/* yiyang-zeng.com — site styles */

@import url("https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,300;0,6..72,400;0,6..72,500;0,6..72,600;1,6..72,400;1,6..72,600&family=JetBrains+Mono:wght@400;500&display=swap");

:root {
  --yz-paper: #fdfcf8;
  --yz-rule: #e6dfcc;
  --yz-ink: #1a1611;
  --yz-ink-2: #3a342a;
  --yz-mute: #7a7062;
  --yz-accent: #b04a2f;
  --yz-accent-soft: #c8b9a0;
  --yz-kw-navy: #6a8499;
  --yz-serif: "Newsreader", Georgia, serif;
  --yz-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  --yz-measure: 68ch;
}

/* ----- Squarespace shell ----- */
body {
  background: var(--yz-paper) !important;
  color: var(--yz-ink);
  font-family: var(--yz-serif);
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 600px at 90% -5%, rgba(176, 74, 47, 0.035), transparent 55%),
    radial-gradient(700px 500px at -5% 105%, rgba(26, 22, 17, 0.04), transparent 55%);
  z-index: 0;
}

#siteWrapper,
.site-wrapper,
.content-wrapper,
.page-section,
.sqs-layout {
  background: transparent !important;
}

.page-section:has(.yz-site) .content-wrapper > h1,
.page-section:has(.yz-site) .sqs-block-html h1,
.page-section:has(.yz-site) .sqs-block-markdown h1 {
  display: none !important;
}

.sqs-block-code .sqs-block-content {
  padding-left: 0 !important;
  padding-right: 0 !important;
}

body:has(.yz-site) #header,
body:has(.yz-site) .header,
body:has(.yz-site) .Mobile-bar {
  display: none !important;
}

body:has(.yz-site) .page-section:first-child {
  padding-top: 0 !important;
}

/* ----- Site shell ----- */
.yz-site {
  position: relative;
  z-index: 1;
  color: var(--yz-ink);
  font-family: var(--yz-serif);
  overflow-x: clip;
}

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

.yz-site a {
  color: var(--yz-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--yz-accent-soft);
  transition: color 0.15s, border-color 0.15s;
}

.yz-site a:hover {
  color: var(--yz-accent);
  border-bottom-color: var(--yz-accent);
}

/* Masthead (Daniel-style, compact) */
.yz-masthead {
  border-bottom: 1px solid var(--yz-rule);
  padding: 16px 20px 18px;
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-family: var(--yz-mono);
  font-size: 12.5px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--yz-ink-2);
}

.yz-masthead-left {
  display: flex;
  gap: 10px;
  align-items: baseline;
  flex-wrap: wrap;
}

.yz-masthead-name {
  font-weight: 500;
  border-bottom: none !important;
}

.yz-masthead-name:hover {
  color: var(--yz-accent);
}

.yz-masthead-dot {
  color: var(--yz-accent);
}

.yz-masthead-tag {
  color: var(--yz-mute);
  text-transform: none;
  letter-spacing: 0.02em;
  font-size: 13px;
}

.yz-masthead-nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.yz-masthead-nav a {
  border-bottom: none;
  color: var(--yz-ink-2);
  padding: 4px 0;
}

.yz-masthead-nav a:hover,
.yz-masthead-nav a[aria-current="page"] {
  color: var(--yz-accent);
}

.yz-masthead-nav a[aria-current="page"] {
  border-bottom: 1px solid var(--yz-accent);
}

/* Theme illustration band */
.yz-theme-band {
  overflow-x: auto;
  overflow-y: visible;
  -webkit-overflow-scrolling: touch;
}

.yz-theme-band svg {
  display: block;
  width: 100%;
  height: auto;
  opacity: 0.92;
  overflow: visible;
}

/* Layout: sidebar + main */
.yz-layout {
  max-width: 1120px;
  margin: 0 auto;
  padding: 40px 20px 64px;
  display: grid;
  grid-template-columns: minmax(220px, 260px) 1fr;
  gap: 48px;
  align-items: start;
}

.yz-layout--about {
  padding: 12px 20px 64px;
  grid-template-columns: 1fr minmax(220px, 260px);
  grid-template-areas:
    "theme sidebar"
    "main sidebar";
  column-gap: 48px;
  row-gap: 0;
}

