:root {
  --bg: #ffffff;
  --bg-soft: #eef2fb;
  --bg-page: #f2f5ff;
  --bg-page-2: #f7f9ff;
  --text: #0f172a;
  --muted: #475569;
  --border: #e5e7eb;
  --shadow: 0 10px 30px rgba(2, 6, 23, 0.08);
  --shadow-soft: 0 6px 18px rgba(2, 6, 23, 0.06);

  --accent: #5b5bd6;
  --accent-2: #0ea5e9;
  --radius: 18px;

  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 650px at 12% -10%, rgba(91, 91, 214, .12), transparent 55%), radial-gradient(900px 520px at 88% 6%, rgba(22, 163, 255, .10), transparent 60%), linear-gradient(180deg, var(--bg-page) 0%, #ffffff 55%, var(--bg-page-2) 100%);
  line-height: 1.55;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: .2px;
  color: var(--text);
}

.brand:hover {
  text-decoration: none;
}

.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(91, 91, 214, .18), rgba(14, 165, 233, .12));
  border: 1px solid rgba(91, 91, 214, .25);
  font-weight: 800;
}

.brand__text {
  font-size: 15px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav__link {
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
}

.nav__link:hover {
  color: var(--text);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: var(--shadow-soft);
  padding: 10px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  margin: 5px 0;
  border-radius: 2px;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 380px at 20% 20%, rgba(91, 91, 214, .18), transparent 60%),
    radial-gradient(700px 380px at 80% 20%, rgba(14, 165, 233, .14), transparent 60%),
    linear-gradient(180deg, rgba(246, 247, 251, 1), rgba(255, 255, 255, 1));
}

.hero__bg::before {
  content: "";
  position: absolute;
  inset: -30px;
  background-image: url("assets/ai-neural.webp");
  background-size: cover;
  background-position: center;
  opacity: .18;
  filter: saturate(1.08) contrast(1.12);
}

.hero-inner {
  position: relative;
  padding: 64px 0 46px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: start;
}

.kicker {
  display: inline-block;
  margin: 0 0 10px;
  font-weight: 700;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: .18em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 12px;
  font-size: 44px;
  line-height: 1.1;
  letter-spacing: -.02em;
}

.lede {
  margin: 0 0 18px;
  color: var(--muted);
  max-width: 64ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 22px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 16px;
  border-radius: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  user-select: none;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 22px rgba(91, 91, 214, .22);
}

.btn-primary:hover {
  filter: brightness(.98);
}

.btn-secondary {
  background: #fff;
  border-color: rgba(91, 91, 214, .28);
  color: var(--accent);
}

.btn-secondary:hover {
  background: rgba(91, 91, 214, .06);
}

.btn-ghost {
  background: #fff;
  border-color: var(--border);
  color: var(--text);
}

.btn-ghost:hover {
  background: rgba(2, 6, 23, .035);
}

.btn-small {
  height: 36px;
  padding: 0 12px;
  border-radius: 12px;
  font-size: 13px;
}

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

.meta-chip {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, .78);
  border-radius: 16px;
  padding: 10px 12px;
  min-width: 190px;
}

.meta-chip__label {
  font-size: 12px;
  color: var(--muted);
  font-weight: 700;
  margin-bottom: 2px;
}

.meta-chip__value {
  font-weight: 700;
  color: var(--text);
}

/* Hero card */
.hero-card {
  background: rgba(255, 255, 255, .9);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.hero-card__title {
  font-weight: 800;
  margin-bottom: 10px;
}

.hero-card__item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
}

.hero-card__k {
  color: var(--muted);
  font-weight: 700;
  font-size: 13px;
}

.hero-card__v {
  font-weight: 700;
  text-align: right;
}

.hero-card__divider {
  height: 1px;
  background: var(--border);
  margin: 10px 0 14px;
}

.hero-card__cta {
  width: 100%;
}

/* Sections */
.section {
  padding: 58px 0;
  position: relative;
  overflow: hidden;
}

