@import url('https://fonts.googleapis.com/css2?family=Anton&family=Archivo+Black&family=Chivo:ital,wght@0,400;0,700;1,400&family=IBM+Plex+Mono:ital,wght@0,400;0,600;1,400&display=swap');
    /* === Design Tokens === */
    :root {
      --font-editor: 'IBM Plex Mono', monospace;
      --font-ui: 'Archivo Black', system-ui, sans-serif;
      --font-preview: 'Chivo', sans-serif;
      --font-display: 'Anton', sans-serif;

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

      --shadow-sm: 4px 4px 0px rgba(0,0,0,0.05);
      --shadow-md: 8px 8px 0px rgba(0,0,0,0.08);

      --spacing-xs: 4px;
      --spacing-sm: 8px;
      --spacing-md: 16px;
      --spacing-lg: 32px;
      --spacing-xl: 48px;

      --safe-area-inset-top: env(safe-area-inset-top, 0px);
      --safe-area-inset-right: env(safe-area-inset-right, 0px);
      --safe-area-inset-bottom: env(safe-area-inset-bottom, 0px);
      --safe-area-inset-left: env(safe-area-inset-left, 0px);

      --color-bg: #fdfbf7;
      --color-surface: #fffdf7;
      --color-border: #d4cbb3;
      --color-border-subtle: #eae3cd;

      --color-text: #2d2a26;
      --color-muted: #8c8273;
      --color-accent: #ff7eb3;
      --color-accent-subtle: rgba(255, 107, 107, 0.15);

      --color-editor-bg: #fcf9f2;
      --color-editor-text: #3d3935;
      --color-editor-muted: #a39b8e;
      --color-editor-line: #e3dec9;
      --color-editor-cursor: #ff6b6b;
    }

    /* === Reset & Base === */
    *, *::before, *::after {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    ::selection {
      background: var(--color-accent);
      color: var(--color-bg);
    }

    html, body {
      height: 100%;
      overflow-x: hidden;
    }

    body {
      -webkit-touch-callout: none;
      -webkit-user-select: none;
      user-select: none;
      font-family: var(--font-preview);
      background: var(--color-bg);
      color: var(--color-text);
      font-size: var(--font-size-preview, 16px);
      line-height: var(--line-height-preview, 1.6);
      letter-spacing: var(--letter-spacing-preview, normal);
      -webkit-font-smoothing: antialiased;
    }


    /* --- Web Components --- */
    md-button {
      display: inline-flex;
      cursor: pointer;
      user-select: none;
    }
    md-modal {
      display: flex;
      flex-direction: column;
    }
    md-bottom-sheet {
      display: flex;
      flex-direction: column;
    }

    /* === App Shell === */
    .app-shell {
      display: flex;
      flex-direction: column;
      height: 100vh;
      position: relative;
      background-color: var(--color-bg);
      overflow-x: hidden;
      background-image:
        linear-gradient(rgba(68, 68, 68, 0.3) 1px, transparent 1px),
        linear-gradient(90deg, rgba(68, 68, 68, 0.3) 1px, transparent 1px);
      background-size: 40px 40px;
    }

    .app-shell::after {
      content: '';
      position: absolute;
      inset: 0;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.06'/%3E%3C/svg%3E");
      pointer-events: none;
      z-index: 10;
    }

    .glass-panel {
      background: rgba(30, 28, 27, 0.7);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }

    .app-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: calc(var(--spacing-md) + var(--safe-area-inset-top)) calc(var(--spacing-lg) + var(--safe-area-inset-right)) var(--spacing-md) calc(var(--spacing-lg) + var(--safe-area-inset-left));
      border-bottom: 1px solid var(--color-border);
      /* background: var(--color-surface); removed for glass-panel */
      flex-shrink: 0;
      height: 56px;
      box-shadow: var(--shadow-sm);
      z-index: 20;
    }

    .app-logo {
      display: flex;
      align-items: center;
      gap: var(--spacing-sm);
      font-family: var(--font-display);
      font-size: 1.8rem;
      font-weight: 600;
      color: var(--color-text);
      letter-spacing: -0.02em;
      user-select: none;
      text-transform: uppercase;
    }

    .app-logo img {
      width: 24px;
      height: 24px;
    }

    .app-logo span {
      color: var(--color-accent);
    }

    .app-meta {
      font-family: var(--font-editor);
      font-size: 12px;
      color: var(--color-muted);
      display: flex;
      gap: var(--spacing-md);
      align-items: center;
    }

