body {
    margin: 0;
    font-family: 'Times New Roman', sans-serif;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px 20px;
/*    background-color: rgba(0, 0, 0, 0.7);*/
    color: #fff;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 10;
}

.header_logo img {
	align-items: center;
    max-width: 210px;
}

.red_button {
	
    display: inline-block;
    background-image: url('red_buttom.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    width: 200px;
    height: 100px;
    color: white;
    text-align: center;
    line-height: 100px;
    border: none;
    cursor: pointer;
    transition: transform 0.3s;	
}

.red_button:hover {
    transform: scale(1.05);
}

.nav {
    display: flex;
    padding: 10px;
    align-items: center;

    background-color: rgba(0, 0, 0, 0.7);
}

.nav_list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
	padding-right: 50px;
    justify-content: center;
    flex: 1;
}

.nav_item {
    margin-top: 10px;
    margin-bottom: 10px;
    margin-left: 3px;
    margin-right: 2px;
}

.nav_item a {
    color: #fff;
    text-decoration: none;
    font-size: 1rem;
    padding: 10px;
}

.nav_item a:hover {
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 5px;
}

.burger_menu {
    display: none;
    flex-direction: column;
    cursor: pointer;
    top: 20px;
    padding-right: 65px;
    z-index: 11;
}

.burger_menu span {
    width: 45px;
    height: 7px;
    background-color: #6699cc;
    margin: 5px 0;
}

.main-content {
    padding-top: 70px;
}

.lenta {
    margin: 20px;
}
.lenta_section{
    margin-top: 5vw;
}
.lenta_section, .lenta_block, .lenta_block-1 {
    margin-bottom: 40px;
}

.section_title, .highlight_text {
    font-size: 2.1vw;
    color: #6699cc;
    margin: 10px 0;
}
.white_text {
    font-size: 1.2em;
    color: white;
    text-align: justify;
}

.section_content, .lenta_content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}

.text_content {
    flex: 1 1 60%;
    padding: 10px;
    font-size: 1.2vw;
    color: #333;
    text-align: justify;
}

.image_content {
    flex: 1 1 35%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.image_content img {
    max-width: 40%;
    height: auto;
}
.image_content_2 {
    flex: 1 1 35%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.image_content_2 img {
    max-width: 60%;
    height: auto;
}

.dark_section {
    background-color: #333;
    color: #fff;
    padding: 20px;
    border-radius: 10px;
}

.separator {
    width: 100%;
    height: 0.5vw;
    background-color: #6699cc;
    margin: 20px 0;
}

@media (max-width: 1170px) {
    .image_content img {
        max-width: 100%;
        height: auto;
    }
    .image_content_2 img {
        max-width: 100%;
        height: auto;
    }
    .nav{
        background-color: rgba(0, 0, 0, 0.0);
    }
    .nav_list {
        flex-direction: column;
        display: none;
        width: 100%;
        background-color: rgba(0, 0, 0, 0.9);
        position: absolute;
        top: 85px;
        left: 0;
        z-index: 9;
    }

    .red_button {
        width: 200px;
        height: 75px;
        line-height: 75px;
    }

    .header_logo img {
        max-width: 140px;
    }

    .nav_list.active {
        display: flex;
    }

    .burger_menu {
        display: flex;
    }

    .section_content, .lenta_content {
        flex-direction: column;
    }

    .text_content, .image_content {
        flex: 1 1 100%;
    }

    .text_content {
        font-size: 1rem;
    }

    .section_title, .highlight_text {
        font-size: 1.5rem;
    }

    .separator {
        height: 0.3vw;
    }
	
	.nav_item {
        margin: 10px 0;
    }
}

@media (max-width: 480px) {
    .image_content img {
        max-width: 100%;
        height: auto;
    }
    .image_content_2 img {
        max-width: 100%;
        height: auto;
    }
    .nav{
        background-color: rgba(0, 0, 0, 0.0);
    }
    .nav_item a {
        font-size: 0.9rem;
    }

    .header {
        padding: 5px 10px;
    }
    .header_logo img {
        align-items: center;
        max-width: 70px;
    }
    .red_button {
        width: 120px;
        height: 60px; 
        font-size: 0.6rem;
    }
}