html-test/scss/style.scss

#tracking {
    .table {
        display: grid;
        grid-template-columns: 2rem repeat(4, auto);
        align-items: center;

        .row {
            display: contents;

            &:hover div {
                cursor: pointer;
            }

            &:not(.open):hover div {
                background: whitesmoke;
            }

            &.open {
                .open-button::after {
                    // content: "\25BC";
                    content: "\02796";
                }
            }

            .open-button {
                &::after {
                    // content: "\25B6";
                    content: "\02795";
                    font-size: 13px;
                    color: #000;
                    float: right;
                    margin-right: 0.35rem;
                }
            }
        }

        div {
            position: relative;
            display: flex;
            align-items: center;
            padding: 0.5rem 0;

            &.header {
                font-weight: bold;

                border-bottom-width: 1px;
                border-bottom-style: solid;
                border-bottom-color: #0000001f;
            }
        }

        .hidden {
            display: none;
        }

        .details {
            grid-column: 1 / 6;
            box-sizing: border-box;

            // padding: 0 18px;
            // padding: 0.4rem 0;
            padding: 0;
            background-color: white;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.2s ease-out;

            border-bottom-width: 1px;
            border-bottom-style: solid;
            border-bottom-color: #0000001f;

            div {
                padding: 2rem;
            }
        }
    }

    .page-navigation {
        display: flex;
        margin-top: 3rem;
        justify-content: flex-end;
        align-items: center;

        .pagination {
            margin-right: 2rem;

            div {
                color: black;
                float: left;
                padding: 8px 16px;
                text-decoration: none;
                transition: background-color 0.3s;

                &:hover {
                    cursor: pointer;

                    &:not(.active) {
                        background-color: #ddd;
                    }
                }

                &.active {
                    background-color: #4caf50;
                    color: white;
                }
            }
        }
    }
}