/**
 * Modern Mobile-First Theme for INERTIA Investment Management
 * Progressive Web App (PWA) ready design system
 */

:root {
    /* Color Palette */
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --secondary-dark: #059669;
    --secondary-light: #34d399;
    --accent-color: #f59e0b;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --success-color: #10b981;
    --info-color: #3b82f6;
    
    /* Neutral Colors */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Spacing System */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
    
    /* Touch Targets (Mobile) */
    --touch-target-min: 44px;
}

/* Base Styles */
body.modern-app {
    font-family: var(--font-family-base);
    color: var(--gray-800);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Enhanced Cards */
.modern-app .card {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    background: white;
}

.modern-app .card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.modern-app .card-header {
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--spacing-md) var(--spacing-lg);
    font-weight: 600;
    color: var(--gray-900);
}

.modern-app .card-body {
    padding: var(--spacing-lg);
}

/* Enhanced Buttons - Touch Friendly */
.modern-app .btn {
    min-height: var(--touch-target-min);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-sm);
}

.modern-app .btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.modern-app .btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.modern-app .btn-primary {
    background: var(--primary-color);
    color: white;
}

.modern-app .btn-primary:hover {
    background: var(--primary-dark);
    color: white;
}

.modern-app .btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.modern-app .btn-secondary:hover {
    background: var(--secondary-dark);
    color: white;
}

/* Enhanced Form Controls */
.modern-app .form-control,
.modern-app .form-select {
    min-height: var(--touch-target-min);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    font-size: var(--font-size-base);
}

.modern-app .form-control:focus,
.modern-app .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    outline: none;
}

.modern-app .form-label {
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

/* Enhanced Tables - Mobile Responsive */
.modern-app .table-responsive {
    border-radius: var(--radius-md);
    overflow: hidden;
}

.modern-app .table {
    margin-bottom: 0;
}

.modern-app .table thead th {
    background: var(--gray-50);
    color: var(--gray-900);
    font-weight: 600;
    text-transform: uppercase;
    font-size: var(--font-size-xs);
    letter-spacing: 0.05em;
    padding: var(--spacing-md);
    border-bottom: 2px solid var(--gray-200);
}

.modern-app .table tbody tr {
    transition: background-color var(--transition-fast);
}

.modern-app .table tbody tr:hover {
    background-color: var(--gray-50);
}

.modern-app .table tbody td {
    padding: var(--spacing-md);
    vertical-align: middle;
}

/* Mobile Bottom Navigation */
.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid var(--gray-200);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    height: 60px;
}

.mobile-bottom-nav .nav-item {
    flex: 1;
    text-align: center;
}

.mobile-bottom-nav .nav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xs);
    color: var(--gray-500);
    text-decoration: none;
    transition: color var(--transition-fast);
    min-height: var(--touch-target-min);
}

.mobile-bottom-nav .nav-link i {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
}

.mobile-bottom-nav .nav-link span {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.mobile-bottom-nav .nav-link.active {
    color: var(--primary-color);
}

.mobile-bottom-nav .nav-link:active {
    opacity: 0.7;
}

/* Show mobile nav only on mobile */
@media (max-width: 991.98px) {
    .mobile-bottom-nav {
        display: flex;
    }
    
    /* Add padding to body to prevent content from being hidden behind nav */
    body.modern-app {
        padding-bottom: 60px;
    }
}

/* Enhanced Navbar */
.modern-app .navbar.modern-navbar {
    box-shadow: var(--shadow-md);
    padding: var(--spacing-sm) 0;
}

.modern-app .navbar-nav .nav-link {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

/* Loading States */
.modern-app .spinner-border {
    width: 2rem;
    height: 2rem;
    border-width: 0.2em;
}

.modern-app .spinner-border-sm {
    width: 1rem;
    height: 1rem;
    border-width: 0.15em;
}

/* Badges */
.modern-app .badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: var(--font-size-xs);
}

/* Alerts */
.modern-app .alert {
    border-radius: var(--radius-md);
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

/* Custom Scrollbar */
.modern-app ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.modern-app ::-webkit-scrollbar-track {
    background: var(--gray-100);
}

.modern-app ::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: var(--radius-full);
}

.modern-app ::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

/* Responsive Typography */
@media (max-width: 767.98px) {
    .modern-app h1 {
        font-size: var(--font-size-2xl);
    }
    
    .modern-app h2 {
        font-size: var(--font-size-xl);
    }
    
    .modern-app h3 {
        font-size: var(--font-size-lg);
    }
    
    .modern-app .card-body {
        padding: var(--spacing-md);
    }
}

/* Focus States for Accessibility */
.modern-app *:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Smooth Scrolling */
@media (prefers-reduced-motion: no-preference) {
    .modern-app {
        scroll-behavior: smooth;
    }
}

/* Print Styles */
@media print {
    .mobile-bottom-nav {
        display: none !important;
    }
    
    .modern-app .card {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
}