body {
    font-family: 'Roboto', sans-serif;
    background-color: #f4f7fc;
    margin: 0;
    padding: 0;
    color: #333;
}
.container {
    max-width: 900px;
    margin: 20px auto;
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}
h1 {
    text-align: center;
    color: #3b3f50;
}
/* Style du menu */
.menu {
    list-style-type: none;
    padding: 0;
}
.menu > li {
    background-color: #007bff;
    color: white;
    padding: 10px;
    cursor: pointer;
    border-radius: 4px;
    margin: 5px 0;
}
.menu > li:hover {
    background-color: #0056b3;
}
.submenu {
    list-style-type: none;
    padding-left: 20px;
    display: none;
    margin: 0;
}
.submenu li {
    background-color: #f1f1f1;
    color: #333;
    padding: 8px;
    border-radius: 4px;
    margin: 5px 0;
}
.submenu li:hover {
    background-color: #ddd;
}
/* Interaction au clic */
.menu > li.active + .submenu {
    display: block;
}
/* Style du lien */
a {
    color: #007bff;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
.sidebar {
    background: #2c3e50;
    min-height: 100vh;
    padding-top: 20px;
}
.sidebar .nav-link {
    color: #ecf0f1;
    border-radius: 5px;
    margin-bottom: 5px;
}
.sidebar .nav-link:hover, .sidebar .nav-link.active {
    background: #3498db;
}
.main-content {
    margin-left: 280px;
}
@media (max-width: 992px) {
    .sidebar {
        position: fixed;
        z-index: 1000;
        width: 280px;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    .sidebar.active {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
    }
}
.kpi-card {
    transition: transform 0.3s;
}
.kpi-card:hover {
    transform: translateY(-5px);
}