:root {
  --ink: #10151f;
  --paper: #fbf8f2;
  --paper-2: #f2ede4;
  --gold: #c89b3c;
  --blue: #17233f;
  --muted: #697181;
  --line: #ddd3c3;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}
a { color: inherit; }
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;

    background: rgba(16, 21, 31, 0.95);
    backdrop-filter: blur(8px);
}
.site-header.small {
    background: rgba(16,21,31,.95);
}
.nav {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 4vw;
  color: white;
}
.brand {
  font-weight: 800;
  letter-spacing: .12em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
  font-size: .92rem;
}
.nav-links a {
  color: rgba(255,255,255,.88);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.nav-links a:hover { color: white; border-color: var(--gold); }
.nav-toggle { display: none; background: transparent; color: white; border: 0; font-size: 1.6rem; }

.hero {
  min-height: 100vh;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;

  background-image: url("bhio-topics-hero-v2.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero::before {
  content: none;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(2, 3, 8, 0.48),
    rgba(2, 3, 8, 0.22) 60%,
    rgba(2, 3, 8, 0.36)
  );
}


.hero-content {
  position: relative;
  z-index: 2;
  max-width: 980px;
  padding: 120px 24px 60px;
  color: white;
  text-align: center;
}
.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: .22em;
  font-size: .78rem;
  font-weight: 800;
}
h1, h2, h3 { line-height: 1.12; }
.hero h1 {
  margin: 0 0 28px;
  font-family: Georgia, 'Times New Roman', serif;
  font-size: clamp(3.4rem, 9vw, 8.7rem);
  font-weight: 500;
  letter-spacing: -.05em;
  text-shadow: 0 18px 48px rgba(0,0,0,.65);
}
.venue, .city, .dates {
  margin: 6px 0;
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  letter-spacing: .03em;
}
.dates { color: #f3d18b; font-weight: 700; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 32px; }
.button {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid currentColor;
}
.button.primary { color: #10151f; background: var(--gold); border-color: var(--gold); }
.button.secondary { color: white; background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.55); }
.section { padding: 72px 6vw; }
.narrow { max-width: 920px; margin: 0 auto; }
.section h2 { font-size: clamp(2rem, 4vw, 3.4rem); font-family: Georgia, 'Times New Roman', serif; font-weight: 500; margin: 0 0 28px; }
.intro p, .theme-block p { font-size: 1.18rem; }
.cards-section { background: var(--paper-2); }
.cards { max-width: 1120px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card { background: white; border: 1px solid var(--line); padding: 28px; min-height: 190px; box-shadow: 0 18px 40px rgba(20,16,10,.06); }
.card h3 { margin-top: 0; font-size: 1.45rem; }
.theme-block { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sponsors { text-align: center; background: #10151f; color: white; }
.muted { color: var(--muted); }
.sponsors .muted { color: rgba(255,255,255,.62); }
footer { padding: 34px 6vw; background: #070a10; color: rgba(255,255,255,.75); text-align: center; font-size: .9rem; }
.page { min-height: 70vh; }
.page-title { padding: 125px 6vw 64px; color: white; background: radial-gradient(circle at 50% 20%, rgba(200,155,60,.4), transparent 20%), linear-gradient(140deg, #060910, #17233f 60%, #3b260e); text-align: center; }
.page-title h1 { margin: 0; font-size: clamp(3rem, 7vw, 6rem); font-family: Georgia, 'Times New Roman', serif; font-weight: 500; letter-spacing: -.04em; }
.page .section h2 { font-size: 2rem; margin-top: 42px; }
.name-list {
    list-style: none;
    padding: 0;
    margin: 0;
    column-count: 1 !important;
    columns: 1 !important;
    column-gap: 0 !important;
}

.name-list li {
    display: block;
    width: 100%;
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
}
.schedule h2 { padding-top: 24px; border-top: 1px solid var(--line); }
ul { padding-left: 1.2rem; }
@media (max-width: 900px) {
  .nav { align-items: flex-start; padding-top: 22px; padding-bottom: 22px; }
  .nav-toggle { display: block; }
  .nav-links { display: none; width: 100%; flex-direction: column; gap: 10px; padding-top: 18px; }
  .nav.open { flex-wrap: wrap; }
  .nav.open .nav-links { display: flex; }
  .cards { grid-template-columns: 1fr; }
  .name-list { columns: 1; }
}

.logo-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 650px;
  margin: 24px auto 0;
}

.logo-card {
  height: 105px;
  padding: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border-radius: 4px;
  box-sizing: border-box;
}

.logo-card img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 155px;
  object-fit: contain;
}

.support-label {
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

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

  .logo-card {
    height: 90px;
    padding: 14px;
  }
/* } */

.speaker-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.speaker-table th,
.speaker-table td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.speaker-table th:first-child,
.speaker-table td:first-child {
  width: 46%;
  padding-right: 32px;
}

.speaker-table th:last-child,
.speaker-table td:last-child {
  width: 62%;
}

.form-frame {
  max-width: 820px;
  margin: 2rem auto;
  background: #ffffff;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.18);
}

.questions-block {
  margin-top: 3rem;
}