/* =====================================================
   ACTIVITIES TAB - Activity Filters, Table, List
   Mobile-first responsive with centralized colors
   ===================================================== */

#activities-tab.active {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
}

@media (min-width: 768px) {
    #activities-tab.active {
        padding: var(--spacing-md);
    }
}

.act-filters {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.act-filter-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-md);
}

.act-filter-label {
    display: flex;
    flex-direction: column;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-medium);
    gap: var(--spacing-xs);
}

.act-filter-label select,
.act-filter-label input[type="text"],
.act-filter-label input[type="date"],
.act-filter-label input[type="number"] {
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-page);
    color: inherit;
    min-width: 0;
    transition: border-color var(--transition-fast);
}

.act-filter-label select:focus,
.act-filter-label input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(252, 76, 2, 0.1);
}

.act-filter-label select {
    min-width: 130px;
}

.act-filter-label input[type="text"] {
    width: 145px;
}

.act-filter-label input[type="date"] {
    width: 140px;
}

.act-filter-label input[type="number"] {
    width: 68px;
}

.act-range-pair {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-normal);
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

.act-filter-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: auto;
    flex-wrap: wrap;
}

.act-edit-btn,
.act-reset-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    cursor: pointer;
    color: var(--color-text-medium);
    transition: all var(--transition-fast);
    font-weight: var(--font-weight-medium);
}

.act-edit-btn:hover {
    background: var(--color-bg-hover);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.act-reset-btn:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.act-col-editor {
    border-top: 1px dashed var(--color-border);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
}

.act-col-editor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-sm);
}

.act-col-option {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-medium);
}

#act-counter {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.act-export-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    color: var(--color-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: var(--font-weight-medium);
}

.act-export-btn:hover {
    background: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

/* ─── Activities Table ─────────────────────── */
#activities-table.df-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

#activities-table.df-table th {
    background: var(--color-bg-hover);
    color: var(--color-text-dark);
    font-weight: var(--font-weight-semibold);
    padding: var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

#activities-table.df-table th.sortable {
    cursor: pointer;
    white-space: nowrap;
    user-select: none;
    transition: background var(--transition-fast);
}

#activities-table.df-table th.sortable:hover {
    background: var(--color-border);
}

#activities-table.df-table th.act-sort-active {
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
}

.act-name-link {
    color: inherit;
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
}

.act-name-link:hover {
    text-decoration: underline;
    color: var(--color-primary);
}

.act-empty {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-light);
    font-style: italic;
    grid-column: 1 / -1;
}

#activities-table.df-table td small {
    opacity: 0.8;
    font-size: var(--font-size-xs);
}

/* ─── Sortable Headers ─────────────────────── */
th[data-sort] {
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
    position: relative;
}

th[data-sort]:hover {
    background: rgba(0, 0, 0, .05);
}

th[data-sort]::after {
    content: ' ⇅';
    opacity: .3;
    font-size: .75em;
}

th[data-sort].sort-asc::after {
    content: ' ▲';
    opacity: .8;
    font-size: .7em;
}

th[data-sort].sort-desc::after {
    content: ' ▼';
    opacity: .8;
    font-size: .7em;
}

/* ─── General Tables ───────────────────────── */
.df-table {
    border-collapse: collapse;
    width: 100%;
    font-size: 0.95em;
    margin-top: 1rem;
}

.df-table th,
.df-table td {
    border: 1px solid #ddd;
    padding: 8px 10px;
    text-align: left;
}

.df-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: var(--text-medium);
}

.df-table tr:nth-child(even) {
    background: #fdfdfd;
}

/* ─── Responsive ───────────────────────────── */
@media (max-width: 768px) {
    .act-filters {
        padding: 0.6rem 0.8rem;
        gap: 0.4rem;
    }

    .act-filter-row {
        gap: 0.45rem 0.85rem;
    }

    .act-filter-label {
        font-size: 0.7rem;
    }

    .act-filter-label select,
    .act-filter-label input[type="text"],
    .act-filter-label input[type="date"],
    .act-filter-label input[type="number"] {
        font-size: 0.8rem;
        padding: 0.2rem 0.35rem;
    }

    .act-filter-label select {
        min-width: 110px;
    }

    .act-filter-label input[type="text"] {
        width: 120px;
    }

    .act-filter-label input[type="date"] {
        width: 115px;
    }

    .act-col-editor-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 0.2rem 0.6rem;
    }

    .act-col-option {
        font-size: 0.75rem;
    }

    #activities-table.df-table th,
    #activities-table.df-table td {
        padding: 6px 8px;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .act-filters {
        flex-direction: column;
        gap: 0.35rem;
    }

    .act-filter-row {
        flex-direction: column;
        gap: 0.3rem 0;
    }

    .act-filter-label {
        width: 100%;
    }

    .act-filter-label select,
    .act-filter-label input[type="text"],
    .act-filter-label input[type="date"],
    .act-filter-label input[type="number"] {
        width: 100% !important;
        min-width: 0 !important;
    }

    .act-reset-btn,
    .act-edit-btn {
        width: 100%;
    }

    .act-col-editor-grid {
        grid-template-columns: 1fr;
    }

    #activities-table {
        font-size: 0.8rem;
    }

    #activities-table.df-table th,
    #activities-table.df-table td {
        padding: 5px 6px;
    }
}