body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: #f4f6f9;
}

.main-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background: #1f2937;
    color: white;
    padding: 20px;
}

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

.sidebar ul {
    list-style: none;
    padding: 0;
}

.sidebar ul li {
    margin: 15px 0;
}

.sidebar ul li a {
    color: #d1d5db;
    text-decoration: none;
    font-size: 16px;
    transition: 0.3s;
}

.sidebar ul li a:hover {
    color: white;
    padding-left: 5px;
}

.content {
    flex: 1;
    padding: 40px;
}

.card {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0px 4px 15px rgba(0,0,0,0.05);
}

footer {
    text-align: center;
    padding: 15px;
    background: #111827;
    color: white;
}