body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #f6d9fd, #6ae4ff);
    min-height: 100vh;
}

/* Contenedor principal */
.container {
    width: 60%;
    background: white;
    margin: 40px auto;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0px 4px 18px rgba(0,0,0,0.15);
}

/* Títulos */
h1 {
    color: #2a4d7a;
    text-align: center;
    margin-bottom: 20px;
}

/* Etiquetas + Inputs */
label {
    display: block;
    margin-top: 12px;
    font-weight: bold;
    color: #333;
}

input, select {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    border: 1px solid #b6c2d1;
    border-radius: 5px;
}

/* Botón */
button, a.btn-volver {
    width: 100%;
    display: block;
    margin-top: 25px;
    background: #2a4d7a;
    color: white;
    padding: 12px;
    font-size: 16px;
    text-align: center;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
}

button:hover, a.btn-volver:hover {
    background: #1d3b60;
}

/* Resultado */
pre {
    white-space: pre-wrap;
    padding: 20px;
    background: #f7f9fc;
    border-radius: 8px;
    border-left: 5px solid #2a4d7a;
}