/* ===== CONTENEUR GLOBAL ===== */
.accordeonItem {
    border-radius: 18px;
    overflow: hidden;
    background: #020617;
    box-shadow: 0 20px 45px rgba(0,0,0,.55);
    transition: transform .3s ease, box-shadow .3s ease;
}

.accordeonItem:hover {
    transform: translateY(-4px);
}

/* ===== IMAGE = BOUTON ===== */
.accordeonItemHeader {
    position: relative;
    cursor: pointer;
}

.accordeonItemHeader img {
    width: 100%;
    height: 240px;
    object-fit: cover;
    display: block;
    transition: transform .4s ease, filter .4s ease;
}

/* effet hover image */
.accordeonItemHeader:hover img {
    transform: scale(1.05);
    filter: brightness(0.7);
}

/* ===== OVERLAY ===== */
.accordeonItemHeader::after {
    content: "Voir plus";
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 20px;
    color: #38bdf8;
    background: rgba(2,6,23,.55);
    opacity: 0;
    transition: opacity .3s ease;
}

.accordeonItemHeader:hover::after {
    opacity: 1;
}

/* ===== CONTENU ===== */
.accordeonItemContent {
    background: #020617;
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height .45s ease, padding .3s ease;
}

/* ouvert */
.accordeonItem.ouvert .accordeonItemContent {
    max-height: 600px;
    padding: 22px 24px 26px;
}

/* ===== TEXTE ===== */
.accordeonItemContent h2 {
    font-size: 20px;
    margin-bottom: 12px;
    color: #f8fafc;
}

.accordeonItemContent p {
    font-size: 15px;
    line-height: 1.65;
    color: #cbd5f5;
}

/* ===== BOUTON ===== */
.accordeonItemContent .bouton {
    display: inline-block;
    margin-top: 16px;
    padding: 12px 18px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    color: #020617;
    background: linear-gradient(135deg, #38bdf8, #2563eb);
    transition: transform .2s ease, box-shadow .2s ease;
}

.accordeonItemContent .bouton:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(56,189,248,.5);
}

/* ===== ÉTAT OUVERT VISUEL ===== */
.accordeonItem.ouvert {
    box-shadow: 0 30px 70px rgba(56,189,248,.25);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .accordeonItemHeader img {
        height: 200px;
    }

    .accordeonItemContent h2 {
        font-size: 18px;
    }

    .accordeonItemContent p {
        font-size: 14px;
    }
}

.articlecomplet {
    max-width: 1200px;   /* largeur max */
    margin: 60px auto;   /* centré */
    padding: 0 20px;     /* respiration mobile */
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}