:root {
  --ink: #172027;
  --muted: #5a6872;
  --soft: #f4f7f7;
  --line: #d9e1e3;
  --teal: #157c79;
  --teal-dark: #0d4f53;
  --coral: #b65a42;
  --amber: #b3832d;
  --paper: #ffffff;
  --night: #101820;
  --night-soft: #18252d;
  --max: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

section {
  scroll-margin-top: 82px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  letter-spacing: 0;
}

img,
video {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid #85c7c1;
  outline-offset: 3px;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  width: 100%;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  color: #f7fbfb;
  background: rgba(13, 21, 27, 0.64);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(12px);
}

.site-header.is-solid {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.96);
  border-bottom-color: var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  white-space: nowrap;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border: 2px solid currentColor;
  border-radius: 50%;
  position: relative;
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 12px;
  width: 12px;
  height: 2px;
  background: currentColor;
  transform: rotate(-18deg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 0.94rem;
  font-weight: 650;
}

.nav-links a {
  opacity: 0.88;
}

.nav-links a:hover {
  opacity: 1;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.hero-section {
  position: relative;
  min-height: 86svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #ffffff;
  background: var(--night);
  padding: 112px 28px 72px;
}

.hero-visual,
.hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-visual {
  object-fit: cover;
  object-position: center;
  opacity: 0.62;
  filter: saturate(0.88) contrast(0.95) brightness(0.92);
}

.hero-shade {
  background: rgba(8, 15, 21, 0.7);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(920px, 100%);
  margin: 0 auto;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: #7cc9c2;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.hero-content h1 {
  max-width: 900px;
  margin: 0;
  font-size: 4.1rem;
  line-height: 1.02;
  font-weight: 800;
}

.hero-copy {
  max-width: 720px;
  margin: 24px 0 0;
  color: #e4eeee;
  font-size: 1.22rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.hero-meta span {
  padding: 7px 11px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 6px;
  color: #f4fbfb;
  background: rgba(12, 28, 33, 0.45);
  font-size: 0.94rem;
  font-weight: 650;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 800;
}

.button.primary {
  color: #062a2c;
  background: #9bd8d1;
}

.button.primary:hover {
  background: #b8e5df;
}

.button.secondary {
  color: #f4fbfb;
  border-color: rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.08);
}

.button.secondary:hover {
  background: rgba(255, 255, 255, 0.16);
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 74px 28px;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.3fr);
  gap: 52px;
  align-items: start;
}

.section h2,
.section-heading h2,
.artifact-panel h2 {
  margin: 0;
  font-size: 2.2rem;
  line-height: 1.12;
}

.intro-copy p,
.section-heading p,
.artifact-panel p {
  color: var(--muted);
  font-size: 1.05rem;
}

.intro-copy p:first-child {
  margin-top: 0;
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 46px;
}

.pillars article,
.challenge-item,
.resource-card,
.media-tile,
.person-card,
.dates-grid div {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.pillars article {
  padding: 24px;
}

.pillar-index,
.resource-label,
.people-subhead span,
.person-card span,
.dates-grid span {
  display: block;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 850;
  text-transform: uppercase;
}

.pillars h3,
.challenge-item h3,
.resource-card h3,
.media-tile h3,
.person-card h3,
.schedule h3,
.topics h3 {
  margin: 10px 0 8px;
  font-size: 1.08rem;
  line-height: 1.28;
}

.pillars p,
.challenge-item p,
.resource-card p,
.media-tile p,
.person-card p,
.people-subhead p,
.schedule p {
  margin: 0;
  color: var(--muted);
}

.visual-section,
.resource-section {
  max-width: none;
  background: var(--soft);
}

.visual-section > *,
.resource-section > * {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading.compact {
  max-width: 840px;
}

.anchor-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 36px auto 0;
}

.anchor-figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.anchor-figure img {
  width: 100%;
  height: auto;
  background: #fff;
}

.anchor-figure figcaption {
  padding: 14px 16px 16px;
  color: var(--muted);
  font-size: 0.94rem;
}

.challenge-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.challenge-item {
  min-height: 190px;
  padding: 20px;
}

