.trajectory-additions {
    margin: 25px 0 55px;
}

.trajectory-additions-list {
    list-style: none;
    margin: 0;
    padding: 0;
    position: relative;
}

.trajectory-additions-list::before {
    background: #ed3237;
    bottom: 0;
    content: '';
    left: 50%;
    opacity: .5;
    position: absolute;
    top: 0;
    width: 1px;
}

.trajectory-addition {
    display: grid;
    gap: 0 12%;
    grid-template-columns: 44% 44%;
    min-height: 175px;
    position: relative;
}

.trajectory-addition::before {
    background: #ed3237;
    border-radius: 50%;
    content: '';
    height: 10px;
    left: 50%;
    position: absolute;
    top: 42px;
    transform: translateX(-45%);
    width: 10px;
}

.trajectory-addition .mission-history-box {
    margin: 0 0 36px auto;
    width: min(100%, 400px);
}

.trajectory-addition:nth-child(even) .mission-history-box {
    grid-column: 2;
    grid-row: 1;
    margin: 0 auto 36px 0;
}

.trajectory-addition:nth-child(even) .mission-history-box::after {
    left: -11px;
    right: auto;
}

.trajectory-addition .trajectory-year {
    font-size: 36px;
    font-weight: 700;
    grid-column: 2;
    line-height: 1.2;
    margin: 32px 0 0;
}

.trajectory-addition:nth-child(even) .trajectory-year {
    grid-column: 1;
    grid-row: 1;
    text-align: right;
}

.trajectory-addition:nth-child(even) .mission-history-content h2::before {
    left: auto;
    right: -45px;
}

.trajectory-back {
    text-align: center;
}

.trajectory-back a {
    align-items: center;
    border: 1px solid #ed3237;
    border-radius: 50%;
    color: #10112f;
    display: inline-flex;
    height: 55px;
    justify-content: center;
    width: 55px;
}

@media (max-width: 767px) {
    .trajectory-additions { margin: 15px 0 35px; }
    .trajectory-additions-list { padding-left: 24px; }
    .trajectory-additions-list::before { left: 4px; }
    .trajectory-addition { display: block; min-height: 0; }
    .trajectory-addition::before { left: -19px; top: 18px; }
    .trajectory-addition .trajectory-year,
    .trajectory-addition:nth-child(even) .trajectory-year {
        display: block;
        font-size: 26px;
        margin: 0 0 12px;
        text-align: left;
    }
    .trajectory-addition .mission-history-box,
    .trajectory-addition:nth-child(even) .mission-history-box {
        margin: 0 0 30px;
        width: 100%;
    }
    .trajectory-addition .mission-history-box::after { display: none; }
}