/* ══════════════════════════════════════════
   GBoost Filters — Frontend CSS
   Uses CSS custom properties set inline
══════════════════════════════════════════ */

/* Base variables */
.gbf-filter-group {
    --gbf-primary:    #6366f1;
    --gbf-bg:         #ffffff;
    --gbf-border:     #e2e8f0;
    --gbf-text:       #374151;
    --gbf-text-muted: #94a3b8;
    --gbf-font-size:  14px;
    --gbf-radius:     6px;
    --gbf-spacing:    12px;
    --gbf-transition: .18s ease;
    font-size: var(--gbf-font-size);
    color: var(--gbf-text);
    font-family: inherit;
}

/* ── Filter sections ── */
.gbf-filter-section {
    background: var(--gbf-bg);
    border: 1px solid var(--gbf-border);
    border-radius: var(--gbf-radius);
    overflow: hidden;
    margin-bottom: var(--gbf-spacing);
}

.gbf-filter-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: calc(var(--gbf-spacing) * 0.8) var(--gbf-spacing);
    background: var(--gbf-bg);
    border-bottom: 1px solid var(--gbf-border);
    gap: 8px;
}

.gbf-collapsible .gbf-filter-header {
    cursor: pointer;
    user-select: none;
}

.gbf-collapsible .gbf-filter-header:hover {
    background: #f8fafc;
}

.gbf-filter-label {
    font-weight: 700;
    font-size: calc(var(--gbf-font-size) + 0px);
    flex: 1;
}

.gbf-chevron {
    color: var(--gbf-text-muted);
    transition: transform var(--gbf-transition);
    flex-shrink: 0;
}

.gbf-filter-header.gbf-open .gbf-chevron {
    transform: rotate(180deg);
}

.gbf-filter-body {
    padding: var(--gbf-spacing);
}

.gbf-filter-body.gbf-hidden {
    display: none;
}

/* ── Checkbox list ── */
.gbf-checkbox-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.gbf-option label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 3px 0;
    transition: color var(--gbf-transition);
}

.gbf-option label:hover { color: var(--gbf-primary); }

.gbf-option input[type="checkbox"],
.gbf-option input[type="radio"] {
    width: 16px;
    height: 16px;
    accent-color: var(--gbf-primary);
    cursor: pointer;
    flex-shrink: 0;
}

.gbf-option-name { flex: 1; }

.gbf-count {
    color: var(--gbf-text-muted);
    font-size: 0.85em;
}

.gbf-children {
    list-style: none;
    margin: 4px 0 0 20px;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* ── Button/Tag list ── */
.gbf-button-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.gbf-btn-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 12px;
    border: 1.5px solid var(--gbf-border);
    border-radius: var(--gbf-radius);
    background: var(--gbf-bg);
    color: var(--gbf-text);
    font-size: var(--gbf-font-size);
    cursor: pointer;
    transition: all var(--gbf-transition);
    white-space: nowrap;
}

.gbf-btn-tag:hover {
    border-color: var(--gbf-primary);
    color: var(--gbf-primary);
}

.gbf-btn-tag.active {
    background: var(--gbf-primary);
    border-color: var(--gbf-primary);
    color: #fff;
    font-weight: 600;
}

/* ── Dropdown ── */
.gbf-dropdown-wrap select {
    width: 100%;
    padding: 8px 10px;
    border: 1.5px solid var(--gbf-border);
    border-radius: var(--gbf-radius);
    background: var(--gbf-bg);
    color: var(--gbf-text);
    font-size: var(--gbf-font-size);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 36px;
}

.gbf-dropdown-wrap select:focus {
    border-color: var(--gbf-primary);
    outline: none;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--gbf-primary) 15%, transparent);
}

/* ── Price range ── */
.gbf-price-range {}

.gbf-price-display {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    font-size: var(--gbf-font-size);
    color: var(--gbf-text);
}

