#specialty {
    padding: 8rem 2rem;
    background: linear-gradient(180deg, #f0f8ff 0%, #e6f2ff 50%, #d6e9ff 100%);
    min-height: 80rem;
    position: relative;
}

#specialty::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%230000ff' fill-opacity='0.02'%3E%3Cpath d='M40 40.5V40H0v0h40v0.5zm0-0.5h40v40H40V40h-0.5V0h0.5v40v-0.5zM40 40v-0.5H80V0h-0.5v40H40v0.5z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.package-header {
    text-align: center;
    max-width: 80rem;
    margin: 0 auto 5rem;
    position: relative;
    z-index: 2;
}

.package-header h1 {
    font-size: 4rem;
    color: #0000ff;
    margin-bottom: 2rem;
    font-weight: 800;
    text-transform: uppercase;
    background: linear-gradient(90deg, #0000ff, #00d2ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.package-header p {
    font-size: 1.8rem;
    color: #666;
    line-height: 1.6;
}

/* Menu Filter */
.package-list-menu {
    margin-bottom: 5rem;
    display: flex;
    justify-content: center;
}

.package-list-menu ul {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    list-style: none;
    padding: 1rem;
    background: #fff;
    border-radius: 5rem;
    box-shadow: 0 1rem 3rem rgba(0, 0, 255, 0.1);
    border: 1px solid rgba(0, 0, 255, 0.05);
}

.package-list-menu .filter-btn {
    background: transparent;
    text-decoration: none;
    padding: 1rem 2rem;
    border-radius: 3rem;
    font-size: 1.4rem;
    font-weight: 700;
    color: #666;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    align-items: center;
    gap: 0.8rem;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.package-list-menu .filter-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 0, 255, 0.1), transparent);
    transform: translateX(-100%);
    transition: transform 0.5s ease;
}

.package-list-menu .filter-btn:hover::before {
    transform: translateX(0);
}

/* Specific colors for each category with blue theme enhancement */
.package-list-menu .filter-btn[data-filter="all"].active { 
    background: linear-gradient(135deg, #0000ff 0%, #00d2ff 100%); 
    color: #fff; 
    box-shadow: 0 0.5rem 2rem rgba(0, 0, 255, 0.3);
}

.package-list-menu .filter-btn[data-filter="tg"]:hover, .package-list-menu .filter-btn[data-filter="tg"].active { 
    border-color: #0000ff; 
    color: #0000ff; 
    background: rgba(0, 0, 255, 0.08);
}

.package-list-menu .filter-btn[data-filter="cs"]:hover, .package-list-menu .filter-btn[data-filter="cs"].active { 
    border-color: #0056b3; 
    color: #0056b3; 
    background: rgba(0, 86, 179, 0.08);
}

.package-list-menu .filter-btn[data-filter="pn"]:hover, .package-list-menu .filter-btn[data-filter="pn"].active { 
    border-color: #00d2ff; 
    color: #00d2ff; 
    background: rgba(0, 210, 255, 0.08);
}

.package-list-menu .filter-btn[data-filter="nam"]:hover, .package-list-menu .filter-btn[data-filter="nam"].active { 
    border-color: #20c997; 
    color: #20c997; 
    background: rgba(32, 201, 151, 0.08);
}

.package-list-menu .filter-btn[data-filter="nt"]:hover, .package-list-menu .filter-btn[data-filter="nt"].active { 
    border-color: #17a2b8; 
    color: #17a2b8; 
    background: rgba(23, 162, 184, 0.08);
}

.package-list-menu .filter-btn[data-filter="ut"]:hover, .package-list-menu .filter-btn[data-filter="ut"].active { 
    border-color: #0d6efd; 
    color: #0d6efd; 
    background: rgba(13, 110, 253, 0.08);
}

.package-list-menu .filter-btn[data-filter="hn"]:hover, .package-list-menu .filter-btn[data-filter="hn"].active { 
    border-color: #6f42c1; 
    color: #6f42c1; 
    background: rgba(111, 66, 193, 0.08);
}

.package-list-menu .filter-btn[data-filter="nhi"]:hover, .package-list-menu .filter-btn[data-filter="nhi"].active { 
    border-color: #198754; 
    color: #198754; 
    background: rgba(25, 135, 84, 0.08);
}

.package-list-menu .filter-btn.active {
    transform: scale(1.05);
}

/* Grid Layout */
.package-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2.5rem;
    max-width: 140rem;
    margin: 0 auto;
    transition: all 0.5s ease;
}

@media (max-width: 1200px) {
    .package-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .package-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .package-grid {
        grid-template-columns: 1fr;
    }
}

