:root{--bg: #0b121c;--panel: #101a29;--panel-2: #0e1725;--line: #223046;--fg: #e6edf6;--fg-dim: #93a4bb;--fg-faint: #5c7089;--accent: #4da3ff;--ok: #5dd39e;--warn: #f0b429;--err: #ef8080}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%}body{background:var(--bg);color:var(--fg);font-family:Segoe UI,Microsoft YaHei,sans-serif;font-size:14px;overflow:hidden}#app{display:grid;grid-template-columns:424px 1fr;height:100vh}.pane{background:var(--panel-2);border-right:1px solid var(--line);display:flex;flex-direction:column;overflow:hidden}.pane-head{padding:16px 20px 12px;border-bottom:1px solid var(--line)}.brand{font-size:17px;font-weight:600;line-height:1.4}.brand span{display:block;margin-top:4px;font-size:12px;font-weight:400;color:var(--fg-faint)}.block{padding:12px 20px;border-bottom:1px solid var(--line)}.block.grow{flex:1;min-height:220px;display:flex;flex-direction:column;border-bottom:1px solid var(--line)}.lbl{display:block;font-size:12px;color:var(--fg-dim);margin-bottom:6px}.row-between{display:flex;align-items:center;justify-content:space-between}.row-between .lbl{margin-bottom:0}.input{width:100%;background:var(--panel);border:1px solid #2c3d55;border-radius:6px;color:var(--fg);padding:7px 10px;font-size:13px;outline:none}.input:focus{border-color:var(--accent)}.code{flex:1;width:100%;min-height:160px;margin-top:8px;background:#0a121e;border:1px solid #2c3d55;border-radius:8px;color:#d7e3f2;padding:10px 12px;font-family:Consolas,Cascadia Mono,Courier New,monospace;font-size:12.5px;line-height:1.55;resize:none;outline:none;-moz-tab-size:4;tab-size:4}.code:focus{border-color:var(--accent)}.mini-btns{display:flex;gap:6px}.mini{background:transparent;border:1px solid #2c3d55;color:var(--fg-dim);border-radius:5px;padding:2px 8px;font-size:11.5px;cursor:pointer}.mini:hover{border-color:var(--accent);color:var(--accent)}.samples{display:flex;flex-wrap:wrap;gap:6px}.smp{background:var(--panel);border:1px solid #2c3d55;color:var(--fg-dim);border-radius:6px;padding:4px 10px;font-size:12px;cursor:pointer}.smp:hover{border-color:var(--accent);color:var(--accent)}.actions{display:flex;flex-wrap:wrap;gap:8px}.btn{background:var(--panel);border:1px solid #2c3d55;color:var(--fg);border-radius:7px;padding:7px 13px;font-size:12.5px;cursor:pointer}.btn:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.btn:disabled{opacity:.42;cursor:not-allowed}.btn.primary{background:#123a63;border-color:#1d5c9e;color:#bcd9ff;font-weight:600}.btn.primary:hover{background:#17497b;color:#dcebff}.status{display:flex;align-items:center;gap:7px;margin-top:10px;font-size:12.5px;color:var(--fg-dim);min-height:18px}.status .dot{width:7px;height:7px;border-radius:50%;background:var(--fg-faint);flex:none}.status.ok .dot{background:var(--ok)}.status.warn .dot{background:var(--warn)}.status.err .dot{background:var(--err)}.status.ok #status-text{color:#b6d8c7}.status.warn #status-text{color:#e6cf9a}.status.err #status-text{color:#f0b6b6}.note{margin-top:8px;font-size:11.5px;color:var(--fg-faint);line-height:1.6}.pane-foot{padding:10px 20px 12px;font-size:11.5px;color:var(--fg-faint);line-height:1.6}.pane-foot a{color:var(--accent);text-decoration:none}.stage{position:relative;overflow:hidden;background:#0d1420}.view{width:100%;height:100%;border:0;display:block}.placeholder{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;padding:24px;background:#0d1420;z-index:2}.placeholder.hidden{display:none}.ph-card{max-width:560px;border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:24px 28px}.ph-card h2{font-size:16px;margin-bottom:12px}.ph-card ul{margin-left:18px;line-height:2;font-size:13px;color:var(--fg-dim)}.ph-card b{color:var(--accent)}@media (max-width: 980px){html,body{overflow:auto}#app{grid-template-columns:1fr;height:auto}.stage{height:70vh}}