.gbf-range-track {
    position: relative;
    height: 6px;
    background: var(--gbf-border);
    border-radius: 3px;
    margin: 20px 0;
}

.gbf-range-fill {
    position: absolute;
    top: 0;
    height: 100%;
    background: var(--gbf-primary);
    border-radius: 3px;
    pointer-events: none;
}

.gbf-range {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    height: 0;
    background: transparent;
    appearance: none;
    pointer-events: none;
}

.gbf-range::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--gbf-primary);
    border: 2px solid #fff;
    box-shadow: 0 1px 4px rgba(0,0,0,.2);
    cursor: pointer;
    pointer-events: all;
}

.gbf-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--gbf-primary);
    border: 2px solid #fff;
    box-shadow: 0 1px 4px rgba(0,0,0,.2);
    cursor: pointer;
    pointer-events: all;
}

/* ── Toggle ── */
.gbf-toggle-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.gbf-toggle-input { display: none; }

.gbf-toggle-track {
    width: 44px;
    height: 24px;
    background: var(--gbf-border);
    border-radius: 12px;
    position: relative;
    transition: background var(--gbf-transition);
    flex-shrink: 0;
}

.gbf-toggle-thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 18px;
    height: 18px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0,0,0,.2);
    transition: transform var(--gbf-transition);
}

.gbf-toggle-input:checked + .gbf-toggle-track {
    background: var(--gbf-primary);
}

.gbf-toggle-input:checked + .gbf-toggle-track .gbf-toggle-thumb {
    transform: translateX(20px);
}

/* ── Rating ── */
.gbf-rating-filter {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.gbf-rating-option {
    display: flex;
    align-items: center;
    gap: 4px;
    background: none;
    border: 1.5px solid transparent;
    border-radius: var(--gbf-radius);
    padding: 5px 8px;
    cursor: pointer;
    color: #f59e0b;
    transition: all var(--gbf-transition);
    width: 100%;
    text-align: left;
}

.gbf-rating-option:hover,
.gbf-rating-option.active {
    background: #fffbeb;
    border-color: #f59e0b;
}

.gbf-rating-option span {
    color: var(--gbf-text-muted);
    font-size: 0.85em;
    margin-left: 4px;
}

/* ── Color swatches ── */
.gbf-color-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.gbf-color-swatch {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    position: relative;
    outline: none;
    transition: transform var(--gbf-transition), box-shadow var(--gbf-transition);
}

.gbf-color-swatch:hover {
    transform: scale(1.15);
    box-shadow: 0 2px 6px rgba(0,0,0,.2);
}

.gbf-color-swatch.active {
    border-color: var(--gbf-primary);
    box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--gbf-primary);
}

.gbf-color-swatch .gbf-check {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: #fff;
    text-shadow: 0 1px 2px rgba(0,0,0,.5);
    font-weight: 700;
}

/* ── Active chips ── */
.gbf-active-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--gbf-border);
}

.gbf-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    background: color-mix(in srgb, var(--gbf-primary) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--gbf-primary) 30%, transparent);
    border-radius: 20px;
    font-size: 12px;
    color: var(--gbf-primary);
    font-weight: 600;
}

.gbf-chip-remove {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    color: inherit;
    padding: 0;
    opacity: .7;
}

.gbf-chip-remove:hover { opacity: 1; }

.gbf-reset-all-btn {
    background: none;
    border: 1px solid var(--gbf-border);
    border-radius: 20px;
    padding: 4px 12px;
    font-size: 12px;
    color: var(--gbf-text-muted);
    cursor: pointer;
    transition: all var(--gbf-transition);
}

.gbf-reset-all-btn:hover {
    border-color: #dc2626;
    color: #dc2626;
}

/* ── Actions ── */
.gbf-filter-actions {
    display: flex;
    gap: 8px;
    padding-top: var(--gbf-spacing);
    border-top: 1px solid var(--gbf-border);
    margin-top: var(--gbf-spacing);
}

