.vc_sponsor-wall {
  --vc-sponsor-tier-gap: 3rem;
  --vc-sponsor-logo-gap: 2rem;
  --vc-sponsor-logo-max-width: 200px;
  --vc-sponsor-logo-opacity: 0.85;
  --vc-sponsor-logo-hover-opacity: 1;
  --vc-sponsor-accent: var(--vc-brand-accent, #00a3ff);

  display: flex;
  flex-direction: column;
  gap: var(--vc-sponsor-tier-gap);
}

/* Tier Groups */
.vc_sponsor-wall__tier {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Tier Labels */
.vc_sponsor-wall__tier-label {
  text-align: center;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.125em;
  text-transform: uppercase;
  color: #666;
  margin: 0;
}

/* Logos Container */
.vc_sponsor-wall__logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--vc-sponsor-logo-gap);
}

/* Individual Logo */
.vc_sponsor-wall__logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  max-width: var(--vc-sponsor-logo-max-width);
  padding: 0.5rem;
  transition: opacity 0.3s ease, filter 0.3s ease;
  opacity: var(--vc-sponsor-logo-opacity);
}

.vc_sponsor-wall__logo:hover {
  opacity: var(--vc-sponsor-logo-hover-opacity);
}

/* Logo Images */
.vc_sponsor-wall__logo img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 80px;
  object-fit: contain;
  filter: grayscale(100%);
  transition: filter 0.3s ease;
}

.vc_sponsor-wall__logo:hover img {
  filter: grayscale(0%);
}

/* Tier-Specific Sizing */
[data-tier="title"] .vc_sponsor-wall__logo img {
  max-height: 80px;
}

[data-tier="presenting"] .vc_sponsor-wall__logo img {
  max-height: 60px;
}

[data-tier="gold"] .vc_sponsor-wall__logo img {
  max-height: 60px;
}

[data-tier="silver"] .vc_sponsor-wall__logo img {
  max-height: 50px;
}

[data-tier="supporting"] .vc_sponsor-wall__logo img {
  max-height: 50px;
}

[data-tier="media"] .vc_sponsor-wall__logo img {
  max-height: 40px;
}

[data-tier="community"] .vc_sponsor-wall__logo img {
  max-height: 40px;
}

/* Logo Text Fallback */
.vc_sponsor-wall__logo-text {
  font-size: 0.875rem;
  font-weight: 600;
  color: #999;
  text-align: center;
}

/* Responsive: Tablet */
@media (max-width: 768px) {
  .vc_sponsor-wall {
    --vc-sponsor-tier-gap: 2rem;
    --vc-sponsor-logo-gap: 1.5rem;
    --vc-sponsor-logo-max-width: 150px;
  }

  [data-tier="title"] .vc_sponsor-wall__logo img {
    max-height: 60px;
  }

  [data-tier="presenting"],
  [data-tier="gold"] {
    --vc-sponsor-logo-max-width: 120px;
  }

  [data-tier="presenting"] .vc_sponsor-wall__logo img,
  [data-tier="gold"] .vc_sponsor-wall__logo img {
    max-height: 45px;
  }

  [data-tier="silver"],
  [data-tier="supporting"] {
    --vc-sponsor-logo-max-width: 100px;
  }

  [data-tier="silver"] .vc_sponsor-wall__logo img,
  [data-tier="supporting"] .vc_sponsor-wall__logo img {
    max-height: 40px;
  }

  [data-tier="media"],
  [data-tier="community"] {
    --vc-sponsor-logo-max-width: 90px;
  }

  [data-tier="media"] .vc_sponsor-wall__logo img,
  [data-tier="community"] .vc_sponsor-wall__logo img {
    max-height: 30px;
  }
}

/* Responsive: Mobile */
@media (max-width: 480px) {
  .vc_sponsor-wall {
    --vc-sponsor-tier-gap: 1.5rem;
    --vc-sponsor-logo-gap: 1rem;
    --vc-sponsor-logo-max-width: 100px;
  }

  .vc_sponsor-wall__logos {
    max-width: 100%;
  }

  [data-tier="title"] .vc_sponsor-wall__logo img {
    max-height: 50px;
  }

  [data-tier="presenting"],
  [data-tier="gold"] {
    --vc-sponsor-logo-max-width: 80px;
  }

  [data-tier="presenting"] .vc_sponsor-wall__logo img,
  [data-tier="gold"] .vc_sponsor-wall__logo img {
    max-height: 35px;
  }

  [data-tier="silver"],
  [data-tier="supporting"] {
    --vc-sponsor-logo-max-width: 70px;
  }

  [data-tier="silver"] .vc_sponsor-wall__logo img,
  [data-tier="supporting"] .vc_sponsor-wall__logo img {
    max-height: 30px;
  }

  [data-tier="media"],
  [data-tier="community"] {
    --vc-sponsor-logo-max-width: 60px;
  }

  [data-tier="media"] .vc_sponsor-wall__logo img,
  [data-tier="community"] .vc_sponsor-wall__logo img {
    max-height: 24px;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .vc_sponsor-wall__logo {
    transition: none;
  }

  .vc_sponsor-wall__logo img {
    transition: none;
  }
}

/* Print */
@media print {
  .vc_sponsor-wall__logo {
    opacity: 1;
  }

  .vc_sponsor-wall__logo img {
    filter: grayscale(0%);
  }

  .vc_sponsor-wall__logo:hover img {
    filter: grayscale(0%);
  }
}