#koszyk{
    display: flex;
    flex-direction: column;
    width: 100%;
}
.pre-reservation {
    border: 1px solid #dcdcdc;
    border-radius: 5px;
    width: 350px;
    margin: auto;
    margin-bottom: 20px;
    padding: 20px;
}
.pre-reservation:first-of-type{
    margin-top: 40px;
}
.heading{
    display: flex;
    justify-content: space-between;
}
.summary{
    background: #7ED321;
    border-radius: 5px;
    color: #fff;
    font-size: 24px;
    font-weight: 300;
    margin: 20px 0;
    margin-top: 20px;
    padding: 18px 25px;
}

#dodaj-kolejne-zamowienie{
    width: 250px;
    background-color: #7ED321;
    border: none;
    border-radius: 5px;
    color: #fff;
    cursor: pointer;
    font-size: 16px;
    letter-spacing: 0;
    padding: 13px 13px 13px 13px;
    text-transform: none;
}

#podsumowanie{
    width: 250px;
    background-color: #7ED321;
    border: none;
    border-radius: 5px;
    color: #fff;
    cursor: pointer;
    font-size: 16px;
    letter-spacing: 0;
    padding: 13px 13px 13px 13px;
    text-transform: none;
}
#buttons{
    width: 670px;
    display: flex;
    justify-content: space-between;
    margin: auto;
    margin-bottom: 10px;
}
.usun{
    width: 250px;
    background-color: #7ED321;
    border: none;
    border-radius: 5px;
    color: #fff;
    cursor: pointer;
    font-size: 16px;
    letter-spacing: 0;
    padding: 7px 7px 7px 7px;
    text-transform: none;
    margin-top: 10px;
}
@media only screen and (max-width: 900px) {
    .pre-reservation {
        width: 308px;
        font-size: 18px;
    }

    #buttons {
        width: 350px;
    }
    #podsumowanie {
        width: 165px;
        font-size: 22px;
    }
    #dodaj-kolejne-zamowienie {
        width: 165px;
        font-size: 22px;
    }
    .usun{
        font-size: 22px;
    }
    .price-checkout{
        font-size: 18px;
    }
    .price{
        font-size: 46px;
    }
}