/* TAP Certified public site. One stylesheet, no framework.
   Look: black and blue, from TAP's mascot and badge. A deep night ground, one neon blue, and one
   physical object (the credential card) carrying the badge and the fine-line guilloche print.
   Fonts are served from this site (SIL Open Font License, see /fonts/LICENSE-OFL.txt). */

@font-face {
  font-family: "Public Sans";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/fonts/public-sans.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/fonts/ibm-plex-mono-400.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/fonts/ibm-plex-mono-500.woff2") format("woff2");
}

:root {
  --paper: #05070d;
  --sheet: #0b1220;
  --ink: #eef3ff;
  --muted: #93a3c4;
  --rule: #1b2740;
  --seal: #79b0ff; /* the accent: links, buttons, valid stamps */
  --seal-ink: #05070d;
  --glow: #3b7cf5;
  --alert: #ff9b9b;
  --wash: #0e1a33;
  --edge: #4a6199; /* borders of things you can click or type in (3:1 on the sheet) */

  color-scheme: dark;
  accent-color: var(--seal);

  --sans: "Public Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --measure: 68ch;
  --gutter: clamp(1rem, 4vw, 2.5rem);
}

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

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

body {
  margin: 0;
  background:
    radial-gradient(60rem 36rem at 85% -10%, color-mix(in srgb, var(--glow) 16%, transparent), transparent 70%),
    var(--paper);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  font-kerning: normal;
}
td,
th,
.num,
.terms dd,
.regno {
  font-variant-numeric: tabular-nums;
}
::placeholder {
  color: #8a9bbd;
  opacity: 1;
}

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

a {
  color: var(--seal);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}
a:hover {
  text-decoration-thickness: 2px;
}

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

.skip {
  position: absolute;
  inset-inline-start: var(--gutter);
  inset-block-start: -4rem;
  background: var(--seal);
  color: var(--seal-ink);
  padding: 0.5rem 0.9rem;
  border-radius: 4px;
  z-index: 10;
}
.skip:focus {
  inset-block-start: 0.5rem;
}

.visually-hidden {
  position: absolute;
  clip-path: inset(50%);
  overflow: hidden;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  white-space: nowrap;
}

.wrap {
  max-inline-size: 74rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ------------------------------------------------------------------ header */

.masthead {
  border-block-end: 1px solid var(--rule);
}
.masthead .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 2rem;
  padding-block: 0.9rem;
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 750;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.wordmark img {
  inline-size: 2.25rem;
  block-size: 2.25rem;
}
.masthead nav {
  margin-inline-start: auto;
}
.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav a {
  color: var(--muted);
  text-decoration: none;
  padding-block: 0.4rem;
  display: inline-block;
}
.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--ink);
}
.nav a[aria-current="page"] {
  box-shadow: inset 0 -2px 0 var(--seal);
}
.nav .primary a {
  padding: 0.35rem 0.85rem;
  border-radius: 6px;
  background: var(--seal);
  color: var(--seal-ink);
  font-weight: 650;
}
.nav .primary a:hover {
  color: var(--seal-ink);
  filter: brightness(1.08);
}
.nav .primary a[aria-current="page"] {
  box-shadow:
    0 0 0 2px var(--paper),
    0 0 0 4px var(--seal);
}
@media (max-width: 40rem) {
  .masthead nav {
    inline-size: 100%;
  }
  /* One row that scrolls sideways; the fade shows there is more. */
  .nav {
    flex-wrap: nowrap;
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: none;
    padding-block: 0.3rem;
    padding-inline: 0.25rem 2rem;
    margin-inline: -0.25rem;
    mask-image: linear-gradient(90deg, #000 calc(100% - 2.5rem), transparent);
  }
  .nav::-webkit-scrollbar {
    display: none;
  }
}
.network {
  inline-size: 100%;
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted);
}

