/* GPT Bugs — long-form articles: table of contents, prose, code, tables, next-page link. */

/* Article frame ---------------------------------------------------------- */
.article {
  display: grid;
  gap: 2.5rem;
  padding: clamp(1.5rem, 1rem + 2vw, 3rem) var(--gutter) 0;
  border-top: var(--rule) solid var(--ink);
}

@media (min-width: 64rem) {
  .article {
    grid-template-columns: 15rem minmax(0, 1fr);
    gap: clamp(2.5rem, 1rem + 4vw, 5rem);
  }

  .article--single {
    grid-template-columns: minmax(0, 1fr);
  }

  .toc {
    position: sticky;
    top: 1.5rem;
    align-self: start;
    max-height: calc(100vh - 3rem);
    overflow-y: auto;
  }
}

/* Table of contents ------------------------------------------------------ */
.toc__heading {
  margin: 0 0 0.5rem;
  font-size: var(--step--1);
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.toc__list {
  counter-reset: toc;
  border-top: var(--rule-thin) solid var(--ink);
}

.toc__list li {
  counter-increment: toc;
  border-bottom: var(--rule-thin) solid var(--ink);
}

.toc__list a {
  display: flex;
  gap: 0.75rem;
  min-height: var(--target);
  padding: 0.6rem 0;
  font-size: var(--step--1);
  font-weight: 700;
  line-height: 1.3;
  text-decoration: none;
}

.toc__list a::before {
  content: counter(toc, decimal-leading-zero);
  flex: none;
  min-width: 1.6em;
  color: var(--ink-muted);
  font-variant-numeric: tabular-nums;
}

.toc__list a:hover {
  text-decoration: underline;
}

/* Prose ------------------------------------------------------------------ */
.prose {
  max-width: 68ch;
  min-width: 0;
  line-height: 1.65;
}

.prose > :first-child {
  margin-top: 0;
}

.prose p,
.prose ul,
.prose ol,
.prose table,
.prose pre,
.prose blockquote {
  margin: 0 0 1.25rem;
}

.prose h2 {
  margin: 3.5rem 0 1rem;
  padding-top: 1rem;
  border-top: var(--rule) solid var(--ink);
  font-size: var(--step-2);
  font-weight: 900;
  font-stretch: 112%;
  line-height: 1.05;
  letter-spacing: -0.01em;
  scroll-margin-top: 1rem;
}

.prose > h2:first-child {
  padding-top: 0;
  border-top: 0;
}

.prose h3 {
  margin: 2.25rem 0 0.5rem;
  font-size: var(--step-1);
  font-weight: 800;
  font-stretch: 106%;
  line-height: 1.2;
  scroll-margin-top: 1rem;
}

.prose strong {
  font-weight: 800;
}

.prose a:hover {
  text-decoration-thickness: var(--rule);
}

.prose ul,
.prose ol {
  padding-left: 1.4em;
}

.prose ul {
  list-style: square;
}

.prose ol {
  list-style: decimal;
}

.prose li + li {
  margin-top: 0.4rem;
}

.prose li::marker {
  font-weight: 800;
}

.prose li > :is(pre, p) {
  margin-top: 0.75rem;
}

/* Pull statement: fully boxed, never a one-sided accent bar. */
.prose blockquote {
  margin-block: 2rem;
  padding: 1.25rem 1.5rem;
  border: var(--rule) solid var(--ink);
  font-size: var(--step-1);
  line-height: 1.35;
}

.prose blockquote p {
  margin: 0;
}

/* Code ------------------------------------------------------------------- */
.prose code {
  font-size: 0.875em;
}

.prose :not(pre) > code {
  padding: 0.1em 0.3em;
  background: color-mix(in oklch, var(--ink) 7%, var(--paper));
  overflow-wrap: anywhere;
}

.prose pre {
  position: relative;
  overflow-x: auto;
  padding: 2.25rem 1.25rem 1.25rem;
  border: var(--rule-thin) solid var(--ink);
  background: color-mix(in oklch, var(--ink) 5%, var(--paper));
  font-size: var(--step--1);
  line-height: 1.6;
  tab-size: 2;
}

.prose pre::before {
  content: attr(data-lang);
  position: absolute;
  top: 0;
  left: 0;
  padding: 0.25rem 0.6rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.prose pre:not([data-lang]) {
  padding-top: 1.25rem;
}

.prose pre:not([data-lang])::before {
  content: none;
}

.prose pre:focus-visible {
  outline-offset: 2px;
}

.prose pre code {
  font-size: inherit;
}

/* Tables ----------------------------------------------------------------- */
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--step--1);
  line-height: 1.45;
}

.prose th,
.prose td {
  padding: 0.65rem 0.75rem;
  border: var(--rule-thin) solid var(--ink);
  text-align: left;
  vertical-align: top;
}

.prose thead th {
  border-bottom-width: var(--rule);
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.prose tbody td:first-child {
  font-weight: 700;
}

/* Checklist -------------------------------------------------------------- */
.prose .checklist {
  padding: 0;
  list-style: none;
  border-top: var(--rule) solid var(--ink);
}

.prose .checklist li {
  position: relative;
  margin: 0;
  padding: 0.75rem 0 0.75rem 2.25rem;
  border-bottom: var(--rule-thin) solid var(--ink);
}

.prose .checklist li::before {
  content: "";
  position: absolute;
  top: 1.05rem;
  left: 0.25rem;
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--ink);
}

/* Postal address (DMCA agent) ------------------------------------------- */
.prose .postal {
  margin: 0 0 1.25rem;
  padding: 1.25rem 1.5rem;
  border: var(--rule) solid var(--ink);
  font-style: normal;
  font-weight: 600;
  line-height: 1.6;
}

/* Contact channels ------------------------------------------------------- */
.prose .channels {
  margin: -1.25rem 0 3rem;
  padding: 0;
  list-style: none;
}

.prose .channels .channel {
  display: grid;
  gap: 0.35rem;
  margin: 0;
  padding: 1.25rem 0;
  border-bottom: var(--rule-thin) solid var(--ink);
}

.prose .channel__title {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: var(--step-1);
  font-stretch: 106%;
}

.prose .channel__desc {
  margin: 0;
}

.channel__action {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: var(--target);
  margin-top: 0.4rem;
  padding: 0.5rem 1rem;
  border: var(--rule) solid var(--ink);
  font-weight: 800;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.channel__action::after {
  content: "\2192";
  font-weight: 400;
  transition: transform 200ms var(--ease-out);
}

.channel__action:hover {
  background: var(--ink);
  color: var(--paper);
}

.channel__action:hover::after {
  transform: translateX(0.2em);
}

/* Next page -------------------------------------------------------------- */
.next-page {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 0.25rem 1rem;
  margin-top: clamp(3rem, 2rem + 4vw, 6rem);
  padding: 1.25rem var(--gutter) 1.5rem;
  border-block: var(--rule) solid var(--ink);
  text-decoration: none;
}

.next-page::after {
  content: "\2192";
  grid-row: 1 / 3;
  grid-column: 2;
  font-size: var(--step-3);
  font-weight: 400;
  line-height: 1;
  transition: transform 200ms var(--ease-out);
}

.next-page:hover::after {
  transform: translateX(0.2em);
}

.next-page:hover .next-page__title {
  text-decoration: underline;
  text-decoration-thickness: var(--rule);
}

.next-page:focus-visible {
  outline-offset: -6px;
}

.next-page__label {
  font-size: var(--step--1);
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.next-page__title {
  font-size: var(--step-2);
  font-weight: 900;
  font-stretch: 112%;
  line-height: 1.05;
}