body {
    font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";
}

label {
    display: inline-block;
    margin-bottom: .5rem;
}

footer {
    width: 21rem;
    text-align: center;
    margin: 3rem auto 0.5rem;
    padding: .5rem;
    background: #ada;
    border-radius: 2rem;
}

#code {
    width: 2rem;
}

#number {
    width: 6rem;
}

#ir {
    background-color: #28a745;
    border-color: #28a745;
    align-self: flex-end;
    width: 5rem;
}

#ir:hover {
    background-color: #218838;
    border-color: #1e7e34;
}

#add {
    margin: 1rem 0;
    background-color: #28a745;
    border-color: #28a745;
}

#add:hover {
    background-color: #218838;
    border-color: #1e7e34;
}

#pa_ads {
    margin-bottom: 3rem;
}

.adsense {
    text-align: center;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 10px;
}

.fieldset {
    padding-top: 3rem;
    padding-bottom: 3rem;
    border: 1px solid #1ebea5;
    box-shadow: 3px 3px 3px 3px #137969;
    border-radius: 0.75rem;
    margin-bottom: 5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.fieldset > p {
    text-align: center;
    margin: 1rem;
}

.row {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 1rem 0;
}

.form-group {
    padding-left: 5px;
    padding-right: 5px;
}

.form-control {
    display: block;
    width: 100%;
    padding: .75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #495057;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    border-radius: .25rem;
    transition: border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}

.form-control:focus {
    color: #495057;
    background-color: #fff;
    border-color: #80bdff;
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(0,123,255,.25);
}

.btn {
    display: block;
    font-weight: 400;
    text-align: center;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    padding: .75rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: .25rem;
    transition: color .15s ease-in-out,background-color .15s ease-in-out,border-color .15s ease-in-out,box-shadow .15s ease-in-out;
    color: #fff;
}

/* Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Firefox */
input[type=number] {
  -moz-appearance: textfield;
}