:root {
  color-scheme: light;
  --color-bg: #ffffff;
  --color-surface: #f8fafc;
  --color-border: #e5e7eb;
  --color-text: #111827;
  --color-muted: #6b7280;
  --color-subtle: #9ca3af;
  --color-accent: #2563eb;
  --color-code-bg: #f3f4f6;
  --shadow-soft: 0 1px 2px rgba(17, 24, 39, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --color-bg: #0b0f14;
    --color-surface: #111827;
    --color-border: #243244;
    --color-text: #e5e7eb;
    --color-muted: #9ca3af;
    --color-subtle: #6b7280;
    --color-accent: #60a5fa;
    --color-code-bg: #0f172a;
    --shadow-soft: none;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-size: 17px;
  line-height: 1.8;
}

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

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

code,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

pre {
  overflow-x: auto;
  padding: 16px;
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

th,
td {
  border: 1px solid var(--color-border);
  padding: 8px 12px;
}

.site-container {
  width: min(1120px, calc(100% - 32px));
  margin-inline: auto;
}

.site-header,
.site-footer {
  border-block: 1px solid var(--color-border);
  background: var(--color-bg);
}

.site-header__inner,
.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 18px;
}

.site-title {
  color: var(--color-text);
  font-weight: 700;
  text-decoration: none;
}

.site-description {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
}

.site-nav__list,
.footer-nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.archive-header,
.home-intro,
.home-section {
  padding-block: 48px 24px;
}

.content-grid,
.series-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.content-card,
.series-card {
  display: block;
  padding: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: var(--shadow-soft);
  text-decoration: none;
}

.content-card__title {
  margin: 0 0 8px;
  font-size: 20px;
  line-height: 1.4;
}

.content-card__title a {
  color: var(--color-text);
  text-decoration: none;
}

.content-card__meta,
.content-card__excerpt,
.content-card__tags,
.article-meta,
.article-series {
  color: var(--color-muted);
  font-size: 14px;
}

.content-card__image {
  display: block;
  margin: -20px -20px 16px;
}

.content-card__image img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 8px 8px 0 0;
}

.article-shell {
  display: grid;
  grid-template-columns: minmax(0, 760px) 240px;
  gap: 56px;
  align-items: start;
  padding-block: 56px;
}

.article-layout {
  max-width: 820px;
  padding-block: 56px;
}

.article-content,
.project-content {
  min-width: 0;
}

.article-content h1 {
  font-size: clamp(32px, 6vw, 44px);
  line-height: 1.25;
}

.entry-content > * + * {
  margin-top: 1.15em;
}

.article-toc {
  position: sticky;
  top: 24px;
  padding: 16px;
  border-left: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 14px;
}

.article-toc__title {
  margin: 0 0 8px;
  color: var(--color-text);
  font-weight: 700;
}

.article-toc ol {
  margin: 0;
  padding-left: 18px;
}

.toc-item--h3 {
  margin-left: 12px;
}

.project-meta {
  display: grid;
  gap: 12px;
  padding: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

.project-meta div {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 16px;
}

.project-meta dt {
  color: var(--color-muted);
  font-weight: 700;
}

@media (max-width: 860px) {
  .site-header__inner,
  .site-footer__inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .article-shell {
    display: block;
    padding-block: 32px;
  }

  .article-toc {
    position: static;
    margin-top: 32px;
    border-left: 0;
    border-top: 1px solid var(--color-border);
  }

  .project-meta div {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}