/* ============================================================
   custom.css — Yiming Xu personal site
   Clean, de-duplicated. Loads AFTER the theme's styles.css.
   @import must be first; @font-face next; then tokens & rules.
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Gelasio:ital,wght@0,400;0,500;0,600;0,700;1,400;1,600&family=JetBrains+Mono:wght@400;500&display=swap');

/* 自托管 TeX Gyre Pagella —— GUST 出品的开源 Palatino 克隆(GFL 许可,可自由分发)。
   内嵌为 webfont 后,所有访客(不论 mac/Windows/Linux)都看到同一套 Palatino 字形,
   不再依赖访客系统是否装了 Palatino。字形与系统 Palatino 几乎一致。
   只用到 400/700 × normal/italic 四个 face。文件在 static/fonts/。 */
@font-face { font-family:"TeX Gyre Pagella"; font-style:normal; font-weight:400; font-display:swap; src:url("/fonts/texgyrepagella-regular.woff2") format("woff2"); }
@font-face { font-family:"TeX Gyre Pagella"; font-style:normal; font-weight:700; font-display:swap; src:url("/fonts/texgyrepagella-bold.woff2") format("woff2"); }
@font-face { font-family:"TeX Gyre Pagella"; font-style:italic; font-weight:400; font-display:swap; src:url("/fonts/texgyrepagella-italic.woff2") format("woff2"); }
@font-face { font-family:"TeX Gyre Pagella"; font-style:italic; font-weight:700; font-display:swap; src:url("/fonts/texgyrepagella-bolditalic.woff2") format("woff2"); }

/* ---- Design tokens ---- */
:root {
  /* Pagella(内嵌)排第一 → 所有人一致;失败再退到系统 Palatino / Gelasio。 */
  --font-serif: "TeX Gyre Pagella","Palatino","Palatino Linotype","Book Antiqua","Gelasio",Georgia,serif;
  --font-mono: "JetBrains Mono","Latin Modern Mono",ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;
  --surface-card: rgba(0,0,0,0.02);
  --surface-card-hover: rgba(0,0,0,0.04);
  --radius-sm: 6px; --radius-md: 8px; --radius-lg: 10px; --radius-pill: 999px;
  --dur-fast: 0.12s; --ease: ease;
}
[data-theme='dark'] { --surface-card: rgba(255,255,255,0.03); --surface-card-hover: rgba(255,255,255,0.05); }

/* ---- Base typography (compact prototype density) ---- */
body { font-family: var(--font-serif); font-size: 0.95rem; line-height: 1.55;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility; }
.container { max-width: 760px; }
h1 { font-size: 2.1rem; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.25rem; }
/* 原型整站用 roman-only 的 Palatino webfont → 标题视觉是 normal(400)，
   不是 bold。这里统一回 400，匹配原型那种细、优雅的观感。 */
h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 400; }
code, pre, .proj-year, .post-row-date, .home-proj-year, .home-key { font-family: var(--font-mono); }
body.kind-section.section-projects #content.container { max-width: 980px; }

/* ---- Site header: sticky + glassy, matching the prototype Shell ---- */
.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(8px); backdrop-filter: saturate(180%) blur(8px); }
.site-header .header { border-bottom: 0; padding: 0.85rem 1.25rem; gap: 1rem; }
.site-header .brand a { font-size: 1.05rem; font-weight: 400; letter-spacing: -0.01em; color: var(--fg); }
.site-header .brand a:hover { text-decoration: none; }
.site-header .nav { gap: 1.1rem; }
.site-header .nav-item { color: var(--muted); font-size: 0.95rem; padding-bottom: 2px;
  border-bottom: 1.5px solid transparent;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease); }
.site-header .nav-item:hover { color: var(--fg); text-decoration: none; }
.site-header .nav-item.active { color: var(--fg); border-bottom-color: var(--link); }
/* Narrow screens: tighten the nav so it fits instead of overflowing the bar. */
@media (max-width: 480px) {
  .site-header .header { padding: 0.7rem 1rem; gap: .5rem; }
  .site-header .nav { gap: .7rem; flex-wrap: wrap; justify-content: flex-end; }
  .site-header .nav-item { font-size: 0.88rem; }
}