/* ------------------------------------------------------------------ type */

h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin-block: 0 0.6em;
  text-wrap: balance;
}
h1 {
  font-size: clamp(2.3rem, 5.2vw, 3.9rem);
  font-weight: 780;
  letter-spacing: -0.03em;
  line-height: 1.04;
}
h2 {
  font-size: clamp(1.5rem, 2.6vw, 1.95rem);
  font-weight: 720;
}
h3 {
  font-size: 1.2rem;
  font-weight: 680;
}
p {
  margin-block: 0 1em;
  max-inline-size: var(--measure);
  text-wrap: pretty;
}
.lede {
  font-size: 1.22rem;
  line-height: 1.55;
  color: var(--muted);
  max-inline-size: 44ch;
  text-wrap: balance;
}
.small {
  font-size: 0.875rem;
  color: var(--muted);
}
code,
.mono {
  font-family: var(--mono);
  font-size: 0.92em;
}
.mono,
p code {
  overflow-wrap: anywhere;
}
.addr {
  font-family: var(--mono);
  font-size: 0.95em;
  overflow-wrap: anywhere;
}

main {
  padding-block: clamp(2rem, 6vw, 4.5rem) clamp(3rem, 8vw, 6rem);
}
main > * + section,
main > * + .split {
  margin-block-start: clamp(3rem, 7vw, 5.5rem);
}
main > .page-head + * {
  margin-block-start: 0;
}
main > * + h2 {
  margin-block-start: clamp(2rem, 4vw, 3rem);
}

/* ------------------------------------------------------------------ home hero */

.hero {
  display: grid;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
  grid-template-columns: minmax(0, 1fr);
}
.hero > div:first-child {
  padding-block-start: clamp(0rem, 2vw, 1.5rem);
}
@media (min-width: 60rem) {
  .hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

.lookup {
  margin-block-start: 2rem;
  max-inline-size: 36rem;
}
.lookup label {
  display: block;
  font-weight: 650;
  margin-block-end: 0.15rem;
}
.lookup .hint {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
  margin-block-end: 0.5rem;
}
.lookup .row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.lookup input {
  flex: 1 1 20rem;
  min-inline-size: 0;
  min-block-size: 3rem;
  padding: 0.7rem 0.85rem;
  font: 500 1rem/1.2 var(--mono);
  color: var(--ink);
  background: var(--sheet);
  border: 1.5px solid var(--edge);
  border-radius: 6px;
}
.lookup input:focus-visible {
  border-color: var(--seal);
  outline-offset: 1px;
}
.lookup input:user-invalid,
.lookup input[aria-invalid="true"] {
  border-color: var(--alert);
}
.lookup .error {
  display: none;
  color: var(--alert);
  font-size: 0.9rem;
  margin-block: 0.4rem 0;
}
.lookup input:user-invalid ~ .error,
.lookup .error.shown {
  display: block;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-block-size: 3rem;
  padding: 0.7rem 1.3rem;
  border: 0;
  border-radius: 6px;
  background: var(--seal);
  color: var(--seal-ink);
  font: 650 1rem/1.2 var(--sans);
  text-decoration: none;
  cursor: pointer;
}
.button:hover {
  filter: brightness(1.08);
  box-shadow: 0 0 22px -4px color-mix(in srgb, var(--glow) 80%, transparent);
}
.example {
  margin-block-start: 1rem;
  font-size: 0.95rem;
  color: var(--muted);
}

/* ------------------------------------------------------------------ the credential card */

