/**
 * PetAnxiety Relief - Stylesheet
 * Desenvolvido por B20 Conteúdo Digital
 * https://www.b20.com.br
 */

/* ========================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   ======================================== */
:root {
    /* Color Palette */
    --color-primary: #6F4E37;
    --color-primary-dark: #3C2415;
    --color-primary-light: #A67B5B;
    --color-accent: #C4915C;
    --color-background: #E6D5AA;
    
    /* Extended Colors */
    --color-white: #FFFFFF;
    --color-black: #1A1A1A;
    --color-gray-light: #F5F5F5;
    --color-gray: #CCCCCC;
    --color-gray-dark: #666666;
    
    /* Semantic Colors */
    --color-success: #4CAF50;
    --color-warning: #FF9800;
    --color-error: #F44336;
    --color-info: #2196F3;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-base: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-base: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-tooltip: 1070;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --color-background: #1A1A1A;
    --color-white: #1A1A1A;
    --color-black: #FFFFFF;
    --color-gray-light: #2A2A2A;
    --color-gray: #444444;
    --color-gray-dark: #CCCCCC;
    --color-primary: #A67B5B;
    --color-primary-dark: #C4915C;
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    overflow-x: hidden;
    overscroll-behavior: none;
    width: 100%;
    max-width: 100%;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-black);
    background-color: var(--color-background);
    min-height: 100vh;
    padding-bottom: 70px; /* Space for bottom nav */
}

/* ========================================
   TYPOGRAPHY
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary-dark);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--color-primary-accent);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

ul, ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
}

li {
    margin-bottom: var(--spacing-sm);
}

strong {
    font-weight: 600;
    color: var(--color-primary-dark);
}

/* ========================================
   LAYOUT
   ======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.main-content {
    padding: var(--spacing-xl) 0;
}

/* ========================================
   HEADER
   ======================================== */
.app-header {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
    box-shadow: var(--shadow-md);
    position: relative;
}

.header-content {
    text-align: center;
}

.app-title {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.app-title .icon {
    font-size: 2rem;
}

.app-subtitle {
    font-size: var(--font-size-lg);
    opacity: 0.95;
    font-weight: 400;
}

.theme-toggle {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--color-white);
    width: 30px;
    height: 30px;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    font-size: var(--font-size-lg);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.theme-toggle:focus {
    outline: 2px solid var(--color-white);
    outline-offset: 2px;
}

/* ========================================
   CARDS
   ======================================== */
.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-base);
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-background);
}

.card-icon {
    font-size: var(--font-size-3xl);
}

.card-body {
    color: var(--color-gray-dark);
}

/* ========================================
   CONTENT SECTIONS
   ======================================== */
.content-section {
    margin-bottom: var(--spacing-xxl);
}

.intro-section .card {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-accent) 100%);
    color: var(--color-white);
    text-align: center;
}

.intro-section h2,
.intro-section p {
    color: var(--color-white);
}

/* ========================================
   INFO BOXES
   ======================================== */
.info-box,
.warning-box,
.success-box {
    padding: var(--spacing-lg);
    border-radius: var(--radius-base);
    margin: var(--spacing-lg) 0;
    border-left: 4px solid;
}

.info-box {
    background: rgba(33, 150, 243, 0.1);
    border-color: var(--color-info);
}

.warning-box {
    background: rgba(255, 152, 0, 0.1);
    border-color: var(--color-warning);
}

.success-box {
    background: rgba(76, 175, 80, 0.1);
    border-color: var(--color-success);
}

.info-box h3,
.warning-box h3,
.success-box h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   SYMPTOMS GRID
   ======================================== */
.symptoms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.symptom-card {
    background: var(--color-gray-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-base);
    border-top: 4px solid var(--color-primary);
}

.symptom-card h3 {
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-md);
}

.symptom-card ul {
    list-style: none;
    padding-left: 0;
}

.symptom-card li {
    padding-left: var(--spacing-lg);
    position: relative;
    margin-bottom: var(--spacing-md);
}

