.timeline-outer {
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    height: 100%;
    width: 0;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    pointer-events: none;
}

.timeline-line {
    position: absolute;
    left: 0;
    top: 0;
    width: 1px;
    height: 100%;
    background-color: var(--line-color);
    background: linear-gradient(to bottom, var(--line-color) 0%, var(--line-active) 100%);
    opacity: 0.3;
}

.timeline-progress {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 0%;
    background: linear-gradient(to bottom, var(--ms-visio-accent), var(--ms-visio-light));
    box-shadow: 0 0 10px var(--ms-visio-accent);
    transition: height 0.1s linear;
}

.timeline-track {
    position: relative;
    height: 100%;
    width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding-top: 60px;
}

.timeline-point {
    position: relative;
    width: 50px;
    height: 50px;
    background-color: var(--bg-surface);
    border: 2px solid var(--line-color);
    border-radius: 50%;
    transition: all 0.3s ease;
    cursor: pointer;
    z-index: 2;
    padding: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.timeline-point img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: grayscale(100%) opacity(0.6);
    transition: filter 0.3s ease;
}

.timeline-point.active {
    transform: scale(1.2);
    background-color: rgb(0, 0, 0);
    border-color: rgb(76, 195, 255);
    box-shadow: 0 0 15px rgba(76, 194, 255, 0.4);
}

.timeline-point.active img {
    filter: grayscale(0%) opacity(1);
}