/* CSS Cascade Layers - establishes explicit precedence order.
   theme.css loads into @layer theme. Unlayered styles (print) win over all layers. */
@layer reset, vendors, base, components, templates, theme;

/* Highlight.js atom-one-dark theme v11.9.0 (inlined for layer control)
   Source: https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/atom-one-dark.min.css */
@layer vendors {
    pre code.hljs{display:block;overflow-x:auto;padding:1em}
    code.hljs{padding:3px 5px}
    .hljs{color:#abb2bf;background:#282c34}
    .hljs-comment,.hljs-quote{color:#5c6370;font-style:italic}
    .hljs-doctag,.hljs-formula,.hljs-keyword{color:#c678dd}
    .hljs-deletion,.hljs-name,.hljs-section,.hljs-selector-tag,.hljs-subst{color:#e06c75}
    .hljs-literal{color:#56b6c2}
    .hljs-addition,.hljs-attribute,.hljs-meta .hljs-string,.hljs-regexp,.hljs-string{color:#98c379}
    .hljs-attr,.hljs-number,.hljs-selector-attr,.hljs-selector-class,.hljs-selector-pseudo,.hljs-template-variable,.hljs-type,.hljs-variable{color:#d19a66}
    .hljs-bullet,.hljs-link,.hljs-meta,.hljs-selector-id,.hljs-symbol,.hljs-title{color:#61aeee}
    .hljs-built_in,.hljs-class .hljs-title,.hljs-title.class_{color:#e6c07b}
    .hljs-emphasis{font-style:italic}
    .hljs-strong{font-weight:700}
    .hljs-link{text-decoration:underline}
}

@layer reset {
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    /* Loading state - hide content until app initializes to prevent FOUC */
    body.loading {
        visibility: hidden;
    }
}

@layer base {

:root {
    --bg-primary: #f8f6f3;
    --bg-secondary: #ffffff;
    --bg-accent: #1a1a1a;
    --text-primary: #1a1a1a;
    --text-secondary: #5a5a5a;
    --text-muted: #8a8a8a;
    --border: #e0ddd8;
    --border-dark: #c5c2bd;
    --accent: #c45d3a;
    --accent-hover: #a84d2e;
    --shadow: rgba(26, 26, 26, 0.08);
    --note-bg: #fffef9;
    --note-border: #e8e4d9;
    --link-color: #6251b5;
    --link-hover: #4e4199;

    /* Code theme colors */
    --code-bg: #1a3a52;
    --code-text: #e0e6ed;
}

body {
    font-family: 'Source Sans 3', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    background: var(--bg-accent);
    color: var(--bg-primary);
    padding: 2.5rem 2rem;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(196, 93, 58, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(196, 93, 58, 0.1) 0%, transparent 40%);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

h1 {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    margin-bottom: 0.5rem;
}

.tagline {
    font-weight: 300;
    color: rgba(248, 246, 243, 0.7);
    font-size: 1rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

} /* end @layer base */

@layer components {

/* Shared markdown typography - base styles for rendered markdown content */
.md-content {
    line-height: 1.7;
    font-size: 0.925rem;
    color: var(--text-secondary);
}
.md-content h1 { font-family: 'Playfair Display', serif; font-size: 1.5rem; margin-bottom: 0.75rem; color: var(--text-primary); }
.md-content h2 { font-family: 'Playfair Display', serif; font-size: 1.25rem; margin: 1.25rem 0 0.5rem; color: var(--text-primary); }
.md-content h3 { font-family: 'Playfair Display', serif; font-size: 1.1rem; margin: 1rem 0 0.5rem; color: var(--text-primary); }
.md-content p { margin-bottom: 0.875rem; }
.md-content ul, .md-content ol { margin: 0.875rem 0; padding-left: 1.5rem; }
.md-content li { margin-bottom: 0.375rem; }
.md-content code { font-family: 'Consolas', 'Monaco', monospace; background: #fff; padding: 0.125rem 0.375rem; border-radius: 3px; font-size: 0.9em; }
.md-content pre { background: #fff; padding: 0.75rem; overflow-x: auto; margin: 0.875rem 0; border-radius: 4px; border: 1px solid #e8e4dc; }
.md-content pre code { background: none; padding: 0; }
.md-content blockquote { border-left: 3px solid var(--accent); padding-left: 1rem; margin: 0.875rem 0; color: var(--text-secondary); font-style: italic; }
.md-content a { color: var(--link-color); text-decoration: none; }
.md-content a:hover { color: var(--link-hover); text-decoration: underline; }
.md-content img { max-width: 100%; height: auto; border-radius: 4px; margin: 0.5rem 0; }
.md-content table { border-collapse: collapse; margin: 0.875rem 0; width: 100%; font-size: 0.9em; }
.md-content table th,
.md-content table td { border: 1px solid var(--border); padding: 0.5rem 0.75rem; text-align: left; }
.md-content table th { background: var(--bg-primary); font-weight: 600; }
.md-content table tr:nth-child(even) { background: #fafafa; }
/* Override highlight.js dark theme for markdown content */
.md-content .hljs { background: transparent; color: var(--text-primary); }

.toolbar {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.toolbar-group {
    display: flex;
    gap: 0.5rem;
}

.btn {
    font-family: 'Source Sans 3', sans-serif;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    padding: 0.75rem 1.5rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-dark);
}

.btn-secondary:hover {
    background: var(--bg-primary);
    border-color: var(--text-primary);
}

.btn-note {
    background: var(--note-bg);
    color: var(--text-primary);
    border: 1px solid var(--note-border);
}

.btn-note:hover {
    background: #f5f3e8;
    border-color: var(--accent);
}

.btn-code {
    background: #f0f4f0;
    color: var(--text-primary);
    border: 1px solid #c8d4c8;
}

.btn-code:hover {
    background: #e4ebe4;
    border-color: #4a7c4a;
}

.btn-icon {
    font-size: 1.1rem;
}

main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.empty-state {
    text-align: center;
    padding: 6rem 2rem;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    opacity: 0.3;
}

