:root {
  --navy: #16384b;
  --navy-deep: #081d2b;
  --pink: #d3548b;
  --pink-dark: #a83269;
  --accent-soft: #eba3c0;
  --pink-wash: #fcf2f7;
  --ink: #25343d;
  --muted: #617783;
  --line: #d6e1e6;
  --surface: #fdfefe;
  --surface-soft: #f1f6f8;
  --page-width: 1120px;
  --hero-width: 960px;
  --feature-width: 980px;
  --content-width: 920px;
  --narrow-width: 700px;
  --header-height: 72px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: "Open Sans", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

a {
  color: var(--pink-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--pink-dark);
  text-decoration-thickness: 2px;
}

button,
summary,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--accent-soft);
  outline-offset: 3px;
}

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

::selection {
  background: var(--pink-wash);
  color: var(--navy-deep);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--navy);
  font-family: "Raleway", Arial, sans-serif;
  line-height: 1.18;
}

p {
  margin: 0 0 1.15rem;
}

ul,
ol,
dl {
  margin-top: 0;
}

.container {
  width: min(var(--page-width), calc(100% - 40px));
  margin: 0 auto;
}

.skip-link {
  position: fixed;
  z-index: 1100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  border-radius: 0.4rem;
  background: #fff;
  color: var(--navy);
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform 140ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

/* Header and navigation */
#header {
  position: fixed;
  z-index: 1000;
  inset: 0 0 auto;
  height: var(--header-height);
  background: #1e3c4e;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.1);
}

#header.header-scrolled {
  background: #1e3c4e;
  box-shadow: 0 8px 30px rgba(8, 29, 43, 0.16);
}

.header-inner {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

#logo {
  display: inline-flex;
  flex-shrink: 0;
  align-items: baseline;
  gap: 0.4rem;
  color: #fff;
  font-family: "Raleway", Arial, sans-serif;
  font-weight: 800;
  letter-spacing: 0.015em;
  line-height: 1;
  text-decoration: none;
}

#logo span,
#logo small {
  font-size: 1.08rem;
  font-weight: 800;
}

#logo small {
  color: var(--accent-soft);
}

.nav-menu,
.past-events-menu ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-menu > li {
  position: relative;
}

.nav-menu a,
.past-events-menu summary {
  display: block;
  padding: 0.7rem 0.58rem;
  border: 0;
  color: rgba(255, 255, 255, 0.84);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  list-style: none;
  text-decoration: none;
  text-transform: uppercase;
}

.nav-menu a:hover,
.nav-menu a.active,
.past-events-menu summary:hover,
.past-events-menu[open] > summary {
  color: var(--accent-soft);
}

.past-events-menu summary::-webkit-details-marker {
  display: none;
}

.past-events-menu > summary {
  position: relative;
  padding-right: 1.25rem;
}

.past-events-menu > summary::before {
  position: absolute;
  top: 50%;
  right: 0.35rem;
  width: 0.38rem;
  height: 0.38rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  content: "";
  transform: translateY(-68%) rotate(45deg);
}

.past-events-menu ul {
  position: absolute;
  top: calc(100% + 0.2rem);
  right: 0;
  width: 220px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 0.55rem;
  background: #fff;
  box-shadow: 0 16px 35px rgba(8, 29, 43, 0.22);
}

.past-events-menu ul a {
  padding: 0.78rem 1rem;
  color: var(--navy);
  font-size: 0.8rem;
  letter-spacing: 0;
  text-transform: none;
}

.past-events-menu ul a:hover {
  background: var(--surface-soft);
  color: var(--pink-dark);
}

.past-events-menu ul a::after {
  display: none;
}

.mobile-nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 0;
  border-radius: 0.45rem;
  background: transparent;
  cursor: pointer;
}

.mobile-nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  border-radius: 999px;
  background: #fff;
  transition: transform 160ms ease, opacity 160ms ease;
}

