.challenge-body {
    min-width: 0;
    background: #eef1f4;
    color: #172026;
    font-family: Arial, Helvetica, sans-serif;
}

.challenge-body #top {
    width: min(810px, calc(100% - 24px));
    margin: 12px auto;
    box-sizing: border-box;
}

.challenge-body #header,
.challenge-body #menu,
.challenge-body #contents,
.challenge-body #footer {
    width: 100%;
    box-sizing: border-box;
}

.challenge-body #header table {
    width: 100%;
}

.challenge-body #header th {
    font-size: 0;
}

.challenge-body #header p {
    font-size: 15px;
}

.challenge-body #icatch {
    display: flex;
    overflow: hidden;
}

.challenge-body #icatch > img {
    width: 33.333%;
    height: auto;
    object-fit: cover;
}

.challenge-contents {
    line-height: 1.55;
}

.challenge-intro {
    margin-top: 18px;
    padding: 34px 36px;
    background: #f1f6f7;
    border-top: 5px solid #8ed600;
    border-bottom: 1px solid #d7e1e4;
    color: #172026;
}

.challenge-kicker {
    margin: 0 0 8px;
    color: #007a9a;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
}

.challenge-intro h1 {
    max-width: 680px;
    margin: 0;
    color: #172026;
    font-size: 36px;
    line-height: 1.12;
}

.challenge-lede {
    max-width: 670px;
    margin: 14px 0 0;
    color: #33454f;
    font-size: 17px;
}

.challenge-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.challenge-button {
    display: inline-block;
    padding: 10px 15px;
    border: 1px solid #8ed600;
    border-radius: 4px;
    background: #8ed600;
    color: #101719;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
}

.challenge-button.secondary {
    border-color: #007a9a;
    background: #fff;
    color: #006b87;
}

.challenge-button:hover {
    border-bottom: 1px solid #0066a1;
    background: #e5f2f5;
    color: #101719;
}

.challenge-facts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-bottom: 1px solid #d7dde1;
    background: #f7f9fa;
}

.challenge-fact {
    padding: 17px 20px;
    border-right: 1px solid #d7dde1;
}

.challenge-fact:last-child {
    border-right: 0;
}

.challenge-fact strong,
.challenge-fact span {
    display: block;
}

.challenge-fact strong {
    color: #0066a1;
    font-size: 20px;
}

.challenge-fact span {
    margin-top: 2px;
    color: #52616b;
    font-size: 13px;
}

.challenge-section {
    padding: 34px 28px;
}

.challenge-section + .challenge-section {
    border-top: 1px solid #e1e5e8;
}

.challenge-section h2 {
    margin: 0 0 12px;
    color: #172026;
    font-size: 25px;
    line-height: 1.2;
}

.challenge-section h3 {
    margin: 0 0 8px;
    color: #172026;
    font-size: 18px;
}

.challenge-section p {
    margin: 0 0 14px;
}

.challenge-section ul {
    margin: 10px 0 0;
    padding-left: 20px;
}

.challenge-section li {
    margin: 0 0 7px;
}

.challenge-tracks {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 18px;
}

.challenge-track {
    padding: 20px;
    border: 1px solid #d6dde1;
    border-top: 4px solid #8ed600;
    border-radius: 6px;
    background: #fff;
}

.challenge-track.hardware {
    border-top-color: #00a9c4;
}

.challenge-columns {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
}

.challenge-highlight {
    background: #f3f8ea;
}

.challenge-registration {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 190px;
    gap: 30px;
    align-items: center;
}

.challenge-registration-date {
    margin: 10px 0 16px;
    color: #0066a1;
    font-size: 22px;
    font-weight: 700;
}

.challenge-qr {
    text-align: center;
}

.challenge-qr img {
    display: block;
    width: 170px;
    height: 170px;
    margin: 0 auto 8px;
}

.challenge-qr a {
    font-weight: 700;
}

.challenge-flyer {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 28px;
    align-items: center;
}

.challenge-flyer img {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid #b9c1c6;
}

.challenge-flyer a:hover img {
    opacity: .88;
}

.challenge-note {
    color: #52616b;
    font-size: 13px;
}

@media (max-width: 700px) {
    .challenge-body #top {
        width: calc(100% - 12px);
        margin: 6px auto;
        padding: 6px;
    }

    .challenge-body #header p {
        line-height: 1.4;
    }

    .challenge-intro {
        padding: 26px 20px;
    }

    .challenge-intro h1 {
        font-size: 29px;
    }

    .challenge-facts,
    .challenge-tracks,
    .challenge-columns,
    .challenge-registration,
    .challenge-flyer {
        grid-template-columns: 1fr;
    }

    .challenge-fact {
        border-right: 0;
        border-bottom: 1px solid #d7dde1;
    }

    .challenge-section {
        padding: 28px 18px;
    }

    .challenge-flyer img {
        max-width: 280px;
    }
}