/* ============ Minimal modern theme (system fonts) ============ */
:root{
  --bg: #0b0d12;
  --bg2: #0f1420;
  --card: rgba(255,255,255,.06);
  --card2: rgba(255,255,255,.09);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.68);
  --line: rgba(255,255,255,.12);
  --shadow: 0 12px 32px rgba(0,0,0,.35);
  --radius: 18px;

  --brand: #7cf7c6;
  --brand2: #8bb7ff;

  --maxw: 1120px;
  --pad: clamp(16px, 4vw, 28px);
  --gap: clamp(12px, 2vw, 18px);

  --ease: cubic-bezier(.2,.8,.2,1);
}

@media (prefers-color-scheme: light){
  :root{
    --bg: #f7f8fb;
    --bg2: #ffffff;
    --card: rgba(0,0,0,.05);
    --card2: rgba(0,0,0,.08);
    --text: rgba(10,12,18,.92);
    --muted: rgba(10,12,18,.62);
    --line: rgba(10,12,18,.12);
    --shadow: 0 10px 26px rgba(0,0,0,.12);
    --brand: #0ea97a;
    --brand2: #2f6bff;
  }
}

@media (min-width: 1000px){
  #tracks .grid-2{
    grid-template-columns: repeat(3, 1fr);
  }
}

html { scroll-behavior: smooth; }
* { box-sizing: border-box; }
body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 700px at 20% -10%, rgba(124,247,198,.18), transparent 55%),
              radial-gradient(1000px 700px at 90% 10%, rgba(139,183,255,.16), transparent 55%),
              linear-gradient(180deg, var(--bg), var(--bg2));
  line-height: 1.5;
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 3px; }
p{ margin: 0.6rem 0; }
strong{ font-weight: 700; }

.container{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.skip-link{
  position: absolute;
  left: -999px;
  top: 10px;
  background: var(--bg2);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  z-index: 9999;
}
.skip-link:focus{ left: 12px; }

/* ============ Header (locked) ============ */
.site-header{
  position: sticky;
  top: 0;
  z-index: 1000;
  background: color-mix(in srgb, var(--bg2) 72%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
  padding: 12px 0;
}

.brand{
  display: flex;
  gap: 10px;
  align-items: center;
  min-width: 200px;
}
.brand-mark{
  width: 36px; height: 36px;
  border-radius: 12px;
  background:
    radial-gradient(circle at 30% 30%, rgba(255,255,255,.35), transparent 55%),
    linear-gradient(135deg, var(--brand), var(--brand2));
  box-shadow: 0 10px 20px rgba(0,0,0,.18);
}
.brand-text{ display: grid; line-height: 1.05; }
.brand-sub{ font-size: 12px; color: var(--muted); margin-top: 2px; }

.nav{
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-toggle{
  display: none;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 12px;
}
.nav-links{
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.nav-links a{
  padding: 8px 10px;
  border-radius: 12px;
  color: var(--muted);
  text-decoration: none;
}
.nav-links a:hover{
  background: color-mix(in srgb, var(--card) 85%, transparent);
  color: var(--text);
}
.nav-links a.active{
  background: color-mix(in srgb, var(--card2) 90%, transparent);
  color: var(--text);
  border: 1px solid var(--line);
}

.header-actions{
  display: flex;
  align-items: center;
  gap: 10px;
}
.mode-toggle{
  display: inline-flex;
  gap: 8px;
  align-items: center;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 12px;
}
.mode-label{ font-size: 13px; color: var(--muted); }

.scroll-progress{
  height: 2px;
  background: transparent;
}
.scroll-progress span{
  display: block;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--brand), var(--brand2));
  opacity: .8;
}



