/* Style général */
body {
    margin: 0;
    padding: 0;
    font-family: "Poppins", Arial, sans-serif;
    background: linear-gradient(135deg, #e0f0ff, #ffffff);
    color: #222;
}

/* Conteneur principal */
.container {
    max-width: 700px;
    margin: 100px auto;
    text-align: center;
    background: #fff;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* Titre principal */
h1 {
    color: #004c99;
    margin-bottom: 10px;
}

/* Date et détails */
.date {
    font-size: 1.2em;
    color: #333;
    margin-bottom: 15px;
}

.details {
    font-size: 1.1em;
    line-height: 1.6;
    margin-bottom: 30px;
}

/* Boutons */
.buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.btn {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 30px;
    text-decoration: none;
    color: white;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.btn.download {
    background-color: #0078d7;
}

.btn.download:hover {
    background-color: #005fa3;
}

.btn.register {
    background-color: #28a745;
}

.btn.register:hover {
    background-color: #1e7e34;
}

/* Sponsors */
.sponsors {
    border-top: 1px solid #ddd;
    padding-top: 20px;
}

.sponsors h2 {
    color: #004c99;
    margin-bottom: 10px;
}

.sponsors ul {
    list-style: none;
    padding: 0;
    font-size: 1.05em;
}

.sponsors li {
    margin: 5px 0;
}