.empty-state h2 {
    font-family: 'Playfair Display', serif;
    font-weight: 400;
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.section {
    margin-bottom: 3rem;
    animation: fadeIn 0.4s ease;
    position: relative;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--bg-accent);
    position: relative;
}

.section-delete {
    position: absolute;
    left: -0.5rem;
    top: -0.5rem;
    width: 24px;
    height: 24px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 50%;
    font-size: 0.75rem;
    cursor: pointer;
    opacity: 0;
    transition: all 0.2s;
    color: var(--text-muted);
}

.section:hover .section-delete {
    opacity: 1;
}

.section-delete:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.section-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.75rem;
    font-weight: 400;
    flex: 1;
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.section-title input {
    font-family: inherit;
    font-size: inherit;
    font-weight: inherit;
    border: none;
    background: transparent;
    outline: none;
    padding: 0.25rem 0;
    border-bottom: 2px solid transparent;
}

.section-title input:focus {
    border-bottom-color: var(--accent);
}

.section-count {
    font-family: 'Source Sans 3', sans-serif;
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-muted);
    margin-left: 0.75rem;
}

.section-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-small {
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
}

.github-branch-select {
    padding: 0.3rem 0.5rem;
    font-size: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    max-width: 160px;
}

.btn-new-folder {
    opacity: 0.6;
    font-size: 0.75rem;
}

.btn-new-folder:hover {
    opacity: 1;
}

.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.items-grid.collapsed {
    display: none;
}

/* Compact cards mode - smaller cards for large codebases */
body.compact-cards .items-grid,
body.compact-cards .subdir-items {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.75rem;
}

body.compact-cards .card {
    min-height: 120px;
}

body.compact-cards .card-preview {
    height: 80px;
}

body.compact-cards .card-title {
    font-size: 0.75rem;
}

body.compact-cards .card-meta {
    font-size: 0.6rem;
    padding: 0.25rem 0.5rem;
}

body.compact-cards .subdir-header {
    padding: 0.35rem 0.5rem;
    border-radius: 4px;
}

body.compact-cards .subdir-name {
    font-size: 0.75rem;
}

body.compact-cards .subdir-toggle {
    font-size: 0.7rem;
}

body.compact-cards .subdir-count {
    font-size: 0.65rem;
}

body.compact-cards .subdir-content {
    margin-top: 0.35rem;
}

body.compact-cards .subdir-node {
    margin-bottom: 0.35rem;
}

body.compact-cards .section-header {
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
}

body.compact-cards .section-title {
    font-size: 1.1rem;
}

body.compact-cards .section-count {
    font-size: 0.7rem;
}

body.compact-cards .section-toggle {
    font-size: 0.8rem;
}

/* Subsection headers for grouped items within a section */
.subsection-header {
    grid-column: 1 / -1;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--text-primary);
    padding: 1.25rem 0 0.75rem;
    margin-top: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.subsection-header::before,
.subsection-header::after {
    content: '';
    flex: 0 0 2rem;
    height: 2px;
    background: var(--border);
}

.subsection-header:first-child {
    margin-top: 0;
    padding-top: 0;
}

/* Collapsible subdirectory nodes (progressive disclosure) */
.subdir-node {
    grid-column: 1 / -1;
    margin-top: 1rem;
    /* Visual indentation based on depth */
    margin-left: calc(var(--subdir-depth, 0) * 1.5rem);
}

.subdir-node:first-child {
    margin-top: 0;
}

.subdir-node {
    position: relative;
}

.subdir-delete {
    position: absolute;
    left: -0.5rem;
    top: 0.5rem;
    width: 20px;
    height: 20px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 50%;
    font-size: 0.7rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s ease;
    z-index: 1;
}

.subdir-node:hover > .subdir-delete {
    opacity: 1;
}

.subdir-delete:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.subdir-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--surface-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: background-color 0.15s ease;
}

.subdir-header-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    cursor: pointer;
}

.subdir-header:hover {
    background: var(--surface-tertiary, var(--surface-secondary));
}

.subdir-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: transform 0.2s ease;
    padding: 0.125rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.subdir-toggle:hover {
    color: var(--text-primary);
}

.subdir-toggle.collapsed {
    transform: rotate(-90deg);
}

.subdir-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.01em;
}

.subdir-count {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-left: auto;
}

.subdir-content {
    margin-top: 0.75rem;
}

.subdir-content.collapsed {
    display: none;
}

/* Items grid within subdirectory */
.subdir-items {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

/* Focus mode breadcrumb */
.focus-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    background: var(--surface-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.95rem;
}

.breadcrumb-path {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex: 1;
}

.breadcrumb-link {
    color: var(--accent);
    text-decoration: none;
    padding: 0.125rem 0.25rem;
    border-radius: 4px;
    transition: background-color 0.15s;
}

.breadcrumb-link:hover {
    background: var(--bg-accent);
    text-decoration: underline;
}

.breadcrumb-sep {
    color: var(--text-muted);
    margin: 0 0.125rem;
}

.breadcrumb-current {
    font-weight: 600;
    color: var(--text-primary);
}

.breadcrumb-clear {
    background: none;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1;
    transition: all 0.15s;
}

.breadcrumb-clear:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* Focus button on sections and subdirs */
.btn-focus {
    background: none;
    border: 1px solid transparent;
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 1rem;
    opacity: 0;
    transition: all 0.15s;
}

.section-header:hover .btn-focus,
.subdir-header:hover .btn-focus {
    opacity: 1;
}

.btn-focus:hover {
    background: var(--bg-accent);
    border-color: var(--border);
    color: var(--accent);
}

.btn-focus-subdir {
    margin-left: auto;
    font-size: 0.9rem;
    padding: 0.125rem 0.375rem;
}

.section-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-muted);
    transition: transform 0.3s ease;
    padding: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.section-toggle:hover {
    color: var(--text-primary);
}

.section-toggle.collapsed {
    transform: rotate(-90deg);
}

.form-group textarea.code-editor {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    min-height: 200px;
    padding: 1rem;
    background: #1e1e1e;
    color: #ffffff;
    border: 1px solid var(--border);
    border-radius: 4px;
    resize: vertical;
    tab-size: 4;
    font-weight: 500;
}