/* ============ Dismissible announcement banner ============ */
.announcement-bar{
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg,
      color-mix(in srgb, var(--brand) 20%, var(--bg2)),
      color-mix(in srgb, var(--brand2) 18%, var(--bg2)));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.06);
}
.announcement-inner{
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  padding: 8px 0;
}
.announcement-label{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.14);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text);
}
.announcement-viewport{
  position: relative;
  overflow: hidden;
  min-width: 0;
}
.announcement-track{
  display: inline-block;
  white-space: nowrap;
  padding-right: 40px;
  will-change: transform;
}
.announcement-track.is-animating{
  animation: announcement-marquee 10s linear 1;
}
.announcement-text{
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--text);
}
.announcement-close{
  width: 38px;
  height: 38px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.08);
  color: var(--text);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  transition: transform .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
}
.announcement-close:hover{
  transform: scale(1.04);
  background: rgba(255,255,255,.14);
  border-color: rgba(255,255,255,.24);
}
.announcement-close:focus-visible{
  outline: 2px solid color-mix(in srgb, var(--brand2) 70%, white 30%);
  outline-offset: 2px;
}
.announcement-reopen[hidden]{
  display: none !important;
}
.announcement-reopen{
  
  
  
  
  width: 40px;
  height: 40px;
  
  place-items: center;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--brand2) 35%, var(--line));
  border-radius: 999px;
  background:
    radial-gradient(circle at 30% 30%, rgba(255,255,255,.24), transparent 55%),
    linear-gradient(135deg, color-mix(in srgb, var(--card) 86%, #fff 14%), var(--card2));
  color: #fff;
  box-shadow: 0 14px 28px rgba(0,0,0,.24);
  cursor: pointer;
  z-index: 1100;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), filter .18s var(--ease);
}
.announcement-reopen:hover{
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 18px 34px rgba(0,0,0,.28);
  filter: saturate(1.04);
}
.announcement-reopen:focus-visible{
  outline: 2px solid color-mix(in srgb, var(--brand2) 70%, white 30%);
  outline-offset: 3px;
}
.announcement-reopen-icon{
  font-size: 22px;
  line-height: 1;
}
@keyframes announcement-marquee{
  0%{ transform: translateX(100%); }
  100%{ transform: translateX(-100%); }
}

/* ============ Buttons ============ */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--card);
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
  transition: transform .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
}
.btn:hover{ transform: translateY(-1px); text-decoration: none; }
.btn:active{ transform: translateY(0); }
.btn-primary{
  background: linear-gradient(135deg, color-mix(in srgb, var(--brand) 82%, #fff 18%), var(--brand2));
  color: #ffffff;
  border-color: color-mix(in srgb, var(--brand2) 40%, var(--line));
}
.btn-ghost{
  background: transparent;
}
.btn-link{
  border: none;
  background: transparent;
  padding: 10px 0;
  color: var(--muted);
}
.btn-link:hover{ color: var(--text); transform: none; }
.btn-compact{ padding: 10px 12px; border-radius: 12px; }

/* ============ Hero ============ */



.hero{
  position: relative;
  overflow: hidden;
  min-height: min(760px, calc(100vh - 72px));
  display: flex;
  align-items: center;
  padding: clamp(42px, 6vw, 84px) 0 68px;
  isolation: isolate;
}
.hero-bg{
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero-slide{
  position: absolute;
  inset: 0;
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;
  opacity: 0;
  transform: scale(1.035);
  transition:
    opacity 900ms ease,
    transform 7000ms ease;
  will-change: opacity, transform;
  filter: saturate(1.05) contrast(1.02);
}

.hero-slide.is-active{
  opacity: 1;
  transform: scale(1.005);
}

.hero-overlay{
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(circle at 14% 18%, rgba(174, 240, 228, .30), transparent 34%),
    radial-gradient(circle at 76% 28%, rgba(47, 107, 255, .18), transparent 28%),
    linear-gradient(180deg, rgba(6, 12, 24, .22), rgba(6, 12, 24, .52));
}

.hero::after{
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(7, 14, 28, .28) 0%, rgba(7, 14, 28, .10) 28%, rgba(7, 14, 28, .14) 100%);
}

.hero-inner{
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, .72fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

