@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap');

/* Variáveis de Cores */
:root {
    --verde-principal: #2E8B57;
    --azul-suave: #4682B4;
    --fundo-claro: #F8F9FA;
    --texto-principal: #343A40;
    --branco: #FFFFFF;
}

/* --- RESET E ESTILOS GERAIS --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--fundo-claro);
    color: var(--texto-principal);
    line-height: 1.7;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1; 
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: auto;
}

/* Header e Navegação */
header {
    background-color: var(--branco);
    padding: 1rem 0;
    border-bottom: 1px solid #ddd;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    color: var(--verde-principal);
    font-weight: 600;
    font-size: 1.5rem;
    text-decoration: none;
}

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

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

header nav ul li a {
    text-decoration: none;
    color: var(--texto-principal);
    font-weight: 400;
    transition: color 0.3s ease;
}

header nav ul li a:hover {
    color: var(--verde-principal);
}

/* Seção Hero (Home) */
#hero {
    background-color: var(--verde-principal);
    color: var(--branco);
    text-align: center;
    padding: 4rem 1rem;
}

#hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* Cards de Dicas */
.cards-container {
    display: flex;
    gap: 20px;
    margin-top: 2rem;
}

.card {
    background: var(--branco);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    flex: 1;
}

/* Estilos de Conteúdo Geral */
main section {
    padding: 3rem 0;
}

h2 {
    color: var(--verde-principal);
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2rem;
}

.lista-info li {
    background: var(--branco);
    margin-bottom: 10px;
    padding: 15px;
    border-left: 5px solid var(--azul-suave);
    list-style: none;
}

/* Formulário IMC */
.form-imc {
    max-width: 500px;
    margin: auto;
    background: var(--branco);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.form-imc label {
    display: block;
    margin-bottom: 5px;
}

.form-imc input {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.form-imc button {
    width: 100%;
    padding: 12px;
    background-color: var(--verde-principal);
    color: var(--branco);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

.form-imc button:hover {
    background-color: #257044;
}

#resultadoIMC {
    margin-top: 20px;
    padding: 15px;
    border-radius: 4px;
    text-align: center;
    font-weight: 600;
    word-wrap: break-word;
}

/* Rodapé */
footer {
    background: var(--texto-principal);
    color: #ccc;
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
}

/* Efeitos JS */
.fade-in-element {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.fade-in-element.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- SEÇÃO DE RESPONSIVIDADE --- */

#btn-mobile {
    display: none;
    border: none;
    background: none;
    cursor: pointer;
}

@media (max-width: 768px) {
    h1, #hero h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }

    .cards-container {
        flex-direction: column;
    }
    
    #btn-mobile {
        display: block;
        z-index: 2000;
    }

    #hamburger {
        display: block;
        width: 20px;
        height: 2px;
        background-color: var(--texto-principal);
        position: relative;
        transition: 0.3s;
    }
    #hamburger::before, #hamburger::after {
        content: '';
        display: block;
        width: 20px;
        height: 2px;
        background-color: var(--texto-principal);
        position: absolute;
        transition: 0.3s;
    }
    #hamburger::before {
        top: -6px;
    }
    #hamburger::after {
        bottom: -6px;
    }
    
    #nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--branco);
        flex-direction: column;
        align-items: center;
        border-bottom: 1px solid #ddd;
        padding-bottom: 1rem;
    }
    
    #nav-menu.active {
        display: flex;
    }

    #nav-menu li {
        margin: 15px 0;
    }

    #nav-menu.active + #btn-mobile #hamburger {
        background-color: transparent;
    }
    #nav-menu.active + #btn-mobile #hamburger::before {
        transform: rotate(45deg);
        top: 0;
    }
    #nav-menu.active + #btn-mobile #hamburger::after {
        transform: rotate(-45deg);
        bottom: 0;
    }
}