/* ==============================
   🌑 BASE GENERAL
================================ */

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

body.lectura-body {
    background-color: #000;
    color: #ddd;
    font-family: 'Arial', sans-serif;
    line-height: 1.7;
}

/* ==============================
   🎨 VARIABLES
================================ */

:root {
    --oro: #d4af37;
}

/* ==============================
   📦 CONTENEDOR
================================ */

.container {
    max-width: 1000px;
    margin: auto;
    padding: 20px;
}

/* ==============================
   🏷️ ETAPA / CABECERA
================================ */

.badge-etapa {
    display: inline-block;
    padding: 6px 14px;
    border: 1px solid var(--oro);
    color: var(--oro);
    font-size: 0.75rem;
    letter-spacing: 1px;
    margin-bottom: 15px;
}

.oro-texto {
    color: var(--oro);
}

/* ==============================
   🎥 SECCIÓN VIDEO
================================ */

.seccion-video-avanzado {
    margin-top: 60px;
}

.seccion-video-avanzado h2 {
    margin-bottom: 25px;
}

.contenedor-video {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 14px;
    border: 1px solid rgba(212, 175, 55, 0.3);
}

.contenedor-video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* ==============================
   📘 GUÍA DE ESTUDIO
================================ */

.guia-estudio {
    margin-top: 40px;
    padding: 30px;
    background: #0c0c0c;
    border-radius: 12px;
    border: 1px solid rgba(212, 175, 55, 0.25);
}

.guia-estudio h3 {
    color: var(--oro);
    margin-bottom: 20px;
    text-align: center;
}

.guia-estudio ul {
    list-style: none;
}

.guia-estudio li {
    margin-bottom: 12px;
    font-size: 0.9rem;
    color: #bbb;
}

.guia-estudio strong {
    color: #fff;
}

/* ==============================
   🔘 BOTÓN
================================ */

.btn {
    font-size: 0.9rem;
    cursor: pointer;
    border-radius: 40px;
    transition: all 0.25s ease;
}

.btn:hover {
    background-color: var(--oro);
    color: #000;
}

/* ==============================
   ⚠️ AVISO LEGAL
================================ */

.aviso {
    font-size: 0.85rem;
    color: #777;
    text-align: center;
}

/* ==============================
    🧭 NAVBAR (Navegación Pro)
================================ */

.navbar {
    background: rgba(10, 10, 10, 0.98);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.nav-container {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 20px;
}

.nav-links a {
    color: #ddd;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: bold;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--oro);
}

/* === DROPDOWN (Desplegables) === */
.dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    background: #111;
    min-width: 160px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.5);
    border: 1px solid var(--oro);
    border-radius: 8px;
    z-index: 1;
    top: 100%;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-content li {
    list-style: none;
}

.dropdown-content a {
    padding: 12px 16px;
    display: block;
    font-size: 0.8rem;
}

/* === SELECTOR IDIOMA === */
#idioma-nav {
    background: transparent;
    color: var(--oro);
    border: 1px solid var(--oro);
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.75rem;
}