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

body {
    background: linear-gradient(to bottom, #87CEEB 60%, #dcdcdc 40%);
    font-family: 'Courier New', monospace;
    text-align: center;
    color: #222;
}

h1 {
    margin-top: 20px;
    font-size: 2.2em;
    text-shadow: 2px 2px 4px #fff;
}

#visor {
    position: relative;
    margin: 40px auto;
    width: 450px;
    height: 300px;
    overflow: hidden;
    border: 4px solid #222;
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0,0,0,0.4);
    background: #000;
}

#fondouno, #fondodos {
    position: absolute;
    top: 0;
}

#fondouno { left: 0; }
#fondodos { left: 450px; }

#mico {
    position: absolute;
    top: 180px;
    left: 120px;
}

#controles {
    margin-top: 30px;
}

button {
    background-color: #ffdf6c;
    border: 2px solid #222;
    border-radius: 10px;
    padding: 10px 20px;
    margin: 8px;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
    box-shadow: 3px 3px 0 #222;
}

button:hover {
    background-color: #ffd34e;
    transform: translateY(-3px);
}

button:active {
    transform: translateY(0);
    box-shadow: 1px 1px 0 #222;
}