body { 
    background-color: #f0f0f0;
    min-height: 100vh;
}
.wrapper {
    display: flex;
    min-height: 100vh;
}
.sidebar {
    width: 250px;
    background-color: #333;
    padding: 2rem 1rem;
    color: white;
    flex-shrink: 0;
}
.sidebar .logo {
    height: 100px;
    margin-bottom: 2rem;
    display: block;
    margin-left: auto;
    margin-right: auto;
}
.sidebar .nav-link {
    color: rgba(255,255,255,0.8);
    padding: 0.5rem 1rem;
    margin-bottom: 0.5rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}
.sidebar .nav-link:hover {
    color: white;
    background-color: rgba(255,255,255,0.1);
}
.sidebar .nav-link.active {
    color: white;
    background-color: rgba(255,255,255,0.2);
}
.content {
    flex-grow: 1;
    padding: 2rem;
}
.table-responsive { 
    background-color: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-top: 1rem;
}
.welcome-card {
    background-color: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    max-width: 800px;
    margin: 0 auto;
}