:root {
  --bg: #fbfaf7;
  /* --paper: #ffffff; */
  --paper: #fbfaf7;
  --ink: #202020;
  --muted: #5f6362;
  --line: #ddd7ca;
  --accent: #990000;
  --accent-dark: #6f0000;
  --gold: #c79a2b;
  --blue: #326d8c;
  --green: #4d7c54;
  --shadow: 0 18px 50px rgba(46, 40, 28, 0.12);
  --drawer-width: min(430px, 34vw);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
}

main,
.site-header,
.footer {
  transition: margin-right 220ms ease;
}

body.drawer-open main,
body.drawer-open .site-header,
body.drawer-open .footer {
  margin-right: var(--drawer-width);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 5vw, 64px);
  background: rgba(251, 250, 247, 0.92);
  border-bottom: 1px solid rgba(153, 0, 0, 0.12);
  backdrop-filter: blur(14px);
}

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

.nav-links {
  display: flex;
  gap: clamp(14px, 3vw, 30px);
  font-size: 0.95rem;
}

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

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--accent);
}

.section-band {
  padding: clamp(20px, 2.8vw, 34px) clamp(18px, 5vw, 64px);
  scroll-margin-top: 70px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(190px, 0.52fr) minmax(320px, 1fr);
  gap: clamp(18px, 3vw, 42px);
  align-items: center;
  min-height: auto;
  padding-top: clamp(18px, 2.5vw, 30px);
}

.hero-media {
  position: relative;
  overflow: hidden;
  justify-self: center;
  width: min(100%, 340px);
  border-radius: 8px;
  box-shadow: var(--shadow);
  aspect-ratio: 4 / 5;
  background: #e8e1d2;
}

.hero-media.is-fallback {
  display: grid;
  place-items: center;
  background:
    linear-gradient(135deg, rgba(153, 0, 0, 0.12), rgba(199, 154, 43, 0.18)),
    #e8e1d2;
}

.hero-media.is-fallback::before {
  content: "ZA";
  display: grid;
  width: 34%;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgba(153, 0, 0, 0.24);
  border-radius: 50%;
  color: var(--accent-dark);
  font-size: clamp(2.2rem, 7vw, 4.6rem);
  font-weight: 700;
  background: rgba(255, 255, 255, 0.46);
}

.hero-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow,
.panel-kicker {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(1.6rem, 2.35vw, 2.05rem);
  line-height: 1;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: clamp(1.08rem, 1.55vw, 1.38rem);
  line-height: 1.15;
  letter-spacing: 0;
}

h3 {
  margin: 16px 0 6px;
  font-size: 1rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.hero-copy p {
  margin: 0 0 12px;
  color: #303030;
  font-size: 1.02rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.text-button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 9px 14px;
  border: 1px solid var(--accent);
  border-radius: 4px;
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration: none;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.text-button:hover,
.text-button:focus-visible {
  background: var(--accent);
  color: #fff;
  transform: translateY(-1px);
}

.research-section {
  background: #fffdf9;
}

.section-heading {
  position: relative;
  z-index: 12;
  max-width: 1120px;
  margin: 0 auto 2px;
}

.research-hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.3;
}

.research-hint button {
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.research-hint button:hover,
.research-hint button:focus-visible {
  color: var(--accent);
  outline: none;
}

.agenda-layout {
  max-width: 760px;
  margin: 0 auto;
}

.venn-wrap {
  position: relative;
  z-index: 1;
  width: min(100%, 720px);
  aspect-ratio: 1.42 / 1;
  margin: -78px auto 0;
  isolation: isolate;
}

.venn-circle {
  position: absolute;
  width: 34%;
  aspect-ratio: 1;
  border: 2px solid currentColor;
  border-radius: 50%;
  background: color-mix(in srgb, currentColor 17%, transparent);
  color: var(--blue);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  display: grid;
  place-items: center;
  padding: 10px;
  font-size: clamp(0.86rem, 1.18vw, 1rem);
  text-align: center;
  transition: background 180ms ease, box-shadow 180ms ease, transform 180ms ease, opacity 180ms ease;
}

