/* ========================================
   Marked OS — Kanban Board
   ======================================== */

.kanban-board {
    display: flex;
    gap: var(--space-3);
    overflow-x: auto;
    padding-bottom: var(--space-4);
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    min-height: 400px;
}

.kanban-column {
    min-width: 280px;
    max-width: 320px;
    flex-shrink: 0;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-3);
    scroll-snap-align: start;
    display: flex;
    flex-direction: column;
    transition: background var(--transition-fast);
}

.kanban-column.drag-over {
    background: var(--primary-50);
    border: 2px dashed var(--primary-200);
}

.kanban-col-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) var(--space-2) var(--space-3);
}

.col-header-left {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.col-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.kanban-col-header h4 {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
}

.col-count {
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 1px 8px;
    border-radius: var(--radius-full);
}

.kanban-cards {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    flex: 1;
    min-height: 60px;
}

.kanban-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    padding: var(--space-3);
    cursor: grab;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-xs);
    animation: fadeInUp 0.25s ease;
}

.kanban-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-200);
    transform: translateY(-1px);
}

.kanban-card:active {
    cursor: grabbing;
    box-shadow: var(--shadow-lg);
    transform: rotate(1deg) scale(1.02);
}

.kanban-card-title {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    margin-bottom: var(--space-2);
    line-height: var(--leading-normal);
}

.kanban-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.kanban-card-tags {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    margin-bottom: var(--space-2);
}

.kanban-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-2);
}

.kanban-card-due {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.kanban-card-due svg {
    width: 12px;
    height: 12px;
}

.kanban-card-due.overdue {
    color: var(--danger);
    font-weight: var(--font-medium);
}

.kanban-card-assignee {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: white;
    font-size: 9px;
    font-weight: var(--font-bold);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Mobile: full-width columns */
@media (max-width: 639px) {
    .kanban-board {
        flex-direction: column;
    }

    .kanban-column {
        min-width: 100%;
        max-width: 100%;
    }
}