body{
    background: linear-gradient(135deg,#428ed1,#00c6ff);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin:0;
    padding:0;
    min-height:100vh;
    display:flex;
    flex-direction:column;
}

/* HEADER */
header{
    background:#1e3c72;
    color:white;
    padding:20px;
    text-align:center;
    box-shadow:0 4px 15px rgba(0,0,0,0.2);
}

header h1{
    font-size:38px;
    margin:0;
    font-weight:700;
    color:white;
}


.container{
    background:white;
    max-width:650px;
    padding:40px;
    border-radius:15px;
    box-shadow:0 10px 30px rgba(0,0,0,0.2);
    margin-top:50px;
    margin-bottom:40px;
}

/* Pequeño efecto al pasar el mouse */
.container:hover{
    transform:translateY(-5px);
}

/* TITULO*/
h1{
    text-align:center;
    margin-bottom:25px;
    font-weight:700;
    color:#333;
}

/*  ETIQUETAS  */
.form-label{
    font-weight:600;
    color:#444;
}

/* INPUTS */
.form-control{
    border-radius:10px;
    border:1px solid #ccc;
    padding:10px;
    transition: all 0.3s ease;
}

/* Efecto al seleccionar */
.form-control:focus{
    border-color:#00c6ff;
    box-shadow:0 0 8px rgba(0,198,255,0.5);
}

/* BOTONES*/
.btn-primary{
    border-radius:10px;
    padding:10px 20px;
    font-weight:bold;
    background:linear-gradient(135deg,#428ed1,#00c6ff);
    border:none;
    transition: all 0.3s;
}

.btn-primary:hover{
    transform:scale(1.05);
    box-shadow:0 5px 15px rgba(0,0,0,0.2);
}

/* Botón secundario */
.btn-secondary{
    border-radius:10px;
    padding:10px 20px;
    font-weight:bold;
    margin-left:10px;
}

/* ESPACIADO */
.mb-3{
    margin-bottom:18px;
}

/*  FOOTER*/
footer{
    background:#1e3c72;
    color:white;
    text-align:center;
    padding:15px;
    margin-top:auto;
    font-size:14px;
}

/*  RESPONSIVE */
@media (max-width:768px){
    .container{
        width:90%;
        padding:25px;
    }

    header h1{
        font-size:28px;
    }

    header h2{
        font-size:16px;
    }
}