.yz-layout--about .yz-theme-band {
  grid-area: theme;
  background: var(--yz-paper);
  padding: 48px 0 42px;
  overflow-x: hidden;
  overflow-y: visible;
}

.yz-layout--about .yz-theme-band svg {
  display: block;
  width: calc((100% + 48px) / 1.26);
  min-width: 0;
  max-width: none;
  height: auto;
  max-height: calc(136px / 1.26);
  margin: 0 0 0 calc(-40 / 1120 * (100% + 48px));
  opacity: 0.92;
  transform: scale(1.26);
  transform-origin: top left;
}

.yz-layout--about .yz-main {
  grid-area: main;
  padding-top: 24px;
  max-width: 76ch;
}

.yz-layout--about .yz-intro {
  font-size: 19px;
  line-height: 1.56;
  max-width: 68ch;
}

.yz-layout--about .yz-bio {
  font-size: 19px;
  line-height: 1.58;
  max-width: 76ch;
}

.yz-layout--about .yz-sidebar {
  grid-area: sidebar;
  padding-top: 58px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  align-self: start;
  --yz-sidebar-block: 248px;
}

.yz-layout--about .yz-portrait {
  width: var(--yz-sidebar-block);
  aspect-ratio: auto;
  height: auto;
  margin-left: 0;
}

.yz-layout--about .yz-portrait img {
  width: 220px;
  height: 220px;
}

.yz-layout--about .yz-name {
  width: var(--yz-sidebar-block);
  font-size: 32px;
  margin: 18px 0 10px;
  text-align: left;
}

.yz-layout--about .yz-affil {
  width: var(--yz-sidebar-block);
  max-width: none;
  margin-left: 0;
  font-size: 16px;
  line-height: 1.5;
  text-align: left;
}

.yz-layout--about .yz-contact {
  width: var(--yz-sidebar-block);
  margin-left: 0;
  grid-template-columns: max-content 1fr;
  column-gap: 12px;
  font-size: 15px;
}

.yz-layout--about .yz-contact dt {
  text-align: left;
  font-size: 11px;
}

.yz-layout--about .yz-contact dd {
  text-align: left;
  font-size: 13.5px;
  letter-spacing: -0.01em;
}

.yz-layout--about .yz-contact-email {
  white-space: normal;
}

/* Inner pages: masthead + centered content only */
.yz-layout--solo {
  display: block;
  padding-top: 32px;
}

.yz-layout--solo:has(.yz-subsection-first) {
  padding-top: 22px;
}

.yz-layout--solo .yz-main {
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

.yz-layout--solo .yz-coauthor {
  white-space: nowrap;
}

.yz-layout--solo .yz-work-title {
  font-size: 18px;
  margin-bottom: 4px;
}

.yz-layout--solo .yz-work-meta {
  font-size: 17px;
  margin-bottom: 4px;
}

.yz-layout--solo .yz-work-desc,
.yz-layout--solo .yz-work-links {
  font-size: 17px;
  line-height: 1.5;
}

.yz-layout--solo .yz-work-desc {
  margin-bottom: 4px;
}

.yz-layout--solo .yz-awards {
  font-size: 15px;
  margin: 0 0 4px;
  line-height: 1.45;
}

.yz-layout--solo .yz-awards li {
  margin-bottom: 2px;
}

.yz-layout--solo .yz-subsection {
  font-size: 13px;
  letter-spacing: 0.08em;
  margin: 12px 0 4px;
}

.yz-layout--solo .yz-subsection-first {
  margin-top: 0;
}

.yz-layout--solo .yz-work {
  margin-bottom: 10px;
  padding-bottom: 10px;
}

/* Teaching: divider after GT course only, not between UCLA courses */
.yz-subsection:not(.yz-subsection-first) ~ .yz-work {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 18px;
}

.yz-subsection:not(.yz-subsection-first) ~ .yz-work:last-of-type {
  margin-bottom: 0;
}

/* Sidebar */
.yz-sidebar {
  position: sticky;
  top: 16px;
}

.yz-portrait {
  width: 200px;
  max-width: 100%;
  aspect-ratio: 1 / 1;
}

.yz-portrait img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  display: block;
  object-fit: cover;
}

.yz-name {
  font-family: var(--yz-serif);
  font-weight: 500;
  font-size: 28px;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 20px 0 8px;
}

