/*
 * The public blog: the same voice as worksi.ai. No script, no third party, no cookie. Space and hairlines make the
 * structure; the signal is for links and focus only. The theme follows the reader's system.
 */

body {
  font-size: var(--fs-body);
  line-height: 1.6;
}

.container {
  width: 100%;
  max-width: calc(1120px + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

:root {
  --gutter: 16px;
}

@media (min-width: 25rem) {
  :root {
    --gutter: 20px;
  }
}

@media (min-width: 40rem) {
  :root {
    --gutter: 32px;
  }
}

@media (min-width: 64rem) {
  :root {
    --gutter: 40px;
  }
}

/* ------------------------------------------------------------------------------------------------ frame */

.site-header {
  border-bottom: 1px solid var(--mk-line);
}

.site-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--mk-ink);
  font-size: 0.9375rem;
  letter-spacing: -0.012em;
  text-decoration: none;
}

.brand-word {
  font-weight: 600;
  letter-spacing: 0.03em;
}

.brand-sub {
  margin-left: -4px;
  color: var(--mk-ink-2);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.site-link {
  color: var(--mk-ink-2);
  font-size: var(--fs-small);
  text-decoration: none;
}

.site-link:hover {
  color: var(--mk-ink);
}

.site-footer {
  margin-top: 72px;
  border-top: 1px solid var(--mk-line);
  color: var(--mk-ink-3);
  font-size: var(--fs-caption);
}

.site-footer-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 8px 24px;
  align-items: baseline;
  padding-block: 24px;
}

.site-footer a {
  color: var(--mk-ink-2);
}

.site-footer-links {
  display: flex;
  gap: 16px;
}

/* ------------------------------------------------------------------------------------------------ controls */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--mk-ink);
  font: inherit;
  font-size: var(--fs-small);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.005em;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
}

.btn-primary {
  background: var(--mk-btn);
  color: var(--mk-btn-fg);
}

.btn-primary:hover {
  background: var(--mk-btn-hover);
}

.btn-ghost {
  border-color: var(--mk-line-2);
}

.btn-ghost:hover {
  border-color: var(--mk-ink-3);
  background: var(--mk-well);
}

.link {
  color: var(--mk-signal-ink);
  text-decoration: underline;
  text-decoration-color: color-mix(in oklch, var(--mk-signal-ink) 40%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.link:hover {
  text-decoration-color: currentcolor;
}

.tag {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding-inline: 7px;
  border: 1px solid var(--mk-line);
  border-radius: 4px;
  background: var(--mk-bg);
  color: var(--mk-ink-2);
  font-family: var(--font-mono);
  font-size: 0.71875rem;
  font-weight: 500;
  font-feature-settings: normal;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.tag:hover {
  border-color: var(--mk-line-2);
  color: var(--mk-ink);
}

/* ------------------------------------------------------------------------------------------------ index */

.index-head {
  padding-block: clamp(2.25rem, 1.5rem + 3vw, 4rem) 24px;
}

.index-head h1 {
  font-size: clamp(2rem, 1.46rem + 1.8vw, 2.5rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.lead {
  max-width: 60ch;
  margin-top: 14px;
  color: var(--mk-ink-2);
  font-size: clamp(1.0625rem, 1rem + 0.25vw, 1.125rem);
  line-height: 1.55;
  letter-spacing: -0.005em;
}

.empty {
  padding-block: 24px;
  color: var(--mk-ink-3);
}

.article-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--mk-line);
  list-style: none;
}

.article-row {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 8px 24px;
  padding-block: 24px;
  border-bottom: 1px solid var(--mk-line);
}

.article-date {
  color: var(--mk-ink-3);
  font-family: var(--font-mono);
  font-size: var(--fs-kicker);
  font-feature-settings: normal;
  line-height: 2;
}

.article-main h2 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.018em;
}

.article-main h2 a {
  color: var(--mk-ink);
  text-decoration: none;
}

.article-main h2 a:hover {
  color: var(--mk-signal-ink);
}

.article-excerpt {
  max-width: 68ch;
  margin-top: 8px;
  color: var(--mk-ink-2);
  font-size: var(--fs-body-sm);
  line-height: 1.55;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  margin-top: 10px;
  color: var(--mk-ink-3);
  font-family: var(--font-mono);
  font-size: var(--fs-marker);
  font-feature-settings: normal;
}

.pager {
  display: flex;
  gap: 8px;
  padding-block: 20px;
}

.pager:empty {
  display: none;
}

/* ------------------------------------------------------------------------------------------------ article */

.article-head {
  max-width: 820px;
  padding-block: clamp(2.25rem, 1.5rem + 3vw, 4rem) 28px;
}

.article-kicker {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin-bottom: 16px;
  color: var(--mk-ink-3);
  font-family: var(--font-mono);
  font-size: var(--fs-kicker);
  font-weight: 500;
  font-feature-settings: normal;
}

.article-head h1 {
  font-size: clamp(2rem, 1.46rem + 1.8vw, 2.75rem);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -0.032em;
}

.disclosure {
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--mk-line);
  color: var(--mk-ink-3);
  font-size: var(--fs-caption);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
}

.article-layout-toc {
  grid-template-columns: minmax(0, 248px) minmax(0, 1fr);
}

.article-column {
  max-width: 68ch;
  min-width: 0;
}

.toc {
  position: sticky;
  top: 24px;
  align-self: start;
  max-height: calc(100vh - 48px);
  max-height: calc(100svh - 48px);
  overflow-y: auto;
  scrollbar-width: thin;
}

