:root {
  --ink: #0c1929;
  --ink-soft: #2a3d52;
  --muted: #5c6f84;
  --paper: #eef2f6;
  --paper-deep: #e0e6ed;
  --surface: rgba(255, 255, 255, 0.58);
  --teal: #3d6f8f;
  --teal-bright: #5a8faf;
  --teal-deep: #0a1830;
  --gold: #b87333;
  --gold-soft: #c9853f;
  --line: rgba(12, 25, 41, 0.12);
  --shadow: 0 24px 60px rgba(10, 24, 48, 0.09);
  --radius: 18px;
  --max: 1120px;
  --page-pad: clamp(1rem, 3vw, 2rem);
  --font-display: "Cormorant Garamond", Georgia, serif;
  --font-body: "Sora", "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h, 4.5rem) + 0.5rem);
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  background:
    radial-gradient(1200px 700px at 10% -10%, rgba(90, 143, 175, 0.16), transparent 55%),
    radial-gradient(900px 600px at 95% 5%, rgba(201, 133, 63, 0.11), transparent 50%),
    linear-gradient(180deg, #f5f7fa 0%, var(--paper) 40%, #e9eef4 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: var(--teal-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

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

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
}

p {
  margin: 0 0 1em;
}

em {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
}

.atmosphere {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.55;
  animation: drift 18s ease-in-out infinite;
}

.orb-a {
  width: 420px;
  height: 420px;
  top: -80px;
  left: -60px;
  background: rgba(90, 143, 175, 0.24);
}

.orb-b {
  width: 360px;
  height: 360px;
  top: 20%;
  right: -80px;
  background: rgba(201, 133, 63, 0.14);
  animation-delay: -6s;
}

.orb-c {
  width: 480px;
  height: 480px;
  bottom: -120px;
  left: 30%;
  background: rgba(10, 24, 48, 0.1);
  animation-delay: -12s;
}

.grid-veil {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(12, 25, 41, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(12, 25, 41, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse at 50% 20%, black 20%, transparent 75%);
}

@keyframes drift {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(20px, 30px, 0) scale(1.06);
  }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.85rem max(var(--page-pad), calc((100% - var(--max)) / 2 + var(--page-pad)));
  backdrop-filter: blur(14px);
  background: rgba(238, 242, 246, 0.8);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.brand-mark {
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 0.35rem;
  background:
    radial-gradient(circle at 70% 30%, var(--gold-soft), transparent 40%),
    linear-gradient(145deg, var(--teal-bright), var(--teal-deep));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.25);
}

.brand-text {
  font-family: var(--font-display);
  font-size: clamp(0.95rem, 2.2vw, 1.2rem);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.hero-neurips {
  display: inline-block;
  margin: clamp(1.25rem, 3vh, 1.85rem) auto 0;
  opacity: 0.9;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.hero-neurips:hover,
.hero-neurips:focus {
  opacity: 1;
  transform: translateY(-1px);
}

.hero-neurips img {
  display: block;
  height: clamp(4rem, 8vw, 6rem);
  width: auto;
}

.nav {
  display: none;
  gap: 1.1rem;
  margin-left: auto;
  margin-right: 0.5rem;
}

.nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.86rem;
  font-weight: 500;
}

.nav a:hover {
  color: var(--teal);
}

.site-header .btn-small {
  display: none;
}

.nav-toggle {
  margin-left: auto;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: rgba(255, 255, 255, 0.6);
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 1.1rem;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

.mobile-nav {
  position: sticky;
  top: 3.7rem;
  z-index: 35;
  display: grid;
  gap: 0.35rem;
  padding: 1rem max(var(--page-pad), calc((100% - var(--max)) / 2 + var(--page-pad))) 1.25rem;
  background: rgba(238, 242, 246, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.mobile-nav[hidden] {
  display: none;
}

