.kanban-shell {
  display: flex;
  flex-direction: column;
  gap: var(--space-2, 8px);
  container-type: inline-size;
}

.kanban-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2, 8px);
}

.kanban-toolbar__title {
  font: 700 0.78rem var(--font-ui, 'DM Sans', sans-serif);
  letter-spacing: 0.02em;
  color: var(--text-secondary, #475569);
}

.kanban-expand-btn {
  min-height: 0;
  border: 1px solid var(--line-soft, rgba(148, 163, 184, 0.4));
  border-radius: var(--radius-sm, 12px);
  background: #fff;
  color: var(--text-secondary, #475569);
  cursor: pointer;
  font: 700 0.72rem var(--font-ui, 'DM Sans', sans-serif);
  padding: 0.3rem 0.7rem;
  transition: background var(--trans-fast, 140ms ease), border-color var(--trans-fast, 140ms ease), color var(--trans-fast, 140ms ease);
}

.kanban-expand-btn:hover {
  background: var(--bg-muted, #f4f7ff);
  border-color: var(--accent-indigo, #4F6AE8);
  color: var(--accent-indigo, #4F6AE8);
}

.kanban {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(232px, 1fr);
  align-items: start;
  gap: var(--space-3, 12px);
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  padding-bottom: var(--space-1, 4px);
}

@container (max-width: 560px) {
  .kanban { grid-auto-columns: 76%; }
}

@container (max-width: 380px) {
  .kanban { grid-auto-columns: 88%; }
}

.kanban-column {
  display: flex;
  flex-direction: column;
  min-width: 0;
  scroll-snap-align: start;
  border: 1px solid var(--line-soft, rgba(148, 163, 184, 0.28));
  border-top: 3px solid color-mix(in srgb, #64748b 55%, transparent);
  border-radius: var(--radius-sm, 12px);
  background: rgba(248, 250, 252, 0.78);
  overflow: hidden;
}

.kanban-column[data-kanban-column="doing"]     { border-top-color: color-mix(in srgb, #06B6D4 80%, transparent); }
.kanban-column[data-kanban-column="blocked"]   { border-top-color: color-mix(in srgb, #ef4444 80%, transparent); }
.kanban-column[data-kanban-column="in_review"] { border-top-color: color-mix(in srgb, #f59e0b 85%, transparent); }
.kanban-column[data-kanban-column="done"]      { border-top-color: color-mix(in srgb, #22c55e 80%, transparent); }

.kanban-column header {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2, 8px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.24);
  background: #fbfcfe;
  padding: 0.5rem 0.65rem;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-secondary, #475569);
}

.kanban-column[data-kanban-column="doing"]     header { background: color-mix(in srgb, #06B6D4 7%, #fbfcfe); }
.kanban-column[data-kanban-column="blocked"]   header { background: color-mix(in srgb, #ef4444 7%, #fbfcfe); }
.kanban-column[data-kanban-column="in_review"] header { background: color-mix(in srgb, #f59e0b 8%, #fbfcfe); }
.kanban-column[data-kanban-column="done"]      header { background: color-mix(in srgb, #22c55e 7%, #fbfcfe); }

.kanban-column header strong {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.08);
  color: var(--text-secondary, #475569);
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
}

.kanban-column__body {
  display: flex;
  min-height: 60px;
  max-height: 46vh;
  flex-direction: column;
  gap: var(--space-2, 8px);
  padding: var(--space-2, 8px) 0.6rem 0.6rem;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.kanban-card {
  border: 1px solid rgba(99, 102, 241, 0.18);
  border-radius: var(--radius-sm, 12px);
  background: #fff;
  box-shadow: var(--shadow-1, 0 1px 2px rgba(15, 23, 42, 0.06));
  cursor: grab;
  padding: 0.6rem 0.66rem;
  transition: box-shadow var(--trans-fast, 140ms ease), transform var(--trans-fast, 140ms ease), border-color var(--trans-fast, 140ms ease);
}

.kanban-card:hover:not(.kanban-card--chosen):not(.kanban-card--drag):not(.kanban-card--ghost) {
  transform: translateY(-2px);
  border-color: rgba(79, 106, 232, 0.45);
  box-shadow: 0 6px 18px rgba(79, 106, 232, 0.16);
}

.kanban-card:focus-visible {
  outline: 2px solid var(--accent-indigo, #4F6AE8);
  outline-offset: 2px;
}

.kanban-card--chosen {
  border-color: rgba(99, 102, 241, 0.45);
  cursor: grabbing;
  transform: none;
}

.kanban-card--ghost {
  opacity: 0.48;
}

.kanban-card--drag {
  box-shadow: var(--shadow-2, 0 20px 38px rgba(16, 26, 45, 0.16));
  cursor: grabbing;
}

.kanban-card strong,
.kanban-card small,
.kanban-card span {
  display: block;
}

.kanban-card span {
  font-variant-numeric: tabular-nums;
}

.kanban-card small,
.kanban-empty {
  color: #667085;
  font-size: 0.76rem;
}

.kanban-fullscreen-backdrop {
  position: fixed;
  inset: 0;
  z-index: 10010;
  background: rgba(5, 7, 18, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.kanban-fullscreen-backdrop .kanban-shell {
  width: min(1200px, 100%);
  max-height: 86vh;
  background: var(--bg-surface, #fff);
  border-radius: var(--radius-md, 16px);
  box-shadow: var(--shadow-2, 0 20px 38px rgba(16, 26, 45, 0.16));
  padding: 1.1rem 1.25rem;
}

.kanban-fullscreen-backdrop .kanban {
  grid-auto-columns: minmax(240px, 1fr);
}

.kanban-fullscreen-backdrop .kanban-column__body {
  max-height: 64vh;
}

@media (prefers-reduced-motion: reduce) {
  .kanban-card,
  .kanban-card:hover:not(.kanban-card--chosen):not(.kanban-card--drag):not(.kanban-card--ghost) {
    transition: none;
    transform: none;
  }
}