/* Design tokens */

:root {
  /* Typography */
  --font-body: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;

  /* Light colors */
  --background: #f4f8f3;
  --text: #303230;
  --muted: #5f655e;
  --link: #2c2f2c;
  --content-link: #235a97;
  --rule: #d8dfd5;
  --code-background: #e9e9ef;
  --code-text: #3760bf;
  --selection-background: #cbdfff;
  --selection-text: #1f2a35;

  /* Layout */
  --max-width: 980px;
  --content-width: 760px;
  --post-width: 820px;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* Dark colors */
    --background: #151815;
    --text: #e6ebe2;
    --muted: #aab2a6;
    --link: #f0f4ec;
    --content-link: #8ab4f8;
    --rule: #343b33;
    --code-background: #1a1b26;
    --code-text: #c0caf5;
    --selection-background: #3d59a1;
    --selection-text: #ffffff;
  }
}

:root[data-theme="light"] {
  /* Manual light override */
  --background: #f4f8f3;
  --text: #303230;
  --muted: #5f655e;
  --link: #2c2f2c;
  --content-link: #235a97;
  --rule: #d8dfd5;
  --code-background: #e9e9ef;
  --code-text: #3760bf;
  --selection-background: #cbdfff;
  --selection-text: #1f2a35;
}

:root[data-theme="dark"] {
  /* Manual dark override */
  --background: #151815;
  --text: #e6ebe2;
  --muted: #aab2a6;
  --link: #f0f4ec;
  --content-link: #8ab4f8;
  --rule: #343b33;
  --code-background: #1a1b26;
  --code-text: #c0caf5;
  --selection-background: #3d59a1;
  --selection-text: #ffffff;
}

/* Base */

* {
  box-sizing: border-box;
}

::selection {
  background: var(--selection-background);
  color: var(--selection-text);
}

/* Typography */

html {
  font-family: var(--font-body);
  font-size: 16px;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--background);
  color: var(--text);
  line-height: 1.55;
}

a {
  color: var(--link);
  text-decoration: none;
  text-underline-offset: 0.18em;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

/* Code and prose primitives */

code,
pre {
  font-family: var(--font-mono);
}

code {
  padding: 0.08em 0.25em;
  border-radius: 4px;
  background: var(--code-background);
  color: var(--code-text);
  font-size: 0.9em;
}

pre {
  overflow-x: auto;
  margin: 1.6rem 0;
  padding: 18px 20px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--code-background);
  color: var(--code-text);
  font-size: 0.88rem;
  line-height: 1.55;
}

pre code {
  padding: 0;
  border-radius: 0;
  background: transparent;
  color: inherit;
  font-size: inherit;
}

blockquote {
  margin: 1.6rem 0;
  padding-left: 20px;
  border-left: 2px solid var(--rule);
  color: var(--muted);
}

/* Site frame */

.site {
  width: min(var(--max-width), calc(100% - 48px));
  margin: 0 auto;
  padding: 50px 0 96px;
}

.site-header {
  max-width: var(--content-width);
  margin-inline: auto;
  margin-bottom: 126px;
}

/* Navigation and controls */

.site-nav {
  display: flex;
  gap: 28px;
  align-items: center;
  font-size: clamp(0.98rem, 0.94rem + 0.14vw, 1.06rem);
}

.site-nav a[aria-current="page"] {
  font-weight: 650;
}

.search-trigger,
.theme-toggle {
  font: inherit;
}

.search-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--link);
  cursor: pointer;
}

.search-trigger:hover,
.search-trigger:focus-visible {
  text-decoration: underline;
}

.search-trigger kbd,
.search-modal kbd {
  font-family: var(--font-mono);
  font-size: 0.72em;
  line-height: 1;
}

.search-trigger kbd {
  padding: 3px 5px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  color: var(--muted);
}

.theme-toggle {
  display: inline-grid;
  width: 34px;
  height: 34px;
  margin: 0 0 0 -10px;
  padding: 0;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--link);
  cursor: pointer;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  background: var(--code-background);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}

.theme-toggle__icon {
  display: block;
  width: 19px;
  height: 19px;
  fill: currentColor;
}

.theme-toggle__icon--sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle__icon--moon {
  display: none;
}

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

/* Page content */

.content {
  max-width: var(--content-width);
  margin: 0 auto;
}

.content :is(h1, h2, h3, h4, h5, h6) {
  line-height: 1.2;
  letter-spacing: 0;
}

.content h1 {
  margin: 0 0 54px;
  font-size: clamp(1.85rem, 1.5rem + 1vw, 2.45rem);
  line-height: 1.15;
}

.content h2 {
  margin: 3.4rem 0 1rem;
  font-size: clamp(1.35rem, 1.12rem + 0.55vw, 1.7rem);
}

.content h3 {
  margin: 2.4rem 0 0.85rem;
  font-size: clamp(1.2rem, 1.05rem + 0.35vw, 1.42rem);
}

