/* polyring site. MIST design system: Baby Blue / white / Misty Blue /
   Electric Cobalt / Ink, Josefin Sans headings, Sen text, 2px radius, flat.
   Layout: full-bleed bands (ink hero, white and baby-blue story bands) over a
   1120px column; each story band is a two-column spread, words left, proof right. */

:root {
  color-scheme: light;
  --bg: #ffffff;
  --band: #e3edf5;
  /* Baby Blue */
  --surface: #ffffff;
  --line: #c9d8e4;
  --ink: #081019;
  --ink-2: #33414f;
  --muted: #5a6b7c;
  --link: #0052ff;
  --secondary: #acc4d6;
  /* Misty Blue */
  --secondary-label: #081019;
  --code-bg: #081019;
  --code-ink: #e3edf5;
  --code-muted: #7f97ac;
  --code-str: #9db8ff;
  --mark: #0052ff;
  /* Electric Cobalt */
  --mark-base: #acc4d6;
  --mark-warm: #d9541e;
  /* costs */
  --good: #0a7d4f;
  /* savings */
  --gnark: #5c6f82;
  /* gnark baseline */
  --track: #eef3f8;
  /* hero */
  --hero: #e3edf5;
  --hero-head: #081019;
  --hero-lead: #33414f;
  --hero-muted: #4a5a6b;
  --hero-line: #acc4d6;
  --hero-btn: #acc4d6;
  --hero-btn-label: #081019;
  --hero-good: #0a7d4f;
  --hero-link: #0052ff;
  --ring-base: 8, 16, 25;
  --ring-glow: 0, 82, 255;
  --ring-head: #081019;
  /* footer */
  --foot: #081019;
  --radius: 2px;
  --display: "Josefin Sans", Futura, "Century Gothic", ui-sans-serif, sans-serif;
  --text: "Sen", ui-sans-serif, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --wrap: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #081019;
    --band: #0c1722;
    --surface: #0e1824;
    --line: #1e3044;
    --ink: #e3edf5;
    --ink-2: #c4d4e1;
    --muted: #8fa6ba;
    --link: #9db8ff;
    --code-bg: #050b12;
    --mark: #5c8bff;
    --mark-base: #34495e;
    --mark-warm: #e2622a;
    --good: #4fd69c;
    --gnark: #5b7389;
    --track: #13202e;
    --hero: #050b12;
    --hero-head: #ffffff;
    --hero-lead: #c4d4e1;
    --hero-muted: #8fa6ba;
    --hero-line: #22344a;
    --hero-btn: #22344a;
    --hero-btn-label: #e3edf5;
    --hero-good: #5ee0a6;
    --hero-link: #9db8ff;
    --ring-base: 172, 196, 214;
    --ring-glow: 92, 139, 255;
    --ring-head: #ffffff;
    --foot: #050b12;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #081019;
  --band: #0c1722;
  --surface: #0e1824;
  --line: #1e3044;
  --ink: #e3edf5;
  --ink-2: #c4d4e1;
  --muted: #8fa6ba;
  --link: #9db8ff;
  --code-bg: #050b12;
  --mark: #5c8bff;
  --mark-base: #34495e;
  --mark-warm: #e2622a;
  --good: #4fd69c;
  --gnark: #5b7389;
  --track: #13202e;
  --hero: #050b12;
  --hero-head: #ffffff;
  --hero-lead: #c4d4e1;
  --hero-muted: #8fa6ba;
  --hero-line: #22344a;
  --hero-btn: #22344a;
  --hero-btn-label: #e3edf5;
  --hero-good: #5ee0a6;
  --hero-link: #9db8ff;
  --ring-base: 172, 196, 214;
  --ring-glow: 92, 139, 255;
  --ring-head: #ffffff;
  --foot: #050b12;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
  -webkit-text-size-adjust: 100%;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.6 var(--text);
  overflow-wrap: break-word;
}

a {
  color: var(--link);
  text-underline-offset: 3px;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}

h1,
h2,
h3,
.eyebrow {
  font-family: var(--display);
  color: var(--ink);
  margin: 0;
  text-wrap: balance;
}

h1 {
  font-weight: 700;
  font-size: clamp(34px, 6vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.025em;
}

h2 {
  font-weight: 700;
  font-size: clamp(26px, 4vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

h3 {
  font-weight: 600;
  font-size: 21px;
  line-height: 1.25;
}

/* Josefin's numerals are old-style; figures stay in Sen, even in headings */
.num {
  font-family: var(--text);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.eyebrow {
  display: block;
  font-size: 13px;
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0.8rem 0.16rem;
}

p {
  margin: 0 0 1em;
}

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

sup,
sub {
  line-height: 0;
}

.lead {
  font-size: 20px;
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 58ch;
}

