w3.css

body {
    margin:30px;
    padding: 0;
}

#left {
    width:100px;
    height:100%;
    float:left;
}

#iRight {
    width:78%;
    height:100%;
    float:right;
}

#right {
    width:90%;
    height:100%;
    float:right;
}

#compose {
    font-size:0.8em;
    color:white;
    background-color:red;
    height: 30px;
    width:120px;
}

input, textarea {
    width: 200px;
}

button {
    margin-left: 155px;
    height:25px;
    background-color:blue;
    color:white;
}

table {
    background-color:lightgray;
    border-collapse: collapse;
    width:100%;
}

caption {
    text-align: left;
    font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
    font-size:20px;
}

#center {
    text-align: center;
    width: 80%;
    display: block
}

#prev {
    margin-left:200px;
}

#next {
    margin-left:0;
}

.btn:disabled {
    cursor:not-allowed;
    opacity:0.3
}