.content h4 {
  margin: 2rem 0 0.75rem;
  font-size: 1.12rem;
}

.content h5,
.content h6 {
  margin: 1.7rem 0 0.65rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.content :is(h2, h3, h4, h5, h6)[id] {
  scroll-margin-top: 32px;
}

.heading-link {
  color: inherit;
  text-decoration: none !important;
}

.heading-link:hover,
.heading-link:focus-visible {
  text-decoration: none !important;
}

.heading-anchor {
  display: inline-block;
  width: 1.1em;
  margin-left: -1.1em;
  color: var(--rule);
  opacity: 0;
}

.content :is(h2, h3, h4, h5, h6):hover .heading-anchor,
.heading-link:focus-visible .heading-anchor {
  opacity: 1;
}

.heading-link:hover .heading-anchor,
.heading-link:focus-visible .heading-anchor {
  color: var(--muted);
}

.content p {
  margin: 0 0 1.1rem;
  font-size: 1.05rem;
  line-height: 1.55;
}

.home h1 {
  margin-bottom: 50px;
}

/* Home */

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.55rem;
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-size: 1.05rem;
}

.social-links span {
  color: var(--muted);
}

.social-links a {
  color: var(--content-link);
  text-decoration: underline;
  text-decoration-thickness: 0.06em;
}

.social-links a + a::before {
  content: "·";
  margin-right: 0.55rem;
  color: var(--muted);
  text-decoration: none;
  display: inline-block;
}

.recent-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 1rem;
}

.recent-list li {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 18px;
}

.recent-list time {
  color: var(--muted);
  white-space: nowrap;
}

/* Post lists and tags */

.post-list {
  display: grid;
  gap: 28px;
  max-width: 860px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.post-list li {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 24px;
}

.post-list time {
  color: var(--text);
  white-space: nowrap;
}

.post-list a {
  display: inline-block;
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  margin-top: 4px;
}

.post-tags a {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 2px 7px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.82rem;
  font-style: normal;
  line-height: 1;
  text-decoration: none;
}

.post-tags a:hover,
.post-tags a:focus-visible {
  color: var(--link);
  text-decoration: none;
}

.post-list .post-tags {
  margin-top: 5px;
}

.post-list .post-tags a {
  font-size: 0.78rem;
}

.post-list .post-source {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-style: italic;
}

/* Post page */

.post-header {
  margin-bottom: 64px;
}

.post-header p {
  margin: 18px 0 0;
  color: var(--text);
  font-size: clamp(1.05rem, 0.95rem + 0.35vw, 1.24rem);
  line-height: 1.35;
}

.post-header h1 {
  margin-bottom: 0;
}

.post {
  max-width: var(--post-width);
  margin: 0 auto;
}

.post-content > * {
  max-width: var(--post-width);
}

.post-content p {
  margin-bottom: 1.35rem;
  font-size: 1.05rem;
  line-height: 1.52;
}

.about a:not(.heading-link),
.post-content a:not(.heading-link) {
  color: var(--content-link);
  text-decoration: underline;
  text-decoration-thickness: 0.06em;
}

.post-content sup {
  font-size: 0.6em;
  line-height: 0;
}

.post-content hr {
  height: 1px;
  margin: 3rem 0;
  border: 0;
  background: var(--rule);
}

/* Footnotes */

.footnotes {
  margin-top: 3rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.95rem;
}

.post-content h2#footnotes {
  margin-top: 3rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--rule);
}

.post-content h2#footnotes + .footnotes {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.footnotes p,
.footnotes li {
  font-size: inherit;
  line-height: 1.5;
}

.footnotes :target {
  color: var(--text);
}

/* Tags */

.tag-list {
  display: grid;
  gap: 10px;
  max-width: 360px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tag-list li {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: baseline;
}

.tag-list span {
  color: var(--muted);
}

.tag-archive__eyebrow {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Search modal */

.search-is-open {
  overflow: hidden;
}

.search-modal[hidden] {
  display: none;
}

.search-modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: start center;
  padding: 14vh 20px 20px;
}

.search-modal__backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
}

.search-modal__panel {
  position: relative;
  z-index: 1;
  width: min(620px, 100%);
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: 14px;
  background: var(--background);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

.search-modal__form {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  margin: 12px;
  padding: 0 14px;
  border: 2px solid #4a9bff;
  border-radius: 8px;
  background: var(--code-background);
}

.search-modal__icon {
  width: 20px;
  height: 20px;
  color: var(--muted);
}

.search-modal__input {
  width: 100%;
  min-height: 52px;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font: 500 1.22rem/1 var(--font-body);
}

.search-modal__input::placeholder {
  color: var(--muted);
}

.search-modal__results {
  min-height: 54px;
  max-height: min(42vh, 340px);
  overflow-y: auto;
  border-top: 1px solid var(--rule);
}

