.flipbook-wrapper {
    position: relative;
    margin: 20px auto;
    width: 100%;
    max-width: 1200px;
    text-align: center;
    font-family: Arial, sans-serif;
    overflow-x: hidden;
    background-color: transparent;
}

/* --- ESTILOS PARA PANTALLA COMPLETA --- */
.flipbook-wrapper:fullscreen {
    background-color: #1a1a1a;
    max-width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.flipbook-wrapper:-webkit-full-screen {
    background-color: #1a1a1a;
    max-width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.flipbook-wrapper:fullscreen #page-nav-string,
.flipbook-wrapper:-webkit-full-screen #page-nav-string {
    color: #ffffff;
}
/* -------------------------------------- */

#flipbook-loading {
    padding: 50px;
    font-size: 18px;
    color: #555;
    background: #f9f9f9;
    border: 1px dashed #ccc;
    border-radius: 4px;
}

.flipbook {
    margin: 0 auto;
    display: none; 
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.flipbook .page {
    background-color: white;
    background-size: 100% 100%;
    background-repeat: no-repeat;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.1);
}

.flipbook .even { background-image: linear-gradient(to right, rgba(0,0,0,0.12) 0%, rgba(0,0,0,0) 10%); }
.flipbook .odd { background-image: linear-gradient(to left, rgba(0,0,0,0.12) 0%, rgba(0,0,0,0) 10%); }

.flipbook-controls {
    margin-top: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    z-index: 10;
}

/* --- BOTONES CON COLORES CORPORATIVOS --- */
.fb-btn {
    background: #003366; /* Azul oscuro corporativo */
    color: #fff;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 3px;
    font-size: 15px;
    transition: background 0.3s ease;
}

.fb-btn:hover { 
    background: #005bb5; /* Azul brillante para el hover */
}

#page-nav-string { font-size: 15px; color: #333; font-weight: bold; }