/* Kejiang Li: compact identity and consistent navigation. */
.header-main { padding-top: 26px; padding-bottom: 25px; }
.site-title { font-size: clamp(32px, 3.5vw, 46px); line-height: 1.2; }
.site-description { margin-top: 8px; font-size: 16px; line-height: 1.5; color: #50616d; }
.primary-navigation-wrap { border-top: 2px solid #173c48; border-bottom: 1px solid #dbe4e7; }
#site-navigation .current-menu-item > a,
#site-navigation .current-menu-ancestor > a { color: #176b64; font-weight: 600; }
#site-navigation a:focus-visible { outline: 2px solid #176b64; outline-offset: -3px; }
@media only screen and (min-width: 60em) {
  #site-navigation { width: 100%; }
  #site-navigation > #primary-menu { justify-content: center; }
  #site-navigation .sub-menu { text-align: left; }
  #site-navigation > #primary-menu > li > a { padding: 16px 21px; }
}

/* Research-led homepage and reusable model cards. */
.kj-site { color: #233640; font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; text-align: left; }
.kj-site *, .kj-site *::before, .kj-site *::after { box-sizing: border-box; }
.kj-site p { margin: 0 0 16px; }
.kj-site h1, .kj-site h2, .kj-site h3 { color: #173c48; line-height: 1.3; text-transform: none; }
.kj-site h1 { font-size: clamp(29px, 3.2vw, 40px); margin: 0 0 16px; }
.kj-site h2 { font-size: 28px; margin: 0 0 22px; }
.kj-site h3 { font-size: 21px; margin: 0 0 14px; }
.kj-site a { color: #176b64; text-decoration: none; }
.kj-site a:hover { color: #173c48; text-decoration: underline; }
.kj-site a:focus-visible { outline: 3px solid #176b64; outline-offset: 4px; }
.kj-site-intro { padding: 6px 0 24px; max-width: 820px; }
.kj-site-intro > p { font-size: 18px; color: #50616d; }
.kj-site-intro > .kj-site-meta { font-size: 12px; text-transform: uppercase; letter-spacing: .09em; margin-bottom: 10px; }
.kj-site-section { margin: 0 0 44px; }
.kj-site-section-heading { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px 24px; margin-bottom: 22px; }
.kj-site-section-heading h2 { margin-bottom: 0; }
.kj-site-grid { display: grid; gap: 24px; }
.kj-site-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.kj-site-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.kj-site-card { margin: 0 !important; border: 1px solid #dbe4e7; border-radius: 8px; overflow: hidden; background: #fff; }
.kj-site-card-media { display: block; width: 100%; aspect-ratio: 2 / 1; object-fit: contain; margin: 0; background: #f5f8f8; }
.kj-site-card-media img { display: block; width: 100%; height: 100%; object-fit: contain; margin: 0; }
.kj-site-card-body { padding: 23px; }
.kj-site-card-body > :last-child { margin-bottom: 0; }
.kj-site-card-body p { font-size: 15px; }
.kj-site-meta { color: #50616d; font-size: 13px; line-height: 1.6; }
.kj-site-link { font-weight: 600; display: inline-block; padding: 4px 0; }
.kj-site-button { display: inline-block; padding: 11px 21px; border-radius: 5px; background: #173c48; color: white !important; font-weight: 600; text-decoration: none !important; }
.kj-site-button:hover { background: #176b64; }
.kj-site-about-grid { display: grid; grid-template-columns: minmax(230px, 1fr) minmax(0, 2fr); gap: 32px; align-items: start; }
.kj-site #contact .kj-site-about-grid { grid-template-columns: minmax(0, 2fr) minmax(230px, 1fr); }
.kj-site-paper h3 { font-size: 18px; }
.kj-site-photo { width: 100%; height: auto; display: block; border-radius: 6px; margin: 0 0 18px; }
.kj-site-about-grid figure { margin: 0 0 20px; }
.kj-site-about-grid figcaption { margin-top: 8px; color: #50616d; font-size: 12px; }
.kj-site-profile-links { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.kj-site-profile-links a { display: inline-block; padding: 5px 0; }
