/* ======================================== */
/* 1. CONFIGURAÇÕES GERAIS E VARIÁVEIS      */
/* ======================================== */
:root {
    /* Paleta de Cores inspirada no Agro */
    --primary-green: #2C5F2D;    /* Verde Escuro (floresta) */
    --secondary-green: #4A7C59;  /* Verde Médio (folhagem) */
    --accent-beige: #E0D8B0;     /* Bege (terra seca) */
    --light-bg: #F9F9F7;         /* Fundo Claro (quase branco) */
    --dark-text: #212121;        /* Texto Escuro */
    --light-text: #FFFFFF;       /* Texto Claro */
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--light-bg);
    color: var(--dark-text);
    line-height: 1.7;
    overflow-x: hidden; /* Evita scroll horizontal */
}

h1, h2, h3 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    color: var(--primary-green);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 20px;
}

/* ======================================== */
/* 2. HEADER E NAVEGAÇÃO                    */
/* ======================================== */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%; /* Aumentado para o estado inicial */
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    z-index: 1000;
    transition: all 0.3s ease;
}

/* ----- HEADER DINÂMICO (NOVO) ----- */
header.header-scrolled {
    padding: 15px 5%;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.logo {
    font-family: 'Poppins', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-green);
    text-decoration: none;
    z-index: 1010; /* Para ficar acima do menu mobile */
}

.logo i {
    color: var(--secondary-green);
    margin-right: 8px;
    vertical-align: middle;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
}

nav a {
    text-decoration: none;
    color: var(--primary-green);
    font-weight: 500;
    position: relative;
    padding: 5px 0;
    transition: color 0.3s ease;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--secondary-green);
    transition: width 0.4s ease;
}

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

nav a:hover::after {
    width: 100%;
}

/* ----- MENU HAMBÚRGUER (NOVO) ----- */
.hamburger-menu {
    display: none;
    font-size: 2rem;
    color: var(--primary-green);
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1010;
}

.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(5px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    transition: all 0.4s ease;
    z-index: 1005;
}

.mobile-nav.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mobile-nav ul {
    list-style: none;
    padding: 0;
    text-align: center;
}

.mobile-nav li {
    margin: 25px 0;
}

.mobile-nav a {
    text-decoration: none;
    color: var(--primary-green);
    font-family: 'Poppins', sans-serif;
    font-size: 2rem;
    font-weight: 600;
}

/* ======================================== */
/* 3. SEÇÃO HERO (BANNER PRINCIPAL)         */
/* ======================================== */

/* CORREÇÃO: Margem negativa para compensar o padding do main */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--light-text);
    overflow: hidden;
    margin-top: -100px; /* Compensa o padding-top do main */
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.unsplash.com/photo-1560493676-04071c5f467b?q=80&w=1974&auto=format&fit=crop') no-repeat center center/cover;
    z-index: -2;
    animation: kenburns 20s ease-out infinite;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5); /* Overlay escuro */
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    animation: fadeIn 2s ease-in-out;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 700;
    color: var(--light-text);
    margin-bottom: 20px;
    text-shadow: 2px 2px 10px rgba(0,0,0,0.5);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.cta-button {
    display: inline-block;
    padding: 15px 35px;
    background-color: var(--accent-beige);
    color: var(--primary-green);
    text-decoration: none;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.cta-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
    background-color: #f0e9c8;
}

/* Keyframes para animações */
@keyframes kenburns {
    0% { transform: scale(1.1) translate(0, 0); }
    50% { transform: scale(1.2) translate(-1%, 1%); }
    100% { transform: scale(1.1) translate(0, 0); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ======================================== */
/* 4. SEÇÕES DE CONTEÚDO                    */
/* ======================================== */

/* CORREÇÃO: Adiciona padding-top para não ficar sob o header */
main {
    padding-top: 100px; /* Altura aproximada do header */
}

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

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.section-title p {
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* ----- SEÇÃO SOBRE ----- */
#sobre {
    background: var(--light-text);
}

.sobre-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.sobre-item h3 {
    font-size: 1.6rem;
    margin-bottom: 15px;
    color: var(--secondary-green);
}

.sobre-item p {
    margin-bottom: 20px;
    text-align: justify;
}

/* ----- Estilo dos Cards (Links, Estudantes, Ferramentas) ----- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    align-items: stretch; /* Garante altura igual */
}