/* ---- About / prose pages ---- */
.about .content { line-height: 1.6; }
.about .content p { margin: 0 0 0.9rem; }
.about .content ul, .about .content ol { margin: 0.2rem 0 1rem 1.25rem; padding-left: 1rem; }
.about .content li { margin: 0.1rem 0; }
.about .content li > p { margin: 0.2rem 0; }
.about .content li + li { margin-top: 0.1rem; }

/* ---- Publication "case" pages (freeform rich layout) ---- */
.pub-single.case .content { --max: 1100px; }
.pub-single.case .content > * { max-width: var(--max); margin-left: auto; margin-right: auto; }
.pub-single.case .content .wide { max-width: 1200px; }
.pub-single.case .content .full-bleed { width: 100vw; margin-left: calc(50% - 50vw); margin-right: calc(50% - 50vw); max-width: none; }
.pub-single.case .content .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.pub-single.case .content .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.pub-single.case .content .cols-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; align-items: start; }
.pub-single.case .content .col { min-width: 0; }
.pub-single.case .content .callout { border: 1px solid var(--border); background: rgba(0,0,0,0.03); padding: 1rem; border-radius: var(--radius-lg); }
.pub-single.case .content figure { margin: 1rem 0; }
.pub-single.case .content figure > img { width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
.pub-single.case .content figcaption { color: var(--muted); font-size: .9rem; margin-top: .4rem; text-align: center; }
@media (max-width: 860px) {
  .pub-single.case .content .grid-2,
  .pub-single.case .content .grid-3,
  .pub-single.case .content .cols-2 { grid-template-columns: 1fr; }
}
.pub-single .pub-cover { max-width: 1100px; margin: 0 auto 1rem; }
.pub-single .pub-cover img { width: 100%; height: auto; display: block; border-radius: var(--radius-md); }

/* ---- Author name bold in meta, status pill ---- */
.card-meta .authors strong,
.pub-single .meta strong { font-weight: 700; color: var(--fg); }
.pill { display: inline-block; padding: 2px 8px; border-radius: var(--radius-pill); border: 1px solid var(--border); font-size: .8rem; font-family: var(--font-serif); color: var(--muted); line-height: 1.6; }
.pill.pill-accent { border-color: color-mix(in oklab, var(--link) 45%, transparent); color: var(--link); font-weight: 600; }

/* ---- About-page publication cards (uniform height) ---- */
@media (min-width: 721px) {
  .cards-hz .card.hz { height: var(--pub-card-h, 200px); }
  .card.hz .card-media { height: 100%; aspect-ratio: auto; }
  .card.hz .card-body { overflow: hidden; display: grid; grid-template-rows: auto auto 1fr auto; row-gap: .25rem; align-content: start; }
  .card.hz .card-body > * { min-width: 0; }
  .card.hz .card-title { margin: 0 0 .2rem; line-height: 1.25; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .card.hz .card-meta { line-height: 1.2; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .card.hz .card-summary { line-height: 1.35; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-top: .2rem; }
  .card.hz .card-links { margin-top: .35rem; }
  .cards-hz .card.hz.no-cover { height: auto; }
  .card.hz.no-cover .card-body { display: block; }
}
.card.hz.no-cover { align-items: flex-start; }

