:root {
  color-scheme: light;
  --bg: #ffffff;
  --bg-subtle: #f6f8fa;
  --text: #1f2328;
  --text-muted: #656d76;
  --border: #d0d7de;
  --accent: #0969da;
  --code-bg: #f6f8fa;
  --tok-kw: #cf222e;
  --tok-str: #0a3069;
  --tok-cmt: #6e7781;
  --tok-num: #0550ae;
  --tok-fn: #8250df;
  --font: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Cascadia Code", "Source Code Pro", ui-monospace, monospace;
  --header-h: 56px;
  --ease: 80ms linear;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d1117;
  --bg-subtle: #161b22;
  --text: #e6edf3;
  --text-muted: #9198a1;
  --border: #30363d;
  --accent: #4493f8;
  --code-bg: #161b22;
  --tok-kw: #ff7b72;
  --tok-str: #a5d6ff;
  --tok-cmt: #8b949e;
  --tok-num: #79c0ff;
  --tok-fn: #d2a8ff;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: color-mix(in srgb, var(--accent) 22%, transparent);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

button,
input,
textarea {
  font: inherit;
}

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

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  z-index: 80;
  background: var(--accent);
  color: #fff;
  padding: 6px 10px;
  text-decoration: none;
}

.skip:focus {
  top: 8px;
}

.header-shell {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.site-header {
  position: relative;
  max-width: 1080px;
  margin: 0 auto;
  min-height: var(--header-h);
  padding: 0 20px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 12px;
}

.brand {
  order: 1;
  margin-right: auto;
  color: var(--text);
  font-weight: 600;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand:hover {
  color: var(--accent);
}

.theme-toggle {
  order: 3;
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  padding: 0;
  transition: background-color var(--ease), border-color var(--ease), color var(--ease);
}

.theme-toggle:hover {
  background: var(--bg-subtle);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  display: block;
}

.theme-toggle .icon-sun {
  display: none;
}

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

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

.nav-check {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  border: 0;
}

.nav-toggle {
  display: none;
  order: 4;
  height: 34px;
  padding: 0 10px;
  align-items: center;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 14px;
}

.nav-check:focus-visible + .nav-toggle {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.site-nav {
  order: 2;
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 8px;
  font-size: 0.95rem;
  transition: color var(--ease), background-color var(--ease);
}

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

.site-nav a[aria-current="page"] {
  color: var(--text);
  box-shadow: inset 0 -1px 0 var(--accent);
}

main {
  padding: 36px 0 80px;
}

.wrap {
  width: min(760px, 100%);
  margin-inline: auto;
  padding-inline: 20px;
}

.wrap-wide {
  width: min(960px, 100%);
  margin-inline: auto;
  padding-inline: 20px;
}

.kicker,
.stats,
.post-meta,
.archive-item time,
.archive-cat,
.toc-title,
.month-label,
.year-nav a,
.skill-group li,
.post-tags a,
.tag-cloud a,
.pager,
.identity-tags li,
.copy-btn,
.codeblock-bar,
.avatar,
.footer-links,
.time {
  font-family: var(--mono);
}

.kicker {
  margin: 0 0 8px;
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.identity h1,
.page-title,
.post-header h1 {
  margin: 0 0 10px;
  font-size: 1.7rem;
  line-height: 1.35;
  letter-spacing: -0.03em;
  font-weight: 600;
}

.lede,
.muted {
  color: var(--text-muted);
}

.lede {
  margin: 0 0 12px;
}

.identity-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
}

.identity-tags li {
  font-size: 12px;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 2px 8px;
}

.cat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 0 0 8px;
}

.cat-chips a {
  color: var(--text);
  text-decoration: none;
}

.cat-chips a:hover,
.cat-chips a.is-active {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.cat-chips a.is-active {
  color: var(--accent);
}

.post-list {
  border-top: 1px solid var(--border);
}

.post-link {
  display: block;
  margin: 0 -12px;
  padding: 18px 12px;
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: background-color var(--ease);
}