/* Intro banner */
#intro {
  position: relative;
  display: grid;
  min-height: clamp(430px, 55svh, 540px);
  overflow: hidden;
  place-items: center;
  background: var(--navy-deep) url("../assets/images/venue/reykjavik-panorama.jpg") center 48% / cover no-repeat;
  color: #fff;
  isolation: isolate;
}

#intro::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(8, 29, 43, 0.84) 0%, rgba(8, 29, 43, 0.62) 52%, rgba(8, 29, 43, 0.38) 100%),
    linear-gradient(180deg, rgba(8, 29, 43, 0.18), rgba(8, 29, 43, 0.68));
  content: "";
}

.intro-container {
  width: min(var(--hero-width), calc(100% - 40px));
  padding: calc(var(--header-height) + 1rem) 0 2rem;
  text-align: center;
  text-shadow: 0 2px 22px rgba(0, 0, 0, 0.52);
}

#intro h1 {
  max-width: var(--hero-width);
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.97);
  font-size: clamp(2.5rem, 5.5vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.04;
  text-align: left;
}

#intro h1 .title-line {
  display: block;
}

.hero-details {
  display: flex;
  max-width: var(--hero-width);
  margin: 0 auto 1rem;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.event-context {
  display: inline-flex;
  margin: 0;
  align-items: center;
  gap: 0.45rem;
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.event-context svg {
  width: 1rem;
  height: 1rem;
  flex: 0 0 auto;
  color: var(--accent-soft);
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.event-meta {
  display: flex;
  margin: 0;
  padding: 0;
  align-items: center;
  justify-content: center;
  gap: 0;
  list-style: none;
}

.event-meta li {
  display: flex;
  min-width: 0;
  padding: 0 1rem;
  align-items: baseline;
  gap: 0.4rem;
  border-right: 1px solid rgba(255, 255, 255, 0.25);
}

.event-meta li:last-child {
  border-right: 0;
}

.event-meta strong {
  color: var(--accent-soft);
  font-size: 0.66rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.event-meta span {
  color: rgba(255, 255, 255, 0.86);
  font-size: 0.82rem;
}

/* Shared sections */
main > section {
  padding: 2rem 0;
}

.section-header {
  margin: 0 0 1.4rem;
}

.section-header h2,
.quick-cfp h2 {
  font-size: clamp(1.9rem, 3.5vw, 2.55rem);
  font-weight: 800;
  letter-spacing: -0.025em;
}

.section-header > p:last-child {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Workshop note and call for papers */
.workshop-note {
  max-width: var(--content-width);
  margin: 1.75rem 0 0;
  color: var(--ink);
  font-size: 1.02rem;
  line-height: 1.65;
}

.dates-overview {
  padding: 1.5rem 0 0.75rem;
}

.dates-overview .important-dates {
  margin: 0;
}

.quick-cfp {
  padding: 1.75rem 0 3.25rem;
  background: #fff;
}

.quick-cfp-card {
  max-width: var(--content-width);
}

.quick-cfp-copy {
  padding: 0 0 1rem;
}

.quick-cfp-copy h2 {
  margin-bottom: 0.7rem;
}

.quick-cfp-copy p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.03rem;
}

.cfp-topics {
  margin: 1.35rem 0 1.5rem;
}

.cfp-topics h3 {
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.cfp-topics .topic-list {
  color: var(--ink);
  line-height: 1.6;
}

.important-dates {
  max-width: var(--narrow-width);
  margin: 1.5rem 0 1rem;
}

.important-dates h3 {
  margin-bottom: 0.65rem;
  font-size: 1.05rem;
}

.important-dates dl {
  margin: 0;
  border-top: 1px solid var(--line);
}

.important-dates dl > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  padding: 0.65rem 0.75rem;
  align-items: baseline;
  border-bottom: 1px solid var(--line);
}

.important-dates dl > div:nth-child(even) {
  background: rgba(211, 84, 139, 0.045);
}