.section-soft {
  --section-bg-image: none;
  --section-tint: rgba(2, 132, 199, 0.14);

  background-image:
    radial-gradient(1200px 520px at 10% 0%,
      rgba(255, 255, 255, 0.48) 0%,
      rgba(255, 255, 255, 0.08) 46%,
      rgba(255, 255, 255, 0.00) 74%),
    linear-gradient(180deg,
      var(--section-tint) 0%,
      rgba(255, 255, 255, 0.08) 46%,
      rgba(255, 255, 255, 0.60) 100%),
    var(--section-bg-image);

  background-size: auto, auto, cover;
  background-position: top left, top, center;
  background-repeat: no-repeat;
  background-color: var(--bg-soft);

  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}


/* Section-specific backgrounds (darker + distinct per section) */
#about.section-soft {
  --section-bg-image: url("assets/bg/bg-about.webp");
  --section-tint: rgba(37, 99, 235, 0.16);
}

#schedule.section-soft {
  --section-bg-image: url("assets/bg/bg-schedule.webp");
  --section-tint: rgba(16, 185, 129, 0.16);
}

#speakers.section-soft {
  --section-bg-image: url("assets/bg/bg-speakers.webp");
  --section-tint: rgba(245, 158, 11, 0.15);
}

#people.section-soft {
  --section-bg-image: url("assets/bg/bg-people.webp");
  /* Warm, lighter tint so the People section reads clearly on top of the new AI-themed background */
  /* Use a paler, brighter yellow tint to keep the background slightly lighter */
  /* Make the background a bit lighter so the header text pops more */
  --section-tint: rgba(255, 251, 235, 0.38);
}

#venue.section-soft {
  --section-bg-image: url("assets/bg/bg-venue.webp");
  --section-tint: rgba(56, 189, 248, 0.16);
}

#contact.section-soft {
  --section-bg-image: url("assets/bg/bg-contact.webp");
  --section-tint: rgba(100, 116, 139, 0.17);
}

/* People section header readability (title + small helper text) */
#people .section-head h2 {
  color: rgba(15, 23, 42, 0.92);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.35);
}

#people .section-head .subhead {
  color: rgba(15, 23, 42, 0.70);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.35);
}


.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.section-head h2 {
  margin: 0;
}

.section-head__right {
  display: flex;
  gap: 12px;
  align-items: center;
}

h2 {
  font-size: 30px;
  letter-spacing: -.01em;
}

h3 {
  margin: 0 0 8px;
}

.subhead {
  margin: 6px 0 0;
  color: var(--muted);
  max-width: 70ch;
}

.prose p {
  margin: 10px 0;
  color: var(--text);
}

.note {
  color: var(--muted);
  background: rgba(14, 165, 233, .08);
  border: 1px solid rgba(14, 165, 233, .18);
  padding: 12px 14px;
  border-radius: 16px;
}

/* Controls */
.controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 14px 0 18px;
}

.input {
  flex: 1 1 320px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid var(--border);
  padding: 0 14px;
  outline: none;
  font-size: 14px;
  background: #fff;
}

.input:focus {
  border-color: rgba(91, 91, 214, .45);
  box-shadow: 0 0 0 4px rgba(91, 91, 214, .12);
}

.chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.chip {
  height: 38px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--muted);
  cursor: pointer;
  font-weight: 700;
  font-size: 13px;
}

.chip.is-active {
  border-color: rgba(91, 91, 214, .45);
  background: rgba(91, 91, 214, .10);
  color: var(--text);
}

/* Schedule list */
.schedule-list {
  display: grid;
  gap: 12px;
}

.schedule-item {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: #fff;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.schedule-item summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 14px;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "time tag"
    "title tag";
  column-gap: 12px;
  row-gap: 6px;
  align-items: start;
}

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

.schedule-item summary:hover {
  background: rgba(91, 91, 214, .035);
}

.schedule-item[open] summary {
  background: rgba(91, 91, 214, .05);
}

.schedule-time {
  grid-area: time;
  font-weight: 800;
  color: var(--text);
  white-space: nowrap;
  font-size: 14px;
  letter-spacing: -.01em;
}

