html {
    scroll-behavior: smooth;
}

h1 {
    font-size: 26px;
    text-align: justify;
}

h3 {
    font-size: 24px;
    text-align: center;
    margin: 15px 0 8px 0;
}

h4 {
    font-size: 22px;
    text-align: justify;
}

h5 {
    font-size: 20px;
    text-align: center;
}

.menu {
    margin-top: 45px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.problem_menu {
    font-size: 22px;
    cursor: pointer;
}
.problem_menu:hover {
    color: #1a90d0;
}

.problem_menu_li {
    font-size: 20px;
    cursor: pointer;
    text-indent: 20px;
}
.problem_menu_li:hover {
    color: #1a90d0;
}

.problem {
    margin: 15px 0 8px 0;
    display: flex;
    flex-direction: column;
}

.problem_text {
    font-size: 20px;
    text-align: justify;
    line-height: 1.5;
}

.problem_text__discription {
    font-size: 22px;
    text-align: justify;
    line-height: 1.5;
}

img {
    margin-left: auto;
    margin-right: auto;
}

ul {
    list-style: none;
}

.problem_li {
    position: relative;
    padding-left: 3px;
}

.problem_li::before {
    position: absolute;
    content: "";
    background: url(/about/../../images/icons/check.svg) center center / cover no-repeat;
    width: 0.7em;
    height: 0.7em;
    left: -20px;
    top: 0.4em;
}

.scroll_up {
    position: fixed;
    right: 40px;
    bottom: 40px;
    height: 50px;
    width: 50px;
}


@media (max-width: 900px) {
    h1 {
        font-size: 20px;
    }
    h3 {
        font-size: 18px;
    }
    h4 {
        font-size: 16px;
    }
    h5 {
        font-size: 14px;
    }
    .problem_menu {
        font-size: 16px;
    }
    .problem_menu_li {
        font-size: 14px;
        text-indent: 0;
    }
    .problem_text {
        font-size: 14px;
    }
    img {
        width: 90%
    }
    .problem_text__discription {
        font-size: 20px;
    }
}

@media (max-width: 400px) {
    .scroll_up {
        height: 40px;
        width: 40px;
    }
}