.venn-circle span {
  display: block;
  width: max-content;
  max-width: 64%;
  color: #1a2427;
  line-height: 1.16;
  pointer-events: none;
}

.circle-top {
  left: 33%;
  top: 18%;
  color: var(--gold);
  z-index: 4;
}

.circle-top span {
  max-width: 58%;
  transform: translateY(-35%);
}

.circle-left {
  left: 20%;
  top: 43%;
  color: var(--blue);
  z-index: 3;
}

.circle-left span {
  justify-self: start;
  transform: translateX(10%);
}

.circle-right {
  right: 20%;
  top: 43%;
  color: var(--green);
  z-index: 2;
}

.circle-right span {
  justify-self: end;
  transform: translateX(-10%);
}

.venn-circle:hover,
.venn-circle:focus-visible,
.venn-circle.is-active {
  background: color-mix(in srgb, currentColor 28%, white 32%);
  box-shadow: 0 16px 36px rgba(55, 47, 30, 0.17);
  outline: none;
  transform: translateY(-4px);
}

.research-section.has-active-topic .venn-circle:not(.is-active) {
  opacity: 0.86;
}

.paper-groups {
  position: absolute;
  inset: 0;
  z-index: 8;
  pointer-events: none;
}

.paper-set {
  position: absolute;
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.paper-set li {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--ink);
  cursor: pointer;
  font-size: clamp(0.74rem, 0.96vw, 0.88rem);
  font-weight: 700;
  line-height: 1.1;
  outline-offset: 3px;
  pointer-events: auto;
  white-space: nowrap;
}

.paper-set li::before {
  content: "";
  display: block;
  width: 5px;
  height: 5px;
  flex: 0 0 5px;
  border-radius: 50%;
  background: currentColor;
}

.paper-badge {
  display: inline;
  color: #c79a2b;
  font-size: 1em;
  font-weight: 700;
}

.paper-set-interface {
  left: 70%;
  top: 21%;
  color: var(--gold);
}

.paper-set-ml {
  right: 84%;
  top: 64%;
  color: var(--blue);
}

.paper-set-environment {
  left: 81.5%;
  top: 62%;
  color: var(--green);
}

.paper-set-environment li {
  max-width: 150px;
  white-space: nowrap;
}

.paper-connector {
  position: fixed;
  inset: 0;
  z-index: 80;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
}

.paper-connector path {
  fill: none;
  stroke: var(--accent);
  stroke-dasharray: 7 7;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
  opacity: 0;
  transition: opacity 120ms ease;
}

.paper-connector.is-visible path {
  opacity: 0.9;
}

.details-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 44px);
}

.detail-block {
  max-width: 680px;
}

.detail-block p {
  margin: 0 0 6px;
}

.detail-block ul,
.timeline {
  margin: 0;
  padding-left: 20px;
}

.detail-block li {
  margin: 0 0 5px;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(180px, 0.35fr) minmax(320px, 1fr);
  gap: clamp(20px, 3vw, 44px);
  background: #f5f1e9;
}

.timeline {
  display: grid;
  gap: 8px;
  padding-left: 0;
  list-style: none;
}

.timeline li {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 14px;
}

.timeline time {
  color: var(--accent);
  font-weight: 700;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px clamp(18px, 5vw, 64px);
  color: var(--muted);
}

.footer p {
  margin: 0;
}

.publications-drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 60;
  width: var(--drawer-width);
  min-width: 360px;
  height: 100dvh;
  border-left: 1px solid rgba(153, 0, 0, 0.18);
  background: color-mix(in srgb, #fbfaf7 28%, white 32%);
  transform: translateX(100%);
  transition: transform 220ms ease;
}

body.drawer-open .publications-drawer {
  transform: translateX(0);
}

.drawer-inner {
  display: flex;
  height: 100%;
  flex-direction: column;
}

.drawer-tab {
  display: inline-grid;
  width: 26px;
  height: 100%;
  place-items: center;
  border: 1px solid rgba(153, 0, 0, 0.22);
  border-right: 0;
  border-radius: 4px 0 0 4px;
  background: var(--paper);
  color: var(--accent-dark);
  cursor: pointer;
  transition: left 160ms ease, width 160ms ease;
}