.package-card {
    background: #fff;
    border-radius: 2rem;
    overflow: hidden;
    box-shadow: 0 1.5rem 4rem rgba(0, 0, 255, 0.08);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid rgba(0, 0, 255, 0.05);
    position: relative;
}

.package-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 255, 0.02) 0%, rgba(0, 210, 255, 0.02) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.package-card:hover {
    transform: translateY(-1.5rem) scale(1.02);
    box-shadow: 0 2.5rem 6rem rgba(0, 0, 255, 0.15);
}

.package-card:hover::before {
    opacity: 1;
}

.card-img {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
}

.card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.package-card:hover .card-img img {
    transform: scale(1.1);
}

.category-tag {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: linear-gradient(135deg, #0000ff 0%, #00d2ff 100%);
    color: #fff;
    padding: 0.5rem 1.5rem;
    border-radius: 2rem;
    font-size: 1.2rem;
    font-weight: 700;
    z-index: 1;
    box-shadow: 0 0.5rem 2rem rgba(0, 0, 255, 0.3);
    animation: pulse 3s infinite;
}

.card-info {
    padding: 2.5rem;
}

.card-info .date {
    font-size: 1.3rem;
    color: #888;
    margin-bottom: 1rem;
    display: block;
}

.card-info h2 {
    font-size: 2.2rem;
    color: #1a1a1a;
    margin-bottom: 2rem;
    font-weight: 700;
    transition: color 0.3s ease;
}

.package-card:hover .card-info h2 {
    color: #0000ff;
}

.view-detail-btn {
    width: 100%;
    padding: 1.2rem;
    background: transparent;
    border: 2px solid #0000ff;
    color: #0000ff;
    border-radius: 1rem;
    font-size: 1.5rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.view-detail-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 0, 255, 0.2), transparent);
    transform: translateX(-100%);
    transition: transform 0.5s ease;
}

.view-detail-btn:hover {
    background: linear-gradient(135deg, #0000ff 0%, #00d2ff 100%);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 1rem 3rem rgba(0, 0, 255, 0.3);
}

.view-detail-btn:hover::before {
    transform: translateX(0);
}

/* Detail Sections */
.package-details-container {
    max-width: 100rem;
    margin: 0 auto;
}

.package-detail-content {
    display: none; /* Hidden by default */
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.package-detail-content.active {
    display: block;
}

.detail-layout {
    display: flex;
    gap: 4rem;
    background: #fff;
    padding: 4rem;
    border-radius: 3rem;
    box-shadow: 0 2rem 5rem rgba(0, 0, 0, 0.1);
}

.detail-img {
    flex: 0 0 40%;
    border-radius: 2rem;
    overflow: hidden;
    aspect-ratio: 1 / 1;
}

.detail-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.detail-info {
    flex: 1;
}

.detail-info h2 {
    font-size: 3.2rem;
    color: #0000ff;
    margin-bottom: 1rem;
}

.publish-date {
    font-size: 1.4rem;
    color: #999;
    margin-bottom: 2.5rem;
}

.description {
    font-size: 1.6rem;
    color: #555;
    line-height: 1.8;
    margin-bottom: 3.5rem;
}

.description ul {
    margin-top: 1.5rem;
    padding-left: 2rem;
}

.description ul li {
    margin-bottom: 0.8rem;
}

.detail-actions {
    display: flex;
    gap: 2rem;
}

.hide-detail-btn, .buy-now-btn {
    padding: 1.5rem 3rem;
    border-radius: 1.2rem;
    font-size: 1.6rem;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
    text-align: center;
    border: none;
}

.hide-detail-btn {
    background: #eee;
    color: #555;
}

.hide-detail-btn:hover {
    background: #ddd;
}

.buy-now-btn {
    background: linear-gradient(90deg, #0000ff, #00d2ff);
    color: #fff;
    flex: 1;
}

.buy-now-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 1rem 2rem rgba(0, 0, 255, 0.3);
}

/* Visibility classes */
.package-grid.hidden {
    display: none;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .package-list-menu ul {
        justify-content: flex-start;
        flex-wrap: nowrap;
        overflow-x: auto;
        padding: 1rem;
        border-radius: 1rem;
        -webkit-overflow-scrolling: touch;
    }
    .package-list-menu ul li {
        flex: 0 0 auto;
    }
    .package-list-menu ul::-webkit-scrollbar {
        height: 4px;
    }
    .package-list-menu ul::-webkit-scrollbar-thumb {
        background: #ccc;
        border-radius: 10px;
    }
}