body {
    background-color: rgb(166, 165, 165);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

.outer-container{
    display: flex;
    justify-content: center;
    align-items: center;
}
.inner-container {
    margin-top: 5%;
    padding: 9px 20px 20px 20px;
    border: solid black 3px;
}
form {
    text-align: center;
}
.result-block {
    text-align: center;
}
#result_label, #result_val {
    display: inline-block;
}

button {
    width: 100px;
    height: 28px;
    background-color: lightsteelblue;
    display: inline-block;
    border-radius: 5px;
    font-size: 15px;
    margin-top: 25px;
}
/* #calc {
    margin-left: 12%;
} */
h1 {
    text-align: center;
}
#weight-guide {
    text-align: center;
}