/* Configuración básica */
body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    font-family: 'Open Sans', sans-serif; /* Tipografía moderna */
    background: linear-gradient(135deg, #1a1a1a, #333); /* Degradado oscuro */
    color: #f4f4f4;
}

.back-button-container {
    position: absolute;
    top: 20px;
    left: 20px;
}

.back-btn {
    background-color: transparent;
    color: white;
    padding: 10px 20px;
    font-size: 18px;
    font-weight: bold;
    border: 2px solid white;
    border-radius: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.3s ease;
}

.back-btn:hover {
    background-color: #ffffff;
    color: #333;
    transform: translateY(-3px); /* Animación suave */
}

.image-container {
    position: relative;
    width: 100%;
    height: 50vh; /* La imagen ocupa la mitad de la pantalla */
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.image-container img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain; /* Mantiene la proporción sin recortar la imagen */
}

.button-container {
    position: absolute;
    bottom: 20px;
    width: 100%;
    display: flex;
    justify-content: center;
}

.download-btn {
    background-color: #007BFF;
    color: white;
    padding: 15px 40px;
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.download-btn:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

.key-elements-container {
    padding: 40px 20px;
    max-width: 1200px;
    width: 100%;
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    margin-top: 20px;
}

.key-elements-container h2 {
    font-size: 2em;
    margin-bottom: 20px;
    color: #ffffff;
}

.key-elements-list {
    list-style-type: none;
    padding: 0;
    font-size: 1.2em;
}

.key-elements-list li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.key-elements-list li:last-child {
    border-bottom: none;
}