:root {
  --ink: #071426;
  --ink-soft: #10203a;
  --blue: #155ee7;
  --blue-bright: #4f8cff;
  --cyan: #72d9ec;
  --coral: #f47d6f;
  --gold: #ffcc78;
  --paper: #f3f0e9;
  --paper-warm: #e9e3d7;
  --white: #fff;
  --text: #152137;
  --muted: #596477;
  --line: rgba(12, 28, 52, 0.13);
  --serif: Georgia, "Times New Roman", serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  --max: 1180px;
  --pad: clamp(1.25rem, 4vw, 3rem);
  --radius: 1.25rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 280px;
  color: var(--text);
  background: var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

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

a {
  color: inherit;
}

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

::selection {
  color: var(--white);
  background: var(--blue);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 200;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  color: var(--ink);
  background: var(--gold);
  border-radius: 0.35rem;
  font-weight: 800;
  transform: translateY(-180%);
  transition: transform 180ms ease;
}

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

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  display: flex;
  width: 100%;
  height: 5.4rem;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--pad);
  color: var(--white);
  border-bottom: 1px solid transparent;
  transition:
    height 250ms ease,
    background 250ms ease,
    border-color 250ms ease,
    backdrop-filter 250ms ease;
}

.site-header.is-scrolled {
  height: 4.5rem;
  background: rgba(5, 18, 35, 0.82);
  border-bottom-color: rgba(255, 255, 255, 0.09);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  position: relative;
  display: block;
  width: 2.15rem;
  height: 2.15rem;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 50%;
}

.brand-mark::before,
.brand-mark::after {
  position: absolute;
  content: "";
  background: rgba(255, 255, 255, 0.32);
  transform-origin: left center;
}

.brand-mark::before {
  width: 1.55rem;
  height: 1px;
  top: 0.52rem;
  left: 0.35rem;
  transform: rotate(45deg);
}

.brand-mark::after {
  width: 1.4rem;
  height: 1px;
  top: 1.55rem;
  left: 0.35rem;
  transform: rotate(-40deg);
}

.brand-mark i {
  position: absolute;
  display: block;
  width: 0.32rem;
  height: 0.32rem;
  background: var(--coral);
  border-radius: 50%;
  box-shadow: 0 0 0.8rem rgba(244, 125, 111, 0.7);
}

.brand-mark i:nth-child(1) {
  top: 0.33rem;
  left: 0.35rem;
}

.brand-mark i:nth-child(2) {
  top: 0.36rem;
  right: 0.35rem;
  background: var(--cyan);
}

.brand-mark i:nth-child(3) {
  right: 0.38rem;
  bottom: 0.36rem;
  background: var(--gold);
}

.brand-mark i:nth-child(4) {
  bottom: 0.34rem;
  left: 0.35rem;
  background: var(--blue-bright);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 0.8rem;
  letter-spacing: 0.18em;
}

.brand small {
  margin-top: 0.12rem;
  color: rgba(255, 255, 255, 0.64);
  font-size: 0.63rem;
  letter-spacing: 0.23em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.7vw, 2.3rem);
}

.site-nav a {
  position: relative;
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-decoration: none;
  text-transform: uppercase;
  transition: color 180ms ease;
}

.site-nav a:not(.nav-cta)::after {
  position: absolute;
  right: 0;
  bottom: -0.4rem;
  left: 0;
  height: 1px;
  content: "";
  background: var(--coral);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

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

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.site-nav .nav-cta {
  padding: 0.68rem 1rem;
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
  transition:
    color 180ms ease,
    background 180ms ease,
    border-color 180ms ease;
}

.site-nav .nav-cta:hover,
.site-nav .nav-cta:focus-visible {
  color: var(--ink);
  background: var(--white);
  border-color: var(--white);
}

.nav-toggle {
  display: none;
}

.hero {
  position: relative;
  display: grid;
  min-height: 100svh;
  overflow: hidden;
  align-items: center;
  color: var(--white);
  background: var(--ink);
}

