:root {
    --primary: #2d5a27;
    --secondary: #8bc34a;
    --accent: #d4a373;
    --dark: #1b3022;
    --light: #f9fbf9;
    --white: #ffffff;
}

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

body {
    font-family: 'Open Sans', sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--light);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Nav */
header {
    background: var(--white);
    padding: 20px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: 0.3s;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: 'Montserrat', sans-serif;
    color: var(--primary);
}

.logo span {
    color: var(--secondary);
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li a {
    text-decoration: none;
    color: var(--dark);
    margin-left: 30px;
    font-weight: 600;
    transition: 0.3s;
}

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

/* 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&q=80') no-repeat center center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
}

.hero-content h2 {
    font-size: 3.5rem;
    font-family: 'Montserrat', sans-serif;
    margin-bottom: 20px;
}

.btn-main {
    display: inline-block;
    background: var(--secondary);
    color: var(--white);
    padding: 15px 35px;
    text-decoration: none;
    border-radius: 50px;
    margin-top: 25px;
    font-weight: bold;
    transition: transform 0.3s;
}

.btn-main:hover {
    transform: scale(1.05);
    background: var(--primary);
}

/* Features Section */
.features {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.underline {
    width: 80px;
    height: 4px;
    background: var(--accent);
    margin: 10px auto;
}

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

.card {
    background: var(--white);
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    transition: 0.3s;
    border-bottom: 5px solid transparent;
}

.card:hover {
    transform: translateY(-10px);
    border-color: var(--secondary);
}

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

/* Form */
.contact {
    background: var(--primary);
    color: var(--white);
    padding: 80px 0;
    text-align: center;
}

form {
    max-width: 600px;
    margin: 40px auto 0;
}

form input, form textarea {
    width: 100%;
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 5px;
    border: none;
}

.btn-submit {
    background: var(--secondary);
    color: white;
    border: none;
    padding: 15px 40px;
    cursor: pointer;
    font-weight: bold;
    width: 100%;
    border-radius: 5px;
}

footer {
    padding: 30px;
    text-align: center;
    background: var(--dark);
    color: var(--light);
}

/* Responsive */
@media (max-width: 768px) {
    nav ul { display: none; } /* Simplicidade para o exemplo */
    .hero-content h2 { font-size: 2.2rem; }
}