@import url("https://fonts.googleapis.com/css2?family=Source+Sans+3:wght@300;400;500;600;700&display=swap");

:root {
  --text: #111111;
  --muted: #555555;
  --link: #598be7;
  --link-hover: #8dafed;
  --paper: #ffffff;
  --rule: #ececec;
  --soft: #f6f8fb;
  --ink-soft: #2f3b4a;
  --panel: #ffffff;
  --shadow: rgba(20, 30, 50, 0.08);
  --lane-rule: #dfe6f3;
  --async-soft: #f8f8f2;
  --async-rule: #e6e1c9;
  --grid-rule: #e8edf5;
  --bar-dark: #222222;
  --toggle-track: #f6f8fb;
  --toggle-mark: #111111;
}

:root[data-theme="dark"] {
  --text: #eeeeee;
  --muted: #a8adb7;
  --link: #8dafed;
  --link-hover: #b8ccf6;
  --paper: #111317;
  --rule: #2b3038;
  --soft: #191d24;
  --ink-soft: #d8deea;
  --panel: #151922;
  --shadow: rgba(0, 0, 0, 0.34);
  --lane-rule: #343b47;
  --async-soft: #20241f;
  --async-rule: #3a3d2b;
  --grid-rule: #2a313b;
  --bar-dark: #eeeeee;
  --toggle-track: #1b2028;
  --toggle-mark: #f2f5f8;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: "Source Sans 3", "Source Sans Pro", Lato, Verdana, Helvetica, sans-serif;
  font-size: 15px;
  font-weight: 400;
  line-height: 1.42;
  -webkit-font-smoothing: antialiased;
}

.site-nav {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 18px 20px 0;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 28px;
}

.site-brand {
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
}

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

.site-nav-link {
  color: var(--link);
  font-size: 15px;
}

.site-dropdown {
  position: relative;
  text-align: left;
}

.site-dropdown summary {
  cursor: pointer;
  color: var(--link);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  list-style: none;
}

.site-dropdown summary::-webkit-details-marker {
  display: none;
}

.site-dropdown summary::after {
  content: "";
  width: 6px;
  height: 6px;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  color: var(--muted);
  transform: rotate(45deg) translateY(-1px);
  transition: transform 140ms ease;
}

.site-dropdown[open] summary::after {
  transform: rotate(225deg) translate(-1px, -1px);
}

.dropdown-panel {
  min-width: 220px;
  margin-top: 7px;
  padding: 9px 11px;
  border: 1px solid var(--rule);
  background: var(--panel);
  box-shadow: 0 12px 24px var(--shadow);
  display: grid;
  gap: 5px;
  position: static;
  z-index: 10;
  text-align: left;
}

.theme-toggle {
  width: 30px;
  height: 30px;
  margin-left: auto;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--toggle-track);
  color: var(--toggle-mark);
  cursor: pointer;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  border-color: var(--link);
}

.theme-toggle-icon {
  width: 16px;
  height: 16px;
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

:root[data-theme="dark"] .theme-toggle-icon {
  transform: rotate(24deg);
}

.dropdown-panel a {
  display: block;
  line-height: 1.35;
}

a,
a:focus {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  color: var(--link-hover);
}

p {
  margin: 0 0 10px;
}

ol,
ul {
  margin-top: 0;
}

code {
  font-family: "Source Code Pro", Menlo, Monaco, Consolas, monospace;
}

small {
  color: var(--muted);
  font-size: 0.78em;
}

.page {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px 0 48px;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(130px, 1fr);
  gap: 20px;
  align-items: center;
  padding: 0 20px 18px;
}

.intro-copy {
  min-width: 0;
  text-align: center;
}

h1 {
  margin: 0;
  font-size: 40px;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.1;
}

.pronunciation {
  margin: 2px 0 18px;
  color: var(--muted);
}

.subtitle-line {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0 7px;
  margin: 4px 0 18px;
  color: var(--muted);
}

.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0 7px;
  margin-top: 12px;
}