.small {
  font-size: 14px;
  line-height: 1.5;
  color: var(--muted);
}

code,
pre {
  font-family: var(--mono);
  font-size: 0.86em;
}

:not(pre)>code {
  background: var(--band);
  border-radius: var(--radius);
  padding: 0.1em 0.35em;
  overflow-wrap: anywhere;
}

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
}

@media (min-width: 760px) {
  .wrap {
    padding-left: 40px;
    padding-right: 40px;
  }
}

.skip {
  position: absolute;
  left: -9999px;
  top: 8px;
}

.skip:focus {
  left: 16px;
  z-index: 100;
  background: var(--surface);
  padding: 8px 12px;
}

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav .wrap {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  flex: none;
}

.brand svg {
  width: 24px;
  height: 24px;
  color: var(--mark);
}

.brand b {
  font-family: var(--display);
  font-weight: 700;
  font-size: 21px;
  letter-spacing: -0.01em;
  padding-top: 3px;
}

.nav nav {
  margin-left: auto;
  min-width: 0;
}

.nav ul {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav li a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius);
  color: var(--ink-2);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
}

.nav li a:hover {
  color: var(--ink);
  background: var(--band);
}

.nav li a[aria-current="page"] {
  color: var(--ink);
  box-shadow: inset 0 -2px 0 var(--mark);
  border-radius: 0;
}

.theme {
  display: inline-flex;
  padding: 2px;
  gap: 1px;
  flex: none;
  border-radius: var(--radius);
  box-shadow: inset 0 0 0 1px var(--line);
}

.theme button {
  width: 30px;
  height: 28px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  cursor: pointer;
  background: transparent;
  color: var(--muted);
  border-radius: var(--radius);
}

.theme button:hover {
  color: var(--ink);
}

.theme button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--bg);
}

.theme svg {
  width: 16px;
  height: 16px;
}

@media (max-width: 560px) {
  .nav .wrap {
    gap: 8px;
  }

  .nav nav {
    margin-left: auto;
  }

  .nav li a {
    padding: 8px 8px;
    font-size: 14px;
  }

  .nav li:first-child,
  .nav li:last-child {
    display: none;
  }

  .theme button {
    width: 32px;
    height: 32px;
  }
}

/* ---------- buttons ---------- */
.btns {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 20px;
  border: 0;
  border-radius: var(--radius);
  font: 700 15px/1.2 var(--text);
  text-decoration: none;
  cursor: pointer;
  background: var(--secondary);
  color: var(--secondary-label);
  transition: transform .15s ease, filter .15s ease;
}

.btn.primary {
  background: var(--mark);
  color: #ffffff;
}

.btn:hover {
  filter: brightness(1.08);
  text-decoration: none;
  transform: translateY(-1px);
}

.btn.ghost {
  background: transparent;
  color: inherit;
  box-shadow: inset 0 0 0 1px currentColor;
}

.btn .arr {
  transition: transform .15s ease;
}

.btn:hover .arr {
  transform: translateX(3px);
}

/* ---------- hero ---------- */
.hero {
  background: var(--hero);
  color: var(--hero-lead);
  overflow: hidden;
}

.hero .wrap {
  display: grid;
  gap: 32px;
  align-items: center;
  padding-block: 72px 80px;
}

@media (min-width: 940px) {
  .hero .wrap {
    grid-template-columns: 1.15fr 1fr;
    gap: 48px;
    padding-block: 88px 96px;
  }
}

