.active-tier-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-card-hover);
  overflow: hidden;
  pointer-events: auto;
}
.tier-info {
  align-items: center;
  color: var(--color-cloud);
  display: flex;
  gap: var(--spacing-xl);
  justify-content: space-between;
  padding: var(--spacing-xl);
  position: relative;
}
.tier-cta {
  flex-shrink: 0;
  position: relative;
}
.tier--kindred .tier-info {
  background: var(--color-tier-kindred);
}
.tier--keepers .tier-info {
  background: var(--color-tier-keepers);
}
.tier--sages .shimmer-sages-base-20s {
  --shimmer-delay: 5.2s;
}
.tier--sages .tier-description,
.tier--sages .tier-member-count,
.tier--sages .tier-title {
  color: var(--color-night);
}
.tier-header-content {
  flex: 1;
  text-align: left;
}
.tier-title {
  color: var(--color-cloud);
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 var(--spacing-sm);
}
.tier-description,
.tier-member-count {
  color: #ffffffe6;
  font-size: 1.1rem;
  margin: 0;
  opacity: 0.9;
}
.tier--sages .tier-cta .btn--secondary {
  background: var(--color-forest);
  box-shadow: 0 4px 16px #2d6a4f59;
  color: var(--color-cloud);
}
.tier--sages .tier-cta .btn--secondary i {
  color: var(--color-cloud);
}
.tier--sages .tier-cta .btn--secondary:hover {
  background: var(--color-primary-light);
  box-shadow: 0 6px 24px #40916c73;
  color: var(--color-cloud);
}
.patron-sections {
  padding: var(--spacing-xl);
}
.no-supporters {
  color: var(--color-text-secondary);
  padding: 4rem var(--spacing-xl);
  text-align: center;
}
.no-supporters p {
  font-size: 1.1rem;
  font-style: italic;
}
.letter-navigation {
  align-items: center;
  backdrop-filter: blur(8px);
  background: rgba(var(--color-surface-rgb), 0.9);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-wrap: nowrap;
  gap: var(--spacing-sm);
  margin: 0;
  overflow-x: auto;
  padding: var(--spacing-md) var(--spacing-xl);
  position: sticky;
  scrollbar-color: var(--color-border) transparent;
  scrollbar-width: thin;
  top: 0;
  z-index: 10;
}
.letter-navigation::-webkit-scrollbar {
  height: 6px;
}
.letter-navigation::-webkit-scrollbar-track {
  background: transparent;
  margin: 0 var(--spacing-xl);
}
.letter-navigation::-webkit-scrollbar-thumb {
  background-color: var(--color-border);
  border-radius: var(--border-radius-full);
}
.letter-navigation::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-text-muted);
}
.letter-link {
  background: transparent;
  border: none;
  border-radius: var(--border-radius-pill);
  color: var(--color-text-muted);
  cursor: pointer;
  flex-shrink: 0;
  font-family: var(--font-family-heading);
  font-size: 1.1rem;
  font-weight: 500;
  min-width: 3rem;
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: center;
  text-decoration: none;
  transition: all var(--transition-normal);
}
.letter-link--present {
  color: var(--color-text-primary);
}
.letter-link--absent {
  opacity: 0.2;
  pointer-events: none;
}
.letter-link--active {
  background-color: var(--color-text-primary);
  color: var(--color-surface) !important;
  font-weight: 700;
  transform: scale(1.05);
}
.tier--kindred .letter-link--active,
.tier--kindred .letter-link--present:hover:not(.letter-link--active) {
  background-color: var(--color-tier-kindred);
}
.tier--keepers .letter-link--active,
.tier--keepers .letter-link--present:hover:not(.letter-link--active) {
  background-color: var(--color-tier-keepers);
}
.tier--sages .letter-link--active,
.tier--sages .letter-link--present:hover:not(.letter-link--active) {
  background-color: var(--color-tier-sages);
  color: var(--color-night) !important;
}
.letter-link--present:hover:not(.letter-link--active) {
  color: var(--color-night);
}
@media (max-width: 768px) {
  .active-tier-panel {
    border-radius: var(--border-radius-lg);
  }
  .tier-info {
    align-items: stretch;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
  }
  .tier-header-content {
    text-align: center;
  }
  .tier-title {
    font-size: 1.5rem;
  }
  .tier-description,
  .tier-member-count {
    font-size: 1rem;
  }
  .tier-cta {
    align-self: center;
  }
  .letter-navigation {
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
  }
  .letter-navigation::-webkit-scrollbar-track {
    margin: 0 var(--spacing-sm);
  }
  .letter-link {
    font-size: 1rem;
    min-width: 2.5rem;
    padding: var(--spacing-xs) var(--spacing-sm);
  }
  .patron-sections {
    padding: var(--spacing-lg);
  }
}
@media (prefers-reduced-motion: reduce) {
  .patron-tab-content {
    animation: none;
  }
}