:root {
  color-scheme: light;
  --sj-bg: #f8f7f2;
  --sj-bg-soft: #eeebe4;
  --sj-surface: #fffefa;
  --sj-text: #171f27;
  --sj-text-2: #303942;
  --sj-muted: #6d6b66;
  --sj-accent: #275687;
  --sj-accent-2: #426f9b;
  --sj-border: #d9d3ca;
  --sj-button-bg: #171f27;
  --sj-button-fg: #f8f7f2;
  --sj-code-bg: #fffefa;
  --sj-code-header: #eeebe4;
  --sj-code-text: #171f27;
  --sj-code-muted: #6d6b66;
  --sj-code-keyword: #275687;
  --sj-code-string: #5f7d62;
  --sj-code-number: #8a5f22;
  --sj-code-function: #7b4f9b;
  --sj-code-button-bg: #eeebe4;
  --sj-code-button-fg: #275687;
  --sj-code-button-hover-bg: #275687;
  --sj-code-button-hover-fg: #fffefa;
  --sj-shadow: 0 18px 50px rgb(23 31 39 / 0.08);
  --gh-font-heading: "Segoe UI", Aptos, Calibri, -apple-system, BlinkMacSystemFont, sans-serif;
  --gh-font-body: "Segoe UI", Aptos, Calibri, -apple-system, BlinkMacSystemFont, sans-serif;
  --sj-font: var(--gh-font-body);
  --sj-font-heading: var(--gh-font-heading);
  --sj-mono: "Cascadia Code", "Cascadia Mono", "SFMono-Regular", "Fira Code", Consolas, "Liberation Mono", monospace;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --sj-bg: #19212a;
  --sj-bg-soft: #111821;
  --sj-surface: #242c36;
  --sj-text: #f2eadf;
  --sj-text-2: #ded3c5;
  --sj-muted: #a2998d;
  --sj-accent: #78a7d6;
  --sj-accent-2: #88b4df;
  --sj-border: #444b53;
  --sj-button-bg: #f2eadf;
  --sj-button-fg: #19212a;
  --sj-code-bg: #111821;
  --sj-code-header: #19212a;
  --sj-code-text: #f2eadf;
  --sj-code-muted: #a7a39c;
  --sj-code-keyword: #88b4df;
  --sj-code-string: #9fbb8e;
  --sj-code-number: #d9b982;
  --sj-code-function: #d7b8ff;
  --sj-code-button-bg: #19212a;
  --sj-code-button-fg: #88b4df;
  --sj-code-button-hover-bg: #88b4df;
  --sj-code-button-hover-fg: #111821;
  --sj-shadow: 0 18px 50px rgb(0 0 0 / 0.22);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--sj-bg);
  color: var(--sj-text);
  font-family: var(--sj-font);
  font-size: 16px;
  line-height: 1.5;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at top left, color-mix(in srgb, var(--sj-accent) 14%, transparent), transparent 34rem),
    linear-gradient(180deg, var(--sj-bg), var(--sj-bg-soft));
  color: var(--sj-text);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

button,
input,
textarea {
  font: inherit;
}

::selection {
  background: color-mix(in srgb, var(--sj-accent) 26%, transparent);
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 20;
  transform: translateY(-160%);
  border: 1px solid var(--sj-border);
  border-radius: 999px;
  background: var(--sj-surface);
  color: var(--sj-text);
  padding: 0.65rem 1rem;
  transition: transform 160ms ease;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.skip-link:focus {
  transform: translateY(0);
}

.wrap {
  width: min(100% - 2rem, 72rem);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--sj-bg) 88%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--sj-border) 72%, transparent);
  backdrop-filter: blur(18px);
}

.nav,
.links,
.site-footer .wrap {
  display: flex;
  align-items: center;
}

.nav {
  min-height: 4.25rem;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand,
.links a,
.links button,
.theme-toggle {
  color: var(--sj-text-2);
  font-weight: 700;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.logo {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border: 1px solid var(--sj-border);
  border-radius: 50%;
  background: var(--sj-surface);
  color: var(--sj-accent);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.links {
  gap: 1rem;
}

.links a,
.links button,
.theme-toggle {
  border-radius: 999px;
  font-size: 0.9rem;
}

.links a:not(.subscribe):hover,
.links a:not(.subscribe):focus-visible,
.links button:hover,
.links button:focus-visible {
  color: var(--sj-accent);
}

.links a.subscribe,
.newsletter-button,
.button.primary {
  border: 1px solid var(--sj-button-bg);
  background: var(--sj-button-bg);
  color: var(--sj-button-fg);
}