/* ---- Home: hero ---- */
/* minmax(0,1fr) lets the text column actually shrink; without it the nowrap
   actions row forces the column wider than the viewport and pushes the photo
   column off-screen on phones. */
.home-hero { margin: 1.25rem 0 2rem; align-items: start; grid-template-columns: minmax(0, 1fr) 150px; }
.home-name { margin: 0 0 .4rem; font-size: 2.4rem; line-height: 1.15; letter-spacing: -0.01em; }
.home-role { margin: 0 0 1rem; color: var(--muted); font-size: 1.1rem; line-height: 1.45; }
.home-role .role-em { color: var(--fg); }
.home-bio { line-height: 1.65; }
.home-bio p { margin: 0 0 .7rem; }
.home-actions { display: flex; align-items: center; flex-wrap: wrap; gap: .7rem; margin-top: 1.1rem; }
.home-email { font-size: .95rem; }
.btn-outline { display: inline-flex; align-items: center; gap: .3rem; white-space: nowrap; font-size: .92rem; padding: .32rem .75rem; border: 1px solid var(--border); border-radius: var(--radius-md); color: var(--fg); }
.btn-outline:hover { border-color: var(--link); text-decoration: none; }
.home-hero .intro-media { justify-content: flex-start; }
.home-hero .intro-media img { width: 132px; height: 132px; border-radius: 50%; object-fit: cover; margin-bottom: .75rem; }
/* Mobile: keep the prototype's side-by-side hero, smaller photo. */
@media (max-width: 600px) {
  .home-hero { grid-template-columns: minmax(0, 1fr) 112px; gap: 1rem; }
  .home-hero .intro-media img { width: 104px; height: 104px; }
  .home-name { font-size: 2rem; }
}
@media (max-width: 380px) {
  .home-hero { grid-template-columns: minmax(0, 1fr) 92px; }
  .home-hero .intro-media img { width: 84px; height: 84px; }
}

/* Social icons = circular bordered chips, inline in the hero actions row */
.home-actions .intro-social { display: flex; flex-wrap: nowrap; gap: .3rem; margin-top: 0; justify-content: flex-start; }
.home-actions .social-link.icon {
  width: 32px; height: 32px; display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-pill); border: 1px solid var(--border); color: var(--muted);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.home-actions .social-link.icon svg { display: block; }
.home-actions .icon-linkedin:hover { color: #0a66c2; border-color: #0a66c2; background: #0a66c21a; }
.home-actions .icon-github:hover  { color: #24292f; border-color: #24292f; background: #24292f1a; }
.home-actions .icon-scholar:hover { color: #4285f4; border-color: #4285f4; background: #4285f41a; }
.home-actions .icon-twitter:hover { color: #1d9bf0; border-color: #1d9bf0; background: #1d9bf01a; }

/* ---- Home: section headings & "All … →" links ---- */
.home-section { margin: 2rem 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--border); padding-bottom: .4rem; margin-bottom: .9rem; }
.section-head h2 { margin: 0; font-size: 1.15rem; }
.section-head a { font-size: .9rem; color: var(--link); }
.section-head a:hover { color: var(--link); text-decoration: underline; }

/* ---- Home: selected project cards (year, title, blurb) ---- */
.home-projs { display: grid; grid-template-columns: repeat(3, 1fr); gap: .9rem; }
@media (max-width: 720px) { .home-projs { grid-template-columns: 1fr; } }
.home-proj { display: block; padding: 1rem; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface-card); color: inherit; text-decoration: none; transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease); }
.home-proj:hover { transform: translateY(-2px); background: var(--surface-card-hover); text-decoration: none; }
.home-proj-year { font-size: .78rem; color: var(--muted); }
.home-proj-title { margin: .3rem 0 .35rem; font-size: 1.05rem; }
.home-proj-blurb { margin: 0; font-size: .9rem; color: var(--muted); line-height: 1.45; }

/* ---- Home: compact rows (writing, publications, awards) ---- */
.home-rows { list-style: none; padding: 0; margin: 0; }
.home-rows li { display: flex; gap: 1rem; align-items: baseline; padding: .55rem 0; border-bottom: 1px solid var(--border); }
.home-key { font-size: .8rem; color: var(--muted); flex: 0 0 84px; }
.home-pub-title { font-size: 1.02rem; color: var(--fg); }
.home-pub-authors { color: var(--muted); font-size: .85rem; margin-top: .2rem; }
.home-badge { margin-left: .5rem; font-size: .7rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--link); border: 1px solid var(--link); border-radius: var(--radius-sm); padding: .05rem .35rem; vertical-align: 2px; }