.search-modal__message {
  margin: 0;
  padding: 18px 20px;
  color: var(--muted);
  font-size: 1.05rem;
}

.search-result {
  display: grid;
  gap: 5px;
  padding: 13px 20px;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
}

.search-result:hover,
.search-result[aria-selected="true"] {
  background: var(--code-background);
  text-decoration: none;
}

.search-result__title {
  font-weight: 650;
}

.search-result__excerpt {
  color: var(--muted);
  font-size: 1.05rem;
}

.search-result mark {
  border-radius: 3px;
  background: color-mix(in srgb, #4a9bff 25%, transparent);
  color: inherit;
}

.search-modal__footer {
  display: flex;
  gap: 22px;
  align-items: center;
  min-height: 44px;
  padding: 0 20px;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9rem;
}

.search-modal__footer span {
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.search-modal__footer kbd {
  padding: 5px 7px;
  border: 1px solid var(--rule);
  border-radius: 5px;
  background: var(--code-background);
  color: var(--text);
}

/* Syntax highlighting: Tokyo Night Day */

.highlight .c,
.highlight .cm,
.highlight .c1,
.highlight .cp {
  color: #848cb5;
}

.highlight .k,
.highlight .kd,
.highlight .kn,
.highlight .kp,
.highlight .kr,
.highlight .kt {
  color: #9854f1;
  font-weight: 600;
}

.highlight .s,
.highlight .s1,
.highlight .s2,
.highlight .sb,
.highlight .sc,
.highlight .sd,
.highlight .se,
.highlight .sh,
.highlight .si,
.highlight .sx {
  color: #587539;
}

.highlight .mi,
.highlight .mf,
.highlight .mh,
.highlight .mo {
  color: #b15c00;
}

.highlight .nf,
.highlight .na {
  color: #2e7de9;
  font-weight: 600;
}

.highlight .nc,
.highlight .nn,
.highlight .nt {
  color: #007197;
  font-weight: 600;
}

.highlight .nd,
.highlight .nb,
.highlight .bp {
  color: #8c6c3e;
}

.highlight .n,
.highlight .nv,
.highlight .vc,
.highlight .vg,
.highlight .vi {
  color: #3760bf;
}

.highlight .o,
.highlight .ow,
.highlight .p {
  color: #6172b0;
}

.highlight .err,
.highlight .gr,
.highlight .gt {
  color: #f52a65;
}

.highlight .gi {
  color: #587539;
}

.highlight .gd {
  color: #f52a65;
}

/* Syntax highlighting: Tokyo Night */

@media (prefers-color-scheme: dark) {
  .highlight .c,
  .highlight .cm,
  .highlight .c1,
  .highlight .cp {
    color: #565f89;
  }

  .highlight .k,
  .highlight .kd,
  .highlight .kn,
  .highlight .kp,
  .highlight .kr,
  .highlight .kt {
    color: #bb9af7;
  }

  .highlight .s,
  .highlight .s1,
  .highlight .s2,
  .highlight .sb,
  .highlight .sc,
  .highlight .sd,
  .highlight .se,
  .highlight .sh,
  .highlight .si,
  .highlight .sx {
    color: #9ece6a;
  }

  .highlight .mi,
  .highlight .mf,
  .highlight .mh,
  .highlight .mo {
    color: #ff9e64;
  }

  .highlight .nf,
  .highlight .na {
    color: #7aa2f7;
  }

  .highlight .nc,
  .highlight .nn,
  .highlight .nt {
    color: #7dcfff;
  }

  .highlight .nd,
  .highlight .nb,
  .highlight .bp {
    color: #e0af68;
  }

  .highlight .n,
  .highlight .nv,
  .highlight .vc,
  .highlight .vg,
  .highlight .vi,
  .highlight .o,
  .highlight .ow,
  .highlight .p {
    color: var(--code-text);
  }

  .highlight .err,
  .highlight .gr,
  .highlight .gt {
    color: #f7768e;
  }

  .highlight .gi {
    color: #9ece6a;
  }

  .highlight .gd {
    color: #f7768e;
  }
}

/* Responsive */

@media (max-width: 680px) {
  .site {
    width: min(100% - 32px, var(--max-width));
    padding-top: 30px;
  }

  .site-header {
    margin-bottom: 82px;
  }

  .site-nav {
    gap: 18px;
    flex-wrap: wrap;
  }

  .search-trigger kbd {
    display: none;
  }

  .search-modal {
    padding: 16px 12px;
  }

  .search-modal__panel {
    border-radius: 10px;
  }

  .search-modal__input {
    min-height: 50px;
    font-size: 1.12rem;
  }

  .search-modal__footer {
    min-height: 44px;
    padding: 0 18px;
  }

  .content h1 {
    margin-bottom: 34px;
  }

  .content h2 {
    margin-top: 2.6rem;
  }

  .social-links {
    margin-top: 58px;
  }

  .recent-list li {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .post-list {
    gap: 26px;
  }

  .post-list li {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}