.schedule-title {
  grid-area: title;
  font-weight: 800;
  min-width: 0;
}

.schedule-tag {
  grid-area: tag;
  font-weight: 800;
  font-size: 12px;
  color: var(--accent);
  border: 1px solid rgba(91, 91, 214, .25);
  background: rgba(91, 91, 214, .08);
  padding: 6px 10px;
  border-radius: 999px;
  white-space: nowrap;
  justify-self: end;
}

@media (max-width: 640px) {
  .schedule-item summary {
    grid-template-columns: 1fr;
    grid-template-areas:
      "time"
      "title"
      "tag";
  }

  .schedule-time {
    white-space: normal;
  }

  .schedule-tag {
    justify-self: start;
  }
}

.schedule-meta {
  padding: 0 14px 12px;
  color: var(--muted);
  font-weight: 600;
  font-size: 13px;
}

.schedule-details {
  padding: 0 14px 16px;
  color: var(--text);
}

.schedule-details .muted {
  color: var(--muted);
}

/* Grid + cards */
.grid {
  display: grid;
  gap: 14px;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-people {
  /* Optional helper grid for People; default kept at 3 to match the site layout */
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 16px;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-weight: 800;
  font-size: 12px;
  white-space: nowrap;
}

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

.small {
  font-size: 13px;
}

.person {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.person__top {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  /* keep avatars aligned even when text wraps */
}

/* Prevent long names/affiliations from pushing the badge outside the card */
.person__top > div {
  flex: 1 1 auto;
  min-width: 0;
}

.person__name,
.person__meta {
  overflow-wrap: anywhere;
}

.person .badge {
  flex: 0 0 auto;
}

.avatar {
  width: 112px;
  height: 112px;
  border-radius: 20px;
  object-fit: contain;
  object-position: center;
  background: #f5f5f5;
  border: 1px solid rgba(2, 6, 23, .08);
  flex: 0 0 auto;
  align-self: flex-start;
}

.person__name {
  font-weight: 800;
  line-height: 1.2;
}

.person__meta {
  color: var(--muted);
  font-weight: 600;
  font-size: 13px;
  margin-top: 2px;
}

.person .badge {
  margin-left: auto;
}

.person__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.person__link {
  font-weight: 800;
  font-size: 13px;
}

.person__bio {
  color: var(--text);
  font-size: 14px;
}

.person__more {
  width: max-content;
  background: transparent;
  border: 0;
  color: var(--accent);
  font-weight: 800;
  cursor: pointer;
  padding: 0;
}

.speaker__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.speaker__name {
  font-weight: 900;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.speaker__profile-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.speaker__profile-link:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}


.speaker__role {
  color: var(--muted);
  font-weight: 600;
  font-size: 13px;
  margin-top: 2px;
}

.speaker__talk {
  margin: 10px 0 8px;
  font-weight: 800;
}

.speaker__abstract {
  margin: 0;
  color: var(--text);
  font-size: 14px;
}

.speaker__more {
  margin-top: 10px;
  width: max-content;
  background: transparent;
  border: 0;
  color: var(--accent);
  font-weight: 800;
  cursor: pointer;
  padding: 0;
}

/* Venue + contact */
.venue-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.venue-card {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 16px;
}

.list {
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--text);
}

.meeting-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
  flex-wrap: wrap;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 13px;
  color: var(--text);
  padding: 8px 10px;
  background: rgba(2, 6, 23, .04);
  border: 1px solid rgba(2, 6, 23, .08);
  border-radius: 12px;
}

.contact-card {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 18px 22px;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.footnote {
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}


.venue-note {
  margin: 0 0 6px;
}

.venue-note:last-of-type {
  margin-bottom: 0;
}

#contact .section-head {
  justify-content: center;
  text-align: center;
}

#contact .section-head .subhead {
  margin-left: auto;
  margin-right: auto;
}

.contact-card {
  justify-content: center;
  text-align: center;
  flex-direction: column;
  gap: 10px;
}

