.release-history-page {
    background: #f4f8f9;
    min-height: 70vh;
}

.release-history-hero {
    align-items: end;
    background: #082d37;
    color: #ffffff;
    display: grid;
    gap: 36px;
    grid-template-columns: minmax(0, 1fr) auto;
    padding: clamp(54px, 8vw, 96px) max(20px, calc((100vw - 1180px) / 2));
}

.release-history-hero > div:first-child {
    max-width: 780px;
}

.release-history-hero .eyebrow {
    color: #80e4ef;
}

.release-history-hero h1 {
    color: #ffffff;
    font-size: clamp(42px, 6vw, 72px);
    line-height: 1;
    margin: 0 0 18px;
}

.release-history-hero .lead {
    color: #d8f8fc;
    margin: 0;
}

.current-release {
    border-left: 3px solid #36c2d1;
    display: grid;
    gap: 6px;
    min-width: 250px;
    padding: 8px 0 8px 20px;
}

.current-release span,
.current-release time {
    color: #b9dce2;
    font-size: 14px;
}

.current-release strong {
    font-size: 19px;
}

.release-history-content {
    align-items: start;
    display: grid;
    gap: 42px;
    grid-template-columns: 250px minmax(0, 1fr);
    margin: 0 auto;
    max-width: 1180px;
    padding: 46px 20px 80px;
}

.release-history-index {
    background: #ffffff;
    border: 1px solid #d7e5ea;
    border-radius: 8px;
    padding: 18px;
    position: sticky;
    top: 88px;
}

.release-history-index > strong {
    color: #075061;
    display: block;
    margin-bottom: 12px;
}

.release-history-index nav {
    display: grid;
    gap: 3px;
    max-height: calc(100vh - 180px);
    overflow: auto;
}

.release-history-index a {
    border-left: 2px solid #d7e5ea;
    color: #40545b;
    font-size: 14px;
    padding: 7px 9px;
    text-decoration: none;
}

.release-history-index a:hover,
.release-history-index a:focus-visible {
    border-color: #15a2b8;
    color: #075061;
}

.release-history-main {
    min-width: 0;
}

.release-history-note {
    background: #e9f6f8;
    border-left: 4px solid #15a2b8;
    margin-bottom: 28px;
    padding: 15px 18px;
}

.release-history-note p {
    margin: 0;
}

.release-timeline {
    display: grid;
    gap: 18px;
}

.release-entry {
    background: #ffffff;
    border: 1px solid #d7e5ea;
    border-radius: 8px;
    padding: clamp(20px, 4vw, 30px);
    scroll-margin-top: 100px;
}

.release-entry.is-current {
    border-color: #15a2b8;
    box-shadow: inset 4px 0 0 #15a2b8;
}

.release-entry header {
    align-items: start;
    display: flex;
    gap: 20px;
    justify-content: space-between;
    margin-bottom: 18px;
}

.release-entry h2 {
    color: #075061;
    font-size: clamp(22px, 3vw, 30px);
    margin: 5px 0 0;
    overflow-wrap: anywhere;
}

.release-entry h3 {
    font-size: 20px;
    margin: 0 0 8px;
}

.release-entry p {
    color: #53666d;
}

.release-entry ul {
    display: grid;
    gap: 8px;
    margin: 18px 0 0;
    padding-left: 20px;
}

.release-entry li {
    padding-left: 4px;
}

.release-entry time,
.release-period {
    color: #667b83;
    flex: 0 0 auto;
    font-size: 14px;
    padding-top: 3px;
}

.release-label {
    color: #087486;
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
}

@media (max-width: 820px) {
    .release-history-hero,
    .release-history-content {
        grid-template-columns: 1fr;
    }

    .current-release {
        min-width: 0;
    }

    .release-history-index {
        position: static;
    }

    .release-history-index nav {
        display: flex;
        flex-wrap: wrap;
        max-height: none;
    }

    .release-history-index a {
        border: 1px solid #d7e5ea;
        border-radius: 6px;
    }
}

@media (max-width: 520px) {
    .release-history-hero {
        padding-top: 44px;
    }

    .release-entry header {
        display: grid;
        gap: 8px;
    }
}