/**
 * Zorotan Theme - Controls & Interactive Elements Styles
 * 
 * Styles for dynamic control elements including:
 * - Search Functionality
 * - Filter Controls
 * - Sort Options
 * - Pagination
 * - Load More Buttons
 * - Modal Windows
 * - Form Elements
 * 
 * @package Zorotan
 * @version 1.0.0
 */

/* ========================================
   1. SEARCH FUNCTIONALITY
   ======================================== */

.search-container {
    position: relative;
    max-width: 500px;
    margin: 0 auto calc(var(--spacing-unit) * 6) auto;
}

.search-form {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: 25px;
    transition: all 0.3s ease;
    overflow: hidden;
}

.search-form:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.1);
}

.search-input {
    flex: 1;
    padding: calc(var(--spacing-unit) * 2.5) calc(var(--spacing-unit) * 3);
    border: none;
    background: transparent;
    font-size: 16px;
    color: var(--primary-color);
    outline: none;
    min-width: 0;
}

.search-input::placeholder {
    color: var(--text-light);
    font-style: italic;
}

.search-btn {
    padding: calc(var(--spacing-unit) * 2.5) calc(var(--spacing-unit) * 3);
    background: var(--primary-color);
    border: none;
    color: var(--white);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 50px;
}

.search-btn:hover {
    background: var(--text-gray);
}

.search-btn::before {
    content: '🔍';
    font-size: 16px;
}

.search-btn.loading::before {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Advanced Search */
.advanced-search {
    margin-top: calc(var(--spacing-unit) * 4);
    padding: calc(var(--spacing-unit) * 4);
    background: var(--bg-gray);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.advanced-search-toggle {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 14px;
    cursor: pointer;
    margin-top: calc(var(--spacing-unit) * 2);
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
}

.advanced-search-toggle:hover {
    color: var(--text-gray);
}

.advanced-search-toggle::after {
    content: '▼';
    font-size: 12px;
    transition: transform 0.3s ease;
}

.advanced-search-toggle.expanded::after {
    transform: rotate(180deg);
}

.advanced-search-fields {
    display: none;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
    margin-top: calc(var(--spacing-unit) * 4);
    padding-top: calc(var(--spacing-unit) * 4);
    border-top: 1px solid var(--border-color);
}

.advanced-search-fields.expanded {
    display: grid;
}

.search-field {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 1);
}

.search-field label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-gray);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.search-field input,
.search-field select {
    padding: calc(var(--spacing-unit) * 2);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    background: var(--white);
    transition: all 0.3s ease;
}

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

/* Search Suggestions */
.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 8px 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    max-height: 300px;
    overflow-y: auto;
    display: none;
}

.search-suggestions.visible {
    display: block;
}

.suggestion-item {
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
}

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

.suggestion-item:hover,
.suggestion-item.highlighted {
    background: var(--bg-gray);
    color: var(--primary-color);
}

.suggestion-icon {
    font-size: 14px;
    opacity: 0.7;
}

.suggestion-text {
    flex: 1;
    font-size: 14px;
}

.suggestion-category {
    font-size: 12px;
    color: var(--text-light);
    background: var(--bg-gray);
    padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit) * 1);
    border-radius: 4px;
}

/* Search Results */
.search-results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: calc(var(--spacing-unit) * 4);
    padding: calc(var(--spacing-unit) * 3);
    background: var(--bg-gray);
    border-radius: 6px;
}

.search-results-count {
    font-size: 14px;
    color: var(--text-gray);
}

.results-count-number {
    font-weight: 600;
    color: var(--primary-color);
}

.search-results-clear {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 12px;
    font-weight: 500;
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
    border: 1px solid var(--primary-color);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.search-results-clear:hover {
    background: var(--primary-color);
    color: var(--white);
}

/* ========================================
   2. FILTER CONTROLS
   ======================================== */

.filter-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: calc(var(--spacing-unit) * 6);
    padding: calc(var(--spacing-unit) * 4) 0;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: calc(var(--spacing-unit) * 3);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    flex-wrap: wrap;
}