.contact-person,
.contact-email {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.footnote {
  text-align: center;
}

/* Back to top */
.to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
  transform: translateY(6px);
  font-weight: 900;
}

.to-top.is-show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 1180px) {
  .grid-people {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  h1 {
    font-size: 36px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
  }

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

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

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

@media (max-width: 720px) {
  .nav-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    top: 64px;
    right: 20px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: 10px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    min-width: 210px;
  }

  .nav.is-open {
    display: flex;
  }

  .nav__link {
    padding: 10px 10px;
    border-radius: 12px;
  }

  .nav__link:hover {
    background: rgba(2, 6, 23, .04);
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

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

  .schedule-item summary {
    grid-template-columns: 1fr;
  }

  .schedule-tag {
    justify-self: start;
  }
}


/* =========================
   Online strip + footer
   ========================= */

.online-strip {
  background: #fff;
  border-bottom: 1px solid var(--border);
}

.online-strip__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: center;
  padding: 10px 0;
  text-align: center;
}

.online-strip__label {
  font-weight: 700;
  color: var(--muted);
}

.online-strip__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 26px;
  padding: 0 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  box-shadow: 0 8px 18px rgba(91, 91, 214, .22);
}

.online-strip__link {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.online-strip__link--highlight {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 999px;
  background: rgba(91, 91, 214, .10);
  border: 1px solid rgba(91, 91, 214, .24);
  color: var(--accent);
  font-weight: 800;
  font-size: 15px;
  text-decoration: none;
  box-shadow: 0 10px 24px rgba(2, 6, 23, .08);
}

.online-strip__link--highlight:hover {
  text-decoration: none;
  background: rgba(91, 91, 214, .16);
  color: #4338ca;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: #fff;
  padding: 22px 0;
}

.footer-inner {
  display: flex;
  gap: 18px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  flex-direction: column;
  text-align: center;
}

.footer-brand {
  font-weight: 800;
}

.footer-left,
.footer-right {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.footer-online {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* =========================
   Subtle side AI backgrounds (no text overlap)
   ========================= */
.section-sides {
  position: relative;
  overflow: hidden;
}

.section-sides>.container {
  position: relative;
  z-index: 1;
}

.section-sides::before,
.section-sides::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 560px;
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  opacity: .14;
  /* make visible */
  pointer-events: none;
  z-index: 0;
  filter: saturate(1.05) contrast(1.02);
}

.section-sides::before {
  /* fade toward the content */
  mask-image: linear-gradient(to right, rgba(0, 0, 0, .95), rgba(0, 0, 0, 0));
  -webkit-mask-image: linear-gradient(to right, rgba(0, 0, 0, .95), rgba(0, 0, 0, 0));
}

.section-sides::after {
  mask-image: linear-gradient(to left, rgba(0, 0, 0, .95), rgba(0, 0, 0, 0));
  -webkit-mask-image: linear-gradient(to left, rgba(0, 0, 0, .95), rgba(0, 0, 0, 0));
}

.section-sides--agenda::before {
  left: -280px;
  background-image: url("assets/ai-neural.webp");
  opacity: .13;
}

.section-sides--agenda::after {
  right: -280px;
  background-image: url("assets/ai-neural.webp");
  opacity: .13;
  transform: scaleX(-1);
}

.section-sides--people::before {
  left: -300px;
  background-image: url("assets/llm-ai-gettyimages-2149059417.webp");
  opacity: .12;
}

.section-sides--people::after {
  right: -300px;
  background-image: url("assets/llm-ai-gettyimages-2149059417.webp");
  opacity: .12;
  transform: scaleX(-1);
}

/* Make the hero background slightly richer */
.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(900px 420px at 40% 0%, rgba(91, 91, 214, .14), transparent 60%),
    radial-gradient(900px 420px at 80% 10%, rgba(14, 165, 233, .10), transparent 60%);
  pointer-events: none;
}


