style.css

body {
    margin: 0 auto;
    max-width: 960px;
    tab-size: 4;
    font-family: arial, sans-serif;
}

pre, code, textarea {
    font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif;
}

textarea {
    width: 100%;
    padding: 3px;
    resize: vertical;
    min-height: 100px;
}

input[type="text"] {
    padding: 2px 4px;
}

input[type="text"],
textarea {
    border: solid 1px #dbdbdb;
    box-shadow: inset 0 1px 2px rgba(10, 10, 10, .1);
    border-radius: 4px 4px 0px 0px;
    font-size: 1rem;
}

input[type="text"]:hover,
textarea:hover {
    border-color: #b5b5b5;
}

ul {
    flex-wrap: wrap;
    max-width: 100%;
    list-style: none;
    flex-grow: 1;
    padding: 0px;
}

li {
    display: block;
    margin: 0;
    padding: 0;
    box-sizing: inherit;
    user-select: none;
}

.top-button {
    color: rgba(0, 0, 0, 0.7);
    font-size: 1rem;
    line-height: 1rem;
    padding: 1em 0.5em;
    margin: 0;
    cursor: pointer;
    border-radius: 0px;
    background-color: #f5f5f5;
}

.top-button:hover {
    color: #000;
    background: #ededed;
    -webkit-transition: .5s background-color ease, .5s color ease;
    transition: .5s background-color ease, .5s color ease;
}

.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #f5f5f5;
    box-sizing: border-box;
    box-shadow: 0 1px 0 rgba(12, 13, 14, 0.1), 0 1px 6px rgba(59, 64, 69, 0.1);
}

.top-bar .container {
    margin: 0 auto;
    max-width: 940px;
    display: flex;
    box-sizing: border-box;
    flex-flow: row wrap;
    align-items: center;
}

.top-bar h2 {
    flex-shrink: 0;
    display: flex;
    justify-content: flex-start;
    font-size: 1.3em;
    line-height: 1.3em;
    margin: 0px;
    cursor: default;
}

.top-bar ul {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    margin: 0px;
}

#in {
    margin-top: 70px;
}

.inline-emoji {
    font-size: 0.8em;
}

.setting-field {
    padding: 1.25rem 1.5rem;
    background-color: #f5f5f5;
    border-radius: 0px 0px 6px 6px;
}

fieldset {
    width: fit-content;
    border: 1px solid #ccc;
    margin: 25px 0 5px 0;
    padding: 5px;
}

legend {
    padding: 2px 5px;
    background-color: #ccc;
    border-radius: 2px;
    margin: -27px 0 0 -6px;
    position: absolute;
}

.subtitle {
    font-weight: normal;
}

.btn {
    margin: 10px 0px;
    padding: .5em 1em;
    font-size: 1rem;
    border-radius: 3px;
    color: #333;
    border: solid 1px #dbdbdb;
    cursor: pointer;
    text-align: center;
    white-space: nowrap;
    background-color: #fff;
}

.btn:hover {
    border-color: #b5b5b5;
    background: rgba(0, 0, 0, .03);
}

.show {
    display: none;
}

.wordwrap {
    white-space: pre-wrap;
    white-space: -moz-pre-wrap;
    white-space: -pre-wrap;
    white-space: -o-pre-wrap;
    word-wrap: break-word;
}

label {
    cursor: pointer;
    line-height: 1.5em;
}

label:hover {
    color: #555;
    text-decoration: underline;
}

form {
    margin-bottom: 0px;
}

form span {
    display: inline-block;
}

a {
    color: #4b9aff;
    text-decoration: none;
    background-color: #f0f8ff;
    padding: .5em 1em;
    border-radius: 3px;
    font-size: 0.8em;
    cursor: pointer;
}

a:hover {
    text-decoration: none;
    background: #d6e8ff;
}

.plain-link {
    color: #000;
    background: none;
    text-decoration: none;
}

.plain-link :hover {
    text-decoration: none;
    background: none;
}

p {
    line-height: 1em;
    margin: 0.5em 0em;
}

.content {
    margin: 10px;
}

.code {
    font-family: 'Consolas', Courier, monospace;
}

.inline {
    display: inline-block;
}

.disabled {
    color: #ccc;
    cursor: default;
}

.disabled label:hover {
    color: #ccc;
    text-decoration: none;
    cursor: default;
}

.checkbox input[type="checkbox"] {
    opacity: 0;
    display: none;
}

.checkbox label {
    position: relative;
    display: inline-block;
    /*16px width of fake checkbox + 6px distance between fake checkbox and text*/
    padding-left: 22px;
}

.checkbox label::before,
.checkbox label::after {
    position: absolute;
    content: "";
    /*Needed for the line-height to take effect*/
    display: inline-block;
}

/*Outer box of the fake checkbox*/

.checkbox label::before {
    height: 16px;
    width: 16px;
    border: 1px solid #9A9A9A;
    left: 0px;
    /*(24px line-height - 16px height of fake checkbox) / 2 - 1px for the border to vertically center it.*/
    top: 3px;
}

/*Checkmark of the fake checkbox*/

.checkbox label::after {
    height: 5px;
    width: 9px;
    border-left: 2px solid;
    border-bottom: 2px solid;
    transform: rotate(-45deg);
    left: 4px;
    top: 7px;
    color: #333;
}

/*Hide the checkmark by default*/

.checkbox input[type="checkbox"]+label::after {
    content: none;
}

/*Unhide on the checked state*/

.checkbox input[type="checkbox"]:checked+label::after {
    content: "";
}

/*Adding focus styles on the outer-box of the fake checkbox*/

.checkbox input[type="checkbox"]:hover+label::after {
    border-color: #888;
    outline: #ccc;
}

.checkbox input[type="checkbox"]:hover+label::before {
    outline: #888;
    border-color: #888;
    background-color: #eee;
}

.checkbox input[type="checkbox"]:disabled+label::before {
    outline: #ccc;
    border-color: #ccc;
    background-color: #fff;
    color: #ccc;
}

.checkbox input[type="checkbox"]:disabled+label::after {
    color: #888;
}

.checkbox input[type="checkbox"]:focus+label::before {
    outline: #333 auto 5px;
}

.inline-note {
    color: #888;
    margin-left: 10px;
    display: inline-block;
}

.hide {
    display: none;
}

#settings_control {
    margin: 10px 0px;
    display: inline-block;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgb(0, 0, 0);
    background-color: rgba(0, 0, 0, 0.4);
}

.modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}

.tooltip {
    cursor: pointer;
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    opacity: 0;
    width: 220px;
    background-color: #fff;
    color: #000;
    text-align: left;
    padding: .5em 1em;
    border: 1px solid #cecece;
    border-radius: 3px;
    top: 120%;
    left: 0%;
    position: absolute;
    z-index: 1;
    -webkit-transition: opacity 0.5s ease-in-out;
    transition: opacity 0.5s ease-in-out;
    box-shadow: 1px 0px 5px #bcbcbc;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}

.tooltip .tooltiptext::after {
    content: " ";
    position: absolute;
    bottom: 100%;
    left: 6%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-width: 0 0.5em 0.5em 0.5em;
    border-color: transparent transparent white transparent;
    -webkit-filter: drop-shadow(1px 2px 1px #bcbcbc);
    filter: drop-shadow(1px -1px 1px #bcbcbc);
}

.emoji {
    font-family: apple color emoji, segoe ui emoji, noto color emoji, android emoji, emojisymbols, emojione mozilla, twemoji mozilla, segoe ui symbol;
    color: #fff;
}