body{
    height:100vh;
    margin:0;
    font-family: "Segoe UI", sans-serif;
    background: linear-gradient(135deg,#e8f3ff,#f6fbff);
}

/* fondo médico con formas suaves */
body::before{
    content:"";
    position:fixed;
    width:600px;
    height:600px;
    background:#0d6efd;
    opacity:0.08;
    border-radius:50%;
    top:-150px;
    left:-150px;
}

body::after{
    content:"";
    position:fixed;
    width:500px;
    height:500px;
    background:#20c997;
    opacity:0.08;
    border-radius:50%;
    bottom:-150px;
    right:-150px;
    z-index: -1;
}

/* tarjeta login */
.card{
    border-radius:15px;
}

.card-body{
    background:white;
}

/* título */
h4{
    color:#0d6efd;
    font-weight:600;
}