/* ── Theme: Blue Monochrome (default) ── */
:root,
[data-theme="blue"] {
    --bg-main: #e8eff5;
    --bg-wash: #f0f4f8;
    --panel: rgba(240, 244, 248, 0.92);
    --panel-strong: #f0f4f8;
    --panel-soft: rgba(240, 244, 248, 0.78);
    --border: #b0c4de;
    --border-strong: #6b8dae;
    --accent: #1e3a5f;
    --accent-dark: #0f2440;
    --ink: #1a2a3a;
    --muted: #5a7a96;
    --shadow-soft: 0 18px 50px rgba(30, 58, 95, 0.10);
    --shadow-strong: 0 28px 80px rgba(30, 58, 95, 0.16);
}

/* ── Theme: Black & White ── */
[data-theme="bw"] {
    --bg-main: #f5f5f5;
    --bg-wash: #fafafa;
    --panel: rgba(245, 245, 245, 0.92);
    --panel-strong: #f5f5f5;
    --panel-soft: rgba(250, 250, 250, 0.78);
    --border: #cccccc;
    --border-strong: #999999;
    --accent: #111111;
    --accent-dark: #000000;
    --ink: #111111;
    --muted: #666666;
    --shadow-soft: 0 18px 50px rgba(0, 0, 0, 0.08);
    --shadow-strong: 0 28px 80px rgba(0, 0, 0, 0.14);
}

html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--ink);
    background: linear-gradient(180deg, var(--bg-wash) 0%, var(--bg-main) 100%);
    overflow-x: hidden;
    overflow-y: auto;
}

body {
    display: flex;
    flex-direction: column;
}

html {
    scrollbar-width: thin;
    scrollbar-color: var(--accent) var(--bg-main);
}

::-webkit-scrollbar {
    width: 8px;
    height: 0;
}

::-webkit-scrollbar-thumb {
    background-color: var(--accent);
    border-radius: 0;
    border: none;
}

::-webkit-scrollbar-track {
    background-color: var(--bg-main);
    border-radius: 0;
}

::-webkit-scrollbar-corner {
    background-color: var(--bg-main);
}

.pane::-webkit-scrollbar-thumb,
#markdown-input::-webkit-scrollbar-thumb,
#preview-content::-webkit-scrollbar-thumb,
#custom-css-input::-webkit-scrollbar-thumb {
    background-color: var(--accent);
    border-radius: 0;
    border: none;
}

.pane::-webkit-scrollbar-track,
#markdown-input::-webkit-scrollbar-track,
#preview-content::-webkit-scrollbar-track,
#custom-css-input::-webkit-scrollbar-track {
    background-color: var(--bg-main);
    border-radius: 0;
}

.pane,
#markdown-input,
#preview-content,
#custom-css-input {
    scrollbar-width: thin;
    scrollbar-color: var(--accent) var(--bg-main);
}

.pane {
    overflow-x: hidden;
    overflow-y: auto;
}

#preview-content pre {
    overflow-x: auto;
}

.toolbar {
    position: sticky;
    top: 0;
    z-index: 40;
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 0;
    background: transparent;
    border-bottom: none;
    box-shadow: none;
    box-sizing: border-box;
}

.toolbar-deck {
    width: 100%;
    max-height: 0;
    margin-bottom: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-18px);
    transition: max-height 0.45s ease, opacity 0.3s ease, transform 0.3s ease, margin-bottom 0.3s ease;
    pointer-events: none;
}

.toolbar.is-deck-open .toolbar-deck {
    max-height: 960px;
    margin-bottom: 2px;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.toolbar-deck-surface {
    position: relative;
    overflow: hidden;
    border: none;
    border-radius: 0;
    padding: 10px 18px;
    background: var(--panel-strong);
    border-bottom: 1px solid var(--border);
    box-shadow: none;
}

.toolbar-deck-surface::before {
    display: none;
}

.toolbar-deck-grid {
    position: relative;
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.toolbar-card {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 8px;
    min-width: 0;
    padding: 0;
    border: none;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.toolbar-card-brand-link {
    margin-left: auto;
}

.toolbar-kicker,
.toolbar-title,
.toolbar-heading,
.toolbar-label {
    margin: 0;
}

.toolbar-kicker {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
}

.toolbar-heading {
    max-width: 34rem;
    font-family: "Fraunces", Georgia, serif;
    font-size: clamp(1.1rem, 2vw, 1.55rem);
    line-height: 1.2;
    color: var(--ink);
}