.filter-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-gray);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-right: calc(var(--spacing-unit) * 1);
}

.filter-buttons {
    display: flex;
    gap: calc(var(--spacing-unit) * 1);
    flex-wrap: wrap;
}

.filter-btn {
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
    font-size: 13px;
    letter-spacing: 0.05em;
    background: var(--white);
    border: 1px solid var(--border-color);
    color: var(--text-gray);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 20px;
    text-transform: capitalize;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.filter-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    transition: left 0.3s ease;
    z-index: -1;
}

.filter-btn:hover::before,
.filter-btn.active::before {
    left: 0;
}

.filter-btn:hover,
.filter-btn.active {
    color: var(--white);
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.filter-btn .count {
    display: inline-block;
    margin-left: calc(var(--spacing-unit) * 1);
    padding: 2px 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    font-size: 10px;
    font-weight: 600;
}

.filter-btn:hover .count,
.filter-btn.active .count {
    background: rgba(255, 255, 255, 0.3);
}

/* Filter Dropdown */
.filter-dropdown {
    position: relative;
}

.filter-dropdown-btn {
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
    background: var(--white);
    border: 1px solid var(--border-color);
    color: var(--text-gray);
    cursor: pointer;
    border-radius: 6px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    transition: all 0.3s ease;
    min-width: 120px;
}

.filter-dropdown-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.filter-dropdown-btn::after {
    content: '▼';
    font-size: 10px;
    transition: transform 0.3s ease;
    margin-left: auto;
}

.filter-dropdown-btn.open::after {
    transform: rotate(180deg);
}

.filter-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    max-height: 200px;
    overflow-y: auto;
    display: none;
    margin-top: 4px;
}

.filter-dropdown-menu.open {
    display: block;
}

.filter-dropdown-item {
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 13px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.filter-dropdown-item:hover,
.filter-dropdown-item.selected {
    background: var(--bg-gray);
    color: var(--primary-color);
}

.filter-dropdown-item.selected::after {
    content: '✓';
    font-size: 12px;
    color: var(--primary-color);
}

/* Active Filters */
.active-filters {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    margin-bottom: calc(var(--spacing-unit) * 4);
    flex-wrap: wrap;
}

.active-filters-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-gray);
    letter-spacing: 0.05em;
}

.active-filter-tag {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
    background: var(--primary-color);
    color: var(--white);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.active-filter-remove {
    background: none;
    border: none;
    color: var(--white);
    cursor: pointer;
    font-size: 14px;
    padding: 0;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.active-filter-remove:hover {
    background: rgba(255, 255, 255, 0.2);
}

.active-filter-remove::before {
    content: '×';
    line-height: 1;
}

.clear-all-filters {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 12px;
    font-weight: 500;
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
    border: 1px solid var(--primary-color);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.clear-all-filters:hover {
    background: var(--primary-color);
    color: var(--white);
}

/* ========================================
   3. SORT OPTIONS
   ======================================== */

.sort-controls {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
}

.sort-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-gray);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.sort-select {
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
    border: 1px solid var(--border-color);
    background: var(--white);
    color: var(--text-gray);
    border-radius: 4px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 140px;
}

.sort-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.1);
}

.sort-select:hover {
    border-color: var(--primary-color);
}

.sort-buttons {
    display: flex;
    gap: calc(var(--spacing-unit) * 1);
}

.sort-btn {
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
    background: var(--white);
    border: 1px solid var(--border-color);
    color: var(--text-gray);
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 4px;
    font-size: 12px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
}

.sort-btn:hover,
.sort-btn.active {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.sort-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    transition: all 0.3s ease;
}

.sort-btn.asc::after {
    border-bottom: 6px solid currentColor;
}

.sort-btn.desc::after {
    border-top: 6px solid currentColor;
}

/* ========================================
   4. PAGINATION
   ======================================== */

.pagination-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: calc(var(--spacing-unit) * 8) 0;
    padding-top: calc(var(--spacing-unit) * 6);
    border-top: 1px solid var(--border-color);
}