.post-link:hover {
  background: var(--bg-subtle);
}

.post-link h2 {
  margin: 0 0 6px;
  font-size: 1.15rem;
  line-height: 1.45;
  font-weight: 600;
  transition: color var(--ease);
}

.post-link:hover h2 {
  color: var(--accent);
}

.post-meta {
  margin: 0;
  color: var(--text-muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.post-meta .sep {
  margin: 0 6px;
}

.excerpt {
  margin: 8px 0;
  color: var(--text-muted);
  line-height: 1.7;
}

.post-link .mini-tags {
  margin: 8px 0 0;
  color: var(--text-muted);
  font-family: var(--mono);
  font-size: 12px;
}

.post-link .mini-tags span + span::before {
  content: " · ";
}

.pager {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  font-size: 13px;
}

.page-nums {
  display: flex;
  gap: 8px;
}

.page-num,
.page-nav,
.page-gap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  padding: 0 8px;
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  background: transparent;
}

a.page-num:hover,
a.page-nav:hover {
  background: var(--bg-subtle);
}

.page-num.is-current {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
}

.page-gap,
.is-disabled {
  color: var(--text-muted);
}

.author-teaser {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.author-teaser p {
  margin: 0 0 10px;
}

.empty {
  padding: 36px 0;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.empty p {
  margin: 0 0 8px;
}

.post-layout {
  width: min(1080px, 100%);
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: minmax(0, 760px) 220px;
  gap: 48px;
  justify-content: center;
  align-items: start;
}

.post-layout > article {
  min-width: 0;
}

.post-header h1 {
  font-size: 1.85rem;
}

.post-meta a {
  color: var(--text-muted);
  text-decoration: none;
}

.post-meta a:hover {
  color: var(--accent);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.post-tags a,
.tag-cloud a {
  text-decoration: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: color var(--ease), border-color var(--ease), background-color var(--ease);
}

.post-tags a {
  font-size: 12px;
  padding: 2px 8px;
}

.post-tags a:hover,
.tag-cloud a:hover {
  color: var(--text);
  border-color: var(--text-muted);
  background: var(--bg-subtle);
}

.tag-cloud a.is-active,
.post-tags a.is-active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--bg-subtle);
}

.toc-mobile {
  display: none;
}

.toc {
  position: sticky;
  top: 80px;
}

.toc-title,
.toc-mobile summary {
  font-size: 12px;
  color: var(--text-muted);
}

.toc-title {
  margin: 0 0 8px;
}

.toc a {
  display: block;
  color: var(--text-muted);
  text-decoration: none;
  padding: 4px 0 4px 10px;
  border-left: 1px solid var(--border);
  line-height: 1.45;
  font-size: 0.88rem;
  transition: color var(--ease), border-color var(--ease);
}

.toc a.level-3 {
  padding-left: 22px;
}

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

.toc a.is-active {
  color: var(--accent);
  border-left-color: var(--accent);
}

.article {
  font-size: 1.0625rem;
  line-height: 1.85;
  margin-top: 28px;
}

.article h2,
.article h3,
.year-block,
.month-label {
  scroll-margin-top: 76px;
}

.article h2 {
  font-size: 1.28rem;
  line-height: 1.4;
  margin: 2.2rem 0 0.75rem;
}

.article h3 {
  font-size: 1.06rem;
  margin: 1.6rem 0 0.5rem;
}

.article p {
  margin: 0 0 1rem;
}

.article ul,
.article ol {
  margin: 0 0 1rem;
  padding-left: 1.3rem;
}

.article li {
  margin: 0.35rem 0;
}

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

.article blockquote {
  margin: 1.2rem 0;
  padding: 0.1rem 0 0.1rem 1rem;
  border-left: 3px solid var(--accent);
  color: var(--text-muted);
}

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

.article p code,
.article li code,
.article td code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  padding: 0.05em 0.35em;
}

.table-wrap {
  overflow-x: auto;
  margin: 1.2rem 0 1.4rem;
}

.article table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.95rem;
  line-height: 1.6;
}

.article th,
.article td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

.article th {
  background: var(--bg-subtle);
  font-weight: 600;
}

.figure {
  margin: 1.4rem 0;
  padding: 12px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
}

