/* ============================================================
   SPONSORS SECTION — event page partner section
   Uses --event-* design tokens from event-detail.css.
   ============================================================ */

/* ── Section shell ────────────────────────────────────────── */
.sp-section {
    border-top: 1px solid var(--event-border, #e3e7ec);
    background: var(--event-bg-alt, #f8fafc);
}

/* ── Featured (main) sponsors row ────────────────────────── */
.sp-featured-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: stretch;
    gap: 1.5rem 2rem;
    margin-bottom: 2.5rem;
}

.sp-featured-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .6rem;
    background: #fff;
    border: 1px solid var(--event-border, #e3e7ec);
    border-top: 3px solid var(--event-accent, #1d4ed8);
    border-radius: var(--event-radius-lg, 12px);
    padding: 1.75rem 2.5rem;
    min-width: 200px;
    max-width: 300px;
    box-shadow: 0 4px 14px rgba(15,23,42,.06);
    transition: box-shadow .2s, transform .2s;
    flex: 1 1 200px;
}

.sp-featured-card:hover {
    box-shadow: 0 8px 28px rgba(15,23,42,.12);
    transform: translateY(-3px);
}

.sp-featured-card__badge {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    font-size: .65rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    background: #1d4ed820;
    color: #1d4ed8;
    padding: .3rem .7rem;
    border-radius: 20px;
    white-space: nowrap;
}

.sp-featured-card__inner {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    width: 100%;
    min-height: 90px;
}

.sp-featured-card__logo {
    max-height: 100px;
    max-width: 220px;
    width: auto;
    object-fit: contain;
    display: block;
}

.sp-featured-card__name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--event-text, #111827);
    text-align: center;
}

.sp-featured-card__desc {
    font-size: .8rem;
    color: var(--event-muted, #6b7280);
    text-align: center;
    margin: 0;
    line-height: 1.5;
}

/* ── Secondary sponsors grid ──────────────────────────────── */
.sp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.sp-grid:empty {
    display: none;
}

.sp-item {
    background: #fff;
    border: 1px solid var(--event-border, #e3e7ec);
    border-radius: var(--event-radius, 8px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: .4rem;
    padding: 1.25rem 1rem;
    min-height: 100px;
    transition: box-shadow .2s, transform .2s;
}

.sp-item:hover {
    box-shadow: 0 4px 12px rgba(15,23,42,.09);
    transform: translateY(-2px);
}

.sp-item__link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .4rem;
    width: 100%;
    text-decoration: none;
}

.sp-item__logo {
    max-height: 56px;
    max-width: 130px;
    width: auto;
    object-fit: contain;
    filter: grayscale(80%);
    opacity: .65;
    transition: filter .25s ease, opacity .25s ease;
    display: block;
}

.sp-item:hover .sp-item__logo,
.sp-item__link:hover .sp-item__logo {
    filter: grayscale(0%);
    opacity: 1;
}

.sp-item__name {
    font-size: .8rem;
    font-weight: 600;
    color: var(--event-muted, #6b7280);
    text-align: center;
}

.sp-item__type {
    font-size: .65rem;
    font-weight: 600;
    color: var(--event-muted, #6b7280);
    display: flex;
    align-items: center;
    gap: .25rem;
}

/* ── Empty state (no sponsors yet) ───────────────────────── */
.sp-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 3rem 1.5rem 2.5rem;
    background: #fff;
    border: 1.5px dashed var(--event-border, #e3e7ec);
    border-radius: var(--event-radius-lg, 12px);
    margin-bottom: 2rem;
}

.sp-empty-state__icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: #1d4ed8;
    margin-bottom: 1.25rem;
    box-shadow: 0 0 0 8px #eff6ff60;
}

.sp-empty-state__title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--event-text, #111827);
    margin: 0 0 .5rem;
}

.sp-empty-state__text {
    font-size: .9rem;
    color: var(--event-muted, #6b7280);
    margin: 0 0 1.25rem;
    max-width: 440px;
    line-height: 1.55;
}

.sp-empty-state__perks {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .5rem .75rem;
}

.sp-empty-state__perks span {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    font-size: .75rem;
    font-weight: 600;
    color: #1d4ed8;
    background: #eff6ff;
    padding: .3rem .75rem;
    border-radius: 20px;
}

/* ── Become a partner banner ──────────────────────────────── */
.sp-become-partner {
    display: flex;
    align-items: center;
    gap: 1.75rem;
    background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 60%, #2563eb 100%);
    border-radius: var(--event-radius-lg, 12px);
    padding: 2rem 2.5rem;
    color: #fff;
    margin-top: .5rem;
}

.sp-become-partner__icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: rgba(255,255,255,.15);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: #fff;
}

.sp-become-partner__body {
    flex: 1;
    min-width: 0;
}

.sp-become-partner__title {
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    margin: 0 0 .35rem;
}

.sp-become-partner__text {
    font-size: .875rem;
    color: rgba(255,255,255,.8);
    margin: 0 0 .75rem;
    line-height: 1.55;
}

.sp-become-partner__perks {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem .75rem;
}

.sp-become-partner__perks span {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    font-size: .75rem;
    font-weight: 600;
    color: rgba(255,255,255,.9);
    background: rgba(255,255,255,.12);
    padding: .25rem .65rem;
    border-radius: 20px;
}

.sp-become-partner__btn {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    background: #fff;
    color: #1d4ed8;
    font-weight: 700;
    font-size: .9rem;
    padding: .8rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    white-space: nowrap;
    transition: background .15s, transform .15s, box-shadow .15s;
    box-shadow: 0 2px 8px rgba(0,0,0,.15);
}

.sp-become-partner__btn:hover {
    background: #f0f4ff;
    color: #1e40af;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(0,0,0,.2);
    text-decoration: none;
}

.sp-become-partner__btn .bi-arrow-right {
    transition: transform .15s;
}
.sp-become-partner__btn:hover .bi-arrow-right {
    transform: translateX(3px);
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 768px) {
    .sp-featured-row {
        gap: 1rem;
    }
    .sp-featured-card {
        min-width: 160px;
        padding: 1.25rem 1.5rem;
    }
    .sp-featured-card__logo {
        max-height: 72px;
        max-width: 160px;
    }
    .sp-grid {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    }
    .sp-become-partner {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.25rem;
        padding: 1.5rem;
    }
    .sp-become-partner__btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .sp-featured-card {
        max-width: 100%;
        flex: 1 1 100%;
    }
    .sp-featured-card__logo {
        max-height: 60px;
    }
    .sp-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ── Accessibility ────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .sp-featured-card,
    .sp-item,
    .sp-become-partner__btn,
    .sp-item__logo { transition: none; }
}