.mobile-nav a {
  text-decoration: none;
  color: var(--ink);
  font-weight: 500;
  padding: 0.55rem 0.2rem;
  border-bottom: 1px solid rgba(12, 25, 41, 0.06);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--teal-deep), var(--teal));
  color: #f4f7fb;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 10px 24px rgba(10, 24, 48, 0.18);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(10, 24, 48, 0.22);
}

.btn-ghost {
  background: transparent;
  color: var(--teal-deep);
  border-color: rgba(10, 24, 48, 0.22);
  box-shadow: none;
}

.btn-ghost:hover {
  color: var(--teal-deep);
  background: rgba(90, 143, 175, 0.12);
}

.btn-small {
  padding: 0.55rem 0.95rem;
  font-size: 0.82rem;
}

main {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--page-pad) 4rem;
  box-sizing: border-box;
}

.hero {
  --hero-h: calc(100svh - var(--header-h, 4.25rem));
  position: relative;
  height: var(--hero-h);
  min-height: var(--hero-h);
  max-height: var(--hero-h);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  gap: clamp(0.75rem, 2.5vh, 2rem);
  padding: clamp(0.75rem, 2.5vh, 2rem) var(--page-pad) 0;
  overflow: hidden;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  box-sizing: border-box;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("assets/hero-curves.svg");
  background-repeat: no-repeat;
  background-position: center 72%;
  background-size: 140% 48%;
  opacity: 0.55;
  pointer-events: none;
  z-index: 0;
  -webkit-mask-image:
    linear-gradient(
      90deg,
      #000 0%,
      #000 14%,
      rgba(0, 0, 0, 0.22) 36%,
      rgba(0, 0, 0, 0.08) 50%,
      rgba(0, 0, 0, 0.22) 64%,
      #000 86%,
      #000 100%
    ),
    linear-gradient(180deg, #000 0%, #000 48%, transparent 82%);
  -webkit-mask-composite: source-in;
  mask-image:
    linear-gradient(
      90deg,
      #000 0%,
      #000 14%,
      rgba(0, 0, 0, 0.22) 36%,
      rgba(0, 0, 0, 0.08) 50%,
      rgba(0, 0, 0, 0.22) 64%,
      #000 86%,
      #000 100%
    ),
    linear-gradient(180deg, #000 0%, #000 48%, transparent 82%);
  mask-composite: intersect;
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: min(38%, 18rem);
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.72) 35%,
    rgba(255, 255, 255, 0.96) 68%,
    #ffffff 100%
  );
  pointer-events: none;
  z-index: 0;
}

.org-strip {
  position: relative;
  z-index: 1;
  flex: 0 0 auto;
  width: 100%;
  max-width: var(--max);
  margin-top: 0;
  padding: clamp(0.85rem, 2.2vh, 1.5rem) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.55) 0%,
    rgba(255, 255, 255, 0.92) 40%,
    #ffffff 100%
  );
}

.org-strip-label {
  margin: 0 0 1.1rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.org-logos {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1rem 1.85rem;
}

.org-logos li {
  display: flex;
  align-items: center;
  justify-content: center;
}

.org-logo {
  display: block;
  height: 2rem;
  width: auto;
  max-width: 9.5rem;
  object-fit: contain;
  opacity: 1;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.org-logo-vector {
  height: 2.2rem;
  max-width: 12rem;
  object-fit: contain;
}

.org-logo-nvidia {
  height: 2.5rem;
}

.org-logo-crest {
  height: 2.75rem;
}

.org-logos li:hover .org-logo {
  opacity: 1;
  transform: translateY(-1px);
}

.hero-copy {
  position: relative;
  z-index: 1;
  flex: 1 1 auto;
  max-width: 48rem;
  width: 100%;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 0;
  padding: clamp(0.5rem, 2vh, 1.5rem) 1.25rem;
  background: radial-gradient(
    ellipse 80% 70% at 50% 45%,
    rgba(245, 247, 250, 0.88) 0%,
    rgba(245, 247, 250, 0.55) 45%,
    rgba(245, 247, 250, 0) 72%
  );
}

