.o_signal_timeline .st-timeline {
    position: relative;
    padding-left: 48px;
}
.o_signal_timeline .st-timeline::before {
    content: "";
    position: absolute;
    left: 19px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #dee2e6;
}
.o_signal_timeline .st-timeline-item {
    position: relative;
    margin-bottom: 1rem;
}
.o_signal_timeline .st-timeline-marker {
    position: absolute;
    left: -48px;
    top: 8px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 0.85rem;
    z-index: 1;
    border: 3px solid #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.o_signal_timeline .st-timeline-content {
    padding-left: 4px;
}
.o_signal_timeline .st-timeline-content .card {
    border-radius: 0.5rem;
    transition: box-shadow 0.15s;
}
.o_signal_timeline .st-timeline-content .card:hover {
    box-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.08) !important;
}
.o_signal_timeline .st-student-card {
    transition: transform 0.15s, box-shadow 0.15s;
    cursor: pointer;
}
.o_signal_timeline .st-student-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1) !important;
}
.o_signal_timeline .cursor-pointer {
    cursor: pointer;
}