    .word-count {
      opacity: 0.7;
    }


    .btn-action.desktop-only, .btn-action.mobile-only {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 6px;
      gap: 4px;
    }
    .btn-action i {
      width: 16px;
      height: 16px;
    }

    .btn-action {
      font-family: var(--font-ui); /* changed to match ui font */
      font-weight: 500;
      font-size: 12px;
      color: var(--color-accent);
      background: var(--color-accent-subtle);
      border: 2px solid var(--color-accent);
      border-radius: var(--radius-sm);
      padding: var(--spacing-xs) var(--spacing-sm);
      cursor: pointer;
      transition: all 0.15s ease;
      text-decoration: none;
      line-height: 1;

      text-transform: uppercase;
      box-shadow: 2px 2px 0px var(--color-accent);
    }

    .btn-action:hover {
      background: var(--color-accent);
      color: var(--color-bg);
      box-shadow: 6px 6px 0px var(--color-accent);
      transform: translate(-4px, -4px);
    }

    .btn-action:active {
      box-shadow: 0px 0px 0px var(--color-accent);
      transform: translate(2px, 2px);
    }

    .btn-action:focus-visible {
      outline: 2px solid var(--color-accent);
      outline-offset: 2px;
    }


    .btn-primary {
      background: var(--color-accent);
      color: #fff;
      border: 1px solid var(--color-accent);
    }
    .btn-primary:hover {
      background: var(--color-accent);
      opacity: 0.9;
    }
    .btn-icon {
      padding: var(--spacing-xs);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      width: 32px;
      height: 32px;
    }
    .btn-icon i {
      width: 16px;
      height: 16px;
    }

    .btn-action.is-loading {
      opacity: 0.5;
      pointer-events: none;
    }


    .collab-status {
      font-size: 0.8em;
      color: var(--color-muted);
      margin-top: var(--spacing-sm);
    }
.share-result {
      font-family: var(--font-editor);
      font-size: 12px;
    }

    .share-result a {
      color: var(--color-accent);
      text-decoration: underline;
      text-underline-offset: 2px;
    }


    .btn-action[data-action="collab"] {
      background: transparent;
      color: var(--color-text);
      border-radius: var(--radius-lg);
      padding: 8px 16px;
      box-shadow: var(--shadow-sm);
    }
    .btn-action[data-action="share"] {
      background: transparent;
      border: 1px solid var(--color-border);
      color: var(--color-text);
      border-radius: var(--radius-lg);
      padding: 8px 16px;
    }
    .btn-action[data-action="share"]:hover {
      background: var(--color-surface);
      color: var(--color-text);
      box-shadow: var(--shadow-md);
    }

    /* === Main Panels === */
    .app-main {
      display: grid;
      background: var(--color-surface);
      border-top: 1px solid var(--color-border);
      padding: 0;
      gap: 0;
      border-radius: 0;
      box-shadow: none;
      /* default to 1fr 1fr but allow overriding via var(--editor-w) and var(--splitter-w) */
      grid-template-columns: var(--editor-w, 1fr) var(--splitter-w, 4px) var(--preview-w, 1fr);
      flex: 1;
      min-height: 0;
      padding: var(--spacing-md);
      gap: var(--spacing-md);
      background: var(--color-bg);
      z-index: 20;
    }

    /* ── Splitter ── */
    .splitter {
      background: transparent;
      flex-shrink: 0;
      position: relative;
      z-index: 5;
      transition: background 0.15s;
    }
    .splitter:hover, .splitter.active {
      background: var(--color-border);
    }
    .splitter-v {
      width: 4px;
      cursor: col-resize;
      /* center in the gap by default */
      margin: 0 calc(var(--spacing-md) / -2 + 2px);
    }

    @keyframes lustre-reveal {
      from { opacity: 0; transform: translateY(24px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .panel {
      display: flex;
      flex-direction: column;
      min-height: 0;
      min-width: 0;
      background: var(--color-surface);
      border-radius: 2px 255px 3px 25px / 255px 5px 225px 3px;
      border: 3px solid var(--color-border);
      box-shadow: 8px 8px 0px var(--color-border);
      overflow: hidden;
      opacity: 0;
      animation: lustre-reveal 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    }

    .panel-editor {
      animation-delay: 0.05s;
    }

    .panel-preview {
      animation-delay: 0.12s;
    }

    .panel-label {
      font-family: var(--font-editor);
      font-size: 11px;
      font-weight: 400;
      color: var(--color-muted);
      letter-spacing: 0.08em;
      text-transform: uppercase;
      padding: var(--spacing-sm) var(--spacing-lg);
      border-bottom: 1px solid var(--color-border);
      flex-shrink: 0;
      user-select: none;
    }