.hero .wrap>* {
  min-width: 0;
}

.hero h1 {
  color: var(--hero-head);
  margin: 18px 0 22px;
}

.hero h1 .num {
  color: var(--hero-good);
}

.hero .eyebrow {
  color: var(--hero-muted);
}

.hero .lead {
  color: var(--hero-lead);
  margin-bottom: 30px;
}

.hero .lead.tag {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.25;
  color: var(--hero-head);
  margin-bottom: 14px;
}

.hero .btn {
  background: var(--hero-btn);
  color: var(--hero-btn-label);
}

.hero .btn.primary {
  background: #0052ff;
  color: #ffffff;
}

.hero a {
  color: var(--hero-link);
}

.install {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
  max-width: 100%;
  font: 500 14px/1.6 var(--mono);
  color: var(--hero-lead);
}

.install code {
  background: transparent;
  padding: 4px 0;
  white-space: nowrap;
  overflow-x: auto;
  line-height: 1.6;
}

.install .p {
  color: var(--hero-muted);
  user-select: none;
}

.install button {
  flex: none;
  font: 600 12px/1 var(--text);
  padding: 7px 10px;
  border: 1px solid var(--hero-line);
  background: transparent;
  color: var(--hero-muted);
  border-radius: var(--radius);
  cursor: pointer;
}

.install button:hover {
  color: var(--hero-head);
  border-color: var(--hero-muted);
}

.hero-note {
  margin-top: 28px;
  font-size: 14px;
  color: var(--hero-muted);
}

.hero-note b {
  color: var(--hero-head);
  font-weight: 600;
}

.ring {
  position: relative;
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1;
  margin: 0 auto;
}

.ring canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.ring .core {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 10px;
  padding: 26%;
  pointer-events: none;
}

.ring .core .id {
  font: 600 clamp(14px, 1.9vw, 18px)/1.4 var(--text);
  color: var(--hero-head);
  white-space: nowrap;
}

.ring .core .cap {
  font-size: 12px;
  line-height: 1.45;
  color: var(--hero-muted);
}

.ring .core .id sub {
  font-size: 0.62em;
  vertical-align: -0.28em;
  line-height: 0;
}

.ring-cap {
  margin: 14px auto 0;
  max-width: 420px;
  text-align: center;
  font-size: 13px;
  color: var(--hero-muted);
}

/* ---------- story bands ---------- */
.band {
  padding-block: 96px;
}

@media (max-width: 480px) {
  .eyebrow {
    letter-spacing: 0.1em;
    font-size: 12px;
  }
}

.band.tint {
  background: var(--band);
}

@media (max-width: 700px) {
  .band {
    padding-block: 64px;
  }
}

.spread {
  display: grid;
  gap: 40px;
  align-items: center;
}

@media (min-width: 900px) {
  .spread {
    grid-template-columns: 1fr 1.1fr;
    gap: 72px;
  }

  .spread.flip> :first-child {
    order: 2;
  }
}

.spread>* {
  min-width: 0;
}

.band h2 {
  margin: 14px 0 20px;
}

@media (min-width: 900px) {
  .band h2 {
    max-width: 18ch;
  }
}

.band .lead {
  margin-bottom: 0;
}

.band .lead+.lead {
  margin-top: 1em;
}

/* big number pairs */
.figs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 28px 32px;
}

.fig .v {
  font: 800 clamp(48px, 6vw, 68px)/1 var(--text);
  letter-spacing: -0.035em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.fig .v.cool {
  color: var(--mark);
}

.fig .v.good {
  color: var(--good);
}

.fig .v.gn {
  color: var(--gnark);
}

.fig .v.warm {
  color: var(--mark-warm);
}

.fig .l {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.45;
  color: var(--ink-2);
  max-width: 26ch;
}

.fig .s {
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
}

/* ---------- constraint bars ---------- */
.meter {
  display: grid;
  gap: 18px;
}

.meter .row {
  display: grid;
  gap: 8px;
}

.meter .top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-size: 15px;
}

.meter .top b {
  font-weight: 700;
}

.meter .top span {
  font-variant-numeric: tabular-nums;
  color: var(--ink-2);
}

