@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap");

:root {
  --mars-blue: #1a1a34;
  --neon-green: #89e990;
  --electro-purple: #6472e2;
  --hyper-violet: #c5a9ff;
  --neural: #9cdecf;
  --ink: #1a1a34;
  --muted: #5e6170;
  --line: #e1e2e7;
  --soft: #f5f6f8;
  --width: 920px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 17px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: "Inter", Arial, sans-serif;
  line-height: 1.65;
}

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

a:hover {
  color: #4856c5;
}

a:focus-visible {
  outline: 3px solid var(--hyper-violet);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 200;
  padding: 0.55rem 0.85rem;
  color: var(--mars-blue);
  background: var(--neon-green);
  font-weight: 700;
  transform: translateY(-170%);
}

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

.site-topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0.9rem 2rem;
  background: var(--mars-blue);
}

.topbar-inner {
  display: flex;
  width: 100%;
  max-width: var(--width);
  margin: 0 auto;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.topbar-brand {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  text-decoration: none;
}

.topbar-home {
  padding: 0.3rem 0.75rem;
  color: var(--neon-green);
  border: 1px solid rgba(137, 233, 144, 0.6);
  border-radius: 999px;
  font-family: "Plus Jakarta Sans", Arial, sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: none;
}

.topbar-home:hover {
  color: var(--mars-blue);
  background: var(--neon-green);
}

.topbar-logo {
  display: block;
  height: 1.6rem;
  flex-shrink: 0;
}

.topbar-x {
  color: rgba(137, 233, 144, 0.45);
  font-family: "Plus Jakarta Sans", Arial, sans-serif;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1;
}

.topbar-uni-logo {
  display: block;
  height: 1.8rem;
  flex-shrink: 0;
  opacity: 0.75;
}

.site-hero {
  position: relative;
  overflow: hidden;
  padding: 3rem 2rem 3.5rem;
  background: var(--mars-blue);
}

.site-hero::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 3px;
  background: var(--neon-green);
  content: "";
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 820px;
  margin: 0 auto;
}

.hero-shape {
  position: absolute;
  bottom: 0;
  width: auto;
  pointer-events: none;
  user-select: none;
}

.hero-shape-left {
  left: 0;
  height: 80%;
  opacity: 0.85;
}

.hero-shape-right {
  right: 0;
  height: 100%;
  opacity: 0.92;
}

.hero-tag,
.eyebrow {
  margin: 0 0 0.85rem;
  color: var(--electro-purple);
  font-family: "Plus Jakarta Sans", Arial, sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.4;
  text-transform: uppercase;
}

.hero-tag {
  color: var(--neon-green);
}

h1,
h2,
h3 {
  font-family: "Plus Jakarta Sans", Arial, sans-serif;
}

.site-hero h1,
.archive-hero h1 {
  margin: 0 0 0.4rem;
  color: #fff;
  font-size: clamp(2.7rem, 6vw, 4.4rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1.05;
}

.hero-subtitle {
  margin: 0 0 0.5rem;
  color: rgba(255, 255, 255, 0.76);
  font-family: "Plus Jakarta Sans", Arial, sans-serif;
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 500;
}

.hero-meta {
  margin: 0;
  color: rgba(255, 255, 255, 0.43);
  font-size: 0.86rem;
}

.section-nav {
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.section-nav-inner {
  display: flex;
  max-width: var(--width);
  margin: 0 auto;
  padding: 0 1.5rem;
  gap: 0.25rem 1.8rem;
}

.section-nav a {
  padding: 0.85rem 0;
  color: var(--ink);
  font-family: "Plus Jakarta Sans", Arial, sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
}

.section-nav a:hover,
.section-nav a[aria-current="page"] {
  color: var(--electro-purple);
}

.facts,
.content-section,
.two-column,
.footer-inner,
.archive-main {
  max-width: var(--width);
  margin-inline: auto;
}

.facts {
  padding: 2rem 1.5rem 0;
}

.facts dl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.facts dl div {
  padding: 1.1rem 1.3rem;
  border-right: 1px solid var(--line);
}

.facts dl div:first-child {
  padding-left: 0;
}

.facts dl div:last-child {
  border-right: 0;
}

.facts dt {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.facts dd {
  margin: 0.15rem 0 0;
  font-weight: 600;
}

.content-section {
  padding: 4.5rem 1.5rem;
}

.section-heading {
  margin-bottom: 2rem;
}

h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
}

h3 {
  margin: 0;
  font-size: 1.03rem;
  line-height: 1.4;
}

.notice {
  display: grid;
  grid-template-columns: 5px minmax(0, 1fr);
  gap: 1.25rem;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 8px 28px rgba(26, 26, 52, 0.05);
}

.notice-marker {
  border-radius: 1rem;
  background: var(--neon-green);
}

.notice h3 {
  margin-bottom: 0.25rem;
  font-size: 1.15rem;
}

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

.schedule-columns,
.event-row {
  display: grid;
  grid-template-columns: 8rem minmax(11rem, 0.65fr) minmax(15rem, 1.35fr);
  gap: 1.6rem;
}

.schedule-columns {
  align-items: start;
  margin-top: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--electro-purple);
  color: var(--mars-blue);
  font-size: 0.9rem;
  font-weight: 650;
}