.form-group textarea.code-editor::placeholder {
    color: #666;
    font-weight: 300;
    opacity: 0.7;
}

.form-group textarea.code-editor:focus {
    outline: none;
    border-color: #4a7c4a;
    background: #1e1e1e;
}

/* CodeMirror editor container */
.codemirror-container {
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
    min-height: 200px;
    max-height: 500px;
}

.codemirror-container .cm-editor {
    height: 100%;
    min-height: 200px;
    max-height: 500px;
    font-size: 0.9rem;
}

/* Markdown editor: taller, more writing-focused layout */
.codemirror-container.markdown-editor {
    height: 60vh;
    max-height: none;
}

.codemirror-container.markdown-editor .cm-editor {
    height: 100%;
    min-height: none;
    max-height: none;
}

.codemirror-container .cm-scroller {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    line-height: 1.5;
}

.codemirror-container.markdown-editor .cm-scroller {
    line-height: 1.4;
}

.code-output {
    min-height: 100px;
    max-height: 400px;
    overflow: auto;
    padding: 1rem;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
}

.code-output:empty::before {
    content: 'Output will appear here...';
    color: var(--text-muted);
    font-style: italic;
}

.code-output pre {
    margin: 0;
    white-space: pre-wrap;
    word-break: break-word;
}

.code-output .error {
    color: #dc3545;
}

.code-output .stderr {
    color: #856404;
}

.code-output img {
    max-width: 100%;
    margin: 0.5rem 0;
}

.code-output table {
    border-collapse: collapse;
    margin: 0.5rem 0;
    font-size: 0.8rem;
}

.code-output table th,
.code-output table td {
    border: 1px solid var(--border);
    padding: 0.375rem 0.75rem;
    text-align: left;
}

.code-output table th {
    background: var(--bg-primary);
    font-weight: 600;
}

.code-output table tr:nth-child(even) {
    background: #fafafa;
}

.btn-run {
    background: #28a745;
    color: white;
    border: none;
}

.btn-run:hover {
    background: #218838;
}

.btn-run:disabled {
    background: #6c757d;
    cursor: not-allowed;
}

.pyodide-status {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pyodide-status.loading {
    color: #856404;
}

.pyodide-status.ready {
    color: #28a745;
}

.pyodide-status.error {
    color: #dc3545;
}

.spinner-small {
    width: 14px;
    height: 14px;
    border: 2px solid #ccc;
    border-top-color: #856404;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ========== Generic Card Styles (Phase 2 Template System) ========== */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
    cursor: pointer;
}

.card:hover {
    box-shadow: 0 8px 30px var(--shadow);
    transform: translateY(-2px);
}

.card.highlighted {
    animation: highlightPulse 2s ease-out;
}

.card-preview {
    width: 100%;
    height: 180px;
    overflow: hidden;
    position: relative;
}

.card-content {
    padding: 1.25rem;
}

.card-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
    line-height: 1.4;
    color: var(--text-primary);
}

.card-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.15s ease;
}

.card-title a:hover {
    color: var(--accent);
}

.card-meta {
    padding: 0 1.25rem 0.75rem 1.25rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
}

.card-meta-path {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.7rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 200px;
}

/* Author Badge */
.author-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 20px;
    height: 20px;
    opacity: 0.6;
    transition: opacity 0.2s;
    z-index: 10;
}
.author-badge:hover {
    opacity: 1;
}
.author-badge svg {
    width: 100%;
    height: 100%;
}

/* Modified Template Indicator */
.card.template-modified {
    border-color: #d4a574;
    box-shadow: 0 0 0 1px #d4a574;
}
.card.template-modified:hover {
    border-color: #c49464;
    box-shadow: 0 8px 30px var(--shadow), 0 0 0 1px #c49464;
}
.modified-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    background: #d4a574;
    color: white;
    font-size: 9px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 3px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 15;
}

/* Tag Badges */
.tag-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 3px;
    margin-top: 4px;
}
.tag-badge {
    font-size: 9px;
    font-weight: 500;
    padding: 1px 5px;
    border-radius: 2px;
    background: var(--tag-default-bg, #6b7280);
    color: var(--tag-default-text, white);
    text-transform: lowercase;
    letter-spacing: 0.3px;
}
/* Status tag colors - warm earth tones */
.tag-badge[data-tag="completed"],
.tag-badge[data-tag="done"],
.tag-badge[data-tag="complete"] {
    background: var(--tag-completed-bg, #8a9a7a);  /* sage */
}
.tag-badge[data-tag="ongoing"],
.tag-badge[data-tag="in-progress"],
.tag-badge[data-tag="active"] {
    background: var(--tag-ongoing-bg, #c4956a);  /* terracotta/ochre */
}
.tag-badge[data-tag="future"],
.tag-badge[data-tag="todo"],
.tag-badge[data-tag="planned"],
.tag-badge[data-tag="ideas"] {
    background: var(--tag-future-bg, #6a9db8);  /* warmer sky blue */
}
/* Viewer tag badges - in title bar */
.viewer-tags {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-left: 10px;
    vertical-align: middle;
}
.viewer-tags:empty {
    display: none;
}
.viewer-tags .tag-badge {
    font-size: 10px;
    padding: 2px 6px;
}

/* Template Diff Modal */
.diff-body {
    padding: 0;
}
.diff-legend {
    display: flex;
    gap: 20px;
    padding: 12px 20px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
}
.diff-legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
}
.diff-removed-sample {
    display: inline-block;
    width: 18px;
    height: 18px;
    line-height: 18px;
    text-align: center;
    background: #fdd;
    color: #a33;
    border-radius: 3px;
    font-weight: bold;
    font-family: monospace;
}
.diff-added-sample {
    display: inline-block;
    width: 18px;
    height: 18px;
    line-height: 18px;
    text-align: center;
    background: #dfd;
    color: #363;
    border-radius: 3px;
    font-weight: bold;
    font-family: monospace;
}
.diff-content {
    margin: 0;
    padding: 16px 20px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    background: #1e1e1e;
    color: #d4d4d4;
    overflow-x: auto;
    max-height: 60vh;
    overflow-y: auto;
}
.diff-header {
    color: #808080;
}
.diff-hunk {
    color: #569cd6;
    background: rgba(86, 156, 214, 0.1);
    display: block;
    margin: 8px 0 4px 0;
}
.diff-removed {
    background: rgba(244, 67, 54, 0.2);
    color: #f48771;
    display: block;
}
.diff-added {
    background: rgba(76, 175, 80, 0.2);
    color: #89d185;
    display: block;
}
.diff-context {
    color: #d4d4d4;
    display: block;
}

