:root{--bg: #ece5dd;--panel: #ffffff;--panel-text: #111b21;--muted: #667781;--border: #d8dcdf;--input: #f0f2f5;--header-bar: #075e54;--header-text: #ffffff;--accent: #25d366}*{box-sizing:border-box}html,body{margin:0;height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--panel-text);display:flex;flex-direction:column;transition:background .3s ease}.topbar{background:var(--header-bar);color:var(--header-text);box-shadow:0 1px 4px #00000026;z-index:2}.topbar-inner{max-width:1200px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;gap:12px}.topbar h1{font-size:1.15rem;font-weight:600;margin:0}.logo{font-size:1.5rem}.layout{flex:1;display:grid;grid-template-columns:1fr 360px;gap:20px;max-width:1200px;width:100%;margin:0 auto;padding:20px;min-height:0}.viewer{display:flex;flex-direction:column;min-height:0}#canvas-wrap{flex:1;border-radius:14px;overflow:hidden;box-shadow:0 4px 24px #0000001f;min-height:420px;background:#000}#canvas-wrap canvas{display:block;width:100%;height:100%}.hint{text-align:center;color:var(--muted);font-size:.8rem;margin:8px 0 0}.panel{background:var(--panel);color:var(--panel-text);border-radius:14px;padding:22px;box-shadow:0 4px 24px #0000001f;align-self:start;transition:background .3s ease,color .3s ease}.panel h2{margin:0 0 18px;font-size:1.05rem}.field{display:block;margin-bottom:16px}.field>span,.field-label{display:block;font-size:.78rem;font-weight:600;color:var(--muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.03em}input[type=text],textarea{width:100%;border:1px solid var(--border);background:var(--input);color:var(--panel-text);border-radius:8px;padding:10px 12px;font-size:.95rem;font-family:inherit;resize:vertical}input[type=text]:focus,textarea:focus{outline:none;border-color:var(--accent)}.field-row{display:flex;gap:12px}.field-row .col{flex:1;display:block}.field-row .col>span{display:block;font-size:.78rem;font-weight:600;color:var(--muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.03em}.swatches{display:flex;flex-wrap:wrap;gap:8px}.swatch{width:26px;height:26px;border-radius:50%;border:2px solid transparent;padding:0;cursor:pointer;transition:transform .1s ease}.swatch:hover{transform:scale(1.12)}.swatch.active{border-color:var(--panel-text);box-shadow:0 0 0 2px var(--panel)}.theme-toggle{display:flex;gap:8px}.theme-btn{flex:1;padding:9px;border:1px solid var(--border);background:var(--input);color:var(--panel-text);border-radius:8px;cursor:pointer;font-size:.9rem;transition:all .15s ease}.theme-btn.active{border-color:var(--accent);background:var(--accent);color:#fff}.actions{display:flex;flex-direction:column;gap:10px;margin-top:22px}button.primary,button.secondary{padding:12px;border-radius:8px;cursor:pointer;font-size:.95rem;font-weight:600;border:none;transition:filter .15s ease}button.primary{background:var(--accent);color:#fff}button.secondary{background:transparent;color:var(--accent);border:1px solid var(--accent)}button.primary:hover,button.secondary:hover{filter:brightness(.93)}.note{font-size:.72rem;color:var(--muted);line-height:1.4;margin:14px 0 0}@media (max-width: 820px){.layout{grid-template-columns:1fr}#canvas-wrap{min-height:320px}}