.eyebrow {
  display: inline-block;
  margin: 0 0 0.75rem;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero .eyebrow {
  text-transform: none;
  letter-spacing: 0.04em;
  font-size: clamp(1.25rem, 2.4vw, 1.55rem);
  font-weight: 500;
}

.hero-heading {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 100%;
  margin: 0 0 1rem;
}

.brand-hero {
  font-size: clamp(3.1rem, 7.5vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--teal-deep);
  margin: 0 0 0.55rem;
  max-width: 16ch;
}

.hero-subhead {
  font-family: var(--font-display);
  font-size: clamp(0.7rem, 1.9vw, 1.35rem);
  font-weight: 500;
  font-style: italic;
  line-height: 1.25;
  color: var(--ink-soft);
  margin: 0;
  max-width: none;
  width: auto;
  white-space: nowrap;
  text-align: center;
  box-sizing: border-box;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.5vw, 2.15rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
  margin: 0 0 1.5rem;
  max-width: none;
}

.hero-meta {
  display: block;
  margin-top: 0.35rem;
  font-family: var(--font-body);
  font-size: clamp(1.05rem, 1.9vw, 1.25rem);
  font-weight: 500;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.32s; }
.delay-4 { animation-delay: 0.44s; }

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section {
  padding: clamp(3.5rem, 8vh, 5.5rem) 0;
  border-top: 1px solid var(--line);
}

.section.cfp {
  border-top: 0;
  padding-top: clamp(1rem, 2.5vh, 1.75rem);
}

.schedule {
  padding-top: clamp(1.25rem, 3vh, 2rem);
  padding-bottom: clamp(1.5rem, 3vh, 2.25rem);
}

.schedule + .cfp {
  padding-top: clamp(0.75rem, 2vh, 1.25rem);
}

.cfp-subsection {
  padding: clamp(2rem, 5vh, 3.25rem) 0 0;
  border-top: 0;
  margin-top: clamp(1.5rem, 4vh, 2.5rem);
}

.cfp > .section-head + .cfp-subsection {
  margin-top: clamp(0.5rem, 2vh, 1rem);
  padding-top: 0;
}

.cfp-subsection .section-head {
  margin-bottom: 1.5rem;
}

.cfp-subsection .section-head h2 {
  font-size: clamp(1.65rem, 3.4vw, 2.35rem);
}

.section-head {
  max-width: 42rem;
  margin: 0 auto 2rem;
  text-align: center;
}

.section-head-wide {
  max-width: none;
}

.section-head h2 {
  font-size: clamp(2rem, 4.2vw, 3rem);
  color: var(--teal-deep);
}

.section-lede {
  color: var(--muted);
  font-size: 1.02rem;
  margin-left: auto;
  margin-right: auto;
}

.about-grid {
  display: grid;
  gap: 2rem;
}

.about-main p {
  font-size: 1.05rem;
  color: var(--ink-soft);
}

.about-main .term {
  font-family: inherit;
  font-style: normal;
  font-weight: 700;
  color: var(--ink);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.18em;
  text-decoration-color: var(--gold-soft);
}

.about-visual {
  margin-top: 0;
}

.about-art {
  width: 100%;
  height: auto;
  border-radius: 18px;
  border: 1px solid rgba(12, 25, 41, 0.08);
  box-shadow: var(--shadow);
}

.about-aside {
  padding: 1.5rem 0 0;
  border-top: 1px solid var(--line);
}

.about-aside h3 {
  font-size: 1.35rem;
  color: var(--ink);
  margin-top: 1.25rem;
}

.about-aside h3:first-child {
  margin-top: 0;
}

.about-aside p {
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.topic-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.topic-list li {
  position: relative;
  padding: 1rem 1rem 1rem 2.4rem;
  background: var(--surface);
  border: 1px solid rgba(12, 25, 41, 0.08);
  border-radius: 14px;
  color: var(--ink-soft);
  backdrop-filter: blur(6px);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.topic-list li::before {
  content: "";
  position: absolute;
  left: 1rem;
  top: 1.35rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal-bright), var(--gold-soft));
}

