.certificates-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 34px 28px;
}

.certificate-card {
    display: block;
    text-align: center;
}

.certificate-card__image {
    height: 270px;
    padding: 14px;
    background: #f7fbfd;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: 0.35s ease;
}

.certificate-card__image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: 0.35s ease;
}

.certificate-card:hover .certificate-card__image {
    box-shadow: 0 18px 45px rgba(5,33,48,0.12);
}

.certificate-card:hover img {
    transform: scale(1.04);
}

.certificate-card__content {
    padding-top: 16px;
}

.certificate-card__content h3 {
    font-size: 16px;
    font-weight: 500;
    line-height: 1.45;
    color: var(--color-dark);
}

.certificate-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 40px 80px;
    background: rgba(5, 33, 48, 0.86);
}

.certificate-modal.is-open {
    display: flex;
}

.modal-open {
    overflow: hidden;
}

.certificate-modal__content {
    max-width: 900px;
    width: 100%;
    text-align: center;
}

.certificate-modal__content img {
    max-width: 100%;
    max-height: 78vh;
    margin: 0 auto;
    object-fit: contain;
    background: #ffffff;
}

.certificate-modal__content h3 {
    margin-top: 18px;
    color: #ffffff;
    font-size: 20px;
    font-weight: 700;
}

.certificate-modal__close,
.certificate-modal__prev,
.certificate-modal__next {
    position: absolute;
    z-index: 2;
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background: #ffffff;
    color: var(--color-dark);
    font-size: 38px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.certificate-modal__close {
    top: 24px;
    right: 24px;
}

.certificate-modal__prev {
    left: 24px;
    top: 50%;
    transform: translateY(-50%);
}

.certificate-modal__next {
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
}

.certificate-modal__close:hover,
.certificate-modal__prev:hover,
.certificate-modal__next:hover {
    background: var(--color-primary);
    color: #ffffff;
}

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

@media (max-width: 768px) {
    .certificates-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 26px 16px;
    }

    .certificate-card__image {
        height: 220px;
    }

    .certificate-modal {
        padding: 70px 18px 30px;
    }

    .certificate-modal__content img {
        max-height: 72vh;
    }

    .certificate-modal__close,
    .certificate-modal__prev,
    .certificate-modal__next {
        width: 44px;
        height: 44px;
        font-size: 30px;
    }

    .certificate-modal__prev {
        left: 12px;
    }

    .certificate-modal__next {
        right: 12px;
    }
}

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