/* Markdown editor */
.md-app {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
}

.md-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 10px;
    border-bottom: 1px solid var(--border-color);
    background: var(--surface-2);
}

.md-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px;
}

.md-sep {
    width: 1px;
    height: 22px;
    background: var(--border-color);
    margin: 0 4px;
}

.md-btn,
button.md-btn {
    padding: 6px 10px;
    min-width: 32px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid transparent;
    border-radius: 6px;
    font-size: .85rem;
    font-weight: 500;
    line-height: 1.2;
}

button.md-btn:hover {
    background: var(--surface-3);
    color: var(--text-strong);
}

button.md-btn.active {
    background: var(--primary-soft);
    color: var(--primary-color);
    border-color: transparent;
}

button.md-btn.primary {
    background: var(--btn-bg);
    color: #fff;
}

button.md-btn.primary:hover {
    background: var(--btn-hover);
}

.md-layout {
    display: grid;
    grid-template-columns: minmax(0, var(--md-left, 50fr)) 7px minmax(0, var(--md-right, 50fr));
    height: clamp(460px, calc(100vh - 230px), 860px);
}

/* Draggable divider between editor and preview */
.md-splitter {
    position: relative;
    cursor: col-resize;
    background: var(--surface-2);
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    touch-action: none;
}

.md-splitter::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 3px;
    height: 32px;
    transform: translate(-50%, -50%);
    border-radius: 2px;
    background: var(--border-color);
    transition: background .15s;
}

.md-splitter:hover::after,
.md-splitter:focus-visible::after,
.md-layout.is-resizing .md-splitter::after {
    background: var(--primary-color);
}

.md-layout.is-resizing {
    cursor: col-resize;
    user-select: none;
}

.md-layout.is-resizing .md-preview,
.md-layout.is-resizing textarea {
    pointer-events: none;
}

.md-viewswitch {
    display: inline-flex;
    padding: 2px;
    gap: 2px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--surface);
}

.md-viewswitch .md-btn {
    padding: 4px 10px;
}

.md-fs-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

@media (min-width: 861px) {

    .md-layout[data-layout="write"],
    .md-layout[data-layout="preview"] {
        grid-template-columns: minmax(0, 1fr);
    }

    .md-layout[data-layout="write"] .md-output-pane,
    .md-layout[data-layout="write"] .md-splitter,
    .md-layout[data-layout="preview"] .md-editor-pane,
    .md-layout[data-layout="preview"] .md-splitter {
        display: none;
    }

    /* Comfortable reading width when the preview has the whole screen */
    .md-layout[data-layout="preview"] .md-preview {
        padding-left: max(24px, calc((100% - 900px) / 2));
        padding-right: max(24px, calc((100% - 900px) / 2));
    }

    .md-layout[data-layout="write"] #md-input {
        padding-left: max(18px, calc((100% - 900px) / 2));
        padding-right: max(18px, calc((100% - 900px) / 2));
    }
}

/* Fullscreen: the editor fills the viewport */
body.md-fs-open {
    overflow: hidden;
}

.md-app.is-fullscreen {
    position: fixed;
    inset: 0;
    z-index: 2147483000;
    display: flex;
    flex-direction: column;
    border: 0;
    border-radius: 0;
}

.md-app.is-fullscreen .md-layout {
    flex: 1;
    height: auto;
    min-height: 0;
}

.md-app.is-fullscreen .md-fs-btn {
    background: var(--primary-soft);
    color: var(--primary-color);
}

.md-pane {
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
}

.md-pane-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 6px 12px;
    border-bottom: 1px solid var(--border-color);
    font-size: .75rem;
    font-weight: 600;
    letter-spacing: .05em;
    text-transform: uppercase;
    color: var(--text-muted);
    min-height: 40px;
}

#md-input {
    flex: 1;
    min-height: 0;
    border: 0;
    border-radius: 0;
    resize: none;
    padding: 16px 18px;
    font-size: .92rem;
    line-height: 1.7;
    background: var(--surface);
    white-space: pre-wrap;
}

#md-input:focus {
    background: var(--surface);
}

#md-html {
    flex: 1;
    min-height: 0;
    border: 0;
    border-radius: 0;
    resize: none;
    padding: 16px 18px;
    font-size: .85rem;
    background: var(--surface-2);
}

.md-preview {
    flex: 1;
    min-height: 0;
    overflow: auto;
    padding: 18px 24px 40px;
}

