:root{--bg: #eceff2;--surface: #ffffff;--border: #d8dde2;--input-border: #ccd3da;--text: #1e252b;--muted: #58636d;--label: #39434c;--primary: #17212b;--primary-pressed: #293743;--danger: #b3261e;--accent: #f7f9fb;font-family:Segoe UI,system-ui,-apple-system,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%}button,input,textarea{font:inherit}body{background:var(--bg)}.app-shell{min-height:100vh;display:flex;flex-direction:column}.app-header{background:var(--surface);border-bottom:1px solid var(--border);padding:10px 16px 12px;position:sticky;top:0;z-index:10}.app-header h1{margin:0;font-size:22px;letter-spacing:.02em}.brand-row{display:flex;align-items:center;gap:10px;margin-bottom:10px}.brand-logo{height:88px;width:auto;max-width:min(100%,520px);display:block;object-fit:contain;object-position:left 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var(--input-border);border-radius:5px;font-size:12px}.rt-hint{margin:0;padding:6px 10px 8px;font-size:11px;color:var(--muted);line-height:1.35;border-top:1px solid var(--border)}.rt-editor .ProseMirror{min-height:88px;padding:8px 10px;outline:none;font-size:14px;line-height:1.4}.rt-editor .ProseMirror p{margin:0 0 .35em}.rt-editor .ProseMirror ul{margin:.2em 0;padding-left:1.2em}.rich-text.compact .rt-editor .ProseMirror{min-height:56px}.ProseMirror p.is-editor-empty:first-child:before{color:#98a2ab;content:attr(data-placeholder);float:left;height:0;pointer-events:none}.mc-html strong,.mc-html b{font-weight:700}.mc-html em,.mc-html i{font-style:italic}.mc-html u{text-decoration:underline}.menu-canvas-host{display:flex;flex-direction:column;align-items:center;gap:10px}.menu-canvas-stage{position:relative}.menu-canvas-page{position:absolute;left:0;top:0;overflow:hidden;box-shadow:0 12px 36px 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