.timeline-page {
    padding-top: 4rem;
}

/* ---- Frise verticale : une ligne centrale qui se remplit au scroll ---- */
.timeline {
    --tl-progress: 100%;
    position: relative;
    list-style: none;
    margin: 2.5rem 0 0;
    padding: 0;
}

.timeline::before,
.timeline::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    width: 3px;
    transform: translateX(-50%);
    border-radius: 3px;
}

.timeline::before {
    bottom: 0;
    background: var(--line);
}

.timeline::after {
    height: var(--tl-progress);
    background: linear-gradient(to bottom, #ffa135, #f1d9c8);
    box-shadow: 0 0 18px rgba(255, 161, 53, 0.45);
    transition: height 120ms linear;
}

.tl-item {
    position: relative;
    width: 50%;
    padding: 0 2.8rem 2.2rem 0;
}

.tl-right {
    margin-left: auto;
    padding: 0 0 2.2rem 2.8rem;
}

.tl-dot {
    position: absolute;
    top: 1.5rem;
    right: -0.55rem;
    width: 1.1rem;
    height: 1.1rem;
    border-radius: 50%;
    background: #000;
    border: 3px solid #ffa135;
    z-index: 1;
}

.tl-right .tl-dot {
    right: auto;
    left: -0.55rem;
}

.tl-card {
    padding: 1.1rem 1.3rem 1.2rem;
    border-radius: 0.9rem;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.03);
}

.tl-year {
    margin: 0 0 0.6rem;
    font-size: clamp(2.4rem, 4vw, 3.4rem);
    line-height: 1;
    color: #ffa135;
    letter-spacing: -0.02em;
}

.tl-events {
    display: grid;
    gap: 0.9rem;
}

.tl-event {
    padding-top: 0.9rem;
    border-top: 1px solid var(--line);
}

.tl-event:first-child {
    padding-top: 0;
    border-top: 0;
}

.tl-kind {
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
}

.tl-event h3 {
    margin: 0.2rem 0 0.3rem;
    font-size: 1.45rem;
}

.tl-event p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.tl-link {
    display: inline-block;
    margin-top: 0.5rem;
    font-weight: 700;
    font-size: 0.9rem;
    color: #ffa135;
}

.tl-link:hover {
    text-decoration: underline;
}

/* Années sans projet : simple repère centré sur la frise (2014 – 2019) */
.tl-item.tl-empty {
    width: 100%;
    margin: 0;
    padding: 0 0 0.7rem;
    display: flex;
    justify-content: center;
}

.tl-empty .tl-dot {
    display: none;
}

.tl-empty .tl-card {
    position: relative;
    z-index: 1;
    padding: 0.3rem 1.1rem;
    background: #000;
    border: 1px dashed rgba(255, 255, 255, 0.22);
    border-radius: 999px;
}

.tl-empty .tl-year {
    margin: 0;
    font-size: 1.4rem;
    color: var(--muted);
}

/* ---- Animation simple : les étapes glissent vers la ligne, le point « pulse » ---- */
.reveal-ready .tl-item {
    opacity: 0;
}

.reveal-ready .tl-item.is-visible {
    opacity: 1;
    animation: tl-slide-left 650ms cubic-bezier(0.22, 0.8, 0.28, 1) backwards;
}

.reveal-ready .tl-right.is-visible {
    animation-name: tl-slide-right;
}

.reveal-ready .tl-item.is-visible .tl-dot {
    animation: tl-pop 700ms ease backwards;
}

@keyframes tl-slide-left {
    from { opacity: 0; transform: translateX(-36px); }
    to   { opacity: 1; transform: none; }
}

@keyframes tl-slide-right {
    from { opacity: 0; transform: translateX(36px); }
    to   { opacity: 1; transform: none; }
}

@keyframes tl-pop {
    0%   { transform: scale(0); box-shadow: 0 0 0 0 rgba(255, 161, 53, 0.7); }
    60%  { transform: scale(1.35); }
    100% { transform: scale(1); box-shadow: 0 0 0 12px rgba(255, 161, 53, 0); }
}

@media (max-width: 760px) {
    .tl-item.tl-empty {
        justify-content: flex-start;
        padding-left: 2.4rem;
    }

    .tl-empty .tl-card {
        background: none;
    }

    .timeline::before,
    .timeline::after {
        left: 0.55rem;
    }

    .tl-item,
    .tl-right {
        width: 100%;
        margin-left: 0;
        padding: 0 0 1.8rem 2.4rem;
    }

    .tl-dot,
    .tl-right .tl-dot {
        left: 0;
        right: auto;
    }

    .reveal-ready .tl-right.is-visible {
        animation-name: tl-slide-left;
    }
}

/* Petite image d'un événement de la frise */
.tl-thumb {
    display: block;
    width: 100%;
    max-width: 14rem;
    aspect-ratio: 16 / 10;
    margin-top: 0.7rem;
    object-fit: cover;
    border-radius: 0.5rem;
    border: 1px solid var(--line);
    background: #0b0b0d;
    image-rendering: pixelated;
}