/* 1. Configurações Globais */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    background-color: #0b0d17; /* Tom escuro espacial */
    color: #ffffff;
}

/* 2. Menu de Navegação */
nav {
    background-color: rgba(26, 26, 26, 0.95);
    padding: 1.2rem;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid #3498db;
}

nav a {
    color: #80c2ff;
    text-decoration: none;
    margin: 0 20px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: 0.3s;
}

nav a:hover {
    color: #3498db;
}

/* 3. Cabeçalho com Imagem de Fundo (Banner) */
header {
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), 
                url('img/valentina_tereshkova.webp');
    background-size: cover;
    background-position: center;
    color: rgb(255, 255, 255);
    text-align: center;
    padding: 100px 20px;
    border-bottom: 4px solid #2873a5;
}

header h1 {
    font-size: 3.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 10px rgba(0,0,0,0.5);
}

/* 4. Conteúdo das Páginas */
section {
    max-width: 850px;
    margin: 40px auto;
    background: #1c1f2b; /* Fundo dos cards */
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

h2 {
    color: #3498db;
    margin-bottom: 20px;
    font-size: 2rem;
    border-left: 5px solid #3498db;
    padding-left: 15px;
}

p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: #ccc;
}

/* 5. CONFIGURAÇÃO DE IMAGENS DO CONTEÚDO */
.img-box {
    text-align: center;
    margin: 30px 0;
}

.img-box img {
    max-width: 100%; /* Garante que a imagem não saia da tela */
    height: auto;
    border-radius: 10px;
    border: 3px solid #488cb9;
    box-shadow: 0 0 20px rgba(64, 147, 255, 0.3); /* Brilho azul suave */
    transition: transform 0.4s ease;
}

.img-box img:hover {
    transform: scale(1.02); /* Efeito de zoom ao passar o mouse */
}

.legenda {
    display: block;
    margin-top: 12px;
    font-size: 0.9rem;
    color: #888;
    font-style: italic;
}

/* 6. Listas Estilizadas */
ul {
    list-style: none;
    padding-left: 0;
}

li {
    background: rgba(52, 152, 219, 0.1);
    margin: 10px 0;
    padding: 10px 15px;
    border-radius: 5px;
    border-left: 3px solid #3498db;
}