body {
    min-height: 100vh;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;

    background: url("barrio.gif") center center/cover no-repeat fixed;
    overflow: hidden;
    position: relative;
}

/* Capa oscura */
body::before {
    content: "";
    position: fixed;
    inset: 0;

    background:
    linear-gradient(
        rgba(0,0,0,0.55),
        rgba(0,0,0,0.75)
    );

    z-index: 0;
}

/* Luces de ambiente */
body::after {
    content: "";
    position: fixed;
    inset: 0;

    background:
    radial-gradient(circle at 20% 30%, rgba(255,120,0,.15), transparent 30%),
    radial-gradient(circle at 80% 60%, rgba(100,0,255,.15), transparent 35%);

    z-index: 0;
}

/* Tarjeta principal */
.card{
    position: relative;
    z-index: 2;

    width: 90%;
    max-width: 600px;

    padding: 40px;

    background: rgba(10,10,10,0.45);
    backdrop-filter: blur(14px);

    border: 1px solid rgba(255,255,255,.1);
    border-radius: 24px;

    box-shadow:
    0 0 40px rgba(255,120,0,.15),
    0 0 80px rgba(120,0,255,.12);

    color: white;
    text-align: center;
}

/* Título */
h1{
    font-size: 2.5rem;
    margin-bottom: 15px;
    letter-spacing: 2px;

    text-shadow:
    0 0 10px rgba(255,120,0,.8),
    0 0 20px rgba(255,120,0,.4);
}

/* Texto */
p{
    color: rgba(255,255,255,.85);
    line-height: 1.8;
    font-size: 1.1rem;
}

/* Botón */
.btn{
    display: inline-block;
    margin-top: 20px;

    padding: 14px 28px;

    border-radius: 50px;

    background: linear-gradient(
        135deg,
        #ff7b00,
        #ff4d00
    );

    color: white;
    text-decoration: none;
    font-weight: bold;

    transition: .3s;
}

.btn:hover{
    transform: translateY(-3px);
    box-shadow: 0 0 25px rgba(255,120,0,.5);
}

.card {
    overflow: hidden;
}

.card img {
    width: 100%;
    max-height: 420px;
    object-fit: cover;
    border-radius: 18px;
}