.pagination {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
    list-style: none;
}

.page-item {
    display: flex;
}

.page-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    text-decoration: none;
    color: var(--text-gray);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.page-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    transition: left 0.3s ease;
    z-index: -1;
}

.page-link:hover::before,
.page-item.active .page-link::before {
    left: 0;
}

.page-link:hover,
.page-item.active .page-link {
    color: var(--white);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.page-item.disabled .page-link {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.page-item.dots .page-link {
    border: none;
    cursor: default;
    pointer-events: none;
}

.page-item.dots .page-link:hover {
    background: none;
    color: var(--text-gray);
    transform: none;
}

/* Pagination Info */
.pagination-info {
    margin-top: calc(var(--spacing-unit) * 3);
    text-align: center;
    font-size: 13px;
    color: var(--text-gray);
}

.pagination-current {
    font-weight: 600;
    color: var(--primary-color);
}

/* ========================================
   5. LOAD MORE FUNCTIONALITY
   ======================================== */

.load-more-container {
    text-align: center;
    margin: calc(var(--spacing-unit) * 8) 0;
    padding-top: calc(var(--spacing-unit) * 6);
    border-top: 1px solid var(--border-color);
}

.load-more-btn {
    background: var(--white);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 6);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 25px;
    position: relative;
    overflow: hidden;
    min-width: 180px;
}

.load-more-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    transition: left 0.3s ease;
    z-index: -1;
}

.load-more-btn:hover::before {
    left: 0;
}

.load-more-btn:hover {
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.load-more-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.load-more-btn.loading {
    pointer-events: none;
}

.load-more-btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin: -8px 0 0 -8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.load-more-text {
    transition: opacity 0.3s ease;
}

.load-more-btn.loading .load-more-text {
    opacity: 0;
}

/* Infinite Scroll Indicator */
.infinite-scroll-loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: calc(var(--spacing-unit) * 4);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.infinite-scroll-loading.visible {
    opacity: 1;
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ========================================
   6. MODAL WINDOWS
   ======================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--white);
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow: auto;
    position: relative;
    transform: scale(0.9) translateY(20px);
    transition: transform 0.3s ease;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: calc(var(--spacing-unit) * 4);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-gray);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: var(--bg-gray);
    color: var(--primary-color);
}

.modal-close::before {
    content: '×';
    line-height: 1;
}

.modal-body {
    padding: calc(var(--spacing-unit) * 4);
}

.modal-footer {
    padding: calc(var(--spacing-unit) * 4);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: calc(var(--spacing-unit) * 2);
}

/* ========================================
   7. FORM ELEMENTS
   ======================================== */

.form-group {
    margin-bottom: calc(var(--spacing-unit) * 4);
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-gray);
    margin-bottom: calc(var(--spacing-unit) * 1);
    letter-spacing: 0.05em;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: calc(var(--spacing-unit) * 2.5);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    background: var(--white);
    transition: all 0.3s ease;
    font-family: inherit;
}

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

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-checkbox,
.form-radio {
    position: relative;
}

.form-checkbox input,
.form-radio input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.form-checkbox label,
.form-radio label {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    cursor: pointer;
    font-size: 14px;
}

.form-checkbox .checkmark,
.form-radio .checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    background: var(--white);
    transition: all 0.3s ease;
    position: relative;
    flex-shrink: 0;
}

.form-checkbox .checkmark {
    border-radius: 4px;
}

.form-radio .checkmark {
    border-radius: 50%;
}

.form-checkbox input:checked + label .checkmark,
.form-radio input:checked + label .checkmark {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.form-checkbox input:checked + label .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--white);
    font-size: 12px;
    font-weight: bold;
}

.form-radio input:checked + label .checkmark::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background: var(--white);
    border-radius: 50%;
}