.meter .bar {
  display: flex;
  gap: 3px;
  height: 44px;
}

.meter .seg {
  height: 100%;
  flex: 0 1 auto;
  min-width: 0;
  width: calc(var(--n) / var(--max) * 100%);
  background: var(--mark-base);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  padding: 0 12px;
  overflow: hidden;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  color: var(--ink);
  transform-origin: left;
  animation: grow .9s cubic-bezier(.2, .7, .2, 1) both;
}

.meter .seg.hot {
  background: var(--mark);
  color: #ffffff;
}

.meter .seg.gnark {
  background: var(--gnark);
  color: #ffffff;
}

.meter .seg.ghost {
  background: color-mix(in srgb, var(--good) 12%, transparent);
  box-shadow: inset 0 0 0 1px var(--good);
  color: var(--good);
}

@keyframes grow {
  from {
    transform: scaleX(.001);
  }
}

@media (prefers-reduced-motion: reduce) {
  .meter .seg {
    animation: none;
  }
}

.meter .key {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 13px;
  color: var(--muted);
}

.meter .key i {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 7px;
  border-radius: 1px;
  background: var(--mark-base);
}

.meter .key i.hot {
  background: var(--mark);
}

.meter .key i.gnark {
  background: var(--gnark);
}

.meter .key i.good {
  background: color-mix(in srgb, var(--good) 12%, transparent);
  box-shadow: inset 0 0 0 1px var(--good);
}

[data-show="bn254"] [data-curve="bls12381"],
[data-show="bls12381"] [data-curve="bn254"] {
  display: none !important;
}

.toggle {
  display: inline-flex;
  padding: 3px;
  gap: 2px;
  background: var(--band);
  border-radius: var(--radius);
  margin-bottom: 24px;
}

.tint .toggle {
  background: var(--bg);
}

.toggle button {
  font: 600 14px/1 var(--text);
  padding: 9px 14px;
  border: 0;
  cursor: pointer;
  background: transparent;
  color: var(--ink-2);
  border-radius: var(--radius);
}

.toggle button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--bg);
}

/* ---------- equation ---------- */
.eq {
  font: 600 clamp(20px, 2.4vw, 30px)/1.3 var(--text);
  color: var(--ink);
  padding: 28px 0;
  border-block: 1px solid var(--line);
  overflow-x: auto;
  white-space: nowrap;
}

.eq sub,
.ring .id sub {
  font-size: 0.62em;
  vertical-align: -0.28em;
  line-height: 0;
}

.eq-note {
  margin-top: 14px;
  font-size: 14px;
  color: var(--muted);
  max-width: 52ch;
}

/* ---------- use cases ---------- */
.uses {
  display: grid;
  gap: 32px 40px;
  margin-top: 48px;
}

@media (min-width: 820px) {
  .uses {
    grid-template-columns: repeat(3, 1fr);
  }
}

.use {
  border-top: 2px solid var(--ink);
  padding-top: 22px;
}

.use h3 {
  margin-bottom: 10px;
  font-size: 23px;
}

.use p {
  color: var(--ink-2);
  font-size: 16px;
}

/* ---------- trade panel ---------- */
.trade {
  display: grid;
  gap: 16px;
}

.trade>div {
  background: var(--band);
  padding: 28px;
  border-radius: var(--radius);
}

.trade .eyebrow {
  margin-bottom: 14px;
}

.trade dl {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
  margin: 20px 0 0;
  font-size: 15px;
}

.trade dt {
  color: var(--ink);
  font-weight: 600;
}

.trade dt small {
  display: block;
  margin-top: 2px;
  font-weight: 400;
  font-size: 13px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.trade dd {
  margin: 0;
  white-space: nowrap;
  text-align: right;
  font: 800 24px/1 var(--text);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.trade dd.good {
  color: var(--good);
}

.trade dd.bad {
  color: var(--mark-warm);
}

.trade h3 {
  font-size: 22px;
}

/* ---------- code ---------- */
.code {
  margin: 14px 0;
  border-radius: var(--radius);
  background: var(--code-bg);
  color: var(--code-ink);
  overflow: hidden;
}

.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 10px 8px 16px;
  border-bottom: 1px solid #1a2938;
  font: 500 12px/1 var(--mono);
  color: var(--code-muted);
}