.photo-wrap {
  display: flex;
  justify-content: center;
}

.profile-photo {
  width: 100%;
  max-width: 165px;
  aspect-ratio: 1;
  border-radius: 50%;
  display: block;
}

.section {
  padding: 18px 20px 0;
}

.section h2 {
  margin: 0 0 6px;
  font-size: 36px;
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: 0;
}

.compact-list {
  list-style: none;
  margin: 0;
  padding: 0 20px;
}

.compact-list li {
  margin-bottom: 5px;
}

.item-title,
.entry h3 {
  font-size: 21px;
  font-weight: 400;
}

.entry {
  padding: 0 20px 12px;
}

.entry h3 {
  margin: 0;
  line-height: 1.25;
}

.entry p {
  margin-left: 10px;
  margin-right: 10px;
}

.entry-meta {
  color: var(--text);
  font-weight: 600;
}

.entry-links {
  margin-bottom: 0;
}

.two-level article {
  padding: 0 20px 13px;
}

.two-level h3 {
  margin: 0;
  padding: 5px 0;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.3;
}

.two-level p {
  margin: 0 20px;
  padding: 2px 0;
}

.role,
.date {
  color: var(--muted);
  font-weight: 400;
}

.simple-header,
.article-header {
  padding: 0 20px 16px;
  text-align: center;
}

.simple-header h1,
.article-header h1 {
  margin-top: 20px;
}

.simple-header p,
.article-header p {
  max-width: 660px;
  margin-left: auto;
  margin-right: auto;
}

.blog-preview h3 a {
  color: var(--text);
}

.article-page {
  max-width: 900px;
}

.article-header {
  padding-top: 6px;
}

.article-meta {
  color: var(--muted);
}

.article-header h1 {
  max-width: 680px;
  margin: 20px auto 0;
  margin-right: auto;
  font-size: 38px;
  line-height: 1.08;
  overflow-wrap: break-word;
}

.article-actions {
  display: flex;
  justify-content: center;
  gap: 0 7px;
  margin: 6px auto 0;
  color: var(--muted);
}

.lede {
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.52;
}

.article-content {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 20px 64px;
}

.article-content section {
  padding-top: 22px;
}

.article-content h2 {
  margin: 0 0 8px;
  font-size: 30px;
  font-weight: 300;
  line-height: 1.2;
}

.article-content h3 {
  margin: 18px 0 6px;
  font-size: 20px;
  font-weight: 500;
}

.article-content p,
.article-content li {
  font-size: 16px;
  line-height: 1.58;
}

.article-content li {
  margin-bottom: 4px;
}

.callout {
  margin: 18px 0 6px;
  padding: 14px 16px;
  border-left: 3px solid var(--link);
  background: var(--soft);
  color: var(--ink-soft);
  line-height: 1.55;
}

.figure {
  margin: 22px 0 18px;
}

.figure figcaption {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
  margin-top: 8px;
  text-align: center;
}

.pipeline-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.pipeline {
  border: 1px solid var(--rule);
  padding: 14px;
  background: var(--panel);
}

.pipeline h3 {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 600;
}

.pipeline p {
  color: var(--muted);
  font-size: 13px;
  margin: 10px 0 0;
}

.lane {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.lane span {
  min-height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--lane-rule);
  background: var(--soft);
  color: var(--ink-soft);
  font-size: 13px;
}

.async .lane span:nth-child(n + 5) {
  background: var(--async-soft);
  border-color: var(--async-rule);
}

.two-row {
  grid-template-columns: repeat(4, 1fr);
}

.equation {
  overflow-x: auto;
  margin: 16px 0;
  padding: 13px 15px;
  border: 1px solid var(--rule);
  background: var(--soft);
  font-size: 14px;
  line-height: 1.55;
  text-align: center;
  white-space: normal;
}

.math {
  font-family: "Source Code Pro", Menlo, Monaco, Consolas, monospace;
  font-size: 0.95em;
}