    /* === Editor Panel === */
    .panel-editor {
      background: var(--color-editor-bg);
      border: none;
      box-shadow: none;
    }

    .panel-editor .panel-label {
      background: var(--color-editor-bg);
      color: var(--color-editor-muted);
      border-color: var(--color-editor-line);
    }

    .editor-textarea, .preview-content {
      min-height: 0;
      -webkit-user-select: text;
      user-select: text;
    }

    .editor-textarea {
      flex: 1;
      width: 100%;
      resize: none;
      border: none;
      outline: none;
      background: var(--color-editor-bg);
      color: var(--color-editor-text);
      font-family: var(--font-editor);
      font-size: var(--font-size-editor, 15px);
      line-height: var(--line-height-editor, 1.6);
      letter-spacing: var(--letter-spacing-editor, normal);
      padding: var(--spacing-lg);
      caret-color: var(--color-editor-cursor);
      tab-size: 2;
    }

    .editor-textarea::placeholder {
      color: var(--color-editor-muted);
      opacity: 0.6;
    }


    /* === Preview Panel === */
    .panel-preview {
      background: var(--color-bg);
      border-left: 1px solid var(--color-border);
      border: none;
      box-shadow: none;
    }

    .preview-content {
      flex: 1;
      min-width: 0;
      overflow-y: auto;
      padding: var(--spacing-lg);
      scroll-behavior: smooth;
    }

    .preview-empty {
      display: flex;
      align-items: center;
      justify-content: center;
      height: 100%;
      color: var(--color-muted);
      font-style: italic;
      font-size: 15px;
      opacity: 0.5;
    }

    .parse-error {
      font-family: var(--font-editor);
      font-size: 13px;
      color: #b91c1c;
      background: #fef2f2;
      border: 1px solid #fecaca;
      border-radius: var(--radius-md);
      padding: var(--spacing-md);
      line-height: 1.6;
    }

    .parse-error strong {
      display: block;
      margin-bottom: var(--spacing-xs);
    }

    /* === Markdown Preview Styles === */
    .preview-content h1 {
      font-family: var(--font-display);
      font-size: 3em;
      font-weight: 600;
      line-height: 1.1;
      margin-bottom: var(--spacing-md);
      color: var(--color-text);
      letter-spacing: -0.02em;
    }

    .preview-content h2 {
      font-family: var(--font-display);
      font-size: 2.2em;
      font-weight: 500;
      line-height: 1.2;
      margin-top: var(--spacing-lg);
      margin-bottom: var(--spacing-sm);
      color: var(--color-text);
      letter-spacing: -0.01em;
    }

    .preview-content h3 {
      font-family: var(--font-display);
      font-size: 1.6em;
      font-weight: 500;
      line-height: 1.3;
      margin-top: var(--spacing-lg);
      margin-bottom: var(--spacing-sm);
      color: var(--color-text);
      text-transform: uppercase;
    }

    .preview-content h4, .preview-content h5, .preview-content h6 {
      font-family: var(--font-editor);
      font-size: 0.85em;
      font-weight: 500;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      margin-top: var(--spacing-lg);
      margin-bottom: var(--spacing-sm);
      color: var(--color-muted);
    }

    .preview-content p {
      margin-bottom: var(--spacing-md);
      line-height: 1.75;
    }

    .preview-content strong {
      font-weight: 600;
    }

    .preview-content em {
      font-style: italic;
    }

    .preview-content a {
      color: var(--color-accent);
      text-decoration: underline;
      text-underline-offset: 3px;
      text-decoration-thickness: 1px;
    }

    .preview-content a:hover {
      text-decoration-thickness: 2px;
    }

    .preview-content blockquote {
      border-left: 3px solid var(--color-accent);
      padding: var(--spacing-sm) var(--spacing-md);
      margin: var(--spacing-md) 0;
      background: var(--color-accent-subtle);
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      color: var(--color-text);
      font-style: italic;
    }

    .preview-content blockquote p:last-child {
      margin-bottom: 0;
    }

    .preview-content code {
      font-family: var(--font-editor);
      font-size: 0.88em;
      background: var(--color-bg);
      border: 1px solid var(--color-border);
      padding: 2px 6px;
      border-radius: var(--radius-sm);
    }

    .preview-content pre {
      background: var(--color-editor-bg);
      color: var(--color-editor-text);
      padding: var(--spacing-md);
      border-radius: var(--radius-md);
      margin: var(--spacing-md) 0;
      overflow-x: auto;
      max-width: 100%;
      line-height: 1.6;
    }