.important-dates dt {
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 600;
}

.important-dates dd {
  margin: 0;
  color: var(--pink-dark);
  font-family: "Raleway", Arial, sans-serif;
  font-size: 0.95rem;
  font-weight: 800;
}

.submission-note {
  margin: 0.8rem 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-style: italic;
}

.cfp-tracks {
  margin: 1.35rem 0 1.1rem;
}

.cfp-policy-summary {
  margin: 0 0 0.8rem;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.6;
}

.cfp-policy-summary strong {
  color: var(--navy);
}

.cfp-expander {
  border-top: 1px solid var(--line);
}

.cfp-expander summary {
  display: flex;
  min-height: 52px;
  align-items: center;
  gap: 0.7rem;
  padding: 0.8rem 0;
  color: var(--navy);
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

.cfp-expander summary::-webkit-details-marker {
  display: none;
}

.cfp-expander summary::before {
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid var(--pink);
  border-bottom: 2px solid var(--pink);
  content: "";
  transform: rotate(-45deg);
  transition: transform 150ms ease;
}

.cfp-expander[open] summary::before {
  transform: rotate(45deg) translate(-2px, -2px);
}

.summary-open,
.cfp-expander[open] .summary-closed {
  display: none;
}

.cfp-expander[open] .summary-open {
  display: inline;
}

.cfp-expander-content {
  padding: 0.5rem 0 1.8rem 1.35rem;
}

/* Speaker and organizer profiles */
.speaker-list {
  max-width: var(--feature-width);
  margin: 0;
}

.keynote-feature {
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr);
  gap: 3rem;
  padding: 0.25rem 0 2.25rem;
  align-items: center;
}

.keynote-feature + .keynote-feature {
  padding-top: 2.25rem;
  border-top: 1px solid var(--line);
}

.keynote-feature:last-child {
  padding-bottom: 0;
}

.keynote-feature-reverse {
  grid-template-columns: minmax(0, 1fr) 270px;
}

.keynote-feature-reverse .keynote-media {
  order: 2;
}

.keynote-feature-reverse .keynote-copy {
  order: 1;
}

.keynote-media {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 0.4rem;
  background: var(--surface-soft);
}

.keynote-media::before {
  position: absolute;
  z-index: 0;
  inset: 0.65rem -0.65rem -0.65rem 0.65rem;
  border-radius: 0.55rem;
  background: linear-gradient(135deg, rgba(211, 84, 139, 0.2), rgba(95, 127, 145, 0.18));
  content: "";
}

.keynote-feature-reverse .keynote-media::before {
  inset: 0.65rem 0.65rem -0.65rem -0.65rem;
}

.keynote-photo-frame {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  overflow: hidden;
  border-radius: 0.4rem;
}

.keynote-photo {
  width: 100%;
  height: 100%;
  border-radius: 0.4rem;
  object-fit: cover;
}

.keynote-copy h3 {
  margin-bottom: 0.25rem;
  font-size: clamp(1.65rem, 3vw, 2.2rem);
}

.keynote-role {
  margin-bottom: 0.9rem;
  color: var(--pink-dark);
  font-size: 0.92rem;
  font-weight: 700;
}

.keynote-copy > p:not(.keynote-role) {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.keynote-talk {
  margin-top: 1rem;
  padding-top: 0.65rem;
  border-top: 1px solid var(--line);
}

.keynote-talk h4 {
  margin-bottom: 0.3rem;
  font-size: 1rem;
}

.keynote-talk p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.organizer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 2rem;
}

.organizer-entry {
  --organizer-photo-size: 144px;
  --organizer-backdrop: linear-gradient(135deg, rgba(135, 105, 160, 0.26), rgba(186, 160, 208, 0.2));
  --organizer-backdrop-active: linear-gradient(135deg, rgba(115, 60, 154, 0.55), rgba(178, 134, 210, 0.42));
  position: relative;
  display: grid;
  grid-template-columns: var(--organizer-photo-size) minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem 0;
  align-items: center;
  border-top: 1px solid var(--line);
  cursor: pointer;
}