.credential {
  container: card / inline-size;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  max-inline-size: 34rem;
  background: linear-gradient(135deg, #0f1d3a 0%, var(--sheet) 55%);
  border: 1px solid #22345a;
  border-radius: 18px;
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--glow) 18%, transparent),
    0 24px 60px -28px color-mix(in srgb, var(--glow) 70%, transparent);
}
.credential .guilloche {
  position: absolute;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  color: var(--glow);
  opacity: 0.22;
  z-index: -1;
  pointer-events: none;
}
.credential header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.9rem 1.25rem;
  border-block-end: 1px solid #22345a;
  background: linear-gradient(90deg, color-mix(in srgb, var(--glow) 22%, transparent), transparent);
}
.credential header strong {
  font-size: 1.02rem;
  letter-spacing: 0.01em;
}
.credential header span {
  font-size: 0.85rem;
  color: var(--seal);
}
.credential .holder {
  padding: 1.1rem 1.25rem 0.4rem;
}
.credential .holder .label {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
}
.credential .holder .addr {
  font-size: 1rem;
  font-weight: 500;
}
.credential dl {
  margin: 0;
  padding: 0.4rem 1.25rem 1.2rem;
  display: grid;
  gap: 0;
}
.credential .entry {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.15rem 1rem;
  padding-block: 0.7rem;
  border-block-start: 1px dashed var(--rule);
}
.credential .entry:first-child {
  border-block-start: 0;
}
.credential dt {
  font-weight: 650;
}
.credential dt .tag {
  display: block;
  font: 400 0.82rem/1.4 var(--mono);
  color: var(--muted);
  overflow-wrap: anywhere;
}
.credential dt .by {
  display: block;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--muted);
}
.credential dd {
  margin: 0;
  text-align: end;
}
.credential footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 1.25rem 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.credential footer p {
  margin: 0;
}
.credential .seal {
  flex: none;
  inline-size: 6rem;
  block-size: 6rem;
  margin-block-start: -1rem;
  filter: drop-shadow(0 0 14px color-mix(in srgb, var(--glow) 55%, transparent));
}
@container card (width < 27rem) {
  .credential .entry {
    grid-template-columns: minmax(0, 1fr);
  }
  .credential dd {
    text-align: start;
  }
}
/* No valid stamp: no glow, no seal, no blue header. Revoked: an alert edge. */
.credential:not([data-state="valid"]) {
  background: var(--sheet);
  box-shadow: none;
  border-color: var(--rule);
}
.credential:not([data-state="valid"]) .guilloche {
  opacity: 0.08;
}
.credential:not([data-state="valid"]) header {
  background: none;
}
.credential:not([data-state="valid"]) header span {
  color: var(--muted);
}
.credential[data-state="revoked"] {
  border-color: color-mix(in srgb, var(--alert) 55%, var(--rule));
}
.credential[data-state="revoked"] header {
  background: linear-gradient(90deg, color-mix(in srgb, var(--alert) 14%, transparent), transparent);
}

.hero-badge {
  inline-size: min(100%, 26rem);
  block-size: auto;
  margin-inline: auto;
  border-radius: 22%;
  filter: drop-shadow(0 0 48px color-mix(in srgb, var(--glow) 45%, transparent));
}

/* Status marks: a shape and a word, never color alone. */
.status {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  white-space: nowrap;
}
.status::before {
  content: "";
  inline-size: 0.8rem;
  block-size: 0.8rem;
  border-radius: 50%;
  border: 2px solid currentColor;
  flex: none;
}
.status.valid {
  color: var(--seal);
}
.status.valid::before {
  background: currentColor;
}
.status.revoked {
  color: var(--alert);
}
.status.revoked::before {
  border-radius: 2px;
  transform: rotate(45deg);
  background: currentColor;
}
.status.expired,
.status.none {
  color: var(--muted);
  font-weight: 500;
}
/* A creator's certification: an open ring in ink, never TAP's filled blue mark. */
.status.creator {
  color: var(--ink);
}
.status.none::before {
  border: 0;
  border-radius: 1px;
  block-size: 2px;
  background: currentColor;
}
.sub {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 400;
}

/* ------------------------------------------------------------------ plain sections */

.facts {
  display: grid;
  gap: 1.5rem 3rem;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  margin-block-start: 1.5rem;
}
.facts h3 {
  margin-block-end: 0.3rem;
}
.facts p {
  color: var(--muted);
  margin: 0;
}

.split {
  display: grid;
  gap: 2rem 3rem;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
}

.uses {
  padding-block-start: clamp(1.5rem, 3vw, 2.25rem);
  border-block-start: 1px solid var(--rule);
}
.uses h3 {
  font-size: 1.3rem;
  margin-block-end: 0.35rem;
}
.uses .price {
  color: var(--seal);
  font-weight: 650;
  margin-block-end: 0.6rem;
}
.uses p:not(.price) {
  color: var(--muted);
}
.page-head {
  margin-block-end: 2.5rem;
}
.page-head p {
  color: var(--muted);
}
.page-head h1 + p:not(.addr) {
  color: var(--ink);
  font-size: 1.15rem;
}
h1.long {
  font-size: clamp(1.9rem, 3.4vw, 2.7rem);
}
.verdict h1 {
  margin-block-end: 0.3em;
}
.verdict h1 .status {
  gap: 0.28em;
  font-weight: inherit;
  white-space: normal;
}
.verdict h1 .status::before {
  inline-size: 0.42em;
  block-size: 0.42em;
  border-width: 0.07em;
}
.verdict h1 .status.none::before {
  block-size: 0.08em;
}
.verdict .addr .label {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--muted);
  margin-inline-end: 0.3rem;
}
.page-head p.summary {
  color: var(--ink);
  font-size: 1.2rem;
}
.card-split {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 24rem), 1fr));
}
@media (max-width: 30rem) {
  .page-head .addr {
    font-size: 0.82rem;
  }
  .verdict .addr .label {
    display: block;
  }
}
.notice {
  padding: 0.8rem 1rem;
  border-inline-start: 3px solid var(--alert);
  background: color-mix(in srgb, var(--alert) 8%, transparent);
  color: var(--ink) !important;
}
.hashes dt {
  font-size: 0.85rem;
  color: var(--muted);
  margin-block-start: 0.8rem;
}
.hashes dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.badges {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  vertical-align: middle;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.05rem 0.55rem;
  border: 1px solid var(--seal);
  border-radius: 999px;
  color: var(--seal);
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.6;
  white-space: nowrap;
}
.badge.recognized {
  background: var(--seal);
  color: var(--seal-ink);
}
.badge svg {
  inline-size: 0.85rem;
  block-size: 0.85rem;
}

