/* Configurações Gerais */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    scroll-behavior: smooth;
}

:root {
    --verde-principal: #2e7d32;
    --verde-claro: #4caf50;
    --amarelo-sol: #fbc02d;
    --escuro: #212121;
    --cinza-claro: #f5f5f5;
    --branco: #ffffff;
}

body {
    background-color: var(--branco);
    color: var(--escuro);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Cabeçalho */
header {
    background-color: var(--verde-principal);
    color: var(--branco);
    padding: 20px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

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

.logo h2 span {
    color: var(--amarelo-sol);
}

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

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: var(--branco);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

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

/* Seção Hero */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), 
                url('https://images.unsplash.com/photo-1508514177221-188b1cf16e9d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1350&q=80') no-repeat center center/cover;
    height: 100vh;
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--branco);
    padding-top: 80px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    background-color: var(--amarelo-sol);
    color: var(--escuro);
    padding: 12px 30px;
    text-decoration: none;
    font-weight: bold;
    border-radius: 5px;
    transition: background 0.3s;
}

.btn:hover {
    background-color: #f9a825;
}

/* Seção Benefícios */
.beneficios {
    padding: 80px 0;
    background-color: var(--cinza-claro);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--verde-principal);
    margin-bottom: 40px;
}

.grid-beneficios {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: var(--branco);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border-top: 5px solid var(--verde-claro);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

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

/* Seção Calculadora */
.calculadora-section {
    padding: 80px 0;
}

.sub {
    text-align: center;
    margin-bottom: 30px;
    color: #666;
}

.calculadora-box {
    max-width: 500px;
    margin: 0 auto;
    background: var(--cinza-claro);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.input-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 20px;
}

.input-group label {
    margin-bottom: 8px;
    font-weight: 600;
}

.input-group input {
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1rem;
}

.btn-calc {
    width: 100%;
    background-color: var(--verde-principal);
    color: var(--branco);
    border: none;
    padding: 12px;
    font-size: 1rem;
    font-weight: bold;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-calc:hover {
    background-color: var(--verde-claro);
}

.resultado {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px dashed #ccc;
}

.resultado h3 {
    color: var(--verde-principal);
    margin-bottom: 10px;
}

.hidden {
    display: none;
}

/* Rodapé */
footer {
    background-color: var(--escuro);
    color: var(--branco);
    text-align: center;
    padding: 30px 0;
    font-size: 0.9rem;
}

/* Responsividade Básica */
@media(max-width: 768px) {
    .header-container {
        flex-direction: column;
    }
    nav ul {
        margin-top: 15px;
    }
    .hero-content h1 {
        font-size: 2rem;
    }
}