.organizer-entry::before {
  position: absolute;
  z-index: 0;
  top: 1.45rem;
  left: 0.45rem;
  width: var(--organizer-photo-size);
  height: var(--organizer-photo-size);
  border-radius: 0.45rem;
  background: var(--organizer-backdrop);
  content: "";
}

.organizer-entry:nth-child(even) {
  --organizer-backdrop: linear-gradient(135deg, rgba(71, 126, 151, 0.26), rgba(161, 208, 218, 0.22));
  --organizer-backdrop-active: linear-gradient(135deg, rgba(27, 109, 147, 0.55), rgba(103, 190, 210, 0.42));
}

.organizer-entry:hover::before,
.organizer-entry:focus-within::before {
  background: var(--organizer-backdrop-active);
}

.organizer-entry img {
  position: relative;
  z-index: 1;
  width: var(--organizer-photo-size);
  height: var(--organizer-photo-size);
  border-radius: 0.35rem;
  object-fit: cover;
}

.organizer-photo {
  position: relative;
  z-index: 1;
  display: block;
  width: var(--organizer-photo-size);
  height: var(--organizer-photo-size);
  overflow: hidden;
  border-radius: 0.35rem;
}

.organizer-photo--lea img {
  object-position: 50% 0;
}

.organizer-photo--pin-yu img {
  transform: translateY(-3px) scale(1.14);
  transform-origin: 50% 38%;
}

.organizer-photo--yao img {
  transform: translateY(3px) scale(1.2);
  transform-origin: 50% 34%;
}

.organizer-entry h3 {
  margin-bottom: 0.18rem;
  font-size: 1.16rem;
  line-height: 1.25;
}

.organizer-entry h3 a {
  color: var(--navy);
  text-decoration: none;
}

.organizer-entry h3 a::after {
  content: "";
  position: absolute;
  z-index: 2;
  inset: 0;
}

.organizer-entry:hover h3 a,
.organizer-entry:focus-within h3 a {
  color: var(--pink-dark);
}

.organizer-entry h3 a:focus-visible::after {
  outline: 3px solid var(--accent-soft);
  outline-offset: 3px;
  border-radius: 0.35rem;
}

.organizer-entry p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.4;
  transition: color 180ms ease;
}

.organizer-entry:hover p,
.organizer-entry:focus-within p {
  color: var(--pink-dark);
}

/* Schedule */
.schedule-program {
  max-width: var(--content-width);
  margin: 0;
  border-block: 1px solid var(--line);
}

.schedule-note strong {
  color: var(--navy);
}

.schedule-item {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 1.1rem;
  padding: 0.75rem 1.1rem;
  border-bottom: 1px solid var(--line);
}

.schedule-item:last-child {
  border-bottom: 0;
}

.schedule-item:nth-child(even) {
  background: rgba(211, 84, 139, 0.045);
}

.schedule-item time {
  color: var(--pink-dark);
  font-family: "Raleway", Arial, sans-serif;
  font-weight: 800;
}

.schedule-item h3 {
  display: inline;
  margin: 0 0.45rem 0 0;
  font-size: 1rem;
}

.schedule-activity > p {
  display: inline;
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.schedule-subitem {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0.45rem;
  margin-top: 0.35rem;
  align-items: baseline;
}

.schedule-subitem h4 {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.schedule-subitem p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.schedule-details {
  margin-top: 0.15rem;
}

.schedule-details summary {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  gap: 0.35rem;
  color: var(--pink-dark);
  cursor: pointer;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  list-style: none;
  text-transform: uppercase;
}

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

.schedule-details summary::before {
  width: 0.48rem;
  height: 0.48rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  content: "";
  transform: rotate(-45deg);
  transition: transform 150ms ease;
}

