.research-timeline-page {
    min-height: 100vh;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
}

.research-timeline-shell {
    width: min(920px, calc(100% - 32px));
    margin: 0 auto;
    padding: 56px 0 72px;
}

.research-timeline-header {
    margin-bottom: 40px;
    text-align: center;
}

.research-timeline-header h1 {
    margin: 0;
    font-size: var(--font-size-6xl);
    line-height: 1.15;
    color: var(--color-text-primary);
}

.research-timeline {
    position: relative;
    display: grid;
    gap: 0;
}

.research-timeline::before {
    content: '';
    position: absolute;
    top: 10px;
    bottom: 10px;
    left: 190px;
    width: 3px;
    background: linear-gradient(to bottom, var(--color-primary-blue-light), var(--color-primary-blue));
    border-radius: 999px;
}

.research-timeline-item {
    position: relative;
    display: grid;
    grid-template-columns: 160px 60px minmax(0, 1fr);
    gap: 0;
    align-items: start;
    padding-bottom: 28px;
}

.research-timeline-item:last-child {
    padding-bottom: 0;
}

.research-timeline-date {
    padding-top: 10px;
    color: var(--color-purple);
    font-size: var(--font-size-body);
    font-weight: 700;
    line-height: 1.4;
    text-align: right;
}

.research-timeline-marker {
    position: relative;
    width: 18px;
    height: 18px;
    margin: 12px auto 0;
    border: 4px solid var(--color-border-white);
    border-radius: var(--radius-circle);
    background-color: var(--color-purple);
    box-shadow: 0 0 0 3px var(--color-border-pale);
    z-index: 1;
}

.research-timeline-content {
    padding: 20px 22px;
    border: var(--border-width-thin) solid rgba(46, 130, 167, 0.12);
    border-radius: var(--radius-md);
    background-color: var(--color-bg-white);
    box-shadow: 0 4px 16px var(--shadow-color-blue-light);
}

.research-timeline-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
}

.research-timeline-content h2 {
    margin: 0;
    font-size: var(--font-size-card-title);
    line-height: 1.35;
    color: var(--color-text-primary);
}

.research-timeline-status {
    flex: 0 0 auto;
    max-width: 180px;
    padding: 5px 9px;
    border-radius: var(--radius-sm);
    background-color: var(--color-bg-coral-tint);
    color: var(--color-coral);
    font-size: var(--font-size-xs);
    font-weight: 700;
    line-height: 1.3;
    text-align: center;
}

.research-timeline-content p,
.research-timeline-empty {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: var(--font-size-body);
    line-height: 1.7;
}

.research-timeline-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.research-timeline-link {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 6px 10px;
    border: var(--border-width-thin) solid rgba(46, 130, 167, 0.22);
    border-radius: var(--radius-sm);
    color: var(--color-primary-blue);
    font-size: var(--font-size-sm);
    font-weight: 700;
    line-height: 1.3;
    text-decoration: none;
}

.research-timeline-link:hover {
    background-color: var(--color-bg-hover);
}

.research-timeline-attribution {
    margin-top: 16px;
    padding: 14px;
    border-radius: var(--radius-md);
    background-color: var(--color-bg-hover);
}

.research-timeline-attribution-label {
    margin-bottom: 8px;
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    font-weight: 700;
}

.research-timeline-attribution-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.research-timeline-attribution-item {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 6px;
    max-width: 100%;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    background-color: var(--color-bg-white);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.4;
}

.research-timeline-attribution-name {
    color: var(--color-text-primary);
    font-weight: 600;
}

.research-timeline-attribution-help {
    color: var(--color-text-muted);
}

@media only screen and (max-width: 720px) {
    .research-timeline-shell {
        width: min(100% - 28px, 620px);
        padding: 36px 0 56px;
    }

    .research-timeline-header {
        margin-bottom: 28px;
        text-align: left;
    }

    .research-timeline-header h1 {
        font-size: var(--font-size-5xl);
    }

    .research-timeline::before {
        left: 8px;
        top: 8px;
        bottom: 8px;
        width: 3px;
    }

    .research-timeline-item {
        display: grid;
        grid-template-columns: 24px minmax(0, 1fr);
        grid-template-areas:
            "marker date"
            "marker content";
        column-gap: 14px;
        padding-bottom: 24px;
    }

    .research-timeline-date {
        grid-area: date;
        padding-top: 0;
        padding-bottom: 8px;
        text-align: left;
        font-size: var(--font-size-sm);
    }

    .research-timeline-marker {
        grid-area: marker;
        width: 16px;
        height: 16px;
        margin: 3px auto 0;
        border-width: 3px;
        box-shadow: 0 0 0 2px var(--color-border-pale);
    }

    .research-timeline-content {
        grid-area: content;
        padding: 16px;
        border-radius: var(--radius-md);
    }

    .research-timeline-content h2 {
        font-size: var(--font-size-xl);
    }

    .research-timeline-heading {
        display: grid;
        gap: 8px;
    }

    .research-timeline-status {
        max-width: 100%;
        justify-self: start;
    }

    .research-timeline-attribution-list,
    .research-timeline-attribution-item {
        display: grid;
    }
}