.hero::after {
  position: absolute;
  z-index: 1;
  inset: 0;
  content: "";
  background:
    linear-gradient(90deg, rgba(3, 14, 30, 0.93) 0%, rgba(4, 15, 32, 0.8) 40%, rgba(4, 14, 30, 0.18) 74%),
    linear-gradient(0deg, rgba(4, 14, 30, 0.85) 0%, transparent 35%);
  pointer-events: none;
}

.hero-art {
  position: absolute;
  inset: 0;
  background: url("assets/algorithmic-horizon.png") center / cover no-repeat;
  animation: hero-drift 18s ease-in-out infinite alternate;
}

.hero-grid {
  position: absolute;
  z-index: 2;
  inset: 0;
  opacity: 0.16;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.07) 1px, transparent 1px);
  background-size: 6.25rem 6.25rem;
  mask-image: linear-gradient(to bottom, transparent, black 20%, black 75%, transparent);
  pointer-events: none;
}

@keyframes hero-drift {
  from {
    transform: scale(1.01);
  }
  to {
    transform: scale(1.045) translate3d(-0.6%, -0.4%, 0);
  }
}

.hero-content {
  position: relative;
  z-index: 3;
  width: min(var(--max), calc(100% - (var(--pad) * 2)));
  margin: 0 auto;
  padding: 8.5rem 0 8rem;
}

.eyebrow {
  display: flex;
  max-width: 47rem;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: clamp(1.8rem, 4vw, 3.2rem);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.67rem;
  font-weight: 800;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}

.eyebrow-line {
  width: clamp(2.2rem, 5vw, 5rem);
  height: 1px;
  background: linear-gradient(90deg, var(--coral), rgba(244, 125, 111, 0));
}

.hero h1 {
  max-width: 910px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(3.15rem, 7.1vw, 7.1rem);
  font-weight: 400;
  letter-spacing: -0.058em;
  line-height: 0.91;
  text-wrap: balance;
}

.hero h1 span {
  display: block;
  color: transparent;
  background: linear-gradient(100deg, #fff 10%, #b9d9ff 48%, #ffd39c 90%);
  background-clip: text;
  -webkit-background-clip: text;
}

.hero-intro {
  max-width: 660px;
  margin: 2rem 0 0;
  color: rgba(255, 255, 255, 0.76);
  font-family: var(--serif);
  font-size: clamp(1.1rem, 2vw, 1.42rem);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2.2rem;
}

.button {
  display: inline-flex;
  min-height: 3.25rem;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.8rem 1.25rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-decoration: none;
  text-transform: uppercase;
  transition:
    transform 180ms ease,
    color 180ms ease,
    background 180ms ease,
    border-color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button svg {
  width: 1.15rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}

.button-primary {
  color: var(--ink);
  background: var(--white);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--gold);
}

.button-quiet {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.24);
}

.button-quiet:hover,
.button-quiet:focus-visible {
  border-color: rgba(255, 255, 255, 0.65);
}

.event-quicklook {
  display: flex;
  max-width: 790px;
  margin: clamp(3rem, 8vh, 6rem) 0 0;
  padding: 1.15rem 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
}

.event-quicklook div {
  padding: 0 2.2rem;
  border-right: 1px solid rgba(255, 255, 255, 0.14);
}

.event-quicklook div:first-child {
  padding-left: 0;
}

.event-quicklook div:last-child {
  border-right: 0;
}

.event-quicklook dt {
  margin-bottom: 0.35rem;
  color: rgba(255, 255, 255, 0.43);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.event-quicklook dd {
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.88rem;
  font-weight: 650;
}

.scroll-cue {
  position: absolute;
  z-index: 4;
  right: var(--pad);
  bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: rgba(255, 255, 255, 0.45);
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-decoration: none;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}

.scroll-cue i {
  position: relative;
  display: block;
  width: 1px;
  height: 4rem;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.18);
}

