/* BODY */
body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #111;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

/* APP CONTENEDOR */
.app {
    width: 320px;
    height: 600px;
    background: linear-gradient(135deg, #ff758c, #ff7eb3);
    border-radius: 30px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    position: relative;
}

/* PANTALLAS */
.pantalla {
    position: absolute;
    width: 100%;
    height: 100%;
    text-align: center;
    color: white;
    padding: 40px 20px;
    opacity: 0;
    transform: translateX(100%);
    transition: 0.5s;
}

.pantalla.activa {
    opacity: 1;
    transform: translateX(0);
}

/* TEXTOS */
h1, h2 {
    margin-bottom: 20px;
}

/* BOTONES */
button {
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 20px;
    transition: 0.3s;
}

.si {
    background: #22c55e;
    color: white;
}

.si:hover {
    transform: scale(1.1);
}

#no {
    background: #ef4444;
    color: white;
    position: absolute;
}

/* BOTONES CONTENEDOR */
.botones {
    position: relative;
    height: 150px;
}

/* EFECTO FINAL */
#final {
    display: flex;
    flex-direction: column;
    justify-content: center;
}