.canvas-md-editor-shell,
.canvas-md-editor-menu,
.canvas-md-dialog {
    --canvas-md-bg: var(--background-color, #ffffff);
    --canvas-md-bg-soft: var(--secondary-background-color, #f7f7f8);
    --canvas-md-bg-softer: var(--hover-color, #efeff1);
    --canvas-md-text: var(--text-color, #1f2937);
    --canvas-md-text-muted: var(--text-muted, #6b7280);
    --canvas-md-border: var(--border-color, rgba(15, 23, 42, 0.12));
    --canvas-md-accent: var(--accent-color, #2563eb);
    --canvas-md-danger: var(--danger-color, #dc2626);
}

.canvas-md-editor-shell {
    position: relative;
    display: flex;
    flex-direction: column;
}

.canvas-md-editor-shell.is-readonly {
    border: 0;
    border-radius: 0;
    min-height: 0;
    background: transparent;
}

.canvas-md-editor-toolbar,
.canvas-md-editor-table-toolbar {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 7px 10px;
    border-bottom: 1px solid var(--canvas-md-border);
    background: var(--canvas-md-bg);
    overflow-x: auto;
    scrollbar-width: thin;
    flex: 0 0 auto;
}

.canvas-md-editor-table-toolbar {
    display: none;
    background: var(--canvas-md-bg-soft);
}

.canvas-md-editor-table-toolbar.is-visible {
    display: flex;
}

.canvas-md-toolbar-btn {
    min-width: 32px;
    height: 32px;
    padding: 0;
    border: 1px solid transparent;
    border-radius: 6px;
    background: transparent;
    color: var(--canvas-md-text-muted);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
}

.canvas-md-toolbar-btn.has-caret {
    gap: 5px;
    padding: 0 8px;
}

.canvas-md-toolbar-btn.has-caret::after {
    content: "";
    width: 0;
    height: 0;
    border-left: 3.5px solid transparent;
    border-right: 3.5px solid transparent;
    border-top: 4px solid currentColor;
    opacity: 0.62;
}

.canvas-md-toolbar-btn.danger {
    color: var(--canvas-md-danger);
}

.canvas-md-toolbar-btn svg {
    width: 20px;
    height: 20px;
    display: block;
    flex: 0 0 auto;
}

.canvas-md-toolbar-label {
    font-size: 12.5px;
    font-weight: 600;
    white-space: nowrap;
}

.canvas-md-toolbar-btn:disabled {
    opacity: 0.42;
    cursor: default;
}

.canvas-md-toolbar-btn.is-active {
    color: var(--canvas-md-accent);
    background: color-mix(in srgb, var(--canvas-md-accent) 12%, transparent);
}

.canvas-md-toolbar-separator {
    width: 1px;
    height: 24px;
    margin: 0 3px;
    background: var(--canvas-md-border);
    flex: 0 0 auto;
}

.canvas-md-editor-block-select {
    min-width: 108px;
    justify-content: space-between;
    padding: 0 10px;
}

.canvas-md-current-block-label {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    text-align: left;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.canvas-md-toolbar-btn:focus-visible,
.canvas-md-editor-block-select:focus-visible,
.canvas-md-editor-menu-item:focus-visible,
.canvas-md-dialog-btn:focus-visible,
.canvas-md-dialog-segment button:focus-visible,
.canvas-md-dialog-field input:focus-visible,
.canvas-md-dialog-field textarea:focus-visible,
.canvas-md-dropzone:focus-visible,
.canvas-md-source-editor:focus-visible,
.canvas-md-rich-editor:focus-visible {
    outline: 2px solid var(--canvas-md-accent);
    outline-offset: 2px;
}

@media (hover: hover) and (pointer: fine) {
    .canvas-md-toolbar-btn:not(:disabled):hover,
    .canvas-md-editor-menu-item:hover,
    .canvas-md-dialog-btn:hover {
        background: var(--canvas-md-bg-softer);
        color: var(--canvas-md-text);
    }
}

.canvas-md-editor-body {
    position: relative;
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    background: var(--canvas-md-bg);
}

.canvas-md-editor-view,
.canvas-md-editor-source-view {
    flex: 1 1 auto;
    min-width: 0;
    min-height: 0;
    overflow: auto;
}

.canvas-md-rich-editor {
    min-height: 100%;
    padding: 28px clamp(18px, 4vw, 48px) 32vh;
    outline: none;
    color: var(--canvas-md-text);
    font-size: 16px;
    line-height: 1.7;
    word-break: break-word;
}