.scroll-cue i::after {
  position: absolute;
  top: -100%;
  left: 0;
  width: 1px;
  height: 100%;
  content: "";
  background: var(--coral);
  animation: scroll-line 2.2s ease-in-out infinite;
}

@keyframes scroll-line {
  0% {
    top: -100%;
  }
  60%,
  100% {
    top: 100%;
  }
}

.section {
  padding: clamp(5rem, 10vw, 9rem) 0;
}

.section-shell {
  width: min(var(--max), calc(100% - (var(--pad) * 2)));
  margin: 0 auto;
}

.kicker {
  margin: 0 0 1.1rem;
  color: var(--blue);
  font-size: 0.67rem;
  font-weight: 850;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.section-heading h2,
.invitation-copy h2,
.details-copy h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.7rem, 5.1vw, 5rem);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 0.98;
  text-wrap: balance;
}

.section-heading-row {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: clamp(2rem, 7vw, 7rem);
  align-items: end;
  margin-bottom: clamp(2.7rem, 6vw, 5rem);
}

.section-heading-row > p {
  max-width: 34rem;
  margin: 0 0 0.35rem;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 1.15rem;
  line-height: 1.55;
}

.themes-heading {
  max-width: 820px;
  margin-bottom: clamp(2.7rem, 6vw, 5rem);
}

.vision {
  position: relative;
  overflow: hidden;
}

.vision::after {
  position: absolute;
  z-index: -1;
  top: 7%;
  right: -12rem;
  width: 28rem;
  height: 28rem;
  content: "";
  border: 1px solid rgba(21, 94, 231, 0.12);
  border-radius: 50%;
  box-shadow:
    0 0 0 4rem rgba(21, 94, 231, 0.025),
    0 0 0 8rem rgba(21, 94, 231, 0.018);
}

.vision-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(3rem, 9vw, 9rem);
  align-items: start;
}

.vision-copy {
  padding-top: 0.3rem;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
}

.vision-copy p {
  max-width: 45rem;
  margin: 0 0 1.35rem;
}

.vision-copy .lead {
  color: var(--text);
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  line-height: 1.45;
}

.vision-copy em {
  color: var(--blue);
}

.thesis-card {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: center;
  margin: clamp(4rem, 8vw, 7rem) 0 0;
  padding: clamp(2rem, 4vw, 3.5rem);
  color: var(--white);
  background:
    linear-gradient(112deg, rgba(16, 41, 76, 0.97), rgba(7, 20, 38, 0.99)),
    var(--ink);
  border-radius: var(--radius);
  box-shadow: 0 1.4rem 4rem rgba(7, 20, 38, 0.14);
}

.thesis-card::after {
  position: absolute;
  inset: 0;
  content: "";
  opacity: 0.15;
  background-image: radial-gradient(circle at center, #fff 1px, transparent 1.4px);
  background-size: 2.1rem 2.1rem;
  mask-image: linear-gradient(90deg, transparent 40%, black);
  pointer-events: none;
}

.thesis-card p {
  position: relative;
  z-index: 1;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.55rem, 3vw, 2.65rem);
  line-height: 1.25;
}

.thesis-card footer {
  position: relative;
  z-index: 1;
  align-self: end;
  color: var(--gold);
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}

.themes {
  background: var(--paper-warm);
}

.theme-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem;
}

.theme-card {
  position: relative;
  grid-column: span 3;
  min-height: 25rem;
  overflow: hidden;
  padding: clamp(1.6rem, 3vw, 2.4rem);
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(12, 28, 52, 0.08);
  border-radius: var(--radius);
  transition:
    transform 250ms ease,
    box-shadow 250ms ease,
    background 250ms ease;
}

.theme-card:hover {
  z-index: 2;
  background: var(--white);
  box-shadow: 0 1.5rem 4rem rgba(7, 20, 38, 0.1);
  transform: translateY(-0.4rem);
}

.theme-card-featured {
  grid-column: span 6;
  min-height: 22rem;
  padding-right: min(44%, 31rem);
  color: var(--white);
  background: var(--ink);
}

