.banner_page {
    background-image: url("../images/image-exposants.png");
}

.nav {
    background-color: white;
}
.nav ul {
    background-color: white;
}
a {
    color: black;
}
.main {
    margin-top: 2rem;
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.main hr {
    margin-bottom: 2rem;
}
.conferenciers {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    padding: 2rem;
}

.conferencier {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 30px;
    padding: 40px 5px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center; /* Centrer le contenu */
}

.img-circle-gradient {
    display: inline-block;
    border-radius: 50%;
    padding: 1px;
    background: radial-gradient(
        circle,
        #60c338 0%,
        #73df49 53%,
        #79e74d 100%
    );
}

.img-circle-wrapper {
    display: inline-block;
    border-radius: 50%;
    background: #ffffff;
    padding: 20px;
}

.img-circle {
    border-radius: 50%;
    max-width: 150px;
    max-height: 150px;
    object-fit: cover;
    display: block;
}

.name {
    margin: 10px 0 5px;
    font-size: 1.2em;
    font-weight: bold;
}

.title {
    font-size: 1em;
    color: #004aad;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    margin-top: 10px;
    text-decoration: none;
    color: #fff;
    background-color: #60c338;
    border-radius: 20px 0 20px 0;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #6cdd3f;
}

@media (max-width: 1200px) {
    .conferenciers {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .conferenciers {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .conferenciers {
        grid-template-columns: 1fr;
    }
}