/* Form Validation */
.form-input.error,
.form-textarea.error,
.form-select.error {
    border-color: #e74c3c;
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.form-input.success,
.form-textarea.success,
.form-select.success {
    border-color: #2ecc71;
    box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.1);
}

.form-error {
    display: block;
    color: #e74c3c;
    font-size: 12px;
    margin-top: calc(var(--spacing-unit) * 1);
    font-weight: 500;
}

.form-success {
    display: block;
    color: #2ecc71;
    font-size: 12px;
    margin-top: calc(var(--spacing-unit) * 1);
    font-weight: 500;
}

.form-help {
    display: block;
    color: var(--text-light);
    font-size: 12px;
    margin-top: calc(var(--spacing-unit) * 1);
}

/* ========================================
   8. RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 1024px) {
    .filter-controls {
        flex-direction: column;
        align-items: stretch;
        gap: calc(var(--spacing-unit) * 4);
    }

    .filter-group {
        justify-content: center;
    }

    .sort-controls {
        justify-content: center;
    }

    .advanced-search-fields {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }
}

@media (max-width: 768px) {
    .search-container {
        max-width: 100%;
        margin-bottom: calc(var(--spacing-unit) * 4);
    }

    .search-form {
        border-radius: 8px;
    }

    .search-input {
        font-size: 14px;
        padding: calc(var(--spacing-unit) * 2);
    }

    .search-btn {
        padding: calc(var(--spacing-unit) * 2);
    }

    .filter-controls {
        padding: calc(var(--spacing-unit) * 3) 0;
    }

    .filter-buttons {
        justify-content: center;
    }

    .filter-btn {
        font-size: 12px;
        padding: calc(var(--spacing-unit) * 1.25) calc(var(--spacing-unit) * 2.5);
    }

    .active-filters {
        justify-content: center;
    }

    .pagination {
        gap: calc(var(--spacing-unit) * 0.5);
    }

    .page-link {
        width: 36px;
        height: 36px;
        font-size: 13px;
    }

    .load-more-btn {
        padding: calc(var(--spacing-unit) * 2.5) calc(var(--spacing-unit) * 4);
        font-size: 13px;
        min-width: 160px;
    }

    .modal-content {
        width: 95%;
        margin: calc(var(--spacing-unit) * 2);
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding: calc(var(--spacing-unit) * 3);
    }

    .advanced-search-fields {
        grid-template-columns: 1fr;
    }

    .sort-controls {
        flex-direction: column;
        align-items: center;
        gap: calc(var(--spacing-unit) * 2);
    }

    .sort-buttons {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .search-input {
        font-size: 13px;
        padding: calc(var(--spacing-unit) * 1.5);
    }

    .search-btn {
        padding: calc(var(--spacing-unit) * 1.5);
    }

    .filter-btn {
        font-size: 11px;
        padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
        border-radius: 16px;
    }

    .active-filter-tag {
        font-size: 11px;
        padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
    }

    .page-link {
        width: 32px;
        height: 32px;
        font-size: 12px;
    }

    .load-more-btn {
        padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
        font-size: 12px;
        min-width: 140px;
    }

    .modal-title {
        font-size: 18px;
    }

    .modal-close {
        width: 28px;
        height: 28px;
        font-size: 20px;
    }

    .form-input,
    .form-textarea,
    .form-select {
        padding: calc(var(--spacing-unit) * 2);
        font-size: 13px;
    }

    .filter-dropdown-btn,
    .sort-select {
        font-size: 12px;
        padding: calc(var(--spacing-unit) * 1.5);
        min-width: 100px;
    }
}

/* ========================================
   9. ACCESSIBILITY & PERFORMANCE
   ======================================== */