.topic-list li:hover {
  border-color: rgba(61, 111, 143, 0.4);
  transform: translateX(3px);
}

.date-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  counter-reset: dates;
}

.date-rail li {
  display: grid;
  gap: 0.25rem;
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(10, 24, 48, 0.95), rgba(61, 111, 143, 0.9));
  color: #f4f7fb;
  box-shadow: var(--shadow);
}

.date-rail time {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.date-rail span {
  color: rgba(244, 247, 251, 0.84);
  font-size: 0.95rem;
}

.people-grid {
  display: grid;
  gap: 1rem;
}

.people-grid.lineup {
  max-width: 66rem;
  margin-left: auto;
  margin-right: auto;
  justify-content: center;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 17rem));
  gap: clamp(1.5rem, 4vw, 3rem);
}

.lineup-group {
  margin-top: clamp(2rem, 5vh, 3.25rem);
}

.lineup-group:first-of-type {
  margin-top: clamp(1.25rem, 3vh, 2rem);
}

.lineup-subhead {
  display: block;
  text-align: center;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.4vw, 1.6rem);
  color: var(--ink);
  letter-spacing: 0.005em;
  margin: 0 0 clamp(1.25rem, 3vh, 2rem);
  padding-bottom: 0.6rem;
  width: 100%;
}

.lineup-subhead::after {
  content: "";
  display: block;
  width: 3rem;
  height: 2px;
  background: var(--accent, #C9853F);
  margin: 0.6rem auto 0;
  border-radius: 2px;
  opacity: 0.7;
}

.person-placeholder {
  color: var(--muted);
}

.person-placeholder h3,
.person-placeholder .role,
.person-placeholder .affil {
  color: var(--muted);
}

.avatar-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: min(17rem, 100%);
  aspect-ratio: 1 / 1;
  height: auto;
  margin: 0 auto 1rem;
  border-radius: 50%;
  border: 2px dashed rgba(12, 25, 41, 0.22);
  background: rgba(12, 25, 41, 0.03);
  color: rgba(12, 25, 41, 0.35);
  flex-shrink: 0;
}

.placeholder-plus {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 8vw, 5rem);
  font-weight: 300;
  line-height: 1;
  color: rgba(12, 25, 41, 0.4);
}

.badge-role-placeholder {
  visibility: hidden;
}

.lineup-announcement {
  margin: clamp(2rem, 4vh, 2.5rem) auto 0;
  max-width: 40rem;
  text-align: center;
  color: var(--muted);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
}

.section-head-panel {
  max-width: 52rem;
}

.person {
  padding: 1.35rem 0;
  border-top: 1px solid var(--line);
  text-align: center;
}

.avatar {
  width: min(17rem, 100%);
  max-width: 17rem;
  aspect-ratio: 1 / 1;
  height: auto;
  margin: 0 auto 0.85rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 3.2rem);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--teal-deep);
  background:
    radial-gradient(circle at 30% 25%, rgba(201, 133, 63, 0.22), transparent 45%),
    linear-gradient(145deg, rgba(90, 143, 175, 0.22), rgba(10, 24, 48, 0.08));
  border: 1px solid rgba(12, 25, 41, 0.1);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.avatar-photo {
  display: block;
  width: min(17rem, 100%);
  max-width: 17rem;
  aspect-ratio: 1 / 1;
  height: auto;
  object-fit: cover;
  object-position: center top;
  padding: 0;
  background: none;
  box-shadow: none;
  flex-shrink: 0;
}

.avatar-figure {
  color: var(--teal);
}

.avatar-link {
  position: relative;
  display: inline-block;
  width: min(17rem, 100%);
  max-width: 17rem;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 0.85rem;
  text-decoration: none;
  isolation: isolate;
}