    .preview-content pre code {
      background: none;
      border: none;
      padding: 0;
      font-size: 13px;
      color: inherit;
      white-space: pre;
    }

    .preview-content pre code.hljs {
      background: transparent;
      padding: 0;
    }

    .preview-content ul, .preview-content ol {
      margin: var(--spacing-md) 0;
      padding-left: var(--spacing-lg);
    }

    .preview-content li {
      margin-bottom: var(--spacing-xs);
      line-height: 1.7;
    }

    .preview-content li::marker {
      color: var(--color-muted);
    }

    .preview-content hr {
      border: none;
      border-top: 1px solid var(--color-border);
      margin: var(--spacing-lg) 0;
    }

    .preview-content img {
      max-width: 100%;
      border-radius: var(--radius-md);
      margin: var(--spacing-md) 0;
    }

    .preview-content table {
      width: 100%;
      border-collapse: collapse;
      margin: var(--spacing-md) 0;
      font-size: 0.92em;
    }

    .preview-content th {
      font-family: var(--font-editor);
      font-size: 0.8em;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--color-muted);
      text-align: left;
      padding: var(--spacing-sm) var(--spacing-md);
      border-bottom: 2px solid var(--color-border);
    }

    .preview-content td {
      padding: var(--spacing-sm) var(--spacing-md);
      border-bottom: 1px solid var(--color-border-subtle);
    }

    .preview-content input[type="checkbox"] {
      accent-color: var(--color-accent);
      margin-right: var(--spacing-sm);
    }

    .preview-content:focus-visible {
      outline: 2px solid var(--color-accent);
      outline-offset: -2px;
    }

    /* === Scrollbar === */
    .preview-content::-webkit-scrollbar {
      width: 6px;
    }

    .preview-content::-webkit-scrollbar-track {
      background: transparent;
    }

    .preview-content::-webkit-scrollbar-thumb {
      background: var(--color-border);
      border-radius: 3px;
    }

    .editor-textarea::-webkit-scrollbar {
      width: 6px;
    }

    .editor-textarea::-webkit-scrollbar-track {
      background: transparent;
    }

    .editor-textarea::-webkit-scrollbar-thumb {
      background: var(--color-editor-line);
      border-radius: 3px;
    }


    /* === Mobile Toolbar === */
    .mobile-toolbar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: var(--color-surface);
      border-top: 1px solid var(--color-border);
      display: flex;
      justify-content: space-around;
      align-items: center;
      padding: var(--spacing-sm) var(--safe-area-inset-right) calc(var(--spacing-sm) + var(--safe-area-inset-bottom)) var(--safe-area-inset-left);
      box-shadow: 0 -6px 0px var(--color-border);
      z-index: 50;
    }

    .mobile-toolbar-btn {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 4px;
      background: transparent;
      border: none;
      color: var(--color-muted);
      font-size: 10px;
      padding: var(--spacing-xs) var(--spacing-sm);
    }
    .mobile-toolbar-btn i {
      width: 20px;
      height: 20px;
      stroke-width: 2;
    }

    .mobile-toolbar-btn:hover, .mobile-toolbar-btn:active, .mobile-toolbar-btn.is-active {
      color: var(--color-accent);
      background: transparent;
    }

    /* Padding for app-main so it doesn't get hidden under the toolbar */
    @media (max-width: 768px) {
      .app-shell {
        padding-bottom: calc(60px + var(--safe-area-inset-bottom)); /* Height of the toolbar roughly */
      }
      .app-header .mobile-only {
        display: none !important; /* Hide old mobile header buttons */
      }
      .mobile-toolbar.mobile-only {
          display: flex;
      }
    }

    /* === Responsive === */
    .mobile-only {
      display: none;
    }

    /* === Bottom Sheet === */
    .bottom-sheet-overlay {
      position: fixed;
      top: 0; left: 0; right: 0; bottom: 0;
      background: rgba(0,0,0,0.3);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      display: flex;
      align-items: flex-end;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.2s ease;
      z-index: 200;
    }

    .bottom-sheet-overlay.is-active {
      opacity: 1;
      pointer-events: auto;
    }

    .bottom-sheet {
      background: var(--color-surface);
      border-top-left-radius: var(--radius-lg);
      border-top-right-radius: var(--radius-lg);
      width: 100%;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-md);
      transform: translateY(100%);
      transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      padding-bottom: var(--safe-area-inset-bottom);
}

    .bottom-sheet-overlay.is-active .bottom-sheet {
      transform: translateY(0);
    }