/* Icon-only toolbar buttons */
.btn-icon-only {
    padding: 0.4rem 0.6rem;
    color: var(--text-muted);
    background: transparent;
    border-color: transparent;
}

.btn-icon-only:hover {
    color: var(--text-primary);
    background: var(--hover-bg);
    border-color: transparent;
}

.btn-icon-only .btn-icon {
    font-size: 1.1rem;
}

/* Git Diff Mode button */
#diffModeBtn.active {
    color: var(--accent-color);
}

#diffModeBtn.active .btn-icon {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Commit Selector Dropdown */
.commit-selector-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    min-width: 400px;
    max-width: 520px;
    max-height: 400px;
    overflow: hidden;
    z-index: 1000;
}

.commit-selector-header {
    padding: 12px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-primary);
}

.commit-selector-list {
    max-height: 340px;
    overflow-y: auto;
}

.commit-selector-item {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 12px;
    padding: 10px 16px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.15s;
    align-items: baseline;
}

.commit-selector-item:last-child {
    border-bottom: none;
}

.commit-selector-item:hover {
    background: var(--hover-bg);
}

.git-commit-hash {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-color);
    background: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 4px;
}

.git-commit-subject {
    font-size: 0.85rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.git-commit-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
}

/* Card diff indicator */
.card.has-changes {
    box-shadow: 0 0 0 2px var(--accent-color);
}

.card.has-changes::before {
    content: '';
    position: absolute;
    top: 8px;
    right: 8px;
    width: 10px;
    height: 10px;
    background: var(--accent-color);
    border-radius: 50%;
    z-index: 10;
}

.card .diff-stats {
    position: absolute;
    bottom: 8px;
    right: 8px;
    font-size: 0.7rem;
    font-family: var(--font-mono);
    background: rgba(0, 0, 0, 0.7);
    padding: 2px 6px;
    border-radius: 4px;
    z-index: 10;
}

.card .diff-stats .additions {
    color: #4ade80;
}

.card .diff-stats .deletions {
    color: #f87171;
}

/* Diff mode body state - hide unchanged cards and empty containers */
body.diff-mode-active .card:not(.has-changes) {
    display: none;
}

body.diff-mode-active .card-grid:not(:has(.card.has-changes)) {
    display: none;
}

body.diff-mode-active .subdir-node:not(:has(.card.has-changes)) {
    display: none;
}

body.diff-mode-active .section:not(:has(.card.has-changes)) {
    display: none;
}

/* Toolbar position for dropdown */
.toolbar {
    position: relative;
}

/* Viewer diff mode */
.viewer-diff-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0;
}

.diff-comparing {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.diff-stats-inline {
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.diff-stats-inline .additions,
.diff-stats-inline {
    color: #4ade80;
}

.viewer-diff {
    margin: 0;
    padding: 16px;
    background: #1e1e1e;
    border-radius: 0;
    max-height: 60vh;
    overflow: auto;
}

/* Rich inline diff for markdown - unified flow */
.rich-diff-inline {
    max-height: 60vh;
    overflow: auto;
    padding: 8px 0;
}

.diff-block {
    display: flex;
    margin: 0 0 2px 0;
    border-radius: 4px;
}

.diff-block-marker {
    flex-shrink: 0;
    width: 28px;
    padding: 8px 0;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.diff-block-content {
    flex: 1;
    padding: 8px 16px;
    min-width: 0;
}

/* Unchanged blocks */
.diff-block-unchanged {
    background: transparent;
}

.diff-block-unchanged .diff-block-marker {
    visibility: hidden;
}

/* Added blocks */
.diff-block-added {
    background: rgba(74, 222, 128, 0.12);
    border-left: 3px solid #4ade80;
}

.diff-block-added .diff-block-marker {
    color: #4ade80;
}

/* Removed blocks */
.diff-block-removed {
    background: rgba(248, 113, 113, 0.12);
    border-left: 3px solid #f87171;
}

.diff-block-removed .diff-block-marker {
    color: #f87171;
}

.diff-block-removed .diff-block-content {
    opacity: 0.8;
}

/* Word-level diff view (expandable) */
.rich-diff-raw {
    margin: 16px 0 0 0;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.rich-diff-raw summary {
    padding: 8px 12px;
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--text-muted);
    background: var(--bg-primary);
}

.rich-diff-raw summary:hover {
    color: var(--text-primary);
}

.diff-inline-content {
    margin: 0;
    padding: 16px;
    background: var(--bg-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Word-level inline diff highlighting */
.diff-ins {
    background: rgba(74, 222, 128, 0.3);
    color: #22c55e;
    text-decoration: none;
    padding: 1px 2px;
    border-radius: 2px;
}

.diff-del {
    background: rgba(248, 113, 113, 0.3);
    color: #ef4444;
    text-decoration: line-through;
    padding: 1px 2px;
    border-radius: 2px;
}

/* Image diff view - side by side comparison */
.image-diff-container {
    display: flex;
    gap: 16px;
    padding: 16px;
    justify-content: center;
    align-items: flex-start;
    flex-wrap: wrap;
}

.image-diff-panel {
    flex: 1 1 300px;
    max-width: 450px;
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.image-diff-panel img {
    max-width: 100%;
    max-height: 400px;
    object-fit: contain;
    border-radius: 4px;
}

.image-diff-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-align: center;
}

.image-diff-old {
    background: rgba(248, 113, 113, 0.15);
    border: 2px solid #f87171;
}