.toc-heading {
  margin-bottom: 8px;
  color: var(--mk-ink-3);
  font-family: var(--font-mono);
  font-size: var(--fs-marker);
  font-weight: 500;
  font-feature-settings: normal;
}

.toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc li {
  padding-block: 3px;
  font-size: var(--fs-caption);
  line-height: 1.4;
}

.toc li[data-level="3"] {
  padding-left: 12px;
}

.toc a {
  color: var(--mk-ink-2);
  text-decoration: none;
}

.toc a:hover {
  color: var(--mk-signal-ink);
}

.prose {
  font-size: var(--fs-body);
  line-height: 1.7;
}

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

.prose :is(p, ul, ol, table, blockquote, pre) {
  margin: 0 0 16px;
}

.prose h2 {
  margin: 36px 0 12px;
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.025em;
  scroll-margin-top: 24px;
}

.prose h3 {
  margin: 28px 0 8px;
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.015em;
  scroll-margin-top: 24px;
}

.prose :is(ul, ol) {
  padding-left: 22px;
}

.prose li + li {
  margin-top: 6px;
}

.prose a {
  color: var(--mk-signal-ink);
  overflow-wrap: anywhere;
  text-decoration-color: color-mix(in oklch, var(--mk-signal-ink) 40%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.prose a:hover {
  text-decoration-color: currentcolor;
}

.prose blockquote {
  padding-left: 14px;
  border-left: 2px solid var(--mk-line-2);
  color: var(--mk-ink-2);
}

.prose code {
  padding: 1px 4px;
  border-radius: 4px;
  background: var(--mk-sunken);
  font-size: 0.875em;
}

.prose pre {
  padding: 12px 14px;
  overflow-x: auto;
  border: 1px solid var(--mk-line);
  border-radius: 10px;
  background: var(--mk-sunken);
  font-size: 0.8125rem;
  line-height: 1.7;
}

.prose pre code {
  padding: 0;
  background: transparent;
  font-size: inherit;
}

.prose table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: var(--fs-small);
}

.prose :is(td, th) {
  padding: 8px 10px;
  border-bottom: 1px solid var(--mk-line);
  text-align: left;
}

.prose th {
  color: var(--mk-ink-3);
  font-family: var(--font-mono);
  font-size: var(--fs-marker);
  font-weight: 500;
  font-feature-settings: normal;
}

.prose hr {
  margin-block: 28px;
  border: 0;
  border-top: 1px solid var(--mk-line);
}

.sources {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--mk-line);
}

.sources h2,
.related h2 {
  color: var(--mk-ink-3);
  font-family: var(--font-mono);
  font-size: var(--fs-marker);
  font-weight: 500;
  font-feature-settings: normal;
}

.sources ol {
  margin: 10px 0 0;
  padding-left: 20px;
  font-size: var(--fs-small);
}

.sources li + li {
  margin-top: 6px;
}

.sources a {
  color: var(--mk-signal-ink);
  overflow-wrap: anywhere;
  text-decoration-color: color-mix(in oklch, var(--mk-signal-ink) 40%, transparent);
  text-underline-offset: 3px;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 24px;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 36px;
  padding: 18px 20px;
  border: 1px solid var(--mk-line);
  border-radius: 10px;
  background: var(--mk-raised);
}

.cta > div {
  flex: 1 1 280px;
}

.cta-title {
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.cta-text {
  margin-top: 4px;
  color: var(--mk-ink-2);
  font-size: var(--fs-small);
  line-height: 1.5;
}

.subscribe {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--mk-line);
}

.subscribe h2 {
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.012em;
}

.subscribe-lead {
  margin-top: 4px;
  color: var(--mk-ink-2);
  font-size: var(--fs-small);
}

.subscribe-lead .link {
  white-space: nowrap;
}

.subscribe-form {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.subscribe-form input[type="email"] {
  flex: 1 1 220px;
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid var(--mk-control);
  border-radius: 6px;
  background: var(--mk-raised);
  color: var(--mk-ink);
  font: inherit;
  font-size: var(--fs-body);
}

.subscribe-form input::placeholder {
  color: var(--mk-ink-3);
}

/* Bots fill this in. People never see it, and a screen reader skips it. */
.hp {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.unsubscribe-form {
  margin-top: 20px;
}

.related {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--mk-line);
}

.related ul {
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.related li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 2px 16px;
  padding-block: 8px;
  border-bottom: 1px dashed var(--mk-line);
}

.related a {
  color: var(--mk-ink);
  font-weight: 500;
  text-decoration: none;
}

.related a:hover {
  color: var(--mk-signal-ink);
}

.related-meta {
  color: var(--mk-ink-3);
  font-family: var(--font-mono);
  font-size: var(--fs-marker);
  font-feature-settings: normal;
}

/* ------------------------------------------------------------------------------------------------ widths */

@media (max-width: 899px) {
  .article-layout-toc {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .toc {
    position: static;
    max-height: none;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--mk-line);
  }
}

@media (max-width: 639px) {
  .article-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .article-date {
    line-height: 1.5;
  }

  .site-footer-row {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .btn {
    transition: background-color var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out);
  }
}

@media print {
  .site-header,
  .site-footer,
  .toc,
  .subscribe,
  .cta,
  .related {
    display: none;
  }
}