/* ---- Projects list page ---- */
.proj-list { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.proj-list-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 720px) { .proj-list, .proj-list-3 { grid-template-columns: 1fr; } }
.proj-card { display: flex; flex-direction: column; gap: .6rem; color: inherit; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.25rem; background: var(--surface-card); transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease); }
.proj-card:hover { transform: translateY(-2px); background: var(--surface-card-hover); text-decoration: none; }
.proj-top { display: flex; align-items: baseline; justify-content: space-between; gap: .75rem; }
.proj-top h3 { margin: 0; font-size: 1.2rem; }
.proj-year { color: var(--muted); font-size: .75rem; white-space: nowrap; }
.proj-role { color: var(--link); font-size: .85rem; margin: 0; }
.proj-blurb { margin: 0; color: var(--muted); line-height: 1.5; }
.tag-row { display: flex; flex-wrap: wrap; gap: .35rem; }

/* ---- Publications list page (single-column bordered cards) ---- */
.page-sub { color: var(--muted); margin: -.3rem 0 1.4rem; font-size: 1.05rem; }
.pub-rows { display: flex; flex-direction: column; gap: .9rem; }
.pub-row { display: block; color: inherit; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: .75rem .9rem; background: var(--surface-card); transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease); }
.pub-row:hover { transform: translateY(-2px); background: var(--surface-card-hover); border-color: color-mix(in oklab, var(--link) 35%, var(--border)); text-decoration: none; }
.pub-row-title { margin: 0 0 .25rem; font-size: 1.05rem; line-height: 1.25; }
.pub-row .card-meta { color: var(--muted); font-size: .9rem; line-height: 1.3; margin: 0 0 .4rem; }
.pub-row .card-summary { margin: .4rem 0 0; color: var(--muted); font-size: .9rem; line-height: 1.35; }
.pub-row .card-links { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .5rem; }

/* ---- Writing list page ---- */
.post-rows { display: flex; flex-direction: column; }
.post-row { display: grid; grid-template-columns: 96px 1fr; gap: 1rem; align-items: start; padding: 1rem 0; border-bottom: 1px solid var(--border); }
.post-row:last-child { border-bottom: 0; }
.post-row-date { font-size: .82rem; color: var(--muted); padding-top: .3rem; }
.post-row-title { margin: 0 0 .25rem; font-size: 1.15rem; }
.post-row-sum { margin: 0 0 .4rem; color: var(--muted); }
.tag-line { display: flex; flex-wrap: wrap; gap: .6rem; font-size: .85rem; }
.tag-line a { color: var(--muted); }
.tag-line a:hover { color: var(--link); }
@media (max-width: 720px) { .post-row { grid-template-columns: 1fr; gap: .2rem; } .post-row-date { padding-top: 0; } }

/* ---- Generic intro media (non-home pages: about, etc.) ---- */
.intro-media .intro-social { display: flex; flex-wrap: wrap; gap: .4rem; }
.intro-media .social-link.icon { width: 32px; height: 32px; display: inline-flex; align-items: center; justify-content: center; border-radius: var(--radius-pill); border: 1px solid var(--border); color: var(--muted); text-decoration: none; }
.intro-media .social-link.icon svg { display: block; }
.intro-media .icon-linkedin { color: #0a66c2; border-color: #0a66c233; }
.intro-media .icon-github { color: #24292f; border-color: #24292f33; }
.intro-media .icon-scholar { color: #4285f4; border-color: #4285f433; }
.intro-media .icon-twitter { color: #1d9bf0; border-color: #1d9bf033; }

/* ---- Markdown tables in prose (lessons, posts) ---- */
.content table { width: 100%; border-collapse: collapse; margin: 1.1rem 0; font-size: .9rem; line-height: 1.45; }
.content table th, .content table td { border: 1px solid var(--border); padding: .45rem .7rem; text-align: left; vertical-align: top; }
.content table thead th { background: var(--surface-card-hover); font-weight: 600; color: var(--fg); }
.content table tbody tr:nth-child(even) { background: var(--surface-card); }
.content table code { font-size: .92em; }
/* Narrow screens: let wide tables scroll instead of overflowing the page */
@media (max-width: 720px) {
  .content table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
}

/* ---- Blockquotes / callouts in prose ---- */
.content blockquote {
  margin: 1.1rem 0;
  padding: .55rem .9rem;
  border-left: 3px solid color-mix(in oklab, var(--link) 45%, var(--border));
  background: var(--surface-card);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--muted);
}
.content blockquote > :first-child { margin-top: 0; }
.content blockquote > :last-child { margin-bottom: 0; }
.content blockquote p { margin: .3rem 0; }

