/* GENERATED by scripts/vendor_arena_site_css.py from arena-site — do not edit.
   Rerun the script after an arena-site style change. */

/* ---- pages/static/css/style.css (136 rules) ---- */
html.dd-arena-run:not(.dd-arena-classic) { --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'Fira Code', 'Consolas', monospace;

    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;

    
    --nav-height: 64px;
    --sidebar-width: 280px;
    --right-sidebar-width: 300px;
    
    --content-max-width: min(100%, clamp(42rem, 52vw, 64rem)); }
html.dd-arena-run:not(.dd-arena-classic)[data-theme="light"] { --color-bg: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-tertiary: #f1f5f9;
    --color-surface: #ffffff;
    --color-surface-hover: #f8fafc;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;

    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05); }
html.dd-arena-run:not(.dd-arena-classic):not([data-theme="light"]) { --color-bg: #111111;
    --color-bg-secondary: #1a1a1a;
    --color-bg-tertiary: #2a2a2a;
    --color-surface: #1a1a1a;
    --color-surface-hover: #2a2a2a;
    --color-border: #333333;
    --color-border-light: #1a1a1a;

    --color-text: #f5f5f5;
    --color-text-secondary: #a0a0a0;
    --color-text-muted: #707070;

    --color-primary: #e0e0e0;
    --color-primary-hover: #ffffff;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-layout { display: flex; min-height: calc(100vh - var(--nav-height)); position: relative; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-sidebar { width: var(--sidebar-width); min-width: 0; max-width: 450px; flex-shrink: 0; background: var(--color-bg-secondary); border-right: 1px solid var(--color-border); position: sticky; top: var(--nav-height); height: calc(100vh - var(--nav-height)); overflow-y: auto; transition: width 0.2s ease; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-sidebar.collapsed { width: 0 !important; overflow: hidden; border-right: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-sidebar.resizing { transition: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-resize-handle { position: absolute; top: 0; right: 0; width: 4px; height: 100%; cursor: col-resize; z-index: 10; background: transparent; transition: background 0.15s ease; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-resize-handle:hover,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-resize-handle.active { background: var(--chapter-color, var(--color-primary)); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-toggle { position: fixed; left: var(--spacing-sm); top: calc(var(--nav-height) + var(--spacing-md)); z-index: 101; width: 24px; height: 24px; display: none; align-items: center; justify-content: center; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-sm); cursor: pointer; transition: background 0.15s ease; color: var(--color-text-secondary); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-toggle:hover { background: var(--color-surface-hover); color: var(--color-text); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-toggle.collapsed { display: flex; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-toggle svg { width: 14px; height: 14px; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-resize-handle { position: absolute; top: 0; left: 0; width: 4px; height: 100%; cursor: col-resize; z-index: 10; background: transparent; transition: background 0.15s ease; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-resize-handle:hover,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-resize-handle.active { background: var(--color-primary); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-toggle { position: fixed; right: var(--spacing-sm); top: calc(var(--nav-height) + var(--spacing-md)); z-index: 101; width: 24px; height: 24px; display: none; align-items: center; justify-content: center; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-sm); cursor: pointer; transition: background 0.15s ease; color: var(--color-text-secondary); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-toggle:hover { background: var(--color-surface-hover); color: var(--color-text); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-toggle.collapsed { display: flex; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-toggle svg { width: 14px; height: 14px; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-header { display: flex; align-items: center; gap: var(--spacing-sm); margin-bottom: var(--spacing-md); position: relative; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-title { font-family: var(--font-heading); font-size: 0.875rem; font-weight: 600; color: var(--color-text); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-header { padding: var(--spacing-lg); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-title { font-family: var(--font-heading); font-size: 1rem; font-weight: 600; color: var(--chapter-color); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-nav { padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-md) var(--spacing-lg); margin-top: -0.25rem; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-list { list-style: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-list li { margin-bottom: 2px; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-link { display: flex; align-items: flex-start; gap: var(--spacing-xs); padding: var(--spacing-xs) var(--spacing-md); border-radius: var(--radius-md); font-size: 0.875rem; color: var(--color-text-secondary); transition: all var(--transition-fast); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-link:hover { background: var(--color-surface-hover); color: var(--color-text); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-link.active { background: color-mix(in srgb, var(--chapter-color) 10%, transparent); color: var(--chapter-color); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-number { font-family: var(--font-heading); font-weight: 600; font-size: 0.75rem; min-width: 2.5rem; opacity: 0.6; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-title { flex: 1; line-height: 1.4; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-group { margin-top: var(--spacing-sm); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-group:first-child { margin-top: 0; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-group > .section-link { font-weight: 600; color: var(--color-text); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-group > .section-link .section-number { opacity: 0.8; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-child { position: relative; padding-left: var(--spacing-lg); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-tree-connector { position: absolute; left: calc(var(--spacing-md) + 0.75rem); top: 0; bottom: 50%; width: 12px; border-left: 1.5px solid var(--color-border); border-bottom: 1.5px solid var(--color-border); border-bottom-left-radius: 4px; pointer-events: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-child:not(:last-child) .section-tree-connector,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-child:has(+ .section-child) .section-tree-connector { bottom: -50%; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-child:not(:last-child):not(:has(+ li:not(.section-child)))::before { content: ''; position: absolute; left: calc(var(--spacing-md) + 0.75rem); top: 50%; bottom: -50%; border-left: 1.5px solid var(--color-border); pointer-events: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-child:has(+ li:not(.section-child)) .section-tree-connector,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-child:last-child .section-tree-connector { bottom: 50%; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-child > .section-link { padding-left: var(--spacing-sm); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-child > .section-link .section-number { font-size: 0.7rem; min-width: 2rem; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-content { flex: 1; min-width: 0; padding: var(--spacing-xl); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .breadcrumb { margin-bottom: var(--spacing-lg); max-width: var(--content-max-width); margin-left: auto; margin-right: auto; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .breadcrumb-list { display: flex; flex-wrap: wrap; align-items: center; list-style: