*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: 'Segoe UI', Arial, sans-serif;
  background-color: #1a1a2e;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

body {
  display: flex;
  flex-direction: column;
}

/* ── Header ─────────────────────────────────────── */
#header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 80px;
  background: rgba(0, 0, 0, 0.45);
  flex-shrink: 0;
}

#header img {
  height: 60px;
  object-fit: contain;
}

#event-name {
  flex: 1;
  text-align: center;
  color: white;
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0 1rem;
}

/* ── Main (three equal sections) ────────────────── */
#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

.logo-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 0.5rem 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  min-height: 0;
}

.logo-section:last-child {
  border-bottom: none;
}

.logo-section h2 {
  color: rgba(255, 255, 255, 0.75);
  font-size: 1.1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  margin-bottom: 0.35rem;
  flex-shrink: 0;
}

/* ── Logo grid ───────────────────────────────────── */
.logo-grid {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  min-height: 0;
  opacity: 1;
  transition: opacity var(--transition-ms, 700ms) ease;
}

.logo-grid.fading {
  opacity: 0;
}

.logo-cell {
  flex: 1;
  height: 90%;
  min-width: 80px;
  background: white;
  border-radius: 10px;
  padding: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-cell img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* ── Footer ─────────────────────────────────────── */
#footer {
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.45);
  flex-shrink: 0;
}

#footer-text {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

/* ── Utility ─────────────────────────────────────── */
.hidden {
  display: none !important;
}