.card {
    background: var(--light-text);
    border-radius: 15px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex; /* Para alinhar link no rodapé */
    flex-direction: column;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.card-icon {
    font-size: 3rem;
    color: var(--secondary-green);
    padding: 30px;
    text-align: center;
    background-color: #eaf1eb;
}

.card-content {
    padding: 30px;
    flex-grow: 1; /* Empurra o link para baixo */
}

.card-content h3 {
    margin-bottom: 15px;
    font-size: 1.4rem;
}

.card-content p {
    font-size: 0.95rem;
    margin-bottom: 20px;
    text-align: justify;
}

.card-link {
    text-decoration: none;
    color: var(--secondary-green);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: auto; /* Alinha no rodapé do card */
}

.card-link i {
    transition: transform 0.3s ease;
}

.card-link:hover i {
    transform: translateX(5px);
}

/* ----- SEÇÃO ESTUDANTES (COM PARALLAX) ----- */
#estudantes {
    /* Imagem de fundo */
    background-image: url('https://images.unsplash.com/photo-1492496913980-601348b6b368?q=80&w=1974&auto=format&fit=crop');
    background-attachment: fixed; /* Efeito Parallax */
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    position: relative;
}

#estudantes::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-color: rgba(44, 95, 45, 0.9); /* Overlay verde-escuro (90%) */
    z-index: 1;
}

/* CORRIGIDO: Aplicando z-index aos filhos da seção */
#estudantes .section-title,
#estudantes .card-grid {
    position: relative; /* Necessário para o z-index funcionar */
    z-index: 2;        /* Coloca o conteúdo na frente do overlay */
}

/* NOVAS REGRAS para inverter a cor do título da seção */
#estudantes .section-title h2 {
    color: var(--light-text);
}

#estudantes .section-title p {
    color: rgba(255, 255, 255, 0.85);
}

/* ----- SEÇÃO CHAMADA FERRAMENTAS/GLOSSÁRIO (COM ÍCONES) ----- */
#chamada-ferramentas,
#chamada-glossario {
    background-color: var(--light-bg);
}
/* REMOVIDO o bloco #chamada-glossario que deixava o fundo branco */

.chamada-grid {
    display: grid;
    grid-template-columns: 150px 1fr; /* Coluna para o ícone */
    gap: 40px;
    align-items: center;
    background-color: #fff;
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease; /* Adicionado para hover */
}

/* Efeito de Hover (Padrão para card branco) */
.chamada-grid:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

/* ----- NOVAS REGRAS: Card de Ferramentas e Glossário (Alto Contraste) ----- */
#chamada-ferramentas .chamada-grid,
#chamada-glossario .chamada-grid {
    background-color: var(--secondary-green); /* Fundo Verde */
    color: var(--light-text); /* Texto padrão claro */
}

#chamada-ferramentas .chamada-grid:hover,
#chamada-glossario .chamada-grid:hover {
    background-color: var(--primary-green); /* Verde mais escuro no hover */
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

#chamada-ferramentas .chamada-content h2,
#chamada-glossario .chamada-content h2 {
    color: var(--light-text); /* Título claro */
}

#chamada-ferramentas .chamada-content p,
#chamada-glossario .chamada-content p {
    color: rgba(255, 255, 255, 0.9); /* Texto claro com leve transparência */
}

/* Ícone dos cards (círculo branco, ícone verde) */
#chamada-ferramentas .chamada-icon,
#chamada-glossario .chamada-icon {
    background-color: #fff; /* Círculo branco */
    color: var(--secondary-green); /* Ícone verde */
}

/* ----- Card do Glossário (Mantém a inversão de layout) ----- */
/* Inverte layout para o glossário */
#chamada-glossario .chamada-grid {
    grid-template-columns: 1fr 150px; /* Coluna do ícone à direita */
}
#chamada-glossario .chamada-content {
    order: 1; /* Joga texto para a esquerda */
}
#chamada-glossario .chamada-icon {
    order: 2; /* Joga ícone para a direita */
}

