:root {
    /* Nova paleta de cores com tons de verde e preto */
    --color-primary: #1b5e20;         /* Verde escuro */
    --color-primary-dark: #003300;    /* Verde mais escuro */
    --color-primary-light: #4c8c4a;   /* Verde mais claro */
    --color-secondary: #212121;       /* Preto */
    --color-secondary-dark: #000000;  /* Preto mais escuro */
    --color-accent: #ffffff;          /* Branco */
    
    /* Cores de fundo */
    --bg-dark: #212121;               /* Preto acinzentado */
    --bg-light: #f8f8f8;              /* Branco suave */
    --bg-card: #ffffff;
    
    /* Cores de texto */
    --text-light: #ffffff;
    --text-dark: #212121;             /* Preto */
    --text-muted: #757575;            /* Cinza */
    
    /* Configurações de design */
    --transition: 0.3s ease;
    --radius: 12px;
    --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 15px 30px rgba(0, 0, 0, 0.15);
    --width-container: 1200px;
    
    /* Sistema de espaçamento mais consistente (múltiplos de 4) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 48px;
    --space-8: 64px;
    
    /* Sistema tipográfico */
    --font-size-xs: 0.75rem;   /* 12px */
    --font-size-sm: 0.875rem;  /* 14px */
    --font-size-md: 1rem;      /* 16px */
    --font-size-lg: 1.125rem;  /* 18px */
    --font-size-xl: 1.25rem;   /* 20px */
    --font-size-2xl: 1.5rem;   /* 24px */
    --font-size-3xl: 2rem;     /* 32px */
    --font-size-4xl: 2.5rem;   /* 40px */
}

/* Reset moderno */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ====== COMPONENTES REUTILIZÁVEIS ====== */
[class*="button"], 
[class*="card"] {
    transition: transform var(--transition), box-shadow var(--transition);
}

.button {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
}

section {
    padding: var(--space-xl) 0;
}

/* Melhorias de acessibilidade para textos */
html {
    font-size: 100%;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
    font-size: var(--font-size-md);
    font-weight: 400;
    overflow-x: hidden;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Container responsivo */
.container {
    width: 100%;
    max-width: var(--width-container);
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* Header e navegação otimizados - Verde escuro */
.header-container {
    background-color: var(--color-primary);
    color: var(--text-light);
    padding: var(--space-5) var(--space-4);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--width-container);
    margin: 0 auto;
}

.header-container h1 {
    margin: 0;
    font-weight: 700;
    font-size: var(--font-size-3xl);
    letter-spacing: -0.5px;
}

/* Botão de menu com melhor acessibilidade */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--space-2);
    transition: opacity var(--transition);
}

.mobile-menu-btn:hover {
    opacity: 0.8;
}

/* Navegação com melhor transição */
nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 30px;
    padding: 0;
    margin: 0;
}

nav ul li a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 600;
    position: relative;
    transition: color var(--transition);
    padding: var(--space-2) 0;
}

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--text-light);
    transition: width var(--transition);
}

nav ul li a:hover {
    color: rgba(255, 255, 255, 0.9);
}

nav ul li a:hover::after,
nav ul li a:focus::after {
    width: 100%;
}

/* Hero section com gradiente otimizado - Verde com preto */
.hero-section {
    background: linear-gradient(rgba(27, 94, 32, 0.85), rgba(0, 0, 0, 0.75)), 
                url('https://source.unsplash.com/random/1600x900?car');
    background-size: cover;
    background-position: center;
    color: var(--text-light);
    text-align: center;
    padding: var(--space-7) var(--space-4);
    position: relative;
    margin-bottom: var(--space-7);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-section h2 {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-4xl));
    margin-bottom: var(--space-5);
    font-weight: 700;
    line-height: 1.2;
}

.hero-section p {
    max-width: 700px;
    margin: 0 auto var(--space-5);
    font-size: clamp(var(--font-size-md), 2vw, var(--font-size-lg));
    opacity: 0.9;
}

/* Sistema de botões aprimorado - Preto para botões principais */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    padding: 12px 25px;
    font-weight: 600;
    border-radius: var(--radius);
    transition: all var(--transition);
    text-align: center;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: var(--font-size-md);
    line-height: 1.5;
}

.btn-primary {
    background-color: var(--color-secondary);
    color: var(--text-light);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--color-secondary-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.btn-whatsapp {
    background-color: var(--color-primary);
    color: white;
    box-shadow: 0 4px 6px rgba(27, 94, 32, 0.2);
}

.btn-whatsapp:hover,
.btn-whatsapp:focus {
    background-color: var(--color-primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(27, 94, 32, 0.3);
}

/* Grid de categorias otimizado */
.categories-section {
    padding: var(--space-7) var(--space-4);
    background-color: var(--bg-light);
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-7);
    position: relative;
}

.section-title h2 {
    color: var(--text-dark);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background-color: var(--color-primary);
    margin: var(--space-2) auto 0;
}

.categories-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Cards com melhor performance de animação - Sombra mais esverdeada */
.category-card {
    background-color: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(27, 94, 32, 0.08);
    transition: transform var(--transition), box-shadow var(--transition);
    cursor: pointer;
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
    will-change: transform, box-shadow;
}

.category-card:hover,
.category-card:focus-within {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(27, 94, 32, 0.15);
    border-bottom: 3px solid var(--color-secondary);
}

