/* ================================================
   Block: Event Sponsors (Tiered)
   ================================================ */
.event-sponsors-block {
    padding: 40px 0;
    max-width: 1200px;
    margin: 0 auto;
}

/* Header row: title + toggle button */
.event-sponsors-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 30px;
}

.event-sponsors-header--no-title {
    justify-content: flex-end;
}

.event-sponsors-title {
    margin: 0;
    font-size: 18px;
    color: var(--90-brand);
}

.event-sponsors-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: 1px solid var(--60-gray);
    border-radius: 4px;
    padding: 8px 16px;
    font-size: 13px;
    font-family: var(--font-family-century-gothic);
    color: var(--90-brand);
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease;
    white-space: nowrap;
}

.event-sponsors-toggle:hover {
    background-color: var(--background-blue);
    border-color: var(--90-brand);
}

.event-sponsors-toggle[aria-expanded="true"] .toggle-icon {
    transform: rotate(180deg);
}

.toggle-icon {
    transition: transform 0.3s ease;
}

/* Tier sections */
.event-sponsors-tier {
    margin-bottom: 30px;
}

.event-sponsors-tier--collapsed {
    display: none;
}

.event-sponsors-block.is-expanded .event-sponsors-tier--collapsed {
    display: block;
}

/* Tier label with horizontal rules */
.event-sponsors-tier-label {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.event-sponsors-tier-label::before,
.event-sponsors-tier-label::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: #d1d5db;
}

.event-sponsors-tier-name {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1.5px;
    color: var(--60-gray);
    white-space: nowrap;
}

/* Logo grid */
.event-sponsors-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 24px;
}

.event-sponsor-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.event-sponsor-logo:hover {
    opacity: 0.7;
}

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

/* Tier sizing - Large (1st tier): ~3-4 per row */
.tier-size-lg .event-sponsors-logos {
    gap: 40px;
}

.tier-size-lg .event-sponsor-logo {
    width: 180px;
    max-height: 100px;
}

.tier-size-lg .event-sponsor-logo img {
    max-height: 100px;
}

/* Tier sizing - Medium (2nd tier): ~4-5 per row */
.tier-size-md .event-sponsors-logos {
    gap: 32px;
}

.tier-size-md .event-sponsor-logo {
    width: 150px;
    max-height: 80px;
}

.tier-size-md .event-sponsor-logo img {
    max-height: 80px;
}

/* Tier sizing - Small (3rd tier): ~5-6 per row */
.tier-size-sm .event-sponsors-logos {
    gap: 24px;
}

.tier-size-sm .event-sponsor-logo {
    width: 120px;
    max-height: 60px;
}

.tier-size-sm .event-sponsor-logo img {
    max-height: 60px;
}

/* Tier sizing - Extra small (4th+ tier): ~6-8 per row */
.tier-size-xs .event-sponsors-logos {
    gap: 20px;
}

.tier-size-xs .event-sponsor-logo {
    width: 100px;
    max-height: 50px;
}

.tier-size-xs .event-sponsor-logo img {
    max-height: 50px;
}

/* Expand/collapse transition */
.event-sponsors-tiers {
    overflow: hidden;
}

/* Mobile: show swiper, hide grid */
.event-sponsors-mobile {
    display: block;
}

.event-sponsors-mobile .event-sponsor-logo {
    width: 100%;
    max-height: 60px;
}

.event-sponsors-mobile .event-sponsor-logo img {
    max-height: 60px;
}

/* Responsive */
@media only screen and (max-width: 767px) {
    .event-sponsors-block {
        padding: 24px 16px;
    }

    .event-sponsors-header {
        margin-bottom: 20px;
    }

    .event-sponsors-title {
        font-size: 16px;
    }

    .event-sponsors-tier {
        margin-bottom: 20px;
    }

    .tier-size-lg .event-sponsors-logos,
    .tier-size-md .event-sponsors-logos,
    .tier-size-sm .event-sponsors-logos,
    .tier-size-xs .event-sponsors-logos {
        gap: 16px;
    }

    .tier-size-lg .event-sponsor-logo {
        width: 140px;
        max-height: 70px;
    }
    .tier-size-lg .event-sponsor-logo img {
        max-height: 70px;
    }
}

@media only screen and (min-width: 768px) {
    .event-sponsors-mobile {
        display: none !important;
    }
}