.links a.subscribe {
  padding: 0.65rem 1rem;
}

.links a.subscribe:hover,
.links a.subscribe:focus-visible,
.newsletter-button:hover,
.newsletter-button:focus-visible,
.button.primary:hover,
.button.primary:focus-visible {
  background: var(--sj-accent);
  border-color: var(--sj-accent);
  color: #fffefa;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.35rem;
  height: 2.35rem;
  border: 0;
  background: transparent;
  color: var(--sj-text-2);
  cursor: pointer;
  padding: 0;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.search-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.35rem;
  height: 2.35rem;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 0;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.theme-toggle:hover,
.theme-toggle:focus-visible,
.search-toggle:hover,
.search-toggle:focus-visible {
  background: color-mix(in srgb, var(--sj-accent) 10%, transparent);
  color: var(--sj-accent);
  transform: translateY(-1px);
}

.theme-toggle-icon {
  display: block;
  width: 1.45rem;
  height: 1.45rem;
}

.theme-toggle-sun,
.theme-toggle[data-theme="dark"] .theme-toggle-moon {
  display: none;
}

.theme-toggle[data-theme="dark"] .theme-toggle-sun {
  display: block;
}

.hero-cover,
.page-head {
  padding: clamp(4rem, 10vw, 8rem) 0 clamp(3rem, 7vw, 5rem);
}

.hero-copy {
  max-width: 58rem;
}

.eyebrow,
.meta,
.count {
  color: var(--sj-muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-block: 0;
}

h1,
h2,
h3 {
  font-family: var(--sj-font-heading);
}

h1 {
  max-width: 15ch;
  margin-top: 0.7rem;
  color: var(--sj-text);
  font-size: clamp(2.35rem, 5vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.052em;
}

h2 {
  color: var(--sj-text);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

h3 {
  color: var(--sj-text);
  font-size: clamp(1.2rem, 2vw, 1.65rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.lead {
  max-width: 55rem;
  margin-top: 1.5rem;
  color: var(--sj-text-2);
  font-size: clamp(1.2rem, 2.1vw, 1.75rem);
  line-height: 1.42;
  letter-spacing: -0.025em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.button,
.newsletter-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  border: 1px solid var(--sj-border);
  border-radius: 999px;
  background: var(--sj-surface);
  color: var(--sj-text);
  font-weight: 800;
  padding: 0.7rem 1rem;
}

.button:hover,
.button:focus-visible {
  border-color: var(--sj-accent);
  color: var(--sj-accent);
}

.note {
  max-width: 42rem;
  margin-top: 2rem;
  color: var(--sj-muted);
}

.hero-rule {
  width: min(100%, 46rem);
  height: 1px;
  margin-top: 3rem;
  background: linear-gradient(90deg, var(--sj-accent), transparent);
}

.section {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.25rem;
}

.view-all {
  color: var(--sj-accent);
  font-weight: 800;
}

.featured {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(18rem, 0.7fr);
  gap: 1rem;
}

.side-list,
.post-feed {
  display: grid;
  gap: 1rem;
}

.post-feed {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.post-card,
.topic {
  display: grid;
  gap: 1rem;
  min-height: 15rem;
  align-content: start;
  border: 1px solid var(--sj-border);
  border-radius: 1.4rem;
  background: color-mix(in srgb, var(--sj-surface) 86%, transparent);
  box-shadow: var(--sj-shadow);
  padding: 1.35rem;
  transition: border-color 160ms ease, transform 160ms ease;
}

.post-card:hover,
.post-card:focus-visible,
.topic:hover,
.topic:focus-visible {
  border-color: var(--sj-accent);
  transform: translateY(-2px);
}

.post-card.large {
  min-height: 25rem;
  padding: clamp(1.4rem, 4vw, 2.25rem);
}

.post-card.large h3 {
  max-width: 18ch;
  font-size: clamp(1.9rem, 3.8vw, 3.2rem);
  line-height: 1.02;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.tag {
  color: var(--sj-accent);
}

.excerpt {
  color: var(--sj-muted);
}

.topics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.topic {
  min-height: 13rem;
}

.newsletter {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 28rem);
  gap: 2rem;
  align-items: center;
  border: 1px solid var(--sj-border);
  border-radius: 1.7rem;
  background: var(--sj-surface);
  box-shadow: var(--sj-shadow);
  padding: clamp(1.5rem, 4vw, 2.5rem);
}

.newsletter p {
  max-width: 44rem;
  margin-top: 0.8rem;
  color: var(--sj-muted);
}

.newsletter-form {
  display: grid;
  gap: 0.75rem;
}

.newsletter-input {
  width: 100%;
  border: 1px solid var(--sj-border);
  border-radius: 999px;
  background: var(--sj-bg);
  color: var(--sj-text);
  min-height: 2.8rem;
  padding: 0.75rem 1rem;
}

