/* ============================================
   PERIFÉRICOS ESSENCIAIS - STYLESHEET
   Site de Afiliados com Tema Claro/Escuro
   ============================================ */

/* ========================================
   SUMÁRIO:
   1. Variáveis CSS
   2. Reset e Base
   3. Layout Geral
   4. Header e Navegação
   5. Seções de Conteúdo
   6. Cards de Produtos
   7. Carrossel de Imagens
   8. Botões e CTAs
   9. Tabela Comparativa
   10. FAQ
   11. Tema Escuro (Dark Mode)
   12. Responsividade Mobile
   13. Animações e Transições
   ======================================== */

/* ========================================
   1. VARIÁVEIS CSS
   ======================================== */
:root {
    /* Cores - Tema Claro */
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --success-color: #27ae60;

    /* Backgrounds */
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f8f9ff;

    /* Textos */
    --text-primary: #333333;
    --text-secondary: #ffffff;
    --text-muted: #f0f0f0;

    /* Bordas e Sombras */
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 5px 15px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.15);

    /* Espaçamentos */
    --spacing-xs: 8px;
    --spacing-sm: 15px;
    --spacing-md: 25px;
    --spacing-lg: 40px;
    --spacing-xl: 60px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 15px;
    --radius-xl: 20px;

    /* Transições */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Carrossel */
    --carousel-height: 280px;
}

/* Variáveis - Tema Escuro */
:root[data-theme="dark"] {
    /* Backgrounds */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;

    /* Textos */
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;

    /* Bordas e Sombras */
    --border-color: #404040;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 5px 15px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.5);
}

/* ========================================
   2. RESET E BASE
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-base),
                color var(--transition-base);
}

img {
    max-width: 100%;
    height: auto;
}

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

a:hover {
    color: var(--secondary-color);
}

/* ========================================
   3. LAYOUT GERAL
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* ========================================
   4. TIPOGRAFIA
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: bold;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

h1 {
    font-size: var(--font-size-4xl);
    color: var(--secondary-color);
}

h2 {
    font-size: var(--font-size-3xl);
    color: var(--secondary-color);
    margin-top: var(--spacing-lg);
}

h3 {
    font-size: var(--font-size-2xl);
    color: var(--secondary-color);
}

.subtitle {
    font-style: italic;
    color: var(--light-text);
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   5. CARDS
   ======================================== */
.card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.product-card {
    position: relative;
    border: 2px solid transparent;
    transition: var(--transition);
}

.product-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.product-image {
    width: 100%;
    height: 200px;
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.product-specs {
    margin: var(--spacing-sm) 0;
}

.spec-item {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.spec-item::before {
    content: "✓";
    color: var(--success-color);
    font-weight: bold;
    margin-right: var(--spacing-xs);
}

.product-price {
    background: var(--bg-tertiary);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: bold;
    font-size: var(--font-size-xl);
    color: var(--accent-color);
    margin: var(--spacing-sm) 0;
}

.product-description {
    margin: var(--spacing-sm) 0;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ========================================
   6. BOTÕES E CTAS
   ======================================== */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-color), #c0392b);
    color: white;
}

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

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

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

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-lg);
}

/* ========================================
   7. NAVEGAÇÃO E BREADCRUMBS
   ======================================== */
.breadcrumbs {
    background: var(--bg-secondary);
    padding: var(--spacing-sm) 0;
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-primary);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.breadcrumbs a {
    color: var(--text-secondary);
}

.breadcrumbs span {
    color: var(--text-primary);
}

.breadcrumb-separator {
    margin: 0 var(--spacing-xs);
    color: var(--text-secondary);
}

.toc {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.toc ul {
    list-style: none;
}

.toc li {
    margin-bottom: var(--spacing-xs);
}

.toc a {
    color: var(--primary-color);
    font-weight: 500;
}

/* ========================================
   8. TABELA COMPARATIVA
   ======================================== */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background: var(--secondary-color);
    color: white;
    font-weight: bold;
}

.comparison-table tr:nth-child(even) {
    background: var(--bg-color);
}

/* ========================================
   9. FAQ
   ======================================== */
.faq {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    padding: var(--spacing-md);
    background: var(--bg-color);
    cursor: pointer;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: "+";
    font-size: var(--font-size-xl);
    font-weight: bold;
}

.faq-item.active .faq-question::after {
    content: "−";
}

.faq-answer {
    padding: 0 var(--spacing-md) var(--spacing-md);
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

/* ========================================
   10. CARROSSEL DE IMAGENS - VERSÃO FUNCIONAL
   ======================================== */
.product-carousel {
    position: relative;
    width: 100%;
    height: var(--carousel-height);
    background: #f8f9fa;
    overflow: hidden;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.carousel-track {
    display: flex;
    transition: transform var(--transition-speed) cubic-bezier(0.4, 0, 0.2, 1);
    height: 100%;
    width: 100%;
    position: relative;
}

.carousel-image {
    min-width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0;
    transition: opacity var(--transition-speed);
    flex-shrink: 0;
}

.carousel-image.active {
    opacity: 1;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    cursor: pointer;
    z-index: 10;
    font-size: 18px;
    font-weight: bold;
}

.carousel-btn:hover {
    background: rgba(0, 0, 0, 0.8);
}

.carousel-btn.prev {
    left: 15px;
}

.carousel-btn.next {
    right: 15px;
}

.carousel-btn.prev::before {
    content: "‹";
}

.carousel-btn.next::before {
    content: "›";
}

.carousel-indicators {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.indicator {
    width: 8px;
    height: 8px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.6);
    cursor: pointer;
    padding: 0;
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.9);
}