none; padding: 0; margin: 0; font-size: 0.875rem; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .breadcrumb-item { display: flex; align-items: center; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .breadcrumb-item:not(:last-child)::after { content: ">"; margin: 0 0.5rem; color: var(--color-text-muted); font-weight: 400; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .breadcrumb-link { color: var(--color-text-secondary); text-decoration: none; transition: color var(--transition-fast); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .breadcrumb-link:hover { color: var(--color-primary); text-decoration: underline; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .breadcrumb-current span { color: var(--color-text); font-weight: 500; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content { max-width: var(--content-max-width); margin: 0 auto; overflow-wrap: break-word; word-break: break-word; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content h1 { font-family: var(--font-heading); font-size: 2rem; font-weight: 700; color: var(--color-text); margin-bottom: var(--spacing-md); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content h2 { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 600; color: var(--color-text); margin-top: var(--spacing-2xl); margin-bottom: var(--spacing-md); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content h3 { font-family: var(--font-heading); font-size: 1.25rem; font-weight: 600; color: var(--color-text); margin-top: var(--spacing-xl); margin-bottom: var(--spacing-sm); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content h4 { font-family: var(--font-heading); font-size: 1rem; font-weight: 600; color: var(--color-text); margin-top: var(--spacing-lg); margin-bottom: var(--spacing-sm); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content h5 { font-family: var(--font-heading); font-size: 1.1rem; font-weight: 600; color: var(--color-text); margin-top: var(--spacing-lg); margin-bottom: var(--spacing-sm); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content h6 { font-family: var(--font-heading); font-size: 0.875rem; font-weight: 600; color: var(--color-text); margin-top: var(--spacing-lg); margin-bottom: var(--spacing-sm); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content p { margin-bottom: var(--spacing-md); color: var(--color-text); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 2px; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content a:hover { color: var(--color-primary-hover); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content ul,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content ol { margin-bottom: var(--spacing-md); padding-left: var(--spacing-xl); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content li { margin-bottom: var(--spacing-xs); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content blockquote { margin: var(--spacing-sm) 0; padding: var(--spacing-sm) var(--spacing-md); border-left: 4px solid var(--chapter-color, var(--color-primary)); background: var(--color-bg-secondary); border-radius: 0 var(--radius-md) var(--radius-md) 0; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content blockquote p:last-child { margin-bottom: 0; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content code { font-family: var(--font-mono); font-size: 0.875em; padding: 0.2em 0.4em; background: var(--color-bg-tertiary); border-radius: var(--radius-sm); word-break: break-all; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content pre { margin: var(--spacing-md) 0; padding: var(--spacing-md); background: var(--color-bg-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-md); white-space: pre-wrap; word-wrap: break-word; overflow-wrap: break-word; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content pre code { padding: 0; background: transparent; font-size: 0.875rem; line-height: 1.6; white-space: pre-wrap; word-wrap: break-word; overflow-wrap: break-word; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .codehilite { position: relative; background: var(--color-bg-secondary); margin: var(--spacing-md) 0; padding: var(--spacing-md); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .code-copy-button { position: absolute; top: var(--spacing-sm); right: var(--spacing-sm); display: flex; align-items: center; justify-content: center; width: 28px; height: 28px; background: var(--color-bg-tertiary); border: 1px solid var(--color-border); border-radius: var(--radius-sm); color: var(--color-text-muted); cursor: pointer; opacity: 0; transition: all var(--transition-fast); z-index: 1; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .codehilite:hover .code-copy-button { opacity: 1; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .code-copy-button:hover { background: var(--color-surface-hover); color: var(--color-text); border-color: var(--color-text-muted); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .code-copy-button.copied { background: #10b981; border-color: #10b981; color: white; opacity: 1; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .code-copy-button svg { width: 14px; height: 14px; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .codehilite pre { margin: 0; padding: 0; background: transparent; border: none; white-space: pre-wrap; word-wrap: break-word; overflow-wrap: break-word; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content table { width: 100%; margin: var(--spacing-lg) 0; border-collapse: collapse; font-size: 0.875rem; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content th,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content td { padding: var(--spacing-sm) var(--spacing-md); border: 1px solid var(--color-border); text-align: left; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content th { font-family: var(--font-heading); font-weight: 600; background: var(--color-bg-secondary); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content img { border-radius: var(--radius-md); margin: var(--spacing-lg) 0; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content hr { margin: var(--spacing-2xl) 0; border: none; border-top: 1px solid var(--color-border); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content h1 + hr { margin-top: 0; margin-bottom: var(--spacing-xl); border-top-width: 2px; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content .katex-display-wrapper { display: block; margin: var(--spacing-lg) 0; text-align: center; overflow-x: auto; overflow-y: hidden; padding: var(--spacing-sm) 0; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content .katex-display { display: block; margin: var(--spacing-md) 0; text-align: center; overflow-x: auto; overflow-y: hidden; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content .katex-display > .katex { display: inline-block; white-space: normal; text-align: left; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content .katex-display .base { display: inline-block; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content .katex .mord,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content .katex .mrel,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content .katex .mbin,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content .katex .mopen,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content .katex .mclose { display: inline; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-subsections { border-top: 1px solid var(--color-border); padding: var(--spacing-md); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .subsection-header { padding: var(--spacing-sm) var(--spacing-md); margin-bottom: var(--spacing-xs); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .subsection-header-title { font-family: var(--font-heading); font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-muted); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .subsection-list { list-style: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .subsection-list li { margin-bottom: var(--spacing-xs); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .subsection-link { display: block; padding: var(--spacing-sm) var(--spacing-md); border-radius: var(--radius-md); font-size: 0.8125rem; color: var(--color-text-secondary); transition: all