*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #ffffff;--surface: #f5f5f5;--surface2: #ebebeb;--border: #d0d0d0;--accent: #2563eb;--accent-hover: #1d4ed8;--text: #111111;--text-muted: #666666;--radius: 8px;--radius-sm: 4px}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:14px;line-height:1.5;min-height:100vh}.app{max-width:640px;margin:0 auto;padding:48px 24px 80px}.back-link{display:inline-block;color:var(--text-muted);text-decoration:none;font-size:13px;font-weight:600;margin-bottom:24px}.back-link:hover{color:var(--accent)}.header{text-align:center;margin-bottom:32px}.header h1{font-size:2rem;font-weight:700;letter-spacing:-.02em}.subtitle{color:var(--text-muted);margin-top:8px}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px}.field{display:flex;flex-direction:column;gap:8px}.control-label{font-size:12px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;display:flex;align-items:center;gap:8px}.control-value{display:inline-block;background:var(--accent);color:#fff;font-size:11px;padding:1px 7px;border-radius:20px;font-weight:700}.textarea{background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-family:inherit;font-size:14px;padding:10px 12px;resize:vertical;outline:none;transition:border-color .15s}.textarea:focus{border-color:var(--accent)}.controls{display:flex;flex-wrap:wrap;gap:24px;margin-top:20px}.control-group{display:flex;flex-direction:column;gap:8px;flex:1;min-width:140px}.slider{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:4px;background:var(--border);border-radius:2px;outline:none;cursor:pointer}.slider::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--accent);cursor:pointer}.slider::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--accent);border:none;cursor:pointer}.select{background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:14px;padding:8px 12px;outline:none;cursor:pointer;transition:border-color .15s}.select:focus{border-color:var(--accent)}.preview{margin-top:24px;min-height:200px;display:flex;align-items:center;justify-content:center;background:var(--bg);border:1px dashed var(--border);border-radius:var(--radius);padding:20px}.preview__empty{color:var(--text-muted);text-align:center;font-size:13px}.preview canvas{max-width:100%;height:auto;display:block}.actions{display:flex;justify-content:flex-end;margin-top:20px}.btn{display:inline-flex;align-items:center;gap:6px;padding:9px 18px;border-radius:var(--radius-sm);font-size:14px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:background .15s;line-height:1}.btn--primary{background:var(--accent);color:#fff}.btn--primary:hover{background:var(--accent-hover)}.btn:disabled{opacity:.4;cursor:not-allowed}@media(max-width:480px){.controls{flex-direction:column}}