.category-img {
    width: 100%;
    height: 180px;
    overflow: hidden;
}

.category-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
    will-change: transform;
    aspect-ratio: 16/9;
}

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

.category-content {
    padding: var(--space-5);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.category-card h3 {
    margin: 0;
    font-size: var(--font-size-xl);
    color: var(--text-dark);
    font-weight: 600;
}

/* Feedbacks com melhor contraste - Fundo verde */
.feedbacks-section {
    padding: var(--space-7) var(--space-4);
    background-color: var(--color-primary);
    color: var(--text-light);
}

.feedbacks-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    max-width: var(--width-container);
    margin: 0 auto;
}

.feedback-card {
    background-color: var(--bg-card);
    padding: var(--space-5);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
    will-change: transform, box-shadow;
    color: var(--text-dark);
    border-left: 4px solid var(--color-secondary);
}

.feedback-card::before {
    content: '"';
    position: absolute;
    top: 15px;
    left: 15px;
    font-size: 4rem;
    font-family: Georgia, serif;
    color: var(--color-primary);
    opacity: 0.2;
    line-height: 1;
}

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

.feedback-text {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-4);
    color: var(--text-dark);
    position: relative;
    z-index: 1;
    padding-top: var(--space-4);
    flex-grow: 1;
}

.feedback-author {
    font-weight: 600;
    color: var(--color-primary);
    margin-top: auto;
    display: flex;
    align-items: center;
}

.more-link {
    margin-top: var(--space-7);
    text-align: center;
}

.btn-more {
    background-color: transparent;
    color: var(--text-light);
    border: 2px solid var(--text-light);
    padding: 10px 25px;
    border-radius: var(--radius);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition);
    display: inline-block;
}

.btn-more:hover,
.btn-more:focus {
    background-color: var(--text-light);
    color: var(--color-primary);
    transform: translateY(-3px);
}

/* Seção de contato - Fundo mais claro */
.contact-section {
    padding: var(--space-7) var(--space-4);
    background-color: var(--bg-light);
    text-align: center;
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-section h2 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-4);
    color: var(--text-dark);
}

.contact-section p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-5);
    color: var(--text-muted);
}

/* WhatsApp flutuante com cor verde */
.whatsapp-icon {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 100;
    width: 60px;
    height: 60px;
    background-color: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
    text-decoration: none;
}

.whatsapp-icon i {
    font-size: 30px;
}

.whatsapp-icon:hover,
.whatsapp-icon:focus {
    transform: scale(1.1) translateY(-5px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.25);
    outline: none;
}

/* Footer com preto */
footer {
    background-color: var(--bg-dark);
    color: var(--text-light);
    padding: var(--space-7) var(--space-4);
}

.footer-content {
    max-width: var(--width-container);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-5);
}

.footer-info {
    margin-top: var(--space-4);
}

.footer-info strong {
    color: var(--color-primary-light);
    font-weight: 600;
}

footer p {
    margin: var(--space-2) 0;
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

footer a {
    color: var(--color-primary-light);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition);
}

footer a:hover,
footer a:focus {
    color: var(--text-light);
    text-decoration: underline;
}

/* Media queries otimizados */
@media screen and (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        text-align: center;
    }
    
    .header-container h1 {
        margin-bottom: var(--space-4);
    }
    
    .mobile-menu-btn {
        display: block;
        position: absolute;
        top: var(--space-4);
        right: var(--space-4);
    }
    
    nav {
        width: 100%;
        display: none; /* Implementar toggle com JS */
    }
    
    nav.active {
        display: block;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
        gap: var(--space-4);
        padding: var(--space-4) 0;
    }
    
    .categories-container,
    .feedbacks-container {
        grid-template-columns: 1fr;
        max-width: 450px;
        margin: 0 auto;
    }
    
    .hero-section {
        padding: var(--space-7) var(--space-4);
    }
    
    .btn {
        display: block;
        width: 100%;
        max-width: 300px;
        margin: 0 auto var(--space-4) auto;
    }
}

@media screen and (min-width: 769px) and (max-width: 1024px) {
    .categories-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feedbacks-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Melhorias de acessibilidade */
:focus-visible {
    outline: 3px solid var(--color-primary);
    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-width: 0;
}

/* Animações otimizadas para performance */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fadeIn {
    animation: fadeIn 0.5s ease-out forwards;
    will-change: opacity, transform;
}

/* Dark mode melhorado */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-light: #121212;
        --bg-card: #1e1e1e;
        --text-dark: #e0e0e0;
        --text-muted: #b0b0b0;
        --shadow-color: rgba(0, 0, 0, 0.3);
        --shadow-hover: rgba(0, 0, 0, 0.4);
    }
    
    .btn-more {
        color: var(--text-light);
        border-color: var(--text-light);
    }
    
    .feedback-card {
        background-color: #1e1e1e;
    }
    
    .section-title h2 {
        color: var(--text-light);
    }
    
    .category-card h3 {
        color: var(--text-light);
    }
}

/* Utilitários */
.text-center { text-align: center; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }

/* Impressão */
@media print {
    .whatsapp-icon,
    .btn {
        display: none !important;
    }
    
    body {
        background-color: white;
        color: black;
    }
    
    .container {
        width: 100%;
        max-width: 100%;
    }
}