/* Key facts about one certification. */
.terms {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 0;
  margin: 1.5rem 0 2rem;
  border-block: 1px solid var(--rule);
}
.terms div {
  padding: 0.9rem 1rem 0.9rem 0;
}
.terms dt {
  color: var(--muted);
  font-size: 0.875rem;
}
.terms dd {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 650;
}

/* ------------------------------------------------------------------ tables */

.table-scroll {
  overflow-x: auto;
  container-type: inline-size;
  margin-block: 1rem 1.5rem;
}
table {
  inline-size: 100%;
  border-collapse: collapse;
  font-size: 0.97rem;
}
th,
td {
  text-align: start;
  vertical-align: top;
  padding: 0.7rem 0.9rem 0.7rem 0;
  border-block-end: 1px solid var(--rule);
}
thead th {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--muted);
  border-block-end: 1.5px solid var(--ink);
}
tbody th {
  font-weight: 650;
}
tbody th a.mono {
  font-weight: 500;
}
td.num,
th.num {
  text-align: end;
  white-space: nowrap;
}

/* The catalog table stacks into one block per certification on narrow screens. */
@container (width < 40rem) {
  .catalog table,
  .catalog tbody,
  .catalog tr,
  .catalog th,
  .catalog td {
    display: block;
  }
  .catalog thead {
    display: none;
  }
  .catalog tr {
    padding-block: 0.8rem;
    border-block-end: 1px solid var(--rule);
  }
  .catalog th,
  .catalog td {
    border: 0;
    padding: 0.1rem 0;
    text-align: start;
  }
  .catalog td[data-label]::before {
    content: attr(data-label) ": ";
    color: var(--muted);
  }
  /* Two columns of short facts; names and long cells take the full width. */
  .catalog tr {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 0.2rem 1rem;
  }
  .catalog th,
  .catalog td[data-label="By"],
  .catalog td[data-label="Certification"],
  .catalog td[data-label="Price"]:has(.sub),
  .catalog td[data-label="Last exam here"] {
    grid-column: 1 / -1;
  }
  .catalog td:empty {
    display: none;
  }
  .registry td[data-label="No."] {
    order: -1;
    grid-column: 1 / -1;
  }
  .registry td[data-label="No."]::before,
  .registry td[data-label="Proof"]::before {
    content: none;
  }
  /* Score and the proof link share a line; each date gets its own. */
  .registry td[data-label="Score"] {
    order: 1;
  }
  .registry td[data-label="Proof"] {
    order: 2;
  }
  .registry td.date {
    order: 3;
    grid-column: 1 / -1;
  }
}
.registry td.date,
.registry th a.mono {
  white-space: nowrap;
}
.registry th[scope="row"] {
  min-inline-size: 16rem;
}

.search {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: end;
  margin-block: 1.5rem;
}
.search label {
  display: block;
  font-weight: 600;
  inline-size: 100%;
}
.search input {
  flex: 1 1 16rem;
  min-block-size: 3rem;
  padding: 0.6rem 0.8rem;
  font: 1rem/1.2 var(--sans);
  color: var(--ink);
  background: var(--sheet);
  border: 1.5px solid var(--edge);
  border-radius: 6px;
}
@media (max-width: 30rem) {
  .search .button {
    flex: 1 1 100%;
  }
}

