.brandnamenerd-theme-accordion {
  position: relative;
  margin: clamp(2rem, 6vw, 4rem) 0;
  padding: clamp(1.5rem, 5vw, 2.75rem);
  border-radius: var(--bnn-radius-lg);
  box-shadow: var(--bnn-shadow-soft);
  overflow: hidden;
}

.brandnamenerd-theme-accordion::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(120deg, color-mix(in srgb, var(--bnn-rose) 18%, transparent) 0%, transparent 55%, color-mix(in srgb, var(--bnn-teal) 18%, transparent) 100%);
  opacity: 0.25;
}

.brandnamenerd-theme-accordion__container {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1rem, 3vw, 1.5rem);
}

.brandnamenerd-theme-accordion .accordion {
  border-radius: var(--bnn-radius-lg);
  border: 1px solid color-mix(in srgb, var(--bnn-navy) 12%, transparent);
  background: var(--bnn-surface-card);
  backdrop-filter: blur(10px);
  box-shadow: 0 1.1rem 2.5rem color-mix(in srgb, var(--bnn-navy) 16%, transparent);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
  overflow: hidden;
}

.brandnamenerd-theme-accordion .accordion:last-of-type {
  margin-bottom: 0;
}

.brandnamenerd-theme-accordion details[open] {
  transform: translateY(-2px);
  box-shadow: 0 1.75rem 3.25rem color-mix(in srgb, var(--bnn-navy) 20%, transparent);
}

.brandnamenerd-theme-accordion .accordion__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(0.75rem, 2vw, 1.25rem);
  padding: clamp(1rem, 2.6vw, 1.35rem) clamp(1rem, 3vw, 1.75rem);
  font-family: var(--font-heading), ui-serif, Georgia, serif;
  font-size: clamp(1.1rem, 2vw, 1.25rem);
  font-weight: 600;
  color: var(--bnn-surface-card-text);
  cursor: pointer;
  list-style: none;
  position: relative;
  background: transparent;
  transition: color 0.3s ease;
}

.brandnamenerd-theme-accordion .accordion__summary::-webkit-details-marker {
  display: none;
}

.brandnamenerd-theme-accordion .accordion__summary::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: color-mix(in srgb, var(--bnn-gold) 35%, transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.brandnamenerd-theme-accordion .accordion__icon {
  flex-shrink: 0;
  width: 1.1rem;
  height: 1.1rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.25s ease;
}

.brandnamenerd-theme-accordion details[open] .accordion__icon {
  transform: rotate(-135deg);
}

.brandnamenerd-theme-accordion .accordion__content {
  padding: clamp(1rem, 2.5vw, 1.5rem) clamp(1rem, 3vw, 1.75rem);
  font-family: var(--font-body), ui-monospace, Menlo, monospace;
  font-size: clamp(0.95rem, 2vw, 1.05rem);
  line-height: 1.6;
  color: var(--bnn-surface-card-text);
  background: var(--bnn-surface-card);
  border-top: 1px solid color-mix(in srgb, var(--bnn-navy) 12%, transparent);
}

.brandnamenerd-theme-accordion .accordion__content p:last-child {
  margin-bottom: 0;
}

.brandnamenerd-theme-accordion .accordion__summary:hover,
.brandnamenerd-theme-accordion .accordion__summary:focus-visible,
.brandnamenerd-theme-accordion details[open] .accordion__summary {
  color: var(--bnn-surface-card-text);
}

.brandnamenerd-theme-accordion .accordion__summary:hover::before,
.brandnamenerd-theme-accordion .accordion__summary:focus-visible::before,
.brandnamenerd-theme-accordion details[open] .accordion__summary::before {
  opacity: 0.35;
}

.brandnamenerd-theme-accordion .accordion__summary:focus-visible {
  outline: 3px solid var(--bnn-focus);
  outline-offset: 3px;
  box-shadow: 0 0 0 0.2rem color-mix(in srgb, var(--bnn-gold) 45%, transparent);
}

@media (max-width: 768px) {
  .brandnamenerd-theme-accordion {
    padding: clamp(1.25rem, 8vw, 2rem);
  }

  .brandnamenerd-theme-accordion .accordion__summary {
    align-items: flex-start;
  }
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .brandnamenerd-theme-accordion .accordion {
    background: var(--bnn-surface-card);
  }
}