.theme-card-featured:hover {
  background: var(--ink-soft);
}

.theme-card-featured::after {
  position: absolute;
  top: -18%;
  right: -4%;
  width: 43%;
  aspect-ratio: 1;
  content: "";
  border: 1px solid rgba(114, 217, 236, 0.27);
  border-radius: 50%;
  box-shadow:
    0 0 0 3.5rem rgba(79, 140, 255, 0.07),
    0 0 0 7rem rgba(79, 140, 255, 0.035);
}

.theme-number {
  position: absolute;
  top: 1.7rem;
  right: 1.8rem;
  color: rgba(21, 40, 72, 0.26);
  font-family: var(--serif);
  font-size: 1rem;
  font-style: italic;
}

.theme-card-featured .theme-number {
  color: rgba(255, 255, 255, 0.38);
}

.theme-icon {
  width: 4rem;
  height: 4rem;
  margin-bottom: 3.7rem;
  color: var(--blue);
}

.theme-icon svg {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}

.theme-icon circle {
  fill: var(--paper-warm);
}

.theme-card-featured .theme-icon {
  color: var(--cyan);
}

.theme-card-featured .theme-icon circle {
  fill: var(--ink);
}

.theme-card h3 {
  margin: 0 0 1rem;
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3.2vw, 2.7rem);
  font-weight: 400;
  letter-spacing: -0.035em;
}

.theme-card p {
  max-width: 37rem;
  margin: 0;
  color: var(--muted);
  line-height: 1.67;
}

.theme-card-featured p {
  color: rgba(255, 255, 255, 0.67);
}

.theme-card ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1.65rem 0 0;
  padding: 0;
  list-style: none;
}

.theme-card li {
  padding: 0.52rem 0.72rem;
  color: rgba(255, 255, 255, 0.77);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 700;
}

.invitation {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: #0a1c36;
}

.invitation::after {
  position: absolute;
  inset: 0;
  content: "";
  opacity: 0.25;
  background:
    radial-gradient(circle at 20% 20%, rgba(79, 140, 255, 0.45), transparent 35%),
    radial-gradient(circle at 85% 80%, rgba(244, 125, 111, 0.22), transparent 35%);
}

.invitation-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: clamp(4rem, 10vw, 10rem);
  align-items: center;
}

.invitation-orbit {
  position: relative;
  width: min(100%, 29rem);
  aspect-ratio: 1;
  margin: auto;
}

.orbit {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.17);
  border-radius: 50%;
}

.orbit-one {
  inset: 2%;
  animation: orbit-spin 24s linear infinite;
}

.orbit-two {
  inset: 20%;
  border-color: rgba(114, 217, 236, 0.22);
  animation: orbit-spin 17s linear infinite reverse;
}

@keyframes orbit-spin {
  to {
    transform: rotate(360deg);
  }
}

.orbit i {
  position: absolute;
  display: block;
  width: 0.7rem;
  height: 0.7rem;
  background: var(--blue-bright);
  border: 2px solid #0a1c36;
  border-radius: 50%;
  box-shadow: 0 0 1.4rem rgba(79, 140, 255, 0.8);
}

.orbit-one i:nth-child(1) {
  top: 11%;
  left: 18%;
}

.orbit-one i:nth-child(2) {
  top: 49%;
  right: -0.35rem;
  background: var(--coral);
}

.orbit-one i:nth-child(3) {
  bottom: 8%;
  left: 27%;
  background: var(--gold);
}

.orbit-two i:nth-child(1) {
  top: -0.35rem;
  left: 50%;
  background: var(--cyan);
}

.orbit-two i:nth-child(2) {
  bottom: 11%;
  right: 8%;
}

.orbit-core {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 43%;
  aspect-ratio: 1;
  place-content: center;
  text-align: center;
  background: radial-gradient(circle at 50% 40%, #163f76, #0a1c36 70%);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  box-shadow:
    inset 0 0 3rem rgba(79, 140, 255, 0.24),
    0 0 5rem rgba(79, 140, 255, 0.12);
  transform: translate(-50%, -50%);
}