.schedule-details[open] summary::before {
  transform: rotate(45deg) translate(-1px, -1px);
}

.schedule-details > div {
  max-width: 650px;
  padding: 0.25rem 0 0.05rem 0.85rem;
}

.schedule-details > div p {
  margin: 0;
  line-height: 1.55;
}

/* Expanded CFP */
.cfp-main > h3 {
  margin: 1.8rem 0 0.65rem;
  font-size: 1.25rem;
}

.cfp-main > h3:first-child {
  margin-top: 0;
}

.submission-tracks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.3rem 0 2rem;
}

.submission-tracks article {
  padding: 0.1rem 1rem 0.1rem 0;
}

.submission-tracks span {
  display: inline-flex;
  margin-bottom: 0.35rem;
  color: var(--pink-dark);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.submission-tracks h4 {
  margin-bottom: 0.4rem;
  font-size: 1rem;
}

.submission-tracks p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
}

.topic-list {
  margin-bottom: 0;
  padding-left: 1.25rem;
}

.topic-list li {
  padding-left: 0.25rem;
}

.topic-list li + li {
  margin-top: 0.7rem;
}

.policy-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 2.5rem;
  padding-top: 0.2rem;
}

.policy-grid h4 {
  margin-bottom: 0.3rem;
  font-size: 1rem;
}

.policy-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Footer */
#footer {
  padding: 3rem 0 1.5rem;
  background: var(--navy-deep);
  color: rgba(255, 255, 255, 0.7);
}

.footer-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 2rem;
}

.footer-brand {
  grid-column: 1;
  grid-row: 1;
}

.footer-contact {
  grid-column: 2;
  grid-row: 1;
  min-width: 190px;
  text-align: left;
}

.footer-layout strong,
.footer-layout span,
.footer-layout a {
  display: block;
}

.footer-layout strong {
  color: #fff;
  font-family: "Raleway", Arial, sans-serif;
  font-size: 1.1rem;
}

.footer-contact span {
  margin-bottom: 0.3rem;
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-layout p {
  margin: 0;
}

.footer-layout a {
  color: var(--accent-soft);
  font-weight: 700;
  text-underline-offset: 0.2em;
}

/* Responsive navigation and layouts */
@media (max-width: 1050px) {
  .js .mobile-nav-toggle {
    display: block;
  }

  .js #nav-menu-container {
    position: fixed;
    top: var(--header-height);
    right: 0;
    bottom: 0;
    width: min(360px, 88vw);
    padding: 1rem;
    background: rgba(8, 29, 43, 0.98);
    box-shadow: -20px 0 40px rgba(8, 29, 43, 0.32);
    overflow-y: auto;
    transform: translateX(105%);
    transition: transform 180ms ease;
  }

  .js body.nav-open #nav-menu-container {
    transform: translateX(0);
  }

  .js .nav-menu {
    display: block;
  }

  .js .nav-menu a,
  .js .past-events-menu summary {
    padding: 0.9rem 0.75rem;
    font-size: 0.86rem;
  }

  .js .past-events-menu ul {
    position: static;
    width: auto;
    margin: 0 0.75rem 0.5rem;
    border: 0;
    border-radius: 0.45rem;
    box-shadow: none;
  }

  html:not(.js) #nav-menu-container {
    max-width: calc(100% - 190px);
    overflow-x: auto;
  }

  html:not(.js) .nav-menu {
    min-width: max-content;
  }

  body.nav-open .mobile-nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  body.nav-open .mobile-nav-toggle span:nth-child(2) {
    opacity: 0;
  }

  body.nav-open .mobile-nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

@media (max-width: 860px) {
  main > section {
    padding: 2rem 0;
  }

  .quick-cfp {
    padding: 2.5rem 0 3rem;
  }

  .keynote-feature,
  .keynote-feature-reverse {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 2rem;
  }

