body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #833ab4, #fd1d1d, #fcb045);
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background: rgba(0, 0, 0, 0.8);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0px 0px 20px rgba(0, 0, 0, 0.5);
    width: 90%;
    max-width: 400px;
}

h1, h2 {
    margin-bottom: 10px;
}

input {
    padding: 10px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    width: 100%;
    margin: 5px 0;
}

#result, #compareResult {
    margin-top: 20px;
    font-size: 18px;
}

hr {
    margin: 20px 0;
    border: 1px solid #555;
}

/* Botón Back */
.back-button {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #fd1d1d, #fcb045);
    color: white;
    font-size: 16px;
    font-weight: bold;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.5);
    transition: transform 0.2s, box-shadow 0.2s;
}

.back-button:hover {
    transform: scale(1.1);
    box-shadow: 0px 6px 15px rgba(0, 0, 0, 0.7);
}