.field--sections {
    .field__tabs-nav {
        float: left;
        width: 100%;
        max-width: 200px;
        position: relative;
        z-index: 1;
    }

    .field__tabs {
        padding-left: 0;
        float: left;
        width: calc(100% - 200px);
        position: relative;
        z-index: 0;
    }

    .field__tab-btn {
        width: 100%;
        box-sizing: border-box;
        display: block;
        background: #f5f5f5;
        padding: 15px;
        border: 1px solid #ddd;

        text-align: left;

        & + .field__tab-btn {
            margin-top: -1px;
        }

        &--active {
            border-right-color: #fbfbfb;

            background: #fbfbfb;

            & + .field__tab-btn {
                box-shadow: inset 0 1px 1px #ccc;
            }
        }
    }

    .field__tab {
        padding: 20px;
        margin-left: -1px;
        border: 1px solid #ddd;
        background: #fbfbfb;

        &--hidden {
            display: none;
        }
    }
}