    .bottom-sheet-handle {
      width: 40px;
      height: 4px;
      background: var(--color-border);
      border-radius: 4px;
      margin: 8px auto 0;
    }

    .bottom-sheet-header {
      padding: var(--spacing-md) calc(var(--spacing-lg) + var(--safe-area-inset-right)) var(--spacing-md) calc(var(--spacing-lg) + var(--safe-area-inset-left));
      border-bottom: 1px solid var(--color-border);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: var(--spacing-sm);
      font-family: var(--font-editor);
      font-weight: 500;
    }





    .bottom-sheet-body {
      padding: var(--spacing-md) calc(var(--spacing-lg) + var(--safe-area-inset-right)) var(--spacing-md) calc(var(--spacing-lg) + var(--safe-area-inset-left));
    }

    .bottom-sheet-footer {
      padding: var(--spacing-md) calc(var(--spacing-lg) + var(--safe-area-inset-right)) var(--spacing-md) calc(var(--spacing-lg) + var(--safe-area-inset-left));
      border-top: 1px solid var(--color-border);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: var(--spacing-sm);
    }

    .bottom-sheet-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding: 8px 0;
    }

    .bottom-sheet-btn {
      width: 100%;
      text-align: center;
      padding: 20px 12px;
      font-size: 14px;
      border-radius: var(--radius-lg);
      background: var(--color-surface);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      font-weight: 500;
      transition: all 0.2s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 12px;
      color: var(--color-text);
      opacity: 0;
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .bottom-sheet-overlay.is-active .bottom-sheet-btn {
      animation: lustre-reveal 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    }

    .bottom-sheet-overlay.is-active .bottom-sheet-btn:nth-child(1) { animation-delay: 0.05s; }
    .bottom-sheet-overlay.is-active .bottom-sheet-btn:nth-child(2) { animation-delay: 0.10s; }
    .bottom-sheet-overlay.is-active .bottom-sheet-btn:nth-child(3) { animation-delay: 0.15s; }
    .bottom-sheet-overlay.is-active .bottom-sheet-btn:nth-child(4) { animation-delay: 0.20s; }
    .bottom-sheet-overlay.is-active .bottom-sheet-btn:nth-child(5) { animation-delay: 0.25s; }
    .bottom-sheet-overlay.is-active .bottom-sheet-btn:nth-child(6) { animation-delay: 0.30s; }


    .bottom-sheet-btn:hover {
      background: var(--color-accent-subtle);
      border-color: var(--color-accent);
      color: var(--color-accent);
      transform: none;
      box-shadow: 4px 4px 0px var(--color-accent);
    }

    .bottom-sheet-btn i {
      width: 24px;
      height: 24px;
    }

    .bottom-sheet-btn:active {
      transform: translateY(0);
      box-shadow: 0px 0px 0px var(--color-border);
    }


    @media (max-width: 768px) {
      .app-meta .collab-status,
      .app-meta .share-result {
        max-width: 80px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        display: inline-block;
        vertical-align: middle;
      }
      .desktop-only {
        display: none !important;
      }
      .mobile-only {
        display: inline-flex;
      }

      .app-main {
        display: flex;
        flex-direction: column;
        padding: 0;
        gap: 0;
      }

      .panel-editor,
      .panel-preview {
        flex: 1;
        width: 100%;
        display: none;
      }

      .splitter {
        display: none !important;
      }

      .panel-preview {
        border-left: none;
        border-radius: 0;
        border: none;
        box-shadow: none;
      }

      /* View switching logic */
      .app-main.view-editor .panel-editor {
        display: flex;
      }

      .app-main.view-preview .panel-preview {
        display: flex;
      }

      /* Fallback if no class is set */
      .app-main:not(.view-preview):not(.view-editor) .panel-editor {
        display: flex;
      }

      .app-header {
        padding: calc(var(--spacing-sm) + var(--safe-area-inset-top)) calc(var(--spacing-md) + var(--safe-area-inset-right)) var(--spacing-sm) calc(var(--spacing-md) + var(--safe-area-inset-left));
      }

      .editor-textarea,
      .preview-content {
        padding: var(--spacing-md);
      }
    }


    /* === Notes Modal === */
    .modal-overlay {
      position: fixed;
      top: 0; left: 0; right: 0; bottom: 0;
      background: rgba(0,0,0,0.5);
      display: flex;
      align-items: center;
      justify-content: center;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.2s ease;
      z-index: 100;
    }

