/* ================================================================
   ArtiGrid Advanced Filter Panel
   ================================================================ */

.artigrid-filter-panel {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,.07);
    margin-bottom: 1rem;
    overflow: hidden;
    transition: box-shadow .2s;
}
.artigrid-filter-panel:focus-within {
    box-shadow: 0 6px 28px rgba(0,0,0,.11);
}

/* Header */
.artigrid-filter-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .75rem 1.1rem;
    background: #f8fafc;
    border-bottom: 1px solid #e2e8f0;
    cursor: pointer;
    user-select: none;
    gap: .5rem;
}
.artigrid-filter-header-left {
    display: flex;
    align-items: center;
    gap: .55rem;
    font-weight: 600;
    font-size: .9rem;
    color: #374151;
}
.artigrid-filter-header-left i { color: #6366f1; font-size: 1rem; }
.artigrid-filter-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #6366f1;
    color: #fff;
    border-radius: 20px;
    font-size: .7rem;
    font-weight: 700;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    margin-left: 2px;
    transition: transform .2s;
}
.artigrid-filter-badge.hidden { display: none; }
.artigrid-filter-toggle-icon {
    color: #9ca3af;
    transition: transform .25s;
    font-size: .8rem;
}
.artigrid-filter-panel.is-open .artigrid-filter-toggle-icon {
    transform: rotate(180deg);
}

/* Body */
.artigrid-filter-body {
    display: none;
    padding: 1.1rem 1.2rem 1rem;
    animation: afgSlideDown .18s ease;
}
.artigrid-filter-panel.is-open .artigrid-filter-body {
    display: block;
}
@keyframes afgSlideDown {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Grid layout for filter rows */
.artigrid-filter-rows {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: .75rem 1rem;
    margin-bottom: .9rem;
}

/* Each filter field */
.artigrid-filter-field {
    display: flex;
    flex-direction: column;
    gap: .3rem;
}
.artigrid-filter-field label {
    font-size: .78rem;
    font-weight: 600;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: .04em;
    margin: 0;
}
.artigrid-filter-field .form-control,
.artigrid-filter-field .form-select {
    font-size: .85rem;
    border-radius: 6px;
    border-color: #d1d5db;
    padding: .35rem .65rem;
    height: auto;
    transition: border-color .15s, box-shadow .15s;
}
.artigrid-filter-field .form-control:focus,
.artigrid-filter-field .form-select:focus {
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99,102,241,.12);
    outline: none;
}

/* Range filter (date range, number range) */
.artigrid-filter-range {
    display: flex;
    align-items: center;
    gap: .4rem;
}
.artigrid-filter-range .form-control { flex: 1; min-width: 0; }
.artigrid-filter-range-sep {
    color: #9ca3af;
    font-size: .75rem;
    white-space: nowrap;
    flex-shrink: 0;
}

/* Checkbox / Radio groups */
.artigrid-filter-checks {
    display: flex;
    flex-wrap: wrap;
    gap: .3rem .8rem;
    padding-top: .1rem;
}
.artigrid-filter-checks .form-check {
    margin: 0;
    padding-left: 1.5em;
}
.artigrid-filter-checks .form-check-label {
    font-size: .83rem;
    color: #374151;
    cursor: pointer;
}
.artigrid-filter-checks .form-check-input:checked {
    background-color: #6366f1;
    border-color: #6366f1;
}

/* Footer buttons */
.artigrid-filter-footer {
    display: flex;
    align-items: center;
    gap: .5rem;
    padding-top: .6rem;
    border-top: 1px solid #f1f5f9;
    flex-wrap: wrap;
}
.artigrid-filter-footer .btn {
    font-size: .82rem;
    padding: .32rem .85rem;
    border-radius: 6px;
}
.btn-artigrid-apply {
    background: #6366f1;
    border-color: #6366f1;
    color: #fff;
}
.btn-artigrid-apply:hover { background: #4f46e5; border-color: #4f46e5; color:#fff; }
.btn-artigrid-clear {
    background: #f1f5f9;
    border-color: #e2e8f0;
    color: #6b7280;
}
.btn-artigrid-clear:hover { background: #e2e8f0; color: #374151; }
.artigrid-filter-status {
    margin-left: auto;
    font-size: .78rem;
    color: #9ca3af;
    white-space: nowrap;
}
.artigrid-filter-status.has-active { color: #6366f1; font-weight: 600; }

/* Active filter chips (summary row) */
.artigrid-filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem;
    padding: .5rem 1.2rem .65rem;
    border-top: 1px dashed #e2e8f0;
}
.artigrid-filter-chips:empty { display: none; }
.artigrid-filter-chip {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    background: #eef2ff;
    color: #4338ca;
    border: 1px solid #c7d2fe;
    border-radius: 20px;
    font-size: .74rem;
    font-weight: 600;
    padding: .18rem .6rem;
}
.artigrid-filter-chip button {
    all: unset;
    cursor: pointer;
    color: #818cf8;
    font-size: .85rem;
    line-height: 1;
    display: flex;
    align-items: center;
}
.artigrid-filter-chip button:hover { color: #4338ca; }

/* Nested filter group */
.artigrid-filter-group {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: .7rem .9rem .5rem;
    grid-column: 1 / -1;
}
.artigrid-filter-group-title {
    font-size: .72rem;
    font-weight: 700;
    color: #6366f1;
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: .5rem;
    display: flex;
    align-items: center;
    gap: .3rem;
}

/* Responsive */
@media (max-width: 576px) {
    .artigrid-filter-rows { grid-template-columns: 1fr; }
    .artigrid-filter-range { flex-direction: column; }
    .artigrid-filter-range-sep { display: none; }
}