.avatar-link .avatar,
.avatar-link .avatar-photo {
  margin: 0;
  display: block;
}

.avatar-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(10, 24, 48, 0.72), rgba(184, 115, 51, 0.55));
  color: #ffffff;
  opacity: 0;
  transform: scale(0.98);
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: none;
}

.avatar-overlay-icon {
  width: clamp(2.5rem, 6vw, 3.25rem);
  height: clamp(2.5rem, 6vw, 3.25rem);
  color: #ffffff;
  padding: 0.6rem;
  border: 1.5px solid rgba(255, 255, 255, 0.75);
  border-radius: 999px;
  backdrop-filter: blur(2px);
  box-sizing: content-box;
}

.avatar-link:hover .avatar-overlay,
.avatar-link:focus-visible .avatar-overlay {
  opacity: 1;
  transform: scale(1);
}

.avatar-figure svg {
  width: 48%;
  height: 48%;
  max-width: none;
  fill: currentColor;
  opacity: 0.72;
}

.avatar-figure circle {
  fill: currentColor;
}

.avatar-figure path {
  fill: currentColor;
}

.person h3 {
  font-size: 1.45rem;
  margin-bottom: 0.2rem;
  color: var(--ink);
}

.person .role,
.person .affil,
.person .topic {
  margin: 0;
  font-size: 0.92rem;
}

.person .role {
  color: var(--ink-soft);
}

.person .affil {
  color: var(--muted);
  margin-bottom: 0.45rem;
}

.speakers .person .affil,
.organizers .person .affil,
.panel .person .affil {
  margin-bottom: 0;
}

.person .topic {
  color: var(--teal);
  font-weight: 500;
}

.person .email {
  font-size: 0.86rem;
  word-break: break-word;
}

.badge {
  display: inline-block;
  margin: 0.45rem 0 0;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.badge {
  color: var(--gold);
}

.badge-role {
  margin: 0 auto 0.55rem;
  padding: 0.32rem 0.95rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--teal-deep);
  background: rgba(90, 143, 175, 0.14);
  border: 1px solid rgba(90, 143, 175, 0.35);
  border-radius: 999px;
}

.panel .person {
  text-align: center;
}

.schedule-table {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.sched-row {
  display: grid;
  gap: 0.35rem;
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--line);
}

.sched-row time {
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--teal);
  font-variant-numeric: tabular-nums;
}

.sched-row h3 {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

.sched-row p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.sched-row.break {
  opacity: 0.72;
}

.sched-row.break h3 {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
}

.cfp-formats {
  display: grid;
  gap: 1.75rem;
  margin-bottom: clamp(2rem, 4vh, 2.75rem);
}

.cfp-tracks {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
  margin-bottom: clamp(2rem, 4vh, 2.75rem);
}

.cfp-submit-cta {
  margin-top: clamp(2rem, 4vh, 2.75rem);
  padding: clamp(1.75rem, 4vw, 2.5rem);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 20% 20%, rgba(201, 133, 63, 0.28), transparent 55%),
    linear-gradient(135deg, var(--teal-deep), #14283f);
  color: #f4f7fb;
  text-align: center;
}

.cfp-submit-cta h3 {
  font-size: clamp(1.5rem, 2.6vw, 1.9rem);
  color: #ffffff;
  margin: 0 0 0.5rem;
}

.cfp-submit-cta p {
  color: rgba(244, 247, 251, 0.85);
  margin: 0 0 1.4rem;
}

.cfp-submit-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.cfp-submit-buttons .btn {
  background: #f4f7fb;
  color: var(--teal-deep);
  box-shadow: none;
}

.cfp-submit-buttons .btn:hover {
  background: #ffffff;
  color: var(--teal-deep);
}

.cfp-format {
  padding: 1.75rem;
  border: 1px solid rgba(12, 25, 41, 0.1);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink-soft);
  backdrop-filter: blur(6px);
}

