body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f5f5f5;
    display: flex;
    justify-content: center;
    padding: 30px;
}

.contenedor {
    width: 100%;
    max-width: 450px;
    background: white;
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0,0,0,.1);
}

h1 {
    text-align: center;
    color: #1b5e20;
}

h2 {
    text-align: center;
}

.info p {
    margin: 8px 0;
}

.contador {
    margin: 20px 0;
    text-align: center;
    font-size: 22px;
    font-weight: bold;
}

input {
    width: 100%;
    padding: 15px;
    border-radius: 10px;
    border: 1px solid #ccc;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    width: 100%;
    margin-top: 15px;
    padding: 15px;
    border: none;
    border-radius: 10px;
    background: #1b5e20;
    color: white;
    font-size: 18px;
    cursor: pointer;
}

button:hover {
    background: #2e7d32;
}

ul {
    list-style: none;
    padding: 0;
}

li {
    padding: 12px;
    margin-top: 10px;
    background: #f0f0f0;
    border-radius: 10px;
}