.newsletter-input::placeholder {
  color: var(--sj-muted);
}

.newsletter-input:focus-visible {
  border-color: var(--sj-accent);
  outline: 3px solid color-mix(in srgb, var(--sj-accent) 18%, transparent);
}

.newsletter-form .newsletter-button {
  width: 100%;
  border-color: var(--sj-button-bg);
  background: var(--sj-button-bg);
  color: var(--sj-button-fg);
}

.newsletter-form .loading,
.newsletter-form .success,
.newsletter-message {
  display: none;
}

.newsletter-form.loading .default,
.newsletter-form.success .default,
.newsletter-form.success .loading {
  display: none;
}

.newsletter-form.loading .loading,
.newsletter-form.success .success,
.newsletter-form.success .success-message,
.newsletter-form.error .error-message {
  display: block;
}

.newsletter-message {
  margin: 0.1rem 0 0;
  color: var(--sj-muted);
  font-size: 0.9rem;
}

.newsletter-form.error .error-message {
  color: #b45309;
}

.post-subscribe {
  grid-template-columns: minmax(0, 1fr);
  margin-top: clamp(2.5rem, 6vw, 4rem);
}

.post-subscribe h2 {
  margin: 0.35rem 0 0;
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.15;
}

.post-subscribe .newsletter-form {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr) auto;
  align-items: center;
}

.post-subscribe .newsletter-form .newsletter-button {
  min-height: 2.8rem;
  padding-inline: 1.2rem;
}

.site-footer {
  border-top: 1px solid var(--sj-border);
  color: var(--sj-muted);
  padding: 2rem 0;
}

.site-footer .wrap {
  flex-wrap: wrap;
  gap: 1rem;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--sj-accent);
}

.post-shell {
  display: grid;
  grid-template-columns: minmax(0, 54rem) minmax(12rem, 16rem);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.post-layout {
  max-width: 54rem;
  padding: clamp(3rem, 7vw, 5.5rem) 1rem;
}

.post-header {
  margin-bottom: clamp(2rem, 5vw, 4rem);
}

.post-header h1 {
  max-width: 24ch;
  font-size: clamp(1.9rem, 3.2vw, 2.75rem);
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.article-preview {
  color: var(--sj-text-2);
  font-size: 1.08rem;
  line-height: 1.75;
}

.article-preview > * + * {
  margin-top: 1.35em;
}

.article-preview h2,
.article-preview h3 {
  scroll-margin-top: 6rem;
  margin-top: 2.2em;
  color: var(--sj-text);
}

.post-toc {
  position: sticky;
  top: 6rem;
  display: grid;
  gap: 0.7rem;
  max-height: calc(100vh - 7rem);
  overflow: auto;
  border-left: 1px solid var(--sj-border);
  color: var(--sj-muted);
  margin-top: clamp(5rem, 9vw, 8rem);
  padding-left: 1rem;
}

.toc-title {
  color: var(--sj-text);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.post-toc nav {
  display: grid;
  gap: 0.35rem;
}

.toc-link {
  border-radius: 0.55rem;
  color: var(--sj-muted);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.25;
  padding: 0.35rem 0.45rem;
}

.toc-link.child {
  font-size: 0.82rem;
  font-weight: 600;
  padding-left: 1rem;
}

.toc-link:hover,
.toc-link:focus-visible {
  background: color-mix(in srgb, var(--sj-accent) 10%, transparent);
  color: var(--sj-accent);
}

.article-preview a {
  color: var(--sj-accent);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.article-preview blockquote {
  margin-inline: 0;
  border-left: 4px solid var(--sj-accent);
  color: var(--sj-text);
  padding-left: 1.2rem;
}

.article-preview :not(pre) > code {
  border: 1px solid var(--sj-border);
  border-radius: 0.45rem;
  background: var(--sj-surface);
  color: var(--sj-accent);
  font-family: var(--sj-mono);
  font-size: 0.88em;
  padding: 0.12rem 0.32rem;
}

.article-preview pre,
.diagram-card,
.kg-code-card pre {
  position: relative;
  border: 1px solid color-mix(in srgb, var(--sj-border) 52%, transparent);
  border-radius: 1.1rem;
  background: var(--sj-code-bg) !important;
  color: var(--sj-code-text) !important;
  box-shadow: var(--sj-shadow);
  font-family: var(--sj-mono);
  font-size: 0.72rem;
  line-height: 1.52;
  padding: 1rem;
}

.article-preview pre,
.kg-code-card pre {
  width: 100%;
  max-width: 100%;
  margin-left: 0;
  overflow-x: hidden;
  transform: none;
  white-space: pre-wrap !important;
}

