header {
    width: var(--width);
    margin: 0 auto;
    background-color: #fff;
    border-radius: 5px;
    border: 1px solid #ddd;
    padding: 15px 35px;
}

.logo {
    width: var(--logo, 200px);
}

.head-top {
    display: flex;
    column-gap: 20px;
    color: #3c7cdc;
    font-size: 21px;
    align-items: center;
}

nav>ul {
    display: flex;
    background-color: #378de5;
    border-radius: 10px;
    overflow: hidden;
}

nav>ul>li {
    flex: 1;
}

nav>ul>li>a {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 0;
    font-size: 17px;
    color: #fff;
    text-transform: uppercase;
}

nav>ul>li>a:hover {
    background-color: #555;
}

.big-sear {
    width: var(--width);
    background-color: #fff;
    border-radius: 5px;
    border: 1px solid #ddd;
    margin: 15px auto;
    padding: 15px;
}

.searchBar {
    width: var(--searchBar);
    margin: 0 auto;
    display: flex;
}

#search {
    flex: 1;
    height: var(--button);
    border: 1px solid #ccc;
    border-radius: 5px 0 0 5px;
    font-size: 17px;
    text-indent: 1em;
    transition: .3s;
}

#search:focus {
    border-color: #66afe9;
    outline: 0;
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075), 0 0 8px rgba(102, 175, 233, .6);
}

#go {
    width: calc(var(--button) * 3);
    height: var(--button);
    color: #fff;
    background-color: #337ab7;
    border-color: #2e6da4;
    font-size: 18px;
    border-radius: 0 5px 5px 0;
}

#go:hover {
    background-color: #286090;
    border-color: #204d74;
}


@media screen and (max-width:769px) {
    header {
        padding: 10px 5px;
    }

    .head-top span {
        display: none;
    }

    nav>ul>li>a {
        font-size: .832rem;
    }

    .big-sear {
        padding: 10px 5px;
    }

    #search,#go {
        font-size: .832rem;
    }

    #go {
        width: calc(var(--button) * 2);
    }
}