html, body {
    margin: 0;
    height: 100%;
}

#uc-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
}

    #uc-bg canvas {
        position: fixed !important;
        top: 0;
        left: 0;
        width: 100% !important;
        height: 100% !important;
        z-index: -9999 !important;
        pointer-events: none; /* ne bloque pas les clics */
    }

.uc-content {
    position: relative;
    z-index: 1;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem 3rem;
    background: rgba(0,0,0,0.45); /* fond plus sombre */
    backdrop-filter: blur(8px); /* effet verre dépoli */
    border-radius: 1rem;
    max-width: 600px;
    margin: auto;
    color: #f3f4f6; /* gris clair lisible */
    box-shadow: 0 8px 25px rgba(0,0,0,0.4); /* profondeur */
}

    .uc-content h1 {
        font-size: clamp(2rem, 6vw, 3rem);
        margin-bottom: 1rem;
        background: linear-gradient(90deg, #6366f1, #9333ea);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        font-weight: 800;
        text-shadow: 1px 1px 10px rgba(0,0,0,0.6); /* renforce la lisibilité */
    }

    .uc-content p {
        font-size: 1.2rem;
        opacity: 0.95;
        text-shadow: 1px 1px 8px rgba(0,0,0,0.6); /* lisible même sur halo clair */
    }