.toolbar-brand-meta,
.toolbar-actions-row,
.toolbar-icon-group {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.toolbar-label {
    font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
}

.deck-icon-btn {
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--panel);
    color: var(--accent);
    border: 1px solid var(--border);
    box-shadow: none;
    cursor: pointer;
}

.deck-icon-btn:hover {
    background: var(--accent);
    color: #ffffff;
    transform: none;
    box-shadow: none;
}

.deck-input {
    padding: 5px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.7);
    font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
    font-size: 0.78rem;
    color: var(--ink);
    outline: none;
    width: 100px;
}

.deck-input:focus {
    border-color: var(--accent);
}

.toolbar-card-brand-link .source-code-link {
    width: 30px;
    height: 30px;
    padding: 0;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--panel);
    color: var(--muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0;
}

.toolbar-card-brand-link .source-code-link:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.toolbar button,
.toolbar .button-group button {
    background: linear-gradient(180deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: #ffffff;
    border: none;
    padding: 5px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
    font-weight: 600;
    font-size: 0.78rem;
    letter-spacing: 0.01em;
    transition: background 0.15s ease;
    margin-left: 0;
    box-shadow: none;
}

.toolbar button:hover,
.toolbar .button-group button:hover {
    transform: none;
    filter: brightness(1.1);
    box-shadow: none;
}

.toolbar .button-group {
    display: inline-flex;
    width: fit-content;
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.68);
}

.toolbar .button-group button {
    border-radius: 0;
    margin-left: 0;
    border-left: 1px solid rgba(255, 255, 255, 0.2);
    padding: 5px 10px;
    box-shadow: none;
}

.toolbar .button-group button:first-child {
    border-left: none;
}

.toolbar .button-group button.active {
    background: linear-gradient(180deg, var(--accent-dark) 0%, var(--accent) 100%);
}

.toolbar .dropdown {
    position: relative;
    display: inline-block;
}

.toolbar .dropdown-content {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: auto;
    right: 0;
    background-color: var(--panel-strong);
    min-width: 180px;
    box-shadow: var(--shadow-soft);
    z-index: 100;
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
}

.toolbar .dropdown-content button {
    color: var(--ink);
    background: transparent;
    padding: 12px 14px;
    text-decoration: none;
    display: block;
    width: 100%;
    text-align: left;
    border: none;
    border-radius: 0;
    font-weight: 500;
    box-shadow: none;
}

.toolbar .dropdown-content button:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--accent);
    transform: none;
}

.toolbar .dropdown:hover .dropdown-content,
.toolbar .dropdown>button:focus+.dropdown-content,
.toolbar .dropdown .dropdown-content:focus-within {
    display: block;
}

.toolbar .icon-dropdown {
    display: inline-flex;
}

.toolbar-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.toolbar-field input[type="text"] {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.72);
    font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
    font-size: 0.88rem;
    color: var(--ink);
    outline: none;
    transition: border-color 0.2s ease;
}

.toolbar-field input[type="text"]:focus {
    border-color: var(--accent);
}

.toolbar-rail {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    width: 100%;
    padding: 10px 18px;
    border: none;
    border-radius: 0;
    background: linear-gradient(180deg, var(--accent) 0%, var(--accent-dark) 100%);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.toolbar-rail-copy {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.toolbar-title {
    font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.95);
}

.toolbar-subtitle {
    display: none;
}

.icon-button {
    width: 38px;
    height: 38px;
    padding: 0;
    border-radius: 50%;
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: rgba(255, 255, 255, 0.85);
    box-shadow: none;
}

.icon-button:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    transform: none;
    box-shadow: none;
}

.icon-button svg {
    width: 20px;
    height: 20px;
}

.icon-button.is-active {
    background: rgba(255, 255, 255, 0.18);
    color: #ffffff;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.container {
    display: flex;
    flex: 1 1 auto;
    height: auto;
    width: 100%;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
    --editor-pane-width: 50%;
}

.pane {
    flex: 1 1 auto;
    height: 100%;
    overflow-y: auto;
    padding: 20px;
    box-sizing: border-box;
    position: relative;
    min-width: 0;
}

.pane-resizer {
    flex: 0 0 14px;
    display: flex;
    align-items: stretch;
    justify-content: center;
    cursor: col-resize;
    background-color: var(--bg-main);
    touch-action: none;
}

.pane-resizer::before {
    content: "";
    width: 2px;
    background-color: var(--border);
    transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.pane-resizer:hover::before,
.pane-resizer.is-dragging::before,
.pane-resizer:focus::before,
body.is-resizing .pane-resizer::before {
    background-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.08);
}