.hero-copy{
  max-width: 820px;
}


.kicker{
  display: inline-block;
  color: color-mix(in srgb, var(--text) 84%, var(--muted));
  background: color-mix(in srgb, var(--card2) 80%, transparent);
  border: 1px solid var(--line);
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 13px;
}
.hero h1{
  font-size: clamp(40px, 5vw, 64px);
  letter-spacing: -0.03em;
  margin: 10px 0 6px;
}


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

.hero-org-logos img{
  display: block;
  max-width: 100%;
  height: auto;
}



.hero-dots{
  position: absolute;
  left: 50%;
  bottom: 18px;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transform: translateX(-50%);
}

.hero-dot{
  appearance: none;
  -webkit-appearance: none;
  width: 11px;
  height: 11px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: rgba(255,255,255,.35);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.16);
  transition:
    transform .22s ease,
    background-color .22s ease,
    opacity .22s ease,
    box-shadow .22s ease;
}

.hero-dot:hover,
.hero-dot:focus-visible{
  outline: none;
  transform: scale(1.14);
  background: rgba(255,255,255,.68);
}

.hero-dot.is-active{
  background: linear-gradient(90deg, var(--brand), var(--brand2));
  box-shadow:
    0 0 0 2px rgba(255,255,255,.16),
    0 8px 20px rgba(0,0,0,.18);
}


/* Optional button refinements for hero */
.hero .btn{
  min-height: 58px;
  padding: 0 22px;
  border-radius: 18px;
  font-size: 18px;
  font-weight: 800;
}


.hero .btn-ghost{
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.12);
  color: #fff;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.hero .btn-ghost:hover,
.hero .btn-ghost:focus-visible{
  background: rgba(255,255,255,.10);
}


/* Light mode tuning if your site supports it */
@media (prefers-color-scheme: light){
  .hero-overlay{
    background:
      radial-gradient(circle at 14% 18%, rgba(174, 240, 228, .34), transparent 34%),
      radial-gradient(circle at 76% 28%, rgba(47, 107, 255, .14), transparent 28%),
      linear-gradient(180deg, rgba(255,255,255,.12), rgba(255,255,255,.42));
  }

  .hero::after{
    background:
      linear-gradient(90deg, rgba(255,255,255,.08) 0%, rgba(255,255,255,.02) 28%, rgba(255,255,255,.06) 100%);
  }
}



.lead{
  font-size: clamp(16px, 2.2vw, 20px);
  color: color-mix(in srgb, var(--text) 90%, var(--muted));
  max-width: 58ch;
}
.hero-meta{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 18px;
}
.meta-pill{
  background: color-mix(in srgb, var(--card2) 88%, transparent);
  border: 1px solid var(--line);
  padding: 10px 12px;
  border-radius: 16px;
  min-width: 180px;
}
.meta-label{ display: block; font-size: 12px; color: var(--muted); }
.meta-value{ display: block; font-weight: 700; }

.cta-row{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 10px;
}
.mini-note{
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
}

.hero-card .card{ margin-top: 8px; }

/* ============ Sections ============ */
.section{
  padding: clamp(44px, 6vw, 72px) 0;
  position: relative;
}
.section.alt{
  background:
    linear-gradient(180deg, transparent, color-mix(in srgb, var(--bg2) 70%, transparent), transparent);
}
.section::before{
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  /* opacity: .22; */
  background:
  radial-gradient(1000px 420px at 10% 30%, rgba(124,247,198,.12), transparent 55%),
  radial-gradient(900px 420px at 90% 70%, rgba(139,183,255,.10), transparent 55%),
  url("assets/hero/bg.webp") center/cover no-repeat;
  mix-blend-mode: overlay;
  filter: blur(0px) saturate(.9);
}
.section-head{
  max-width: 78ch;
  margin-bottom: 18px;
}
.section-head h2{
  font-size: clamp(26px, 3vw, 34px);
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}

/* ============ Cards / layout ============ */
.card{
  background: color-mix(in srgb, var(--card) 88%, transparent);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}
.card-title{ margin: 0 0 10px; }
.sep{
  border: none;
  border-top: 1px solid var(--line);
  margin: 16px 0;
}
.grid-2, .grid-3{
  display: grid;
  gap: var(--gap);
}
.grid-2{ grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid-3{ grid-template-columns: repeat(3, minmax(0,1fr)); }

