html, body {
    height: 100%;
    font-family: Arial, Helvetica, sans-serif;
    margin: 20px;
    background-color: #e0e0e0;
}

#tools {
    display: flex;
    flex-wrap: nowrap;
    align-items: flex-start;
    justify-content: space-between;
}
#tools>.controls {
    background-color: #fff;
    width: 100%;
    padding: 20px;
}
#tools>.controls>h3 {
    color: #666;
    margin: 0 0 15px 0;
}
#tools>.controls>.flex {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
}
#tools>.controls>.flex>.form-group {
    width: 40%;
    margin-bottom: 15px;
}
#tools>.controls>.flex>.form-group>label {
    display: block;
    color: #666;
    font-size: 10px;
    text-transform: uppercase;
    margin-bottom: 5px;
    font-weight: bold;
}
#tools>.controls>.flex>.form-group>input,
#tools>.controls>.flex>.form-group>select {
    display: block;
    width: 100%;
    border: 1px solid #ddd;
    height: 34px;
    text-indent: 10px;
}
#tools>.controls>.flex>.form-group.checkbox>label {
    margin: 12px 0 0 0;
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
}

@media(max-width: 550px) {
    #tools {
        display: block;
    }
    #tools>.controls {
        width: calc(100% - 40px) !important;
        margin-bottom: 15px;
        display: block;
    }
    #tools>.controls>.flex {
        display: block;
    }
    #tools>.controls>.flex>.form-group {
        width: 100%;
        margin-bottom: 15px;
    }
}
@media(max-width: 1150px) {
    #tools>.controls {
        width: 40%;
    }
}