:root{--bg: #f4f6f9;--panel: #ffffff;--line: #e3e8ef;--text: #0f172a;--muted: #64748b;--accent: #2563eb;--accent-soft: #e8efff;--danger: #dc2626;font-family:Inter,Segoe UI,system-ui,-apple-system,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}html,body,#root{margin:0;height:100%}.app{display:flex;flex-direction:column;height:100%}.topbar{display:flex;align-items:center;gap:16px;height:56px;padding:0 18px;background:var(--panel);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:16px;white-space:nowrap}.brand-mark{color:var(--accent)}.ai-badge{font-size:11px;font-weight:600;padding:3px 8px;border-radius:999px;background:#dcfce7;color:#166534}.ai-badge.demo{background:#fef3c7;color:#92400e}.name{flex:1;max-width:340px;font-size:15px;font-weight:600;border:1px solid transparent;background:transparent;padding:6px 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var(--accent)}.swatch-label{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);margin-right:4px}.file{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:64px;height:36px;padding:0 10px;border:1px dashed #b6c2d2;border-radius:8px;font-size:12px;color:var(--muted);cursor:pointer;background:#fff;overflow:hidden}.file.small{height:32px;border-style:solid;border-color:var(--line);color:var(--text);font-size:13px}.file img{max-height:30px;max-width:90px}.file input{position:absolute;top:0;right:0;bottom:0;left:0;opacity:0;cursor:pointer}.check{display:inline-flex;align-items:center;gap:4px;font-size:13px;text-transform:capitalize}.preview{display:flex;flex-direction:column;align-items:center;gap:6px;padding:10px;background:#eef2f6;border-radius:10px}.preview canvas{border-radius:2px;box-shadow:0 1px 4px 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