main.css

html{
    box-sizing: border-box;
}

*,
*::before,
*::after{
    box-sizing: inherit;
}

body{
    min-height: 100vh;
    font-family: 'Roboto', sans-serif;
    background:  url('./img/weather.jpg') no-repeat;
    background-size: cover;
    margin: 0;
}

.weather{
    max-width: 1350px;
    margin: 0 auto;
    padding: 0 30px;
}

.weather h2{
    color: #fff;
    width: 250px;
    text-align: center;
    margin: 0 auto;
    padding: 20px 0;
    text-transform: uppercase;
}

#city_form{
    font-size: 0;
    margin-bottom: 25px;
}

#city_input{
    outline: none;
    width: 250px;
    padding: 10px;
    border: 1px solid #212121;
    border-radius: 5px;
    background: #fff;
    color: #212121;
    cursor: pointer;
}

#city_btn{
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    width: 150px;
    padding: 10px;
    margin-left: 10px;
    border: 1px solid #212121;
    border-radius: 5px;
    background: #edbe11;
    color: #212121;
    cursor: pointer;
    transition: color .25s ease-in-out;
}

#city_btn:hover{
    color: #fff;
}

#city_output{
    display: flex;
    flex-flow: row wrap;
    margin: 15px 0;
    gap: 20px 30px;
}

#city_error{
    color: crimson;
    margin: 15px 0;
}

.card{
    background-color: white;
    background-image: url('./img/close.svg');
    background-size: 30px;
    background-position: 265px 5px;
    background-repeat: no-repeat;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    font-size: 14px;
    width: 300px;
    border: 1px solid #212121;
    border-radius: 8px;
    cursor: pointer;
}

.card_title, .name{
    font-size: 18px;
    font-weight: 600;
    padding-bottom: 5px;
    margin-right: 35px;
}

.card div{
    cursor: auto;
    padding: 10px;
}

@media (max-width: 690px) {
    .weather{
        padding: 0 10px;
    }

    #city_form{
        display: flex;
        flex-direction: column;
    }

    #city_input {
        width: 300px;
        margin: 0 auto;
    }

    #city_btn {
        width: 300px;
        margin: 10px auto 0;
    }

    #city_output {
        display: flex;
        flex-direction: column;
        flex-wrap: wrap;
        align-items: center;
        margin: 15px auto;
        gap: 20px 30px;
    }
}