/* ── 1.2 Multi-Select ── */
.doc-card-checkbox {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 11;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-card);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s ease, border-color 0.15s ease, background 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.doc-card:hover .doc-card-checkbox,
.doc-card.selected .doc-card-checkbox,
.doc-list-row:hover .doc-card-checkbox,
.doc-list-row.selected .doc-card-checkbox {
  opacity: 1;
}

.doc-card.selected .doc-card-checkbox,
.doc-list-row.selected .doc-card-checkbox {
  background: #1a73e8;
  border-color: #1a73e8;
}

.doc-card.selected .doc-card-checkbox::after,
.doc-list-row.selected .doc-card-checkbox::after {
  content: '';
  width: 10px;
  height: 6px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(-45deg) translateY(-1px);
}

.doc-card.selected {
  background: #f0f6ff;
  box-shadow: var(--shadow-card, 0 3px 8px rgba(34, 48, 62, 0.1));
}

.doc-list-row.selected {
  background: #f0f6ff;
}

[data-theme="dark"] .doc-card.selected {
  background: rgba(26, 115, 232, 0.08);
}

[data-theme="dark"] .doc-list-row.selected {
  background: rgba(26, 115, 232, 0.08);
}

[data-theme="dark"] .doc-card.selected .doc-card-checkbox,
[data-theme="dark"] .doc-list-row.selected .doc-card-checkbox {
  background: #4da3ff;
  border-color: #4da3ff;
}

/* Action bar always visible on mobile */
@media (max-width: 767px) {
  .doc-card .doc-card-actions {
    opacity: 1;
  }
}

/* Selection bar */
.doc-selection-bar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px) saturate(1.6);
  -webkit-backdrop-filter: blur(16px) saturate(1.6);
  color: var(--color-text-primary);
  padding: 6px 6px 6px 6px;
  border-radius: 100px;
  border: 0.5px solid rgba(31, 31, 30, 0.15);
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-family);
  box-shadow:
    0 4px 6px -1px rgba(0, 0, 0, 0.07),
    0 12px 24px -4px rgba(0, 0, 0, 0.12),
    0 0 0 0.5px rgba(0, 0, 0, 0.03);
  z-index: 450;
  opacity: 0;
  pointer-events: none;
  transition:
    transform 0.35s cubic-bezier(0.32, 0.72, 0, 1),
    opacity 0.25s ease;
}

.doc-selection-bar.active {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.doc-selection-count {
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  white-space: nowrap;
  padding: 6px 16px 6px 14px;
  margin-right: 4px;
  border-right: 0.5px solid rgba(0, 0, 0, 0.08);
  line-height: 1;
  user-select: none;
}

.doc-selection-actions {
  display: flex;
  align-items: center;
  gap: 2px;
}

.doc-selection-actions button {
  padding: 7px 14px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-lg);
  min-height: 34px;
  cursor: pointer;
  font-family: var(--font-family);
  border: none;
  background: transparent;
  color: var(--color-text-primary);
  white-space: nowrap;
  line-height: 1;
  transition: background 0.15s ease, color 0.15s ease;
}

.doc-selection-actions button:hover {
  background: rgba(128, 128, 128, 0.09);
}

.doc-selection-actions button:active {
  background: rgba(128, 128, 128, 0.14);
  transition-duration: 50ms;
}

.doc-sel-delete {
  color: var(--color-text-primary);
}

.doc-sel-delete:hover {
  background: rgba(220, 53, 69, 0.07);
  color: #dc2626;
}

.doc-sel-cancel {
  color: var(--color-text-secondary);
  font-weight: 500;
}

.doc-sel-cancel:hover {
  color: var(--color-text-primary);
}

[data-theme="dark"] .doc-selection-bar {
  background: rgba(26, 32, 53, 0.78);
  box-shadow:
    0 4px 6px -1px rgba(0, 0, 0, 0.2),
    0 12px 24px -4px rgba(0, 0, 0, 0.35),
    0 0 0 1px rgba(255, 255, 255, 0.04);
}

[data-theme="dark"] .doc-sel-delete:hover {
  background: rgba(241, 112, 122, 0.1);
  color: #f1707a;
}

@media (max-width: 767px) {
  .doc-selection-bar {
    bottom: 16px;
    left: 12px;
    right: 12px;
    transform: translateX(0) translateY(16px);
    width: auto;
    padding: 5px;
    border-radius: var(--radius-lg);
  }
  .doc-selection-bar.active {
    transform: translateX(0) translateY(0);
  }
  .doc-selection-count {
    font-size: var(--font-size-xs);
    padding: 5px 12px 5px 10px;
  }
  .doc-selection-actions button {
    font-size: var(--font-size-xs);
    padding: 6px 10px;
  }
}