.image-diff-old .image-diff-label {
    color: #f87171;
}

.image-diff-new {
    background: rgba(74, 222, 128, 0.15);
    border: 2px solid #4ade80;
}

.image-diff-new .image-diff-label {
    color: #4ade80;
}

/* Card Preview Layouts */
.preview-placeholder {
    font-size: 3rem;
    color: var(--text-muted);
    opacity: 0.2;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.preview-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center top;
}

/* Document preview (zoomed-out page effect) */
.preview-page {
    width: 100%;
    height: 100%;
    background: #f9f7f3;
    box-shadow: 0 0 8px rgba(0,0,0,0.1);
    overflow: hidden;
    position: relative;
    /* Note: parent .card-preview already has padding for note cards */
}

.preview-scaler {
    transform: scale(0.45);
    transform-origin: top left;
    width: 222%;
    padding: 18px 24px;
}

/* Card preview overrides - inherits from .md-content */
.preview-content {
    overflow: hidden;
}
/* Compact preview: smaller pre/table spacing */
.preview-content pre { padding: 0.75rem; margin: 0.5rem 0; }
.preview-content table { margin: 0.5rem 0; font-size: 0.85em; }
.preview-content table th,
.preview-content table td { padding: 0.25rem 0.5rem; }

.preview-page::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40px;
    background: linear-gradient(transparent, #f9f7f3);
    pointer-events: none;
}

/* Code preview - dark background */
.preview-code {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.8rem;
    color: var(--code-text);
    line-height: 1.5;
    width: 100%;
    height: 100%;
    overflow: hidden;
    white-space: pre-wrap;
    word-break: break-all;
    margin: 0;
    padding: 1.25rem;
    background: var(--code-bg);
}

.preview-code code {
    font-family: inherit;
    font-size: inherit;
    background: transparent;
    padding: 0;  /* Override hljs padding:1em */
    color: var(--code-text);
}

.preview-code::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(transparent, var(--code-bg));
    pointer-events: none;
}

/* YAML preview - light background for config files */
.preview-yaml {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.7rem;
    color: #333;
    line-height: 1.4;
    width: 100%;
    height: 100%;
    overflow: hidden;
    white-space: pre-wrap;
    word-break: break-all;
    margin: 0;
    padding: 1rem;
    background: #f8f8f8;
}

/* Split pane preview */
.preview-split {
    display: flex;
    width: 100%;
    height: 100%;
    gap: 1px;
    position: relative;
}

.preview-split-left {
    padding: 1rem;
    overflow: hidden;
    height: 100%;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    border-right: 1px solid var(--border);
}

.preview-split-right {
    padding: 0.75rem;
    overflow: hidden;
    height: 100%;
    position: relative;
    background: inherit;
}

.split-output-content {
    max-width: 100%;
    max-height: 100%;
}

.split-output-content img {
    max-height: 150px;
    max-width: 100%;
    display: block;
}

.split-code {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.4rem;
    color: var(--template-code-text, var(--code-text));
    line-height: 1.2;
    margin: 0;
    overflow: hidden;
    background: transparent;
    padding: 0.5rem;
    height: 100%;
}

.split-code code {
    font-family: inherit;
    font-size: inherit;
    background: transparent;
    color: inherit;
    padding: 0;  /* Override hljs padding:1em */
}

/* Fields preview */
.preview-fields {
    padding: 1rem;
}

.preview-field {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.8rem;
}

.preview-field-label {
    font-weight: 500;
    color: var(--text-muted);
}

} /* end @layer components (card layouts) */

@layer templates {

/* Theme template: define colors once, used by both card and viewer */
.card[data-template="theme"],
.modal.viewer[data-template="theme"] {
    --template-border: #d0c8e0;
    --template-bg: #2d2d2d;
    --template-code-bg: #2d2d2d;
    --template-code-text: #c5c8c6;
}

.card[data-template="theme"] {
    border-color: var(--template-border);
}

.card[data-template="theme"] .card-preview {
    background: var(--template-code-bg);
}

.card[data-template="theme"] .preview-code {
    background: var(--template-code-bg);
    color: var(--template-code-text);
    font-size: 0.65rem;
}

} /* end @layer templates (card templates) */

@layer components {

/* ========== Generic Viewer Styles (Phase 2 Template System) ========== */
.modal.viewer {
    max-width: 900px;
    min-height: 60vh;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    width: 90%;
    box-sizing: border-box;
}

.modal.viewer.template-modified {
    border: 2px solid #d4a574;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.4), 0 0 0 1px #d4a574;
}

.modal.viewer * {
    box-sizing: border-box;
}

.modal.viewer .modal-header {
    padding: 1.25rem 1.25rem 1rem;
    background: var(--bg-secondary);
    border-bottom: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.modal.viewer .modal-header h2 {
    font-family: 'Playfair Display', serif;
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}
.modal.viewer .modal-header .modal-close {
    margin-left: auto;
}

.viewer-content {
    padding: 1.25rem;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    position: relative;
}

/* Remove padding when content has full-width layouts */
.viewer-content:has(.viewer-split-pane),
.viewer-content:has(.viewer-code-only) {
    padding: 0;
    overflow: hidden;
}

.viewer-backlinks {
    padding: 0 1.25rem;
}

.viewer-footer {
    padding: 1rem 1.25rem;
    background: var(--bg-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border);
}

.viewer-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.viewer-actions {
    display: flex;
    gap: 0.5rem;
    position: relative;  /* For git history dropdown positioning */
}

/* Viewer content layouts - inherits from .md-content */
.viewer-markdown pre { padding: 1rem; max-width: 100%; }

.viewer-text {
    margin: 0;
    white-space: pre-wrap;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

.viewer-yaml {
    margin: 0;
    padding: 1.5rem;
    white-space: pre-wrap;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    background: #f8f8f8;
    border-radius: 4px;
}

.viewer-empty {
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
}

.viewer-loading {
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
}

.viewer-error {
    padding: 2rem;
}

/* Image viewer layout */
.viewer-image-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.viewer-thumbnail {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--border) 100%);
    border-radius: 8px;
}

.viewer-thumbnail img {
    max-width: 80%;
    max-height: 300px;
    object-fit: contain;
    border-radius: 4px;
}