.section-sides--speakers::before {
  left: -360px;
  background-image: url("assets/llm-001-da6e9df83e520a18f43984ad5118b9a7.png");
  opacity: .12;
}

.section-sides--speakers::after {
  right: -360px;
  background-image: url("assets/ai-neural.webp");
  opacity: .11;
  transform: scaleX(-1);
}

.section-sides--venue::before {
  left: -360px;
  background-image: url("assets/ai-chip.avif");
  opacity: .12;
}

.section-sides--venue::after {
  right: -360px;
  background-image: url("assets/ai-tunnel.avif");
  opacity: .11;
  transform: scaleX(-1);
}

.section-sides--contact::before {
  left: -360px;
  background-image: url("assets/ai-silhouette.png");
  opacity: .11;
}

.section-sides--contact::after {
  right: -360px;
  background-image: url("assets/llm-ai-gettyimages-2149059417.webp");
  opacity: .10;
  transform: scaleX(-1);
}


/* =========================
   Hero collage (accessibility-cv style)
========================= */
.hero.hero-collage {
  position: relative;
  min-height: 72vh;
  padding: 0;
  overflow: hidden;
  border-bottom: 1px solid rgba(0, 0, 0, .08);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero.hero-collage .container {
  position: relative;
}

.hero-collage__grid {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 12px;
  padding: 14px;
  background: #070a12;
}

.hero-tile {
  border-radius: 20px;
  background-position: center;
  background-size: cover;
  box-shadow: 0 18px 40px rgba(0, 0, 0, .35);
  filter: saturate(1.05) contrast(1.06);
  transform: scale(1.01);
}

.hero-tile--1 {
  background-image: url("assets/llm-ai-gettyimages-2149059417.webp");
}

.hero-tile--2 {
  background-image: url("assets/ai-neural.webp");
}

.hero-tile--3 {
  background-image: url("assets/llm-001-da6e9df83e520a18f43984ad5118b9a7.png");
}

.hero-tile--4 {
  background-image: url("assets/ai-chip.avif");
}

.hero-collage__overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(1000px 500px at 50% 40%, rgba(17, 24, 39, .25), rgba(17, 24, 39, .85)),
    linear-gradient(to bottom, rgba(0, 0, 0, .25), rgba(0, 0, 0, .78));
}

.hero-collage__content {
  position: relative;
  padding: 86px 0 74px;
  text-align: center;
  color: #fff;
}

.hero-kicker {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .18);
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
  font-size: 16px;
}

.hero-collage__content h1 {
  margin: 18px auto 0;
  max-width: 1060px;
  font-size: clamp(34px, 4.5vw, 58px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-shadow: 0 6px 24px rgba(0, 0, 0, .55);
}

.hero-subtitle {
  margin: 14px auto 0;
  max-width: 920px;
  font-size: 18px;
  color: rgba(255, 255, 255, .86);
  text-shadow: 0 6px 18px rgba(0, 0, 0, .45);
}

.hero-info {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 18px;
  color: rgba(255, 255, 255, .92);
  text-shadow: 0 6px 18px rgba(0, 0, 0, .45);
}

.hero-info__line .sep {
  display: inline-block;
  margin: 0 10px;
  opacity: .75;
}

.hero-info__line .tz {
  font-weight: 900;
  letter-spacing: .02em;
}

.hero-pills {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(0, 0, 0, .55);
  border: 1px solid rgba(255, 255, 255, .18);
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  font-size: 13px;
  letter-spacing: .01em;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}

.hero-pill:hover {
  background: rgba(0, 0, 0, .75);
  border-color: rgba(255, 255, 255, .28);
  transform: translateY(-1px);
}

@media (max-width: 720px) {
  .hero.hero-collage {
    min-height: 64vh;
  }

  .hero-collage__content {
    padding: 72px 0 60px;
  }

  .hero-info {
    font-size: 16px;
  }
}

/* =========================
   Agenda layout fixes
========================= */
.schedule-item summary {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  position: relative;
  padding-right: 44px;
}