.gbf-btn-primary {
    flex: 1;
    padding: 10px 16px;
    background: var(--gbf-primary);
    color: #fff;
    border: none;
    border-radius: var(--gbf-radius);
    font-size: var(--gbf-font-size);
    font-weight: 600;
    cursor: pointer;
    transition: opacity var(--gbf-transition);
}

.gbf-btn-primary:hover { opacity: .85; }

.gbf-btn-outline {
    padding: 10px 16px;
    background: none;
    color: var(--gbf-text);
    border: 1.5px solid var(--gbf-border);
    border-radius: var(--gbf-radius);
    font-size: var(--gbf-font-size);
    cursor: pointer;
    transition: all var(--gbf-transition);
}

.gbf-btn-outline:hover { border-color: var(--gbf-primary); color: var(--gbf-primary); }

/* ── Clear filter ── */
.gbf-clear-filter {
    display: inline-block;
    margin-top: 6px;
    background: none;
    border: none;
    color: var(--gbf-text-muted);
    font-size: 11px;
    cursor: pointer;
    padding: 0;
    text-decoration: underline;
}

/* ── Show more ── */
.gbf-show-more {
    display: inline-block;
    margin-top: 6px;
    background: none;
    border: none;
    color: var(--gbf-primary);
    font-size: 12px;
    cursor: pointer;
    padding: 0;
    font-weight: 600;
}

.gbf-extra-option { display: none; }

/* ── Layout: Horizontal ── */
.gbf-layout-horizontal .gbf-filters-inner {
    display: flex;
    flex-wrap: wrap;
    gap: var(--gbf-spacing);
    align-items: flex-start;
}

.gbf-layout-horizontal .gbf-filter-section {
    flex: 1;
    min-width: 160px;
    margin-bottom: 0;
}

/* ── Layout: Offcanvas ── */
.gbf-offcanvas-trigger {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--gbf-primary);
    color: #fff;
    border: none;
    border-radius: var(--gbf-radius);
    font-size: var(--gbf-font-size);
    font-weight: 600;
    cursor: pointer;
    position: relative;
}

.gbf-active-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    background: #fff;
    color: var(--gbf-primary);
    border-radius: 50%;
    font-size: 11px;
    font-weight: 700;
}

.gbf-offcanvas-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 99998;
}

.gbf-offcanvas-overlay.show { display: block; }

.gbf-offcanvas-panel {
    position: fixed;
    top: 0;
    left: -360px;
    width: 340px;
    height: 100vh;
    background: var(--gbf-bg);
    z-index: 99999;
    display: flex;
    flex-direction: column;
    transition: left .3s ease;
    box-shadow: 4px 0 20px rgba(0,0,0,.15);
}

.gbf-offcanvas-panel.open { left: 0; }

.gbf-offcanvas-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--gbf-border);
    font-size: 16px;
    font-weight: 700;
}

.gbf-offcanvas-close {
    background: none;
    border: none;
    font-size: 22px;
    cursor: pointer;
    color: var(--gbf-text-muted);
    line-height: 1;
}

.gbf-offcanvas-panel .gbf-filters-inner {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.gbf-offcanvas-foot {
    padding: 16px;
    border-top: 1px solid var(--gbf-border);
    display: flex;
    gap: 8px;
}

.gbf-offcanvas-foot .gbf-btn-primary { flex: 1; }

/* ── Sticky ── */
.gbf-sticky {
    position: sticky;
    top: 20px;
}

/* ══════════════════════════════════════════
   LOADERS
══════════════════════════════════════════ */

/* Overlay loader */
.gbf-overlay-loader {
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,.75);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    border-radius: var(--gbf-radius, 6px);
}

.gbf-spinner-ring {
    width: 36px;
    height: 36px;
    border: 3px solid #e2e8f0;
    border-top-color: var(--gbf-primary, #6366f1);
    border-radius: 50%;
    animation: gbf-spin .7s linear infinite;
}

