/* Root Variables */
:root {
    --color-black: #0D0D0D;
    --color-dark-gray: #262626;
    --color-medium-gray: #595959;
    --color-light-gray: #A6A6A6;
    --color-white: #F2F2F2;
    --primary-color: #0066cc;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --transition: all 0.3s ease;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --bs-body-bg: var(--color-black);
    --bs-body-color: var(--color-white);
    --bs-card-bg: var(--color-dark-gray);
    --bs-border-color: var(--color-medium-gray);
}

/* Base Styles - Swiss Design Principles */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-black);
    background-color: var(--color-white);
    transition: var(--transition);
}

/* Typography - Swiss Style */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 2rem); }

p {
    margin-bottom: 1rem;
    font-size: 1rem;
    line-height: 1.7;
}

/* Navigation */
.navbar {
    background: linear-gradient(135deg, var(--primary-color), #004499) !important;
    box-shadow: var(--box-shadow);
    padding: 1rem 0;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: var(--transition);
}

.navbar-nav .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    min-height: 60vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e0e0e0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    z-index: 0;
}

.hero-section .container {
    position: relative;
    z-index: 1;
}

.barcode-demo {
    border: 2px solid var(--color-light-gray);
    transition: var(--transition);
}

.barcode-demo:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.card-header {
    border-bottom: none;
    padding: 1.5rem;
}

.card-body {
    padding: 2rem;
}

/* Forms */
.form-control, .form-select {
    border: 2px solid var(--color-light-gray);
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25);
}

.form-control-lg {
    padding: 1rem 1.25rem;
    font-size: 1.125rem;
}

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #004499);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #004499, #003366);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #1e7e34);
}

.btn-success:hover {
    background: linear-gradient(135deg, #1e7e34, #155724);
    transform: translateY(-1px);
}

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

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

/* Tabs */
.nav-tabs {
    border-bottom: 2px solid var(--color-light-gray);
    margin-bottom: 2rem;
}

.nav-tabs .nav-link {
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--color-medium-gray);
    font-weight: 600;
    padding: 1rem 1.5rem;
    transition: var(--transition);
}

.nav-tabs .nav-link.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background-color: transparent;
}

.nav-tabs .nav-link:hover {
    border-bottom-color: var(--primary-color);
    color: var(--primary-color);
}

/* Result Cards */
.result-card {
    transition: var(--transition);
    cursor: pointer;
}

.result-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.result-canvas {
    border: 1px solid var(--color-light-gray);
    border-radius: var(--border-radius);
    max-width: 100%;
    height: auto;
}

/* Badges */
.badge {
    font-weight: 600;
    padding: 0.5rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.accordion-button {
    font-weight: 600;
    padding: 1rem 1.5rem;
    background-color: var(--color-white);
    border: none;
}

.accordion-button:not(.collapsed) {
    background-color: var(--primary-color);
    color: white;
}

.accordion-button:focus {
    box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25);
}

.accordion-body {
    padding: 1.5rem;
}

/* Camera Section */
#cameraVideo {
    border: 3px solid var(--primary-color);
    border-radius: var(--border-radius);
}

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

.spinner-border {
    width: 3rem;
    height: 3rem;
}

/* Alerts */
.alert {
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    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(40, 167, 69, 0.1);
    color: #155724;
    border-left: 4px solid var(--success-color);
}

.alert-warning {
    background-color: rgba(255, 193, 7, 0.1);
    color: #856404;
    border-left: 4px solid var(--warning-color);
}

.alert-danger {
    background-color: rgba(220, 53, 69, 0.1);
    color: #721c24;
    border-left: 4px solid var(--danger-color);
}

/* Tables */
.table {
    font-size: 0.875rem;
}

.table th {
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.75rem;
    color: var(--color-medium-gray);
    border-bottom: 2px solid var(--color-light-gray);
}

/* Offcanvas */
.offcanvas {
    border: none;
    box-shadow: -4px 0 15px rgba(0, 0, 0, 0.1);
}

.offcanvas-header {
    border-bottom: 1px solid var(--color-light-gray);
    padding: 1.5rem;
}

.offcanvas-body {
    padding: 1.5rem;
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--color-dark-gray), var(--color-black)) !important;
    color: var(--color-white);
}

footer a {
    color: var(--color-light-gray);
    text-decoration: none;
    transition: var(--transition);
}

footer a:hover {
    color: var(--color-white);
    text-decoration: underline;
}

/* Dark Mode Styles */
[data-theme="dark"] {
    background-color: var(--color-black);
    color: var(--color-white);
}

[data-theme="dark"] .hero-section {
    background: linear-gradient(135deg, var(--color-dark-gray), var(--color-medium-gray));
}

[data-theme="dark"] .card {
    background-color: var(--color-dark-gray);
    color: var(--color-white);
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: var(--color-medium-gray);
    border-color: var(--color-light-gray);
    color: var(--color-white);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background-color: var(--color-medium-gray);
    border-color: var(--primary-color);
    color: var(--color-white);
}

[data-theme="dark"] .accordion-button {
    background-color: var(--color-dark-gray);
    color: var(--color-white);
}

[data-theme="dark"] .accordion-body {
    background-color: var(--color-medium-gray);
    color: var(--color-white);
}

[data-theme="dark"] .table {
    color: var(--color-white);
}

[data-theme="dark"] .table th {
    color: var(--color-light-gray);
    border-color: var(--color-medium-gray);
}

[data-theme="dark"] .offcanvas {
    background-color: var(--color-dark-gray);
    color: var(--color-white);
}

[data-theme="dark"] .modal-content {
    background-color: var(--color-dark-gray);
    color: var(--color-white);
}

[data-theme="dark"] .barcode-demo {
    background-color: var(--color-medium-gray) !important;
}

/* Responsive Design - Mobile First */
@media (max-width: 576px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .hero-section {
        min-height: 50vh;
        text-align: center;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .lead {
        font-size: 1rem;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .btn-lg {
        padding: 0.875rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .nav-tabs .nav-link {
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }
    
    .barcode-demo {
        margin-top: 2rem;
    }
    
    #cameraVideo {
        max-width: 100%;
        height: auto;
    }
}

@media (max-width: 768px) {
    .hero-section .row {
        text-align: center;
    }
    
    .hero-section .col-lg-6:last-child {
        margin-top: 2rem;
    }
    
    .offcanvas {
        width: 90vw !important;
    }
}

@media (min-width: 992px) {
    .hero-section {
        min-height: 70vh;
    }
    
    .container {
        max-width: 1140px;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .btn,
    .alert,
    footer {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #000;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

.slide-up {
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

/* Utility Classes */
.text-shadow {
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color), #004499);
}

.border-primary-thick {
    border: 3px solid var(--primary-color) !important;
}

.cursor-pointer {
    cursor: pointer;
}

/* Focus Styles for Accessibility */
.btn:focus,
.form-control:focus,
.form-select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --color-black: #000000;
        --color-white: #ffffff;
        --primary-color: #0000ff;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}

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