body {
    margin: 0;
    display: grid;
    grid-template-columns: 250px 1fr;
    grid-template-rows: 60px auto;
    grid-template-areas:
        "sidebar navbar"
        "sidebar stats"
        "sidebar content";
    height: 100vh;
    gap: 10px;
    font-family: Arial, sans-serif;
    background: #f5f6fa;
}

.sidebar {
    grid-area: sidebar;
    background: #2c3e50;
    color: white;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

.sidebar li {
    padding: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar li:hover {
    background: #34495e;
    border-radius: 5px;
}

.navbar {
    grid-area: navbar;
    background: #34495e;
    color: white;
    display: flex;
    align-items: center;
    padding: 0 20px;
    font-size: 1.5em;
    font-weight: bold;
}

.stats {
    grid-area: stats;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    padding: 15px;
}

.stat-box {
    background: linear-gradient(135deg, #1abc9c, #16a085);
    padding: 20px;
    text-align: center;
    color: white;
    font-size: 1.2em;
    font-weight: bold;
    border-radius: 10px;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.2);
}

.content {
    grid-area: content;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.1);
    margin: 15px;
}

@media (max-width: 768px) {
    body {
        grid-template-columns: 1fr;
        grid-template-rows: 60px auto auto auto;
        grid-template-areas:
            "navbar"
            "stats"
            "content"
            "sidebar";
    }

    .sidebar {
        display: flex;
        justify-content: center;
        text-align: center;
        padding: 10px;
    }
    
    .stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stats {
        grid-template-columns: 1fr;
    }
}