.chamada-icon {
    font-size: 4rem; /* Tamanho do ícone */
    color: var(--secondary-green);
    opacity: 1.0; /* Opacidade total */
    line-height: 1;
    width: 120px; /* Largura do círculo */
    height: 120px; /* Altura do círculo */
    border-radius: 50%; /* Faz o círculo */
    background-color: #eaf1eb; /* Fundo verde claro (Padrão do card claro) */
    display: flex; /* Para centralizar o ícone */
    align-items: center; /* Centraliza verticalmente */
    justify-content: center; /* Centraliza horizontalmente */
    margin: 0 auto; /* Centraliza o círculo na grid */
}

.chamada-content h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.chamada-content p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    text-align: justify;
}

/* ----- SEÇÃO CONTATO ----- */
#contato {
    background-color: var(--light-bg); /* MANTIDO FUNDO CLARO */
}

.contact-grid {
    display: grid;
    /* Alinhando os cards no centro */
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.contact-card {
    background-color: var(--light-text); /* Fundo branco */
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

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

.contact-card i {
    font-size: 3rem;
    color: var(--secondary-green);
    margin-bottom: 20px;
}

.contact-card h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
}

.contact-card p {
    font-size: 1.1rem;
    color: #333;
    word-break: break-all;
}

/* ======================================== */
/* 5. ANIMAÇÕES DE SCROLL                   */
/* ======================================== */
/* Aplicado a seções e cards individuais */
.fade-in-element {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

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

/* Staggered (atraso) para os cards */
.card-grid .card:nth-child(2) {
    transition-delay: 0.15s;
}
.card-grid .card:nth-child(3) {
    transition-delay: 0.3s;
}

/* ======================================== */
/* 6. FOOTER                                */
/* ======================================== */
footer {
    background-color: var(--primary-green);
    color: var(--light-text);
    text-align: center;
    padding: 60px 20px 40px;
}

.footer-content h3 {
    color: var(--light-text);
    font-size: 1.8rem;
    margin-bottom: 15px;
}

.footer-content p {
    color: var(--accent-beige);
    margin-bottom: 30px;
}

.copyright {
    margin-top: 30px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ======================================== */
/* 7. BOTÃO "VOLTAR AO TOPO" (NOVO)         */
/* ======================================== */
.back-to-top {
    position: fixed;
    bottom: 25px;
    right: 25px;
    width: 50px;
    height: 50px;
    background: var(--secondary-green);
    color: var(--light-text);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s ease;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-green);
}

/* ======================================== */
/* 8. PÁGINA GLOSSÁRIO (NOVO)               */
/* ======================================== */

.glossary-nav {
    background-color: #fff;
    padding: 15px 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 40px;
    text-align: center;
    /* REMOVIDO: position: sticky; */
}

.glossary-nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 5px;
}

.glossary-nav a {
    display: block;
    width: 35px;
    height: 35px;
    line-height: 35px;
    text-align: center;
    text-decoration: none;
    color: var(--primary-green);
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.glossary-nav a:hover {
    background-color: var(--accent-beige);
    color: var(--primary-green);
}

.glossary-section {
    margin-bottom: 40px;
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
}

.glossary-section h2 {
    font-size: 2.5rem;
    color: var(--secondary-green);
    border-bottom: 2px solid var(--accent-beige);
    padding-bottom: 15px;
    margin-bottom: 25px;
}

.term-item {
    margin-bottom: 25px;
}

.term-item h3 {
    font-size: 1.5rem;
    color: var(--primary-green);
    margin-bottom: 8px;
}

.term-item p {
    text-align: justify;
    padding-left: 15px;
    border-left: 3px solid var(--secondary-green);
}

/* ======================================== */
/* 9. PÁGINAS DE FERRAMENTAS (NOVAS)        */
/* ======================================== */
.page-title {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    background-color: var(--light-text);
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.page-title h1 {
    font-size: 2.8rem;
}
.page-title p {
    font-size: 1.1rem;
    color: #666;
    max-width: 700px;
    margin: 10px auto 0;
}

/* Estilo do container da ferramenta */
.tool-container {
    background-color: var(--light-text);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    max-width: 1000px;
    margin: 0 auto 40px; /* Adiciona margem inferior */
}

.tool-container h2 {
    font-size: 1.8rem;
    color: var(--secondary-green);
    border-bottom: 2px solid var(--accent-beige);
    padding-bottom: 15px;
    margin-bottom: 30px;
}