.symptom-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* ========================================
   CAUSES LIST
   ======================================== */
.causes-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.cause-item {
    background: var(--color-gray-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-base);
    border-left: 4px solid var(--color-accent);
}

.cause-item h3 {
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-md);
}

.cause-item p {
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   TECHNIQUES GRID
   ======================================== */
.techniques-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.technique-card {
    background: var(--color-gray-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-base);
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.technique-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.technique-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.technique-card h3 {
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-md);
}

.technique-card ul {
    text-align: left;
    list-style: none;
    padding-left: 0;
}

.technique-card li {
    padding-left: var(--spacing-lg);
    position: relative;
    margin-bottom: var(--spacing-sm);
}

.technique-card li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

/* ========================================
   PROFESSIONAL HELP
   ======================================== */
.help-indicators {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.indicator {
    padding: var(--spacing-lg);
    border-radius: var(--radius-base);
    border-left: 4px solid;
}

.indicator.urgent {
    background: rgba(244, 67, 54, 0.1);
    border-color: var(--color-error);
}

.indicator.important {
    background: rgba(255, 152, 0, 0.1);
    border-color: var(--color-warning);
}

.professionals-info {
    margin-top: var(--spacing-xl);
}

.professional-type {
    background: var(--color-gray-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-base);
    margin-bottom: var(--spacing-lg);
}

.professional-type h4 {
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-md);
}

/* ========================================
   QUIZ STYLES
   ======================================== */
.quiz-intro {
    margin-bottom: var(--spacing-xl);
}

.quiz-info,
.quiz-disclaimer {
    padding: var(--spacing-lg);
    border-radius: var(--radius-base);
    margin-bottom: var(--spacing-md);
}

.quiz-info {
    background: rgba(33, 150, 243, 0.1);
    border-left: 4px solid var(--color-info);
}

.quiz-disclaimer {
    background: rgba(255, 152, 0, 0.1);
    border-left: 4px solid var(--color-warning);
}

.quiz-container {
    background: var(--color-gray-light);
    padding: var(--spacing-sm);
    border-radius: var(--radius-base);
}

.quiz-progress {
    margin-bottom: var(--spacing-xl);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-gray);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
    transition: width var(--transition-base);
    border-radius: var(--radius-full);
}

.progress-text {
    text-align: center;
    font-weight: 600;
    color: var(--color-primary-dark);
}

.question-block {
    background: var(--color-white);
    padding: var(--spacing-sm);
    border-radius: var(--radius-base);
    margin-bottom: var(--spacing-lg);
}

.question-block.active {
    display: block;
}

.question-block:not(.active) {
    display: none;
}

.question-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-lg);
}

.answers-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.answer-option {
    display: flex;
    align-items: center;
    padding: var(--spacing-lg);
    background: var(--color-gray-light);
    border: 2px solid transparent;
    border-radius: var(--radius-base);
    cursor: pointer;
    transition: all var(--transition-base);
}

.answer-option:hover {
    background: var(--color-background);
    border-color: var(--color-primary-light);
}

.answer-option input[type="radio"] {
    margin-right: var(--spacing-md);
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.answer-option input[type="radio"]:checked + label {
    font-weight: 600;
    color: var(--color-primary-dark);
}

.answer-option.selected {
    background: var(--color-background);
    border-color: var(--color-primary);
}

.answer-label {
    cursor: pointer;
    flex: 1;
}

.quiz-navigation {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-base);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    min-height: 44px;
}

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

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

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

.btn-secondary {
    background: var(--color-gray);
    color: var(--color-black);
}

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

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

.btn-success:hover {
    background: #45a049;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========================================
   QUIZ RESULTS
   ======================================== */
.quiz-results {
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    margin-top: var(--spacing-xl);
}

.result-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--color-background);
}

.result-level {
    font-size: var(--font-size-3xl);
    font-weight: bold;
    margin-bottom: var(--spacing-md);
}

