custom.css

@import url("base.css"); /* Happy16 Light theme */

body {background-color: #f9f9f9;}

.container { min-width:60% !important; }

.output_svg div {
    width: 100% !important;
    height: 100% !important;
}

div.prompt.input_prompt {
    font-weight: normal;
    font-size: 10pt;
    color: #ff0000;
}

.notebook_app {
    background-color: #191919;
}

div.prompt {
    padding: 0.6em;
    min-width: 13ex;
    font-size: 10pt;
}

/* label tweaks */
.widget-label {
    margin-right: 8px;
}

/* radio tweaks */
label.radio {
    padding-bottom: 10px;
}

input[type="radio"] {
    cursor: pointer;
    -webkit-appearance: none;
    border: 6px solid #e9e9e9;
    border-radius: 15px;
    position: relative;
    left: -9px;
    outline: none;
    top: -0.5em;
}

input[type="radio"]:after {
    content: "";
    display: block;
    height: 6px;
    width: 6px;
    border-radius: 20px;
    border: 6px solid #e0e0e0;
}

input[type="radio"]:checked:after {
    border-color: #de143d;
}

input[type="radio"]:focus {
    outline: none;
}
/* end of radio tweaks */

/* slider tweaks */

.widget-hslider .slider-container .ui-slider .ui-slider-handle {
    border-radius: 0 !important;
    border: 0;
    background: #de143d;
}

.ui-slider-handle:focus {
    outline: none
}

.widget-hslider .slider-container {
    border: 0 !important;
    background-color: #e0e0e0 !important;
    border-radius: 0 !important;
}
/* end of slider tweaks */

/* checkbox tweaks */
input[type="checkbox"] {
    cursor: pointer;
    -webkit-appearance: none;
    border: 6px solid #e9e9e9;
    position: relative;
    outline: none;
    top: -0.5em;
    margin-right: 10px;
}

input[type="checkbox"]:after {
    content: "";
    display: block;
    height: 6px;
    width: 6px;
    border: 6px solid #e0e0e0;
}

input[type="checkbox"]:checked:after {
    border-color: #de143d;
}

input[type="checkbox"]:focus {
    outline: none;
}
/* end of checkbox tweaks */

/* multiple selector tweaks */
.widget-listbox.form-control {
    border: 0px;
    border-radius: 0;
}

select.widget-listbox.form-control:focus {
    outline: none
}
/* end of multiple selector tweaks */

.rendered_html table, .rendered_html th, .rendered_html tr, .rendered_html td {
    border: 2px solid white;
    background-color: #ebebeb !important;
}

.rendered_html th {
    color: #de143d;
}