.yz-affil {
  font-size: 15px;
  line-height: 1.5;
  color: var(--yz-ink-2);
  max-width: 26ch;
  margin: 0;
}

.yz-affil a {
  border-bottom: none !important;
  color: inherit;
}

.yz-affil a:hover {
  color: var(--yz-accent);
  border-bottom: none !important;
}

.yz-contact {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--yz-rule);
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 5px 12px;
  font-size: 14px;
}

.yz-contact dt {
  font-family: var(--yz-mono);
  font-size: 10px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--yz-mute);
  padding-top: 2px;
}

.yz-contact dd {
  margin: 0;
  line-height: 1.45;
}

.yz-contact-email {
  font-size: 12.5px;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.yz-contact-email a {
  border-bottom: none;
}

.yz-contact dd a:hover {
  border-bottom: 1px solid var(--yz-accent);
}

/* Main column */
.yz-main {
  min-width: 0;
  max-width: var(--yz-measure);
}

.yz-intro {
  font-size: 19px;
  line-height: 1.58;
  color: var(--yz-ink-2);
  margin: 0 0 18px;
}

.yz-intro .yz-kw {
  color: var(--yz-accent);
  font-weight: inherit;
}

.yz-intro .yz-kw-light {
  color: var(--yz-kw-navy);
  font-weight: inherit;
}

.yz-bio {
  font-size: 19px;
  line-height: 1.58;
  color: var(--yz-ink-2);
  margin: 0 0 14px;
}

.yz-section {
  font-family: var(--yz-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--yz-ink);
  margin: 0 0 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--yz-ink);
}

.yz-section-first {
  margin-top: 0;
}

.yz-subsection {
  font-family: var(--yz-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--yz-mute);
  font-weight: 500;
  margin: 28px 0 12px;
}

.yz-subsection:first-of-type {
  margin-top: 8px;
}

.yz-subsection-first {
  margin-top: 0;
}

/* Jennifer-style work entries */
.yz-work {
  margin-bottom: 26px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--yz-rule);
}

.yz-work:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.yz-work-title {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.4;
}

.yz-work-title strong {
  font-weight: 600;
}

.yz-coauthor {
  font-size: 0.88em;
  font-weight: 400;
  color: var(--yz-mute);
  white-space: nowrap;
}

.yz-coauthor a {
  color: var(--yz-mute);
  border-bottom: 1px solid var(--yz-rule);
}

.yz-coauthor a:hover {
  color: var(--yz-accent);
  border-bottom-color: var(--yz-accent);
}

.yz-work-first {
  margin-top: 0;
}

.yz-awards {
  margin: 0 0 10px;
  padding-left: 1.15em;
  font-size: 14px;
  line-height: 1.55;
  color: var(--yz-mute);
}

.yz-awards li {
  margin-bottom: 5px;
}

.yz-awards li:last-child {
  margin-bottom: 0;
}

.yz-work-meta {
  margin: 0 0 6px;
  font-family: var(--yz-serif);
  font-size: 16px;
  line-height: 1.5;
  color: var(--yz-ink-2);
}

.yz-work-meta em strong,
.yz-work-meta strong em {
  font-family: inherit;
  font-style: italic;
  font-weight: 600;
  font-synthesis: none;
  color: var(--yz-ink);
}

.yz-work-detail {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--yz-mute);
}

.yz-work-desc {
  margin: 0 0 8px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--yz-ink-2);
}

.yz-work-links {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
}

.yz-work-links a {
  border-bottom: none;
  text-decoration: underline;
  text-decoration-color: var(--yz-accent-soft);
  text-underline-offset: 2px;
}

.yz-bracketed-link {
  white-space: nowrap;
}

.yz-work-links a:hover {
  text-decoration-color: var(--yz-accent);
}

/* CV page */
.yz-cv-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.yz-cv-header .yz-cv-lead {
  margin: 0;
}

.yz-cv-header .yz-work-links {
  margin: 0;
}

.yz-cv-lead {
  font-size: 17px;
  color: var(--yz-ink-2);
}

.yz-cv-download {
  display: inline-block;
  font-family: var(--yz-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 10px 16px;
  border: 1px solid var(--yz-ink);
  border-bottom: 1px solid var(--yz-ink) !important;
  text-decoration: none !important;
}

