body {
    background-color: #F4F7F6;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: #333;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 250px;
    background-color: #fff;
    padding: 1.5rem;
    box-shadow: 0 0 2rem rgba(0, 0, 0, 0.05);
}

.sidebar h3 {
    font-weight: 700;
    margin-bottom: 2rem;
    background: linear-gradient(45deg, #4A90E2, #50E3C2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar .nav-link {
    color: #555;
    font-weight: 500;
    padding: 0.75rem 0;
    transition: all 0.2s ease;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    color: #4A90E2;
    transform: translateX(5px);
}

.main-content {
    margin-left: 250px;
    padding: 2rem;
}

.stat-card {
    background-color: #fff;
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 1rem 1.5rem rgba(0, 0, 0, 0.08);
}

.stat-card .stat-title {
    font-size: 1rem;
    color: #777;
    font-weight: 500;
}

.stat-card .stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: #333;
}

.stat-card .stat-icon {
    font-size: 2rem;
    color: #4A90E2;
}