.empty {
  padding: 1.5rem 0;
  color: var(--muted);
}

.cta-line {
  margin-block-start: 1.2rem;
  color: var(--muted);
}
.cta-line a {
  font-weight: 650;
}

/* ------------------------------------------------------------------ get certified */

.steps {
  list-style: none;
  counter-reset: step;
  margin: 0 0 3rem;
  padding: 0;
  display: grid;
  gap: 2rem;
  max-inline-size: 52rem;
}
.steps > li {
  counter-increment: step;
  position: relative;
  padding-inline-start: 3.6rem;
  min-inline-size: 0;
}
.steps > li::before {
  content: counter(step);
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0.1rem;
  display: grid;
  place-items: center;
  inline-size: 2.4rem;
  block-size: 2.4rem;
  border-radius: 50%;
  border: 1.5px solid var(--glow);
  color: var(--seal);
  font: 500 1rem var(--mono);
}
.steps h2,
.steps h3 {
  font-size: 1.3rem;
  margin: 0 0 0.4rem;
}
.doc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0;
  max-inline-size: 46rem;
  border-block-start: 1px solid var(--rule);
}
.doc-list li {
  padding-block: 0.9rem;
  border-block-end: 1px solid var(--rule);
}
.doc-list a {
  font-size: 1.15rem;
  font-weight: 650;
  color: var(--ink);
  text-decoration-color: color-mix(in srgb, var(--seal) 45%, transparent);
}
.doc-list a:hover {
  color: var(--seal);
}
.crumb {
  margin: 0 0 1rem;
  font-size: 0.9rem;
}
.steps p {
  margin-block: 0.4rem;
}
.faq {
  display: grid;
  gap: 1.2rem;
  max-inline-size: var(--measure);
  margin: 1rem 0 0;
}
.faq dt {
  font-weight: 650;
}
.faq dd {
  margin: 0.2rem 0 0;
  color: var(--muted);
}

/* A page's main column with a short "at a glance" box: beside it on wide screens (and staying in
   view), above it on phones. */
.with-aside {
  display: grid;
  gap: 2rem 3.5rem;
  grid-template-columns: minmax(0, 1fr);
}
.with-aside > div > * + section {
  margin-block-start: clamp(3rem, 7vw, 5.5rem);
}
@media (min-width: 64rem) {
  .with-aside {
    grid-template-columns: minmax(0, 1fr) 19rem;
  }
  .with-aside > div {
    grid-column: 1;
    grid-row: 1;
  }
  .with-aside > aside {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    inset-block-start: 1.5rem;
    align-self: start;
  }
}
.glance {
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--rule);
  border-radius: 12px;
  background: var(--sheet);
}
.glance h2 {
  font-size: 1.05rem;
  margin-block-end: 0.7rem;
}
.glance dl {
  display: grid;
  gap: 0.6rem;
  margin: 0 0 1.1rem;
}
.glance dt {
  font-size: 0.85rem;
  color: var(--muted);
}
.glance dd {
  margin: 0;
  font-weight: 600;
}
.glance .button {
  inline-size: 100%;
}
.glance p:last-child {
  margin-block-end: 0;
}

/* ------------------------------------------------------------------ the Registry */

.filters {
  display: grid;
  gap: 0.6rem;
  margin-block: 1.5rem 0.5rem;
}
.filters p {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
}
.filters span {
  min-inline-size: 4.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.filters a {
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--edge);
  border-radius: 999px;
  color: var(--ink);
  font-size: 0.9rem;
  text-decoration: none;
  background: var(--sheet);
}
.filters a:hover {
  border-color: var(--seal);
}
.filters a[aria-current="true"] {
  background: var(--seal);
  border-color: var(--seal);
  color: var(--seal-ink);
  font-weight: 650;
}
.regno {
  font-family: var(--mono);
  font-weight: 500;
  color: var(--seal);
  white-space: nowrap;
  word-spacing: -0.35em; /* "No. 7", not "No.  7": the mono space is a full cell wide */
}
.registry .muted,
.muted {
  color: var(--muted);
}
.founding {
  display: block;
  margin-block-start: 0.15rem;
  font-size: 0.8rem;
  font-weight: 650;
  color: var(--seal);
  white-space: nowrap;
}
.page-head .regline {
  color: var(--muted);
}
.callout {
  margin-block: 1rem 1.5rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--glow);
  border-radius: 10px;
  background: linear-gradient(135deg, var(--wash), var(--sheet));
  max-inline-size: var(--measure);
}
.callout strong {
  color: var(--ink);
}
.rules {
  padding-inline-start: 1.2rem;
  max-inline-size: var(--measure);
}
.rules li {
  margin-block: 0.5rem;
}
.pager {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  color: var(--muted);
}