.orbit-core::before,
.orbit-core::after {
  position: absolute;
  top: 50%;
  left: 50%;
  content: "";
  border: 1px dashed rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.orbit-core::before {
  width: 132%;
  height: 132%;
}

.orbit-core::after {
  width: 174%;
  height: 174%;
}

.orbit-core span {
  color: var(--cyan);
  font-size: 0.62rem;
  font-weight: 850;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.orbit-core strong {
  font-family: var(--serif);
  font-size: clamp(1.45rem, 3vw, 2.25rem);
  font-weight: 400;
}

.invitation-copy .kicker,
.details-copy .kicker {
  color: var(--coral);
}

.invitation-copy p:not(.kicker) {
  max-width: 43rem;
  margin: 1.7rem 0 0;
  color: rgba(255, 255, 255, 0.64);
  font-family: var(--serif);
  font-size: 1.15rem;
  line-height: 1.7;
}

.community-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 2rem;
}

.community-tags span {
  padding: 0.62rem 0.85rem;
  color: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 750;
}

.speakers {
  background: #f7f5f0;
}

.speaker-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem;
}

.speaker-card {
  display: grid;
  grid-column: span 3;
  grid-template-columns: 9.25rem 1fr;
  min-height: 19rem;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition:
    transform 230ms ease,
    box-shadow 230ms ease;
}

.speaker-card:nth-child(5) {
  grid-column: 2 / span 4;
}

.speaker-card:hover {
  box-shadow: 0 1.5rem 4rem rgba(7, 20, 38, 0.1);
  transform: translateY(-0.35rem);
}

.speaker-monogram {
  position: relative;
  display: grid;
  overflow: hidden;
  place-items: center;
  color: var(--white);
  background:
    radial-gradient(circle at 75% 20%, rgba(114, 217, 236, 0.26), transparent 35%),
    linear-gradient(150deg, #183d73, #09192f);
}

.speaker-card:nth-child(2n) .speaker-monogram {
  background:
    radial-gradient(circle at 20% 75%, rgba(244, 125, 111, 0.24), transparent 38%),
    linear-gradient(145deg, #251f55, #09192f);
}

.speaker-monogram::before,
.speaker-monogram::after {
  position: absolute;
  width: 9rem;
  height: 9rem;
  content: "";
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
}

.speaker-monogram::after {
  width: 4.8rem;
  height: 4.8rem;
}

.speaker-monogram span {
  position: relative;
  z-index: 2;
  font-family: var(--serif);
  font-size: 2.1rem;
  font-style: italic;
}

.speaker-monogram i {
  position: absolute;
  z-index: 1;
  width: 0.5rem;
  height: 0.5rem;
  background: var(--coral);
  border: 2px solid #10294e;
  border-radius: 50%;
}

.speaker-monogram i:nth-child(2) {
  top: 24%;
  left: 24%;
}

.speaker-monogram i:nth-child(3) {
  right: 23%;
  bottom: 25%;
  background: var(--cyan);
}

.speaker-monogram i:nth-child(4) {
  top: 18%;
  right: 13%;
  width: 0.32rem;
  height: 0.32rem;
  background: var(--gold);
}

.speaker-content {
  display: flex;
  flex-direction: column;
  padding: clamp(1.5rem, 3vw, 2.25rem);
}

.speaker-field {
  margin: 0 0 0.65rem;
  color: var(--blue);
  font-size: 0.62rem;
  font-weight: 850;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.speaker-content h3 {
  margin: 0 0 1rem;
  font-family: var(--serif);
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  font-weight: 400;
  letter-spacing: -0.035em;
}

.speaker-content > p:not(.speaker-field) {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

.speaker-content a {
  align-self: flex-start;
  margin-top: auto;
  padding-top: 1.2rem;
  color: var(--text);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.06em;
  text-decoration-color: rgba(21, 94, 231, 0.35);
  text-underline-offset: 0.3rem;
  text-transform: uppercase;
}

