/* --- timeline.css --- Timeline interactive de la section "Révision" --- */

.timeline-container {
    max-width: 700px;
    text-align: left;
}

.timeline-intro {
    font-size: 0.95rem;
    color: var(--color-text);
    opacity: 0.8;
    margin-top: -1rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.timeline {
    position: relative;
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0.5rem;
    top: 0.4rem;
    bottom: 0.4rem;
    width: 3px;
    background: linear-gradient(to bottom, var(--color-pink), var(--color-purple));
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 1.1rem;
    opacity: 0;
    transform: translateX(-12px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.timeline-item.in-view {
    opacity: 1;
    transform: translateX(0);
}

.timeline-dot {
    position: absolute;
    left: -1.95rem;
    top: 0.35rem;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: linear-gradient(to right, var(--color-pink), var(--color-purple));
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.08);
}

.timeline-card {
    display: block;
    width: 100%;
    text-align: left;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.75rem;
    padding: 0.85rem 1.1rem;
    cursor: pointer;
    color: var(--color-light);
    font-family: inherit;
    transition: background 0.2s ease;
}

.timeline-card:hover {
    background: rgba(255, 255, 255, 0.09);
}

.timeline-date {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-pink);
    font-weight: 700;
}

.timeline-toggle-icon {
    float: right;
    opacity: 0.7;
    transition: transform 0.3s ease;
}

.timeline-card[aria-expanded="true"] .timeline-toggle-icon {
    transform: rotate(180deg);
}

.timeline-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0.25rem 0 0 0;
}

.timeline-desc {
    font-size: 0.9rem;
    color: var(--color-text);
    opacity: 0.85;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, margin-top 0.35s ease;
}

.timeline-card[aria-expanded="true"] .timeline-desc {
    max-height: 200px;
    margin-top: 0.5rem;
}

@media (max-width: 768px) {
    .timeline {
        padding-left: 1.5rem;
    }
    .timeline-dot {
        left: -1.45rem;
        width: 12px;
        height: 12px;
    }
}