.canvas-md-editor-shell.is-format-painting .canvas-md-rich-editor {
    cursor: cell;
}

.canvas-md-editor-shell.is-readonly .canvas-md-rich-editor {
    padding: 0;
}

.canvas-md-rich-editor.is-empty::before {
    content: attr(data-placeholder);
    color: var(--canvas-md-text-muted);
    pointer-events: none;
}

.canvas-md-rich-editor > *:first-child {
    margin-top: 0;
}

.canvas-md-rich-editor p {
    margin: 0 0 0.85em;
}

.canvas-md-rich-editor h1,
.canvas-md-rich-editor h2,
.canvas-md-rich-editor h3,
.canvas-md-rich-editor h4,
.canvas-md-rich-editor h5,
.canvas-md-rich-editor h6 {
    line-height: 1.28;
    font-weight: 700;
    margin: 1.25em 0 0.45em;
}

.canvas-md-rich-editor h1 {
    font-size: 1.9em;
}

.canvas-md-rich-editor h2 {
    font-size: 1.5em;
}

.canvas-md-rich-editor h3 {
    font-size: 1.24em;
}

.canvas-md-rich-editor h4 {
    font-size: 1.1em;
}

.canvas-md-rich-editor h5 {
    font-size: 1em;
}

.canvas-md-rich-editor h6 {
    color: var(--canvas-md-text-muted);
    font-size: 0.9em;
}

.canvas-md-rich-editor a {
    color: var(--canvas-md-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.canvas-md-rich-editor blockquote {
    margin: 0 0 1em;
    padding: 2px 0 2px 16px;
    border-left: 3px solid var(--canvas-md-border);
    color: var(--canvas-md-text-muted);
}

.canvas-md-rich-editor ul,
.canvas-md-rich-editor ol {
    margin: 0 0 0.9em;
    padding-left: 1.55em;
}

.canvas-md-rich-editor li {
    margin: 0.15em 0;
}

.canvas-md-rich-editor ul.task-list,
.canvas-md-rich-editor ul.contains-task-list {
    list-style: none;
    padding-left: 1.35em;
}

.canvas-md-rich-editor li.task-list-item {
    list-style: none;
}

.canvas-md-rich-editor li.task-list-item > input[type="checkbox"] {
    width: 15px;
    height: 15px;
    margin: 0 8px 0 -1.35em;
    vertical-align: -1px;
    accent-color: var(--canvas-md-accent);
}

.canvas-md-rich-editor code {
    padding: 0.12em 0.36em;
    border: 1px solid var(--canvas-md-border);
    border-radius: 5px;
    background: var(--canvas-md-bg-soft);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.88em;
}

.canvas-md-rich-editor pre {
    margin: 0 0 1em;
    padding: 14px 16px;
    border: 1px solid var(--canvas-md-border);
    border-radius: 8px;
    background: var(--canvas-md-bg-soft);
    overflow-x: auto;
    white-space: pre-wrap;
}

.canvas-md-rich-editor pre code {
    padding: 0;
    border: 0;
    background: transparent;
    font-size: 0.92em;
}

.canvas-md-rich-editor hr {
    border: 0;
    border-top: 1px solid var(--canvas-md-border);
    margin: 1.6em 0;
}

.canvas-md-rich-editor img,
.canvas-md-inline-image {
    display: block;
    max-width: min(100%, 620px);
    height: auto;
    border-radius: 8px;
    margin: 10px 0;
}

.canvas-md-editor-table-wrap {
    overflow-x: auto;
    margin: 0 0 1em;
    border: 1px solid var(--canvas-md-border);
    border-radius: 8px;
}

.canvas-md-rich-editor table {
    width: 100%;
    min-width: max-content;
    border-collapse: collapse;
    font-size: 0.95em;
}

.canvas-md-rich-editor th,
.canvas-md-rich-editor td {
    min-width: 54px;
    border: 1px solid var(--canvas-md-border);
    padding: 8px 11px;
    text-align: left;
    vertical-align: top;
}

.canvas-md-rich-editor th {
    background: var(--canvas-md-bg-soft);
    font-weight: 650;
}

.canvas-md-rich-editor th:focus,
.canvas-md-rich-editor td:focus {
    outline: 2px solid var(--canvas-md-accent);
    outline-offset: -2px;
}

