/* Patent Certificates Page Styles */
.patent-certificates-container {
    width: 90%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 20px;
}

.patent-certificates-title {
    text-align: center;
    margin-bottom: 50px;
}

.patent-certificates-title h2 {
    font-size: 35px;
    font-weight: bold;
    color: #333;
    display: inline-block;
    position: relative;
    margin-bottom: 20px;
}

.patent-certificates-title h2::after {
    content: "";
    display: block;
    margin: 0 auto;
    margin-top: 8px;
    width: 35%;
    border-bottom: 6px solid rgb(254, 202, 10);
}

/* Vertical Certificates Grid (First 7) */
.patent-vertical-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
    justify-items: center;
}

.patent-certificate-item {
    position: relative;
    width: 100%;
    max-width: 400px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.patent-certificate-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.patent-certificate-item.vertical img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

/* Horizontal Certificate (Last one) */
.patent-horizontal-section {
    width: 100%;
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.patent-certificate-item.horizontal {
    max-width: 800px;
    width: 100%;
}

.patent-certificate-item.horizontal img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

/* Lightbox Modal */
.patent-lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    overflow: auto;
    animation: fadeIn 0.3s;
}

.patent-lightbox.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.patent-lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    margin: auto;
    animation: zoomIn 0.3s;
}

.patent-lightbox-content img {
    width: 100%;
    height: auto;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 8px;
}

.patent-lightbox-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #fff;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}

.patent-lightbox-close:hover {
    color: #f1f1f1;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes zoomIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 1200px) {
    .patent-certificates-container {
        width: 95%;
        padding: 30px 15px;
    }
    
    .patent-vertical-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 25px;
    }
}

@media (max-width: 992px) {
    .patent-certificates-title h2 {
        font-size: 30px;
    }
    
    .patent-vertical-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }
    
    .patent-certificate-item.horizontal {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .patent-certificates-container {
        width: 98%;
        padding: 20px 10px;
    }
    
    .patent-certificates-title {
        margin-bottom: 30px;
    }
    
    .patent-certificates-title h2 {
        font-size: 28px;
    }
    
    .patent-certificates-title h2::after {
        width: 40%;
        margin-top: 6px;
    }
    
    .patent-vertical-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 15px;
        margin-bottom: 30px;
    }
    
    .patent-horizontal-section {
        margin-top: 30px;
    }
    
    .patent-lightbox-close {
        top: 15px;
        right: 25px;
        font-size: 35px;
    }
}

@media (max-width: 600px) {
    .patent-certificates-title h2 {
        font-size: 24px;
    }
    
    .patent-vertical-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .patent-certificate-item {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .patent-certificates-container {
        padding: 15px 5px;
    }
    
    .patent-certificates-title h2 {
        font-size: 22px;
    }
    
    .patent-certificates-title h2::after {
        width: 50%;
        margin-top: 4px;
    }
    
    .patent-vertical-grid {
        gap: 15px;
        margin-bottom: 25px;
    }
    
    .patent-lightbox-close {
        top: 10px;
        right: 20px;
        font-size: 30px;
    }
}