html,
body {
    margin: 0;
    background: var(--primary-bg);
}

body {
    font-family: 'IBM Plex Sans', system-ui, 'Helvetica', Arial, sans-serif;

    --header-height: 40px;
    --sidebar-width: 275px;

    --primary-bg: #f9fafb;
    --primary-text: #111111;
    --secondary-bg: #f3f4f6;
    --secondary-text: #9b9b9b;
    --hover-bg: #dcdfe4;
    --active-bg: #cbcfd6;
    --translucent: rgba(249, 250, 251, .8);
    --transparent: rgba(249, 250, 251, 0);
}

body.dark {
    --primary-bg: #2f3437;
    --primary-text: #ebebeb;
    --secondary-bg: #373c3f;
    --secondary-text: #a4a7a9;
    --hover-bg: #474c50;
    --active-bg: #626569;
    --translucent: rgba(47, 52, 55, .8);
    --transparent: rgba(47, 52, 55, 0);
}

#root,
.app {
    height: 100vh;
    width: 100%;
    overflow: hidden;
    background: var(--primary-bg);
    color: var(--primary-text);
}

body,
button,
input,
textarea {
    color: var(--primary-text);
    font-size: 1rem;
    font-family: 'IBM Plex Sans', system-ui, 'Helvetica', Arial, sans-serif;
}

textarea {
    -moz-tab-size : 2;
    -o-tab-size : 2;
    tab-size : 2;
}

pre {
    -moz-tab-size : 4;
    -o-tab-size : 4;
    tab-size : 4;
}

.button {
    background: transparent;
    border: 0;
    transition: background .2s;
    padding: 6px 10px;
    margin: 0;
    display: block;
    cursor: pointer;
    font-size: 1em;
    border-radius: 6px;
    position: relative;
}

a.button {
    text-decoration: none;
    color: var(--primary-text);
}

.button:hover,
.button:focus {
    background: var(--hover-bg);
    outline: none;
}

.button:active {
    background: var(--active-bg);
}

.button::after {
    content: attr(title);
    position: absolute;
    pointer-events: none;
    top: calc(100% + 6px);
    left: 50%;
    background: var(--primary-bg);
    border-radius: 6px;
    padding: 4px 8px;
    font-size: 14px;
    white-space: nowrap;
    box-shadow: 0 2px 4px rgba(0, 0, 0, .2);
    opacity: 0;
    transform: translate(-50%, -3px);
    transition: opacity .2s, transform .2s;
    transition-delay: 0s;
}

.button:hover::after {
    transition-delay: .5s;
    transform: translate(-50%, 0);
    opacity: 1;
}

.button.tooltip-left::after {
    right: 0;
    left: unset;
}

.button.tooltip-right::after {
    left: 0;
    right: unset;
}

.button.tooltip-left::after,
.button.tooltip-right::after {
    transform: translate(0, -3px);
}

.button.tooltip-left:hover::after,
.button.tooltip-right:hover::after {
    transform: translate(0, 0);
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: var(--header-height);
    padding: 0 12px;
    box-sizing: border-box;
    z-index: 10;

    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(to bottom, var(--translucent) 65%, var(--transparent));
}

header .header-left {
    max-width: calc(var(--sidebar-width) - 24px);
    flex-grow: 1;
    padding-right: 28px;
    box-sizing: border-box;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    position: relative;
}

header .toggleSidebar {
    margin-right: 4px;
    margin-left: -8px;
}

header .addFile {
    position: absolute;
    top: 50%;
    right: -8px;
    transform: translateY(-50%);
}

header h1 {
    font-size: 1em;
}

header nav {
    display: flex;
    flex-direction: row;
    align-items: center;
}

header nav .button {
    margin-left: 4px;
}

.app {
    display: flex;
    flex-direction: row;
}

.sidebar {
    background: var(--secondary-bg);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: space-between;
    width: var(--sidebar-width);
    height: 100%;
    flex-grow: 0;
    flex-shrink: 1;
    padding-top: calc(var(--header-height) + 6px);
    position: relative;
    box-sizing: border-box;
}

.sidebar .sidebar-shade {
    display: none;
}

.sidebar.hide {
    display: none;
}

.sidebar footer {
    padding: 8px 12px;
    color: var(--secondary-text);
    flex-grow: 0;
    flex-shrink: 0;
}

.sidebar footer p {
    line-height: 1.4em;
}

.sidebar footer a {
    color: var(--secondary-text);
}

.file-list {
    height: 0;
    flex-grow: 1;
    flex-shrink: 0;
    overflow-y: auto;
    width: 100%;
}

.file-list:empty::after {
    content: '📭   No files';
    white-space: pre-wrap; /* preserve space after emoji */
    display: flex;
    width: 100%;
    height: 100%;
    align-items: center;
    justify-content: center;
    color: var(--secondary-text);
}

.file-list .file-item {
    margin: 2px 12px;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    border-radius: 6px;
    width: calc(100% - 24px);
    box-sizing: border-box;
    transition: background .2s;
}

