* {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1980px;
    padding: 0 45px;
    margin: 0 auto;
}

/* HEADER */

.header {
    width: 100%;
    color: white;
    padding: 20px;
    background: blue;
    box-sizing: border-box;
}

.menu-item {
    list-style: none;
}

.menu-link {
    color: white;
    text-decoration: none;
    text-transform: uppercase;
    font-weight: bold;
}

.banner-title, .banner-description, .banner-opisanie {
    text-align: center;
    color: white;
}

.banner-title {
    font-size: 48px;
}

.banner-opisanie {
    font-size: 24px;
    padding-bottom: 10px;
}

.banner-section {
    padding: 100px 0;
    background: url(img/banner-bg.jpg);
    background-size: cover;
    background-position: center;
}

/*CARDS*/

.cards-section {
    padding: 50px 0px;
}

.cards-title, .cards-description {
    color: #000000;
    text-align: center;
}

.card {
    padding: 25px;
    margin-top: 25px;
    width: 25%;
    background: white;
    box-shadow: 0px 2px 7px 0px #9e90ff;
    text-align: start;
/* box-shadow: 0px 2px 7px 0px
          1.  0px - отступ по оси X
          2.  2px - отступ по оси Y
          3.  7px - радиус размытия
          4.  0px - растяжение */
}

.card-button {
    text-align: center;
    background: #0008e5;
    padding: 10px 50px;
    border-radius: 10px;
    cursor: pointer;
}

.card:hover {
    box-shadow: 2px 10px 30px 0px #60579c;
}

.card-link {
    text-decoration: none;
    color: white;
}


.card-title, .card-text {
    margin-bottom: 10px;
}



/* Подвал */

.footer {
    background: url(img/footer-bg.jpg);
    background-size: cover;
    padding: 100px 0px;
}

.copyright {
    color: white;
}

/* экспипемент с ползунком */

body::-webkit-scrollbar {
    width: 12px;
}

body::-webkit-scrollbar-track {
    background-color: white;
}

body::-webkit-scrollbar-thumb {
    background-color: #60579c;
    border-radius: 20px;
    box-shadow: 0px 2px 7px 0px black;
}

body::-webkit-scrollbar-thumb:hover {
    background-color: aquamarine;
}

@media screen and (max-width: 850px) {
    .cards-row {
        justify-content: center;
        flex-wrap: wrap;
    }
}

@media screen and (max-width: 850px){
    .card {
        width: auto;
    }
    .logo-img {
        display: none;
    }
    .header-logo {
        display: none;
    }
    .menu-item {
        display: none;
    }
}

@media screen and (max-width: 850px) {
    .footer-search, .footer-search-input, .footer-search-button, .social-networks {
        width: 100%;
        margin-bottom: 10px;
        margin-right: 0;
    }
    .footer-search, .footer-row {
        flex-wrap: wrap;
        
    }
}

@media screen and (max-width: 850px) {
    .banner-title {
        font-size: xx-large;
    }
}



/*выпадающее меню */

.dropbtn {
    color: rgb(0, 0, 0);
    background: aqua;
    border: none;
    cursor: pointer;
}

.dropdown {
    
    text-align: center;
    background: aqua;
    padding: 10px 50px;
    border-radius: 10px;
    cursor: pointer;
}

.dropdown-content {
    margin-top: 10px;
    
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}

.dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.dropdown-content a:hover {
    background-color: #f1f1f1;
}

.dropdown:hover .dropdown-content {
    display: block;
}