/* Variables de colores y diseño moderno */
:root {
    --primary-color: #4f46e5; /* Indigo */
    --primary-hover: #4338ca;
    --success-color: #10b981; /* Emerald for income */
    --danger-color: #ef4444; /* Red for expense */
    --warning-color: #f59e0b; /* Amber for debt */
    --info-color: #3b82f6; /* Blue for savings/investment */
    --bg-light: #f8fafc;
    --text-dark: #1e293b;
    --text-muted: #64748b;
    --sidebar-width: 250px;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
}

/* Utilidades de texto */
.text-income { color: var(--success-color) !important; }
.text-expense { color: var(--danger-color) !important; }

/* Botones personalizados */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}
.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

/* Sidebar (Desktop) */
#sidebar {
    width: var(--sidebar-width);
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    padding: 48px 0 0; 
    box-shadow: inset -1px 0 0 rgba(0, 0, 0, .1);
    background-color: #fff;
    transition: transform 0.3s ease-in-out;
}

#sidebar .nav-link {
    font-weight: 500;
    color: var(--text-muted);
    padding: 0.75rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#sidebar .nav-link.active, #sidebar .nav-link:hover {
    color: var(--primary-color);
    background-color: #e0e7ff;
    border-radius: 0 20px 20px 0;
    margin-right: 1rem;
}

/* Contenido Principal */
main {
    margin-left: var(--sidebar-width);
    padding-top: 60px; /* Espacio para navbar movil */
}

/* Navbar Móvil */
.mobile-navbar {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 1030;
    background-color: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* Tarjetas de Dashboard */
.summary-card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: transform 0.2s;
}
.summary-card:hover {
    transform: translateY(-2px);
}

/* Responsive */
@media (max-width: 767.98px) {
    #sidebar {
        transform: translateX(-100%);
    }
    #sidebar.show {
        transform: translateX(0);
    }
    main {
        margin-left: 0;
    }
    .mobile-navbar {
        display: flex;
    }
}