body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    height: 100%;
    background-color: #f2f2f2;
    display: flex;
    min-height: 100vh;
    flex-direction: column;
}

.content {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    flex: 1 0 auto;
}

.card-detail {
    display: flex;
    flex-flow: column;
    margin: 32px 15px 2em 15px;
    max-width: 600px;
    width: 500px;
    border-radius: 10px;
    background: #fff;
    box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.2);
}

.card-detail .content-card {
    margin: 2em;
}

.card-detail h1 {
    line-height: 1em;
    margin: 0 0 24px;
    text-align: center;
    font-family: 'Lato', sans-serif;
    font-size: 24pt;
    color: #393e46;
}

.form-range {
    display: flex;
    flex-direction: column;
    margin: 0 0 20px 0;
}

.form-range input {
    width: 100%;
    padding: 12px 20px;
    margin: 8px 0;
    font-size: 12pt;
    display: inline-block;
    border: 1px solid #9e9e9e;
    outline: none;
    border-radius: 5px;
    box-sizing: border-box;
    color: #424242;
}

.form-range input:focus {
    border: 2px solid #ff9800;
}

.label-input {
    font-weight: 500;
    font-size: 12pt;
    color: #686d76;
}

.button-container {
    display: flex;
    justify-content: flex-end;
}

.action-button {
    background: #33ca7f;
    color: #fff;
    padding: 13px 24px 13px 24px;
    margin: 10px 0 10px 0;
    border-radius: 8px;
    font-weight: 600;
    font-size: 11pt;
    display: inline-block;
    border: none;
}

.action-button:hover {
    background: #4bd28f;
}

hr {
    border: 1px solid #ccc;
}

/* https://css-tricks.com/couple-takes-sticky-footer/ */
.footer {
    flex-shrink: 0;
    background-color: #21bf73;
    text-align: center;
}

.footer h3 {
    color: #fff;
    line-height: 10px;
    font-size: 12pt;
    cursor: pointer;
}

/* ======================================================
   BUTTON LOADING ANIMATION
====================================================== */
.action-button.loading {
    pointer-events: none;
    opacity: 0.75;
    position: relative;
    padding-right: 52px;
}

.action-button.loading::after {
    content: '';
    width: 18px;
    height: 18px;
    border: 3px solid rgba(255, 255, 255, 0.6);
    border-top: 3px solid #ffffff;
    border-radius: 50%;
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    animation: button-spin 0.8s linear infinite;
}

@keyframes button-spin {
    from {
        transform: translateY(-50%) rotate(0deg);
    }

    to {
        transform: translateY(-50%) rotate(360deg);
    }
}