.pane-resizer:focus {
    outline: none;
}

body.is-resizing,
body.is-resizing * {
    cursor: col-resize;
    user-select: none;
}

.container.editor-hidden #editor-pane,
.container.editor-hidden .pane-resizer {
    display: none;
}

#editor-pane {
    flex: 0 0 var(--editor-pane-width);
    display: flex;
    flex-direction: column;
    background-color: var(--panel-soft);
}

#markdown-input {
    flex-grow: 1;
    width: 100%;
    border: none;
    outline: none;
    resize: none;
    font-family: 'Fira Code', Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
    font-size: 14px;
    line-height: 1.6;
    color: #000;
    background-color: transparent;
    box-sizing: border-box;
    padding: 0;
}

#preview-pane {
    flex: 1 1 0;
    background-color: var(--panel-soft);
    color: var(--ink);
}

#custom-css-container {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 300px;
    max-width: 90%;
    z-index: 50;
    background-color: var(--panel-strong);
    border: 1px solid var(--border);
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
    display: none;
    flex-direction: column;
}

#custom-css-container h4 {
    margin: 0;
    padding: 8px 10px;
    background-color: var(--border);
    color: var(--accent);
    font-size: 0.9em;
    border-bottom: 1px solid var(--border);
    border-radius: 5px 5px 0 0;
}

#custom-css-input {
    flex-grow: 1;
    min-height: 150px;
    border: none;
    outline: none;
    resize: vertical;
    font-family: 'Fira Code', monospace;
    font-size: 13px;
    line-height: 1.5;
    color: #000;
    background-color: rgba(255, 255, 255, 0.7);
    padding: 10px;
    margin-bottom: 5px;
}

#custom-css-controls {
    padding: 5px 10px;
    text-align: right;
    background-color: var(--panel-soft);
    border-top: 1px solid var(--border);
    border-radius: 0 0 5px 5px;
}

#custom-css-controls button {
    padding: 4px 8px;
    font-size: 0.8em;
    margin-left: 5px;
}

#preview-content h1,
#preview-content h2,
#preview-content h3,
#preview-content h4,
#preview-content h5,
#preview-content h6 {
    margin-top: 1.2em;
    margin-bottom: 0.6em;
    font-weight: 600;
    color: #000;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.3em;
}

#preview-content h1 {
    font-size: 2em;
}

#preview-content h2 {
    font-size: 1.75em;
}

#preview-content h3 {
    font-size: 1.5em;
}

#preview-content p {
    margin-bottom: 1em;
}

#preview-content a {
    color: #0366d6;
    text-decoration: none;
}

#preview-content a:hover {
    text-decoration: underline;
}

#preview-content p code,
#preview-content li code,
#preview-content td code,
#preview-content h1 code,
#preview-content h2 code,
#preview-content h3 code,
#preview-content h4 code,
#preview-content h5 code,
#preview-content h6 code,
#preview-content a code,
#preview-content em code,
#preview-content strong code,
#preview-content blockquote code {
    font-family: 'Fira Code', monospace;
    background-color: var(--bg-main);
    color: var(--accent);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-size: 85%;
    white-space: nowrap;
    font-weight: normal;
}

#preview-content :not(pre)>code {
    color: var(--accent) !important;
    background-color: var(--bg-main);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-family: 'Fira Code', monospace;
    font-size: 85%;
}

#preview-content pre {
    background-color: var(--bg-main);
    padding: 15px;
    border-radius: 4px;
    overflow-x: auto;
    border: 1px solid var(--border);
    margin-bottom: 1em;
    line-height: 1.45;
}

#preview-content pre code.hljs {
    padding: 0;
    background-color: transparent;
    border-radius: 0;
    font-size: inherit;
    color: inherit;
}

#preview-content blockquote {
    color: #586069;
    padding: 0 1em;
    margin: 0 0 1em 0;
    background-color: transparent;
    border-left: 0.3em solid var(--border-strong);
}

#preview-content blockquote blockquote {
    margin-left: 1em;
    margin-top: 0.5em;
}

#preview-content table {
    border-collapse: collapse;
    margin-bottom: 1em;
    width: auto;
    border: 1px solid var(--border);
    font-size: 0.95em;
}

#preview-content th,
#preview-content td {
    border: 1px solid var(--border);
    padding: 0.6em 0.8em;
}

#preview-content th {
    background-color: var(--bg-main);
    font-weight: bold;
    text-align: left;
}