var(--transition-fast); border-left: 2px solid transparent; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .subsection-link:hover { background: var(--color-surface-hover); color: var(--color-text); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .subsection-link.active { background: color-mix(in srgb, var(--chapter-color) 10%, transparent); color: var(--chapter-color); border-left-color: var(--chapter-color); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .subsection-title { display: block; line-height: 1.4; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .subsection-pager { display: flex; justify-content: space-between; align-items: stretch; gap: var(--spacing-md); margin-top: var(--spacing-2xl); margin-bottom: 3.5rem; padding-top: var(--spacing-lg); border-top: 1px solid var(--color-border); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .subsection-pager[hidden] { display: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .pager-spacer { flex: 0 1 auto; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .pager-link { display: flex; align-items: center; gap: var(--spacing-md); flex: 0 1 48%; padding: var(--spacing-md) var(--spacing-lg); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); color: var(--color-text-secondary); text-decoration: none; transition: all var(--transition-fast); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .pager-link:hover { border-color: var(--chapter-color); background: var(--color-surface-hover); color: var(--color-text); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .pager-next { margin-left: auto; text-align: right; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .pager-text { display: flex; flex-direction: column; gap: var(--spacing-xs); min-width: 0; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .pager-label { font-family: var(--font-heading); font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-muted); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .pager-title { font-size: 0.9375rem; line-height: 1.4; color: inherit; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .pager-arrow { flex-shrink: 0; color: var(--color-text-muted); transition: transform var(--transition-fast), color var(--transition-fast); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .pager-link:hover .pager-arrow { color: var(--chapter-color); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .pager-prev:hover .pager-arrow { transform: translateX(-2px); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .pager-next:hover .pager-arrow { transform: translateX(2px); }
@media (max-width: 560px) {
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .subsection-pager { flex-direction: column; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .pager-link { flex: 1 1 auto; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .pager-spacer { display: none; }
}
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-toc { border-top: 1px solid var(--color-border); padding: var(--spacing-md); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-header { padding: var(--spacing-sm) var(--spacing-md); margin-bottom: var(--spacing-xs); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-header-title { font-family: var(--font-heading); font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-muted); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-list { list-style: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-item { margin-bottom: 0; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-item.toc-level-1 { display: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-item.toc-level-2:not(:first-child) { margin-top: var(--spacing-xs); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-link { display: block; padding: var(--spacing-xs) var(--spacing-md); font-size: 0.8125rem; color: var(--color-text-secondary); transition: all var(--transition-fast); border-radius: var(--radius-sm); line-height: 1.3; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-link:hover { color: var(--color-text); background: var(--color-surface-hover); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-link { border-left: 2px solid transparent; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-link.active,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-level-4 .toc-link.active { background: color-mix(in srgb, var(--chapter-color) 10%, transparent); color: var(--chapter-color); border-left-color: var(--chapter-color); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-level-2 .toc-link { padding-left: var(--spacing-md); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-level-3 .toc-link { padding-left: calc(var(--spacing-md) + var(--spacing-sm)); font-size: 0.75rem; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-level-4 .toc-link { padding-left: calc(var(--spacing-md) + var(--spacing-md)); font-size: 0.75rem; color: var(--color-text-muted); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content details { margin: var(--spacing-md) 0; padding: var(--spacing-sm) var(--spacing-md); background: var(--color-bg-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content details summary { cursor: pointer; font-weight: 500; color: var(--color-text); padding: var(--spacing-xs) 0; list-style: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content details summary::-webkit-details-marker { display: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content details summary::before { content: '▶'; font-size: 0.75em; display: inline-block; margin-right: var(--spacing-sm); transition: transform var(--transition-fast); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content details[open] summary::before { transform: rotate(90deg); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content details[open] summary { margin-bottom: var(--spacing-sm); padding-bottom: var(--spacing-sm); border-bottom: 1px solid var(--color-border); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content details .codehilite { margin: var(--spacing-sm) 0; padding: var(--spacing-sm); border: none; background: transparent; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .exercise-info { margin: var(--spacing-md) 0; padding: var(--spacing-sm) var(--spacing-md); background: color-mix(in srgb, var(--chapter-color, var(--color-primary)) 8%, var(--color-bg-secondary)); border-left: 4px solid var(--chapter-color, var(--color-primary)); border-radius: var(--radius-md); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .exercise-info-row { display: flex; align-items: center; gap: var(--spacing-sm); margin-bottom: var(--spacing-xs); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .exercise-info-label { font-weight: 600; font-size: 0.875rem; color: var(--color-text); min-width: 90px; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .exercise-info-value { font-size: 1rem; letter-spacing: 0.1em; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .exercise-info-description { margin-top: var(--spacing-sm); padding-top: var(--spacing-sm); border-top: 1px solid var(--color-border); font-size: 0.875rem; color: var(--color-text-secondary); font-style: italic; }
@media (max-width: 768px) {
  html.dd-arena-run:not(.dd-arena-classic) { --nav-height: 56px;
        --content-max-width: 100%; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-layout { flex-direction: column; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-sidebar { width: 100% !important; min-width: 100% !important; max-width: 100% !important; position: relative; top: 0; height: auto; max-height: 50vh; overflow-y: auto; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-sidebar.collapsed { width: 100% !important; min-width: 100% !important; overflow-y: auto; border-right: none; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-toggle,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-resize-handle { display: none; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-toc { display: none; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-toggle,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-resize-handle { display: none; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-content { padding: var(--spacing-md); }
}
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .diff-col > .markdown-content { max-width: none; }