.yz-cv-download:hover {
  background: var(--yz-ink);
  color: var(--yz-paper) !important;
}

/* ----- Mobile ----- */
@media (max-width: 820px) {
  .yz-masthead {
    padding: 12px 16px 10px;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    font-size: 12px;
  }

  .yz-masthead-tag {
    font-size: 13px;
  }

  .yz-masthead-nav {
    gap: 12px 16px;
  }

  .yz-masthead-nav a {
    padding: 6px 0;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  .yz-layout {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 28px 16px 48px;
  }

  .yz-layout--solo {
    padding: 24px 16px 40px;
  }

  .yz-layout--solo:has(.yz-subsection-first) {
    padding-top: 18px;
  }

  .yz-layout--solo .yz-work {
    margin-bottom: 8px;
    padding-bottom: 8px;
  }

  .yz-layout--solo .yz-subsection {
    margin: 10px 0 4px;
  }

  .yz-layout--solo .yz-main {
    max-width: none;
  }

  .yz-layout--about {
    grid-template-columns: 1fr;
    grid-template-areas:
      "theme"
      "main"
      "sidebar";
    padding: 8px 16px 48px;
  }

  .yz-layout--about .yz-theme-band {
    padding: 18px 0 22px;
    margin: 0;
    overflow: visible;
  }

  .yz-layout--about .yz-theme-band svg {
    width: 100%;
    max-width: 100%;
    max-height: none;
    margin: 0 auto;
    transform: none;
    transform-origin: top center;
  }

  .yz-layout--about .yz-sidebar,
  .yz-layout--about .yz-main {
    padding-top: 0;
  }

  .yz-coauthor {
    white-space: normal;
    display: inline;
  }

  .yz-sidebar {
    position: static;
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 16px;
    align-items: start;
  }

  .yz-portrait {
    width: 100px;
    margin: 0;
  }

  .yz-name {
    font-size: 24px;
    margin: 0 0 6px;
  }

  .yz-affil {
    max-width: none;
    font-size: 14px;
  }

  .yz-contact {
    grid-column: 1 / -1;
    margin-top: 4px;
  }

  .yz-contact-email {
    white-space: normal;
    font-size: 13px;
  }

  .yz-main {
    max-width: none;
  }

  .yz-work-title {
    font-size: 16px;
  }

  /* Each bracket group must be one flex item (a or .yz-bracketed-link). */
  .yz-work-links {
    display: flex;
    flex-wrap: wrap;
    column-gap: 0.45em;
    row-gap: 0.35em;
  }

  .yz-work-links > a,
  .yz-work-links > .yz-bracketed-link {
    white-space: nowrap;
  }

  .yz-layout--about .yz-sidebar {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    padding-top: 0;
    --yz-sidebar-block: 100%;
  }

  .yz-layout--about .yz-portrait {
    width: var(--yz-sidebar-block);
    aspect-ratio: auto;
    height: auto;
  }

  .yz-layout--about .yz-portrait img {
    width: min(280px, 82vw);
    height: min(280px, 82vw);
  }

  .yz-layout--about .yz-name {
    width: 100%;
    font-size: 34px;
    margin: 16px 0 8px;
  }

  .yz-layout--about .yz-affil {
    width: 100%;
    font-size: 19px;
    line-height: 1.55;
  }

  .yz-layout--about .yz-intro,
  .yz-layout--about .yz-bio {
    font-size: 18.5px;
    line-height: 1.6;
  }

  .yz-layout--about .yz-contact {
    width: 100%;
    grid-column: auto;
    font-size: 17px;
  }

  .yz-layout--about .yz-contact dt {
    font-size: 13px;
    text-align: left;
  }

  .yz-layout--about .yz-contact dd {
    font-size: 17px;
    text-align: left;
  }

  .yz-cv-header {
    gap: 12px;
  }

  .yz-cv-download {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
  }
}

@media (max-width: 420px) {
  .yz-masthead-tag {
    display: block;
    margin-top: 2px;
    padding-left: 0;
  }

  .yz-masthead-left {
    flex-direction: column;
    gap: 2px;
  }

  .yz-masthead-dot {
    display: none;
  }

  .yz-layout--about .yz-intro,
  .yz-layout--about .yz-bio {
    font-size: 18px;
  }
}