#preview-content tr:nth-child(even) {
    background-color: rgba(0, 0, 0, 0.03);
}

#preview-content hr {
    border: none;
    border-top: 2px solid var(--border);
    margin: 2em 0;
}

#preview-content .footnotes {
    margin-top: 2em;
    padding-top: 1em;
    border-top: 1px solid var(--border);
    font-size: 0.9em;
    color: #333;
}

#preview-content .footnotes ol {
    padding-left: 20px;
}

#preview-content .footnote-ref a,
#preview-content .footnote-backref {
    text-decoration: none;
    color: #0366d6;
}

#preview-content .footnote-backref {
    margin-left: 5px;
}

#preview-content .footnote-backref:hover {
    text-decoration: underline;
}

#preview-content .mermaid {
    text-align: center;
    margin-bottom: 1em;
    background: white;
    padding: 15px;
    border-radius: 4px;
    border: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

#preview-content .mermaid svg {
    max-width: 100%;
    height: auto;
}

#preview-content .mermaid-error {
    color: red;
    border: 1px dashed red;
    padding: 10px;
    margin-bottom: 1em;
    background-color: #ffebee;
}

.MathJax_Display,
.katex-display {
    font-size: 1.1em !important;
    outline: 0;
    margin-top: 0.8em !important;
    margin-bottom: 0.8em !important;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 10px 5px;
}

.MathJax,
.katex {
    font-size: 1em !important;
}

.katex-display>.katex {
    text-align: center;
}

button:focus,
textarea:focus,
input:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.toolbar .button-group button:focus {
    outline-offset: -1px;
}

#btn-download-pdf:disabled {
    background-color: #ccc;
    cursor: wait;
}

.mobile-toggle-buttons {
    display: none;
    margin-right: 10px;
}

.mobile-editor-visibility-btn {
    display: none;
}

.mobile-toggle-buttons button {
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    font-size: 0.85em;
    background-color: var(--accent);
    color: white;
    border: none;
    transition: background-color 0.2s ease;
}

.mobile-toggle-buttons button.active {
    background-color: var(--accent-dark);
}


.hamburger-btn {
    display: none;
    justify-content: center;
    align-items: center;
    width: 30px;
    height: 30px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    margin-right: 15px;
    z-index: 1000;
    font-size: 1.4rem;
    line-height: 1;
    position: absolute;
    left: 10px;
    top: 3px;
}


.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: -85%;
    width: 85%;
    height: 100vh;
    background: var(--panel-strong);
    z-index: 999;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
    transition: left 0.3s ease;
    padding-top: 60px;
    overflow-y: auto;
}

.mobile-menu.open {
    left: 0;
}

.mobile-menu-content {
    padding: 15px;
}

.mobile-menu-section {
    margin-bottom: 20px;
}

.mobile-menu-section label {
    display: block;
    font-weight: bold;
    color: var(--accent);
    margin-bottom: 10px;
    font-size: 1em;
}

.mobile-menu-section .button-group {
    display: flex;
    border: 1px solid var(--accent);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.mobile-menu-section .button-group button {
    flex: 1;
    margin-bottom: 0;
    border-radius: 0;
    border-left: 1px solid var(--accent-dark);
}

.mobile-menu-section .button-group button:first-child {
    border-left: none;
}

.mobile-menu-section .button-group button.active {
    background-color: var(--accent-dark);
    font-weight: bold;
}

.mobile-menu-section button {
    display: block;
    width: 100%;
    padding: 10px;
    margin-bottom: 8px;
    text-align: left;
    background-color: var(--accent);
    color: white;
    border: none;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
}

.mobile-menu-section button:hover {
    background-color: var(--accent-dark);
}

.mobile-menu-section button.active {
    background-color: var(--accent-dark);
    font-weight: bold;
}

.mobile-menu-section .button-group button.active {
    background-color: var(--accent-dark);
    font-weight: bold;
}


.autosave-indicator {
    align-self: center;
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.6);
    background-color: transparent;
    padding: 4px 0;
    border-radius: 0;
    border: none;
    display: inline-block;
    opacity: 1;
}

@media screen and (max-width: 991px) {
    .toolbar-deck-grid {
        gap: 12px;
    }