.cfp-format h3 {
  font-size: 1.5rem;
  color: var(--ink);
  line-height: 1.3;
  margin: 0 0 0.9rem;
}

.cfp-format .format-limit {
  display: inline;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: 0.85em;
  color: var(--muted);
  margin-left: 0.35em;
}

.cfp-format p {
  margin: 0 0 0.9rem;
}

.cfp-format ul,
.cfp-format ol {
  margin: 0 0 1rem;
  padding-left: 1.35rem;
}

.cfp-format li + li {
  margin-top: 0.35rem;
}

.cfp-format .review-heading {
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.45rem;
}

.cfp-format-cta {
  margin: 1.25rem 0 0;
}

.cfp-categories {
  text-align: left;
}

.cfp-categories h3 {
  font-size: 1.5rem;
  color: var(--ink);
  margin: 0 0 0.5rem;
}

.cfp-categories > p {
  color: var(--ink-soft);
  margin: 0 0 0.75rem;
}

.category-list {
  list-style: none;
  margin: 0.75rem 0 1.25rem;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.category-list li {
  position: relative;
  padding: 1rem 1rem 1rem 2.4rem;
  background: var(--surface);
  border: 1px solid rgba(12, 25, 41, 0.08);
  border-radius: 14px;
  color: var(--ink-soft);
  backdrop-filter: blur(6px);
}

.category-list li::before {
  content: "";
  position: absolute;
  left: 1rem;
  top: 1.35rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal-bright), var(--gold-soft));
}

.category-list strong {
  color: var(--ink);
}

.cfp-note {
  color: var(--muted);
  margin: 0.75rem 0 0;
}

.cfp-prose {
  max-width: none;
  margin: 0;
  color: var(--ink-soft);
  text-align: left;
}

.cfp-prose p {
  margin: 0 0 0.95rem;
  line-height: 1.65;
}

.cfp-prose h3 {
  font-size: 1.25rem;
  color: var(--ink);
  margin: 1.75rem 0 0.6rem;
}

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

.cfp-prose ul {
  margin: 0 0 1.1rem;
  padding-left: 1.2rem;
}

.cfp-prose li {
  margin-bottom: 0.35rem;
  line-height: 1.6;
}

.cfp-prose strong {
  color: var(--ink);
}

.cfp-prose pre {
  margin: 0.3rem 0 1.1rem;
  padding: 0.85rem 1rem;
  background: rgba(12, 25, 41, 0.05);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow-x: auto;
}

.cfp-prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.95rem;
  color: var(--teal-deep);
}

.cfp-key-dates {
  list-style: none;
  padding: 0;
  margin: 0 0 1.1rem;
  display: grid;
  gap: 0.6rem;
}

.cfp-key-dates li {
  padding: 0.85rem 1.1rem;
  background: var(--surface);
  border: 1px solid rgba(12, 25, 41, 0.08);
  border-radius: 12px;
  color: var(--ink-soft);
  line-height: 1.55;
}

.cfp-key-dates strong {
  color: var(--ink);
  min-width: 12rem;
  display: inline-block;
}

.cfp-grid {
  display: grid;
  gap: 1.25rem;
}

.cfp-block {
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
}

.cfp-block h3 {
  font-size: 1.4rem;
}

.cfp-block ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--ink-soft);
}

.cfp-block li + li {
  margin-top: 0.45rem;
}

.cfp-cta {
  padding: 1.75rem;
  border: 1px solid rgba(12, 25, 41, 0.1);
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, rgba(10, 24, 48, 0.96), rgba(61, 111, 143, 0.9));
  color: #f4f7fb;
}

.cfp-cta h3,
.cfp-cta p {
  color: #f4f7fb;
}

.cfp-cta p {
  opacity: 0.88;
}

.cfp-cta .btn {
  background: #f4f7fb;
  color: var(--teal-deep);
  box-shadow: none;
}

