.tn-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: none;
}

.tn-modal.is-open {
    display: block;
}

/* empêche le scroll derrière */
body.tn-modal-open {
    overflow: hidden;
}

.tn-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(5, 10, 78, 0.45);
    backdrop-filter: blur(3px);
    opacity: 0;
    transition: opacity .25s ease;
}

.tn-modal.is-open .tn-modal__backdrop {
    opacity: 1;
}

.tn-modal__dialog {
    position: relative;
    width: min(720px, 92vw);
    margin: 6vh auto;
    background: #fff;
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid rgba(206, 179, 97, 0.25);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);

    transform: translateY(20px) scale(.98);
    opacity: 0;
    transition: all .25s ease;
}

.tn-modal.is-open .tn-modal__dialog {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.tn-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px;
    border-bottom: 1px solid rgba(5, 10, 78, 0.08);
    background: #fff;
}

#tn-modal-title {
    color: #050A4E;
    font-size: 20px;
    font-weight: 600;
    margin: 0;
}

/* bouton fermer */
.tn-modal__close {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: 1px solid rgba(5, 10, 78, 0.12);
    background: #fff;
    font-size: 18px;
    cursor: pointer;
    transition: .2s ease;
}

.tn-modal__close:hover {
    border-color: rgba(206, 179, 97, 0.65);
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.12);
    transform: translateY(-1px);
}

.tn-modal__body {
    padding: 20px 22px 22px;
    background: #fff;
}

.tn-btn {
    padding: 10px 16px;
    border-radius: 10px;
    cursor: pointer;
    border: 1px solid rgba(5, 10, 78, .15);
    background: #fff;
    color: #050A4E;
    font-weight: 500;
    transition: .2s ease;
}

.tn-btn:hover {
    border-color: rgba(206, 179, 97, 0.7);
}

/* bouton principal (charte or) */
.tn-btn-primary {
    border: 2px solid #ceb361;
    background: transparent;
    color: #050A4E;
    font-weight: 700;
    letter-spacing: .5px;
    text-transform: uppercase;
}

.tn-btn-primary:hover {
    background: linear-gradient(135deg, #ceb361, #e4c879);
    box-shadow: 0 10px 22px rgba(0, 0, 0, 0.14);
    transform: translateY(-1px);
}

@media (max-width: 640px) {

    .tn-modal__dialog {
        margin: 3vh auto;
        border-radius: 14px;
    }

    .tn-modal__header,
    .tn-modal__body,
    .tn-modal__footer {
        padding: 16px;
    }
}