/* ============================================================
   Collections Tab
   ============================================================ */

.collections-tab {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem 0;
    min-height: 300px;
}

.collections-toolbar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border-primary);
    background: color-mix(in srgb, var(--background-primary) 25%, transparent);
    flex-shrink: 0;
}

.collections-tab-intro {
    flex: 1 1 0;
    font-size: var(--font-size-controls);
    color: var(--text-secondary);
    margin: 0;
}

/* ── List ── */

.collections-list {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-primary);
    background: color-mix(in srgb, var(--background-primary) 25%, transparent);
}

.collections-list:empty {
    display: none;
    border: none;
}

.collection-item {
    border-bottom: 1px solid var(--border-primary);
}

.collection-item:last-child {
    border-bottom: none;
}

.collection-item-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.75rem;
    min-height: 2.5rem;
    background: var(--background-primary);
}

.collection-drag-handle {
    flex-shrink: 0;
    cursor: default;
    color: var(--text-tertiary);
    font-size: 1rem;
    user-select: none;
    opacity: 0.4;
}

.collection-item-icon {
    flex-shrink: 0;
    font-size: 1rem;
    width: 1.4rem;
    text-align: center;
}

.collection-item-name {
    flex: 1 1 0;
    min-width: 0;
    font-size: var(--font-size-text);
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.collection-item-logic {
    flex-shrink: 0;
    font-size: var(--font-size-controls);
    color: var(--text-tertiary);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.collection-item-rules {
    flex-shrink: 0;
    font-size: var(--font-size-controls);
    color: var(--text-tertiary);
    white-space: nowrap;
}

/* ── Empty state ── */

.collections-empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-primary);
    padding: 2rem;
    text-align: center;
}

.collections-empty-state p {
    margin: 0;
    font-size: var(--font-size-text);
    color: var(--text-tertiary);
    max-width: 360px;
}

/* ── Edit panel ── */

.collections-edit-panel {
    border: 1px solid var(--border-primary);
    background: var(--background-secondary);
}

.collections-edit-header {
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--border-primary);
    background: var(--background-primary);
}

.collections-edit-title {
    margin: 0;
    font-size: var(--font-size-text);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.collections-edit-body {
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.col-edit-icon-input {
    max-width: 5rem;
}

.collections-edit-actions {
    display: flex;
    gap: 0.5rem;
    padding: 0.6rem 0.75rem;
    border-top: 1px solid var(--border-primary);
}

/* ── Rules ── */

.col-rules-list {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 0.5rem;
}

.col-rule-row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.col-rule-field {
    flex: 0 0 auto;
    width: 7rem;
    min-width: 0;
}

.col-rule-op {
    flex: 0 0 auto;
    width: 6rem;
    min-width: 0;
}

.col-rule-value {
    flex: 1 1 0;
    min-width: 0;
}

.col-rule-remove {
    flex: 0 0 auto;
}

.col-add-rule-btn {
    align-self: flex-start;
}