.lag-chart {
  height: 230px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  align-items: end;
  padding: 18px 18px 28px;
  border: 1px solid var(--rule);
  background:
    linear-gradient(to top, var(--grid-rule) 1px, transparent 1px) 0 0 / 100% 25%,
    var(--panel);
}

.bar-set {
  height: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  align-items: end;
  position: relative;
}

.bar {
  display: block;
  min-height: 14px;
}

.k4 {
  background: #9bb9f1;
}

.kinf {
  background: var(--bar-dark);
}

.bar-label {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -22px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.method-table {
  width: 100%;
  margin: 16px 0 18px;
  border-collapse: collapse;
  font-size: 14px;
}

.method-table th,
.method-table td {
  border-top: 1px solid var(--rule);
  padding: 9px 8px;
  text-align: left;
  vertical-align: top;
}

.method-table th {
  font-weight: 600;
}

.method-table tr:last-child td {
  border-bottom: 1px solid var(--rule);
}

.ess-figure {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  padding: 18px;
  border: 1px solid var(--rule);
  background: var(--panel);
}

.sparkline {
  min-height: 150px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
  align-items: end;
  padding: 12px;
  background: var(--soft);
}

.sparkline::before {
  align-self: start;
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 13px;
}

.sparkline span {
  display: block;
  background: var(--link);
}

.sparkline.decline::before {
  content: "ESS";
}

.sparkline.spike::before {
  content: "KL / gradient";
}

.sparkline.decline span:nth-child(2) { height: 92%; }
.sparkline.decline span:nth-child(3) { height: 74%; }
.sparkline.decline span:nth-child(4) { height: 58%; }
.sparkline.decline span:nth-child(5) { height: 42%; }
.sparkline.decline span:nth-child(6) { height: 24%; }
.sparkline.decline span:nth-child(7) { height: 14%; }

.sparkline.spike span {
  background: var(--bar-dark);
}

.sparkline.spike span:nth-child(2) { height: 12%; }
.sparkline.spike span:nth-child(3) { height: 16%; }
.sparkline.spike span:nth-child(4) { height: 20%; }
.sparkline.spike span:nth-child(5) { height: 35%; }
.sparkline.spike span:nth-child(6) { height: 67%; }
.sparkline.spike span:nth-child(7) { height: 94%; }

.citation {
  overflow-x: auto;
  margin: 14px 0 0;
  padding: 14px;
  border: 1px solid var(--rule);
  background: var(--soft);
  font-size: 13px;
  line-height: 1.45;
}

.article-figure {
  margin: 20px 0 18px;
}

.article-figure img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--rule);
  background: var(--panel);
}

.article-figure img[src$=".svg"] {
  border: 0;
}

.article-figure.wide {
  margin-left: 0;
  margin-right: 0;
}

.article-figure figcaption {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.42;
  margin-top: 8px;
  text-align: center;
}

.figure-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-items: start;
  margin: 18px 0;
}

.figure-grid .article-figure {
  margin: 0;
}

@media (max-width: 640px) {
  .page {
    padding-top: 14px;
  }

  .intro {
    grid-template-columns: 1fr;
    gap: 14px;
    padding-bottom: 10px;
  }

  .photo-wrap {
    order: -1;
  }

  .profile-photo {
    max-width: 132px;
  }

  h1 {
    font-size: 34px;
  }

  .section h2 {
    font-size: 30px;
  }

  .compact-list,
  .entry,
  .two-level article {
    padding-left: 8px;
    padding-right: 8px;
  }

  .entry p,
  .two-level p {
    margin-left: 10px;
    margin-right: 10px;
  }

  .article-header h1 {
    font-size: 30px;
  }

  .lede {
    font-size: 16px;
  }

  .article-content {
    padding-left: 16px;
    padding-right: 16px;
  }

  .article-content h2 {
    font-size: 27px;
  }

  .pipeline-compare,
  .ess-figure,
  .figure-grid {
    grid-template-columns: 1fr;
  }

  .article-figure.wide {
    margin-left: 0;
    margin-right: 0;
  }

  .method-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}