.challenge-item:nth-child(2) {
  border-top: 4px solid var(--teal);
}

.challenge-item:nth-child(3) {
  border-top: 4px solid var(--amber);
}

.challenge-item:nth-child(4) {
  border-top: 4px solid var(--coral);
}

.challenge-item:nth-child(5) {
  border-top: 4px solid #557a95;
}

.dark-section {
  max-width: none;
  color: #eff6f6;
  background: var(--night);
}

.dark-section > * {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}

.dark-section .section-heading p,
.dark-section .schedule p {
  color: #bdc9ca;
}

.schedule {
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.schedule-row {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 22px;
  padding: 22px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.schedule-row time {
  color: #a3d8d3;
  font-weight: 900;
}

.schedule-row h3 {
  margin-top: 0;
}

.resource-router {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.resource-card {
  min-height: 390px;
  display: flex;
  flex-direction: column;
  padding: 18px;
}

.resource-card.accent-teal {
  border-top: 5px solid var(--teal);
}

.resource-card.accent-coral {
  border-top: 5px solid var(--coral);
}

.resource-visual {
  height: 148px;
  margin-bottom: 18px;
  overflow: hidden;
  border: 1px solid #d9e3e5;
  border-radius: 6px;
  background: #edf3f3;
}

.resource-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.resource-visual.contain {
  background: #ffffff;
}

.resource-visual.contain img {
  object-fit: contain;
  padding: 10px;
}

.resource-visual.diagram img {
  padding: 8px;
}

.resource-visual.diagram {
  height: 184px;
}

.resource-visual.symbol {
  display: grid;
  place-items: center;
  color: #bfe7e2;
  background: var(--night);
}

.resource-visual.symbol span {
  font-size: 2.35rem;
  font-weight: 900;
  letter-spacing: 0;
}

.resource-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
  padding-top: 20px;
}

.resource-links a {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  padding: 7px 10px;
  border: 1px solid #b8c8ca;
  border-radius: 6px;
  color: var(--teal-dark);
  background: #f7fbfb;
  font-size: 0.9rem;
  font-weight: 800;
}

.resource-links a:hover {
  border-color: var(--teal);
  background: #e7f4f2;
}

.media-section {
  max-width: none;
}

.media-section > * {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  align-items: start;
}

.media-tile {
  overflow: hidden;
}

.media-tile.table-tile,
.media-tile.large,
.media-tile.multimodal-tile,
.media-tile.challenger-tile {
  grid-column: 1 / -1;
}

.media-tile img,
.media-tile video {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #e9eeee;
}

.media-tile video {
  background: #0e171d;
}

.media-tile.table-tile img {
  aspect-ratio: auto;
  height: clamp(220px, 28vw, 340px);
  padding: 14px;
  object-fit: contain;
  background: #ffffff;
}

.media-copy {
  padding: 18px;
}

.multi-modal-media {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  background: #ffffff;
}

.multi-modal-media figure {
  min-width: 0;
  margin: 0;
}

.multi-modal-media figcaption {
  padding: 10px 14px;
  color: var(--muted);
  background: #ffffff;
  font-size: 0.88rem;
  font-weight: 750;
}

.multi-modal-media video {
  background: #ffffff;
}

.multimodal-copy {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  gap: 18px;
  align-items: start;
}

.modality-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.modality-list li {
  padding-left: 12px;
  border-left: 4px solid var(--teal);
}

.modality-list li:nth-child(2) {
  border-left-color: var(--amber);
}

.modality-list li:nth-child(3) {
  border-left-color: var(--coral);
}

.modality-list strong {
  display: block;
  margin-bottom: 6px;
  line-height: 1.25;
}

.modality-list span {
  display: block;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.45;
}

.challenger-tile {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
}

.challenger-tile video {
  aspect-ratio: 3296 / 896;
}

.challenger-tile .media-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.topics {
  margin-top: 36px;
  padding: 26px;
  border-left: 5px solid var(--teal);
  background: var(--soft);
}

.topics ul {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.topics li + li {
  margin-top: 8px;
}

.date-section {
  max-width: none;
  background: #f8f4ed;
}

.date-section > * {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}

.dates-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.dates-grid div {
  padding: 20px;
  background: #fffdfa;
}