    .modal-overlay.is-active {
      opacity: 1;
      pointer-events: auto;
    }

    .modal-content {
      background: var(--color-surface);
      border-radius: var(--radius-lg);
      width: 90%;
      max-width: 500px;
      max-height: 80vh;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-md);
      overflow: hidden;
    }

    .modal-header {
      padding: var(--spacing-md) calc(var(--spacing-lg) + var(--safe-area-inset-right)) var(--spacing-md) calc(var(--spacing-lg) + var(--safe-area-inset-left));
      border-bottom: 1px solid var(--color-border);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-family: var(--font-editor);
      font-weight: 500;
    }

    .modal-body {
      padding: var(--spacing-md) calc(var(--spacing-lg) + var(--safe-area-inset-right)) var(--spacing-md) calc(var(--spacing-lg) + var(--safe-area-inset-left));
      overflow-y: auto;
      flex: 1;
    }

    .modal-footer {
      padding: var(--spacing-md) calc(var(--spacing-lg) + var(--safe-area-inset-right)) var(--spacing-md) calc(var(--spacing-lg) + var(--safe-area-inset-left));
      border-top: 1px solid var(--color-border);
      display: flex;
      justify-content: flex-end;
      gap: var(--spacing-sm);
    }


    .form-group {
      margin-bottom: var(--spacing-md);
    }
    .form-group label {
      display: block;
      font-family: var(--font-editor);
      font-size: 13px;
      font-weight: 500;
      margin-bottom: var(--spacing-xs);
      color: var(--color-text);
    }
    .form-control {
      width: 100%;
      padding: var(--spacing-sm) var(--spacing-md);
      font-family: var(--font-ui);
      font-size: 14px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      background: var(--color-bg);
      color: var(--color-text);
      outline: none;
      transition: border-color 0.15s ease;
      box-sizing: border-box;
    }
    .form-control:focus {
      border-color: var(--color-accent);
    }
    .form-hint {
      font-family: var(--font-editor);
      font-size: 11px;
      color: var(--color-muted);
      margin-top: 4px;
    }

    .note-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: var(--spacing-sm);
    }


    /* === Notes List Styling === */
    .note-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 16px;
      border-bottom: 1px solid var(--color-border);
      border-radius: 0;
      cursor: pointer;
      transition: all 0.2s ease;
      background: var(--color-surface);
    }

    .note-item:first-child {
      border-top-left-radius: var(--radius-md);
      border-top-right-radius: var(--radius-md);
    }
    .note-item:last-child {
      border-bottom: none;
      border-bottom-left-radius: var(--radius-md);
      border-bottom-right-radius: var(--radius-md);
    }

    .note-item:hover {
      background: var(--color-bg);
    }

    .note-item-icon {
      color: var(--color-accent);
      margin-right: 16px;
      width: 24px;
      height: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .note-item-content {
      display: flex;
      flex-direction: column;
      flex: 1;
      gap: 4px;
    }

    .note-item-title {
      font-family: var(--font-ui);
      font-weight: 600;
      font-size: 14px;
      color: var(--color-text);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .note-item-meta {
      font-size: 12px;
      color: var(--color-muted);
      display: flex;
      gap: 16px;
    }

    .note-item-actions {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .note-edit-btn {
      color: var(--color-accent);
      font-family: var(--font-editor);
      font-size: 11px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      background: transparent;
      border: none;
      padding: 4px 8px;
      cursor: pointer;
    }

    .note-item-delete {
      color: var(--color-muted);
      background: none;
      border: none;
      cursor: pointer;
      padding: 4px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
    }

    .note-item-delete:hover {
      color: #dc2626;
      background: #fee2e2;
    }

    .note-item-delete.confirming {
      background: #fee2e2;
      color: #dc2626;
      padding: 4px 8px;
    }


    /* === Print === */
    @media print {
      .app-header, .panel-label, .panel-editor {
        display: none !important;
      }
      .app-main {
        display: block;
      }
      .panel-preview {
        border: none;
      }
      .splitter {
        display: none !important;
      }
      .preview-content {
        overflow: visible;
        padding: 0;
      }
      body {
      -webkit-touch-callout: none;
      -webkit-user-select: none;
      user-select: none;
        background: white;
      }
    }