/* Focus States */
.search-input:focus,
.search-btn:focus,
.filter-btn:focus,
.filter-dropdown-btn:focus,
.sort-btn:focus,
.sort-select:focus,
.page-link:focus,
.load-more-btn:focus,
.modal-close:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.suggestion-item:focus,
.filter-dropdown-item:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Keyboard Navigation */
.suggestion-item.keyboard-focused,
.filter-dropdown-item.keyboard-focused {
    background: var(--bg-gray);
    color: var(--primary-color);
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .search-form,
    .filter-btn,
    .page-link,
    .load-more-btn {
        border-width: 2px;
    }
    
    .active-filter-tag {
        border: 2px solid var(--primary-color);
    }
    
    .modal-content {
        border: 3px solid var(--primary-color);
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    .search-form,
    .filter-btn,
    .page-link,
    .load-more-btn,
    .modal-overlay,
    .modal-content,
    .active-filter-tag {
        transition: none;
    }
    
    .filter-btn:hover,
    .page-link:hover,
    .load-more-btn:hover {
        transform: none;
    }
    
    .filter-btn::before,
    .page-link::before,
    .load-more-btn::before {
        transition: none;
    }
    
    .loading-spinner {
        animation: none;
    }
    
    .search-btn.loading::before,
    .load-more-btn.loading::after {
        animation: none;
    }
}

/* Performance Optimizations */
.filter-btn:hover,
.page-link:hover,
.load-more-btn:hover {
    will-change: transform, box-shadow;
}

/* Screen Reader Support */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.sr-only:focus {
    position: static;
    width: auto;
    height: auto;
    padding: inherit;
    margin: inherit;
    overflow: visible;
    clip: auto;
    white-space: normal;
}

/* Loading States */
.controls-loading {
    opacity: 0.6;
    pointer-events: none;
}

.skeleton-loading {
    background: linear-gradient(90deg, 
        var(--bg-gray) 25%, 
        #e0e0e0 50%, 
        var(--bg-gray) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* ========================================
   10. UTILITY CLASSES
   ======================================== */

/* State Classes */
.is-loading { pointer-events: none; opacity: 0.6; }
.is-disabled { pointer-events: none; opacity: 0.5; }
.is-hidden { display: none; }
.is-visible { display: block; }

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.animate {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-left.animate {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-right.animate {
    opacity: 1;
    transform: translateX(0);
}

/* Stagger animations for filter buttons */
.filter-btn:nth-child(1) { animation-delay: 0.1s; }
.filter-btn:nth-child(2) { animation-delay: 0.15s; }
.filter-btn:nth-child(3) { animation-delay: 0.2s; }
.filter-btn:nth-child(4) { animation-delay: 0.25s; }
.filter-btn:nth-child(5) { animation-delay: 0.3s; }

/* Filter transition effects */
.filter-transition {
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.filter-transition.filtering {
    opacity: 0.3;
    transform: scale(0.98);
}

.filter-transition.filtered-out {
    display: none;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: calc(70px + var(--spacing-unit) * 2);
    right: var(--spacing-unit) * 2;
    z-index: 9998;
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 1);
}

.toast {
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    font-size: 14px;
    max-width: 300px;
    animation: toastSlideIn 0.3s ease;
    position: relative;
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
}

.toast.success {
    border-left: 4px solid #2ecc71;
}

.toast.error {
    border-left: 4px solid #e74c3c;
}

.toast.info {
    border-left: 4px solid #3498db;
}

.toast.warning {
    border-left: 4px solid #f39c12;
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-gray);
    cursor: pointer;
    font-size: 16px;
    padding: 0;
    margin-left: auto;
}

.toast-close:hover {
    color: var(--primary-color);
}

.toast-close::before {
    content: '×';
}

/* Print Styles */
@media print {
    .filter-controls,
    .search-container,
    .pagination-container,
    .load-more-container,
    .modal-overlay,
    .toast-container {
        display: none;
    }
}

/* Dark Mode Support (if implemented) */
@media (prefers-color-scheme: dark) {
    .search-suggestions,
    .filter-dropdown-menu,
    .modal-content {
        background: var(--dark-bg, #2c2c2c);
        border-color: var(--dark-border, #444);
        color: var(--dark-text, #e0e0e0);
    }
}