.crb-intro {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-7) var(--space-5);
  border-bottom: 3px solid var(--accent);
}

.crb-intro .wrap {
  position: relative;
  z-index: 1;
}

.crb-intro h1 {
  margin: 0 0 var(--space-3);
  max-width: 16ch;
}

.crb-intro__lede {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  line-height: 1.3;
  max-width: 52ch;
  color: var(--fg-soft);
  margin: 0 0 var(--space-3);
}

.crb-intro__neighbor {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: var(--muted);
}

.crb-intro__neighbor a {
  color: var(--accent);
}

.crb-toolbar {
  position: sticky;
  top: 0;
  z-index: 6;
  padding-block: var(--space-3);
  background: var(--bg);
  border-bottom: 1px dashed var(--border-strong, rgba(255, 255, 255, 0.18));
}

.crb-toolbar .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.crb-counts,
.crb-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.crb-counts {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.crb-counts strong {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  color: var(--accent);
  letter-spacing: 0;
}

.crb-board {
  display: grid;
  grid-template-columns: minmax(18rem, 24rem) 1fr;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-3) var(--space-7);
  max-width: 100rem;
  margin-inline: auto;
}

.crb-pool,
.crb-bucket {
  background: var(--bg-elevated);
  border: 1px solid var(--muted);
  min-width: 0;
}

.crb-pool {
  align-self: start;
  display: grid;
  gap: var(--space-2);
  padding: var(--space-3);
  max-height: calc(100vh - 9rem);
  overflow: auto;
}

.crb-pool.is-over,
.crb-bucket__drop.is-over {
  outline: 3px solid var(--accent);
  outline-offset: -3px;
}

.crb-pool__head {
  display: grid;
  gap: var(--space-1);
  padding-bottom: var(--space-2);
  border-bottom: 1px dashed var(--border-strong, rgba(255, 255, 255, 0.18));
}

.crb-pool__head p {
  margin: 0;
}

.crb-buckets {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}

.crb-bucket {
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 34rem;
}

.crb-bucket header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-3);
  border-bottom: 3px solid var(--accent);
}

.crb-bucket h2 {
  margin: 0;
  font-size: var(--fs-xl);
}

.crb-bucket__mark {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.18em;
  color: var(--accent);
}

.crb-bucket__drop {
  display: grid;
  align-content: start;
  gap: var(--space-2);
  padding: var(--space-3);
  min-height: 20rem;
}

.crb-card {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--bg);
  border: 1px solid var(--border-strong, rgba(255, 255, 255, 0.18));
  cursor: grab;
}

.crb-card:hover,
.crb-card:focus-within {
  border-color: var(--accent);
}

.crb-card.is-dragging {
  opacity: 0.48;
}

.crb-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.crb-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-md);
  line-height: 1.15;
}

.crb-card p {
  margin: 0;
  color: var(--fg-soft);
  font-size: var(--fs-sm);
  line-height: 1.45;
}

.crb-card__moves {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.35rem;
}

.crb-card__moves button {
  min-width: 0;
  padding: 0.35rem 0.25rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-soft);
  background: transparent;
  border: 1px solid var(--muted);
  cursor: pointer;
}

.crb-card__moves button:hover,
.crb-card__moves button:focus-visible,
.crb-card__moves button[aria-pressed="true"] {
  color: var(--accent-ink);
  background: var(--accent);
  border-color: var(--accent);
  outline: none;
}

.crb-empty {
  margin: 0;
  padding: var(--space-3);
  border: 1px dashed var(--muted);
  font-family: var(--font-display);
  font-style: italic;
  color: var(--muted);
}

@media (max-width: 70rem) {
  .crb-board {
    grid-template-columns: 1fr;
  }

  .crb-pool {
    max-height: none;
  }
}

@media (max-width: 48rem) {
  .crb-toolbar {
    position: static;
  }

  .crb-toolbar .wrap,
  .crb-actions {
    align-items: stretch;
  }

  .crb-actions,
  .crb-actions .btn {
    width: 100%;
  }

  .crb-buckets {
    grid-template-columns: 1fr;
  }

  .crb-bucket {
    min-height: 0;
  }

  .crb-card {
    cursor: default;
  }
}