#gbf-spinner {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 99999;
    background: rgba(255,255,255,.9);
    padding: 20px;
    border-radius: 50%;
    box-shadow: 0 4px 20px rgba(0,0,0,.15);
}

/* Skeleton */
.gbf-skeleton-list { padding: 0; margin: 0; }

.gbf-skeleton-product {
    list-style: none;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
}

.gbf-skel-img {
    width: 100%;
    padding-top: 100%;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: gbf-shimmer 1.5s infinite;
}

.gbf-skel-line {
    height: 14px;
    margin: 10px 12px 6px;
    border-radius: 4px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: gbf-shimmer 1.5s infinite;
}

.gbf-skel-short { width: 60%; margin-left: 12px; }

.gbf-loading { position: relative; }

@keyframes gbf-spin    { to { transform: rotate(360deg); } }
@keyframes gbf-shimmer { to { background-position: -200% 0; } }

/* ══════════════════════════════════════════
   PRESETS
══════════════════════════════════════════ */

/* Preset: Rounded */
.gbf-preset-rounded .gbf-filter-section  { border-radius: 12px; }
.gbf-preset-rounded .gbf-btn-tag         { border-radius: 20px; }
.gbf-preset-rounded .gbf-btn-primary,
.gbf-preset-rounded .gbf-btn-outline     { border-radius: 20px; }
.gbf-preset-rounded .gbf-chip           { border-radius: 20px; }

/* Preset: Boxed */
.gbf-preset-boxed .gbf-filter-section {
    border-radius: 0;
    border-left: 4px solid var(--gbf-primary);
}
.gbf-preset-boxed .gbf-btn-tag         { border-radius: 0; }
.gbf-preset-boxed .gbf-filter-header   { background: #f8fafc; }

/* Preset: Pill */
.gbf-preset-pill .gbf-filter-section { border: none; background: transparent; }
.gbf-preset-pill .gbf-filter-header  { background: var(--gbf-primary); color: #fff; border-radius: 20px; }
.gbf-preset-pill .gbf-filter-label   { color: #fff; }
.gbf-preset-pill .gbf-chevron        { stroke: #fff; }
.gbf-preset-pill .gbf-filter-body    { padding-top: 10px; }
.gbf-preset-pill .gbf-btn-tag        { border-radius: 20px; }

/* Preset: Dark */
.gbf-preset-dark {
    --gbf-bg:         #1e293b;
    --gbf-border:     #334155;
    --gbf-text:       #e2e8f0;
    --gbf-text-muted: #64748b;
}
.gbf-preset-dark .gbf-filter-header     { background: #0f172a; }
.gbf-preset-dark .gbf-option label:hover { color: var(--gbf-primary); }
.gbf-preset-dark .gbf-btn-tag           { background: #0f172a; }
.gbf-preset-dark .gbf-btn-tag:hover     { background: #334155; }
.gbf-preset-dark .gbf-dropdown-wrap select { background-color: #0f172a; color: #e2e8f0; }

/* Preset: Card */
.gbf-preset-card .gbf-filter-section {
    box-shadow: 0 2px 8px rgba(0,0,0,.06);
    border: none;
}
.gbf-preset-card .gbf-filter-header {
    border-bottom: 2px solid var(--gbf-primary);
    background: linear-gradient(135deg, #f8fafc 0%, #fff 100%);
}

/* ══════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════ */

@media (max-width: 768px) {
    .gbf-layout-horizontal .gbf-filters-inner { flex-direction: column; }
    .gbf-offcanvas-panel { width: 100%; left: -100%; }
}

/* Accessibility */
.gbf-filter-group *:focus-visible {
    outline: 2px solid var(--gbf-primary);
    outline-offset: 2px;
}

/* ══════════════════════════════════════════
   v2 additions — new CSS vars + loaders
══════════════════════════════════════════ */

