html, body {
    margin: 0;
    padding: 0;
}

body {
    /* Copied from fidlbolt */
    --fg: #333;
    --bg: #f0f0f0;
    --border: #666;
    --element: #ddd;
    --element-hover: #f5f5f5;
    --intense: #fff;
    --intense-hover: #e3e3e3;
    --border: #666;
    --link: #06d;

    /* Not in fidlbolt */
    --cover: rgba(255, 255, 255, 0.75);
    --underline: rgba(0, 0, 0, 0.25);
    --underline-active: rgba(0, 0, 0, 0.75);
    --shadow: rgba(0, 0, 0, 0.3);
    --tooltip-gradient: rgba(0, 0, 0, 0.1);
    --input-error: #ffaaaa;
    --highlight-1: #ffeea2;
    --highlight-2: #cfff90;
    --highlight-3: #a6ffec;
    --highlight-4: #a4dbff;
    --highlight-5: #adbcff;
    --highlight-6: #dbb8fc;
    --highlight-7: #ffb9f6;
    --highlight-8: #ffb9b9;
    --highlight-9: #ffd8a6;

    font: 16px Helvetica, sans-serif;
    color: var(--fg);
    background: var(--bg);

    /* Prevent tooltips near edges from making the document have scrollbars,
    causing jankiness when mousing onto and off that element. */
    overflow: hidden;
}

@media (prefers-color-scheme: dark) {
    body {
        /* Copied from fidlbolt */
        --fg: #eee;
        --bg: #333;
        --element: #111;
        --element-hover: #444;
        --intense: #111;
        --intense-hover: #444;
        --border: #aaa;
        --link: #6af;

        /* Not in fidlbolt */
        --cover: rgba(30, 30, 30, 0.75);
        --underline: rgba(255, 255, 255, 0.8);
        --underline-active: rgba(255, 255, 255, 1);
        --shadow: rgba(255, 255, 255, 0.5);
        --tooltip-gradient: rgba(255, 255, 255, 0.2);
        --input-error: #c75252;
        --highlight-1: #ad8e00;
        --highlight-2: #518f00;
        --highlight-3: #009474;
        --highlight-4: #286b97;
        --highlight-5: #4356a8;
        --highlight-6: #7239a8;
        --highlight-7: #971c87;
        --highlight-8: #992121;
        --highlight-9: #bd6b00;
    }
}

.part-header {
    display: flex;
    justify-content: space-between;
    background: var(--element);
    border-bottom: 1px solid var(--border);
    padding: 5px 10px 4px;
    user-select: none;
}

.part-header:hover {
    /* Prevent weird flicker when dragging splitter by disabling selection,
    and enabling only on hover. Not perfect (selection reappears when you
    hove again) but better than before. */
    user-select: auto;
}

.part-title {
    font-size: 18px;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.part-form {
    display: flex;
    gap: 20px;
    align-items: center;
}

.button--active {
    font-weight: bold;
}

.slider {
    flex: 0 0 165px;
}

.input-error {
    background: var(--input-error);
    position: absolute;
}

.highlight-1 {
    background: var(--highlight-1);
    position: absolute;
}

.highlight-2 {
    background: var(--highlight-2);
    position: absolute;
}

.highlight-3 {
    background: var(--highlight-3);
    position: absolute;
}

.highlight-4 {
    background: var(--highlight-4);
    position: absolute;
}

.highlight-5 {
    background: var(--highlight-5);
    position: absolute;
}

.highlight-6 {
    background: var(--highlight-6);
    position: absolute;
}

.highlight-7 {
    background: var(--highlight-7);
    position: absolute;
}

.highlight-8 {
    background: var(--highlight-8);
    position: absolute;
}

.highlight-9 {
    background: var(--highlight-9);
    position: absolute;
}

.has-tooltip, .has-tooltip-active {
    border-bottom: 3px solid var(--underline);
    border-radius: 0;
    box-sizing: border-box;
    position: absolute;
}

.has-tooltip-active {
    border-bottom-color: var(--underline-active);
}

/*
https://github.com/devuxd/SeeCodeRun/wiki/Ace-code-editor#i-want-to-create-a-popup-that-comes-up-whenever-the-user-hovers-over-a-piece-of-code-whats-the-best-way-to-do-that
*/
.tooltip {
    background-color: var(--bg);
    background-image: -webkit-linear-gradient(top, transparent, var(--tooltip-gradient));
    background-image: linear-gradient(to bottom, transparent, var(--tooltip-gradient));
    border: 1px solid var(--border);
    border-radius: 1px;
    box-shadow: 0 1px 2px var(--shadow);
    color: var(--fg);
    max-width: 100%;
    padding: 3px 4px;
    position: absolute;
    z-index: 999999;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    cursor: default;
    white-space: pre;
    word-wrap: break-word;
    line-height: normal;
    font-style: normal;
    font-weight: normal;
    letter-spacing: normal;
    pointer-events: none;
}