/* Editor Tabs */
.editor-tabs {
  display: flex;
  background: transparent;
  border-bottom: 1px solid var(--color-border);
  padding: 0 16px;
  align-items: flex-end;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  scrollbar-width: none;
  scroll-snap-type: x mandatory;
}
.editor-tabs::-webkit-scrollbar {
  display: none;
}
.editor-tab {
  padding: 10px 20px;
  cursor: pointer;
  scroll-snap-align: start;
  background: transparent;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-muted);
  white-space: nowrap;
  user-select: none;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  transition: all 0.2s ease;
  margin-right: 4px;
}
.editor-tab.active {
  background: var(--color-editor-bg);
  color: var(--color-accent);
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  border-bottom: 2px solid var(--color-accent);
  margin-bottom: -1px;
  z-index: 10;
  box-shadow: var(--shadow-sm);
}
.editor-tab-close {
  margin-left: 8px;
  color: var(--color-muted);
  font-size: 1.1em;
  line-height: 1;
}
.editor-tab-close:hover {
  color: var(--color-text);
}
.editor-tab-new {
  padding: 8px 16px;
  cursor: pointer;
  font-weight: bold;
  color: var(--color-primary);
}
.editor-tab-new:hover {
  background: var(--color-surface);
}

/* Update Toast */
#update-toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  padding: 12px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 9999;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
}

#update-toast.show {
  transform: translateY(0);
  opacity: 1;
}

#update-toast button {
  background-color: var(--color-accent);
  color: var(--color-bg);
  border: none;
  padding: 6px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-editor);
  font-weight: 500;
}

#update-toast button:hover {
  background-color: #55c8ff;
}

/* Widget Wrappers (Mindmaps, Diagrams, Charts) */
.widget-wrapper {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin: 1rem 0;
  overflow: hidden;
  position: relative;
  background: var(--color-surface);
}

.widget-toolbar {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 8px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.widget-toolbar-btn {
  background: var(--color-surface);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
}

.widget-toolbar-btn:hover {
  background: var(--color-border);
  color: var(--color-text);
}

/* Global Lightbox */
.global-lightbox {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.8);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  padding: 2rem;
}

.global-lightbox.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--color-surface);
  color: var(--color-text);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 24px;
  cursor: pointer;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-close-btn:hover {
  background: var(--color-border);
}

.lightbox-content {
  background: var(--color-bg);
  padding: 1rem;
  border-radius: 8px;
  max-width: 90vw;
  max-height: 90vh;
  overflow: auto;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.lightbox-content svg, .lightbox-content img {
  max-width: 100%;
  max-height: 80vh;
}


    .plugin-inputs-container {
      display: flex;
      gap: 8px;
      margin-bottom: 10px;
    }
    .plugin-inputs-container input[type="text"] {
      width: 100%;
      box-sizing: border-box;
      padding: 4px;
      font-family: var(--font-editor);
    }
    .plugin-inputs-container input#newPluginName {
      flex: 1;
    }
    .plugin-inputs-container input#newPluginUrl {
      flex: 2;
    }

    @media (max-width: 768px) {
      .plugin-inputs-container {
        flex-direction: column;
      }
      .plugin-inputs-container md-button {
        width: 100%;
      }
      .plugin-inputs-container input#newPluginName,
      .plugin-inputs-container input#newPluginUrl {
        flex: none;
      }
    }

    /* === Desktop Plugins/Notes Modal overriding Bottom Sheet === */

    @media (min-width: 769px) {
      .bottom-sheet-overlay[data-bind="pluginsModal"],
      .bottom-sheet-overlay[data-bind="notesModal"] {
        align-items: center;
        justify-content: center;
        display: flex; /* Override bottom sheet default block if any */
      }
      .bottom-sheet-overlay[data-bind="pluginsModal"] md-bottom-sheet,
      .bottom-sheet-overlay[data-bind="notesModal"] md-bottom-sheet {
        position: relative;
        bottom: auto;
        left: auto;
        right: auto;
        width: 90%;
        max-width: 800px;
        background: var(--color-bg);
        max-height: 80vh;
        border-radius: var(--radius-lg);
        transform: scale(0.95);
        opacity: 0;
        transition: opacity 0.2s ease, transform 0.2s ease;
      }
      .bottom-sheet-overlay[data-bind="pluginsModal"].is-active md-bottom-sheet,
      .bottom-sheet-overlay[data-bind="notesModal"].is-active md-bottom-sheet {
        transform: scale(1);
        opacity: 1;
      }
      .bottom-sheet-overlay[data-bind="pluginsModal"] .bottom-sheet-handle,
      .bottom-sheet-overlay[data-bind="notesModal"] .bottom-sheet-handle {
        display: none;
      }
    }
/* Frontend design aesthetic variables included */

/* Removed inline style replacements */
.app-version {
  font-size: 0.8em;
  color: var(--color-muted);
  margin-left: 0.5rem;
  font-family: var(--font-editor);
}

.collab-status {
  font-size: 0.8em;
  color: var(--color-muted);
  margin-right: var(--spacing-md);
}