.md-status {
    padding: 6px 12px;
    border-top: 1px solid var(--border-color);
    font-size: .78rem;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.md-pane-tabs {
    display: none;
}

/* GitHub-like rendering */
.markdown-body {
    color: var(--text-primary);
    line-height: 1.65;
    font-size: 1rem;
    word-wrap: break-word;
}

.markdown-body>*:first-child {
    margin-top: 0;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
    color: var(--text-strong);
    margin: 1.4em 0 .6em;
    line-height: 1.25;
    font-weight: 650;
}

.markdown-body h1 {
    font-size: 1.9em;
    padding-bottom: .3em;
    border-bottom: 1px solid var(--border-color);
}

.markdown-body h2 {
    font-size: 1.45em;
    padding-bottom: .3em;
    border-bottom: 1px solid var(--border-color);
}

.markdown-body h3 {
    font-size: 1.2em;
}

.markdown-body p,
.markdown-body ul,
.markdown-body ol,
.markdown-body blockquote,
.markdown-body pre,
.markdown-body table {
    margin: 0 0 1em;
}

.markdown-body ul,
.markdown-body ol {
    padding-left: 2em;
}

.markdown-body li+li {
    margin-top: .25em;
}

.markdown-body li>input[type="checkbox"] {
    margin: 0 .4em 0 -1.3em;
    vertical-align: middle;
}

.markdown-body ul:has(> li > input[type="checkbox"]) {
    list-style: none;
}

.markdown-body a {
    color: var(--primary-color);
}

.markdown-body code {
    font-family: var(--font-mono);
    font-size: .86em;
    background: var(--code-bg);
    padding: .15em .4em;
    border-radius: 4px;
}

.markdown-body pre {
    background: var(--surface-2);
    border: 1px solid var(--border-color);
    padding: 14px 16px;
    border-radius: 8px;
    overflow: auto;
    line-height: 1.5;
}

.markdown-body pre code {
    background: none;
    padding: 0;
    font-size: .85em;
}

.markdown-body blockquote {
    padding: 0 1em;
    color: var(--text-muted);
    border-left: 4px solid var(--border-color);
}

.markdown-body table {
    border-collapse: collapse;
    display: block;
    overflow-x: auto;
    max-width: 100%;
}

.markdown-body th,
.markdown-body td {
    border: 1px solid var(--border-color);
    padding: 6px 13px;
}

.markdown-body th {
    background: var(--surface-2);
    font-weight: 600;
}

.markdown-body hr {
    border: 0;
    height: 2px;
    background: var(--border-color);
    margin: 1.5em 0;
}

.markdown-body img {
    max-width: 100%;
}

/* Cheat sheet table in the content section */
.md-cheatsheet td:first-child,
.md-cheatsheet td:first-child code {
    white-space: pre;
}

@media (max-width: 860px) {
    .md-layout {
        grid-template-columns: 1fr;
        height: 70vh;
        min-height: 420px;
    }

    .md-splitter {
        display: none;
    }

    .md-app.is-fullscreen .md-layout {
        height: auto;
    }

    .md-layout[data-pane="write"] .md-output-pane,
    .md-layout:not([data-pane]) .md-output-pane,
    .md-layout[data-pane="preview"] .md-editor-pane {
        display: none;
    }

    .md-pane-tabs {
        display: flex;
        gap: 4px;
        padding: 8px 10px 0;
    }

    .md-hide-mobile {
        display: none;
    }
}

@media print {

    .site-header,
    .site-footer,
    .tool-head,
    .md-toolbar,
    .md-pane-tabs,
    .md-splitter,
    .md-editor-pane,
    .md-pane-head,
    .md-status,
    .content-sections,
    .related-tools,
    ins.adsbygoogle,
    .google-auto-placed,
    #ft-toast {
        display: none !important;
    }

    body,
    .container {
        background: #fff;
        padding: 0;
        margin: 0;
        max-width: none;
    }

    .md-app,
    .md-layout,
    .md-output-pane {
        position: static !important;
        display: block !important;
        border: 0;
        height: auto;
        overflow: visible;
    }

    .md-preview {
        overflow: visible;
        padding: 0;
        display: block !important;
    }
}

@media print {
    html:root:not([data-print]) {
        --text-primary: #1f2328;
        --text-strong: #000;
        --text-muted: #59636e;
        --surface: #fff;
        --surface-2: #f6f8fa;
        --border-color: #d0d7de;
        --code-bg: #eff1f3;
        --primary-color: #0969da;
    }
}