.speaker-content a:hover,
.speaker-content a:focus-visible {
  color: var(--blue);
  text-decoration-color: var(--blue);
}

.format {
  background: var(--paper);
}

.format .section-heading {
  max-width: 780px;
  margin-bottom: clamp(3rem, 7vw, 6rem);
}

.format-layout {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: clamp(3rem, 8vw, 8rem);
  align-items: start;
}

.format-timeline article {
  position: relative;
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1.5rem;
  padding: 0 0 3.5rem;
}

.format-timeline article:last-child {
  padding-bottom: 0;
}

.format-timeline article:not(:last-child)::after {
  position: absolute;
  top: 3.1rem;
  bottom: 0.35rem;
  left: 1.68rem;
  width: 1px;
  content: "";
  background: linear-gradient(var(--blue), rgba(21, 94, 231, 0.08));
}

.timeline-marker {
  position: relative;
  z-index: 1;
  display: grid;
  width: 3.4rem;
  height: 3.4rem;
  place-items: center;
  color: var(--blue);
  background: var(--paper);
  border: 1px solid rgba(21, 94, 231, 0.27);
  border-radius: 50%;
  font-family: var(--serif);
  font-style: italic;
}

.timeline-label {
  margin: 0 0 0.45rem;
  color: var(--coral);
  font-size: 0.62rem;
  font-weight: 850;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.format-timeline h3 {
  margin: 0 0 0.65rem;
  font-family: var(--serif);
  font-size: clamp(1.65rem, 3vw, 2.25rem);
  font-weight: 400;
  letter-spacing: -0.025em;
}

.format-timeline p:last-child {
  max-width: 41rem;
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.schedule-note {
  position: sticky;
  top: 7rem;
  padding: clamp(1.75rem, 4vw, 2.7rem);
  color: var(--white);
  background: var(--ink);
  border-radius: var(--radius);
  box-shadow: 0 1.5rem 4rem rgba(7, 20, 38, 0.12);
}

.schedule-note::before {
  display: block;
  width: 3.8rem;
  height: 2px;
  margin-bottom: 2.5rem;
  content: "";
  background: linear-gradient(90deg, var(--coral), var(--gold));
}

.schedule-label {
  margin: 0 0 0.7rem;
  color: var(--cyan);
  font-size: 0.63rem;
  font-weight: 850;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}

.schedule-note > strong {
  display: block;
  margin-bottom: 1.3rem;
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  letter-spacing: -0.035em;
}

.schedule-note p:not(.schedule-label) {
  margin: 0;
  color: rgba(255, 255, 255, 0.63);
  line-height: 1.65;
}

.schedule-note b {
  color: var(--white);
  font-weight: 750;
}

.schedule-note hr {
  margin: 1.7rem 0;
  border: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.details {
  position: relative;
  overflow: hidden;
  padding: clamp(5rem, 10vw, 9rem) 0;
  color: var(--white);
  background: var(--ink);
}

.details-art {
  position: absolute;
  inset: 0;
  opacity: 0.3;
  background:
    linear-gradient(90deg, var(--ink) 5%, rgba(7, 20, 38, 0.5)),
    url("assets/algorithmic-horizon.png") center right / cover no-repeat;
}

.details-content {
  position: relative;
  z-index: 1;
}

.details-copy {
  max-width: 870px;
}

.details-copy p:not(.kicker) {
  max-width: 600px;
  margin: 1.6rem 0 0;
  color: rgba(255, 255, 255, 0.65);
  font-family: var(--serif);
  font-size: 1.15rem;
  line-height: 1.65;
}

.detail-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: clamp(3rem, 7vw, 5.5rem);
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.detail-cards > div {
  padding: 2rem clamp(1rem, 3vw, 2.5rem);
  border-right: 1px solid rgba(255, 255, 255, 0.16);
}

