body {
    font-family: Arial, sans-serif;
    background: #f2f4f8;
    margin: 0;
    padding: 0;
}

.contenedor {
    max-width: 600px;
    margin: 50px auto;
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #1f3c88;
}

.subtitulo {
    text-align: center;
    color: #666;
    margin-bottom: 25px;
}

label {
    display: block;
    margin-top: 15px;
    font-weight: bold;
}

input {
    width: 100%;
    padding: 12px;
    margin-top: 5px;
    border: 1px solid #ccc;
    border-radius: 8px;
    box-sizing: border-box;
}

button {
    width: 100%;
    padding: 14px;
    margin-top: 25px;
    border: none;
    border-radius: 8px;
    background-color: #1f3c88;
    color: white;
    font-size: 18px;
    cursor: pointer;
}

button:hover {
    background-color: #16306d;
}

.resultado {
    margin-top: 25px;
    padding: 20px;
    background: #f7f9fc;
    border-radius: 10px;
    font-size: 18px;
    line-height: 1.6;
}
.aviso {
    margin-top: 20px;
    padding: 15px;
    background: #fff3cd;
    border-left: 5px solid #ff9800;
    border-radius: 8px;
    color: #664d03;
    font-weight: bold;
}
.reiniciar {
    margin-top: 10px;
    background-color: #666;
}

.reiniciar:hover {
    background-color: #444;
}