.site-header {
  --event-topbar-height: 118px;
  --event-nav-height: 46px;
  top: 0;
  padding-top: 0;
  color: #17202b;
}

.event-topbar,
.event-topbar a,
.event-topbar button {
  font-family: var(--mini-font);
}

.site-header.is-scrolled {
  padding-top: 0;
}

.site-header.is-scrolled,
.site-header.topbar-hidden {
  --event-topbar-height: 0px;
}

.event-topbar {
  width: 100%;
  height: var(--event-topbar-height);
  display: grid;
  grid-template-columns: minmax(220px, 1.05fr) minmax(280px, 1.35fr) minmax(300px, 1.45fr) minmax(150px, 0.8fr);
  align-items: stretch;
  background: #fff;
  border-top: 1px solid rgba(23, 32, 43, 0.32);
  border-bottom: 1px solid rgba(23, 32, 43, 0.2);
  color: #17202b;
  font-family: var(--mini-font);
  pointer-events: auto;
  overflow: hidden;
  transition: height 360ms ease, opacity 260ms ease, transform 360ms ease, border-color 260ms ease;
}

.site-header.is-scrolled .event-topbar,
.site-header.topbar-hidden .event-topbar {
  height: 0;
  min-height: 0;
  transform: translateY(-100%);
  opacity: 0;
  border-top-color: transparent;
  border-bottom-color: transparent;
  pointer-events: none;
}

.event-topbar__brand,
.event-topbar__details,
.event-topbar__partners,
.event-topbar__actions {
  min-width: 0;
  border-right: 1px solid rgba(23, 32, 43, 0.28);
}

.event-topbar__brand {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 1.25rem;
  overflow: hidden;
}

.event-topbar__brand img {
  width: min(100%, 400px);
  height: 100%;
  max-width: none;
  object-fit: contain;
  object-position: center;
}

.event-topbar__details {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.45rem;
  padding: 1rem clamp(1rem, 2vw, 2rem);
  border-right: 0;
}

.event-topbar__details p {
  margin: 0;
  font-family: var(--mini-font);
}

.event-topbar__date {
  color: #000;
  font-size: clamp(1rem, 1.35vw, 1.35rem);
  font-weight: 600;
  letter-spacing: 0.015em;
  line-height: 1.05;
  text-transform: uppercase;
}

.event-topbar__venue {
  color: #17202b;
  font-size: clamp(0.92rem, 1.12vw, 1.1rem);
  font-weight: 500;
  line-height: 1.1;
}

.event-topbar__series {
  max-width: 440px;
  color: rgba(23, 32, 43, 0.72);
  font-size: 0.72rem;
  line-height: 1.25;
  text-transform: uppercase;
}

.event-topbar__partners {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 0.9rem;
}

.event-topbar__partner {
  min-width: 0;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 0.2rem;
  margin: 0;
}

.event-topbar__partner figcaption {
  color: #17202b;
  font-family: var(--mini-font);
  font-size: 0.58rem;
  font-weight: 700;
  line-height: 1;
  text-align: center;
  white-space: normal;
}

.event-topbar__partner img {
  width: min(100%, 125px);
  height: 72px;
  max-width: 145px;
  object-fit: cover;
  object-position: center;
}

.event-topbar__actions {
  grid-column: 4;
  display: grid;
  align-content: center;
  gap: 0.6rem;
  border-left: 1px solid rgba(23, 32, 43, 0.28);
  border-right: 0;
  padding: 0.7rem 1.25rem;
}

.event-topbar__cta {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.75rem;
  background: var(--logo-green);
  color: #fff;
  font-family: var(--mini-font);
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1;
  text-align: center;
  text-transform: uppercase;
  transition: filter 180ms ease, transform 180ms ease;
}

.event-topbar__cta--booth {
  background: #b94a37;
  color: #fff;
}

.event-topbar__cta:hover,
.event-topbar__cta:focus-visible {
  filter: brightness(1.08);
  transform: translateY(-1px);
  outline: 0;
}

@media (min-width: 1024px) {
  .site-header {
    --event-topbar-height: 118px;
    --event-nav-height: 44px;
  }

  .event-topbar {
    grid-template-columns: minmax(300px, 1.08fr) minmax(390px, 1.55fr) 280px 300px;
  }
}

@media (max-width: 1023px) {
  .event-topbar {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: 68px 50px;
    padding: 0.35rem 0.75rem;
  }

  .event-topbar__brand {
    justify-content: flex-start;
    border-right: 0;
    padding: 0;
  }

  .event-topbar__brand img {
    width: min(280px, 82vw);
    height: 62px;
  }

  .event-topbar__details {
    grid-column: 1;
    grid-row: 2;
    border-right: 0;
    padding: 0.25rem 0;
  }

  .event-topbar__date,
  .event-topbar__venue {
    font-size: 0.7rem;
  }

  .event-topbar__series,
  .event-topbar__partners {
    display: none;
  }

  .event-topbar__actions {
    grid-column: 2;
    grid-row: 2;
    display: flex;
    align-items: center;
    border-left: 0;
    border-right: 0;
    padding: 0;
  }

  .event-topbar__cta {
    min-height: 30px;
    padding: 0.35rem 0.55rem;
    font-size: 0.62rem;
  }
}

/* The full four-column header needs more than a typical 13-inch MacBook viewport. */
@media (min-width: 1024px) and (max-width: 1439px) {
  .event-topbar {
    grid-template-columns: minmax(280px, 1.1fr) minmax(300px, 1fr) minmax(180px, 0.65fr);
  }

  .event-topbar__partners {
    display: none;
  }

  .event-topbar__actions {
    grid-column: 3;
    padding-inline: clamp(0.75rem, 1.5vw, 1.1rem);
  }
}

/* Prevent the stacked tablet header from clipping its two rows of content. */
@media (max-width: 1023px) {
  .site-header {
    --event-topbar-height: 130px;
    --event-nav-height: 46px;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .site-header {
    --event-topbar-height: 136px;
  }

  .event-topbar {
    grid-template-rows: 70px 48px;
    padding: 0.45rem 1rem;
  }

  .event-topbar__brand img {
    width: min(320px, 54vw);
    height: 64px;
  }

  .event-topbar__date {
    font-size: 0.9rem;
  }

  .event-topbar__venue {
    font-size: 0.82rem;
  }

  .event-topbar__cta {
    min-height: 32px;
    padding: 0.4rem 0.68rem;
    font-size: 0.68rem;
  }
}