body {
    font-family: Arial;
    background: #0f172a;
    color: white;
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.container {
    background: #1e293b;
    padding: 25px;
    border-radius: 12px;
    width: 350px;
}

input, select {
    width: 100%;
    margin-bottom: 10px;
    padding: 10px;
    border-radius: 5px;
    border: none;
}

button {
    width: 100%;
    padding: 10px;
    background: #38bdf8;
    border: none;
    border-radius: 5px;
    margin-top: 5px;
}

.btn-limpiar {
    background: #f87171;
}

#resultado, #conversion {
    margin-top: 10px;
    padding: 10px;
    background: #020617;
    border-radius: 8px;
}