/*
 * Blog styles (blog list, posts, tags).
 * Modeled on the PaperMod look used by https://lilianweng.github.io/.
 * Kept outside assets/css/ so the deploy step's PurgeCSS pass leaves it alone
 * (several selectors here target elements created at runtime by MathJax and JS).
 */

:root {
  --gap: 24px;
  --content-gap: 20px;
  --nav-width: 1024px;
  --main-width: 720px;
  --header-height: 60px;
  --radius: 8px;

  --theme: rgb(255, 255, 255);
  --entry: rgb(255, 255, 255);
  --primary: rgb(30, 30, 30);
  --secondary: rgb(108, 108, 108);
  --tertiary: rgb(214, 214, 214);
  --content: rgb(31, 31, 31);
  --code-block-bg: rgb(28, 29, 33);
  --code-bg: rgb(245, 245, 245);
  --border: rgb(238, 238, 238);
}

html[data-theme="dark"] {
  --theme: rgb(29, 30, 32);
  --entry: rgb(46, 46, 51);
  --primary: rgb(218, 218, 219);
  --secondary: rgb(155, 156, 157);
  --tertiary: rgb(65, 66, 68);
  --content: rgb(196, 196, 197);
  --code-block-bg: rgb(46, 46, 51);
  --code-bg: rgb(55, 56, 62);
  --border: rgb(51, 51, 51);
}

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

html {
  -webkit-tap-highlight-color: transparent;
  overflow-y: scroll;
}

body {
  margin: 0;
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "segoe ui",
    Roboto,
    Oxygen,
    Ubuntu,
    Cantarell,
    "open sans",
    "helvetica neue",
    sans-serif;
  font-size: 16px;
  line-height: 1.6;
  word-break: break-word;
  background: var(--theme);
  color: var(--primary);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

/* ---------- layout ---------- */

.main {
  position: relative;
  flex: 1 0 auto;
  width: 100%;
  max-width: calc(var(--main-width) + var(--gap) * 2);
  margin: 0 auto;
  padding: var(--gap);
}

.footer {
  max-width: calc(var(--main-width) + var(--gap) * 2);
  width: 100%;
  margin: 0 auto;
  padding: calc((var(--header-height) - var(--gap)) / 2) var(--gap);
  text-align: center;
  font-size: 12px;
  line-height: 24px;
  color: var(--secondary);
}

.footer a:hover {
  color: var(--primary);
  border-bottom: 1px solid var(--primary);
}

/* ---------- blog list ---------- */

.page-header {
  margin: 24px 0 32px;
}

.page-header h1 {
  margin: 0;
  font-size: 34px;
  line-height: 1.2;
}

.page-header p {
  margin: 8px 0 0;
  color: var(--secondary);
  font-size: 14px;
}

.post-entry {
  position: relative;
  margin-bottom: var(--gap);
  padding: var(--gap);
  background: var(--entry);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 0.1s;
}

.post-entry:active {
  transform: scale(0.96);
}

.entry-header h2 {
  margin: 0;
  font-size: 24px;
  line-height: 1.3;
}

.entry-content {
  margin: 8px 0;
  color: var(--secondary);
  font-size: 14px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  overflow: hidden;
}

.entry-content p {
  margin: 0;
}

.entry-footer {
  color: var(--secondary);
  font-size: 13px;
}

.entry-link {
  position: absolute;
  inset: 0;
}

.tag-index h2 {
  margin: 32px 0 12px;
  font-size: 24px;
}

.tag-index ul {
  margin: 0;
  padding-inline-start: 20px;
}

.tag-index li {
  margin-top: 5px;
}

.tag-index li a {
  box-shadow: 0 1px 0 var(--primary);
}

.tag-index .date {
  color: var(--secondary);
  font-size: 14px;
}

/* ---------- single post ---------- */

.post-header {
  margin: 24px auto var(--content-gap);
}

.post-title {
  margin: 0 0 2px;
  font-size: 36px;
  line-height: 1.2;
}

.post-description {
  margin-top: 10px;
  margin-bottom: 5px;
  color: var(--secondary);
}

.post-meta {
  color: var(--secondary);
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.toc {
  margin: 0 2px 40px 2px;
  border: 1px solid var(--border);
  background: var(--code-bg);
  border-radius: var(--radius);
  padding: 0.4em;
  font-size: 15px;
  line-height: 1.6;
}

html[data-theme="dark"] .toc {
  background: var(--entry);
}

.toc details summary {
  cursor: pointer;
  margin-inline-start: 20px;
}

.toc .details {
  display: inline;
  font-weight: 500;
}

.toc .inner {
  margin: 0 20px;
  padding: 10px 20px;
}

.toc ul {
  margin: 0;
  padding-inline-start: 20px;
  list-style-type: disc;
}

.toc li {
  margin-top: 0;
}

.toc li a:hover {
  box-shadow: 0 1px 0 var(--primary);
}

/* ---------- post content ---------- */

.post-content {
  color: var(--content);
}

.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5 {
  color: var(--primary);
  line-height: 1.2;
}