.indicator.active {
    background: var(--accent-color);
    width: 24px;
    border-radius: 4px;
}

.carousel-counter {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    z-index: 10;
}

.carousel-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    background: var(--bg-color);
    color: var(--light-text);
    font-size: var(--font-size-sm);
    text-align: center;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
}

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

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

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

.section {
    margin: var(--spacing-xl) 0;
}

/* ========================================
   11. AFILIADOS
   ======================================== */
.affiliate-btn {
    position: relative;
}

.affiliate-btn::before {
    content: "🔗";
    margin-right: var(--spacing-xs);
}

/* ========================================
   12. TEMA ESCURO (DARK MODE)
   ======================================== */

/* Botão Toggle de Tema */
.theme-toggle-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid var(--border-primary);
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px var(--shadow-primary);
    cursor: pointer;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 9999;
    user-select: none;
}

.theme-toggle-btn:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 6px 20px var(--shadow-primary);
}

.theme-toggle-btn:active {
    transform: scale(0.95);
}

/* Animação do ícone ao trocar */
@keyframes iconSwap {
    0% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(0.8); }
    100% { transform: rotate(360deg) scale(1); }
}

.theme-toggle-btn.switching {
    animation: iconSwap 0.6s ease;
}

/* Ajustes específicos do tema escuro */
:root[data-theme="dark"] .product-carousel {
    background: var(--bg-tertiary);
}

:root[data-theme="dark"] .carousel-btn {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
}

:root[data-theme="dark"] .carousel-btn:hover {
    background: rgba(255, 255, 255, 0.25);
}

:root[data-theme="dark"] .carousel-indicators {
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
    border-radius: 20px;
    padding: 5px;
}

:root[data-theme="dark"] .carousel-counter {
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
}

/* ==================================================
 * SEÇÃO COMPARATIVA - CORREÇÃO DEFINITIVA
 * ================================================== */

/* ========== TEMA CLARO (Light Mode) ========== */

#comparativo,
.comparison-section {
    background: #ffffff !important;
    color: #333333 !important;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.comparison-table {
    background: #ffffff !important;
    color: #333333 !important;
}

.comparison-table thead th {
    background: #f8f9fa !important;
    color: #2c3e50 !important;
    border-bottom: 2px solid #dee2e6 !important;
}

.comparison-table tbody td {
    background: #ffffff !important;
    color: #333333 !important;
    border-bottom: 1px solid #eee !important;
}

.comparison-table tbody tr {
    background: #ffffff !important;
}

.comparison-table tbody tr:hover {
    background: #f8f9ff !important;
}

.comparison-table tbody tr:hover td {
    background: #f8f9ff !important;
}

/* ========== TEMA ESCURO (Dark Mode) ========== */

:root[data-theme="dark"] #comparativo,
:root[data-theme="dark"] .comparison-section {
    background: #2d2d2d !important;
    color: #e0e0e0 !important;
}

:root[data-theme="dark"] .faq {
    background: #2d2d2d !important;
    color: #e0e0e0 !important;
}

:root[data-theme="dark"] .comparison-table {
    background: #2d2d2d !important;
    color: #e0e0e0 !important;
}

:root[data-theme="dark"] .comparison-table thead th {
    background: #3a3a3a !important;
    color: #ffffff !important;
    border-bottom: 2px solid #404040 !important;
}

:root[data-theme="dark"] .comparison-table tbody td {
    background: #2d2d2d !important;
    color: #e0e0e0 !important;
    border-bottom: 1px solid #404040 !important;
}

:root[data-theme="dark"] .comparison-table tbody tr {
    background: #2d2d2d !important;
    color: #e0e0e0 !important;
}

:root[data-theme="dark"] .comparison-table tbody tr:hover {
    background: #2d2d2d !important; /* Mesma cor, SEM mudança */
}

:root[data-theme="dark"] .comparison-table tbody tr:hover td {
    background: #2d2d2d !important; /* Mesma cor, SEM mudança */
}

:root[data-theme="dark"] .comparison-table strong {
    color: #ffffff !important;
}

:root[data-theme="dark"] .comparison-table th strong {
    color: #ffffff !important;
}

:root[data-theme="dark"] #comparativo h2,
:root[data-theme="dark"] .comparison-section h2 {
    color: #ffffff !important;
}

:root[data-theme="dark"] .comparison-table caption {
    color: #e0e0e0 !important;
}

:root[data-theme="dark"] .faq-question {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

:root[data-theme="dark"] .faq-answer {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

:root[data-theme="dark"] .btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-primary);
}

:root[data-theme="dark"] .btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

:root[data-theme="dark"] h1,
:root[data-theme="dark"] h2,
:root[data-theme="dark"] h3 {
    color: #ffffff;
}

:root[data-theme="dark"] .subtitle {
    color: var(--text-secondary);
}

:root[data-theme="dark"] .spec-item {
    color: var(--text-primary);
}

/* ========================================
   13. RESPONSIVIDADE MOBILE
   ======================================== */
@media (max-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    h1 {
        font-size: var(--font-size-3xl);
    }

    h2 {
        font-size: var(--font-size-2xl);
    }

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .comparison-table {
        font-size: var(--font-size-sm);
    }

    .comparison-table th,
    .comparison-table td {
        padding: var(--spacing-xs);
    }

    /* Responsivo para tema toggle */
    .theme-toggle-btn {
        top: 15px;
        right: 15px;
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .product-image {
        height: 150px;
    }

    .btn {
        width: 100%;
        margin-bottom: var(--spacing-xs);
    }
}