkpoint-film .focus { border: 2px solid var(--amber); color: var(--paper); }
.evidence-caption { max-width: 1050px; margin: 40px 0 0 auto; padding-left: 26px; color: #8d8c84; border-left: 2px solid var(--amber); font-size: 13px; }
.evidence-caption strong { color: var(--paper); }

.section-intro.narrow { grid-template-columns: .6fr 1.8fr; }
.section-intro.narrow h2 { grid-column: 2; max-width: 800px; }
.method-timeline { margin: 80px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.method-timeline li {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr) 170px;
  align-items: baseline;
  gap: 30px;
  padding: 30px 10px;
  border-bottom: 1px solid var(--line);
}
.method-timeline time { color: var(--amber-deep); font: 700 13px var(--mono); }
.method-timeline h3 { display: inline; margin: 0 20px 0 0; font: 600 25px var(--serif); }
.method-timeline p { display: inline; color: #656157; }
.method-timeline > li > span { justify-self: end; color: #8b8578; font: 700 9px var(--mono); letter-spacing: .12em; }
.method-cta {
  display: grid;
  grid-template-columns: 1fr 2fr auto;
  align-items: center;
  gap: 30px;
  margin-top: 36px;
  padding: 26px 30px;
  color: var(--paper);
  background: var(--ink);
  text-decoration: none;
}
.method-cta span { color: var(--amber); font: 700 9px var(--mono); letter-spacing: .13em; }
.method-cta strong { font: 500 25px var(--serif); }
.method-cta i { color: var(--amber); font-size: 24px; font-style: normal; }

.paths-section { display: grid; grid-template-columns: .7fr 1.3fr; gap: 8vw; padding: clamp(84px, 10vw, 150px) clamp(24px, 7vw, 110px); color: var(--paper); background: #22211e; }
.paths { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line-light); }
.paths article { position: relative; min-height: 430px; padding: 32px; }
.paths article + article { border-left: 1px solid var(--line-light); }
.paths article > span { color: #817f77; font: 700 8px var(--mono); letter-spacing: .13em; }
.paths h3 { margin: 80px 0 20px; font: 700 clamp(31px, 3vw, 45px) var(--mono); letter-spacing: -.06em; }
.path-attributed h3 { color: var(--cyan); }
.path-unattributed h3 { color: var(--paper-dim); }
.paths p { color: #a8a69d; }
.paths ul { position: absolute; left: 32px; right: 32px; bottom: 24px; margin: 0; padding: 18px 0 0; border-top: 1px solid var(--line-light); list-style: none; }
.paths li { margin: 5px 0; color: #85837c; font: 600 10px var(--mono); }
.paths li::before { content: "—"; margin-right: 8px; color: var(--amber); }

.architecture-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: 7vw; }
.architecture-copy h2, .about-title h2 { margin: 0; font: 500 clamp(44px, 5vw, 72px)/.95 var(--serif); letter-spacing: -.05em; }
.architecture-copy > p:not(.folio) { margin: 28px 0; color: #5f5a50; }
.dark-link { color: var(--ink); }
.architecture-map { border-top: 1px solid var(--line); }
.architecture-map div { display: grid; grid-template-columns: 120px 1fr; padding: 19px 5px; border-bottom: 1px solid var(--line); }
.architecture-map div span { color: #908879; font: 700 8px var(--mono); letter-spacing: .14em; }
.architecture-map div strong { font: 650 12px var(--mono); }
.architecture-map i { display: block; width: 1px; height: 15px; margin-left: 60px; background: var(--amber-deep); }
.architecture-map .arch-output { color: var(--paper); background: var(--ink); padding-inline: 16px; }
.command-block { grid-column: 1 / -1; display: grid; grid-template-columns: .8fr 1.2fr; gap: 7vw; margin-top: 20px; padding: 28px; color: var(--paper); background: var(--night); }
.command-block span { color: var(--amber); font: 700 9px var(--mono); letter-spacing: .12em; }
.command-block code { color: #aaa89f; font: 12px/1.8 var(--mono); }
.command-block b { color: var(--amber); }

