style.css

body{
    background-image: url("https://images.unsplash.com/photo-1587923623987-c7e4083beb23?ixid=MnwxMjA3fDB8MHxzZWFyY2h8MTR8fHN1bnxlbnwwfHwwfHw%3D&ixlib=rb-1.2.1&auto=format&fit=crop&w=800&q=60");
    background-size: cover;
    background-repeat: no-repeat;
    margin: 0;
}

#container{
    display: flex;
    flex-direction: column;
    flex-wrap: wrap;
    background-image: linear-gradient(rgba(233, 200, 200, 0.3), rgba(0, 0, 0, 0.6));
    min-height: 100vh;
    font-family: 'Roboto', sans-serif;
}

#header{
    display: flex;
    justify-content: center;
    margin-top: 30px;
}

#input{
    background-color: rgba(142, 127, 161, 0.3);
    border-radius: 20px;
    border: 3px solid #CDF3A2;
    padding: 15px;
    font-size: 20px;
}

#input:focus{
    background-color: #fff;
}

#when-where, #now{
    display: flex;
    flex-direction: column;
    align-items: center;
}

#city, #date, #temperature, #feelsLike, #conditions, #variation{
    color: #fff;
}

#city{
    font-size: 45px;
    font-weight: bold;
}

#date{
    font-size: 24px;
}

#temperature{
    font-size: 110px;
    font-weight: bold;
    text-shadow: 5px 10px black;
    margin: 0;
}

#feelsLike{
    font-size: 30px;
    font-weight: bold;
}

#conditions{
    font-size: 32px;
    font-weight: bold;
    font-style: italic;
}

#variation{
    font-size: 26px;
    font-weight: bold;
}

@media all and (max-width: 500px){
    #header{
        margin-top: 20px;
    }

    #feelsLike, #conditions{
        margin-bottom: 0;
    }

    #city{
        margin: 30px;
    }
}