.copy {
  font: 600 12px/1 var(--text);
  padding: 7px 10px;
  border: 1px solid #22344a;
  border-radius: var(--radius);
  background: transparent;
  color: var(--code-muted);
  cursor: pointer;
}

.copy:hover {
  color: #ffffff;
  border-color: #8fa6ba;
}

.code pre {
  margin: 0;
  padding: 18px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.65;
  tab-size: 4;
}

.code .c {
  color: var(--code-muted);
}

.code .s {
  color: #7fdcae;
}

.code .k {
  color: #8fb0ff;
  font-weight: 500;
}

.code .n {
  color: #ffb07a;
}

.code .p {
  color: #ffffff;
  font-weight: 500;
  background: rgba(0, 82, 255, .3);
  border-radius: 2px;
  padding: 0 3px;
  margin: 0 -3px;
}

.code .hl {
  display: inline-block;
  width: 100%;
  background: rgba(0, 82, 255, .22);
  box-shadow: -18px 0 0 rgba(0, 82, 255, .22), 18px 0 0 rgba(0, 82, 255, .22);
}

/* ---------- limits ---------- */
.limits {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.limits li {
  display: grid;
  gap: 4px 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 700px) {
  .limits li {
    grid-template-columns: 220px 1fr;
  }
}

.limits b {
  font-weight: 700;
}

.limits span {
  color: var(--ink-2);
}

/* ---------- next / CTA ---------- */
.next {
  display: grid;
  gap: 16px;
}

@media (min-width: 760px) {
  .next {
    grid-template-columns: repeat(3, 1fr);
  }
}

.next a {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 26px;
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--ink);
  text-decoration: none;
  box-shadow: inset 0 0 0 1px var(--line);
  transition: box-shadow .15s ease, transform .15s ease;
}

.next a:hover {
  box-shadow: inset 0 0 0 2px var(--mark);
  transform: translateY(-2px);
}

.next b {
  font: 700 22px/1.2 var(--display);
}

.next span {
  color: var(--ink-2);
  font-size: 15px;
}

.next .go {
  margin-top: auto;
  padding-top: 10px;
  color: var(--link);
  font-weight: 700;
  font-size: 14px;
}

/* ---------- page heads (guide, paper) ---------- */
.page-head {
  background: var(--band);
  padding-block: 72px 56px;
}

.page-head h1 {
  font-size: clamp(28px, 5vw, 58px);
  margin: 14px 0 18px;
}

@media (min-width: 760px) {
  .page-head h1 {
    max-width: 20ch;
  }
}

.page-head .lead {
  margin-bottom: 26px;
}

.byline {
  color: var(--ink-2);
  margin: -4px 0 24px;
}

/* ---------- guide ---------- */
.guide {
  display: grid;
  gap: 48px;
  padding-block: 64px 96px;
}

@media (min-width: 980px) {
  .guide {
    grid-template-columns: 220px 1fr;
    gap: 64px;
  }
}

.guide>* {
  min-width: 0;
}

.toc {
  position: sticky;
  top: 96px;
  align-self: start;
  font-size: 14px;
}

.toc ol {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  counter-reset: t;
  display: grid;
  gap: 2px;
}

.toc li {
  counter-increment: t;
}

.toc ol a {
  display: flex;
  gap: 10px;
  padding: 6px 8px;
  color: var(--ink-2);
  text-decoration: none;
  border-radius: var(--radius);
}

.toc ol a::before {
  content: counter(t);
  font-weight: 700;
  color: var(--muted);
  min-width: 1.1em;
  font-variant-numeric: tabular-nums;
}

.toc ol a:hover,
.toc ol a.on {
  background: var(--band);
  color: var(--ink);
}

.toc ol a.on::before {
  color: var(--mark);
}

.toc-cta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 20px;
  padding: 14px 16px;
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--line);
  transition: box-shadow .15s ease;
}