.canvas-md-rich-editor th.cell-active,
.canvas-md-rich-editor td.cell-active {
    background: color-mix(in srgb, var(--canvas-md-accent) 12%, transparent);
}

.canvas-md-rich-editor img.is-selected {
    outline: 2px solid var(--canvas-md-accent);
    outline-offset: 3px;
}

.canvas-md-rich-editor .mermaid-block {
    margin: 0 0 1em;
}

.canvas-md-rich-editor .mermaid-diagram {
    min-height: 120px;
    display: grid;
    place-items: center;
    overflow: auto;
    border: 1px solid var(--canvas-md-border);
    border-radius: 8px;
    background: var(--canvas-md-bg-soft);
    color: var(--canvas-md-text-muted);
    padding: 16px;
}

.canvas-md-rich-editor .mermaid-diagram svg {
    max-width: 100%;
    height: auto;
}

.canvas-md-rich-editor .mermaid-diagram.mermaid-diagram-error {
    color: var(--canvas-md-danger);
}

.canvas-md-rich-editor.is-dragging-image {
    box-shadow: inset 0 0 0 2px var(--canvas-md-accent);
}

.canvas-md-source-shell {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    width: 100%;
    height: 100%;
    min-height: min(72vh, 780px);
    background: var(--canvas-md-bg);
}

.canvas-md-source-shell.uses-codemirror {
    display: block;
}

.canvas-md-source-shell.uses-codemirror .canvas-md-source-gutter {
    display: none;
}

.canvas-md-source-gutter {
    min-width: 44px;
    border-right: 1px solid var(--canvas-md-border);
    background: var(--canvas-md-bg-soft);
    color: var(--canvas-md-text-muted);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 14px;
    line-height: 1.6;
    overflow: hidden;
    padding: 18px 9px;
    text-align: right;
    user-select: none;
}

.canvas-md-source-gutter span {
    display: block;
    min-height: 1.6em;
}

.canvas-md-source-editor {
    display: block;
    width: 100%;
    height: 100%;
    min-height: min(72vh, 780px);
    resize: none;
    border: 0;
    outline: none;
    padding: 18px;
    background: var(--canvas-md-bg);
    color: var(--canvas-md-text);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 14px;
    line-height: 1.6;
    tab-size: 2;
}

.canvas-md-source-shell.has-bracket-match .canvas-md-source-editor {
    box-shadow: inset 3px 0 0 color-mix(in srgb, var(--canvas-md-accent) 72%, transparent);
}

.canvas-md-source-shell.has-bracket-mismatch .canvas-md-source-editor {
    box-shadow: inset 3px 0 0 var(--canvas-md-danger);
}

.canvas-md-source-shell .CodeMirror {
    height: 100%;
    min-height: min(72vh, 780px);
    background: var(--canvas-md-bg);
    color: var(--canvas-md-text);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 14px;
    line-height: 1.6;
}

.canvas-md-source-shell .CodeMirror-gutters {
    border-right: 1px solid var(--canvas-md-border);
    background: var(--canvas-md-bg-soft);
}

.canvas-md-source-shell .CodeMirror-linenumber {
    color: var(--canvas-md-text-muted);
}

.canvas-md-editor-menu {
    position: fixed;
    z-index: 3100;
    min-width: 170px;
    max-width: min(92vw, 320px);
    padding: 6px;
    border: 1px solid var(--canvas-md-border, rgba(15, 23, 42, 0.12));
    border-radius: 8px;
    background: var(--canvas-md-bg, #fff);
    color: var(--canvas-md-text, #1f2937);
    box-shadow: 0 12px 34px rgba(15, 23, 42, 0.16);
}

.canvas-md-editor-menu-item {
    display: flex;
    align-items: center;
    gap: 9px;
    width: 100%;
    border: 0;
    border-radius: 6px;
    background: transparent;
    color: inherit;
    cursor: pointer;
    padding: 8px 10px;
    text-align: left;
    font: inherit;
    font-size: 13px;
}

.canvas-md-editor-menu-item svg {
    width: 16px;
    height: 16px;
    flex: 0 0 auto;
    fill: currentColor;
    opacity: 0.82;
}

.canvas-md-editor-menu-label {
    padding: 6px 10px 3px;
    color: var(--canvas-md-text-muted);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.canvas-md-editor-menu-separator {
    height: 1px;
    margin: 5px 2px;
    background: var(--canvas-md-border);
}