/* Grid para os formulários */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.form-group label {
    display: block;
    font-weight: 500;
    color: #333;
    margin-bottom: 8px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ccc;
    border-radius: 8px;
    background-color: var(--light-bg);
    font-family: 'Roboto', sans-serif;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--secondary-green);
    box-shadow: 0 0 0 3px rgba(74, 124, 89, 0.2);
}

/* Botão da Calculadora */
.tool-button {
    background-color: var(--secondary-green);
    color: var(--light-text);
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 1.1rem;
    padding: 15px 40px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: block;
    margin: 40px auto 0;
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.tool-button:hover {
    background-color: var(--primary-green);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

/* Área de Resultados */
.tool-results {
    margin-top: 40px;
    background-color: var(--light-bg);
    padding: 30px;
    border-radius: 10px;
    border: 1px solid #e0e0e0;
}

.tool-results h3 {
    font-size: 1.5rem;
    color: var(--primary-green);
    margin-bottom: 20px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px dashed #ccc;
}
.result-item:last-child {
    border-bottom: none;
}
.result-item span {
    font-weight: 500;
    color: #444;
}
.result-item strong {
    font-size: 1.2rem;
    color: var(--secondary-green);
}

/* Resultados da Adubação */
.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.result-card {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}
.result-card h4 {
    font-size: 1.2rem;
    color: var(--primary-green);
    text-align: center;
    margin-bottom: 15px;
}
.result-card .result-item {
    font-size: 0.95rem;
    padding: 10px 0;
}
.result-card .result-item strong {
    font-size: 1.1rem;
}
.nutrient-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    text-align: center;
    margin-bottom: 20px;
}
.nutrient-box {
    background-color: #fff;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}
.nutrient-box p {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 5px;
}
.nutrient-box .value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--secondary-green);
}
.nutrient-box .unit {
    font-size: 0.8rem;
    color: #999;
}
.tool-results .obs {
    font-size: 0.9rem;
    color: #777;
    margin-bottom: 20px;
    text-align: center;
}
.disclaimer {
    margin-top: 20px;
    padding: 15px;
    background-color: #fff8e1;
    border: 1px solid #ffecb3;
    color: #6d4c00;
    border-radius: 8px;
    text-align: center;
    font-size: 0.9rem;
}
.error-message {
    display: none; /* Oculto por padrão */
    margin-top: 20px;
    padding: 15px;
    background-color: #fde8e8;
    border: 1px solid #f9c0c0;
    color: #a94442;
    border-radius: 8px;
    text-align: center;
}

/* ======================================== */
/* 10. RESPONSIVIDADE                       */
/* ======================================== */
@media (max-width: 992px) {
    .sobre-grid,
    .chamada-grid {
        grid-template-columns: 1fr;
    }
    .chamada-icon {
        order: -1; /* Joga ícone para cima no mobile */
        margin-bottom: 0px;
        font-size: 4rem; /* Diminui ícone no mobile */
        width: 100px; /* Diminui círculo no mobile */
        height: 100px; /* Diminui círculo no mobile */
    }
    #chamada-glossario .chamada-content {
        order: 0; /* Reseta a ordem no mobile */
    }
    #chamada-glossario .chamada-icon {
        order: -1; /* Mantém ícone em cima no mobile */
    }
    .results-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero {
        margin-top: -100px; /* Mantém a compensação original */
    }
    main {
        padding-top: 100px; /* Mantém o padding-top do main */
    }
    .hero h1 {
        font-size: 2.8rem;
    }
    .hero p {
        font-size: 1rem;
    }
    nav ul {
        display: none; /* Esconde menu desktop */
    }
    .hamburger-menu {
        display: block; /* Mostra menu hambúrguer */
    }
    .container {
        padding: 60px 20px;
    }
    .section-title h2 {
        font-size: 2rem;
    }
    .page-title h1 {
        font-size: 2.2rem;
    }
    .tool-container {
        padding: 25px;
    }
    .tool-grid {
        grid-template-columns: 1fr; /* Coluna única no mobile */
    }
    .nutrient-grid {
        grid-template-columns: 1fr;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .chamada-grid {
        padding: 30px;
        gap: 30px;
    }
}