.viewer-thumbnail .placeholder {
    font-size: 4rem;
    color: var(--text-muted);
    opacity: 0.3;
}

.viewer-image-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem;
    background: var(--bg-primary);
    border-radius: 6px;
    border: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.viewer-image-path {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.75rem;
    background: transparent;
    color: var(--text-secondary);
}

.viewer-image-size {
    white-space: nowrap;
}

.viewer-url {
    font-size: 0.8rem;
    color: var(--text-muted);
    padding: 0.5rem 0.75rem;
    background: var(--bg-primary);
    border-radius: 6px;
    border: 1px solid var(--border);
    word-break: break-all;
}

.viewer-url a {
    color: var(--accent);
    text-decoration: none;
}

.viewer-url a:hover {
    text-decoration: underline;
}

/* Bookmark description - inherits from .md-content with compact variant styling */
.viewer-description {
    padding: 0.5rem 0.75rem;
    background: var(--bg-primary);
    border-radius: 6px;
    border: 1px solid var(--border);
}
/* Tighter spacing for descriptions */
.viewer-description p { margin: 0 0 0.75rem 0; }
.viewer-description p:last-child { margin-bottom: 0; }
.viewer-description ul, .viewer-description ol { margin: 0.75rem 0; padding-left: 1.75rem; }
.viewer-description li:last-child { margin-bottom: 0; }
/* Different backgrounds for description context */
.viewer-description code { background: var(--bg-secondary); }
.viewer-description blockquote { margin: 0.75rem 0; color: var(--text-muted); }
.viewer-description table { margin: 0.75rem 0; }
.viewer-description table th { background: var(--bg-secondary); }
.viewer-description table tr:nth-child(even) { background: var(--bg-secondary); }

/* Split pane viewer layout */
.viewer-split-pane {
    display: flex;
    min-height: 300px;
    height: 100%;
    width: 100%;
}

.viewer-split-left {
    flex: 0 0 60%;
    padding: 2rem;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    border-right: 1px solid var(--border);
}

.viewer-split-right {
    flex: 1;
    padding: 1.5rem;
    overflow: auto;
    max-height: calc(90vh - 120px);
    background: var(--code-bg);
}

.viewer-split-right pre {
    margin: 0;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.75rem;
    line-height: 1.4;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--code-text);
}

.viewer-split-right code {
    background: transparent;
    color: var(--code-text);
    font-family: inherit;
    padding: 0;  /* Override hljs padding:1em */
}

.viewer-output-content {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.viewer-output-content img {
    max-width: 100%;
    max-height: 300px;
    display: block;
    border-radius: 4px;
}

/* Code-only viewer - dark background */
.viewer-code-only {
    padding: 2rem;
    background: var(--code-bg);
}

.viewer-code-only pre {
    margin: 0;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--code-text);
}

.viewer-code-only code {
    background: transparent;
    color: var(--code-text);
    padding: 0;  /* Override hljs padding:1em */
}

/* Sections viewer layout */
.viewer-section {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.viewer-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.viewer-section-title {
    font-family: 'Playfair Display', serif;
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 0.75rem 0;
    color: var(--text-primary);
}

.viewer-section-content {
    line-height: 1.6;
    color: var(--text-secondary);
}

} /* end @layer components (viewer layouts) */

@layer templates {

/* Theme viewer styles */
.modal.viewer[data-template="theme"] {
    background: var(--template-bg);
    border: 1px solid var(--template-border);
}

.modal.viewer[data-template="theme"] .viewer-content {
    background: var(--template-code-bg);
    color: var(--template-code-text);
}

.modal.viewer[data-template="theme"] .viewer-content pre {
    color: var(--template-code-text);
}

/* Note, code, bookmark, quiz, quiz-response, quiz-response-summary
   viewer styles are now in card-types/{module}/styles.css */

} /* end @layer templates (viewer templates) */


@layer components {

/* Override highlight.js in generic viewer
   hljs is in @layer vendors, these are in @layer components (higher precedence) */
.viewer-split-right .hljs,
.viewer-code-only .hljs {
    background: transparent;
    color: var(--code-text);
}

/* Internal Links */
.internal-link {
    color: var(--link-color);
    text-decoration: none;
    border-bottom: 1px dashed var(--link-color);
    cursor: pointer;
    transition: all 0.2s;
}

.internal-link:hover {
    color: var(--link-hover);
    border-bottom-style: solid;
}

.internal-link.broken {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* Backlinks */
.backlinks {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.backlinks-title {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.backlinks-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.backlink-item {
    font-size: 0.8rem;
    padding: 0.25rem 0.5rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.2s;
}

.backlink-item:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(26, 26, 26, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    backdrop-filter: blur(4px);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
    overflow: hidden;
}

.modal {
    background: var(--bg-secondary);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-large {
    max-width: 900px;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    font-family: 'Playfair Display', serif;
    font-weight: 400;
    font-size: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.field-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: 'Source Sans 3', sans-serif;
    font-size: 1rem;
    border: 1px solid var(--border);
    background: var(--bg-primary);
    transition: all 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--bg-secondary);
}

/* Editor modal: hide header, float close button */
#editorModal .modal {
    position: relative;
}

#editorModal .modal-header {
    position: absolute;
    top: 0;
    right: 0;
    border-bottom: none;
    padding: 0.5rem;
    z-index: 1;
}

#editorModal .modal-header h2 {
    display: none;
}

#editorModal .modal-body {
    padding-top: 1.1rem;
}

/* Location path in editor footer */
.editor-location {
    font-family: 'Source Code Pro', monospace;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.form-group input.location-readonly {
    background: var(--bg-tertiary, #f0f0f0);
    color: var(--text-muted);
    cursor: not-allowed;
    font-family: 'Source Code Pro', monospace;
    font-size: 0.9rem;
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.form-group textarea.markdown-editor {
    min-height: 300px;
    font-family: 'Source Sans 3', sans-serif;
    line-height: 1.6;
}

/* Collapsible details section in editor */
.editor-details {
    margin-top: 0.5rem;
    margin-bottom: 1.25rem;
    border: 1px solid var(--border);
    border-radius: 4px;
}