.detail-cards > div:first-child {
  padding-left: 0;
}

.detail-cards > div:last-child {
  border-right: 0;
}

.detail-cards span,
.detail-cards strong,
.detail-cards small {
  display: block;
}

.detail-cards span {
  margin-bottom: 0.7rem;
  color: var(--cyan);
  font-size: 0.62rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.detail-cards strong {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 400;
  letter-spacing: -0.04em;
}

.detail-cards small {
  margin-top: 0.35rem;
  color: rgba(255, 255, 255, 0.45);
}

.organizers {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 3rem;
}

.organizers > p {
  width: 100%;
  margin: 0 0 0.3rem;
  color: rgba(255, 255, 255, 0.42);
  font-size: 0.63rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.organizers a {
  display: grid;
  grid-template-columns: 3.4rem auto;
  gap: 0 1rem;
  min-width: min(100%, 20rem);
  align-items: center;
  padding: 0.85rem 1.2rem 0.85rem 0.85rem;
  color: var(--white);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  text-decoration: none;
  transition:
    background 180ms ease,
    transform 180ms ease;
}

.organizers a:hover,
.organizers a:focus-visible {
  background: rgba(255, 255, 255, 0.13);
  transform: translateY(-2px);
}

.organizers a > span {
  grid-row: span 2;
  display: grid;
  width: 3.4rem;
  height: 3.4rem;
  place-items: center;
  color: var(--ink);
  background: var(--gold);
  border-radius: 50%;
  font-family: var(--serif);
  font-weight: 700;
}

.organizers a:nth-of-type(2) > span {
  background: var(--cyan);
}

.organizers strong,
.organizers small {
  display: block;
}

.organizers strong {
  align-self: end;
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 400;
}

.organizers small {
  align-self: start;
  color: rgba(255, 255, 255, 0.45);
  font-size: 0.68rem;
}

.site-footer {
  display: flex;
  min-height: 6.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem var(--pad);
  color: rgba(255, 255, 255, 0.46);
  background: #040d1a;
  font-size: 0.7rem;
}

.site-footer p {
  margin: 0;
}

.site-footer p span {
  padding: 0 0.35rem;
  color: var(--coral);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.67);
  font-weight: 750;
  text-decoration: none;
}

.footer-mark {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.footer-mark i {
  display: block;
  width: 0.3rem;
  height: 0.3rem;
  background: var(--blue-bright);
  border-radius: 50%;
}

.footer-mark i:nth-child(2) {
  background: var(--cyan);
}

.footer-mark i:nth-child(3) {
  width: 1.8rem;
  height: 1px;
  background: rgba(255, 255, 255, 0.22);
  border-radius: 0;
}

.footer-mark i:nth-child(4) {
  background: var(--gold);
}

.footer-mark i:nth-child(5) {
  background: var(--coral);
}

.reveal {
  opacity: 0;
  transform: translateY(1.3rem);
  transition:
    opacity 700ms ease,
    transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.theme-card:nth-child(2),
.speaker-card:nth-child(2) {
  transition-delay: 70ms;
}

.theme-card:nth-child(3),
.speaker-card:nth-child(3) {
  transition-delay: 140ms;
}

.theme-card:nth-child(4),
.speaker-card:nth-child(4) {
  transition-delay: 210ms;
}

.speaker-card:nth-child(5) {
  transition-delay: 280ms;
}

@media (max-width: 920px) {
  .site-header {
    height: 4.6rem;
  }

  .nav-toggle {
    position: relative;
    z-index: 102;
    display: grid;
    width: 2.8rem;
    height: 2.8rem;
    padding: 0;
    place-content: center;
    gap: 0.4rem;
    color: var(--white);
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 50%;
    cursor: pointer;
  }

  .nav-toggle > span:not(.sr-only) {
    display: block;
    width: 1.15rem;
    height: 1px;
    background: currentColor;
    transition: transform 180ms ease;
  }

  .nav-toggle[aria-expanded="true"] > span:first-child {
    transform: translateY(0.22rem) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] > span:nth-child(2) {
    transform: translateY(-0.22rem) rotate(-45deg);
  }

