:root {
    --primary-color: #2E7D32; /* Verde Escuro (ODS 13) */
    --secondary-color: #E65100; /* Laranja (ODS 11) */
    --accent-color: #B08D57; /* Marrom/Dourado (ODS 12) */
    --text-color: #333;
    --background-light: #f9f9f9;
    --background-dark: #212121;
    --text-light: #f4f4f4;
    --font-family: 'Poppins', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1100px;
    margin: auto;
    padding: 0 2rem;
    overflow: hidden;
}

/* --- Header e Navegação --- */
header {
    background: rgba(33, 33, 33, 0.8);
    color: var(--text-light);
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    transition: background-color 0.3s ease;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    height: 70px;
}

nav .logo {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.5rem;
}

nav .nav-links {
    display: flex;
    list-style: none;
}

nav .nav-links li {
    padding: 0 1rem;
}

nav .nav-links a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 600;
    position: relative;
    transition: color 0.3s;
}

nav .nav-links a::after {
    content: '';
    display: block;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: width .3s;
    position: absolute;
    bottom: -5px;
    left: 0;
}

nav .nav-links a:hover, nav .nav-links a:focus {
    color: var(--secondary-color);
}

nav .nav-links a:hover::after, nav .nav-links a:focus::after {
    width: 100%;
}

.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: var(--text-light);
    margin: 5px;
    transition: all 0.3s ease;
}

/* --- Seção Hero --- */
.hero-section {
    height: 100vh;
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('https://images.unsplash.com/photo-1582408921715-18e7806365c1?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=MnwzNTc5fDB8MXxzZWFyY2h8N3x8cmVjeWNsaW5nJTIwcGxhbnR8ZW58MHx8fHwxNjE5MjA2NjU5&ixlib=rb-1.2.1&q=80&w=1920') no-repeat center center/cover;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
    padding: 0 1rem;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.7);
}

.hero-content p {
    font-size: 1.3rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.cta-button {
    background: var(--secondary-color);
    color: #fff;
    padding: 1rem 2.5rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    transition: background-color 0.3s, transform 0.3s;
}

.cta-button:hover {
    background-color: #FF6D00;
    transform: translateY(-3px);
}

/* --- Seções de Conteúdo --- */
.content-section, .content-section-dark {
    padding: 6rem 0;
}

.content-section-dark {
    background-color: var(--background-dark);
    color: var(--text-light);
}

.content-section h2, .content-section-dark h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.content-section h2::after, .content-section-dark h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-color);
}
.content-section-dark h2::after {
     background: var(--secondary-color);
}

.subtitle {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3rem auto;
    font-size: 1.1rem;
    color: #666;
}

.content-section-dark .subtitle {
    color: #ccc;
}


/* --- Grid de Cards (Seção Coleta) --- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.card {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* --- Grid de Cores (Seção Cores) --- */
.color-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.color-item {
    padding: 1.5rem;
    border-radius: 8px;
    color: #fff;
    font-weight: 600;
    text-align: center;
    background-color: var(--color, #333);
    transition: transform 0.3s;
}

.color-item:hover {
    transform: scale(1.05);
}

/* --- Seção Importância --- */
.benefits-container {
    display: flex;
    justify-content: space-around;
    gap: 3rem;
    margin-top: 3rem;
}

.benefit-item {
    text-align: center;
    max-width: 350px;
}

.benefit-item ion-icon {
    font-size: 3.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* --- Grid ODS (Seção Projeto) --- */
.ods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.ods-card {
    background: #333;
    border-radius: 15px;
    overflow: hidden;
    transition: transform 0.3s;
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.ods-card:hover {
    transform: translateY(-10px);
}

.ods-card img {
    width: 100%;
    height: 200px;
    object-fit: contain; /* <-- ESTA É A ÚNICA ALTERAÇÃO FEITA */
    display: block;
}

.ods-card h3 {
    color: var(--secondary-color);
    margin: 1.5rem;
}

.ods-card p {
    margin: 0 1.5rem 1.5rem 1.5rem;
    font-size: 0.95rem;
    color: #ddd;
}

/* --- Animação de Fade In --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}


/* --- Footer --- */
footer {
    background: #1a1a1a;
    color: #aaa;
    text-align: center;
    padding: 2rem 0;
}


/* --- Responsividade --- */
@media screen and (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }

    nav .nav-links {
        position: absolute;
        right: 0px;
        height: 92vh;
        top: 70px;
        background: rgba(33, 33, 33, 0.98);
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 50%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
    }
    
    .nav-links.nav-active {
        transform: translateX(0%);
    }

    nav .nav-links li {
        opacity: 0;
        padding: 2rem 0;
    }

    .burger {
        display: block;
    }

    .benefits-container {
        flex-direction: column;
        align-items: center;
    }
}

/* Animação dos links do menu hamburguer */
@keyframes navLinkFade {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0px);
    }
}

/* Classe para o "X" do menu hamburguer */
.toggle .line1 {
    transform: rotate(-45deg) translate(-5px, 6px);
}
.toggle .line2 {
    opacity: 0;
}
.toggle .line3 {
    transform: rotate(45deg) translate(-5px, -6px);
}