.bullets{ margin: 10px 0 0; padding-left: 18px; color: var(--muted); }
.bullets li{ margin: 6px 0; }
.muted{ color: var(--muted); }

.link-list{ margin: 10px 0 0; padding-left: 18px; }
.link-list a{ color: var(--muted); }
.link-list a:hover{ color: var(--text); }

/* ============ Chips ============ */
.chips{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.chip{
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--card2) 84%, transparent);
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 999px;
  font-size: 13px;
}

/* ============ Callout ============ */
.callout{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
  margin-top: 18px;
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid color-mix(in srgb, var(--brand2) 30%, var(--line));
  background:
    radial-gradient(900px 300px at 20% 50%, rgba(124,247,198,.14), transparent 60%),
    radial-gradient(700px 280px at 90% 40%, rgba(139,183,255,.12), transparent 60%),
    color-mix(in srgb, var(--card2) 86%, transparent);
}
.callout-actions{ display: flex; gap: 10px; flex-wrap: wrap; }

/* ============ Timeline ============ */
.timeline{
  border-left: 2px solid var(--line);
  padding-left: 18px;
  display: grid;
  gap: 12px;
}
.t-item{
  position: relative;
  padding: 12px 12px 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--card) 88%, transparent);
}
.t-dot{
  position: absolute;
  left: -26px;
  top: 16px;
  width: 12px; height: 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--bg2) 75%, transparent);
}
.t-top{
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.t-item.highlight{
  border-color: color-mix(in srgb, var(--brand) 28%, var(--line));
  background: color-mix(in srgb, var(--card2) 92%, transparent);
}

/* ============ Tabs (Program) ============ */
.tabs{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: color-mix(in srgb, var(--card) 84%, transparent);
}
.tablist{
  display: flex;
  gap: 8px;
  padding: 10px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--card2) 82%, transparent);
}
.tab{
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  transition: background .18s var(--ease), transform .18s var(--ease), color .18s var(--ease);
}
.tab[aria-selected="true"]{
  background: color-mix(in srgb, var(--card2) 92%, transparent);
  color: var(--text);
}
.tab:hover{ transform: translateY(-1px); }
.tabpanel{ padding: 14px; }

.agenda{ display: grid; gap: 10px; }
.slot{
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--card) 88%, transparent);
}
.time{ color: var(--muted); font-weight: 700; }
.what{ color: var(--text); }

/* ============ Sponsors ============ */
.sponsor-grid{
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(6, minmax(0,1fr));
}
.sponsor{
  border: 1px dashed var(--line);
  background: color-mix(in srgb, var(--card) 80%, transparent);
  border-radius: 14px;
  padding: 16px 10px;
  text-align: center;
  color: var(--muted);
  min-height: 56px;
  display: grid;
  place-items: center;
}

/* ============ Forms ============ */
.form label{ display: block; margin: 10px 0 6px; color: var(--muted); font-weight: 600; }
input, textarea{
  width: 100%;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg2) 80%, transparent);
  color: var(--text);
  outline: none;
}
input:focus, textarea:focus{
  border-color: color-mix(in srgb, var(--brand2) 40%, var(--line));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand2) 18%, transparent);
}
.row{
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
}
.form-hint{
  margin: 0;
  min-height: 1.2em;
  color: var(--muted);
  font-size: 13px;
}
.price{
  font-size: 20px;
  margin: 10px 0;
}

/* ============ Avatar ============ */
.avatar{
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 800;
  letter-spacing: .02em;
  background: linear-gradient(135deg, rgba(124,247,198,.22), rgba(139,183,255,.22));
  border: 1px solid var(--line);
  margin-bottom: 10px;
}

/* ============ Accordion ============ */
details{
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 12px;
  background: color-mix(in srgb, var(--card) 86%, transparent);
}
details + details{ margin-top: 10px; }
summary{
  cursor: pointer;
  font-weight: 700;
}
details p{ margin: 10px 0 0; }

