/* --- Body --- */
body {
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
    background-color: #f3f0f9;
    color: #333;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* --- Header violet --- */
header {
    background: linear-gradient(135deg, #6a11cb, #8e2de2);
    color: #fff;
    padding: 30px 0 15px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    z-index: 1000;
}

/* --- Titre Tableau de bord --- */
header h1 {
    margin: 0;
    font-size: 2rem;
    font-weight: 700;
}

/* --- Conteneur boutons --- */
.header-buttons {
    margin-top: 10px;
    display: flex;
    gap: 10px;
}

/* --- Boutons violet --- */
.btn {
    padding: 10px 20px;
    background: linear-gradient(135deg, #6a11cb, #8e2de2);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.2s ease;
}

.btn:hover {
    background: linear-gradient(135deg, #8e2de2, #6a11cb);
    transform: translateY(-2px);
}

/* --- Main contenu --- */
main {
    flex: 1;
    margin-top: 140px; /* hauteur du header */
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}

/* --- Tableau stylé --- */
table {
    width: 90%;
    max-width: 900px;
    border-collapse: collapse;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin-top: 20px;
}

table th, table td {
    padding: 12px 15px;
    border-bottom: 1px solid #ddd;
    text-align: left;
}

table th {
    background-color: #8e2de2;
    color: #fff;
}

table tr:hover {
    background-color: #f5e9ff;
}

/* --- Footer violet --- */
footer {
    background: #6a11cb;
    color: #fff;
    text-align: center;
    padding: 15px 0;
    width: 100%;
    box-shadow: 0 -2px 5px rgba(0,0,0,0.2);
    font-size: 0.95rem;
    position: fixed;
    bottom: 0;
}