.figure svg,
.figure img {
  display: block;
  width: 100%;
  height: auto;
  color: var(--text);
}

.figure [data-zoom],
.article [data-zoom] {
  cursor: zoom-in;
}

.figure figcaption {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

.codeblock {
  margin: 1.25rem 0 1.5rem;
  border: 1px solid var(--border);
  background: var(--code-bg);
}

.codeblock-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
}

.copy-btn {
  font-size: 12px;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
  padding: 2px 8px;
  cursor: pointer;
  transition: color var(--ease), border-color var(--ease), background-color var(--ease);
}

.copy-btn:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

.copy-btn.is-done {
  color: var(--accent);
  border-color: var(--accent);
}

.codeblock pre {
  margin: 0;
  padding: 14px 16px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.65;
  tab-size: 2;
}

.codeblock pre code {
  font-family: inherit;
  font-size: inherit;
  display: block;
  white-space: pre;
}

.tok-kw { color: var(--tok-kw); }
.tok-str { color: var(--tok-str); }
.tok-cmt { color: var(--tok-cmt); }
.tok-num { color: var(--tok-num); }
.tok-fn { color: var(--tok-fn); }

.copyright {
  margin-top: 28px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.88rem;
}

.end-tags {
  margin-top: 28px;
}

.end-label {
  margin: 0 0 8px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.post-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 16px;
}

.post-pager a {
  display: block;
  padding: 12px;
  border: 1px solid var(--border);
  color: inherit;
  text-decoration: none;
  transition: background-color var(--ease);
}

.post-pager a:hover {
  background: var(--bg-subtle);
}

.post-pager a:hover .ttl {
  color: var(--accent);
}

.post-pager .dir {
  display: block;
  margin-bottom: 4px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-muted);
}

.post-pager .ttl {
  display: block;
  line-height: 1.45;
  transition: color var(--ease);
}

.post-pager .next {
  grid-column: 2;
  text-align: right;
}

.post-pager .prev {
  grid-column: 1;
}

.back-link {
  display: inline-block;
  margin-top: 16px;
}

.stats {
  margin: 0 0 12px;
  color: var(--text-muted);
  font-size: 13px;
}

.year-nav {
  display: flex;
  gap: 14px;
  position: sticky;
  top: var(--header-h);
  z-index: 15;
  background: var(--bg);
  padding: 8px 0;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.year-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
}

.year-nav a:hover {
  color: var(--accent);
}

.year-block {
  margin-top: 28px;
}

.year-block h2 {
  margin: 0;
  font-size: 1.35rem;
}

.month-label {
  margin: 16px 0 0;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 400;
}

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

.archive-item {
  display: grid;
  grid-template-columns: 4.6em minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.archive-item time,
.archive-cat {
  font-size: 12px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.archive-item a {
  color: var(--text);
  text-decoration: none;
}

.archive-item a:hover {
  color: var(--accent);
}

.section-gap {
  margin-top: 28px;
}

.cat-grid,
.skill-grid,
.project-grid {
  display: grid;
  gap: 12px;
}

.cat-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 16px;
}

.cat-card,
.skill-group,
.project-card {
  display: block;
  border: 1px solid var(--border);
  background: var(--bg);
  padding: 16px;
  color: inherit;
  text-decoration: none;
  transition: background-color var(--ease), border-color var(--ease);
}

.cat-card:hover,
.project-card:hover {
  background: var(--bg-subtle);
}

.cat-card.is-active {
  border-color: var(--accent);
}

.cat-card h2,
.skill-group h3,
.project-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.cat-card p,
.project-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

.cat-count {
  display: block;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-muted);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.tag-cloud a {
  padding: 4px 8px;
  line-height: 1.4;
  color: var(--text);
}

.tag-cloud .tag-count {
  color: var(--text-muted);
  margin-left: 4px;
}

.tag-cloud a.is-active .tag-count {
  color: var(--accent);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: baseline;
  margin: 8px 0 0;
}

