/* Root Variables */
:root {
    --primary-color: #00ADB5;
    --secondary-color: #393E46;
    --dark-color: #222831;
    --light-color: #EEEEEE;
    --accent-color: #FFD369;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    
    --font-family-base: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --border-radius: 8px;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --bs-body-bg: var(--dark-color);
    --bs-body-color: var(--light-color);
    --bs-card-bg: var(--secondary-color);
    --bs-border-color: #495057;
}

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

body {
    font-family: var(--font-family-base);
    line-height: 1.6;
    background-color: var(--light-color);
    color: var(--dark-color);
    transition: var(--transition);
}

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

[data-theme="dark"] .card {
    background-color: var(--secondary-color);
    border-color: #495057;
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: var(--secondary-color);
    border-color: #495057;
    color: var(--light-color);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background-color: var(--secondary-color);
    border-color: var(--primary-color);
    color: var(--light-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 173, 181, 0.25);
}

[data-theme="dark"] .accordion-item {
    background-color: var(--secondary-color);
    border-color: #495057;
}

[data-theme="dark"] .accordion-button {
    background-color: var(--secondary-color);
    color: var(--light-color);
    border-color: #495057;
}

[data-theme="dark"] .accordion-button:not(.collapsed) {
    background-color: var(--primary-color);
    color: white;
}

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

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

/* Header Styles */
.header-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 1020;
}

.navbar-brand {
    color: white !important;
    font-weight: bold;
    font-size: 1.5rem;
    text-decoration: none;
}

.navbar-brand i {
    margin-right: 0.5rem;
    font-size: 1.8rem;
}

.navbar-brand:hover {
    color: var(--accent-color) !important;
}

/* Main Content */
.main-content {
    padding: 2rem 0;
    min-height: calc(100vh - 200px);
}

/* Hero Section */
.hero-section {
    padding: 3rem 0;
    background: linear-gradient(135deg, rgba(0, 173, 181, 0.1), rgba(255, 211, 105, 0.1));
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
}

.hero-section h1 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

[data-theme="dark"] .hero-section h1 {
    color: var(--light-color);
}

.hero-section .lead {
    color: var(--secondary-color);
    opacity: 0.8;
}

[data-theme="dark"] .hero-section .lead {
    color: var(--light-color);
}

/* Card Styles */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    margin-bottom: 1.5rem;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    padding: 1rem 1.5rem;
}

.card-title {
    font-weight: 600;
    margin: 0;
}

.card-title i {
    margin-right: 0.5rem;
}

/* Form Styles */
.form-control,
.form-select {
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    padding: 0.75rem 1rem;
    transition: var(--transition);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 173, 181, 0.25);
}

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

[data-theme="dark"] .form-label {
    color: var(--light-color);
}

/* Button Styles */
.btn {
    border-radius: var(--border-radius);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    transform: translateY(-1px);
}

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

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

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

.btn-outline-secondary:hover {
    background: var(--secondary-color);
    color: white;
}

/* Results Section */
.results-section {
    animation: fadeInUp 0.5s ease;
}

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

.result-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border-left: 4px solid var(--primary-color);
}

[data-theme="dark"] .result-card {
    background: var(--secondary-color);
    color: var(--light-color);
}

.result-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.result-header {
    display: flex;
    justify-content: between;
    align-items: center;
    margin-bottom: 1rem;
}

.result-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin: 0;
}

[data-theme="dark"] .result-title {
    color: var(--light-color);
}

.result-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.result-delivery {
    color: var(--secondary-color);
    opacity: 0.8;
}

[data-theme="dark"] .result-delivery {
    color: var(--light-color);
}

.result-badge {
    background: var(--accent-color);
    color: var(--dark-color);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

/* Chart Styles */
.chart-container {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--box-shadow);
    margin-bottom: 1rem;
}

[data-theme="dark"] .chart-container {
    background: var(--secondary-color);
}

.chart-container h4 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    text-align: center;
}

[data-theme="dark"] .chart-container h4 {
    color: var(--light-color);
}

/* Tips Card */
.tips-card .list-unstyled li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #e9ecef;
}

[data-theme="dark"] .tips-card .list-unstyled li {
    border-bottom-color: #495057;
}

.tips-card .list-unstyled li:last-child {
    border-bottom: none;
}

/* FAQ Section */
.faq-section {
    padding: 3rem 0;
}

.accordion-button {
    font-weight: 600;
    color: var(--secondary-color);
}

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

.accordion-button:focus {
    box-shadow: 0 0 0 0.2rem rgba(0, 173, 181, 0.25);
}

/* Ad Banner Styles */
.ad-banner {
    background: #f8f9fa;
    border: 2px dashed #dee2e6;
    border-radius: var(--border-radius);
    padding: 1rem;
    text-align: center;
    margin: 1rem 0;
}

[data-theme="dark"] .ad-banner {
    background: var(--secondary-color);
    border-color: #495057;
}

.ad-banner::before {
    content: "Publicidade";
    display: block;
    font-size: 0.75rem;
    color: #6c757d;
    margin-bottom: 0.5rem;
}

/* Footer Styles */
.footer-section {
    background: var(--secondary-color);
    color: var(--light-color);
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-section a {
    color: var(--primary-color);
    text-decoration: none;
}

.footer-section a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

/* Loading Animation */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* Progress Bar */
.progress-custom {
    height: 8px;
    background-color: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-custom {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        padding: 2rem 0;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .btn {
        padding: 0.6rem 1rem;
    }
    
    .result-card {
        padding: 1rem;
    }
    
    .chart-container {
        padding: 1rem;
    }
    
    .navbar-brand span {
        display: none;
    }
}

@media (max-width: 576px) {
    .main-content {
        padding: 1rem 0;
    }
    
    .hero-section {
        padding: 1.5rem 0;
        margin-bottom: 1rem;
    }
    
    .hero-section h1 {
        font-size: 1.75rem;
    }
    
    .hero-section .lead {
        font-size: 1rem;
    }
    
    .card-header {
        padding: 0.75rem 1rem;
    }
    
    .result-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .result-price {
        font-size: 1.25rem;
    }
}

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

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

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #0066cc;
        --secondary-color: #000000;
        --accent-color: #ffcc00;
    }
}

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

/* Print Styles */
@media print {
    .header-section,
    .ad-banner,
    .btn,
    .offcanvas,
    .modal {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #000;
    }
    
    .results-section {
        page-break-inside: avoid;
    }
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

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

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

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--secondary-color);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--primary-color);
}