h1 {
    /* color: var(--opt-color); */
    color: #5c8eb0;
    margin-bottom: 0;
    /* text-align: center; */
    /* text-transform: uppercase; */
    font-family: "Open Sans", sans-serif;
    font-size: 55px;
}

.hr-title {
    border: none;
    height: 2px;
    background-color: var(--opt-color);
    opacity: 1;
    margin-top: 0;
}

.section-title {
    padding-bottom: 10px !important;
}

.table-of-contents {
    display: inline-grid;
    margin-bottom: 40px;
}

.table-of-contents .group {
    font-weight: 700;
}

.table-of-contents a {
    margin-left: 2em;
    color: var(--color-vpt-dark-blue);
    font-size: 16px;
}

.table-of-contents a,
.table-of-contents span {
    padding-left: 20px;
}

.table-of-contents i {
    margin-right: 10px;
}

.airport-stats {
    margin: 20px 0;
}

.airport-stats-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(197, 225, 245, 0.7);
    margin: 10px;
    padding: 10px;
}

.airport-stats-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-vpt-dark-blue);
}

.airport-stats-label {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-vpt-dark-blue);
}

.airport-stats-updated {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-vpt-dark-blue);
}

.section-description p {
    text-align: justify;
    text-indent: 20px;
}

.section-description .theory {
    text-indent: 0;
    font-style: italic;
    color: var(--color-vpt-lightblue);
}

.section-description .img-right {
    float: right;
    margin: 0 0 0.8em 0.8em;
    max-width: 40%;
}

.section-description h4 {
    margin-top: 1.5em;
}

.card-title {
    font-weight: 700;
    text-align: center;
}

.card-text {
    text-indent: 0 !important;
    text-align: left !important;
    font-size: 14px;
    line-height: 1;
}

.formula {
    font-size: 18px;
    font-family: 'Cambria', 'Times New Roman', serif;
    margin-bottom: 10px;
}

.formula p {
    text-align: center;
}


/**
* Stats
*/

.s-stats {
    padding-top: 4.2rem;
    padding-bottom: 4.2rem;
    background-color: #050505;
    background-image: url(../images/stats-bg.jpg);
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    overflow: hidden;
    position: relative;
}

.stats {
    text-align: center;
}

.img-border-container {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.img-border {
    background: #fff;
    border: 1px solid var(--opt-color-dark-blue);
    ;
    box-shadow: 0px 0px 15px rgba(0, 0, 0, 0.30);
}

.img-border-container .description {
    display: block;
    text-align: center;
    font-size: 16px;
    font-style: italic;
    color: var(--opt-color-dark-blue);
    margin-top: 5px;
}

.highlight {
    color: var(--opt-color);
    font-weight: 700;
}

.section-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 100px;
}