.about-head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.avatar {
  width: 64px;
  height: 64px;
  flex: none;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  font-size: 1.35rem;
  font-weight: 600;
  font-family: var(--font);
}

.about-head h1 {
  margin: 0 0 4px;
  font-size: 1.6rem;
}

.role {
  margin: 0 0 8px;
  color: var(--text-muted);
}

.about-section {
  margin-top: 40px;
}

.about-section h2 {
  margin: 0 0 14px;
  font-size: 1.15rem;
}

.skill-grid,
.project-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.skill-group ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0;
  margin: 0;
}

.skill-group li {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg-subtle);
  padding: 2px 6px;
}

.project-card h3 a {
  color: var(--text);
  text-decoration: none;
}

.project-card h3 a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.project-card .mini-tags {
  margin: 12px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-muted);
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 4px;
  border-left: 1px solid var(--border);
}

.timeline li {
  position: relative;
  padding: 0 0 22px 20px;
}

.timeline li::before {
  content: "";
  width: 7px;
  height: 7px;
  border: 1px solid var(--accent);
  background: var(--bg);
  position: absolute;
  left: -4px;
  top: 0.45em;
}

.timeline .time {
  margin: 0;
  color: var(--text-muted);
  font-size: 12px;
}

.timeline h3 {
  margin: 2px 0;
  font-size: 1rem;
}

.timeline p {
  margin: 0;
  color: var(--text-muted);
}

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

.contact-list li + li {
  margin-top: 8px;
}

.contact-list a:hover {
  text-decoration-thickness: 2px;
}

.footer-shell {
  border-top: 1px solid var(--border);
}

.site-footer {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 20px 40px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-name {
  margin: 0 0 8px;
}

.footer-name a {
  color: var(--text);
  text-decoration: none;
}

.footer-name a:hover {
  color: var(--accent);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 0 0 8px;
  font-size: 13px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-note {
  margin: 0;
  font-size: 0.85rem;
}

.lightbox:not([hidden]) {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 56px 20px 32px;
  background: rgba(13, 17, 23, 0.92);
}

.lightbox[hidden] {
  display: none;
}

.lightbox-close {
  position: absolute;
  top: 16px;
  right: 16px;
  font-family: var(--mono);
  font-size: 13px;
  color: #fff;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.45);
  padding: 6px 10px;
  cursor: pointer;
}

.lightbox-frame {
  max-width: min(960px, 100%);
  max-height: 82vh;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 16px;
}

.lightbox-frame svg,
.lightbox-frame img {
  display: block;
  max-width: 100%;
  max-height: calc(82vh - 32px);
  width: auto;
  height: auto;
  margin: 0 auto;
  cursor: zoom-out;
}

body.no-scroll {
  overflow: hidden;
}

.noscript {
  color: var(--text-muted);
}

@media (max-width: 959px) {
  .post-layout {
    grid-template-columns: minmax(0, 760px);
  }

  .toc-desktop {
    display: none;
  }

  .toc-mobile {
    display: block;
    margin: 18px 0 0;
    border: 1px solid var(--border);
    padding: 8px 12px;
  }

  .toc-mobile summary {
    cursor: pointer;
  }

  .toc-mobile .toc {
    position: static;
    margin-top: 8px;
  }

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

@media (max-width: 800px) {
  .skill-grid,
  .project-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    order: 5;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0 -20px;
    padding: 8px 12px 12px;
    border-top: 1px solid var(--border);
  }

  .nav-check:checked ~ .site-nav {
    display: flex;
  }

  .site-nav a {
    padding: 10px 8px;
  }
}

@media (max-width: 560px) {
  .identity h1,
  .page-title,
  .post-header h1 {
    font-size: 1.45rem;
  }

  .archive-item {
    grid-template-columns: 4.2em minmax(0, 1fr);
  }

  .archive-cat {
    grid-column: 2;
  }

  .post-pager {
    grid-template-columns: 1fr;
  }

  .post-pager .next,
  .post-pager .prev {
    grid-column: auto;
    text-align: left;
  }

  .cat-grid,
  .skill-grid,
  .project-grid {
    grid-template-columns: 1fr;
  }
}