.header {
    padding: 17px 0;
    border-bottom: 1px solid #d6d6d6;
}

.header_row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}


.header_nav {
    font-weight: 500;
    color: #292929;
}

.header_nav ul {
    display: flex;
    margin-left: 172px;
}

/* header_nav li + li { margin-left: 70px } */
.header_nav li:not(:last-child) {
    margin-right: 70px;
}

.header_nav a {
    transition: color .2s ease;
}

.header_nav a:hover {
    color: #01996D;
}

.header_login {
    display: flex;
    align-items: center;
    margin-left: auto;

}

.header_login > * + * {
    margin-left: 35px;
}

.header_login a {
    color: black;
}

.header_login a:hover {
    color: #01996D;
    transition: color .2s ease;
}

@media (max-width: 1265px) {
    .header_nav ul {
        margin-left: 50px;
    }
}


@media (max-width: 1120px) {
    .header_nav li:not(:last-child) {
        margin-right: 50px;
    }
}

@media (max-width: 1050px) {
    .header_nav li:not(:last-child) {
        margin-right: 30px;
    }
    .header_nav ul {
        margin-left: 30px;
    }
}

@media (max-width: 950px) {
    .header_nav {
        font-size: 20px;
    }
    .header_nav li:not(:last-child) {
        margin-right: 20px;
    }
}

@media (max-width: 860px) {
    .header_nav, .header_login{
        display: none;
    }
    
}

.btn, a.btn {
    /*  
    display: inline-block;
    height: 51px; 
    line-height: 51px;
    выравнивани текста в кнопке */

    min-height: 51px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #01996D;
    padding-left: 50px;
    padding-right: 50px;
    font-weight: 400;
    font-size: 20px;
    color: #fff;
    border-radius: 4px;
    transition: opacity .2s ease;
}

.btn:hover, a.btn:hover {
    opacity: 0.8;
    color: #fff;
}

.btn_big, a.btn_big {
    min-height: 65px;
}

@media (max-width: 770px) {
    .btn, a.btn {
        min-height: 45px;
        font-size: 18px;
        padding-left: 30px;
        padding-right: 30px;
    }
    .header_login > * + * {
        margin-left: 20px;
    }

}