.panel {
    padding: 30px 20px;
    background-color: #fff;
    box-shadow: 0px 0px 15px 0px #00000024;
    border-radius: 20px;
}

.panel::after {
    content: '';
    display: block; 
    clear: both;
}

.panel__heading {
    font-size: 19px;
    margin-bottom: 5px;
    border-bottom: 2px solid #ccc;
    padding-bottom: 5px;
}

@media (min-width: 768px) {
    .panel {
        padding: 50px 20px;
    }
}

@media (min-width: 1200px) {
    .panel {
        padding: 70px 40px;
    }

    .panel--2columns {
        display: flex;
        gap: 40px;
    }

}

@media (min-width: 1600px) {
    .panel {
        padding: 90px 60px;
    }
}