.editor-details summary {
    cursor: pointer;
    padding: 0.5rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-muted);
    user-select: none;
}

.editor-details summary:hover {
    color: var(--text-secondary);
}

.editor-details-body {
    padding: 0 0.75rem 0.5rem;
}

.editor-details-body .form-group {
    margin-bottom: 0.75rem;
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* GitHub connect modal */
.github-connect-body .field-help {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}

.github-connect-body .field-help a {
    color: var(--accent);
}

.github-connect-message {
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.github-connect-error {
    background: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fecaca;
}

#githubConnectBtn:disabled {
    opacity: 0.6;
    cursor: wait;
}

/* Notebook Chooser */
.notebook-chooser-list {
    margin-bottom: 16px;
}

.notebook-chooser-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    margin-bottom: 6px;
}

.notebook-chooser-item:hover {
    background: var(--bg-hover, rgba(0,0,0,0.04));
    border-color: var(--accent);
}

.notebook-chooser-item .chooser-icon {
    font-size: 1.4rem;
    flex-shrink: 0;
    width: 28px;
    text-align: center;
}

.notebook-chooser-item .chooser-label {
    font-size: 1rem;
    color: var(--text-primary);
}

.notebook-chooser-item .chooser-sublabel {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.notebook-chooser-actions {
    border-top: 1px solid var(--border);
    padding-top: 16px;
}

/* List editor styles */
.list-editor {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.list-editor-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.list-editor-input {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.9rem;
}

.list-editor-input:focus {
    outline: none;
    border-color: var(--accent);
}

.list-editor-input[readonly] {
    background: var(--bg-secondary);
    cursor: default;
}

.list-editor-buttons {
    display: flex;
    gap: 0.25rem;
}

.list-editor-btn {
    width: 28px;
    height: 28px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg-secondary);
    cursor: pointer;
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: all 0.15s;
}

.list-editor-btn:hover {
    background: var(--bg-primary);
    border-color: var(--accent);
    color: var(--text-primary);
}

.list-editor-btn-delete:hover {
    background: #fee;
    border-color: #c00;
    color: #c00;
}

.list-editor-add {
    align-self: flex-start;
    margin-top: 0.5rem;
    padding: 0.4rem 0.8rem;
    border: 1px dashed var(--border);
    border-radius: 4px;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.15s;
}

.list-editor-add:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--bg-secondary);
}

/* Records editor - datatable styles */
.records-editor {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
    background: white;
}

.records-editor th {
    padding: 0.4rem 0.5rem;
    text-align: left;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-muted);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.records-editor th:first-child,
.records-editor td:first-child {
    width: 32px;
    text-align: center;
}

.records-editor th:last-child {
    width: auto;
}

.records-editor-row {
    transition: background 0.15s, opacity 0.15s;
}

.records-editor-row:not(:last-child) td {
    border-bottom: 1px solid var(--bg-secondary);
}

.records-editor-row:hover {
    background: var(--bg-primary);
}

.records-editor-row.is-hidden {
    color: var(--text-muted);
}
.records-editor-row.is-hidden .records-editor-input {
    color: var(--text-muted);
}

.records-editor-row.dragging {
    opacity: 0.4;
    background: var(--bg-secondary);
}

.records-editor-row.drag-over {
    box-shadow: inset 0 -2px 0 var(--accent);
}

.records-editor td {
    padding: 0.25rem 0.5rem;
    vertical-align: middle;
}

.records-editor-input {
    width: 100%;
    padding: 0.3rem 0.4rem;
    border: 1px solid transparent;
    border-radius: 3px;
    font-size: 0.9rem;
    background: transparent;
    transition: all 0.15s;
}

.records-editor-input:hover {
    background: white;
    border-color: var(--border);
}

.records-editor-input:focus {
    outline: none;
    background: white;
    border-color: var(--accent);
}

.records-editor-input::placeholder {
    color: var(--text-muted);
    font-style: italic;
}

.records-editor-input[readonly] {
    color: var(--text-muted);
    cursor: default;
}

.records-editor-input.is-frozen {
    background: var(--bg-secondary);
    cursor: default;
    pointer-events: none;
}

/* System section row: no hover effect */
.records-editor-row.is-system-section:hover {
    background: transparent;
}

.records-editor-toggle {
    width: 22px;
    height: 22px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 3px;
    background: white;
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--accent);
    transition: all 0.15s;
}

.records-editor-toggle:hover {
    border-color: var(--accent);
    background: var(--bg-primary);
}

.records-editor-toggle.is-checked {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.records-editor-drag-handle {
    cursor: grab;
    color: var(--text-muted);
    padding: 0.25rem;
    user-select: none;
    font-size: 1rem;
}

.records-editor-drag-handle:hover {
    color: var(--text-primary);
}

.records-editor-drag-handle:active {
    cursor: grabbing;
}

.records-editor-add {
    margin-top: 0.5rem;
    padding: 0.4rem 0.8rem;
    border: 1px dashed var(--border);
    border-radius: 4px;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.15s;
}

.records-editor-add:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--bg-secondary);
}

/* Template selector (card type checkboxes) */
.templates-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-secondary);
}

.template-selector-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg-primary);
    cursor: pointer;
    transition: all 0.15s;
    user-select: none;
}

.template-selector-item:hover:not(.in-use) {
    border-color: var(--accent);
}

.template-selector-item.in-use {
    background: var(--bg-tertiary, var(--bg-secondary));
    cursor: not-allowed;
    opacity: 0.7;
}

.template-selector-item input[type="checkbox"] {
    cursor: pointer;
    width: 16px;
    height: 16px;
}

.template-selector-item.in-use input[type="checkbox"] {
    cursor: not-allowed;
}

.template-selector-label {
    font-size: 0.9rem;
    color: var(--text-primary);
}

.template-selector-badge {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-style: italic;
    margin-left: 0.25rem;
}

.thumbnail-upload {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--border) 100%);
    border: 2px dashed var(--border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s;
}

.thumbnail-upload:hover {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--border) 100%);
}