/* ---- pages/static/css/sidebar-collapse.css (2 rules) ---- */
@media (hover: hover) {
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-nav:has(.section-link.active):not(:hover):not(:has(:focus-visible))
        .section-list > li:not(:has(.section-link.active)),
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-subsections:has(.subsection-link.active):not(:hover):not(:has(:focus-visible))
        .subsection-list > li:not(:has(.subsection-link.active)) { display: none; }
}
@media (min-width: 769px) {
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-sidebar { display: flex; flex-direction: column; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-sidebar > .sidebar-header { flex: none; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-sidebar > .sidebar-nav { flex: 0 1 auto; min-height: 0; overflow-y: auto; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-sidebar > .sidebar-subsections { flex: none; max-height: 40vh; overflow-y: auto; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-sidebar > .sidebar-toc { flex: 1 1 0; min-height: 160px; flex-direction: column; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-sidebar > .sidebar-toc:not([style*="none"]) { display: flex !important; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-toc > .toc-header { flex: none; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-toc > .toc-list { flex: 1 1 0; min-height: 0; overflow-y: auto; }
}

/* ---- pages/static/css/sidebar-toggles.css (6 rules) ---- */
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-collapse-btn,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-collapse-btn,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-toggle,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-toggle { width: 28px; height: 28px; flex-shrink: 0; align-items: center; justify-content: center; padding: 0; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); color: var(--color-text-secondary); cursor: pointer; transition: background 0.15s ease, color 0.15s ease; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-collapse-btn,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-collapse-btn { display: flex; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-collapse-btn:hover,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-collapse-btn:hover,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-toggle:hover,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-toggle:hover { background: var(--color-surface-hover); color: var(--color-text); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-collapse-btn svg,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-collapse-btn svg,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-toggle svg,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-toggle svg { width: 16px; height: 16px; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .chapter-sidebar .sidebar-header { display: flex; align-items: center; justify-content: space-between; gap: var(--spacing-sm); }
@media (max-width: 768px) {
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .sidebar-collapse-btn,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .right-sidebar-collapse-btn { display: none; }
}

