/* ============================================================
 * Kanban — padrão visual unificado do app.
 * Usado por Projetos, CRM, e qualquer módulo futuro.
 *
 * Estrutura HTML esperada:
 *   .kanban-board[data-kanban-key="<scope>"]
 *     .kanban-col[data-stage-id][style="--kanban-col-color: <hex>"]
 *       .kanban-col__header
 *         button.kanban-col__toggle
 *         h2.kanban-col__title
 *         span.kanban-col__count
 *       .kanban-col__body.kanban-column[data-stage-id][id="stage-<id>"]
 *         <cards…>
 *       .kanban-col__empty (opcional, só quando não há itens)
 *
 * data-kanban-key define o namespace do localStorage do colapso.
 * ============================================================ */

.kanban-board {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    padding-bottom: 1rem;
    padding: 1rem;
    border-radius: 0.75rem;
    align-items: stretch;
}

.kanban-col {
    width: 300px;
    min-width: 300px;
    transition: width .18s ease, min-width .18s ease, max-width .18s ease;
    position: relative;
    border-radius: 0.5rem;
    background-color: rgb(255 255 255);
    border: 1px solid rgb(203 213 225);
    border-top: 3px solid var(--kanban-col-color, #64748b);
    box-shadow: 0 1px 4px rgb(0 0 0 / .07);
    display: flex;
    flex-direction: column;
    min-height: 60vh;
    max-height: calc(100vh - 12rem);
}

.dark .kanban-col {
    background-color: rgb(30 41 59);
    border-color: rgb(71 85 105);
}

.kanban-col__header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    padding: 0.75rem 0.75rem 0;
}

.kanban-col__toggle {
    transition: transform .18s ease;
    cursor: pointer;
    color: rgb(100 116 139);
    flex-shrink: 0;
    background: transparent;
    border: 0;
    padding: 0;
}
.kanban-col__toggle:hover { color: rgb(51 65 85); }
.dark .kanban-col__toggle:hover { color: rgb(226 232 240); }

.kanban-col__title {
    flex: 1;
    font-size: 0.875rem;
    font-weight: 600;
    color: rgb(51 65 85);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.dark .kanban-col__title { color: rgb(226 232 240); }

.kanban-col__count {
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
    padding: 0.125rem 0.625rem;
    color: white;
    background: var(--kanban-col-color, #64748b);
    flex-shrink: 0;
}

.kanban-col__body {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-height: 40vh;
    overflow-y: auto;
    padding: 0 0.75rem 0.75rem;
}

.kanban-col__empty {
    pointer-events: none;
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: rgb(148 163 184);
    font-style: italic;
}
.dark .kanban-col__empty { color: rgb(100 116 139); }

/* Estado colapsado: coluna fica como "lombada" vertical de 44px. */
.kanban-col--collapsed { width: 44px; min-width: 44px; max-width: 44px; }
.kanban-col--collapsed .kanban-col__header {
    flex-direction: column;
    padding: 0.5rem 0.25rem;
    margin-bottom: 0;
    height: 100%;
    gap: 0.5rem;
}
.kanban-col--collapsed .kanban-col__title {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    flex: 1;
    text-align: left;
    color: var(--kanban-col-color);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.kanban-col--collapsed .kanban-col__toggle i { transform: rotate(-90deg); }
.kanban-col--collapsed .kanban-col__body { display: none; }
.kanban-col--collapsed .kanban-col__empty { display: none; }
.kanban-col--collapsed .kanban-col__count {
    padding: 0.125rem 0.5rem;
    font-size: 0.7rem;
}