.toc-cta:hover {
  box-shadow: inset 0 0 0 2px var(--mark);
}

.toc-cta b {
  font: 700 15px/1.3 var(--text);
}

.toc-cta span {
  color: var(--link);
  font-weight: 700;
  font-size: 13px;
}

@media (max-width: 979px) {
  .toc {
    position: static;
  }

  .toc ol {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 0 0 56px 64px;
  counter-increment: step;
}

.step::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: var(--bg);
  font: 700 17px/1 var(--text);
}

.step::after {
  content: "";
  position: absolute;
  left: 19.5px;
  top: 52px;
  bottom: 12px;
  width: 1px;
  background: var(--line);
}

.step:last-child::after {
  display: none;
}

.step h2 {
  font-size: clamp(22px, 3vw, 26px);
  margin: 6px 0 10px;
  letter-spacing: -0.01em;
}

.step>p {
  max-width: 68ch;
  color: var(--ink-2);
}

@media (max-width: 560px) {
  .step {
    padding-left: 0;
    padding-top: 54px;
  }

  .step::after {
    display: none;
  }
}

.note {
  padding: 14px 18px;
  background: var(--band);
  border-radius: var(--radius);
  margin: 14px 0;
  font-size: 15px;
  box-shadow: inset 3px 0 0 var(--mark);
}

.note.warn {
  box-shadow: inset 3px 0 0 var(--mark-warm);
}

.note b {
  font-weight: 700;
}

/* ---------- paper ---------- */
.paper {
  padding-block: 64px 96px;
  display: grid;
  gap: 80px;
}

.paper>* {
  min-width: 0;
}

.paper section>h2 {
  margin: 12px 0 18px;
}

.ct {
  font-size: 18px;
}

@media (max-width: 600px) {
  .ct {
    font-size: 15px;
  }
}

.prose {
  max-width: 68ch;
}

.abstract {
  margin: 16px 0 0;
  font-size: 19px;
  line-height: 1.7;
  color: var(--ink-2);
}

.prose p {
  color: var(--ink-2);
}

.two {
  display: grid;
  gap: 40px;
}

@media (min-width: 900px) {
  .two {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }
}

.two>* {
  min-width: 0;
}

.hbars {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.hbars .r {
  display: grid;
  grid-template-columns: minmax(140px, 36%) 1fr 64px;
  gap: 14px;
  align-items: center;
  font-size: 14px;
}

.hbars .t {
  height: 22px;
  background: var(--track);
  border-radius: var(--radius);
  position: relative;
}

.hbars .f {
  position: absolute;
  inset: 0 auto 0 0;
  width: calc(var(--v) / var(--max) * 100%);
  background: var(--mark-base);
  border-radius: var(--radius);
}

.hbars .f.hot {
  background: var(--mark);
}

.hbars .f.gn {
  background: var(--gnark);
}

.hbars .n.good {
  color: var(--good);
}

.hbars .f.thin {
  height: 9px;
}

.hbars .f.thin+.f.thin {
  top: auto;
  bottom: 0;
}

.hbars .n {
  text-align: right;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.hbars .n small {
  display: block;
  font-weight: 400;
  color: var(--muted);
}

@media (max-width: 600px) {
  .hbars .r {
    grid-template-columns: 1fr 64px;
  }

  .hbars .r> :first-child {
    grid-column: 1 / -1;
  }
}

.table-wrap {
  overflow-x: auto;
  margin-top: 16px;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 14px;
}

caption {
  text-align: left;
  padding-bottom: 8px;
  font-size: 13px;
  color: var(--muted);
}

th,
td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  font: 600 12px/1.3 var(--display);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

td.n,
th.n {
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

tr.sub td {
  font-weight: 700;
  padding-top: 18px;
  color: var(--ink);
}

td.good {
  color: var(--good);
  font-weight: 700;
}

/* ---------- footer ---------- */
footer {
  background: var(--foot);
  color: #8fa6ba;
  font-size: 14px;
}

footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 24px 40px;
  align-items: center;
  justify-content: space-between;
  padding-block: 48px 56px;
}

.wordmark {
  color: #e3edf5;
  display: inline-flex;
}

.wordmark svg {
  height: 28px;
  width: auto;
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}

footer a {
  color: #c4d4e1;
}

footer p {
  flex-basis: 100%;
  margin: 0;
}