.event-abstract-chevron {
    color: var(--dark-blue);
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

details[open] .event-abstract-chevron {
  transform: rotate(180deg);
}

.callout-header {
    display: flex;
    align-items: center;  
    justify-content: space-between;
    width: 100%;
    cursor: pointer;
}