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

  .organizer-entry:nth-child(n) {
    --organizer-photo-size: 124px;
    --organizer-backdrop: linear-gradient(135deg, rgba(135, 105, 160, 0.26), rgba(186, 160, 208, 0.2));
    --organizer-backdrop-active: linear-gradient(135deg, rgba(115, 60, 154, 0.55), rgba(178, 134, 210, 0.42));
    grid-template-columns: 124px minmax(0, 1fr);
  }

  .organizer-entry:nth-child(4n + 2),
  .organizer-entry:nth-child(4n + 3) {
    --organizer-backdrop: linear-gradient(135deg, rgba(71, 126, 151, 0.26), rgba(161, 208, 218, 0.22));
    --organizer-backdrop-active: linear-gradient(135deg, rgba(27, 109, 147, 0.55), rgba(103, 190, 210, 0.42));
  }

  .organizer-entry img {
    width: var(--organizer-photo-size);
    height: var(--organizer-photo-size);
  }
}

@media (min-width: 681px) and (max-width: 860px) {
  .organizer-entry:last-child:nth-child(odd) {
    grid-column: 1 / -1;
    width: calc((100% - 2rem) / 2);
    justify-self: center;
  }
}

@media (max-width: 680px) {
  :root {
    --header-height: 64px;
  }

  .container,
  .intro-container {
    width: min(100% - 28px, var(--page-width));
  }

  .intro-container {
    padding-top: calc(var(--header-height) + 1.5rem);
  }

  #intro {
    background-position: 27% center;
  }

  #logo span,
  #logo small {
    font-size: 0.88rem;
  }

  #intro h1 {
    font-size: clamp(2.1rem, 10vw, 3.2rem);
  }

  .hero-details {
    display: grid;
    margin-bottom: 1rem;
    justify-items: start;
    gap: 0.5rem;
  }

  .event-meta {
    display: flex;
    justify-content: flex-start;
    gap: 0.4rem 0;
    flex-wrap: wrap;
  }

  .event-meta li {
    padding: 0 0.65rem;
    border-right: 0;
  }

  .event-meta li:first-child {
    padding-left: 0;
  }

  .cfp-expander summary {
    padding-right: 0;
    padding-left: 0;
  }

  .submission-tracks,
  .policy-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .cfp-expander-content {
    padding-right: 0;
    padding-left: 0;
  }

  .keynote-feature,
  .keynote-feature-reverse {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .keynote-feature-reverse .keynote-media,
  .keynote-feature-reverse .keynote-copy {
    order: initial;
  }

  .keynote-media {
    width: min(100%, 250px);
  }

  .organizer-grid {
    grid-template-columns: 1fr;
  }

  .organizer-entry {
    --organizer-photo-size: 104px;
    grid-template-columns: 104px minmax(0, 1fr);
    padding: 0.9rem 0;
  }

  .organizer-entry:nth-child(n) {
    --organizer-backdrop: linear-gradient(135deg, rgba(135, 105, 160, 0.26), rgba(186, 160, 208, 0.2));
    --organizer-backdrop-active: linear-gradient(135deg, rgba(115, 60, 154, 0.55), rgba(178, 134, 210, 0.42));
  }

  .organizer-entry:nth-child(even) {
    --organizer-backdrop: linear-gradient(135deg, rgba(71, 126, 151, 0.26), rgba(161, 208, 218, 0.22));
    --organizer-backdrop-active: linear-gradient(135deg, rgba(27, 109, 147, 0.55), rgba(103, 190, 210, 0.42));
  }

  .organizer-entry img {
    width: var(--organizer-photo-size);
    height: var(--organizer-photo-size);
  }

  .schedule-item {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 0.75rem;
    padding: 0.72rem 0;
  }

  .footer-layout {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .footer-contact {
    grid-column: 1;
    grid-row: 1;
    min-width: 0;
  }

  .footer-brand {
    grid-column: 1;
    grid-row: 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}