/**
 * ===============================================================================
 * BALAM AI - Filter Bar Component
 * ===============================================================================
 *
 * Global filter/search toolbar — the single source of truth for the filter
 * sections previously copy-pasted into pages/chat-history.css, pages/tools.css
 * and pages/invocations.css. Token-driven; pairs with the dropdown/datepicker
 * partials. Page CSS (loaded after this) may still override for page nuances,
 * but new pages get a consistent filter bar for free.
 *
 * Structure:
 *   <div class="filter-section">
 *     <div class="filter-grid">
 *       <div class="filter-group"> ...dropdown/datepicker/search... </div>
 *     </div>
 *   </div>
 *
 * @requires shared-variables.css
 * @version 1.0.0
 * ===============================================================================
 */

/* ─── Section card ─────────────────────────────────────────────────────────── */

.filter-section {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--balam-radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--card-shadow);
}

/* ─── Responsive grid ──────────────────────────────────────────────────────── */

.filter-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 1.25rem;
    align-items: flex-end;
}

.filter-grid .filter-group {
    flex: 1 1 180px;
    min-width: 160px;
    max-width: 100%;
}

/* 4th group (date range) gets more room; last group (search) is capped. */
.filter-grid .filter-group:nth-child(4) {
    flex: 2 1 320px;
    min-width: 280px;
}

.filter-grid .filter-group:last-child {
    flex: 1 1 200px;
    min-width: 180px;
    max-width: 300px;
}

@media (min-width: 1400px) {
    .filter-grid .filter-group { flex: 1 1 150px; min-width: 140px; max-width: none; }
    .filter-grid .filter-group:nth-child(4) { flex: 1.5 1 300px; min-width: 280px; }
    .filter-grid .filter-group:last-child { flex: 1.2 1 180px; max-width: none; }
}

@media (max-width: 1199.98px) {
    .filter-grid { gap: 1rem; }
    .filter-grid .filter-group { flex: 1 1 200px; min-width: 180px; max-width: 280px; }
    .filter-grid .filter-group:nth-child(4) { flex: 1 1 100%; min-width: 100%; max-width: 100%; }
    .filter-grid .filter-group:last-child { max-width: 280px; }
}

@media (max-width: 991.98px) {
    .filter-grid .filter-group { flex: 1 1 calc(50% - 0.5rem); min-width: calc(50% - 0.5rem); }
    .filter-grid .filter-group:nth-child(4),
    .filter-grid .filter-group:last-child { flex: 1 1 100%; min-width: 100%; }
}

@media (max-width: 767.98px) {
    .filter-section { padding: 1rem; }
    .filter-grid { gap: 0.875rem; }
    .filter-grid .filter-group { flex: 1 1 100%; min-width: 100%; }
}

@media (max-width: 575.98px) {
    .filter-section { padding: 0.875rem; margin-bottom: 1rem; }
    .filter-grid { gap: 0.75rem; }
}

/* ─── Group + label ────────────────────────────────────────────────────────── */

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.filter-label {
    font-size: 0.8125rem;
    font-weight: var(--balam-font-semibold, 600);
    color: var(--text-gray);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.filter-label i {
    color: var(--primary);
    font-size: 0.875rem;
}

/* ─── Inputs / native selects ──────────────────────────────────────────────── */

.filter-input,
.filter-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--card-border);
    border-radius: var(--balam-radius-md);
    font-size: 0.875rem;
    color: var(--text-dark);
    background: var(--card-bg);
    transition: all 0.2s ease;
}

.filter-input:focus,
.filter-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.filter-input::placeholder {
    color: var(--text-light);
}

.filter-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b7280' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
    min-width: 0;
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
}

/* ─── Search box (icon + input) ────────────────────────────────────────────── */

.search-box {
    position: relative;
    width: 100%;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 1px solid var(--card-border);
    border-radius: var(--balam-radius-md);
    font-size: 0.875rem;
    color: var(--text-dark);
    background: var(--card-bg);
    transition: all 0.2s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.search-box input::placeholder {
    color: var(--text-light);
}

.search-box i {
    position: absolute;
    left: 0.875rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    pointer-events: none;
}