IPython/frontend/html/notebook/static/css/notebook.css

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}

body {
    background-color: white;
}

span#ipython_notebook h1 {
    font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif;
    font-size: 32pt;
    padding: 10px;
    margin: 10px;
}


div#toolbar {
    width: 100%;
    height: auto;
    border-bottom-width: 2px;
    border-bottom-style: solid;
    border-bottom-color: black;
	padding: 5px;
}

#main_toolbar {
}

#main_toolbar button {
    font-size: 0.9em;
}

div.notebook {
    width: 760px;
    height: 100%;
    margin-left: auto;
    margin-right: auto;
    padding-top: 5px;
    padding-bottom: 5px;
    background-color: white;

/*  Uncomment this block for help in debugging the padding and margins
/*    border-left-width: 1px;
    border-left-style: solid;
    border-left-color: black;
    border-right-width: 1px;
    border-right-style: solid;
    border-right-color: black;
    border-bottom-width: 1px;
    border-bottom-style: solid;
    border-bottom-color: black;*/
}

div.cell {
    width: 740px;
    margin: 5px 5px 5px 5px;
    padding: 5px;
    font-size: 11pt;
    position: relative;
}

div.code_cell {
    background-color: white;
}

div.prompt {
    vertical-align: top;
    display: table-cell;
    width: 85px;
    min-width 80px !important;
    font-family: Menlo, "Courier New", Courier, mono;
    font-weight: normal;
    font-style: normal;
}

div.input {
    display: table;
    height: auto;
}

div.input_prompt {
    color: blue;
}


textarea.input_area {
    text-align: left;
    font-family: Menlo, "Courier New", Courier, mono;
    font-size: inherit;
    border-style: none;
    display: table-cell;
    margin: 0;
    padding: 0;
    overflow: auto;
    font-weight: normal;
    font-style: normal;
    width: 665px;
    outline: none;
    resize: none;
}


div.output {
    display: table;
}

div.output_prompt {
    color: red;
}

div.output_area {
    text-align: left;
    font-family: Menlo, "Courier New", Courier, mono;
    font-size: inherit;
    margin:  0;
    padding:  0;
    display: table-cell;
    width:  665px;
}

div.text_cell {
    background-color: white;
}

textarea.text_cell_input {
    font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif;
    font-size: inherit;
    outline: none;
    resize: none;
    width:  inherit;
    border-style: none;
    padding: 0;
    margin: 0;
    color: black;
}

div.text_cell_render {
    font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif;
    font-size: inherit;
    outline: none;
    resize: none;
    width:  inherit;
    border-style: none;
    padding: 0;
    margin: 0;
    color: black;
}

div.text_cell_render em {
    font-style: italic;
}

div.text_cell_render strong {
    font-weight: bold;
}