.thumbnail-upload.drag-over {
    border-color: var(--accent);
    border-style: solid;
    background: var(--bg-secondary);
    transform: scale(1.02);
}

.thumbnail-upload img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center top;
}

.thumbnail-placeholder {
    text-align: center;
    pointer-events: none;
}

.thumbnail-icon {
    font-size: 3rem;
    opacity: 0.3;
    display: block;
    margin-bottom: 0.5rem;
}

.thumbnail-hint {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

.thumbnail-upload.has-image .thumbnail-placeholder {
    display: none;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Generic editor modal footer layout */
#editorModal .modal-footer {
    justify-content: space-between;
}
.editor-actions-left {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}
.editor-actions-right {
    display: flex;
    gap: 0.75rem;
}
.editor-status {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Constrain thumbnail preview in generic editor */
#editorModal .thumbnail-upload {
    max-width: 400px;
}

/* Field width variants for generic editor */
.form-field-half {
    display: inline-block;
    width: calc(50% - 0.5rem);
    vertical-align: top;
}
.form-field-half:nth-child(odd) {
    margin-right: 0.5rem;
}

.loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--bg-accent);
    color: var(--bg-primary);
    padding: 1rem 1.5rem;
    font-size: 0.875rem;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1001;
}

.toast.active {
    transform: translateY(0);
    opacity: 1;
}

/* Loading overlay for remote notebook loading */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
    z-index: 9999;
}

.loading-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.loading-overlay .loading-content {
    background: var(--card-bg, white);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.loading-overlay .loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    margin: 0 auto 1rem;
}

.loading-overlay .loading-message {
    color: var(--text-primary);
    font-size: 0.9rem;
}

/* Remote notebook banner */
.remote-banner {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1rem;
    background: var(--info-bg, #e7f3ff);
    border-bottom: 1px solid var(--info-border, #b3d7ff);
    font-size: 0.85rem;
}

.remote-banner .remote-icon {
    font-size: 1rem;
}

.remote-banner .remote-label {
    font-weight: 500;
    color: var(--text-primary);
    flex-shrink: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.remote-banner .remote-hint {
    color: var(--text-secondary);
    margin-left: auto;
    flex-shrink: 0;
}

.remote-banner .btn {
    flex-shrink: 0;
}

@media (max-width: 768px) {
    header {
        padding: 1.5rem 1rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    .toolbar {
        padding: 1rem;
    }

    main {
        padding: 1rem;
    }

    .items-grid {
        grid-template-columns: 1fr;
    }
}

} /* end @layer components */

/* Print styles - intentionally unlayered (uses !important to override everything) */
@media print {
    /* Hide everything except the viewer modal */
    body > *:not(.modal-overlay) {
        display: none !important;
    }

    /* Reset modal overlay to static positioning for print flow */
    .modal-overlay {
        position: static !important;
        background: none !important;
        display: block !important;
        opacity: 1 !important;
        visibility: visible !important;
        overflow: visible !important;
    }

    .modal-overlay:not(.active) {
        display: none !important;
    }

    /* Reset modal to static, full-width, auto-height for proper pagination */
    .modal.viewer {
        position: static !important;
        transform: none !important;
        width: 100% !important;
        max-width: none !important;
        max-height: none !important;
        min-height: auto !important;
        height: auto !important;
        overflow: visible !important;
        box-shadow: none !important;
        display: block !important;
    }

    .viewer-content {
        overflow: visible !important;
        height: auto !important;
        max-height: none !important;
    }

    /* Ensure text wraps properly within page margins */
    .viewer-markdown,
    .viewer-text,
    .viewer-content {
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        max-width: 100% !important;
    }

    /* Pre/code blocks: preserve formatting (no wrapping for ASCII diagrams) */
    .viewer-markdown pre,
    .viewer-content pre,
    pre {
        white-space: pre !important;
        overflow-x: visible !important;
    }

    /* Tables should not overflow page */
    .viewer-markdown table,
    .viewer-content table {
        max-width: 100% !important;
        table-layout: fixed !important;
    }

    .viewer-markdown td,
    .viewer-markdown th,
    .viewer-content td,
    .viewer-content th {
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
    }

    /* Hide UI elements not needed in print */
    .modal-close,
    .viewer-footer,
    .viewer-backlinks,
    .author-badge {
        display: none !important;
    }

    /* Remove modal frame/border and backgrounds for clean print.
       These are unlayered so they beat @layer theme (theme.css) automatically. */
    .modal.viewer {
        border: none !important;
        border-radius: 0 !important;
        background: white;
    }

    .modal-header {
        border-bottom: none !important;
        background: white;
    }

    .viewer-content {
        background: white;
    }

    /* Ensure content flows across pages */
    .viewer-content,
    .viewer-content * {
        break-inside: auto;
    }

    /* Avoid breaking inside these elements */
    pre, code, img, .katex-display {
        break-inside: avoid;
    }

    /* Tables need extra specificity and display reset for break-inside to work */
    table, .viewer-content table, .markdown-content table {
        break-inside: avoid !important;
        page-break-inside: avoid !important;  /* Legacy property for older browsers */
        display: table !important;  /* Ensure table display mode */
    }

    thead {
        display: table-header-group;  /* Repeat headers on each page if table does break */
    }

    tr {
        break-inside: avoid;
        page-break-inside: avoid;
    }

    /* Remove parchment/colored backgrounds for cleaner PDF */
    html, body,
    .modal-overlay,
    .modal.viewer,
    .modal.viewer[data-template="note"],
    .modal.viewer[data-template="code"],
    .modal.viewer[data-template="bookmark"],
    .viewer-content,
    .markdown-content {
        background: white !important;
    }

    /* Page setup: reduced margins for wider content area */
    @page {
        margin: 0.5in;
    }

    /* Slightly smaller font for print to fit more content */
    .viewer-markdown,
    .viewer-content {
        font-size: 0.85rem !important;
    }

    .viewer-markdown pre,
    .viewer-content pre,
    pre {
        font-size: 0.75rem !important;
    }

    /* Ensure backgrounds print (for code blocks) */
    * {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
}