.gbf-filter-group {
    --gbf-primary-text: #ffffff;
    --gbf-section-bg:   #f8fafc;
    --gbf-active-bg:    #eff6ff;
    --gbf-chip-bg:      #eff6ff;
    --gbf-chip-text:    #6366f1;
    --gbf-radius-btn:   6px;
    --gbf-border-w:     1px;
    --gbf-section-gap:  10px;
    --gbf-option-gap:   6px;
}

.gbf-filter-section {
    border-width: var(--gbf-border-w);
    margin-bottom: var(--gbf-section-gap);
}

.gbf-checkbox-list { gap: var(--gbf-option-gap); }
.gbf-button-list   { gap: var(--gbf-option-gap); }
.gbf-radio-list    { gap: var(--gbf-option-gap); }

.gbf-filter-header { background: var(--gbf-section-bg); }
.gbf-btn-tag       { border-radius: var(--gbf-radius-btn); }
.gbf-btn-primary   { border-radius: var(--gbf-radius-btn); }
.gbf-btn-outline   { border-radius: var(--gbf-radius-btn); }

.gbf-option label:hover { background: var(--gbf-active-bg); }
.gbf-option.gbf-checked label { background: var(--gbf-active-bg); border-radius: var(--gbf-radius); }

.gbf-chip {
    background: var(--gbf-chip-bg);
    color: var(--gbf-chip-text);
}

/* ── Ghost preset ── */
.gbf-preset-ghost .gbf-filter-section { border: none; background: transparent; }
.gbf-preset-ghost .gbf-filter-header  { background: transparent; border-bottom: 2px solid var(--gbf-border); }

/* ── Sharp preset ── */
.gbf-preset-sharp .gbf-filter-section  { border-radius: 0; }
.gbf-preset-sharp .gbf-btn-tag,
.gbf-preset-sharp .gbf-btn-primary,
.gbf-preset-sharp .gbf-btn-outline     { border-radius: 0; }

/* ── Inline layout ── */
.gbf-layout-inline .gbf-filters-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}
.gbf-layout-inline .gbf-filter-section {
    flex: 0 0 auto;
    margin-bottom: 0;
    border: none;
    background: none;
}
.gbf-layout-inline .gbf-filter-header { display: none; }

/* ── Search box inside filter ── */
.gbf-filter-search {
    padding: 6px var(--gbf-spacing);
    border-bottom: 1px solid var(--gbf-border);
}
.gbf-filter-search input {
    width: 100%;
    padding: 5px 8px;
    border: 1px solid var(--gbf-border);
    border-radius: calc(var(--gbf-radius) - 2px);
    font-size: calc(var(--gbf-font-size) - 1px);
    box-sizing: border-box;
}

/* ── Result count inside filter ── */
.gbf-result-count {
    padding: 6px var(--gbf-spacing);
    font-size: 12px;
    color: var(--gbf-text-muted);
    border-bottom: 1px solid var(--gbf-border);
}

/* ── Tooltip ── */
.gbf-tooltip-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--gbf-border);
    color: var(--gbf-text-muted);
    font-size: 9px;
    cursor: help;
    margin-left: 4px;
    position: relative;
}
.gbf-tooltip-icon:hover::after {
    content: attr(data-tip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #0f172a;
    color: #fff;
    font-size: 11px;
    padding: 4px 8px;
    border-radius: 4px;
    white-space: nowrap;
    pointer-events: none;
    margin-bottom: 4px;
    z-index: 100;
}

/* ── Loaders v2 ── */

/* Progress bar */
.gbf-bar-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--gbf-primary, #6366f1);
    z-index: 99999;
    transition: width .4s ease;
    border-radius: 0 2px 2px 0;
    box-shadow: 0 0 8px var(--gbf-primary, #6366f1);
}

/* Blur */
.gbf-loading.gbf-blur-loader {
    filter: blur(3px);
    pointer-events: none;
    transition: filter .3s;
}

/* Loader text */
.gbf-loader-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 13px;
    font-weight: 600;
    color: var(--gbf-primary, #6366f1);
    margin-top: 28px;
    white-space: nowrap;
}