/* ========================================================
   Variables
======================================================== */
:root {
  --font-cn-sans: "Sarasa UI SC", "Source Han Sans SC", "Noto Sans SC";
  --font-cn-serif: "Source Han Serif SC", "Noto Serif SC";
  --font-system: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, var(--font-cn-sans), sans-serif;
  --font-serif: "Lyon Text Web", Garamond, Baskerville, ui-serif, "New York", var(--font-cn-serif), serif;
  --font-mono: ui-monospace, "SF Mono", "Roboto Mono", Consolas, Arimo, "Liberation Mono", "Source Code Pro", var(--font-cn-sans), monospace;
  --color-accent: rgb(42, 46, 205);
  --color-bg: rgb(246, 244, 239);
  --color-text: rgba(0, 0, 0, 0.8);
  --color-elevated: rgba(42, 46, 205, 0.07);
  --color-demoted: rgba(0, 0, 0, 0.7);
}

/* ========================================================
   Reset & Base Document Styles
======================================================== */
html {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-serif);
  font-size: 18.5px;
  line-height: 1.6;
}
body {
  margin: 8px;
}
::selection {
  background: var(--color-accent);
  color: var(--color-bg);
}
hr {
  border: 0;
  border-top: 2px dotted var(--color-accent);
  margin: 1em 0;
}
blockquote {
  border-left: 2px solid var(--color-accent);
  color: var(--color-accent);
  margin: 0;
  padding-left: 1em;
}
dd {
  padding: 0.5em 0;
}

/* ========================================================
   Typography
======================================================== */
[lang="zh"]           { font-size: 0.9em; }
[class="meta date"]   { font-style: italic; }

/* Headings (common baseline) */
h1, h2, h3, h4, h5, h6 {
  font-size: 1.2em;
  margin-top: 2em;
  color: var(--color-accent);
  font-weight: normal;
}

/* Headings - Specifics & Prefixes */
h1.tags::before     { content: "# "; color: var(--color-accent); }

/* Article & Title */
.title h1, article .title { margin-bottom: 0; }
article .title            { margin-bottom: 1em; }

/* Section Markers */
main h2::before    { content: ">> ";      font-size: smaller; }
main h3::before    { content: ">>> ";     font-size: smaller; }
h4::before         { content: ">>>> ";    font-size: smaller; }
h5::before         { content: ">>>>> ";   font-size: smaller; }
h6::before         { content: ">>>>>> ";  font-size: smaller; }

/* Suppress h4 prefix in figcaption context */
figcaption > h4::before { content: none; }

/* ========================================================
   Links
======================================================== */
a {
  color: inherit;
  text-decoration: none;
  border-bottom: 2px solid var(--color-accent);
}
a:hover {
  background: var(--color-accent);
  color: var(--color-bg);
}
body header a, main h1 a, .page-item a, a.readmore,
a.footnote-ref, a.footnote-backref {
  color: var(--color-accent);
  border: none;
}
a.footnote-ref, a.footnote-backref {
  font-weight: initial;
}

/* ========================================================
   Lists
======================================================== */
ul {
  list-style: none;
  padding-left: 2ch;
}
ul li {
  position: relative;
  padding-left: 1em;
}
ul > li::marker {
  content: "•";
  color: var(--color-accent);
  font-weight: bold;
  position: absolute;
  left: 0;
  top: 0;
}
ul.pagination {
  padding-left: 0;
}
.tags li::marker {
  content: "# ";
}

/* ========================================================
   Code and Pre
======================================================== */
pre, code {
  font-family: var(--font-mono);
  background: var(--color-elevated);
  font-size: 0.8em;
}
code {
  padding: 0.1em 0.2em;
}
pre {
  padding: 1em;
  overflow-x: auto;
  line-height: 1.4;
}
pre code {
  background: none;
  color: inherit;
  font-size: 100%;
  padding: 0;
}

/* Inline lang="zh" exception */
code [lang="zh"], pre [lang="zh"] {
  font-size: 1em;
}

/* Syntax Highlighting */
.highlight, .highlight pre code[class*="language-"] {
  position: relative;
  -webkit-overflow-scrolling: touch;
}

/* ========================================================
   Tables
======================================================== */
table {
  border-spacing: 0;
  border-collapse: collapse;
  font-size: smaller;
}
th, td {
  padding: 0.5em;
}
th {
  border-width: 3px 0 1px 0;
  border-style: solid;
  border-color: var(--color-accent);
  font-weight: bold;
  color: var(--color-accent);
  text-align: start;
}
tr {
  border-width: 0 0 1px 0;
  border-style: solid;
  border-color: var(--color-accent);
}

/* ========================================================
   Components & Layout Blocks
======================================================== */
.content {
  margin: 0 auto 4em auto;
  max-width: 800px;
  padding: 0 1ch;
  word-wrap: break-word;
}
footer {
  margin-top: 1em;
}
header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  margin: 1em 0;
}
header .main {
  font-size: 1.5em;
  letter-spacing: 0.05em;
  font-weight: 300;
  font-variant: small-caps;
}
.nav-links {
  font-variant: small-caps;
}
.site-description {
  display: flex;
  justify-content: space-between;
}

/* --------------------------------------------------------
   Posts, Tags, Navigation
--------------------------------------------------------- */
.posts .post a,
.tags a,
.tags a:hover,
a.readmore {
  border-bottom: none; /* Remove border for tag/links (override) */
}
.tags a:hover,
.tags a:focus {
  background-color: var(--color-accent);
}

/* Post meta */
.post-tags {
  border-top: 2px dotted var(--color-accent);
}

/* Draft */
.draft-label {
  color: var(--color-accent);
  text-decoration: none;
  padding: 2px 4px;
  border-radius: 4px;
  margin-left: 6px;
  background: var(--color-elevated);
}

/* ========================================================
   Callouts & Notices
======================================================== */
.callout {
  background: var(--color-accent);
  color: var(--color-bg);
  padding: 1em;
}
.callout p { margin: 0; }
.callout a {
  border-bottom: 3px solid var(--color-bg);
}
.callout a:hover, .callout a:focus {
  background: var(--color-bg);
  color: var(--color-accent);
}
.staleness-warning {
  font-style: italic;
  color: var(--color-accent);
}

/* Table of Contents */
.toc {
  font-size: 0.8em;
  color: var(--color-accent);
}
.toc a {
  border: none;
}

/* ========================================================
   Figures & Images
======================================================== */
img {
  border: 2px solid #ececec;
  max-width: 100%;
}
figure {
  display: inline-block;
  margin: 0;
  max-width: 100%;
  box-sizing: border-box;
}
figure img { max-height: 500px; }
figcaption > * {
  font-size: small;
  font-weight: bold;
  color: var(--color-accent);
}
figure h4 {
  margin: 0 0 1em 0;
}

/* SVG icon sizing */
svg { max-height: 16px; }

/* ========================================================
   Media Queries
======================================================== */
@media (min-width: 600px) {
  figure { padding: 0 40px; }
}