/**
 * DLMS Custom Styles
 * Mobile-first responsive design with Bootstrap 5 enhancements
 */

/* Root Variables */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-radius: 0.375rem;
    --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --box-shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
}

/* Global Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    line-height: 1.6;
}

/* Navigation Enhancements */
.navbar {
    box-shadow: var(--box-shadow);
    border-bottom: 1px solid #dee2e6;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color) !important;
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.75rem 1rem;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: var(--secondary-color) !important;
}

/* Card Enhancements */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.feature-card {
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-lg);
    border-color: var(--secondary-color);
}

/* Feature Icons */
.feature-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    transition: color 0.3s ease;
}

.feature-card:hover .feature-icon {
    color: var(--primary-color);
}

/* Button Enhancements */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: all 0.3s ease;
}

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

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

.btn-outline-primary {
    color: var(--secondary-color);
    border-color: var(--secondary-color);
}

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

/* Form Enhancements */
.form-control, .form-select {
    border-radius: var(--border-radius);
    border: 1px solid #ced4da;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

/* Table Enhancements */
.table {
    border-radius: var(--border-radius);
    overflow: hidden;
}

.table thead th {
    background-color: var(--light-color);
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
    color: var(--dark-color);
}

.table tbody tr {
    transition: background-color 0.3s ease;
}

.table tbody tr:hover {
    background-color: rgba(52, 152, 219, 0.05);
}

/* Badge Enhancements */
.badge {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.5em 0.75em;
    border-radius: var(--border-radius);
}

/* Alert Enhancements */
.alert {
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
}

.alert-info {
    background-color: rgba(23, 162, 184, 0.1);
    color: #0c5460;
    border-left: 4px solid var(--info-color);
}

.alert-success {
    background-color: rgba(39, 174, 96, 0.1);
    color: #155724;
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background-color: rgba(231, 76, 60, 0.1);
    color: #721c24;
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background-color: rgba(243, 156, 18, 0.1);
    color: #856404;
    border-left: 4px solid var(--warning-color);
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Mobile-First Responsive Design */
@media (max-width: 768px) {
    .container-fluid {
        padding: 0.5rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .feature-icon {
        font-size: 2rem;
    }
    
    .btn {
        font-size: 0.875rem;
        padding: 0.5rem 1rem;
    }
    
    .table-responsive {
        font-size: 0.875rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .form-control, .form-select {
        font-size: 0.875rem;
    }
}

@media (max-width: 576px) {
    .container-fluid {
        padding: 0.25rem;
    }
    
    .card {
        margin-bottom: 0.5rem;
    }
    
    .card-body {
        padding: 0.75rem;
    }
    
    .feature-icon {
        font-size: 1.5rem;
    }
    
    .btn {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
    
    .table {
        font-size: 0.8rem;
    }
    
    .navbar-nav .nav-link {
        padding: 0.5rem 0.75rem;
    }
}

/* PWA Ready Styles */
@media (display-mode: standalone) {
    .navbar {
        padding-top: env(safe-area-inset-top);
    }
    
    body {
        padding-bottom: env(safe-area-inset-bottom);
    }
}

/* Print Styles */
@media print {
    .navbar, .btn, .modal, .toast-container {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #dee2e6;
    }
    
    .table {
        font-size: 0.8rem;
    }
}

/* Accessibility Enhancements */
.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 States */
.btn:focus,
.form-control:focus,
.form-select:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .card {
        border: 2px solid var(--dark-color);
    }
    
    .btn-outline-primary {
        border-width: 2px;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --light-color: #343a40;
        --dark-color: #f8f9fa;
    }
    
    body {
        background-color: #212529;
        color: #f8f9fa;
    }
    
    .card {
        background-color: #343a40;
        color: #f8f9fa;
    }
    
    .table {
        color: #f8f9fa;
    }
    
    .table thead th {
        background-color: #495057;
        color: #f8f9fa;
    }
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

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

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