.post-content h2 {
  margin: 40px 0 16px;
  font-size: 28px;
}

.post-content h3 {
  margin: 24px 0 16px;
  font-size: 22px;
}

.post-content h4 {
  margin: 20px 0 12px;
  font-size: 18px;
}

.post-content h5 {
  margin: 16px 0 12px;
  font-size: 16px;
}

.post-content .anchor {
  display: none;
  margin-inline-start: 8px;
  color: var(--secondary);
  font-weight: 400;
  box-shadow: none;
}

.post-content h2:hover .anchor,
.post-content h3:hover .anchor,
.post-content h4:hover .anchor,
.post-content h5:hover .anchor {
  display: inline;
}

.post-content a {
  box-shadow: 0 1px 0 var(--primary);
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.post-content a:hover .mjx-container,
.post-content a code {
  box-shadow: none;
}

.post-content p {
  margin: 0 0 var(--content-gap);
}

.post-content ul,
.post-content ol {
  margin: 0 0 var(--content-gap);
  padding-inline-start: 20px;
}

.post-content li {
  margin-top: 5px;
}

.post-content li p {
  margin-bottom: 0;
}

.post-content dl {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
}

.post-content blockquote {
  margin: 20px 0;
  padding: 0 14px;
  border-inline-start: 3px solid var(--primary);
}

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

.post-content hr {
  margin: 30px 0;
  height: 2px;
  background: var(--tertiary);
  border: 0;
}

.post-content table {
  margin-bottom: 32px;
  border-collapse: collapse;
  display: block;
  overflow-x: auto;
}

.post-content table th,
.post-content table td {
  min-width: 80px;
  padding: 8px 5px;
  line-height: 1.5;
  border-bottom: 1px solid var(--border);
  text-align: start;
}

.post-content table th {
  font-size: 14px;
}

.post-content img,
.post-content video {
  max-width: 100%;
  border-radius: 4px;
}

.post-content figure {
  margin: 30px 0;
  text-align: center;
}

.post-content figure img,
.post-content figure video {
  display: block;
  margin: 0 auto;
}

.post-content .references p {
  margin-bottom: 8px;
}

.post-content figcaption {
  margin-top: 8px;
  color: var(--secondary);
  font-size: 15px;
  text-align: center;
}

/* math */

.post-content mjx-container[display="true"] {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 2px 0;
}

/* inline code */

.post-content code {
  margin: auto 4px;
  padding: 4px 6px;
  font-size: 0.78em;
  line-height: 1.5;
  background: var(--code-bg);
  border-radius: 2px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

/* code blocks */

.post-content .highlight,
.post-content pre {
  position: relative;
  margin: 10px 0 var(--content-gap);
  border-radius: var(--radius);
  background: var(--code-block-bg) !important;
}

.post-content pre {
  overflow-x: auto;
  padding: 10px 14px;
  color: rgb(213, 213, 214);
}

.post-content .highlight pre {
  margin: 0;
}

/* Jekyll's {% highlight %} tag wraps code in <figure class="highlight"> */
.post-content figure.highlight {
  text-align: start;
}

.post-content pre code {
  display: block;
  margin: 0;
  padding: 0;
  font-size: 13px;
  line-height: 1.5;
  background: none;
  color: inherit;
  border-radius: 0;
}

.copy-code {
  display: none;
  position: absolute;
  top: 4px;
  right: 4px;
  padding: 0 6px;
  border: 0;
  border-radius: var(--radius);
  background: rgba(78, 78, 78, 0.8);
  color: #fff;
  font-size: 14px;
  line-height: 1.6;
  cursor: pointer;
  user-select: none;
}

.post-content .highlight:hover .copy-code,
.post-content pre:hover .copy-code {
  display: block;
}

/* ---------- post footer ---------- */

.post-footer {
  margin-top: 56px;
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.post-tags a {
  display: block;
  padding: 0 14px;
  font-size: 14px;
  line-height: 34px;
  color: var(--secondary);
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.post-tags a:hover {
  background: var(--border);
}

.paginav {
  display: flex;
  margin: 10px 0;
  line-height: 30px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.paginav a {
  display: flex;
  flex-direction: column;
  padding: 10px 10px;
  font-size: 14px;
  line-height: 1.4;
  width: 50%;
}

.paginav .title {
  letter-spacing: 1px;
  text-transform: uppercase;
  font-size: small;
  color: var(--secondary);
}