/* ============ Footer ============ */
.footer{
  border-top: 1px solid var(--line);
  padding: 26px 0;
  background: color-mix(in srgb, var(--bg2) 75%, transparent);
}
.footer-inner{
  display: flex;
  gap: var(--gap);
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.footer-links{
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.social{
  display: flex;
  gap: 10px;
}
.icon{
  width: 38px; height: 38px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--card);
  display: grid;
  place-items: center;
}
.icon svg{
  fill: currentColor;
  opacity: .85;
}

/* ============ Back to top ============ */
.to-top{
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 1100;
  width: 44px;
  height: 44px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--card2) 88%, transparent);
  color: var(--text);
  box-shadow: var(--shadow);
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity .18s var(--ease), transform .18s var(--ease);
}
.to-top.show{
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ============ Reveal animations (prefers-reduced-motion respected) ============ */
.reveal{
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.reveal.in{
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  .reveal{ opacity: 1; transform: none; transition: none; }
  .btn{ transition: none; }
  .tab{ transition: none; }
  .to-top{ transition: none; }
  .site-header{ backdrop-filter: none; }
}

/* ============ Responsive ============ */
@media (max-width: 980px){
  .hero-inner{ grid-template-columns: 1fr; }
  .nav-toggle{ display: inline-flex; }
  .nav-links{
    display: none;
    position: absolute;
    top: 62px;
    right: var(--pad);
    left: var(--pad);
    padding: 12px;
    border-radius: 16px;
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--bg2) 84%, transparent);
    box-shadow: var(--shadow);
  }
  .nav-links.open{ display: flex; }
  .nav-links a{ flex: 1 1 auto; justify-content: center; text-align: center; }
  .grid-3{ grid-template-columns: 1fr; }
  .grid-2{ grid-template-columns: 1fr; }
  .sponsor-grid{ grid-template-columns: repeat(2, minmax(0,1fr)); }
  .callout{ flex-direction: column; align-items: stretch; }
  .row{ flex-direction: column; align-items: stretch; }
}

/* ============ Manual dark mode toggle ============ */
:root[data-theme="dark"]{
  color-scheme: dark;
}
:root[data-theme="light"]{
  color-scheme: light;
}


.btn.isdisabled,
.btn[disabled]{
  opacity: .45;
  filter: grayscale(1);
  cursor: not-allowed;
  pointer-events: none;   /* blocks mouse/touch clicks */
}

.meta-pill--logo .meta-value{
  display: flex;
  align-items: center;
  gap: 10px;
}

.meta-logo{
  height: 26px;          /* adjust if needed */
  width: auto;
  max-width: 320px;      /* prevents huge SVGs */
  object-fit: contain;
  filter: drop-shadow(0 6px 14px rgba(0,0,0,.18));
}


/* Right column badges under Quick Links */
.side-badges{
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

.side-badge{
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--card2) 86%, transparent);
  border-radius: 16px;
  padding: 10px 12px;
}

.side-badge-label{
  font-size: 12px;
  color: var(--muted);
  font-weight: 700;
  margin-bottom: 8px;
}

.side-badge-body{
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  min-height: 34px;
}

.side-logo{
  height: 60px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
}



.avatar img{
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
}

/* =========================
   Polished Speaker Cards
   ========================= */

   .speaker-grid{
    align-items: stretch;
  }
  
  .speaker-card{
    padding: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100%;
  }
  
  .speaker-card__top{
    position: relative;
    height: 150px;
    padding: 18px 18px 0;
    background:
      radial-gradient(circle at 20% 20%, rgba(255,255,255,.18), transparent 28%),
      linear-gradient(135deg, color-mix(in srgb, var(--brand) 18%, transparent), color-mix(in srgb, var(--brand2) 16%, transparent));
    border-bottom: 1px solid var(--line);
  }
  
  .speaker-card__badge{
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 2;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .03em;
    text-transform: uppercase;
    color: var(--text);
    background: color-mix(in srgb, var(--card2) 90%, transparent);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 6px 10px;
    backdrop-filter: blur(6px);
  }
  
