.advanced-filters-container {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    overflow: visible;
    transition: all 0.3s ease-in-out;
    box-shadow: 0 2px 8px var(--shadow);
    min-height: auto;
    height: auto;
    will-change: height;
    display: flex;
    flex-direction: column;
}

.filters-section {
    box-shadow: 0 2px 8px var(--shadow);
    position: relative;
    z-index: 999;
}

.filters-section + .main-content {
    margin-top: 0;
    padding-top: var(--spacing-md);
}

.filters-section .container {
    transition: padding var(--transition-normal);
}

.filters-section.sticky {
    position: sticky;
    top: 64px;
}

.filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: var(--background);
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-header:hover {
    background: var(--surface);
}

.filter-header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.filter-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.filter-count {
    background: var(--primary-color);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-xl);
    min-width: 20px;
    text-align: center;
}

.filter-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
}

.filter-toggle:hover {
    color: var(--primary-color);
    background: var(--surface);
}

.filter-toggle.expanded {
    transform: rotate(180deg);
}

.filter-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
    opacity: 0;
    scroll-behavior: smooth;
    will-change: max-height, opacity;
}

.filter-content.expanded {
    max-height: none !important;
    transition: max-height 0.3s ease-in, opacity 0.3s ease-in;
    opacity: 1;
    overflow: visible;
    position: relative;
    flex: 1;
}

.filter-content-inner {
    padding: var(--spacing-lg);
    min-height: auto;
    overflow: visible;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.basic-filters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--background);
    border-radius: var(--radius-lg);
}

@media (min-width: 768px) {
    .basic-filters {
        grid-template-columns: repeat(4, 1fr);
    }
}

.search-input {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    transition: all var(--transition-fast);
    width: 100%;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

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

.advanced-toggle-container {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.advanced-toggle-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    width: auto;
    margin: 0 auto;
}

.advanced-toggle-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.advanced-toggle-btn:active {
    transform: translateY(0);
}

.advanced-toggle-btn .toggle-icon {
    transition: transform var(--transition-fast);
}

.advanced-toggle-btn.expanded .toggle-icon {
    transform: rotate(180deg);
}

/* Ensure button is clickable */
.advanced-toggle-btn {
    pointer-events: all;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.advanced-toggle-btn .filter-count {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: 2px 6px;
    border-radius: var(--radius-xl);
    min-width: 18px;
    text-align: center;
}

/* Advanced Filters Groups */
.advanced-filters-groups {
    display: grid;
    gap: var(--spacing-xl);
    min-height: auto;
    overflow: visible; /* Allow groups to expand naturally */
    /* Ensure groups can grow */
    flex: 1;
}

.filter-group {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: visible; /* Allow group content to expand */
}

.filter-group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-group-header:hover {
    background: var(--primary-color);
    color: white;
}

.filter-group-header:active {
    transform: translateY(1px);
}

.filter-group-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.filter-group-icon {
    font-size: var(--font-size-sm);
}

.filter-group-toggle {
    background: none;
    border: none;
    color: inherit;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.filter-group-toggle.expanded {
    transform: rotate(180deg);
}

.filter-group-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
    background: var(--background);
    opacity: 0;
    will-change: max-height, opacity; /* Optimize for changes */
}

.filter-group-content.expanded {
    max-height: none !important; /* Override any inline styles */
    transition: max-height 0.3s ease-in, opacity 0.3s ease-in;
    opacity: 1;
    overflow: visible; /* Allow content to expand naturally */
}

/* Ensure the toggle icon rotates */
.filter-group-toggle {
    transition: transform 0.3s ease;
}

.filter-group-toggle.expanded {
    transform: rotate(180deg);
}

.filter-group-fields {
    padding: var(--spacing-lg);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .filter-group-fields {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Form Fields */
.form-field {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* Disabled select styling */
.filter-select:disabled {
    background-color: var(--background-secondary);
    color: var(--text-muted);
    cursor: not-allowed;
    opacity: 0.6;
}

.form-field label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-field input,
.form-field select,
.filter-select {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-field input:focus,
.form-field select:focus,
.filter-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-field select,
.filter-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

/* Range Fields */
.range-field {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-sm);
    align-items: center;
}

.range-separator {
    color: var(--text-muted);
    font-weight: 500;
}

/* Date Range */
.date-range {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-sm);
    align-items: center;
}

/* Search Input with Suggestions */
.search-with-suggestions {
    position: relative;
}

.suggestions-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--background);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    max-height: 200px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 0 4px 12px var(--shadow);
    display: none;
}

.suggestions-dropdown.show {
    display: block;
}

.suggestion-item {
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    border-bottom: 1px solid var(--border);
}

.suggestion-item:last-child {
    border-bottom: none;
}

.suggestion-item:hover,
.suggestion-item.highlighted {
    background: var(--surface);
}

/* Filter Actions */
.filter-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: var(--surface);
    border-top: 1px solid var(--border);
    gap: var(--spacing-md);
}

.filter-actions-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.filter-actions-right {
    display: flex;
    gap: var(--spacing-sm);
}

.clear-filters-btn {
    background: var(--background);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.clear-filters-btn:hover {
    background: var(--danger-color, #dc3545);
    color: white;
    border-color: var(--danger-color, #dc3545);
}

.apply-filters-btn {
    background: var(--primary-color);
    border: 1px solid var(--primary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.apply-filters-btn:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
}

/* Loading State */
.filter-loading {
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.filter-loading.show {
    display: flex;
}

.loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Auto Apply Toggle */
.auto-apply-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.toggle-switch {
    position: relative;
    width: 40px;
    height: 20px;
    background: var(--border);
    border-radius: 10px;
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.toggle-switch:hover {
    opacity: 0.8;
    transform: scale(1.05);
}

.toggle-switch.active {
    background: var(--primary-color);
}

.toggle-slider {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: white;
    border-radius: 50%;
    transition: transform var(--transition-fast);
}

.toggle-switch.active .toggle-slider {
    transform: translateX(20px);
}

/* Responsive Design */
@media (max-width: 767px) {
    .basic-filters {
        grid-template-columns: 1fr;
    }
    
    .filter-group-fields {
        grid-template-columns: 1fr;
    }
    
    .filter-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-actions-left,
    .filter-actions-right {
        justify-content: center;
    }
    
    .range-field,
    .date-range {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }
    
    .range-separator {
        text-align: center;
    }
}

/* Animation for expanding/collapsing */
.filter-expand-enter {
    max-height: 0;
}

.filter-expand-enter-active {
    max-height: 2000px;
    transition: max-height var(--transition-normal) ease-in;
}

.filter-expand-exit {
    max-height: 2000px;
}

.filter-expand-exit-active {
    max-height: 0;
    transition: max-height var(--transition-normal) ease-out;
}