.about-section { display: grid; grid-template-columns: .65fr 1.35fr; gap: 8vw; border-top: 1px solid var(--line); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); }
.about-grid article { min-height: 280px; padding: 28px 25px; border-bottom: 1px solid var(--line); }
.about-grid article:nth-child(1) { border-right: 1px solid var(--line); }
.about-grid h3 { margin: 0 0 24px; font: 600 25px var(--serif); }
.about-grid ul { margin: 0; padding: 0; list-style: none; }
.about-grid li { margin: 10px 0; color: #625e54; font-size: 13px; }
.about-grid li::before { content: "—"; margin-right: 8px; color: var(--amber-deep); }
.about-principle { grid-column: 1 / -1; }
.about-principle span { color: var(--amber-deep); font: 700 9px var(--mono); letter-spacing: .14em; }
.about-principle blockquote { max-width: 750px; margin: 28px 0; font: italic 500 28px/1.2 var(--serif); }
.about-principle a { display: inline-block; margin-right: 22px; font: 700 10px var(--mono); text-decoration: none; text-transform: uppercase; }

.closing { padding: 15vw 24px; color: var(--paper); background: var(--night); text-align: center; }
.closing-code { color: var(--amber); font: 700 9px var(--mono); letter-spacing: .2em; }
.closing h2 { margin: 32px auto 45px; font: 500 clamp(54px, 7.5vw, 112px)/.86 var(--serif); letter-spacing: -.06em; }
.site-footer { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 25px; padding: 30px 28px; color: var(--paper); border-top: 1px solid var(--line-light); background: var(--night); }
.site-footer p { color: #6f6e68; font: 600 9px var(--mono); text-align: center; }
.site-footer nav { justify-self: end; display: flex; gap: 19px; }

@media (max-width: 1100px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-nav { display: none; }
  .hero { grid-template-columns: 50px 1fr; }
  .hero-reconstruction { grid-column: 2; margin: 0 7vw 8vw; }
  .section-intro { grid-template-columns: 1fr 1fr; }
  .section-intro .folio { grid-column: 1 / -1; }
  .section-intro h2 { grid-column: 1; }
  .section-intro > p:last-child { grid-column: 2; }
  .causal-plate { grid-template-columns: 1fr; }
  .causal-node { min-height: 430px; border-bottom: 1px solid var(--line-light); }
  .causal-link { display: none; }
  .paths-section, .about-section { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .site-header { min-height: 58px; padding: 0 14px; }
  .wordmark small { display: none; }
  .header-action { padding: 9px; font-size: 8px; }
  .hero { grid-template-columns: 26px 1fr; }
  .case-spine { padding: 15px 0; }
  .case-spine span { font-size: 6px; }
  .hero-copy { padding: 70px 20px 48px; }
  .hero h1 { font-size: clamp(48px, 15vw, 76px); }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .hero-facts { grid-template-columns: 1fr; }
  .hero-reconstruction { margin: 0 18px 62px 0; }
  .recon-field { min-height: 350px; }
  .evidence-seal { right: -8px; width: 90px; height: 90px; }
  .section-intro, .section-intro.narrow, .evidence-header { grid-template-columns: 1fr; gap: 25px; }
  .section-intro h2, .section-intro.narrow h2, .section-intro > p:last-child { grid-column: 1; }
  .problem-ledger, .paths, .about-grid { grid-template-columns: 1fr; }
  .problem-ledger article { min-height: 250px; border-right: 0; border-bottom: 1px solid var(--line); }
  .problem-ledger article:last-child { border-bottom: 0; }
  .problem-ledger h3 { margin-top: 65px; }
  .causal-node { padding-inline: 16px; }
  .node-proof { left: 16px; right: 16px; }
  .method-timeline li { grid-template-columns: 70px 1fr; gap: 15px; }
  .method-timeline > li > span { display: none; }
  .method-timeline h3, .method-timeline p { display: block; }
  .method-timeline p { margin: 8px 0 0; }
  .method-cta { grid-template-columns: 1fr auto; }
  .method-cta span { display: none; }
  .paths article + article { border-left: 0; border-top: 1px solid var(--line-light); }
  .architecture-section, .command-block { grid-template-columns: 1fr; }
  .about-grid article:nth-child(1) { border-right: 0; }
  .about-principle { grid-column: 1; }
  .site-footer { grid-template-columns: 1fr; text-align: center; }
  .site-footer .wordmark { justify-content: center; }
  .site-footer nav { justify-self: center; flex-wrap: wrap; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}