/* ==========================================================================
   histoire.css — Frise chronologique + carrousel synchronisé
   Réutilise la palette du site (navy / rouge / amber) si elle est déjà
   définie en variables CSS globales ; sinon retombe sur ces teintes.
   ========================================================================== */

.histoire-frise,
.histoire-carrousel {
    --c-navy: var(--navy, #0b1220);
    --c-navy-2: var(--navy-light, #131c30);
    --c-red: var(--red, #d13b3b);
    --c-amber: var(--amber, #e8a33d);
    --c-white: var(--white, #f4f4f1);
    --c-grey: #8992a6;
    --f-display: var(--font-display, 'Oswald', sans-serif);
    --f-body: var(--font-body, 'Inter', sans-serif);
    --f-mono: var(--font-mono, 'JetBrains Mono', monospace);

    /* Espacement du slide : X = vertical (au-dessus de la date),
       Y = horizontal (entre la nav < > et le contenu/la photo) */
    --slide-espace-x: 1rem;
    --slide-espace-y: 2vw;
}

/* ---------- Frise chronologique ---------- */

.histoire-frise {
    width: 100%;
    max-width: none;
    padding: 1.5rem 4vw 2rem;
    box-sizing: border-box;
    background: var(--c-navy);
    overflow: hidden;
}

.frise-track {
    position: relative;
    width: 100%;
    height: 60px;/*110*/
}

.frise-ligne {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    height: 50px;
    overflow: visible;
}

.frise-ligne-trait {
    stroke: var(--c-grey);
    stroke-width: 3;
}

.frise-fleche {
    fill: var(--c-amber);
    filter: drop-shadow(0 0 3px rgba(232, 163, 61, 0.45));
}

.frise-fleche-point {
    fill: var(--c-red);
    filter: drop-shadow(0 0 3px rgba(209, 59, 59, 0.6));
    animation: frise-fleche-pulse 2.4s ease-in-out infinite;
    transform-origin: center;
    transform-box: fill-box;
}

@keyframes frise-fleche-pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.75; transform: scale(1.12); }
}

@media (prefers-reduced-motion: reduce) {
    .frise-fleche-point {
        animation: none;
    }
}

.frise-point {
    position: absolute;
    top: 50%;
    height: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translate(-50%, -50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    font-family: var(--f-mono);
    color: var(--c-grey);
}

.frise-point-marker {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--c-navy-2);
    border: 2px solid var(--c-grey);
    transition: all 0.25s ease;
}

.frise-point-label {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    padding: 0.4rem 0.6rem;
    transition: color 0.25s ease, font-weight 0.25s ease;
}

/* Alternance haut / bas des dates le long de la frise */
.frise-point-haut .frise-point-label {
    bottom: 15px;
}

.frise-point-bas .frise-point-label {
    top: 15px;
}

.frise-point:hover .frise-point-marker {
    border-color: var(--c-amber);
}

.frise-point:hover .frise-point-label {
    color: var(--c-white);
}

.frise-point.is-active .frise-point-marker {
    background: var(--c-red);
    border-color: var(--c-amber);
    box-shadow: 0 0 0 4px rgba(232, 163, 61, 0.2);
    transform: scale(1.15);
}

.frise-point.is-active .frise-point-label {
    color: var(--c-amber);
    font-weight: 600;
}

.frise-point:focus-visible {
    outline: 2px solid var(--c-amber);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ---------- Carrousel ---------- */

.histoire-carrousel {
    position: relative;
    display: flex;
    align-items: stretch;
    width: 100%;
    background: var(--c-navy-2);
}

.carrousel-fenetre {
    flex: 1;
    overflow: hidden;
}

.carrousel-piste {
    display: flex;
    width: 100%;
    transition: transform 0.5s cubic-bezier(0.65, 0, 0.35, 1);
}

.carrousel-slide {
    flex: 0 0 100%;
    box-sizing: border-box;
    padding: var(--slide-espace-x) var(--slide-espace-y);
    display: flex;
    flex-direction: column;
    gap: 1.3rem;
    min-height: 420px;
}

.slide-date {
    font-family: var(--f-display);
    font-size: clamp(2rem, 8vw, 6rem);
    font-weight: 500;
    color: var(--c-amber);
    line-height: 1;
    letter-spacing: 0.09em;
}

.slide-corps {
    display: grid;
    grid-template-columns: minmax(260px, 38%) 1fr;
    gap: 3rem;
    align-items: center;
    flex: 1;
    min-width: 0;
}

.slide-photo {
    position: relative;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    border-radius: 8px;
    background: var(--c-navy-2);
    box-shadow: 0 25px 50px -22px rgba(0, 0, 0, 0.6);
}

.slide-photo img {
    width: 100%;
    height: 100%;
    max-width: 100%;
    object-fit: contain;
    object-position: center;
    display: block;
}

/* Contour fondu : les bords de la photo se fondent dans le fond,
   sans bordure nette */
.slide-photo::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    box-shadow: inset 0 0 40px 18px var(--c-navy-2);
    pointer-events: none;
}

.slide-texte {
    color: var(--c-white);
    font-family: var(--f-body);
}

.slide-titre {
    font-family: var(--f-display);
    color: var(--c-white);
    font-size: 1.5rem;
    margin: 0 0 1rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.slide-texte p {
    font-size: 1.05rem;
    line-height: 1.7;
    color: #d4d7e0;
    margin: 0;
}

/* ---------- Boutons prev/next ---------- */

.carrousel-nav {
    flex: 0 0 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--c-grey);
    font-size: 2.5rem;
    cursor: pointer;
    transition: color 0.2s ease, background 0.2s ease;
}

.carrousel-nav:hover {
    color: var(--c-amber);
    background: rgba(232, 163, 61, 0.08);
}

.carrousel-nav:focus-visible {
    outline: 2px solid var(--c-amber);
    outline-offset: -4px;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
    .slide-corps {
        grid-template-columns: 1fr;
    }

}

@media (max-width: 640px) {
    .histoire-frise {
        padding: 3rem 4vw 4rem;
        overflow-x: auto;
    }

    .frise-track {
        width: max(700px, 100%);
    }

    .carrousel-nav {
        flex-basis: 40px;
        font-size: 1.8rem;
    }

    .carrousel-slide {
        padding: calc(var(--slide-espace-x) * 0.65) var(--slide-espace-y);
    }
}

@media (prefers-reduced-motion: reduce) {
    .carrousel-piste {
        transition: none;
    }
}