    #preview-content h1 {
        font-size: 1.8em;
    }

    #preview-content h2 {
        font-size: 1.6em;
    }

    #preview-content h3 {
        font-size: 1.4em;
    }
}

@media screen and (max-width: 768px) {

    body,
    html {
        font-size: 14px;
    }

    .toolbar-deck-surface {
        padding: 10px 14px;
    }

    .toolbar-deck-grid {
        gap: 10px;
    }

    .toolbar-rail {
        padding: 10px 14px;
    }

    .toolbar-icon-group {
        justify-content: flex-end;
    }

    .icon-button {
        width: 36px;
        height: 36px;
    }


    .container {
        flex-direction: column;
        min-height: 300px;
        margin-bottom: 0;
    }

    .pane-resizer {
        display: none !important;
    }


    .pane {
        height: 100%;
        width: 100%;
        padding: 15px;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    #editor-pane,
    #preview-pane {
        flex: 1 1 auto;
        max-height: 100%;
    }

    #markdown-input {
        padding-bottom: 50px;
    }

    #preview-content {
        padding-bottom: 60px;
        overflow-x: auto;
    }


    #preview-content .MathJax_Display,
    #preview-content .katex-display {
        max-width: 100%;
        overflow-x: auto;
        overflow-y: hidden;
        padding: 5px 0;
    }


    #preview-content table {
        display: block;
        overflow-x: auto;
        width: 100%;
    }


    #preview-content pre {
        max-width: 100%;
        overflow-x: auto;
    }

}


@media screen and (max-height: 500px) {
    .container {
        height: calc(100vh - 85px);
    }

    .pane {
        padding: 10px 15px;
    }

    .mobile-menu {
        padding-top: 45px;
    }
}

@media screen and (max-width: 480px) {
    .toolbar button,
    .toolbar .button-group button {
        font-size: 0.72rem;
        padding: 4px 8px;
    }

    #preview-content pre {
        padding: 8px;
    }

    #preview-content table {
        font-size: 0.85em;
    }

    #preview-content th,
    #preview-content td {
        padding: 0.4em 0.6em;
    }
}

/* ── Watermark (hidden on screen, visible only in print) ── */
#print-watermark {
    display: none;
}

@media print {
    /* Hide everything except the rendered preview */
    .toolbar,
    #editor-pane,
    .pane-resizer,
    #custom-css-container,
    .mobile-menu,
    .mobile-nav-bar {
        display: none !important;
    }

    html,
    body {
        height: auto !important;
        overflow: visible !important;
        display: block !important;
        background: white !important;
        color: black !important;
        margin: 0;
        padding: 0;
        font-size: 11pt;
        line-height: 1.5;
    }

    .container {
        display: block !important;
        height: auto !important;
        min-height: 0 !important;
        overflow: visible !important;
        margin: 0;
        padding: 0;
    }

    #preview-pane,
    #preview-content {
        display: block !important;
        width: 100% !important;
        height: auto !important;
        max-height: none !important;
        overflow: visible !important;
        position: static !important;
        padding: 0 !important;
        margin: 0 !important;
        border: none !important;
        box-shadow: none !important;
        background: white !important;
        color: black !important;
    }

    /* Typography & page-break rules */
    pre,
    code {
        font-size: 9pt;
        white-space: pre-wrap;
        word-wrap: break-word;
        break-inside: avoid;
    }

    table {
        width: 100%;
        border-collapse: collapse;
        break-inside: avoid;
    }

    img,
    svg {
        max-width: 100% !important;
        break-inside: avoid;
    }

    h1, h2, h3, h4, h5, h6 {
        break-after: avoid;
        break-inside: avoid;
    }

    blockquote {
        break-inside: avoid;
    }

    p {
        orphans: 3;
        widows: 3;
    }

    .page-break-before {
        break-before: page;
    }

    .page-break-after {
        break-after: page;
    }

    /* Watermark — diagonal text across every printed page */
    #print-watermark {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        z-index: 9999;
        pointer-events: none;
        font-size: 6rem;
        font-weight: 700;
        font-family: "IBM Plex Sans", sans-serif;
        color: rgba(0, 0, 0, 0.06);
        letter-spacing: 0.15em;
        text-transform: uppercase;
        display: flex;
        align-items: center;
        justify-content: center;
        transform: rotate(-35deg);
        overflow: hidden;
    }
}


#preview-content {
    overflow-wrap: break-word;
    word-wrap: break-word;
    word-break: break-word;
    -webkit-hyphens: auto;
    -ms-hyphens: auto;
    hyphens: auto;
}

#preview-content pre code {
    white-space: pre;
    word-wrap: normal;
    overflow-x: auto;
}


.source-code-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 14px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.72);
    color: var(--accent);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.86rem;
}


.toolbar-info {
    font-size: 0.82rem;
    color: var(--muted);
}