.schedule-hint {
  display: block;
  margin-top: 0.2rem;
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 400;
}

.event-row {
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--line);
}

.event-row time {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}

.event-row time span {
  display: block;
  font-size: 0.88rem;
}

.event-row h3,
.event-row p {
  margin: 0;
}

.event-speaker p {
  color: var(--muted);
  font-size: 0.9rem;
}

.event-title {
  font-weight: 500;
}

.event-row .event-abstract {
  margin-top: 0.3rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.tinted-section {
  padding-inline: 1.5rem;
  background: var(--soft);
}

.two-column {
  display: grid;
  grid-template-columns: minmax(14rem, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(3rem, 8vw, 6rem);
  padding-block: 4.5rem;
}

.prose {
  font-size: 1.02rem;
}

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

.text-link {
  font-weight: 600;
}

.detail-list > div {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 1.2rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--line);
}

.detail-list > div:last-child {
  border-bottom: 1px solid var(--line);
}

.detail-list p {
  margin: 0;
  color: var(--muted);
}

footer {
  color: rgba(255, 255, 255, 0.68);
  background: var(--mars-blue);
}

.footer-inner {
  display: flex;
  min-height: 6rem;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  gap: 2rem;
}

.footer-inner p {
  margin: 0;
}

.footer-inner a {
  color: var(--neon-green);
}

.archive-hero {
  position: relative;
  padding: 3.5rem 1.5rem 4rem;
  background: var(--mars-blue);
}

.archive-hero::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 3px;
  background: var(--neon-green);
  content: "";
}

.archive-hero-inner {
  max-width: var(--width);
  margin: 0 auto;
}

.archive-main {
  padding: 4rem 1.5rem 6rem;
}

.archive-year {
  margin-top: 1rem;
}

.archive-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--mars-blue);
  gap: 2rem;
}

.archive-intro {
  margin: 0 0 1.2rem;
  color: var(--muted);
}

.archive-list article {
  display: grid;
  grid-template-columns: minmax(7rem, 0.26fr) minmax(0, 1fr);
  gap: 2rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line);
}

.archive-list time {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.archive-list h3,
.archive-list p {
  margin: 0;
}

.archive-affiliation {
  color: var(--muted);
  font-size: 0.92rem;
}

.archive-list details {
  margin-top: 0.65rem;
}

.archive-list summary,
.event-details summary {
  color: var(--mars-blue);
  font-weight: 650;
  line-height: 1.4;
  cursor: pointer;
}

.archive-list summary::marker,
.event-details summary::marker {
  color: var(--electro-purple);
}

.archive-details {
  max-width: 50rem;
  padding: 0.8rem 0 0.4rem 1rem;
  border-left: 2px solid var(--neon-green);
}

.archive-details h4 {
  margin: 0 0 0.35rem;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.archive-details p {
  margin-bottom: 0.65rem;
  color: var(--ink);
  font-size: 0.96rem;
}

.archive-details .archive-event-meta {
  color: var(--muted);
  font-size: 0.88rem;
}

.archive-details a {
  font-size: 0.9rem;
  font-weight: 600;
}

.archive-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 1.15rem;
}

.archive-links .video-link {
  display: inline-block;
  padding: 0.22rem 0.65rem;
  color: var(--mars-blue);
  border: 1px solid var(--electro-purple);
  border-radius: 999px;
  text-decoration: none;
}

.archive-links .video-link:hover {
  color: #fff;
  background: var(--electro-purple);
}

.archive-references {
  margin: 1rem 0 0;
  padding-left: 1.25rem;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.archive-references li + li {
  margin-top: 0.45rem;
}

.archive-missing {
  margin-top: 0.65rem !important;
  color: var(--muted);
  font-size: 0.92rem;
  font-style: italic;
}

@media (max-width: 760px) {
  .hero-shape {
    opacity: 0.32;
  }

  .section-nav-inner {
    overflow-x: auto;
  }

  .facts dl,
  .two-column {
    grid-template-columns: 1fr;
  }

  .facts dl div,
  .facts dl div:first-child {
    padding: 0.8rem 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .facts dl div:last-child {
    border-bottom: 0;
  }

  .two-column {
    gap: 2rem;
  }

  .event-row {
    grid-template-columns: 7rem minmax(0, 1fr);
  }

  .schedule-columns {
    display: block;
  }

  .schedule-column-label {
    display: none;
  }

  .schedule-hint {
    margin-top: 0;
  }

  .event-details {
    grid-column: 2;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 0.4rem;
  }
}

@media (max-width: 480px) {
  .site-topbar {
    padding-inline: 1rem;
  }

  .topbar-logo {
    height: 1.35rem;
  }

  .topbar-uni-logo {
    height: 1.5rem;
  }

  .site-hero {
    padding: 2.6rem 1.25rem 3rem;
  }

  .hero-shape-left {
    left: -3rem;
  }

  .hero-shape-right {
    right: -3rem;
  }

  .section-nav-inner {
    padding-inline: 1rem;
    gap: 1.25rem;
  }

  .content-section,
  .facts,
  .tinted-section,
  .archive-main {
    padding-inline: 1rem;
  }

  .detail-list > div,
  .archive-list article,
  .event-row {
    grid-template-columns: 1fr;
    gap: 0.3rem;
  }

  .event-details {
    grid-column: 1;
  }

  .archive-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }
}

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