  .site-nav {
    position: fixed;
    z-index: 101;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 1.2rem;
    padding: 5rem var(--pad);
    background: rgba(4, 13, 26, 0.98);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-1rem);
    transition:
      opacity 200ms ease,
      transform 200ms ease;
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    font-family: var(--serif);
    font-size: clamp(2.1rem, 8vw, 4.2rem);
    font-weight: 400;
    letter-spacing: -0.04em;
    text-transform: none;
  }

  .site-nav .nav-cta {
    margin-top: 1rem;
    padding: 0;
    border: 0;
  }

  .site-nav .nav-cta:hover,
  .site-nav .nav-cta:focus-visible {
    color: var(--coral);
    background: none;
  }

  .scroll-cue {
    display: none;
  }

  .vision-grid,
  .invitation-grid,
  .format-layout {
    grid-template-columns: 1fr;
  }

  .vision-grid,
  .format-layout {
    gap: 3rem;
  }

  .invitation-grid {
    gap: 4.5rem;
  }

  .section-heading-row {
    grid-template-columns: 1fr;
    gap: 1.4rem;
  }

  .speaker-card {
    grid-column: span 6;
  }

  .speaker-card:nth-child(5) {
    grid-column: span 6;
  }

  .schedule-note {
    position: relative;
    top: auto;
  }
}

@media (max-width: 700px) {
  .hero {
    min-height: auto;
  }

  .hero::after {
    background:
      linear-gradient(90deg, rgba(3, 14, 30, 0.92), rgba(3, 14, 30, 0.5)),
      linear-gradient(0deg, rgba(4, 14, 30, 0.94), transparent 55%);
  }

  .hero-art {
    background-position: 60% center;
  }

  .hero-content {
    padding-top: 8rem;
  }

  .eyebrow {
    flex-wrap: wrap;
  }

  .eyebrow-line {
    display: none;
  }

  .event-quicklook {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.2rem;
  }

  .event-quicklook div {
    padding: 0;
    border: 0;
  }

  .event-quicklook div:last-child {
    grid-column: 1 / -1;
  }

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

  .thesis-card footer {
    writing-mode: initial;
  }

  .theme-card,
  .theme-card-featured {
    grid-column: span 6;
    min-height: 0;
    padding-right: clamp(1.6rem, 3vw, 2.4rem);
  }

  .theme-card-featured::after {
    display: none;
  }

  .speaker-card {
    grid-template-columns: 6.2rem 1fr;
  }

  .speaker-monogram::before {
    width: 6rem;
    height: 6rem;
  }

  .speaker-monogram::after {
    width: 3.5rem;
    height: 3.5rem;
  }

  .speaker-monogram span {
    font-size: 1.55rem;
  }

  .detail-cards {
    grid-template-columns: 1fr;
  }

  .detail-cards > div,
  .detail-cards > div:first-child {
    padding: 1.5rem 0;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.13);
  }

  .detail-cards > div:last-child {
    border-bottom: 0;
  }

  .site-footer {
    flex-direction: column;
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 500px) {
  .hero h1 {
    font-size: clamp(2.75rem, 14vw, 4rem);
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .event-quicklook {
    grid-template-columns: 1fr;
  }

  .event-quicklook div:last-child {
    grid-column: auto;
  }

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

  .speaker-monogram {
    min-height: 7rem;
  }

  .speaker-monogram::before {
    width: 9rem;
    height: 9rem;
  }

  .speaker-monogram::after {
    width: 4rem;
    height: 4rem;
  }

  .format-timeline article {
    grid-template-columns: 3.3rem 1fr;
    gap: 0.9rem;
  }

  .timeline-marker {
    width: 2.85rem;
    height: 2.85rem;
    font-size: 0.8rem;
  }

  .format-timeline article:not(:last-child)::after {
    top: 2.7rem;
    left: 1.42rem;
  }

  .organizers a {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}