.kj-site #contact { padding-top: 24px; margin-top: 28px; border-top: 1px solid #dbe4e7; }
.kj-site-model-card { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 0; border: 1px solid #dbe4e7; border-radius: 8px; overflow: hidden; margin: 0 !important; }
.kj-site-model-preview { background: #eff5f4; padding: 28px; display: flex; flex-direction: column; justify-content: center; gap: 20px; }
.kj-site-model-preview h3 { font-size: 18px; }
.kj-site-route { display: flex; align-items: center; gap: 14px; padding: 14px; border: 1px solid #c7d8d7; border-radius: 6px; background: #fff; }
.kj-site-route-symbol { width: 48px; min-width: 48px; height: 48px; display: grid; place-items: center; border-radius: 50%; background: #173c48; color: white; font-size: 23px; font-weight: 700; }
.kj-site-route p { margin: 0; font-size: 14px; }
.kj-site-route strong, .kj-site-route span:not(.kj-site-route-symbol), .kj-site-route-end span { display: block; }
.kj-site-route div, .kj-site-route-end { font-size: 14px; line-height: 1.6; }
.kj-site-route-end { padding: 12px 16px; background: #dcebe8; text-align: center; color: #173c48; border-radius: 5px; }
.kj-site-model-content { padding: 30px; }
.kj-site-model-content dl { margin: 20px 0; }
.kj-site-model-content dt { font-size: 14px; font-weight: 700; color: #173c48; margin-top: 15px; }
.kj-site-model-content dd { margin: 2px 0 0; font-size: 15px; }
.kj-site-model-content .kj-site-meta { font-size: 12px; letter-spacing: .04em; }
.kj-site-note { color: #50616d; font-size: 14px; margin-top: 20px !important; }
.page-id-567 .content-area, .page-id-2978 .content-area { max-width: 1000px !important; }
.page-id-2978 .entry-header { display: none; }

/* Existing research content and bibliography: light in-page navigation. */
.kj-site-section-nav, .kj-site-research-nav, .kj-site-year-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 28px; }
.kj-site-section-nav a, .kj-site-research-nav a, .kj-site-year-nav a { display: inline-block; border: 1px solid #cbdadd; border-radius: 5px; padding: 8px 13px; background: #f5f8f8; color: #173c48; font: 600 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; text-decoration: none; }
.kj-site-section-nav a:hover, .kj-site-research-nav a:hover, .kj-site-year-nav a:hover { border-color: #176b64; background: #e8f1ef; color: #173c48; }
.kj-site-section-nav a:focus-visible, .kj-site-research-nav a:focus-visible, .kj-site-year-nav a:focus-visible { outline: 3px solid #176b64; outline-offset: 2px; }
.kj-site-research-overview { margin: 22px 0 32px; padding: 24px; border-left: 3px solid #176b64; background: #f5f8f8; }
.kj-site-research-overview h2 { margin: 0 0 16px; font-size: 24px; }
.kj-site-research-overview h3 { font-size: 18px; margin: 0 0 8px; }
.kj-site-research-overview p { margin: 0 0 14px; font-size: 16px; }
.kj-site-year-heading { padding: 18px 0 12px; margin-top: 32px; border-top: 1px solid #dbe4e7; color: #173c48; scroll-margin-top: 24px; }
.kj-site-year-heading:target { background: #eff5f4; }
#low-carbon-ironmaking, #multiscale-modeling { scroll-margin-top: 24px; }
@media (max-width: 700px) {
  .kj-site-grid-2, .kj-site-grid-3, .kj-site-about-grid, .kj-site #contact .kj-site-about-grid, .kj-site-model-card { grid-template-columns: minmax(0, 1fr); }
  .kj-site h2 { font-size: 25px; }
  .kj-site-section { margin-bottom: 34px; }
  .kj-site-card-body, .kj-site-model-preview, .kj-site-model-content { padding: 22px; }
  .kj-site-photo { max-width: 420px; }
  .kj-site-year-nav { gap: 7px; }
}
@media (prefers-reduced-motion: no-preference) {
  .kj-site a, .kj-site-year-nav a, .kj-site-research-nav a { transition: background-color .15s, color .15s, border-color .15s; }
}