Ghost/ghost/admin/app/styles/layouts/post-history.css

/* Modal */

.gh-post-history {
    display: flex;
    height: 100%;
}

.fullscreen-modal-post-history .modal-content {
    padding: 0;
}

/* Sidebar */

.gh-post-history .settings-menu-header.subview {
    max-width: 420px;
    padding: 3.6rem 2.4rem;
    border-bottom: 1px solid var(--whitegrey);
}

.gh-post-history .settings-menu-content {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    padding: 96px 0 0;
}

.gh-post-history .nav-list-item.active {
    background: var(--whitegrey-l2);
}

.nav-list-item .gh-post-history-version-meta {
    margin-top: 4px;
    color: var(--midgrey);
    font-size: 1.35rem;
    font-weight: 400;
}

.nav-list-item .gh-post-history-version-meta.deleted-user {
    color: var(--lightgrey-d2);
}

.nav-list-item .gh-post-history-version-tag {
    margin-left: .8rem;
    padding: 0 5px;
    font-size: 1.1rem;
    font-weight: 600;
    line-height: inherit;
    text-transform: uppercase;
    letter-spacing: .2px;
    border-radius: var(--border-radius);
}

.nav-list-item .gh-post-history-version-tag.current {
    background: var(--lightgrey-l2);
    color: var(--darkgrey);
}

.nav-list-item .gh-post-history-version-tag.published {
    background: var(--green-d1);
    color: var(--white);
}

.nav-list-item .gh-post-history-version-restore {
    position: absolute;
    top: 20px;
    right: 24px;
    width: inherit;
    padding: 0;
}

.nav-list-item .gh-post-history-version-restore span {
    color: var(--midgrey);
    font-size: 1.35rem;
    font-weight: 500;
}

.gh-post-history-footer {
    position: sticky;
    -webkit-position: sticky;
    bottom: -24px;
    z-index: 9997;
    height: 104px;
    -webkit-backface-visibility: hidden;
}

.gh-post-history-footer::before,
.gh-post-history-footer::after {
  content: "";
  position: sticky;
  -webkit-position: sticky;
  display: block;
  height: 24px;
}

.gh-post-history-footer::before {
    z-index: 9998;
    bottom: 0;
    background: var(--white);
}

.gh-post-history-footer::after {
    bottom: 64px;
    box-shadow: 0 0 0 1px rgba(0,0,0,.04), 0 -8px 16px -3px rgba(0,0,0,.15);
}

.gh-post-history-footer .gh-toggle-featured {
    position: relative;
    width: 34px;
    height: 20px;
}

.gh-post-history-footer-inner {
    position: sticky;
    -webkit-position: sticky;
    bottom: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    height: 80px;
    margin-bottom: -24px;
    padding: var(--main-layout-area-padding);
    background: var(--white);
}

.gh-post-history-footer .for-switch.x-small {
    width: 100%;
}

.gh-post-history-footer-inner .switch {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 0;
    margin-bottom: 0;
    font-weight: 500;
}

.gh-post-history-footer .for-switch.x-small label {
    width: inherit !important;
    height: inherit !important;
}

/* Main content */

.gh-post-history-main {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: auto;
}

.gh-post-history .gh-editor-title {
    height: initial;
    max-width: 740px;
    margin-left: auto;
    margin-right: auto;
    color: var(--black);
}

.gh-post-history .show-diff .gh-editor-feature-image img {
    opacity: .5;
}

.gh-post-history .show-diff .gh-editor-feature-image del img {
    opacity: 1;
    border: 3px solid var(--white);
    box-shadow: 0 0 0 2px var(--red);
}

.gh-post-history .show-diff .gh-editor-feature-image ins img {
    opacity: 1;
    border: 3px solid var(--white);
    box-shadow: 0 0 0 2px var(--green);
}

.gh-post-history .show-diff .gh-editor-title {
    opacity: .4;
}

.gh-post-history-main .show-diff .koenig-lexical h1,
.gh-post-history-main .show-diff .koenig-lexical h2,
.gh-post-history-main .show-diff .koenig-lexical h3,
.gh-post-history-main .show-diff .koenig-lexical h4,
.gh-post-history-main .show-diff .koenig-lexical h5,
.gh-post-history-main .show-diff .koenig-lexical h6,
.gh-post-history-main .show-diff .koenig-lexical p,
.gh-post-history-main .show-diff .koenig-lexical blockquote,
.gh-post-history-main .show-diff .koenig-lexical aside {
    color: rgba(21, 23, 26, 0.4);
}

.gh-post-history-main .show-diff .koenig-lexical a:not(.gh-post-history-main .koenig-lexical del a):not(.gh-post-history-main .koenig-lexical ins a) {
    opacity: .4;
}

.gh-post-history-main .koenig-lexical del {
    color: var(--red-d1) !important;
}

.gh-post-history-main .koenig-lexical ins {
    color: var(--black) !important;
    text-decoration: none !important;
    background-color: rgba(48, 207, 67, 0.15) !important;
}

.gh-post-history-hidden-lexical {
    display: none;
}