.turnstile-form-group {
  margin-top: 1rem;
}

.bottom-sheet-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.plugin-guide-link {
  font-size: 12px;
  margin-left: 10px;
  color: var(--color-link);
  text-decoration: none;
}

.plugins-table-container {
  max-height: 200px;
  overflow-y: auto;
  margin-bottom: 10px;
}

.plugins-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.plugins-table th {
  padding: 4px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
}

.plugins-table .action-col {
  width: 60px;
}

.plugin-picker-container {
  margin-bottom: 10px;
}

.plugin-picker-label {
  font-size: 12px;
  color: var(--color-muted);
  display: block;
  margin-bottom: 4px;
}

.plugin-picker-select {
  width: 100%;
  padding: 5px;
  font-family: var(--font-editor);
  font-size: 13px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  cursor: pointer;
}

.btn-add-plugin {
  padding: 4px 8px;
}

.plugin-enable-container {
  margin-top: 8px;
}

.exit-collab-btn {
  display: none;
}

/* Settings Modal Classes */
.settings-modal {
  width: min(420px, 92vw);
}

.settings-form-hint {
  font-size: 12px;
  opacity: 0.7;
  margin-bottom: 4px;
}

.settings-section-title {
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  font-size: 1.1em;
}

.settings-form-group {
  margin-bottom: 12px;
}

.settings-checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
}

.settings-label {
  display: block;
  margin-bottom: 4px;
  font-size: 14px;
}

.settings-control {
  width: 100%;
  padding: 8px;
  box-sizing: border-box;
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.settings-modal-footer {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 16px;
}

.settings-cancel-btn {
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  background: transparent;
  cursor: pointer;
  border-radius: 4px;
  color: var(--color-text);
}

.settings-save-btn {
  padding: 6px 14px;
  background: var(--color-accent);
  color: var(--color-bg);
  font-weight: bold;
  cursor: pointer;
  border: none;
  border-radius: 4px;
}

/* Modal Footer Alignment */
.modal-footer {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
  align-items: center;
}

/* === Empty States === */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem 1rem;
  color: var(--color-muted);
}

.empty-state-icon {
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.empty-state-icon i {
  width: 48px;
  height: 48px;
}

.empty-state-title {
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--color-text);
  position: relative;
}

.empty-state-title::before {
  content: "✨";
  position: absolute;
  left: -24px;
  top: -4px;
  font-size: 1.2em;
  opacity: 0.8;
}

.empty-state-title::after {
  content: "✨";
  position: absolute;
  right: -24px;
  top: -4px;
  font-size: 1.2em;
  opacity: 0.8;
}

.empty-state-description {
  font-size: 0.9em;
  max-width: 250px;
  margin: 0 auto;
  line-height: 1.4;
}

/* Zen Minimalist Aesthetic Utilities & Animations */

html, body {
  overflow-x: hidden;
}

.app-shell {
  overflow-x: hidden;
  background-image:
    radial-gradient(at 40% 20%, hsla(28,100%,74%,0.2) 0px, transparent 50%),
    radial-gradient(at 80% 0%, hsla(189,100%,56%,0.2) 0px, transparent 50%),
    radial-gradient(at 0% 50%, hsla(355,100%,93%,0.2) 0px, transparent 50%),
    radial-gradient(at 80% 50%, hsla(340,100%,76%,0.2) 0px, transparent 50%),
    radial-gradient(at 0% 100%, hsla(22,100%,77%,0.2) 0px, transparent 50%),
    radial-gradient(at 80% 100%, hsla(242,100%,70%,0.2) 0px, transparent 50%),
    radial-gradient(at 0% 0%, hsla(343,100%,76%,0.2) 0px, transparent 50%);
  background-color: var(--color-bg);
  background-size: cover;
  background-attachment: fixed;
}

.app-shell::after {
  display: none; /* Hide noise filter for cleaner look */
}

@keyframes glow-pulse {
  0% { box-shadow: 0 0 0 0 var(--color-accent-subtle); }
  50% { box-shadow: 0 0 20px 5px var(--color-accent-subtle); }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.glow-save {
  animation: glow-pulse 1s ease-out;
}

@keyframes easter-egg-glow {
  0% { filter: hue-rotate(0deg) brightness(1); }
  50% { filter: hue-rotate(180deg) brightness(1.1); }
  100% { filter: hue-rotate(360deg) brightness(1); }
}

.glow-easter-egg {
  animation: easter-egg-glow 2s linear;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
  20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.shake-error {
  animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
}