.schedule-left {
  flex: 0 0 260px;
  min-width: 220px;
}

.schedule-main {
  flex: 1 1 auto;
  min-width: 0;
}

.schedule-time {
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.time-line {
  display: block;
}

.time-line--secondary {
  margin-top: 4px;
  font-weight: 800;
  font-size: 13px;
  color: var(--muted);
}

.schedule-title-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  justify-content: space-between;
}

.schedule-tag {
  margin-left: 12px;
}

.schedule-meta {
  margin-top: 8px;
  color: var(--muted);
  font-weight: 650;
}

.schedule-hint {
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted);
  display: flex;
  gap: 8px;
  align-items: center;
}

.hint-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
  opacity: .85;
  flex: 0 0 auto;
}

.schedule-item summary::after {
  content: "▾";
  position: absolute;
  right: 16px;
  top: 18px;
  font-size: 14px;
  color: var(--muted);
}

details[open].schedule-item summary::after {
  content: "▴";
}

.schedule-details {
  white-space: pre-wrap;
}

@media (max-width: 820px) {
  .schedule-left {
    flex-basis: 240px;
  }
}

@media (max-width: 720px) {
  .schedule-item summary {
    flex-direction: column;
    padding-right: 40px;
  }

  .schedule-left {
    width: 100%;
    flex-basis: auto;
  }

  .schedule-item summary::after {
    top: 14px;
  }
}



/* =========================
   Header: center nav (no logo)
   ========================= */
.header-inner {
  justify-content: center;
  position: relative;
}

.nav {
  flex: 1;
  justify-content: center;
}

.nav-toggle {
  position: absolute;
  right: 0;
}

/* =========================
   About section background + layout
   ========================= */
.section-about {
  position: relative;
  overflow: hidden;
}



/* About / Workshop Background: image backdrop (darker) + strong text clarity */
.section-about {
  position: relative;
  overflow: hidden;
}

.section-about::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("assets/workshop-background.avif");
  background-size: cover;
  background-position: center;
  transform: scale(1.06);
  filter: saturate(1.08) contrast(1.12) brightness(0.72);
  opacity: 1;
  pointer-events: none;
}

.section-about::after {
  content: "";
  position: absolute;
  inset: 0;
  /* dark veil so the image looks "deeper" but cards remain readable */
  background:
    radial-gradient(60% 60% at 15% 20%, rgba(2, 6, 23, .25) 0%, rgba(2, 6, 23, 0) 60%),
    linear-gradient(180deg, rgba(2, 6, 23, .55) 0%, rgba(2, 6, 23, .35) 40%, rgba(2, 6, 23, .55) 100%);
  pointer-events: none;
}

.section-about .container {
  position: relative;
  z-index: 1;
}

.section-about .about-title {
  color: rgba(248, 250, 252, .96);
  text-shadow: 0 2px 18px rgba(0, 0, 0, .45);
}

.section-about .about-lead {
  background: rgba(255, 255, 255, .92);
}

.section-about .about-card {
  background: rgba(255, 255, 255, .92);
}

.section-about .about-title {
  text-align: center;
  margin: 0 0 18px;
}

.section-about .about-card {
  max-width: 980px;
  margin: 0 auto;
  padding: 22px 24px;
}

.section-about .about-card .lead {
  font-weight: 600;
  margin: 0 0 14px;
}

.section-about .about-card p {
  margin: 0 0 14px;
}

.section-about .about-card p:last-child {
  margin-bottom: 0;
}


/* Keep the background mostly in the lower area so heading/intro stays crisp */

/* Strong top wash for readability + gentle vignette */
.section-about .container {
  position: relative;
  z-index: 1;
}

/* Give the About intro its own “glass” panel so text is always readable */
.section-about .prose {
  display: block;
  width: 100%;
  max-width: none;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-soft);
}

.section-about .prose p {
  margin: 0;
}

.section-about .card {
  background: rgba(255, 255, 255, 0.90);
  backdrop-filter: blur(6px);
}

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

.funding-banner {
  margin-top: 16px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-soft);
  color: var(--text);
}