.result-level.mild {
    color: var(--color-success);
}

.result-level.moderate {
    color: var(--color-warning);
}

.result-level.severe {
    color: var(--color-error);
}

.result-score {
    font-size: var(--font-size-xl);
    color: var(--color-gray-dark);
}

.result-description {
    background: var(--color-gray-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-base);
    margin-bottom: var(--spacing-xl);
}

.result-recommendations h3 {
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-lg);
}

.recommendation-item {
    background: var(--color-gray-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-base);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--color-primary);
}

.result-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--color-background);
}

/* ========================================
   FAQ SECTION
   ======================================== */
.faq-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.faq-item {
    background: var(--color-gray-light);
    border-radius: var(--radius-base);
    overflow: hidden;
    transition: box-shadow var(--transition-base);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: transparent;
    border: none;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary-dark);
    text-align: left;
    cursor: pointer;
    transition: background var(--transition-base);
    min-height: 44px;
}

.faq-question:hover {
    background: var(--color-background);
}

.faq-question:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}

.faq-icon {
    font-size: var(--font-size-2xl);
    font-weight: bold;
    color: var(--color-primary);
    transition: transform var(--transition-base);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-gray-dark);
}

.faq-answer[hidden] {
    display: none;
}

/* ========================================
   FOOTER
   ======================================== */
.app-footer {
    background: var(--color-primary-dark);
    color: var(--color-white);
    padding: var(--spacing-xxl) 0 var(--spacing-xl);
    margin-top: var(--spacing-xxl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    opacity: 0.9;
}

.footer-links {
    list-style: none;
    padding-left: 0;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--color-white);
    opacity: 0.9;
    transition: opacity var(--transition-base);
}

.footer-links a:hover {
    opacity: 1;
    text-decoration: underline;
}

.b20-link {
    color: var(--color-accent);
    font-weight: 600;
    transition: all var(--transition-base);
}

.b20-link:hover {
    color: var(--color-background);
    transform: scale(1.05);
    display: inline-block;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-bottom p {
    margin-bottom: var(--spacing-sm);
    opacity: 0.8;
}

.footer-disclaimer {
    font-size: var(--font-size-sm);
    opacity: 0.7;
}

/* ========================================
   BOTTOM NAVIGATION
   ======================================== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-white);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) 0;
    z-index: var(--z-sticky);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    color: var(--color-gray-dark);
    text-decoration: none;
    transition: all var(--transition-base);
    min-width: 60px;
    min-height: 44px;
}

.nav-item i {
    font-size: var(--font-size-xl);
}

.nav-item span {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.nav-item:hover,
.nav-item.active {
    color: var(--color-primary);
    transform: translateY(-2px);
}

.nav-item:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

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

.text-center {
    text-align: center;
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* Mobile First - Base styles above are for mobile */

/* Tablet: 768px and up */
@media (min-width: 768px) {
    :root {
        --font-size-base: 1.0625rem;
    }
    
    .container {
        padding: 0 var(--spacing-xl);
    }
    
    .app-title {
        font-size: 2.5rem;
    }
    
    .quiz-navigation {
        justify-content: flex-end;
    }
    
    .btn {
        min-width: 120px;
    }
}

/* Desktop: 1024px and up */
@media (min-width: 1024px) {
    .main-content {
        padding: var(--spacing-xxl) 0;
    }
    
    .card {
        padding: var(--spacing-xxl);
    }
    
    .bottom-nav {
        display: none;
    }
    
    body {
        padding-bottom: 0;
    }
}

/* Large Desktop: 1440px and up */
@media (min-width: 1440px) {
    .container {
        max-width: 1400px;
    }
}

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
    .app-header,
    .bottom-nav,
    .theme-toggle,
    .quiz-navigation,
    .result-actions {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn var(--transition-base) ease-out;
}

/* ========================================
   ACCESSIBILITY ENHANCEMENTS
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus visible for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-primary: #000000;
        --color-background: #FFFFFF;
    }
}