:root {
    --bg: #ffffff;
    --text: #1a1a1a;
    --header-bg: #f8f9fa;
    --accent: #e74c3c; /* Un rojo distópico para 1984 */
    --border: rgba(0,0,0,0.1);
}

body.dark-mode {
    --bg: #121212;
    --text: #e0e0e0;
    --header-bg: #1a1a1a;
    --border: rgba(255,255,255,0.1);
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Georgia', serif; /* Ideal para lectura prolongada */
    margin: 0;
    line-height: 1.8;
    transition: background 0.3s, color 0.3s;
}

#main-header {
    position: sticky;
    top: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.logo-area h1 {
    font-size: 1.5rem;
    margin: 0;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 20px;
}

#status-tag {
    font-size: 0.85rem;
    font-family: sans-serif;
    opacity: 0.6;
}

#content-area {
    max-width: 750px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Estilos de los capítulos renderizados por app.js */
.chapter {
    margin-bottom: 100px;
}

.chapter-header {
    color: var(--accent);
    font-size: 2.2rem;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
    padding-bottom: 5px;
}

p {
    font-size: 1.25rem;
    margin-bottom: 1.6rem;
    text-align: justify;
}

/* Botón de Modo */
#theme-btn {
    background: var(--text);
    color: var(--bg);
    border: none;
    padding: 8px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: opacity 0.2s;
}

#theme-btn:hover {
    opacity: 0.8;
}

.loader {
    text-align: center;
    margin-top: 100px;
    font-style: italic;
    color: var(--accent);
}