.funding-banner strong {
  font-weight: 800;
}

/* Sponsors section */
.sponsors-section {
  text-align: center;
  padding: 20px 0;
}

.sponsors-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 24px;
  align-items: center;
  justify-items: center;
}

.sponsor-logo {
  width: 100%;
  max-width: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  transition: transform 0.3s ease;
}

.sponsor-logo img {
  width: 100%;
  height: auto;
  object-fit: contain;
  opacity: 0.85;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.sponsor-logo:hover img {
  opacity: 1;
  transform: scale(1.05);
}

/* Make NRC logo larger */
.sponsor-logo--nrc {
  max-width: 400px;
}


/* Responsive breakpoints for sponsors */
@media (max-width: 980px) {
  .sponsors-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (max-width: 640px) {
  .sponsors-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .sponsor-logo {
    max-width: 180px;
  }
}


@media (max-width: 720px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    right: 12px;
  }

  .section-about .prose {
    display: block;
  }
}

/* Contact person */
.contact-person,
.contact-email {
  min-width: 220px;
  max-width: 320px;
}

.contact-name {
  font-weight: 800;
  font-size: 18px;
  line-height: 1.15;
  margin-top: 4px;
}

.contact-role {
  margin-top: 4px;
}

/* =========================
   PDF export (Schedule)
   ========================= */

.pdf-root {
  position: fixed;
  left: -10000px;
  top: 0;
  width: 794px;
  /* A4-ish at ~96dpi */
  padding: 0;
  background: transparent;
  color: #0f172a;
  z-index: -1;
}

.pdf-pages {
  display: block;
}

.pdf-page {
  width: 794px;
  height: 1123px;
  /* A4-ish at ~96dpi */
  background: #ffffff;
  overflow: hidden;
  margin: 0 0 16px;
}

.pdf-page-inner {
  height: 100%;
  padding: 36px 40px;
}


.pdf-root * {
  box-sizing: border-box;
}

.pdf-header {
  padding-bottom: 16px;
  margin-bottom: 18px;
  border-bottom: 2px solid rgba(2, 6, 23, 0.08);
}

.pdf-kicker {
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 11px;
  color: #475569;
}

.pdf-title {
  margin: 10px 0 8px;
  font-size: 28px;
  letter-spacing: -0.02em;
}

.pdf-meta {
  color: #334155;
  font-weight: 650;
  font-size: 12.5px;
  line-height: 1.45;
}

.pdf-section-title {
  font-size: 18px;
  margin: 18px 0 10px;
  letter-spacing: -0.01em;
}

.pdf-page-inner>.pdf-section-title {
  margin-top: 0;
}

.pdf-bg p {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.6;
}

.pdf-schedule-item {
  border: 1px solid rgba(2, 6, 23, 0.11);
  border-radius: 14px;
  padding: 13px 15px;
  margin: 0 0 12px;
}

.pdf-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}

.pdf-time {
  font-weight: 900;
  font-size: 13px;
  line-height: 1.3;
}

.pdf-type {
  font-weight: 900;
  font-size: 11px;
  color: #4f46e5;
  border: 1px solid rgba(79, 70, 229, 0.28);
  background: rgba(79, 70, 229, 0.08);
  padding: 4px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

.pdf-item-title {
  margin: 8px 0 4px;
  font-weight: 900;
  font-size: 15px;
  line-height: 1.25;
}

.pdf-item-meta {
  margin: 0 0 8px;
  color: #475569;
  font-weight: 650;
  font-size: 12.5px;
  line-height: 1.45;
}

.pdf-item-mode {
  color: #334155;
  font-weight: 800;
}

.pdf-item-speakers {
  margin-top: 2px;
}

.pdf-item-details {
  white-space: pre-wrap;
  font-size: 12.5px;
  line-height: 1.55;
  color: #0f172a;
}

.pdf-footer {
  margin-top: 18px;
  padding-top: 10px;
  border-top: 1px solid rgba(2, 6, 23, 0.08);
  font-size: 11px;
  color: #64748b;
}