.file-list .file-item a {
    cursor: pointer;
    border-radius: 6px;
    color: var(--primary-text);
    text-decoration: none;
    display: block;
    height: 100%;
    width: 100%;
    padding: 6px 10px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-list .file-item .button {
    flex-shrink: 0;
    flex-grow: 0;
    visibility: hidden;
    padding: 4px 8px;
    margin: 2px;
}

.has-touch .file-list .file-item .button {
    visibility: visible;
}

.file-list .file-item:focus-within .button,
.file-list .file-item:hover .button {
    visibility: visible;
}

.file-list .file-item:hover,
.file-list .file-item:focus-within,
.file-list .file-item.active {
    background: var(--hover-bg);
    outline: none;
}

.file-list .file-item:active,
.file-list .file-item .button:hover,
.file-list .file-item .button:focus {
    background: var(--active-bg);
}

.editor,
.preview {
    width: 0;
    flex-grow: 1;
    flex-shrink: 1;
    box-sizing: border-box;
}

.editor-textarea,
.preview-content {
    max-width: 720px;
    display: block;
    margin-left: auto;
    margin-right: auto;
    padding: 1em;
    padding-top: calc(var(--header-height) + 6px);
    padding-bottom: 80vh;
}

.editor-textarea {
    height: 100%;
    width: 100%;
    font-size: 1em;
    font-family: 'IBM Plex Mono', 'Menlo', 'Monaco', monospace;
    line-height: 1.5em;
    box-sizing: border-box;
    border: 0;
    outline: none;
    background: var(--primary-bg);
    resize: none;
    transition: opacity .2s;
}

.editor-textarea.readonly {
    opacity: .35;
}

.preview {
    overflow-y: auto;
}

.editor + .preview {
    border-left: 1px solid var(--active-bg);
}

.preview-content:empty::after {
    content: '👀   Nothing to preview';
    white-space: pre-wrap; /* preserve space after emoji */
    display: flex;
    margin-top: 5em;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--secondary-text);
}

.preview-content p,
.preview-content li {
    line-height: 1.5em;
}

.preview-content strike {
    color: var(--secondary-text);
}

.preview-content img {
    max-width: 100%;
}

.preview-content a {
    color: var(--primary-text);
    text-decoration: underline;
}

.preview-content pre,
.preview-content code {
    background: var(--hover-bg);
    font-size: 1em;
    font-family: 'IBM Plex Mono', 'Menlo', 'Monaco', monospace;
}

.preview-content pre {
    border-radius: 4px;
    box-sizing: border-box;
    padding: 12px 8px;
    overflow-x: auto;
}

.preview-content code {
    padding: 1px 5px;
    border-radius: 4px;
}

.preview-content pre code {
    padding: 0;
}

.preview-content blockquote {
    margin: 0;
    border-left: 4px solid var(--active-bg);
    padding-left: 1em;
    display: block;
}

.button.editPreview {
    position: fixed;
    top: 6px;
    right: 6px;
}

.modal-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 20; /* above header */
}

.modal {
    background: var(--primary-bg);
    border-radius: 6px;
    padding: 1em;
    min-width: 400px;
    position: absolute;
    top: 50%;
    left: 50%;
    box-sizing: border-box;
    transform: translate(-50%, -50%);
    box-shadow: 0 6px 14px 0px rgb(0 0 0 / 24%)
}

.modal-title {
    font-weight: bold;
    margin-bottom: 1em;
}

.modal-input {
    background: var(--hover-bg);
    padding: 8px 12px;
    border: 0;
    border-radius: 6px;
    width: 100%;
    box-sizing: border-box;
    margin-bottom: 1em;
    transition: background .2s;
}

.modal-input:focus {
    background: var(--active-bg);
    outline: 0;
}

.modal-warning {
    margin: -6px 0 6px 0;
    color: var(--secondary-text);
    font-size: calc(1em - 4px);
}

.modal-buttons {
    display: flex;
    flex-direction: row-reverse;
    align-items: center;
    width: 100%;
}

.modal-buttons .button {
    margin-left: 4px;
}

.modal-buttons .button[disabled] {
    cursor: no-drop;
    color: var(--secondary-text);
}

.modal-buttons .button[disabled]:hover {
    background: none;
}

.loading {
    width: 0;
    flex-grow: 1;
    margin: 0;
    height: 3px;
    position: relative;
    background: var(--hover-bg);
    overflow: hidden;
}

@keyframes slider {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.loading::after {
    content: '';
    display: block;
    height: 100%;
    width: 60%;
    padding-right: 40%;
    background-color: #111111;
    position: relative;
    top: 0;
    left: 0;
    animation: slider 1s linear infinite;
}

@media only screen and (max-width: 600px) {
    .sidebar {
        position: absolute;
    }

    .sidebar .sidebar-shade {
        position: absolute;
        display: block;
        top: 0;
        bottom: 0;
        left: 100%;
        width: calc(100vw - var(--sidebar-width));
        background: rgba(0, 0, 0, 0.6);
        z-index: 5; /* below header */
    }

    .modal {
        min-width: calc(100vw - 2em);
    }
}