.filter-area {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
    margin-bottom: 35px;
    max-width: 100%;
}

.filter-input-group {
    width: 100%;
}

.filter-input-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 8px;
}

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

.search-input-wrapper input {
    width: 100%;
    padding: 12px 40px 12px 15px;
    border: 1px solid #a8a8a8;
    border-radius: 10px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s;
}

.search-input-wrapper input:hover,
.search-input-wrapper input:focus {
    border-color: var(--tertiary-color);
}

.search-input-wrapper i {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--quaternary-color);
    font-size: 18px;
}

.select2-container--default .select2-selection--multiple {
    border: 1px solid #a8a8a8 !important;
    border-radius: 10px !important;
    min-height: 45px !important;
    padding: 5px !important;
}

.select2-container--default.select2-container--focus .select2-selection--multiple {
    border-color: var(--tertiary-color) !important;
}

.select2-container--default .select2-selection--multiple .select2-selection__choice {
    background-color: var(--secondary-color) !important;
    border: none !important;
    border-radius: 6px !important;
    padding: 3px 8px !important;
    color: var(--primary-color) !important;
    font-size: 14px !important;
    padding-left: 20px !important;
}

.select2-container--default .select2-selection--multiple .select2-selection__choice__remove {
    color: var(--primary-color) !important;
    margin-right: 5px !important;
    top: 50%;
    transform: translateY(-50%);
}

.knowledge-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.knowledge-item {
    background: #fff;
    border-radius: 15px;
    box-shadow: var(--box-shadow-1);
    padding: 20px;
    text-decoration: none;
    transition: transform 0.3s, box-shadow 0.3s;
    display: block;
}

.knowledge-item:hover {
    transform: translateY(-3px);
    box-shadow: 0px 5px 25px 0px rgba(0, 0, 0, 0.15);
}

.knowledge-item-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 10px;
    display: block;
}

.knowledge-item-content {
    font-size: 15px;
    color: var(--quaternary-color);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 0;
}

.loading-spinner {
    text-align: center;
    padding: 40px;
    display: none;
}

.loading-spinner.active {
    display: block;
}

.spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--secondary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

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

.no-results {
    text-align: center;
    padding: 40px;
    font-size: 16px;
    color: var(--quaternary-color);
    display: none;
}

.no-results.active {
    display: block;
}

.pagination-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 30px;
}

.pagination-btn {
    background-color: var(--secondary-color);
    color: var(--primary-color);
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.3s;
}

.pagination-btn:hover:not(:disabled) {
    opacity: 0.8;
}

.pagination-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination-info {
    font-size: 14px;
    color: var(--quaternary-color);
    font-weight: 500;
}

@media screen and (min-width: 768px) {
    .filter-area {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media screen and (max-width: 768px) {
    .knowledge-item-title {
        font-size: 18px;
    }

    .knowledge-item-content {
        font-size: 14px;
    }

    .pagination-btn {
        padding: 8px 15px;
        font-size: 13px;
    }
}