/* Leaf Ledger Pro — Design System (v4.0 'Titan' Theme) */
:root {
    /* Brand Colors (Constant) */
    --brand-green: #10B981;
    --brand-red: #EF4444;
    --brand-yellow: #F59E0B;
    --brand-green-glow: rgba(16, 185, 129, 0.2);
    --brand-red-glow: rgba(239, 68, 68, 0.2);
    
    /* Transition & Shadows */
    --transit: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    
    /* Layout Constants */
    --sidebar-width: 280px;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
}

/* Light Mode Variables */
:root, [data-theme='light'] {
    --bg-app: #f8fafc;
    --bg-surface: #ffffff;
    --bg-card: #ffffff;
    --bg-input: #f1f5f9;
    
    --border-main: #e2e8f0;
    --border-light: #f1f5f9;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --nav-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.5);
    --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05);
}

/* Dark Mode Variables */
[data-theme='dark'] {
    --bg-app: #020617;
    --bg-surface: #0f172a;
    --bg-card: #1e293b;
    --bg-input: #0f172a;
    
    --border-main: #334155;
    --border-light: #1e293b;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --nav-bg: rgba(15, 23, 42, 0.85);
    --glass-border: rgba(255, 255, 255, 0.05);
    --card-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

/* Global Foundations */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

.main-content {
    margin-top: 70px;
    width: 100%;
    min-height: calc(100vh - 70px);
    padding: 40px 80px;
    box-sizing: border-box;
    transition: var(--transit);
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-app);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background-color 0.5s ease, color 0.5s ease;
}

/* Glassmorphism Classes */
.glass {
    background: var(--nav-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-main);
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
    transition: var(--transit);
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--brand-green);
}

/* Animations */
@keyframes entrance {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.staggered-entrance {
    animation: entrance 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
}

/* Responsive Foundations */
@media (max-width: 1024px) {
    .main-content {
        padding: 30px 40px;
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: 20px;
    }
    h1 {
        font-size: 1.8rem !important;
    }
    
    /* Universal Mobile Stacking Utilities */
    .mobile-stack {
        flex-direction: column !important;
        grid-template-columns: 1fr !important;
        gap: 15px !important;
    }
    .mobile-hide {
        display: none !important;
    }
}

/* Universal Table Responsiveness */
.responsive-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    width: 100%;
    margin-bottom: 20px;
}

.responsive-table-wrapper table {
    min-width: 800px; /* Force scroll for dense ledgers */
}