/* Vozol 40K Technical Comparison Site Styles */

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #059669;
    --warning-color: #d97706;
    --danger-color: #dc2626;
    --light-bg: #f8fafc;
    --dark-bg: #1e293b;
    --text-primary: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

/* Global Styles */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: #ffffff;
}

/* Typography */
.display-4, .display-5 {
    font-weight: 700;
    letter-spacing: -0.025em;
}

.lead {
    font-size: 1.125rem;
    font-weight: 400;
}

/* Navigation */
.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: #ffffff !important;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 0.375rem;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-bottom: 1px solid var(--border-color);
}

.hero-section .btn {
    font-weight: 600;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.hero-section .btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Hero Stats Section */
.hero-stats {
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.hero-stats:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-item h3 {
    font-weight: 700;
    font-size: 1.75rem;
}

.stat-item small {
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Cards */
.card {
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    transition: all 0.3s ease;
    background: #ffffff;
}

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

.card-header {
    border-bottom: 1px solid var(--border-color);
    border-radius: 0.75rem 0.75rem 0 0 !important;
    font-weight: 600;
}

/* Tables */
.table {
    margin-bottom: 0;
}

.table th {
    font-weight: 600;
    border-bottom: 2px solid var(--primary-color);
    color: var(--text-primary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table td {
    vertical-align: middle;
    font-size: 0.9rem;
}

.table-striped > tbody > tr:nth-of-type(odd) > td {
    background-color: rgba(37, 99, 235, 0.02);
}

.table-hover tbody tr:hover {
    background-color: rgba(37, 99, 235, 0.05);
}

/* Enhanced table styles */
.table tbody tr {
    transition: all 0.3s ease;
}

.table tbody tr:hover {
    transform: scale(1.01);
    box-shadow: var(--shadow-sm);
}

/* DataTables Customization */
.dataTables_wrapper .dataTables_length select,
.dataTables_wrapper .dataTables_filter input {
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    padding: 0.375rem 0.75rem;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: white !important;
}

/* Badges */
.badge {
    font-weight: 600;
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
}

/* Alerts */
.alert {
    border: none;
    border-radius: 0.75rem;
    padding: 1.5rem;
}

.alert-info {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    border-left: 4px solid var(--primary-color);
}

/* Accordion */
.accordion-item {
    border: 1px solid var(--border-color);
    margin-bottom: 0.5rem;
    border-radius: 0.5rem !important;
    overflow: hidden;
}

.accordion-button {
    font-weight: 600;
    background-color: #ffffff;
    border: none;
    padding: 1rem 1.25rem;
}

.accordion-button:not(.collapsed) {
    background-color: rgba(37, 99, 235, 0.05);
    color: var(--primary-color);
    box-shadow: none;
}

.accordion-button:focus {
    box-shadow: 0 0 0 0.25rem rgba(37, 99, 235, 0.25);
}

.accordion-body {
    padding: 1.25rem;
    background-color: #ffffff;
}

/* Charts */
.chart-container {
    position: relative;
    height: 300px;
    margin: 1rem 0;
}

#batteryChart, #costChart {
    max-height: 400px;
}

/* Buttons */
.btn {
    font-weight: 600;
    border-radius: 0.5rem;
    padding: 0.625rem 1.25rem;
    transition: all 0.3s ease;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background-color: transparent;
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-1px);
}

/* Loading states */
.btn.loading {
    position: relative;
    color: transparent;
}

.btn.loading::after {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid transparent;
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--dark-bg) 0%, #0f172a 100%);
}

footer h5 {
    color: #ffffff;
    margin-bottom: 1rem;
}

footer a {
    transition: color 0.3s ease;
}

footer a:hover {
    color: #ffffff !important;
}

/* Navbar scroll effect */
.navbar-scrolled {
    background-color: rgba(37, 99, 235, 0.95) !important;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

/* Mobile optimizations */
@media (max-width: 576px) {
    .hero-section {
        padding: 2rem 0;
    }
    
    .hero-section .display-4 {
        font-size: 1.75rem;
    }
    
    .card-body {
        padding: 0.75rem;
    }
    
    .btn-lg {
        padding: 0.5rem 1rem;
        font-size: 1rem;
    }
    
    .accordion-button {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 768px) {
    .hero-section .display-4 {
        font-size: 2rem;
    }
    
    .hero-section .lead {
        font-size: 1rem;
    }
    
    .hero-section .btn {
        padding: 0.5rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .table-responsive {
        font-size: 0.8rem;
    }
}

/* Dark mode support (future feature) */
@media (prefers-color-scheme: dark) {
    .dark-mode {
        background-color: #1a1a1a;
        color: #ffffff;
    }
    
    .dark-mode .card {
        background-color: #2d2d2d;
        border-color: #404040;
    }
    
    .dark-mode .table {
        color: #ffffff;
    }
    
    .dark-mode .table-striped > tbody > tr:nth-of-type(odd) > td {
        background-color: rgba(255, 255, 255, 0.05);
    }
}

/* Accessibility improvements */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles for better accessibility */
.btn:focus,
.accordion-button:focus,
.nav-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Animation classes */
.fade-in {
    animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.slide-up {
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(37, 99, 235, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Utility Classes */
.text-primary { color: var(--primary-color) !important; }
.bg-primary { background-color: var(--primary-color) !important; }
.border-primary { border-color: var(--primary-color) !important; }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* Print Styles */
@media print {
    .navbar, .btn, footer {
        display: none !important;
    }
    
    .card {
        border: 1px solid #000 !important;
        box-shadow: none !important;
    }
    
    .table {
        font-size: 12px;
    }
}