/* Normalize CSS */
* {
    box-sizing: border-box;
}

/* Body styling */
body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
}

/* Container styling */
#LEFT, #CENTRO, #RIGHT {
    float: left;
    width: 33%;
    margin: auto;
    overflow: auto;
    height: 100%;
    padding: 1em;
}

/* Specific section styling */
#LEFT {
    background-color: #add8e6; /* Light Blue */
}

#CENTRO {
    background-color: #ffcc99; /* Light Orange */
}

#RIGHT {
    width: 34%;
    background-color: #90ee90; /* Light Green */
}