body {
    font-family: 'Poppins', sans-serif;
    background-color: #ecf0f1;
    color: #2c3e50;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 250px;
    background-color: #ffffff;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar .logo {
    text-align: center;
    margin-bottom: 30px;
}

.sidebar .nav-link {
    color: #2c3e50;
    padding: 10px 15px;
    margin: 5px 0;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    background-color: #3498db;
    color: #ffffff;
}

.main-content {
    margin-left: 250px;
    padding: 20px;
}

.header {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    background-color: #ffffff;
    padding: 10px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.header .user-profile {
    display: flex;
    align-items: center;
}

.header .user-profile img {
    border-radius: 50%;
    margin-right: 10px;
}

.card {
    background-color: #ffffff;
    border: none;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);
}