/* Root Variables */
:root {
    --primary-color: #05386B;
    --secondary-color: #379683;
    --accent-color: #5CDB95;
    --light-accent: #8EE4AF;
    --background-light: #EDF5E1;
    --text-dark: #2c3e50;
    --border-radius: 12px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --bs-body-bg: #1a1a1a;
    --bs-body-color: #ffffff;
    --bs-card-bg: #2d2d2d;
    --bs-border-color: #404040;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    transition: var(--transition);
}

/* Custom Bootstrap Overrides */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    border-radius: var(--border-radius);
    font-weight: 600;
    padding: 12px 24px;
    transition: var(--transition);
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

.btn-success {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--primary-color);
    font-weight: 600;
}

.btn-success:hover {
    background-color: var(--light-accent);
    border-color: var(--light-accent);
    color: var(--primary-color);
}

.card {
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: none;
    transition: var(--transition);
}

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

.form-control, .form-select {
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    padding: 12px 16px;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.2rem rgba(92, 219, 149, 0.25);
}

/* Navigation */
.navbar {
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.nav-link {
    font-weight: 500;
    color: var(--text-dark) !important;
    transition: var(--transition);
}

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

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--background-light) 0%, rgba(92, 219, 149, 0.1) 100%);
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.hero-image {
    text-align: center;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* Calculator Section */
.calculation-section {
    transition: var(--transition);
}

.btn-check:checked + .btn-outline-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Results Section */
.result-card {
    background: linear-gradient(135deg, #ffffff 0%, var(--background-light) 100%);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.result-card:hover {
    transform: scale(1.05);
}

.equivalence-card {
    background: #f8f9fa;
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    transition: var(--transition);
}

.equivalence-card:hover {
    border-color: var(--accent-color);
    background: rgba(92, 219, 149, 0.1);
}

/* Progress Bar */
.progress {
    border-radius: var(--border-radius);
    overflow: hidden;
}

.progress-bar {
    transition: width 1s ease-in-out;
}

/* Impact Level Badges */
.impact-low {
    background-color: var(--accent-color);
    color: var(--primary-color);
}

.impact-medium {
    background-color: #ffc107;
    color: #000;
}

.impact-high {
    background-color: #dc3545;
    color: #fff;
}

/* FAQ Section */
.accordion-button {
    font-weight: 600;
    color: var(--primary-color);
}

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

.accordion-button:focus {
    box-shadow: 0 0 0 0.25rem rgba(92, 219, 149, 0.25);
}

/* Educational Content */
.fact-card {
    background: linear-gradient(135deg, var(--background-light) 0%, rgba(142, 228, 175, 0.3) 100%);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--accent-color);
    transition: var(--transition);
}

.fact-card:hover {
    transform: translateX(5px);
    box-shadow: var(--box-shadow);
}

.list-group-item {
    border-radius: var(--border-radius) !important;
    margin-bottom: 8px;
    border: 2px solid #e9ecef;
    transition: var(--transition);
}

.list-group-item:hover {
    background-color: var(--background-light);
    border-color: var(--accent-color);
}

/* Modal Customizations */
.modal-content {
    border-radius: var(--border-radius);
    border: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.modal-header {
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

/* Offcanvas */
.offcanvas {
    width: 400px !important;
}

@media (max-width: 768px) {
    .offcanvas {
        width: 100% !important;
    }
}

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

[data-theme="dark"] .result-card {
    background: linear-gradient(135deg, #2d2d2d 0%, #404040 100%);
}

[data-theme="dark"] .equivalence-card {
    background: #404040;
    border-color: #555;
}

[data-theme="dark"] .fact-card {
    background: linear-gradient(135deg, #404040 0%, #555 100%);
}

[data-theme="dark"] .hero-section {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
}

[data-theme="dark"] .navbar {
    background-color: #2d2d2d !important;
}

[data-theme="dark"] .navbar-light .navbar-brand,
[data-theme="dark"] .navbar-light .nav-link {
    color: #ffffff !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        min-height: 50vh;
        text-align: center;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .btn-lg {
        padding: 10px 20px;
        font-size: 1rem;
    }
    
    .result-card {
        margin-bottom: 1rem;
    }
    
    .equivalence-card {
        margin-bottom: 1rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding-left: 15px;
        padding-right: 15px;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .hero-section .lead {
        font-size: 1rem;
    }
    
    .btn-group .btn {
        font-size: 0.875rem;
        padding: 8px 12px;
    }
    
    .display-4 {
        font-size: 1.5rem;
    }
    
    .card-header h2,
    .card-header h3 {
        font-size: 1.25rem;
    }
}

/* 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-in-left {
    animation: slideInLeft 0.5s ease-out;
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

.slide-in-right {
    animation: slideInRight 0.5s ease-out;
}

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

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

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

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-custom {
    box-shadow: 0 10px 30px rgba(5, 56, 107, 0.1);
}

.border-custom {
    border: 2px solid var(--accent-color);
}

/* Print Styles */
@media print {
    .navbar,
    .btn,
    .modal,
    .offcanvas,
    footer {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    h1, h2, h3, h4, h5, h6 {
        page-break-after: avoid;
    }
    
    .result-card,
    .equivalence-card {
        page-break-inside: avoid;
    }
}

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

.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;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000000;
        --secondary-color: #333333;
        --accent-color: #006600;
        --text-dark: #000000;
    }
    
    .btn, .card, .form-control, .form-select {
        border-width: 2px;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .hero-image {
        animation: none;
    }
}

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

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

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

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

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

.ad-container::before {
    content: "Publicidade";
    display: block;
    font-size: 0.75rem;
    color: #6c757d;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Mobile-specific styles */
@media (max-width: 767px) {
    .hero-section {
        padding: 2rem 0;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .btn-group {
        flex-direction: column;
    }
    
    .btn-group .btn {
        border-radius: var(--border-radius);
        margin-bottom: 0.5rem;
    }
    
    .result-card .display-4 {
        font-size: 2rem;
    }
    
    .equivalence-card {
        margin-bottom: 1rem;
    }
    
    .modal-dialog {
        margin: 1rem;
    }
}

/* Tablet styles */
@media (min-width: 768px) and (max-width: 991px) {
    .hero-section {
        padding: 3rem 0;
    }
    
    .card-body {
        padding: 2rem;
    }
}

/* Desktop styles */
@media (min-width: 992px) {
    .hero-section {
        padding: 4rem 0;
    }
    
    .card-body {
        padding: 2.5rem;
    }
    
    .result-card:hover {
        transform: scale(1.02);
    }
}