/* The blog: same colours as the landing page, set for long reading. No script. */

:root {
  color-scheme: dark;
  --bg: #07080b;
  --surface: #101216;
  --surface-2: #16181d;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.15);
  --text: #f5f5f7;
  --body: rgba(236, 239, 247, 0.84);
  --muted: rgba(236, 239, 247, 0.62);
  --blue: #0a84ff;
  --blue-soft: #6cb6ff;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter Variable", Inter, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, monospace;
  --gutter: max(18px, env(safe-area-inset-left, 0px));
  --measure: 690px;
}

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

html {
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font: 18px/1.7 var(--font);
  -webkit-font-smoothing: antialiased;
  padding-left: var(--gutter);
  padding-right: max(18px, env(safe-area-inset-right, 0px));
}

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

a:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 4px;
}

img {
  max-width: 100%;
  height: auto;
}

/* Top bar */

.top {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 650;
  font-size: 17px;
  text-decoration: none;
}

.top nav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 15px;
}

.top nav a {
  color: var(--muted);
  text-decoration: none;
}

.top nav a:hover {
  color: var(--text);
}

.top nav a.get {
  color: #fff;
  background: var(--blue);
  padding: 7px 14px;
  border-radius: 999px;
  font-weight: 600;
}

/* Post */

.post,
.index {
  max-width: var(--measure);
  margin: 0 auto;
  padding-block: 24px 64px;
}

.index {
  max-width: 1080px;
}

.crumbs {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 20px;
}

.crumbs a {
  color: var(--muted);
}

.post-head h1 {
  color: var(--text);
  font-size: clamp(32px, 5.4vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-weight: 750;
  margin: 0 0 16px;
  text-wrap: balance;
}

.dek {
  font-size: 20px;
  line-height: 1.55;
  color: var(--muted);
  margin: 0 0 18px;
  text-wrap: pretty;
}

.meta {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

.cover {
  display: block;
  width: 100%;
  margin: 32px 0 8px;
  border-radius: 16px;
  border: 1px solid var(--line);
}

.prose h2 {
  color: var(--text);
  font-size: 27px;
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin: 52px 0 14px;
  text-wrap: balance;
}

.prose h3 {
  color: var(--text);
  font-size: 20px;
  margin: 36px 0 10px;
}

.prose p,
.prose ul,
.prose ol {
  margin: 0 0 20px;
}

.prose li {
  margin-bottom: 8px;
}

.prose li::marker {
  color: var(--muted);
}

.prose strong {
  color: var(--text);
  font-weight: 650;
}

.prose kbd,
.prose code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 1px 6px;
  color: var(--text);
  white-space: nowrap;
}

/* Terminal commands are long single lines: the block scrolls on its own
   instead of widening the whole page. */
.prose pre {
  margin: 0 0 22px;
  padding: 14px 16px;
  max-width: 100%;
  overflow-x: auto;
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  line-height: 1.55;
}

.prose pre code {
  display: block;
  padding: 0;
  background: none;
  border: 0;
  border-radius: 0;
  font-size: 0.84em;
  white-space: pre;
}

.prose blockquote {
  margin: 28px 0;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--blue);
  color: var(--text);
}

.prose blockquote p:last-child {
  margin-bottom: 0;
}

.prose figure {
  margin: 32px 0;
}

.prose figure img {
  display: block;
  margin: 0 auto;
  border-radius: 14px;
  border: 1px solid var(--line);
}

.prose figcaption {
  font-size: 14px;
  color: var(--muted);
  text-align: center;
  margin-top: 10px;
}

.prose .table {
  overflow-x: auto;
}

.prose table {
  border-collapse: collapse;
  width: 100%;
  font-size: 16px;
  margin: 0 0 24px;
}

.prose th,
.prose td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line-strong);
  vertical-align: top;
}

.prose th {
  color: var(--text);
  font-weight: 600;
}

/* Call to action */

.cta {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  margin-top: 56px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 20px;
}

.cta strong {
  display: block;
  color: var(--text);
  font-size: 19px;
  margin-bottom: 6px;
}

.cta p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.6;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  font-size: 15px;
}

.cta-inline {
  align-items: center;
  gap: 14px;
  margin: 32px 0;
  padding: 14px 16px;
  border-radius: 16px;
}

.cta-inline p {
  flex: 1;
  margin: 0;
}

.cta-inline strong {
  margin: 0;
  font-size: 16px;
}

.cta-inline .button {
  flex-shrink: 0;
  font-size: 15px;
}

.button {
  display: inline-block;
  background: var(--blue);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  padding: 10px 18px;
  border-radius: 999px;
}

.button:hover {
  background: #2a95ff;
}

/* Related posts */

.related {
  margin-top: 56px;
}

.related h2 {
  color: var(--text);
  font-size: 20px;
  margin: 0 0 12px;
}

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

.related li {
  padding-block: 16px;
  border-top: 1px solid var(--line);
}

.related li a {
  font-weight: 600;
  font-size: 18px;
}

.related li p {
  margin: 4px 0 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--muted);
}

/* Index */

.index .post-head {
  max-width: var(--measure);
}

.cards {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

.cards a {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
  color: inherit;
  text-decoration: none;
}

.cards img {
  border-radius: 14px;
  border: 1px solid var(--line);
  margin-bottom: 8px;
}

.cards h2 {
  color: var(--text);
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0;
  text-wrap: balance;
}

.cards a:hover h2 {
  color: var(--blue-soft);
}

.cards p {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--muted);
}

.index .cta {
  max-width: var(--measure);
}

/* Footer */

.foot {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  padding-block: 28px calc(40px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--muted);
}

.foot p {
  margin: 0 auto 0 0;
}

.foot a:not(.brand) {
  color: var(--muted);
}

@media (max-width: 720px) {
  body {
    font-size: 17px;
  }

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

  .cta {
    flex-direction: column;
    gap: 14px;
  }

  .cta-inline {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .top nav {
    gap: 14px;
  }
}

/* Small phones: the breadcrumb already links to the blog, so the bar drops it. */
@media (max-width: 420px) {
  .top nav a:first-child {
    display: none;
  }
}

/* Language list in the top bar: works without script. */

.langs {
  position: relative;
}

.langs summary {
  list-style: none;
  cursor: pointer;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  padding: 6px 4px;
}

.langs summary::-webkit-details-marker {
  display: none;
}

.langs summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
  border-radius: 6px;
}

.langs ul {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  z-index: 10;
  min-width: 150px;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
}

.top nav .langs a {
  display: block;
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--muted);
}

.top nav .langs a:hover,
.top nav .langs a[aria-current="page"] {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

/* Japanese headings break between phrases, not in the middle of a word. */
:lang(ja) h1,
:lang(ja) h2,
:lang(ja) h3 {
  word-break: auto-phrase;
}