  .speaker-card__photo{
    position: absolute;
    left: 22px;
    bottom: -38px;
    width: 96px;
    height: 96px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid color-mix(in srgb, var(--bg2) 88%, transparent);
    box-shadow:
      0 10px 26px rgba(0,0,0,.16),
      0 0 0 1px var(--line);
    background: color-mix(in srgb, var(--card2) 90%, transparent);
  }
  
  .speaker-card__body{
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 52px 22px 22px;
  }
  
  .speaker-card__name{
    margin: 0;
    font-size: clamp(22px, 2vw, 28px);
    line-height: 1.15;
    letter-spacing: -0.02em;
  }
  
  .speaker-card__affiliation{
    margin: 0;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.55;
    min-height: 3.2em;
  }
  
  .speaker-card__talk{
    margin-top: 4px;
    padding-top: 12px;
    border-top: 1px solid var(--line);
  }
  
  .speaker-card__talk-label{
    display: inline-block;
    margin-bottom: 6px;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .05em;
    text-transform: uppercase;
    color: color-mix(in srgb, var(--brand) 70%, var(--text));
  }
  
  .speaker-card__talk-title{
    margin: 0;
    font-size: 17px;
    line-height: 1.5;
    color: var(--text);
  }
  
  /* hover polish */
  .speaker-card{
    transition: transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease);
  }
  
  .speaker-card:hover{
    transform: translateY(-4px);
    border-color: color-mix(in srgb, var(--brand2) 30%, var(--line));
    box-shadow: 0 18px 36px rgba(0,0,0,.16);
  }
  
  .speaker-card:hover .speaker-card__photo{
    box-shadow:
      0 14px 30px rgba(0,0,0,.20),
      0 0 0 1px color-mix(in srgb, var(--brand2) 25%, var(--line));
  }
  
  /* better scaling on smaller screens */
  @media (max-width: 980px){
    .speaker-card__top{
      height: 138px;
    }
  
    .speaker-card__photo{
      width: 88px;
      height: 88px;
      bottom: -34px;
    }
  
    .speaker-card__body{
      padding: 48px 18px 18px;
    }
  
    .speaker-card__affiliation{
      min-height: auto;
    }
  }

  .section {
    scroll-margin-top: 70px;
  }
  .brand{
    display:flex;
    align-items:center;
    gap:14px;
    text-decoration:none;
    min-width:220px;
  }
  
  .brand-text{
    display:flex;
    flex-direction:column;
    justify-content:center;
    line-height:1.05;
  }
  
  .brand-title{
    font-size:clamp(35px, 2.2vw, 40px);
    font-weight:800;
    letter-spacing:-0.02em;
    color:var(--text);
  
    background: linear-gradient(
      135deg,
      color-mix(in srgb, var(--brand) 82%, #fff 18%),
      var(--brand2)
    );
    -webkit-background-clip:text;
    background-clip:text;
    -webkit-text-fill-color:transparent;
    display:inline-block;
  }
  
  .brand-date{
    display:block;
    margin-top:3px;
    font-size:12px;
    font-weight:700;
    letter-spacing:.1em;
    text-transform:uppercase;
    color:var(--text);
    opacity:.82;
  }
  
  .brand-location{
    display:block;
    margin-top:6px;
    font-size:13px;
    font-weight:500;
    color:var(--muted);
    letter-spacing:.02em;
  }
  
  @media (max-width: 680px){

  .announcement-label{
    display: none;
  }

  .announcement-inner{
    grid-template-columns: minmax(0, 1fr) auto;
    min-height: 48px;
  }

    .brand{
      gap:10px;
    }
  
    .brand-title{
      font-size:22px;
    }
  
    .brand-date{
      font-size:11px;
      margin-top:3px;
    }
  
    .brand-location{
      font-size:12px;
    }
  }

  .tab{
    display:flex;
    flex-direction:column;
    align-items:center;
    gap:2px;
    padding:12px 16px;
  }
  