/* ------------------------------------------------------------------ code */

pre {
  position: relative;
  margin: 1rem 0 1.5rem;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  background: #0b1220;
  color: #dbe7ff;
  border: 1px solid var(--rule);
  border-radius: 10px;
  font: 0.88rem/1.55 var(--mono);
  max-inline-size: 100%;
  padding-inline-end: 5.2rem; /* room for the Copy button */
}
/* One-line commands and snippets wrap instead of scrolling under the Copy button. */
.steps pre,
pre.snippet {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
pre code {
  font-size: inherit;
}
.code {
  position: relative;
  margin: 1rem 0 1.5rem;
}
.code pre {
  margin: 0;
}
.code.scrolls::after {
  content: "";
  position: absolute;
  inset-block: 1px;
  inset-inline-end: 1px;
  inline-size: 2.5rem;
  border-radius: 0 9px 9px 0;
  background: linear-gradient(90deg, transparent, #0b1220);
  pointer-events: none;
}
.copy {
  position: absolute;
  z-index: 1;
  inset-block-start: 0.5rem;
  inset-inline-end: 0.5rem;
  padding: 0.25rem 0.6rem;
  font: 600 0.8rem/1.4 var(--sans);
  color: #dbe7ff;
  background: #13213d;
  border: 1px solid var(--edge);
  border-radius: 6px;
  cursor: pointer;
}
.copy:hover {
  background: #1a2c52;
}

/* ------------------------------------------------------------------ docs */

.docs {
  display: grid;
  gap: 2rem 3.5rem;
  grid-template-columns: minmax(0, 1fr);
}
@media (min-width: 64rem) {
  .docs {
    grid-template-columns: 15rem minmax(0, 1fr);
  }
  .toc {
    position: sticky;
    inset-block-start: 1.5rem;
    align-self: start;
    max-block-size: calc(100dvh - 3rem);
    overflow-y: auto;
  }
}
.toc summary {
  font-size: 0.95rem;
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
}
.toc[open] summary {
  margin-block-end: 0.6rem;
}
@media (max-width: 63.99rem) {
  .toc {
    padding: 0.7rem 1rem;
    border: 1px solid var(--rule);
    border-radius: 8px;
  }
}
.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.93rem;
}
.toc li {
  margin-block: 0.35rem;
}
.toc .depth-3 {
  padding-inline-start: 0.9rem;
}
.toc a {
  color: var(--muted);
  text-decoration: none;
}
.toc a:hover {
  color: var(--ink);
}
.prose {
  min-inline-size: 0;
}
.prose h2 {
  margin-block-start: 2.2em;
  padding-block-start: 1rem;
  border-block-start: 1px solid var(--rule);
}
.prose h3 {
  margin-block-start: 1.8em;
}
.prose li {
  max-inline-size: var(--measure);
  margin-block: 0.3em;
}
.prose table {
  font-size: 0.95rem;
}
.prose hr {
  border: 0;
  border-block-start: 1px solid var(--rule);
  margin-block: 2.5rem;
}

/* ------------------------------------------------------------------ footer */

.colophon {
  border-block-start: 1px solid var(--rule);
  padding-block: 2rem 3rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.colophon .wrap {
  display: grid;
  gap: 1rem 3rem;
  grid-template-columns: minmax(0, 1fr);
}
@media (min-width: 48rem) {
  .colophon .wrap {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  }
}
.colophon p {
  max-inline-size: 62ch;
}
.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
  align-content: start;
}

@media (prefers-reduced-motion: no-preference) {
  .credential {
    animation: lay-down 520ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
  }
  @keyframes lay-down {
    from {
      transform: translateY(10px) rotate(-1.2deg);
      opacity: 0;
    }
    to {
      transform: none;
      opacity: 1;
    }
  }
}

@media print {
  .masthead,
  .colophon,
  .copy {
    display: none;
  }
}