/* ---- pages/static/css/hud.css (29 rules) ---- */
html.dd-arena-run:not(.dd-arena-classic) { --hud-ok: #16a34a; --hud-bad: #dc2626; }
html.dd-arena-run:not(.dd-arena-classic):not([data-theme="light"]) { --hud-ok: #22c55e; --hud-bad: #ef4444; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-row { z-index: 200; display: flex; justify-content: center; align-items: stretch; gap: 10px; height: 56px; pointer-events: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-row > * { pointer-events: auto; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-box { display: flex; align-items: center; gap: 12px; padding: 0 18px; border-radius: 16px; position: relative; background: var(--color-surface); border: 1px solid var(--color-border); box-shadow: var(--shadow-lg); color: var(--color-text); font: 600 15px var(--font-body); white-space: nowrap; text-decoration: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as a.hud-box,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as button.hud-box { cursor: pointer; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as a.hud-box:hover,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as button.hud-box:hover { border-color: var(--color-text-muted); text-decoration: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-timer[hidden] { display: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-clock { font: 500 28px var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: .5px; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-timer.is-low .hud-clock { color: var(--hud-bad); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-timer.is-low { border-color: var(--hud-bad); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-timer.is-review .hud-clock { color: var(--hud-ok); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-sep { width: 1px; align-self: stretch; margin: 12px 0; background: var(--color-border); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-what { font-weight: 600; max-width: 260px; overflow: hidden; text-overflow: ellipsis; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-icon { width: 30px; height: 30px; display: grid; place-items: center; border-radius: 8px; padding: 0; cursor: pointer; background: var(--color-bg-tertiary); border: 1px solid var(--color-border); color: var(--color-text-secondary); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-icon svg { width: 12px; height: 12px; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-icon:hover:not(:disabled),
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-btn:hover:not(:disabled) { border-color: var(--color-text-muted); color: var(--color-text); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-icon:disabled,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-btn:disabled { opacity: .45; cursor: default; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-icon[hidden] { display: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-btn { height: 30px; padding: 0 11px; border-radius: 8px; cursor: pointer; font: 600 14px var(--font-body); background: var(--color-bg-tertiary); border: 1px solid var(--color-border); color: var(--color-text-secondary); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-prog { min-width: 200px; justify-content: center; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-prog svg { position: absolute; inset: -1px; width: calc(100% + 2px); height: calc(100% + 2px); overflow: visible; pointer-events: none; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-prog rect { fill: none; stroke-width: 3; x: 1.5px; y: 1.5px; width: calc(100% - 3px); height: calc(100% - 3px); rx: 16px; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-prog .rim { stroke: var(--color-border); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-prog .trace { stroke: var(--chapter-color, var(--hud-bad)); stroke-linecap: round; stroke-dasharray: 100 100; stroke-dashoffset: var(--off, 100); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-prog.met .trace { stroke: var(--hud-ok); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-prog .num { font-weight: 800; font-variant-numeric: tabular-nums; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-prog .lab { font-weight: 500; color: var(--color-text-secondary); }
@media (max-width: 760px) {
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-row { gap: 6px; height: 48px; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-box { padding: 0 12px; gap: 8px; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-clock { font-size: 22px; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-what,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-prog .lab { display: none; }
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .hud-prog { min-width: 0; }
}