.canvas-md-editor-swatches {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 6px;
    min-width: 220px;
}

.canvas-md-editor-swatch {
    aspect-ratio: 1;
    width: 100%;
    border: 1px solid var(--canvas-md-border);
    border-radius: 6px;
    cursor: pointer;
}

.canvas-md-editor-swatch.none {
    display: grid;
    place-items: center;
    background: var(--canvas-md-bg-soft);
    color: var(--canvas-md-text-muted);
}

.canvas-md-editor-swatch.none svg {
    width: 15px;
    height: 15px;
    fill: currentColor;
}

.canvas-md-editor-grid-pick {
    display: grid;
    grid-template-columns: repeat(10, 20px);
    gap: 3px;
    margin: 4px 0 8px;
}

.canvas-md-editor-grid-cell {
    width: 20px;
    height: 20px;
    border: 1px solid var(--canvas-md-border);
    border-radius: 3px;
    background: var(--canvas-md-bg-soft);
    cursor: pointer;
}

.canvas-md-editor-grid-cell.on {
    border-color: var(--canvas-md-accent);
    background: color-mix(in srgb, var(--canvas-md-accent) 16%, transparent);
}

.canvas-md-editor-grid-size {
    margin-bottom: 6px;
    color: var(--canvas-md-text-muted);
    font-size: 12.5px;
    text-align: center;
}

.canvas-md-table-toolbar-title {
    padding: 0 6px;
    color: var(--canvas-md-text-muted);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.canvas-md-dialog-overlay {
    position: fixed;
    inset: 0;
    z-index: 3200;
    display: grid;
    place-items: center;
    padding: 16px;
    background: rgba(15, 23, 42, 0.42);
}

.canvas-md-dialog {
    width: min(460px, 100%);
    max-height: min(88vh, 640px);
    overflow: auto;
    border: 1px solid var(--canvas-md-border, rgba(15, 23, 42, 0.12));
    border-radius: 8px;
    background: var(--canvas-md-bg, #fff);
    color: var(--canvas-md-text, #1f2937);
    box-shadow: 0 20px 50px rgba(15, 23, 42, 0.25);
}

.canvas-md-dialog-title {
    padding: 16px 18px 6px;
    font-size: 15px;
    font-weight: 700;
}

.canvas-md-dialog-body {
    padding: 8px 18px 4px;
}

.canvas-md-dialog-field {
    display: block;
    margin-bottom: 12px;
    color: var(--canvas-md-text-muted, #6b7280);
    font-size: 12px;
    font-weight: 600;
}

.canvas-md-dialog-field span {
    display: block;
    margin-bottom: 5px;
}

.canvas-md-dialog-tip {
    display: block;
    margin-top: 5px;
    color: var(--canvas-md-text-muted, #6b7280);
    font-size: 11.5px;
    font-weight: 500;
}

.canvas-md-dialog-field input,
.canvas-md-dialog-field textarea {
    width: 100%;
    min-height: 38px;
    border: 1px solid var(--canvas-md-border, rgba(15, 23, 42, 0.12));
    border-radius: 6px;
    background: var(--canvas-md-bg-soft, #f7f7f8);
    color: var(--canvas-md-text, #1f2937);
    padding: 8px 10px;
    font: inherit;
    font-size: 14px;
}

.canvas-md-dialog-segment {
    display: inline-flex;
    gap: 2px;
    margin-bottom: 12px;
    border: 1px solid var(--canvas-md-border, rgba(15, 23, 42, 0.12));
    border-radius: 8px;
    background: var(--canvas-md-bg-soft, #f7f7f8);
    padding: 3px;
}

.canvas-md-dialog-segment button {
    min-height: 30px;
    border: 0;
    border-radius: 6px;
    background: transparent;
    color: var(--canvas-md-text-muted, #6b7280);
    cursor: pointer;
    padding: 0 12px;
    font: inherit;
    font-size: 13px;
    font-weight: 650;
}

.canvas-md-dialog-segment button.is-active {
    background: var(--canvas-md-bg, #fff);
    color: var(--canvas-md-text, #1f2937);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.08);
}

.canvas-md-dropzone {
    width: 100%;
    min-height: 92px;
    border: 1.5px dashed var(--canvas-md-border, rgba(15, 23, 42, 0.12));
    border-radius: 8px;
    background: var(--canvas-md-bg-soft, #f7f7f8);
    color: var(--canvas-md-text-muted, #6b7280);
    cursor: pointer;
    padding: 14px;
    text-align: center;
    font: inherit;
    font-size: 13px;
    font-weight: 650;
}

