body {
    background-color: #f8f9fa;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 240px;
    min-height: 100vh;
    position: sticky;
    top: 0;
    flex-shrink: 0;
}

.sidebar-brand {
    font-size: 0.95rem;
}

.sidebar .nav-link {
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    margin-bottom: 2px;
}

.sidebar .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.sidebar .nav-link.active {
    background-color: rgba(255, 255, 255, 0.15);
    font-weight: 600;
}

/* Main content */
.main-content {
    min-height: 100vh;
    overflow-x: auto;
}

/* Cards & tables */
.card {
    border: 1px solid #e9ecef;
    border-radius: 8px;
}

.table th {
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #6c757d;
}

.display-6 {
    font-weight: 700;
}

/* Refresh spin animation */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.spin {
    animation: spin 0.6s linear infinite;
}