/* ═══════════════════════════════════════════
   Parametric Filter — KV Electronics
   ═══════════════════════════════════════════ */

/* ── Layout ── */
.pf-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 32px;
    align-items: start;
}

/* ── Sidebar ── */
.pf-sidebar {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    position: sticky;
    top: 90px;
    max-height: calc(100vh - 110px);
    overflow-y: auto;
    box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.pf-sidebar::-webkit-scrollbar { width: 5px; }
.pf-sidebar::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }

.pf-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 18px 12px;
    border-bottom: 1px solid #e2e8f0;
    position: sticky;
    top: 0;
    background: #fff;
    z-index: 2;
    border-radius: 12px 12px 0 0;
}
.pf-sidebar-title {
    font-weight: 700;
    font-size: 15px;
    color: #1e293b;
    display: flex;
    align-items: center;
}
.pf-clear-all {
    background: none;
    border: none;
    color: var(--theme-primary, #0056d6);
    font-size: 13px;
    cursor: pointer;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background .2s;
}
.pf-clear-all:hover { background: #f1f5f9; }

/* ── Search box ── */
.pf-search-box {
    padding: 12px 18px 8px;
}
.pf-search-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 13px;
    outline: none;
    transition: border-color .2s, box-shadow .2s;
    background: #f8fafc;
}
.pf-search-input:focus {
    border-color: var(--theme-primary, #0056d6);
    box-shadow: 0 0 0 3px rgba(0,86,214,.12);
    background: #fff;
}

/* ── Filter Groups ── */
.pf-group {
    border-bottom: 1px solid #f1f5f9;
}
.pf-group:last-child { border-bottom: none; }

.pf-group-toggle {
    display: flex;
    align-items: center;
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 12px 18px;
    font-size: 13px;
    font-weight: 600;
    color: #334155;
    cursor: pointer;
    gap: 6px;
    transition: background .15s;
}
.pf-group-toggle:hover { background: #f8fafc; }
.pf-group-toggle .pf-chevron {
    margin-left: auto;
    transition: transform .2s;
    color: #94a3b8;
    flex-shrink: 0;
}
.pf-group-toggle[aria-expanded="false"] .pf-chevron {
    transform: rotate(-90deg);
}

.pf-badge {
    background: var(--theme-primary, #0056d6);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 1px 7px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
    line-height: 16px;
}

.pf-group-body {
    padding: 0 18px 10px;
    max-height: 240px;
    overflow-y: auto;
    transition: max-height .3s ease, opacity .2s;
}
.pf-group-body.pf-collapsed {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    overflow: hidden;
    opacity: 0;
}
.pf-group-body::-webkit-scrollbar { width: 4px; }
.pf-group-body::-webkit-scrollbar-thumb { background: #e2e8f0; border-radius: 3px; }

/* ── Checkboxes ── */
.pf-checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 0;
    cursor: pointer;
    font-size: 13px;
    color: #475569;
    transition: color .15s;
    user-select: none;
}
.pf-checkbox-label:hover { color: #1e293b; }
.pf-checkbox {
    width: 16px;
    height: 16px;
    accent-color: var(--theme-primary, #0056d6);
    cursor: pointer;
    flex-shrink: 0;
    margin: 0;
}
.pf-checkbox-text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.pf-value-count {
    font-size: 11px;
    color: #94a3b8;
    flex-shrink: 0;
}

/* ── Toolbar ── */
.pf-toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.pf-mobile-filter-btn {
    display: none; /* shown on mobile */
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    background: #fff;
    font-size: 14px;
    font-weight: 600;
    color: #334155;
    cursor: pointer;
    transition: background .15s;
}
.pf-mobile-filter-btn:hover { background: #f8fafc; }
.pf-result-count {
    font-size: 14px;
    color: #64748b;
    flex: 1;
}
.pf-sort-select {
    padding: 7px 12px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 13px;
    color: #334155;
    background: #fff;
    outline: none;
    cursor: pointer;
}
.pf-sort-select:focus { border-color: var(--theme-primary, #0056d6); }

/* ── Active filter tags ── */
.pf-active-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}
.pf-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    background: #eff6ff;
    color: var(--theme-primary, #0056d6);
    border: 1px solid #bfdbfe;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    transition: background .15s;
}
.pf-tag:hover { background: #dbeafe; }
.pf-tag-remove {
    background: none;
    border: none;
    color: var(--theme-primary, #0056d6);
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    opacity: .7;
    transition: opacity .15s;
}
.pf-tag-remove:hover { opacity: 1; }

/* ── Card specs list ── */
.pf-card-specs {
    list-style: none;
    padding: 0;
    margin: 0 0 14px;
    font-size: 13px;
    color: #64748b;
    line-height: 1.7;
}
.pf-card-specs strong {
    color: #475569;
    font-weight: 600;
}
.pf-more-specs {
    color: var(--theme-primary, #0056d6);
    font-style: italic;
    font-size: 12px;
}

/* ── No results ── */
.pf-no-results {
    text-align: center;
    padding: 60px 20px;
    color: #64748b;
}
.pf-no-results svg { margin-bottom: 16px; }
.pf-no-results h4 { color: #334155; font-weight: 600; margin-bottom: 8px; }
.pf-no-results p { margin-bottom: 20px; }
.pf-reset-btn {
    background: var(--theme-primary, #0056d6);
    color: #fff;
    border: none;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity .2s;
}
.pf-reset-btn:hover { opacity: .9; }

/* ── Card hide/show animation ── */
.pf-product-card {
    transition: opacity .25s, transform .25s;
}
.pf-product-card.pf-hidden {
    display: none !important;
}

/* ── Mobile overlay ── */
.pf-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.4);
    z-index: 999;
}
.pf-overlay.active { display: block; }

/* ═══ Responsive ═══ */
@media (max-width: 992px) {
    .pf-layout {
        grid-template-columns: 1fr;
    }
    .pf-sidebar {
        position: fixed;
        left: -320px;
        top: 0;
        bottom: 0;
        width: 300px;
        max-height: 100vh;
        z-index: 1000;
        border-radius: 0 12px 12px 0;
        transition: left .3s ease;
    }
    .pf-sidebar.pf-open {
        left: 0;
    }
    .pf-mobile-filter-btn {
        display: inline-flex;
    }
}

@media (max-width: 576px) {
    .pf-toolbar { gap: 8px; }
    .pf-sort-select { width: 100%; }
}