/* ---- Inline code chip (not code blocks) ---- */
.content :not(pre) > code {
  background: var(--surface-card-hover);
  padding: .08em .36em;
  border-radius: var(--radius-sm);
  font-size: .9em;
}

/* ---- Claude-style code blocks (render hook .code-card) ---- */
.content .code-card {
  --code-bg: #f6f8fa; --code-bar-bg: #eceff2; --code-border: #d8dee4; --code-fg: #1f2328;
  margin: 1.15rem 0;
  border: 1px solid var(--code-border);
  border-radius: var(--radius-md);
  background: var(--code-bg);
  overflow: hidden;
}
[data-theme='dark'] .content .code-card {
  --code-bg: #0d1117; --code-bar-bg: #161b22; --code-border: #30363d; --code-fg: #e6edf3;
}
.content .code-card-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: .3rem .55rem .3rem .8rem;
  background: var(--code-bar-bg);
  border-bottom: 1px solid var(--code-border);
}
.content .code-lang {
  font-family: var(--font-mono); font-size: .7rem; letter-spacing: .05em;
  text-transform: uppercase; color: var(--muted);
}
.content .code-copy {
  font-family: var(--font-mono); font-size: .7rem; line-height: 1; cursor: pointer;
  color: var(--muted); background: transparent;
  border: 1px solid var(--code-border); border-radius: var(--radius-sm);
  padding: .22rem .5rem; transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.content .code-copy:hover { color: var(--fg); border-color: var(--link); }
.content .code-copy.copied { color: var(--link); border-color: var(--link); }
/* the highlighted <pre> sits flush inside the card, transparent so the card owns the bg */
.content .code-card pre,
.content .code-card .chroma {
  margin: 0; border: 0; border-radius: 0; padding: .8rem .9rem;
  background: transparent; color: var(--code-fg);
  overflow-x: auto; font-size: .86rem; line-height: 1.5;
}
.content .code-card code { background: transparent; padding: 0; font-size: inherit; }

/* ---- WebR run button + output ---- */
.content .code-actions { display: inline-flex; gap: .4rem; align-items: center; }
.content .code-run {
  font-family: var(--font-mono); font-size: .7rem; line-height: 1; cursor: pointer;
  color: var(--link); background: transparent;
  border: 1px solid color-mix(in oklab, var(--link) 55%, var(--code-border));
  border-radius: var(--radius-sm); padding: .22rem .55rem;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.content .code-run:hover { background: color-mix(in oklab, var(--link) 12%, transparent); }
.content .code-run:disabled { opacity: .6; cursor: progress; }
.content .code-runnable pre { outline: none; }
.content .code-runnable pre:focus { box-shadow: inset 0 0 0 2px color-mix(in oklab, var(--link) 40%, transparent); }
.content .code-output { border-top: 1px solid var(--code-border); padding: .6rem .9rem; background: color-mix(in oklab, var(--code-bar-bg) 60%, transparent); }
.content .code-output > * { margin: 0; }
.content .code-output > * + * { margin-top: .5rem; }
.content .code-output-text { font-family: var(--font-mono); font-size: .82rem; line-height: 1.5; white-space: pre-wrap; color: var(--code-fg); background: transparent; padding: 0; }
.content .code-output-status { color: var(--muted); }
.content .code-output-err { font-family: var(--font-mono); font-size: .82rem; white-space: pre-wrap; color: #cf222e; background: transparent; padding: 0; }
[data-theme='dark'] .content .code-output-err { color: #ff7b72; }
.content .code-output-plot { max-width: 100%; height: auto; display: block; background: #fff; border-radius: var(--radius-sm); }
/* gt / gtsummary tables render as self-contained HTML (always light) */
.content .code-output-html { overflow-x: auto; background: #fff; border-radius: var(--radius-sm); padding: .2rem; }
.content .code-output-html table { width: auto; font-size: .82rem; }
/* don't let the course's own markdown-table styling bleed into gt output */
.content .code-output-html table th,
.content .code-output-html table td { border: 0; }
.content .code-output-html tbody tr:nth-child(even) { background: transparent; }