.paginav .next {
  margin-inline-start: auto;
  text-align: right;
}

/* ---------- small screens ---------- */

@media screen and (max-width: 768px) {
  :root {
    --gap: 14px;
  }

  .post-title {
    font-size: 30px;
  }

  .toc .inner {
    margin: 0 4px;
    padding: 10px 14px;
  }
}

/* ---------- Rouge syntax highlighting (monokai.sublime) ---------- */
.post-content .highlight table td { padding: 5px; }
.post-content .highlight table pre { margin: 0; }
.post-content .highlight .gh {
  color: #999999;
}
.post-content .highlight .sr {
  color: #f6aa11;
}
.post-content .highlight .go {
  color: #888888;
}
.post-content .highlight .gp {
  color: #555555;
}
.post-content .highlight .ge {
  font-style: italic;
}
.post-content .highlight .ges {
  font-weight: bold;
  font-style: italic;
}
.post-content .highlight .gs {
  font-weight: bold;
}
.post-content .highlight .gu {
  color: #aaaaaa;
}
.post-content .highlight .nb {
  color: #f6aa11;
}
.post-content .highlight .cm {
  color: #75715e;
}
.post-content .highlight .cp {
  color: #75715e;
}
.post-content .highlight .c1 {
  color: #75715e;
}
.post-content .highlight .cs {
  color: #75715e;
}
.post-content .highlight .c, .post-content .highlight .ch, .post-content .highlight .cd, .post-content .highlight .cpf {
  color: #75715e;
}
.post-content .highlight .err {
  color: #960050;
}
.post-content .highlight .gr {
  color: #960050;
}
.post-content .highlight .gt {
  color: #960050;
}
.post-content .highlight .gd {
  color: #49483e;
}
.post-content .highlight .gi {
  color: #49483e;
}
.post-content .highlight .kc {
  color: #66d9ef;
}
.post-content .highlight .kd {
  color: #66d9ef;
}
.post-content .highlight .kr {
  color: #66d9ef;
}
.post-content .highlight .no {
  color: #66d9ef;
}
.post-content .highlight .kt {
  color: #66d9ef;
}
.post-content .highlight .mf {
  color: #ae81ff;
}
.post-content .highlight .mh {
  color: #ae81ff;
}
.post-content .highlight .il {
  color: #ae81ff;
}
.post-content .highlight .mi {
  color: #ae81ff;
}
.post-content .highlight .mo {
  color: #ae81ff;
}
.post-content .highlight .m, .post-content .highlight .mb, .post-content .highlight .mx {
  color: #ae81ff;
}
.post-content .highlight .sc {
  color: #ae81ff;
}
.post-content .highlight .se {
  color: #ae81ff;
}
.post-content .highlight .ss {
  color: #ae81ff;
}
.post-content .highlight .sd {
  color: #e6db74;
}
.post-content .highlight .s2 {
  color: #e6db74;
}
.post-content .highlight .sb {
  color: #e6db74;
}
.post-content .highlight .sh {
  color: #e6db74;
}
.post-content .highlight .si {
  color: #e6db74;
}
.post-content .highlight .sx {
  color: #e6db74;
}
.post-content .highlight .s1 {
  color: #e6db74;
}
.post-content .highlight .s, .post-content .highlight .sa, .post-content .highlight .dl {
  color: #e6db74;
}
.post-content .highlight .na {
  color: #a6e22e;
}
.post-content .highlight .nc {
  color: #a6e22e;
}
.post-content .highlight .nd {
  color: #a6e22e;
}
.post-content .highlight .ne {
  color: #a6e22e;
}
.post-content .highlight .nf, .post-content .highlight .fm {
  color: #a6e22e;
}
.post-content .highlight .vc {
  color: #ffffff;
}
.post-content .highlight .nn {
  color: #ffffff;
}
.post-content .highlight .nl {
  color: #ffffff;
}
.post-content .highlight .ni {
  color: #ffffff;
}
.post-content .highlight .bp {
  color: #ffffff;
}
.post-content .highlight .vg {
  color: #ffffff;
}
.post-content .highlight .vi {
  color: #ffffff;
}
.post-content .highlight .nv, .post-content .highlight .vm {
  color: #ffffff;
}
.post-content .highlight .w {
  color: #ffffff;
}
.post-content .highlight pre {
  color: #f8f8f2;
}
.post-content .highlight .n, .post-content .highlight .py, .post-content .highlight .nx {
  color: #ffffff;
}
.post-content .highlight .ow {
  color: #f92672;
}
.post-content .highlight .nt {
  color: #f92672;
}
.post-content .highlight .k, .post-content .highlight .kv {
  color: #f92672;
}
.post-content .highlight .kn {
  color: #f92672;
}
.post-content .highlight .kp {
  color: #f92672;
}
.post-content .highlight .o {
  color: #f92672;
}