/* ---- pages/static/css/notebook-cells.css (18 rules) ---- */
html.dd-arena-run:not(.dd-arena-classic) { --nb-ok: #16a34a; --nb-ok-bg: rgba(22, 163, 74, 0.10); --nb-warn: #d97706; --nb-bad: #dc2626; }
html.dd-arena-run:not(.dd-arena-classic):not([data-theme="light"]) { --nb-ok: #22c55e; --nb-ok-bg: rgba(34, 197, 94, 0.12); --nb-warn: #f59e0b; --nb-bad: #ef4444; }
html.dd-arena-run:not(.dd-arena-classic) { --nav-height: 0px; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content .codehilite.nb-cell { display: grid; grid-template-columns: 48px auto minmax(0, 1fr); padding: 0; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content .codehilite.nb-cell > pre { padding: 12px 14px; overflow-x: auto; white-space: pre; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content .codehilite.nb-cell > pre code { display: block; white-space: pre; outline: none; min-height: 1.6em; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .codehilite.nb-ok { box-shadow: inset 3px 0 0 var(--nb-ok); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .codehilite.nb-ok .nb-count { color: var(--nb-ok); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .codehilite.nb-fail { box-shadow: inset 3px 0 0 var(--nb-bad); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .codehilite.nb-fail .nb-count { color: var(--nb-bad); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .codehilite.nb-busy { box-shadow: inset 3px 0 0 var(--nb-warn); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .codehilite.nb-busy .nb-count { color: var(--nb-warn); }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .codehilite.nb-busy .nb-run svg { animation: nb-spin .9s linear infinite; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .codehilite.nb-cell .code-copy-button { z-index: 2; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .section-link.nb-done,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .subsection-link.nb-done,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-link.nb-done { color: var(--nb-ok) !important; background: var(--nb-ok-bg) !important; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .subsection-link.nb-done,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-link.nb-done { display: flex; align-items: center; gap: 6px; }
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .subsection-link.nb-done::after,
html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .toc-link.nb-done::after { content: "✓"; margin-left: auto; font-weight: 700; font-size: 12px; }
@media (max-width: 760px) {
  html.dd-arena-run:not(.dd-arena-classic) #page-arena-notebook.dd-as .markdown-content .codehilite.nb-cell { grid-template-columns: 40px auto minmax(0, 1fr); }
}