Tip.css

*{
    box-sizing: border-box;
    font-family: 'Space Mono';
}

p{
    font-weight: 700;
    margin: 0;
}

button{
    font-weight: 700;
}

body{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 54px;
    height: 100vh;
    margin: 0;
    background-color: hsl(185, 41%, 84%);
}

.main{
    display: flex;
    justify-content: space-between;
    width: 920px;
    max-width: 100%;
    border-radius: 25px;
    padding: 32px 33px 8px 47px;
    background-color: white;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.section{
    display: flex;
    flex-direction: column;
    width: 45%;
}

.p-bill{
    margin: 14px 0 8px 0;
}

input{
    font-size: 24px;
    font-weight: 700;
    color: hsl(183, 100%, 15%);
    background-color: hsl(202, 50%, 97%);
}

input[type='number']:focus{
    outline: hsl(172, 67%, 45%);
}

.input{
    text-align: right;
    cursor: pointer;
}

.p-heading{
    color: hsl(186, 14%, 43%);
}

.bill{
    background: url(images/icon-dollar.svg) no-repeat scroll 20px center;
    width: 100%;
    padding: 5px 16px 5px 30px;
    border: 2px solid transparent;
    border-radius: 5px;
    margin-bottom: 40px;
    background-color: hsl(202, 50%, 97%);
}

#bill:focus{
    border: 2px solid hsl(172, 67%, 45%);
}

.p-tip{
    margin-bottom: 16px;
}

.button-holder{
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 15px;
    margin-bottom: 36px;
}

.percent{
    font-size: 24px;
    width: 100%;
    height: 48px;
    border: 0;
    border-radius: 6px;
    color: white;
    background-color: hsl(183, 100%, 15%);
    cursor: pointer;
}

.percent.selected {
    color: hsl(183, 100%, 15%);
    background-color: hsl(172, 67%, 45%);
}

.percent:hover{
    color: hsl(183, 100%, 15%);
    background-color: hsl(173, 61%, 76%);;
}

.percent:focus{
    color: hsl(183, 100%, 15%);
    background-color: hsl(172, 67%, 45%);
}

.input-button-holder{
    height: 48px;
    width: 100%;
    border: 0;
    padding: 0;
    background-color: transparent;
}

.button-input{
    width: 100%;
    height: 100%;
    border: 2px solid transparent;
    border-radius: 6px;
    text-align: center;
}

.people-holder{
    display: flex;
    justify-content: space-between;
    margin-bottom: 6px;
}

.people{
    background: url(images/icon-person.svg) no-repeat scroll 20px center;
    width: 100%;
    padding: 5px 16px 5px 30px;
    border: 2px solid transparent;
    border-radius: 5px;
    background-color: hsl(202, 50%, 97%);
    margin-bottom: 43px;
}

.people:focus{
    border: 2px solid hsl(172, 67%, 45%);
}

#zeroPeople{
    color: red;
}

.article{
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 49%;
    height: 100%;
    max-height: 420px;
    padding: 44px 39px;
    border-radius: 14px;
    background-color: hsl(183, 100%, 15%);
}

.pricing{
    display: flex;
    flex-direction: column;
    gap: 28px;
}

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

.per-person {
    width: 28%;
}

.heading-article{
    margin: 0;
    color: white;
}

.article-per-person{
    font-size: 13px;
    font-weight: 400;
    margin: 0;
    color: hsl(184, 14%, 56%);
}

.article-price{
    font-size: 46px;
    margin: 0;
    color: hsl(172, 67%, 45%);
    overflow: hidden;
}

.reset{
    height: 48px;
    width: 100%;
    font-size: 24px;
    letter-spacing: -1px;
    border: 0;
    border-radius: 6px;
    color: hsl(183, 100%, 15%);
    background-color: hsl(172, 67%, 45%);
    cursor: pointer;
}

.reset:hover{
    background-color: hsl(173, 61%, 76%);
}

.hidden{
    display: none;
}

@media screen and (max-width: 940px), (max-height: 625px){
    body{
        justify-content: normal;
        height: auto;
    }

    .logo{
        margin-top: 50px;
    }

    .main{
        flex-direction: column;
        width: 90%;
        padding: 35px;
        margin-bottom: 40px;
    }

    .section{
        width: 100%;
    }

    .article{
        width: 100%;
    }

    .pricing{
        margin-bottom: 20px;
    }

    .per-person {
        width: auto;
        min-width: 72px;
    }
}

@media screen and (max-width: 600px){
    .main{
        width: 94%;
        padding: 30px 18px;
    }

    .button-holder{
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 1fr 1fr 1fr;
    }

    .article{
        padding: 35px 20px;
    }

    .article-price{
        font-size: 42px;
    }
}

@media screen and (max-width: 425px){
    .main{
        width: 96%;
        padding: 30px 16px;
    }

    .article{
        padding: 35px 16px;
    }

    .article-price{
        font-size: 36px;
    }
}

@media screen and (max-width: 375px){
    .main{
        width: 97%;
        padding: 25px 12px;
    }

    .article{
        padding: 25px 12px;
    }

    .article-price{
        font-size: 30px;
    }
}