html, body {
    height: 100vh;
    margin: 0;
    padding: 0;
}

body {
    display: grid;
    grid-template-rows: auto 1fr;
    grid-template-columns: minmax(200px, 0.17fr) 1fr;
    grid-gap: 0;

    &.hidden-aside {
        grid-template-columns: 0 auto;

        aside {
            transform: translateX(-100%);
            opacity: 0;
        }
    }

    aside {
        position: relative;
        height: inherit;
        background-color: #f9f9f9;
        border-right: 1px solid #ddd;
        overflow-y: auto;
        transition: transform 0.3s ease, opacity 0.3s ease;
        transform: translateX(0);
        display: flex;
        -ms-flex-direction: inherit;
        -webkit-flex-direction: inherit;
        flex-direction: column;

        > ul.nav {
            flex-grow: 1;

            > li.nav-item {
                &:first-of-type {
                    > a {
                        border-bottom: 1px solid #ddd;
                    }
                }

                &:not(:first-of-type) {
                    border-bottom: 1px solid #ddd;

                    > a:not(.collapsed) {
                        background-color: #f1f1f1;
                    }
                }

                > ul {
                    padding: 0.625rem 0.625rem 0.625rem 0;
                    border-top: 1px solid #ddd;
                }

                a {
                    display: block;
                    padding: 0.438rem 0.781rem;
                    color: #333;
                    text-decoration: none;
                    cursor: pointer;

                    &:hover {
                        background-color: #f0f0f0;
                    }

                    &.active {
                        background-color: #e9e9e9;
                        outline: 1px solid #ddd;
                    }
                }
            }
        }

        footer {
            padding: 0.781rem;
            text-align: center;
            border-top: 1px solid #ddd;

            a {
                color: #333;
                text-decoration: none;

                &:hover {
                    color: blue;
                    text-decoration: underline;
                }
            }
        }
    }

    main {
        background-color: #ffffff;
        height: inherit;
        overflow-y: auto;

        > header {
            border-bottom: 1px solid #ddd;
            padding: 0.313rem 0.781rem;

            .logo {
                img {
                    position: relative;
                    top: -2px;
                }
            }
        }

        > div.container-fluid {
            padding: 0.781rem;
        }
    }
}

@media (max-width: 768px) {

}