.about-block {
    padding-bottom: 60px;
}

.about-block .wrapper {
    display: flex;
    gap: 30px;
}

.about-block .block-left-side,
.about-block .block-right-side {
    display: flex;
    flex-direction: column;
    width: 50%;
    height: fit-content;
}

.about-block .block-left-side {
    padding: 50px;
    background: var(--background-secondary);
    border: 1px solid var(--stroke);
    border-radius: 10px;
    position: sticky;
    top: 150px;
}

.about-block .certs-holder {
    margin-top: 40px;
    display: flex;
    gap: 30px;
    align-items: center;
}

.about-block .certs {
    width: calc(100% - 90px);
}

.about-block .cert-item {
    border: 1px solid var(--stroke);
    border-radius: 10px;
    overflow: hidden;
    height: auto;
    max-height: 360px;
    display: flex;
    position: relative;
    cursor: pointer;
}

.about-block .cert-item:before {
    content: "";
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    position: absolute;
    background-image: url(images/loopBig.png);
    background-position: center;
    background-repeat: no-repeat;
    transition: 0.5s;
    opacity: 0;
    background-color: rgba(0, 0, 0, 0.4);
}

.about-block .cert-item:hover:before {
    opacity: 1;
}

.about-block .cert-item img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    aspect-ratio: 1/1.5;
}

.about-block .nav-btns {
    flex-direction: column;
    margin-right: unset;
    margin-left: auto;
}

.about-block .cert-name {
    position: absolute;
    bottom: 20px;
    left: 20px;
    width: calc(100% - 40px);
    font-weight: 400;
    font-size: 16px;
    line-height: 140%;
    letter-spacing: 0.02em;
    color: var(--background);
    transition: 0.5s;
    opacity: 0;
}

.about-block .cert-item:hover .cert-name {
    opacity: 1;
}

.about-block .smet-holder {
    display: flex;
    border-radius: 10px;
    background: var(--hover);
    display: flex;
    overflow: hidden;
}

.about-block .smet-left-side {
    display: flex;
    flex-direction: column;
    padding: 30px 0px 30px 30px;
    max-width: 460px;
}

.about-block .smet-title {
    font-weight: 600;
    font-size: 28px;
    line-height: 125%;
    color: var(--background);
    margin-bottom: 15px;
}

.about-block .smet-desc {
    font-weight: 400;
    font-size: 20px;
    line-height: 140%;
    letter-spacing: 0.02em;
    color: var(--background);
    margin-bottom: 30px;
}

.about-block .smet-bot {
    display: flex;
    gap: 50px;
    align-items: center;
}

.about-block .bot-desc {
    font-weight: 400;
    font-size: 16px;
    line-height: 140%;
    letter-spacing: 0.02em;
    color: var(--background);
    max-width: 90px;
    position: relative;
}

.about-block .bot-desc:before {
    content: "";
    width: 1px;
    height: 90%;
    top: 5%;
    right: -27px;
    background: var(--stroke);
    position: absolute;
}

.about-block .smet-bot a {
    font-weight: 600;
    font-size: 20px;
    line-height: 125%;
    color: var(--background);
    white-space: nowrap;
}

.about-block .smet-bot a:hover {
    color: var(--primary);
}

.about-block .smet-img {
    width: auto;
    max-width: 230px;
    display: flex;
    height: 100%;
    margin-left: auto;
}

.about-block .smet-img img {
    width: 100%;
    height: 100%;
    display: block;
    object-position: right;
    object-fit: contain;
    margin: auto;
}

.about-block .advants {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 30px;
}

.about-block .advant-item {
    display: flex;
    flex-direction: column;
    background: var(--background-secondary);
    border: 1px solid var(--stroke);
    border-radius: 10px;
    min-height: 240px;
    padding: 30px;
}

.about-block .advant-icon {
    width: 60px;
    height: 60px;
    border-radius: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--hover);
    margin-bottom: 10px;
}

.about-block .advant-icon img {
    width: auto;
    height: auto;
    display: block;
    object-fit: contain;
    max-width: 60%;
    max-height: 60%;
}

.about-block .advant-name {
    font-weight: 600;
    font-size: 20px;
    line-height: 125%;
    margin-top: auto;
    margin-bottom: 5px;
}

.about-block .advant-desc {
    font-weight: 400;
    font-size: 16px;
    line-height: 140%;
    letter-spacing: 0.02em;
    color: var(--main-text-primary);
}


@media (max-width: 1400px) {
    .about-block .block-left-side {
        padding: 15px;
    }

    .about-block .certs-holder {
        margin-top: 20px;
    }

    .about-block .advants {
        margin-top: 10px;
        gap: 10px;
    }

    .about-block .advant-item {
        min-height: 170px;
        padding: 10px;
    }

    .about-block .advant-icon {
        width: 50px;
        height: 50px;
    }

    .about-block .smet-left-side {
        padding: 10px 0px 10px 10px;
    }

    .about-block .smet-title {
        font-size: 18px;
        margin-bottom: 10px;
    }

    .about-block .smet-desc {
        font-size: 14px;
        margin-bottom: 10px;
    }

    .about-block .block-left-side {
        top: 130px;
    }
}

@media (max-width: 1200px) {
    .about-block .smet-bot {
        gap: 20px;
    }

    .about-block .bot-desc:before {
        right: -10px;
    }

    .about-block {
        padding-bottom: 40px;
    }
}

@media (max-width: 996px) {
    .about-block .certs {
        width: calc(100% - 50px);
    }

    .about-block .certs-holder {
        gap: 10px;
    }

    .about-block .smet-bot {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }

    .about-block .bot-desc {
        max-width: unset;
    }

    .about-block .bot-desc:before {
        display: none;
    }

    .about-block .advant-icon {
        width: 40px;
        height: 40px;
    }

    .about-block .advant-name {
        font-size: 16px;
    }

    .about-block .advant-desc {
        font-size: 14px;
    }

    .about-block .advants {
        display: flex;
        flex-direction: column;
    }

    .about-block .advant-item {
        width: 100%;
        min-height: unset;
    }

    .about-block .block-left-side {
        top: 70px;
    }

    .about-block .bot-desc {
        font-size: 14px;
    }

    .about-block {
        padding-bottom: 30px;
    }
}

@media (max-width: 768px) {
    .about-block .wrapper {
        flex-direction: column;
        gap: 20px;
    }

    .about-block .block-left-side,
    .about-block .block-right-side {
        width: 100%;
    }

    .about-block .block-left-side {
        position: static;
    }
}