  .tab-day{
    font-weight:600;
    font-size:15px;
  }
  
  .tab-date{
    font-size:12px;
    color:var(--muted);
  }
.prevconf-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:18px;
  margin-top:24px;
}

.prevconf-card{
  position:relative;
  padding:22px 22px 20px;
  border-radius:20px;
  background:linear-gradient(180deg, var(--card2), var(--card));
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  transition:transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
  overflow:hidden;
}

.prevconf-card::before{
  content:"";
  position:absolute;
  inset:0 auto 0 0;
  width:4px;
  background:linear-gradient(180deg, var(--brand2) 0%, var(--brand) 100%);
}

.prevconf-card:hover{
  transform:translateY(-4px);
  box-shadow:0 18px 40px rgba(0,0,0,.42);
  border-color:color-mix(in srgb, var(--brand2) 35%, var(--line));
}

.prevconf-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 14px;
  margin-bottom:10px;
}

.prevconf-tag{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:5px 11px;
  border-radius:999px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.05em;
  text-transform:uppercase;
  background:color-mix(in srgb, var(--brand) 16%, transparent);
  color:var(--brand);
  border:1px solid color-mix(in srgb, var(--brand) 28%, var(--line));
}

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

.prevconf-card h3{
  margin:0 0 6px;
  font-size:1.12rem;
  line-height:1.4;
  color:var(--text);
}

.prevconf-short{
  margin:0 0 14px;
  font-size:.97rem;
  font-weight:700;
  color:var(--muted);
  letter-spacing:.03em;
}

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

.prevconf-links a{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:38px;
  padding:8px 14px;
  border-radius:10px;
  text-decoration:none;
  font-size:14px;
  font-weight:600;
  line-height:1;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:var(--text);
  transition:all .22s var(--ease);
}

.prevconf-links a:hover{
  color:var(--brand);
  border-color:color-mix(in srgb, var(--brand) 32%, var(--line));
  background:color-mix(in srgb, var(--brand) 10%, transparent);
}

.prevconf-archive{
  margin-top:20px;
  text-align:center;
}

.prevconf-archive p{
  margin:0;
  color:var(--muted);
  font-size:.98rem;
}

.prevconf-archive a{
  color:var(--brand);
  text-decoration:none;
  font-weight:600;
}

.prevconf-archive a:hover{
  text-decoration:underline;
}

@media (min-width: 700px){
  .prevconf-grid{
    grid-template-columns:repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px){
  .prevconf-grid{
    grid-template-columns:repeat(3, minmax(0, 1fr));
    gap:20px;
  }

  .prevconf-card{
    padding:24px 24px 22px;
  }
}

@media (max-width: 520px){
  .prevconf-card{
    padding:18px 18px 16px;
    border-radius:16px;
  }

  .prevconf-card h3{
    font-size:1.02rem;
  }

  .prevconf-links{
    gap:8px;
  }

  .prevconf-links a{
    width:100%;
    justify-content:center;
  }
}

.committee-link{
  margin-top:8px;
}

.committee-link a{
  color:var(--brand);
  text-decoration:none;
  font-weight:600;
}

.committee-link a:hover{
  text-decoration:underline;
}

.committee-grid{
  margin-top:24px;
}

.committee-card h3{
  margin-bottom:12px;
}

.committee-list{
  margin:0;
  padding-left:1.1rem;
  color:var(--muted);
}

.committee-list li{
  margin:0 0 10px;
  line-height:1.55;
}

.committee-list strong{
  color:var(--text);
}

.committee-card-wide{
  margin-top:18px;
}

.committee-columns{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
  margin-top:10px;
}

@media (min-width: 700px){
  .committee-columns{
    grid-template-columns:repeat(2, minmax(0, 1fr));
  }
}

.committee-grid{
  margin-top:24px;
  grid-template-columns:1fr;
}

@media (min-width: 700px){
  .committee-grid{
    grid-template-columns:repeat(2, minmax(0, 1fr));
  }
}

.hero-org-logos picture,
.hero-org-logos img{
  display:block;
  max-width:80%;
  height:auto;
}