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

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

.certificate-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    overflow: hidden;
    position: relative;
}

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

.certificate-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    transition: transform 0.3s ease;
}

.certificate-card:hover .certificate-image {
    transform: scale(1.02);
}

.certificate-content {
    padding: 1.5rem;
    background: linear-gradient(to bottom, transparent, rgba(255, 255, 255, 0.9));
}

.certificate-card a {
    text-decoration: none;
}

.certificate-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
    color: #333;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    padding: 1rem;
    max-width: 1400px;
    margin: 0 auto;
}

@media (max-width: 1024px) {
    .certificates-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .certificates-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: 1.25rem;
        padding: 0.75rem;
    }

    .certificate-title {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .certificates-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .certificate-card {
        max-width: 100%;
    }

    .certificate-content {
        padding: 1rem;
    }
}

/* Stagger animation delay for grid items */
.certificates-grid > div {
    animation: fadeInUp 0.6s ease backwards;
}

.certificates-grid > div:nth-child(1) { animation-delay: 0.1s; }
.certificates-grid > div:nth-child(2) { animation-delay: 0.2s; }
.certificates-grid > div:nth-child(3) { animation-delay: 0.3s; }
.certificates-grid > div:nth-child(4) { animation-delay: 0.4s; }
.certificates-grid > div:nth-child(5) { animation-delay: 0.5s; }
.certificates-grid > div:nth-child(6) { animation-delay: 0.6s; }
.certificates-grid > div:nth-child(7) { animation-delay: 0.7s; }
.certificates-grid > div:nth-child(8) { animation-delay: 0.8s; }
.certificates-grid > div:nth-child(9) { animation-delay: 0.9s; }

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