/* M10. Sponsors — Tiered Partner Showcase */

/* ============================================================
   M11. SPONSORS — Tiered Partner Showcase
   ============================================================ */
.sponsors {
  padding: clamp(80px, 12vw, 140px) clamp(24px, 6vw, 80px);
  background: var(--brn-dark);
  border-top: 1px solid var(--border-color);
}
.sponsors-header {
  text-align: center;
  margin-bottom: 60px;
}
.sponsors-eyebrow {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--brn-gold);
  margin-bottom: 16px;
}
.sponsors-title {
  font-family: 'Instrument Sans', 'Inter', sans-serif;
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

/* --- Tier Section --- */
.sponsor-tier {
  max-width: 1000px;
  margin: 0 auto 56px;
}
.sponsor-tier:last-child { margin-bottom: 0; }
.sponsor-tier-label {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}
.sponsor-tier-label.tier-presented { color: var(--brn-gold); border-bottom-color: rgba(201,168,76,0.3); font-size: 0.75rem; letter-spacing: 0.2em; }
.sponsor-tier-label.tier-sponsor { color: var(--brn-blue-accent); border-bottom-color: rgba(91,155,255,0.15); }
.sponsor-tier-label.tier-strategic { color: var(--text-secondary); font-size: 0.55rem; }
.sponsor-tier-label.tier-media { color: var(--text-muted); font-size: 0.55rem; }

/* --- Sponsor Grid --- */
.sponsor-grid {
  display: grid;
  gap: 14px;
}
.sponsor-grid.grid-1 { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
.sponsor-grid.grid-2 { grid-template-columns: repeat(2, 1fr); }
.sponsor-grid.grid-3 { grid-template-columns: repeat(3, 1fr); }
.sponsor-grid.grid-4 { grid-template-columns: repeat(4, 1fr); }
.sponsor-grid.grid-6 { grid-template-columns: repeat(6, 1fr); }

/* --- Sponsor Card --- */
.sponsor-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: inherit;
  transition: all 0.4s var(--ease-smooth);
  cursor: pointer;
}
.sponsor-card:hover {
  border-color: var(--border-hover);
  background: rgba(255,255,255,0.04);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

/* Presented by — premium card (hero tier) */
.sponsor-card.card-presented {
  padding: 40px 48px;
  border-color: rgba(201,168,76,0.2);
  background: linear-gradient(135deg, rgba(201,168,76,0.06) 0%, transparent 60%);
  border-radius: var(--radius);
}
.sponsor-card.card-presented:hover {
  border-color: rgba(201,168,76,0.4);
  box-shadow: 0 0 60px rgba(201,168,76,0.08), 0 16px 48px rgba(0,0,0,0.35);
}

.sponsor-card-logo {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 8px;
  overflow: hidden;
}
.sponsor-card-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.5;
}
.sponsor-card:hover .sponsor-card-logo img { opacity: 0.8; }
.sponsor-card.card-presented .sponsor-card-logo {
  width: 72px;
  height: 72px;
  background: rgba(201,168,76,0.08);
  padding: 14px;
  border-radius: 14px;
}
.sponsor-card.card-presented .sponsor-card-logo img {
  filter: brightness(0) invert(1) sepia(1) saturate(3) hue-rotate(10deg);
  opacity: 0.7;
}

.sponsor-card-info {
  flex: 1;
  min-width: 0;
}
.sponsor-card-name {
  font-family: 'Instrument Sans', 'Inter', sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sponsor-card.card-presented .sponsor-card-name { font-size: 1.2rem; }
.sponsor-card.card-presented .sponsor-card-desc { font-size: 0.82rem; }
.sponsor-card-desc {
  font-size: 0.7rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-top: 2px;
}

.sponsor-card-arrow {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.3s, transform 0.3s;
  flex-shrink: 0;
}
.sponsor-card:hover .sponsor-card-arrow {
  opacity: 0.6;
  transform: translateX(0);
}

/* --- Strategic/Media tier: compact cards --- */
.sponsor-grid.grid-4 .sponsor-card,
.sponsor-grid.grid-6 .sponsor-card {
  padding: 12px 16px;
  gap: 10px;
}
.sponsor-grid.grid-4 .sponsor-card-logo,
.sponsor-grid.grid-6 .sponsor-card-logo {
  width: 36px;
  height: 36px;
  padding: 6px;
  border-radius: 8px;
}
.sponsor-grid.grid-4 .sponsor-card-name,
.sponsor-grid.grid-6 .sponsor-card-name {
  font-size: 0.78rem;
}
.sponsor-grid.grid-4 .sponsor-card-desc,
.sponsor-grid.grid-6 .sponsor-card-desc {
  display: none;
}
/* Media grid-6: even more compact */
.sponsor-grid.grid-6 .sponsor-card {
  padding: 10px 12px;
  gap: 8px;
}
.sponsor-grid.grid-6 .sponsor-card-logo {
  width: 28px;
  height: 28px;
  padding: 4px;
}
.sponsor-grid.grid-6 .sponsor-card-name {
  font-size: 0.72rem;
}

/* --- Media partner: no link, subtler --- */
.sponsor-card.card-media {
  cursor: default;
  opacity: 0.5;
}
.sponsor-card.card-media:hover {
  opacity: 0.7;
  transform: none;
  box-shadow: none;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .sponsor-grid.grid-2,
  .sponsor-grid.grid-3 { grid-template-columns: 1fr; }
  .sponsor-grid.grid-4 { grid-template-columns: repeat(2, 1fr); }
  .sponsor-grid.grid-6 { grid-template-columns: 1fr; }
}
@media (min-width: 769px) and (max-width: 1024px) {
  .sponsor-grid.grid-4 { grid-template-columns: repeat(2, 1fr); }
  .sponsor-grid.grid-6 { grid-template-columns: repeat(2, 1fr); }
}