.cfp-cta .btn:hover {
  color: var(--teal-deep);
  background: #fff;
}

.problem-grid {
  display: grid;
  gap: 1.5rem;
}

.problem-grid article {
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.problem-grid h3 {
  font-size: 1.4rem;
  color: var(--ink);
}

.problem-grid p {
  color: var(--muted);
  margin: 0;
}

.site-footer {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto 2.5rem;
  padding: 2.5rem var(--page-pad) 1.5rem;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  box-sizing: border-box;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
}

.footer-neurips {
  display: inline-block;
  opacity: 0.9;
  transition: opacity 0.2s ease;
}

.footer-neurips:hover,
.footer-neurips:focus {
  opacity: 1;
}

.footer-neurips img {
  display: block;
  height: clamp(4.5rem, 8vw, 6.5rem);
  width: auto;
}

.footer-tagline {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 0.85rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.55rem;
}

.footer-col li {
  color: var(--ink-soft);
  font-size: 0.94rem;
  display: flex;
  gap: 0.5rem;
  align-items: baseline;
}

.footer-col a {
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-col a:hover,
.footer-col a:focus {
  color: var(--teal-deep);
  text-decoration: underline;
  text-decoration-color: var(--gold-soft);
}

.footer-date {
  min-width: 5.5rem;
  color: var(--ink);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

@media (min-width: 720px) {
  .site-footer {
    grid-template-columns: minmax(12rem, 1.4fr) repeat(2, minmax(0, 1fr));
    grid-template-areas:
      "brand submissions contact"
      "dates dates dates";
    align-items: start;
    gap: 2rem 2.5rem;
  }

  .footer-brand { grid-area: brand; }
  .footer-submissions { grid-area: submissions; }
  .footer-contact { grid-area: contact; }
  .footer-dates { grid-area: dates; }

  .footer-dates ul {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem 1.5rem;
  }

  .footer-dates li {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.15rem;
  }

  .footer-dates .footer-date {
    min-width: 0;
  }
}

@media (min-width: 720px) {
  .nav {
    display: flex;
  }

  .site-header .btn-small {
    display: inline-flex;
  }

  .nav-toggle,
  .mobile-nav {
    display: none !important;
  }

  .date-rail {
    grid-template-columns: repeat(2, 1fr);
  }

  .people-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0 2rem;
  }

  .sched-row {
    grid-template-columns: 9.5rem 1fr;
    gap: 1.5rem;
    align-items: start;
  }

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

  .cfp-cta {
    grid-column: 1 / -1;
  }

  .cfp-formats {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .problem-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

@media (min-width: 960px) {
  .org-logo {
    height: 2.2rem;
    max-width: 10.5rem;
  }

  .org-logo-vector {
    height: 2.4rem;
    max-width: 13rem;
  }

  .org-logo-nvidia {
    height: 2.8rem;
  }

  .org-logo-crest {
    height: 3rem;
  }

  .about-grid {
    grid-template-columns: 1.4fr 0.9fr;
    grid-template-rows: auto 1fr;
    gap: 1.75rem 3rem;
    align-items: stretch;
  }

  .about-main {
    grid-column: 1;
    grid-row: 1;
  }

  .about-visual {
    grid-column: 1;
    grid-row: 2;
    align-self: end;
  }

  .about-aside {
    grid-column: 2;
    grid-row: 1 / -1;
    padding: 0 0 0 1.75rem;
    border-top: 0;
    border-left: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
  }

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

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

  .speakers-grid,
  .organizers-grid,
  .panel-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .people-grid.lineup {
    grid-template-columns: repeat(auto-fit, minmax(15rem, 17rem));
  }
}

.will-reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.will-reveal.is-visible {
  opacity: 1;
  transform: none;
}

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

  .orb,
  .trail,
  .node,
  .reveal,
  .btn {
    animation: none !important;
    transition: none !important;
  }

  .trail {
    stroke-dashoffset: 0;
  }

  .node,
  .reveal,
  .will-reveal {
    opacity: 1;
    transform: none;
  }
}