#tabla_tarifas {
    margin: 20px auto;
    width: 90%;
    border-collapse: collapse;
    box-sizing: border-box;
}

#tabla_tarifas th, #tabla_tarifas td {
    border: 1px solid #ccc;
    padding: 15px;
}

#tabla_tarifas th {
    background-color: #003366;
    color: white;
}

#tabla_tarifas tr:nth-child(even) {
    background-color: #f9f9f9;
}

@media screen and (max-width: 768px) {
    #tabla_tarifas th, #tabla_tarifas td {
        padding: 10px;
    }
}