.canvas-md-dropzone.is-dragging {
    border-color: var(--canvas-md-accent, #2563eb);
    background: color-mix(in srgb, var(--canvas-md-accent, #2563eb) 12%, var(--canvas-md-bg-soft, #f7f7f8));
    color: var(--canvas-md-text, #1f2937);
}

.canvas-md-dialog-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 14px 18px 18px;
}

.canvas-md-dialog-btn {
    min-height: 36px;
    border: 1px solid var(--canvas-md-border, rgba(15, 23, 42, 0.12));
    border-radius: 6px;
    background: var(--canvas-md-bg, #fff);
    color: var(--canvas-md-text, #1f2937);
    cursor: pointer;
    padding: 0 14px;
    font: inherit;
    font-size: 13px;
    font-weight: 650;
}

.canvas-md-dialog-btn.primary {
    border-color: var(--canvas-md-accent, #2563eb);
    background: var(--canvas-md-accent, #2563eb);
    color: #fff;
}

.canvas-md-dialog-btn.danger {
    margin-right: auto;
    border-color: color-mix(in srgb, var(--canvas-md-danger, #dc2626) 35%, var(--canvas-md-border, rgba(15, 23, 42, 0.12)));
    color: var(--canvas-md-danger, #dc2626);
}

.canvas-md-reference-toolbar {
    --canvas-md-reference-bg: #ffffff;
    --canvas-md-reference-border: #bfdbfe;
    --canvas-md-reference-shadow: 0 18px 38px rgba(15, 23, 42, 0.18);
    --canvas-md-reference-btn-bg: #2563eb;
    --canvas-md-reference-btn-hover-bg: #1d4ed8;
    --canvas-md-reference-btn-text: #ffffff;
    --canvas-md-reference-btn-hover-text: #ffffff;
    position: absolute;
    z-index: 20;
}

[data-mode="dark"] .canvas-md-reference-toolbar {
    --canvas-md-reference-bg: #202124;
    --canvas-md-reference-border: #3b4658;
    --canvas-md-reference-shadow: 0 18px 42px rgba(0, 0, 0, 0.5);
    --canvas-md-reference-btn-bg: #7ab7ff;
    --canvas-md-reference-btn-hover-bg: #9ccbff;
    --canvas-md-reference-btn-text: #0b1220;
    --canvas-md-reference-btn-hover-text: #08111f;
}

.canvas-md-reference-toolbar .canvas-md-toolbar-btn {
    background-color: var(--canvas-md-reference-bg);
    border-color: var(--canvas-md-reference-border);
    box-shadow: var(--canvas-md-reference-shadow);
    transition: background-color 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease, color 0.16s ease, transform 0.16s ease;
}

.canvas-md-reference-toolbar .canvas-md-reference-action {
    gap: 7px;
    min-width: 0;
    padding: 0 11px;
    border-radius: 10px;
    background-color: var(--canvas-md-reference-btn-bg);
    color: var(--canvas-md-reference-btn-text);
    font-weight: 700;
}

@media (hover: hover) and (pointer: fine) {
    .canvas-md-reference-toolbar .canvas-md-reference-action:not(:disabled):hover {
        background-color: var(--canvas-md-reference-btn-hover-bg);
        color: var(--canvas-md-reference-btn-hover-text);
        box-shadow: 0 8px 18px rgba(37, 99, 235, 0.25);
        transform: translateY(-1px);
    }
}

.canvas-md-inline-toolbar .canvas-md-reference-action svg,
.canvas-md-reference-toolbar .canvas-md-reference-action svg {
    width: 18px;
    height: 18px;
}

@media (max-width: 680px) {
    .canvas-md-editor-shell {
        min-height: 70vh;
        border-left: 0;
        border-right: 0;
        border-radius: 0;
    }

    .canvas-md-editor-toolbar,
    .canvas-md-editor-table-toolbar {
        padding: 6px 8px;
    }

    .canvas-md-rich-editor {
        padding: 20px 16px 32vh;
    }

    .canvas-md-editor-block-select {
        min-width: 112px;
    }
}

@media (pointer: coarse) {
    .canvas-md-toolbar-btn {
        min-width: 38px;
        height: 38px;
    }

}