.container {
    display: flex;
    flex-wrap: wrap;
}

.box {
    width: 100%;
}

@media screen and (min-width: 470px) {
    .box {
        justify-content: space-between;
        border-right: 5px solid #1d90e2;
    }
    a {
        width: 45%;
    }
    button {
        margin-top: 0;
    }
    #search {
        width: 60%;
    }
    #check-receipt {
        width: 30%;
    }
}

@media screen and (min-width: 750px) {
    .box {
        border-right: 8px solid #1d90e2;
    }
    .break {
        display: none;
    }
    a {
        width: unset;
    }
    button {
        margin-top: 0;
    }
    #staff {
        width: 73px;
    }
    .view-staff {
        width: 97px;
    }
    #receipt-label {
        margin-bottom: 0;
    }
    #search, #ckeck-receipt {
        width: unset;
    }
    #check-receipt {
        max-width: 170px;
    }
}

@media screen and (min-width: 850px) {
    .menu-container {
        max-width: 950px;
        margin-left: auto;
        margin-right: auto;
    }
    .box {
        align-items: center;
    }
}