/* 
 * Arquivo: style.css
 * Projeto: Soberania em IA | Cognivus
 * Versão: 1.0.0
 * Autor: Luciano P. de Moura - Cognivus
 * Data: Julho 2026
 * Descrição: Folha de estilos principal da aplicação (SPA). Tipografia corporativa Segoe UI.
 */

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f9f9f9;
    color: #333;
    margin: 0;
    padding: 0;
    line-height: 1.7;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-header {
    background-color: #ffffff;
    padding: 20px 40px;
    border-bottom: 1px solid #e0e0e0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #1a1a1a;
}

.user-session {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
}

.main-nav {
    background-color: #1a1a1a;
    padding: 10px 40px;
}

.tab-btn {
    background: none;
    border: none;
    color: #fff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 1rem;
    cursor: pointer;
    margin-right: 20px;
    padding: 10px 0;
    opacity: 0.7;
    transition: opacity 0.2s, border-bottom 0.2s;
    border-bottom: 2px solid transparent;
}

.tab-btn:hover {
    opacity: 1;
}

.tab-btn.active {
    opacity: 1;
    border-bottom: 2px solid #fff;
}

.lock-icon {
    font-size: 0.8rem;
    margin-left: 5px;
}

.container {
    flex: 1;
    max-width: 800px;
    margin: 40px auto;
    padding: 40px;
    background-color: #fff;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border-radius: 4px;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

h1, h2, h3 {
    color: #1a1a1a;
    font-weight: 600;
}

.book-title {
    font-size: 2.2rem;
    line-height: 1.2;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1rem;
    color: #555;
    margin-top: 0;
}

hr {
    border: 0;
    height: 1px;
    background: #e0e0e0;
    margin: 35px 0;
}

ul, ol {
    margin-bottom: 20px;
}

li {
    margin-bottom: 10px;
}

.cta-button {
    display: inline-block;
    background-color: #0056b3;
    color: #fff;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 4px;
    font-weight: bold;
    margin-top: 20px;
    transition: background-color 0.2s;
}

.cta-button:hover {
    background-color: #004494;
}

.main-footer {
    background-color: #f1f1f1;
    text-align: center;
    padding: 20px;
    font-size: 0.85rem;
    color: #666;
    border-top: 1px solid #e0e0e0;
    margin-top: auto;
}

/* Estilo do Botão de Login no Cabeçalho */
.auth-btn-header {
    background-color: #f1f1f1;
    border: 1px solid #dcdcdc;
    color: #333;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 0.85rem;
    padding: 6px 12px;
    margin-left: 15px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}
.auth-btn-header:hover {
    background-color: #e2e2e2;
    border-color: #ccc;
}