.article-preview pre.code-window,
.kg-code-card pre.code-window {
  background:
    linear-gradient(var(--sj-code-header), var(--sj-code-header)) top / 100% 2.1rem no-repeat,
    var(--sj-code-bg) !important;
  max-height: min(38rem, 75vh);
  overflow-y: auto;
  padding: 2.35rem 0 1rem;
}

.article-preview pre[class*="language-"],
.article-preview code[class*="language-"],
.kg-code-card pre[class*="language-"],
.kg-code-card code[class*="language-"] {
  font-family: var(--sj-mono) !important;
  font-size: 0.72rem !important;
  line-height: 1.52 !important;
  background: transparent !important;
  color: var(--sj-code-text) !important;
  text-shadow: none !important;
}

.article-preview pre.code-window::before,
.kg-code-card pre.code-window::before {
  content: "";
  position: absolute;
  top: 0.85rem;
  left: 1rem;
  width: 0.62rem;
  height: 0.62rem;
  border-radius: 999px;
  background: #ff5f57;
  box-shadow: 1rem 0 #ffbd2e, 2rem 0 #28c840;
  opacity: 0.82;
}

.copy-code {
  appearance: none;
  position: absolute;
  top: 0.55rem;
  right: 0.7rem;
  border: 1px solid color-mix(in srgb, var(--sj-code-button-fg) 45%, transparent);
  border-radius: 0.45rem;
  background: var(--sj-code-button-bg);
  color: var(--sj-code-button-fg);
  cursor: pointer;
  font-family: var(--sj-mono);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  padding: 0.38rem 0.52rem;
  text-transform: uppercase;
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease;
}

.copy-code:hover,
.copy-code:focus-visible,
.copy-code.copied {
  border-color: var(--sj-code-button-hover-bg);
  background: var(--sj-code-button-hover-bg);
  color: var(--sj-code-button-hover-fg);
}

.article-preview pre.code-window code,
.kg-code-card pre.code-window code {
  display: block;
  counter-reset: code-line;
  color: inherit;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  padding: 0 1rem 0 3.75rem;
  text-shadow: none;
  white-space: pre-wrap !important;
}

.code-gutter {
  position: absolute;
  top: 2.35rem;
  left: 0;
  width: 2.9rem;
  border-right: 1px solid color-mix(in srgb, var(--sj-code-muted) 22%, transparent);
  color: color-mix(in srgb, var(--sj-code-muted) 68%, transparent);
  font-family: var(--sj-mono);
  font-size: 0.72rem;
  line-height: 1.52;
  pointer-events: none;
  padding-right: 0.7rem;
  text-align: right;
  user-select: none;
}

.code-gutter span {
  display: block;
  min-height: 1.52em;
}

.kg-width-wide {
  width: min(72rem, calc(100vw - 2rem));
  max-width: none;
  margin-left: 50%;
  transform: translateX(-50%);
}

.kg-width-full {
  width: 100vw;
  max-width: none;
  margin-left: 50%;
  transform: translateX(-50%);
}

.kg-width-full img {
  width: 100%;
}

.article-preview pre code {
  font-family: inherit;
  overflow-wrap: anywhere;
  white-space: inherit !important;
  word-break: normal;
}

.token.comment {
  color: var(--sj-code-muted) !important;
}

.token.keyword,
.token.tag,
.token.selector {
  color: var(--sj-code-keyword) !important;
}

.token.string,
.token.attr-value {
  color: var(--sj-code-string) !important;
}

.token.number,
.token.boolean {
  color: var(--sj-code-number) !important;
}

.token.function,
.token.attr-name {
  color: var(--sj-code-function) !important;
}

.token.operator,
.token.punctuation,
.token.property,
.token.variable {
  background: transparent !important;
  color: var(--sj-code-text) !important;
}

.diagram-card {
  background: var(--sj-surface);
  color: var(--sj-text);
}

.diagram-card svg {
  width: 100%;
  height: auto;
}

.diagram-error {
  border-color: #b45309;
  color: #b45309;
  white-space: pre-wrap;
}

.elucim-diagram {
  min-height: 24rem;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}

.pagination a,
.pagination span {
  border: 1px solid var(--sj-border);
  border-radius: 999px;
  background: var(--sj-surface);
  padding: 0.65rem 0.95rem;
}

@media (max-width: 850px) {
  .nav,
  .links,
  .featured,
  .post-shell,
  .post-feed,
  .topics,
  .newsletter,
  .post-subscribe .newsletter-form {
    grid-template-columns: 1fr;
  }

  .nav,
  .links {
    align-items: flex-start;
  }

  .nav {
    padding: 1rem 0;
  }

  .links {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .topics,
  .post-feed {
    display: grid;
  }

  .post-toc {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}