:root {
    --verde-escuro: #1b3d18;
    --verde-claro: #a8e063;
    --branco: #ffffff;
    --cinza-fundo: #f4f7f1;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', sans-serif; }

html { scroll-behavior: smooth; }

body { background-color: var(--cinza-fundo); color: #333; line-height: 1.6; }

/* Navegação */
header {
    background: var(--verde-escuro);
    color: white;
    padding: 20px 5%;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    transition: 0.4s;
}

nav { display: flex; justify-content: space-between; align-items: center; }

.logo { font-size: 1.5rem; font-weight: bold; }
.logo span { color: var(--verde-claro); }

nav ul { display: flex; list-style: none; }
nav ul li { margin-left: 20px; }
nav ul li a { color: white; text-decoration: none; font-weight: 500; transition: 0.3s; }
nav ul li a:hover { color: var(--verde-claro); }

/* Hero Section */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), 
                url('https://images.unsplash.com/photo-1500382017468-9049fed747ef?auto=format&fit=crop&w=1600');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.hero-text h1 { font-size: 3.5rem; margin-bottom: 20px; }

.btn-principal {
    display: inline-block;
    padding: 15px 40px;
    background: var(--verde-claro);
    color: var(--verde-escuro);
    text-decoration: none;
    font-weight: bold;
    border-radius: 30px;
    margin-top: 20px;
    transition: 0.3s;
}

.btn-principal:hover { transform: scale(1.05); background: #96d152; }

/* Pilares */
#pilares { padding: 100px 5%; }
.secao-titulo { text-align: center; font-size: 2.5rem; color: var(--verde-escuro); margin-bottom: 50px; }

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.card {
    background: white;
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    transition: 0.4s;
}

.card:hover { transform: translateY(-10px); border-bottom: 4px solid var(--verde-claro); }

.card .icon { font-size: 3rem; margin-bottom: 20px; display: block; }

.card h3 { color: var(--verde-escuro); margin-bottom: 15px; }

footer { background: var(--verde-escuro); color: white; text-align: center; padding: 40px; }