/* Breadcrumb: desktop hidden, mobile visible */
.mobile-breadcrumb { display: none; }

@media (max-width: 768px) {
    .mobile-breadcrumb {
        display: flex;
        align-items: center;
        gap: 0.25rem;
        padding: 0.625rem 1rem;
        background: var(--lts-light);
        border-bottom: 1px solid var(--lts-border);
        font-size: 0.8125rem;
        flex-shrink: 0;
        overflow-x: auto;
        white-space: nowrap;
    }
    .mobile-breadcrumb .crumb {
        color: var(--lts-text-secondary);
        cursor: pointer;
        padding: 0.25rem 0;
    }
    .mobile-breadcrumb .crumb:hover { color: var(--lts-accent); }
    .mobile-breadcrumb .crumb.active {
        color: var(--lts-dark);
        font-weight: 600;
        cursor: default;
    }
    .mobile-breadcrumb .sep {
        color: var(--lts-text-secondary);
        opacity: 0.4;
        font-size: 0.75rem;
    }
    .back-btn { display: none; }
}
/* explica — Finder column navigation */

.finder {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 65px);
    overflow: hidden;
}

/* Filter bar */
.finder-filters {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    background: var(--lts-light);
    border-bottom: 1px solid var(--lts-border);
    flex-shrink: 0;
}

.filter-search {
    flex: 1;
    max-width: 300px;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--lts-border);
    border-radius: 6px;
    font-family: var(--font-body);
    font-size: 0.8125rem;
    background: var(--lts-bg);
}

.filter-search:focus {
    outline: none;
    border-color: var(--lts-accent);
}

.filter-select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--lts-border);
    border-radius: 6px;
    font-family: var(--font-body);
    font-size: 0.8125rem;
    background: var(--lts-light);
    cursor: pointer;
}

.filter-select:focus {
    outline: none;
    border-color: var(--lts-accent);
}

.btn-new {
    margin-left: auto;
    white-space: nowrap;
}

/* Column layout */
.finder-columns {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.finder-column {
    width: 220px;
    min-width: 180px;
    border-right: 1px solid var(--lts-border);
    display: flex;
    flex-direction: column;
    background: var(--lts-light);
    flex-shrink: 0;
}

.finder-column-wide {
    flex: 1;
    width: auto;
    min-width: 0;
    background: var(--lts-bg);
}

.column-header {
    padding: 0.625rem 1rem;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--lts-text-secondary);
    border-bottom: 1px solid var(--lts-border);
    background: var(--lts-bg);
    flex-shrink: 0;
}

.column-items {
    flex: 1;
    overflow-y: auto;
}

.column-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    cursor: pointer;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    transition: background 0.15s;
    font-size: 0.875rem;
}

.column-item:hover {
    background: rgba(0, 0, 0, 0.03);
}

.column-item.active {
    background: rgba(253, 152, 64, 0.08);
    color: var(--lts-dark);
    font-weight: 600;
}

.column-item.drag-over {
    background: rgba(253, 152, 64, 0.15);
}

.item-icon {
    flex-shrink: 0;
    color: var(--lts-text-secondary);
    display: flex;
    align-items: center;
}

.column-item.active .item-icon {
    color: var(--lts-accent);
}

.item-label {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.item-count {
    font-size: 0.6875rem;
    color: var(--lts-text-secondary);
    background: rgba(0, 0, 0, 0.05);
    padding: 0.1rem 0.4rem;
    border-radius: 10px;
    flex-shrink: 0;
}

.item-arrow {
    color: var(--lts-text-secondary);
    font-size: 1.125rem;
    flex-shrink: 0;
    opacity: 0.4;
}

.column-empty {
    padding: 2rem 1rem;
    text-align: center;
    color: var(--lts-text-secondary);
    font-size: 0.8125rem;
}

/* Item cards (Column 3) */
.item-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--lts-light);
    border: 1px solid var(--lts-border);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin: 0.5rem 1rem;
    transition: box-shadow 0.2s, opacity 0.2s;
    cursor: default;
}

.item-card:first-child {
    margin-top: 1rem;
}

.item-card:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.item-card.dragging {
    opacity: 0.4;
}

.item-card-info {
    flex: 1;
    min-width: 0;
}

.item-card-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.125rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.item-card-subtitle {
    font-size: 0.8125rem;
    color: var(--lts-text-secondary);
    margin-bottom: 0.375rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.item-card-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.6875rem;
    color: var(--lts-text-secondary);
    flex-wrap: wrap;
}

.item-card-actions {
    display: flex;
    gap: 0.375rem;
    flex-shrink: 0;
    margin-left: 1rem;
    align-items: center;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
}



/* ============================================
   Desktop: hide mobile-only elements
   ============================================ */
.back-btn { display: none; }
.more-menu { display: none; }

/* ============================================
   Mobile: drill-down navigation
   ============================================ */
@media (max-width: 768px) {
    .finder {
        height: calc(100vh - 65px);
        overflow: hidden;
    }

    .finder-filters {
        flex-wrap: wrap;
        padding: 0.5rem 1rem;
    }

    .filter-search {
        max-width: 100%;
        order: -1;
        flex-basis: 100%;
    }

    .finder-columns {
        flex: 1;
        position: relative;
        overflow: hidden;
    }

    /* All columns: hidden by default, full screen when active */
    .finder-column {
        display: none;
        width: 100%;
        min-width: 0;
        border-right: none;
        flex-direction: column;
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        overflow-y: auto;
        background: var(--lts-bg);
    }

    .finder-column.mobile-active {
        display: flex;
        position: relative;
    }

    .column-items {
        max-height: none;
        flex: 1;
    }

    .column-item {
        padding: 0.875rem 1rem;
        font-size: 1rem;
    }

    /* Back button */
    .back-btn {
        display: flex;
        align-items: center;
        gap: 0.375rem;
        padding: 0.625rem 1rem;
        color: var(--lts-accent);
        font-size: 0.875rem;
        font-weight: 500;
        cursor: pointer;
        border: none;
        background: none;
        border-bottom: 1px solid var(--lts-border);
        font-family: var(--font-body);
    }

    .back-btn svg {
        width: 16px;
        height: 16px;
    }

    /* Cards: full width, clean layout */
    .item-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
        margin: 0.375rem 0.75rem;
        padding: 0.875rem 1rem;
    }

    .item-card-title {
        white-space: normal;
        font-size: 1.0625rem;
    }

    .item-card-subtitle {
        white-space: normal;
    }

    /* Actions: Presentar full width, rest below */
    .item-card-actions {
        margin-left: 0;
        width: 100%;
        flex-wrap: wrap;
        gap: 0.375rem;
    }

    .item-card-actions .btn-primary {
        flex: 1 0 100%;
    }

    .item-card-actions .btn-secondary,
    .item-card-actions .btn-delete-item {
        flex: 1 1 calc(25% - 0.3rem);
        text-align: center;
        font-size: 0.75rem;
        display: inline-flex !important;
        justify-content: center;
    }

    .more-menu { display: none !important; }

    /* Header: compact on mobile */
    .app-header {
        padding: 0.75rem 1rem;
    }

    .header-link:first-child {
        display: none;
    }
}