.dates-grid strong {
  display: block;
  margin-top: 8px;
  font-size: 1.22rem;
}

.people-group + .people-group {
  margin-top: 42px;
}

.people-subhead {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.people-subhead p {
  max-width: 680px;
  text-align: right;
}

.person-grid {
  display: grid;
  gap: 24px;
}

.speaker-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
}

.organizer-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.person-card {
  min-width: 0;
  overflow: hidden;
}

.person-photo {
  display: block;
  margin: 16px 16px 0;
  aspect-ratio: 1 / 1;
  border-radius: 6px;
  background: #e8eeee;
  overflow: hidden;
}

.person-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 180ms ease;
}

.person-card:hover .person-photo img {
  transform: scale(1.03);
}

.person-copy {
  padding: 16px 16px 18px;
}

.person-copy h3 a {
  color: var(--ink);
}

.person-copy h3 a:hover,
.person-email:hover {
  color: var(--teal-dark);
}

.person-email {
  display: inline-block;
  margin-top: 10px;
  color: var(--teal-dark);
  font-size: 0.82rem;
  font-weight: 650;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.artifact-section {
  max-width: none;
  background: var(--night-soft);
}

.artifact-panel {
  max-width: var(--max);
  margin: 0 auto;
  padding: 38px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  color: #eff6f6;
  background: rgba(255, 255, 255, 0.05);
}

.artifact-panel p {
  max-width: 790px;
  color: #c8d4d4;
}

.citation-section {
  max-width: none;
  background: var(--soft);
}

.citation-section > * {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}

.citation-list {
  display: grid;
  gap: 16px;
}

.citation-card {
  display: grid;
  grid-template-columns: minmax(220px, 0.42fr) minmax(0, 1fr);
  gap: 18px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.citation-meta span {
  display: block;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 850;
  text-transform: uppercase;
}

.citation-meta h3 {
  margin: 10px 0 8px;
  font-size: 1.08rem;
  line-height: 1.28;
}

.citation-meta p {
  margin: 0;
  color: var(--muted);
}

.citation-card pre {
  min-width: 0;
  margin: 0;
  padding: 15px;
  overflow-x: auto;
  border-radius: 6px;
  color: #dcebe8;
  background: #0e171d;
  font-size: 0.78rem;
  line-height: 1.45;
}

.citation-card code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 28px;
  color: #d2dddd;
  background: #0b1117;
}

.site-footer p {
  margin: 0;
}

.site-footer div {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-weight: 800;
}

.site-footer a {
  color: #a3d8d3;
}

@media (max-width: 1050px) {
  .challenge-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .resource-router,
  .speaker-grid,
  .organizer-grid,
  .anchor-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .media-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .multimodal-copy,
  .challenger-tile {
    grid-template-columns: 1fr;
  }

  .modality-list {
    grid-template-columns: 1fr;
  }

  .dates-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .site-header {
    height: auto;
    min-height: 62px;
    padding: 12px 18px;
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .nav-links {
    width: 100%;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 2px;
    font-size: 0.86rem;
  }

  .hero-section {
    min-height: 84svh;
    padding: 132px 20px 56px;
  }

  .hero-content h1 {
    font-size: 2.55rem;
    line-height: 1.06;
  }

  .hero-copy {
    font-size: 1.04rem;
  }

  .section {
    padding: 56px 20px;
  }

  .section-grid,
  .pillars,
  .anchor-grid,
  .resource-router,
  .speaker-grid,
  .organizer-grid,
  .dates-grid,
  .media-grid,
  .challenge-list {
    grid-template-columns: 1fr;
  }

  .people-subhead {
    align-items: start;
    flex-direction: column;
  }

  .people-subhead p {
    text-align: left;
  }

  .section h2,
  .section-heading h2,
  .artifact-panel h2 {
    font-size: 1.82rem;
  }

  .multi-modal-media {
    grid-template-columns: 1fr;
  }

  .media-tile.table-tile {
    grid-column: span 1;
  }

  .schedule-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .citation-card {
    grid-template-columns: 1fr;
  }

  .artifact-panel {
    padding: 26px;
  }
}