.drawer-tab {
  position: absolute;
  top: 0;
  bottom: 0;
  left: -26px;
}

.drawer-tab svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
  transition: transform 180ms ease;
}

body:not(.drawer-open) .drawer-tab svg {
  transform: none;
}

body.drawer-open .drawer-tab svg {
  transform: rotate(180deg);
}

.drawer-tab:hover,
.drawer-tab:focus-visible {
  left: -34px;
  width: 34px;
  outline: none;
}

.drawer-header {
  padding: 28px 24px 18px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #fff 0%, #fffdfa 100%);
}

.drawer-header h2 {
  margin-bottom: 0;
  color: var(--ink);
}

.reference-list {
  margin: 0;
  list-style: none;
  counter-reset: references;
  overflow-y: auto;
  padding: 14px 18px 30px;
  scroll-behavior: smooth;
}

.reference-item {
  counter-increment: references;
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  padding: 12px 8px;
  border-bottom: 1px solid rgba(221, 215, 202, 0.86);
  scroll-margin-top: 18px;
  transition: background 180ms ease, box-shadow 180ms ease;
}

.reference-item::before {
  content: "[" counter(references) "]";
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.reference-item.is-highlighted {
  background: #fff0a8;
  box-shadow: inset 0 0 0 1px rgba(153, 115, 0, 0.2);
}

.reference-item.is-linked {
  background: #fff0a8;
  box-shadow: inset 0 0 0 1px rgba(153, 115, 0, 0.2);
}

.reference-text {
  margin: 0;
  color: #252525;
  font-size: 0.94rem;
  line-height: 1.45;
}

.reference-title {
  color: var(--ink);
  font-weight: 400;
  text-decoration: none;
}

.reference-title:hover,
.reference-title:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

.reference-venue-full {
  color: var(--muted);
  font-style: italic;
}

.reference-venue-short {
  color: var(--muted);
  font-style: italic;
  font-weight: 700;
}

.reference-note {
  color: var(--accent-dark);
  font-weight: 700;
}

@media (max-width: 920px) {
  .hero,
  .details-grid,
  .split-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-media {
    max-width: 320px;
  }
}

@media (max-width: 1080px) {
  :root {
    --drawer-width: min(430px, 86vw);
  }

  body.drawer-open main,
  body.drawer-open .site-header,
  body.drawer-open .footer {
    margin-right: 0;
  }

  .publications-drawer {
    min-width: 0;
  }
}

@media (max-width: 620px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .nav-links {
    width: 100%;
    justify-content: space-between;
  }

  .section-band {
    padding-block: 20px;
    padding-inline: 18px;
  }

  .research-section {
    padding-bottom: 72px;
  }

  .venn-wrap {
    width: min(100%, 360px);
    min-width: 0;
    aspect-ratio: 1.1 / 1;
    margin-top: -54px;
  }

  .venn-circle {
    width: 38%;
    font-size: 0.78rem;
  }

  .venn-circle span {
    max-width: 66%;
  }

  .circle-top {
    left: 27%;
    top: 17%;
  }

  .circle-top span {
    transform: translateY(-38%);
  }

  .circle-left {
    left: 22%;
    top: 43%;
  }

  .circle-left span {
    transform: translateX(8%);
  }

  .circle-right {
    right: 22%;
    top: 43%;
  }

  .circle-right span {
    transform: translateX(-8%);
  }

  .paper-set {
    gap: 3px;
  }

  .paper-set li {
    font-size: 0.6rem;
  }

  .paper-set-interface {
    left: 58%;
    right: auto;
    top: 4%;
  }

  .paper-set-ml {
    right: 82%;
    left: auto;
    top: 64%;
  }

  .paper-set-environment {
    left: 57%;
    right: auto;
    top: 86%;
  }

  .timeline li {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .footer {
    flex-direction: column;
  }
}