/* ========================================================================== */
/* ===== START copied from fidlbolt ========================================= */
/* ========================================================================== */
h1 {
    font-size: 40px;
    font-weight: bold;
    margin: 20px 0;
}
h2 {
    font-size: 25px;
    font-weight: bold;
    margin: 30px 0;
}
a {
    text-decoration: none;
    color: var(--link);
}
a:hover {
    text-decoration: underline;
}
p {
    margin: 0 0 1em 0;
    line-height: 1.5;
}
ul, ol {
    margin: 0;
    padding: 0 0 0 25px;
    list-style-position: outside;
}
li {
    margin: 0 0 1em 0;
    padding: 0;
    line-height: 1.5;
}
.close-list li {
    margin: 0;
}
kbd {
    display: inline-block;
    margin: 0 1px;
    padding: 2px 3px;
    border: 1px solid var(--border);
    border-radius: 3px;
    background: var(--intense);
    font: 11px "Menlo", "Consolas", monospace;
    white-space: nowrap;
}
.kbd-group {
    white-space: nowrap;
}
hr {
    border: none;
    border-bottom: 1px solid var(--border);
    margin: 30px auto;
    padding: 0;
}
button {
    font: inherit;
    color: inherit;
    outline: none;
    border: none;
    margin: 0;
}
button:focus {
    text-decoration: underline;
}
.heading-fidl {
    margin-left: 10px;
}
/* CHANGED (from heading-bolt) */
.heading-viz {
    color: var(--intense);
    -webkit-text-stroke-width: 1.5px;
    -webkit-text-stroke-color: var(--fg);
    margin-right: 5px;
}
.wrapper {
    margin: 0 20px;
    display: flex;
    flex-flow: column;
    min-height: 100vh;
}
.heading {
    text-align: center;
}
.container {
    border: 1px solid var(--border);
    border-radius: 5px;
    overflow: hidden;
    flex-grow: 1;
    margin-bottom: 20px;
    position: relative;
}
.split-container {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    width: 100%;
    height: 100%;
    display: flex;
}
.split-container--horizontal {
    flex-direction: column;
}
.split-container--vertical {
    flex-direction: row;
}
.split-item {
    display: flex;
    min-width: 0;
    flex-direction: column;
    height: 100%;
}
.split-item--first {
    flex-shrink: 0;
}
.split-item--second {
    flex-grow: 1;
}
.split-splitter {
    flex-shrink: 0;
    background: var(--border);
}
.split-splitter--vertical {
    cursor: ew-resize;
    width: 8px;
}
.split-splitter--horizontal {
    cursor: ns-resize;
    height: 8px;
}
.editor {
    font: 14px "Menlo", "Consolas", monospace;
    /* ADDED */ line-height: 18px;
    flex-grow: 1;
}
.controls-container {
    position: absolute;
    top: 23px;
    right: 20px;
}
.controls-button {
    background: var(--intense);
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 5px;
    cursor: pointer;
    display: inline-block;
    margin-left: 10px;
    user-select: none;
    -webkit-user-select: none;
}
.controls-button:hover {
    background: var(--intense-hover);
}
.modal-container {
    position: absolute;
    /* CHANGED */
    /* background: rgba(255, 255, 255, 0.5); */
    background: var(--cover);
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
}
.modal-box {
    position: absolute;
    top: 0;
    bottom: 0;
    right: 0;
    max-width: min(100% - 100px, 525px);
    padding: 0 20px 20px;
    background: var(--bg);
    border-left: 1px solid var(--border);
    overflow-y: auto;
}
.modal-box .form-control {
    margin-bottom: 12px;
}
.form-select {
    margin-left: 8px;
    width: 120px;
}
.form-checkbox {
    margin-right: 8px;
}
.form-text, .form-number {
    margin-left: 8px;
    width: 40px;
}
.form-number--invalid {
    color: #f33;
}
.form-button-group {
    margin-top: 30px;
}
.form-button {
    background: var(--intense);
    padding: 8px;
    margin: 0 5px;
    border: 1px solid var(--border);
    border-radius: 5px;
    cursor: pointer;
    display: inline-block;
    font: inherit;
    color: inherit;
    font-size: 14px;
}
.form-button:hover {
    background: var(--intense-hover);
}
/* CHANGED from 750px (because more buttons) */
@media (max-width: 850px) {
    .heading {
        text-align: left;
    }
    .status {
        left: 0;
        right: 0;
        text-align: center;
    }
}
/* ========================================================================== */
/* ===== END copied from fidlbolt =======================--================== */
/* ========================================================================== */