:root{--bar:#1f2330;--bar-2:#272c3b;--bar-line:#343a4d;--txt:#e8eaf0;--muted:#9aa0b4;--accent:#4c8bf5;--panel:#ffffff;--grid:#eef0f4;--grid-strong:#e3e6ee}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:#fff;color:#1c1f2b}#app{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column}.topbar{height:54px;flex:0 0 54px;background:var(--bar);color:var(--txt);display:flex;align-items:center;gap:14px;padding:0 14px;border-bottom:1px solid var(--bar-line);-webkit-user-select:none;user-select:none;z-index:20;flex-wrap:nowrap;overflow-x:auto;overflow-y:hidden}.ctx-bar{display:flex;flex:0 0 auto;background:var(--bar-2);color:var(--txt);align-items:center;gap:10px;padding:5px 14px;border-bottom:1px solid var(--bar-line);z-index:19;flex-wrap:nowrap;overflow-x:auto;overflow-y:hidden;height:38px;transition:opacity .15s}.ctx-bar.empty{opacity:.3}.brand{display:flex;align-items:center;gap:9px;font-weight:600;font-size:15px;letter-spacing:.3px}.brand .dot{width:11px;height:11px;border-radius:3px;background:linear-gradient(135deg,#4c8bf5,#7c5cff);box-shadow:0 0 0 3px #4c8bf52e}.brand small{color:var(--muted);font-weight:400;font-size:12px}.sep{width:1px;height:26px;background:var(--bar-line);margin:0 4px}.spacer{flex:1}.tools{display:flex;align-items:center;gap:4px;background:var(--bar-2);padding:4px;border-radius:11px}.tool{display:flex;align-items:center;gap:7px;height:34px;padding:0 11px;border-radius:8px;color:var(--txt);background:transparent;border:none;cursor:pointer;font-size:13px;transition:background .15s,color .15s;white-space:nowrap}.tool:hover{background:#ffffff0f}.tool.active{background:#fff;color:#1c1f2b;font-weight:600;box-shadow:0 1px 2px #00000040}.tool svg{width:17px;height:17px;flex:0 0 17px}.tool kbd{font-size:10px;color:var(--muted);background:#ffffff14;padding:1px 5px;border-radius:4px}.tool.active kbd{color:#7a8094;background:#eef0f4}.ctx-bar .ctx{display:flex;align-items:center;gap:8px}.ctx.hidden{display:none}.swatches{display:flex;gap:5px}.sw{width:22px;height:22px;border-radius:6px;cursor:pointer;border:2px solid transparent;transition:transform .1s}.sw:hover{transform:scale(1.12)}.sw.sel{border-color:#fff;box-shadow:0 0 0 2px var(--accent)}input[type=color]{width:28px;height:28px;border:none;background:none;padding:0;cursor:pointer;border-radius:6px}input[type=range]{width:90px;accent-color:var(--accent);cursor:pointer}input[type=range].fs-slider{width:200px}.ctx label{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:6px;white-space:nowrap}.zoom{display:flex;align-items:center;gap:3px;background:var(--bar-2);padding:4px;border-radius:11px}.zbtn{width:30px;height:30px;border-radius:8px;border:none;background:transparent;color:var(--txt);cursor:pointer;font-size:16px}.zbtn:hover{background:#ffffff12}.zval{width:54px;text-align:center;font-size:12px;color:var(--txt);cursor:pointer;background:none;border:none}.iconbtn{width:34px;height:34px;border-radius:9px;border:none;background:transparent;color:var(--muted);cursor:pointer}.iconbtn:hover{background:#ffffff12;color:var(--txt)}.stage{position:relative;flex:1;overflow:hidden;background:#fff;cursor:default}#board{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;display:block;touch-action:none}.stage.tool-note,.stage.tool-pen,.stage.tool-connect{cursor:crosshair}.stage.tool-pan{cursor:grab}.stage.panning{cursor:grabbing}.stage.space{cursor:grab}#editor{position:absolute;display:none;border:none;outline:none;resize:none;overflow:hidden;background:transparent;font-family:inherit;line-height:1.32;box-sizing:border-box;box-shadow:0 0 0 2px var(--accent);z-index:5}.minimap{position:absolute;right:16px;bottom:16px;width:212px;height:150px;background:#ffffffeb;border:1px solid #dfe3ec;border-radius:12px;box-shadow:0 6px 22px #14182824;overflow:hidden;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:8}.minimap canvas{width:100%;height:100%;display:block;cursor:pointer}.minimap .mm-title{position:absolute;left:9px;top:7px;font-size:10px;color:#8b91a5;letter-spacing:.4px;pointer-events:none}.hint{position:absolute;left:16px;bottom:16px;background:#1f2330e6;color:#e8eaf0;font-size:12px;padding:8px 24px 8px 12px;border-radius:9px;line-height:1.7;z-index:8;max-width:300px;box-shadow:0 6px 22px #1418282e;-webkit-user-select:none;user-select:none}.hint-close{position:absolute;top:6px;right:8px;background:transparent;border:none;color:#9aa0b4;font-size:16px;cursor:pointer;line-height:1;padding:0 2px;border-radius:4px}.hint-close:hover{color:#fff;background:#ffffff26}.hint b{color:#fff}.hint kbd{background:#ffffff24;padding:1px 6px;border-radius:4px;font-size:11px}.toast{position:absolute;top:14px;left:50%;transform:translate(-50%);background:#1f2330f0;color:#fff;font-size:12px;padding:8px 14px;border-radius:9px;z-index:30;opacity:0;transition:opacity .3s;pointer-events:none}.presence{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted)}.avatars{display:flex}.av{width:24px;height:24px;border-radius:50%;margin-left:-7px;border:2px solid var(--bar);display:flex;align-items:center;justify-content:center;font-size:11px;color:#fff;font-weight:600}.av:first-child{margin-left:0}.net{display:flex;align-items:center;gap:6px}.net-id{font-size:11px;color:var(--muted);max-width:132px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;background:var(--bar-2);padding:5px 9px;border-radius:7px;border:1px solid var(--bar-line)}.rid{width:96px;height:30px;background:var(--bar-2);border:1px solid var(--bar-line);color:var(--txt);border-radius:7px;padding:0 8px;font-size:12px;outline:none}.rid:focus{border-color:var(--accent)}.net-count{font-size:11px;color:var(--muted);white-space:nowrap}.tool.mini{height:30px;padding:0 12px;font-size:12px}@media (max-width: 768px){.topbar{height:44px;padding:0 6px;gap:3px}.brand{font-size:12px;gap:5px}.brand small{display:none}.brand .dot{width:9px;height:9px}.tools{padding:2px;gap:1px}.tool{padding:0 7px;height:30px;gap:0;font-size:0}.tool svg{width:16px;height:16px;flex-basis:16px}.tool kbd{display:none}.ctx-bar{padding:4px 8px;gap:6px}.ctx-bar .ctx{gap:4px}.swatches{gap:3px}.sw{width:18px;height:18px;border-radius:4px;border-width:1.5px}input[type=color]{width:24px;height:24px;border-radius:4px}input[type=range]{width:60px}.ctx label{font-size:10px;gap:3px}.spacer{display:none}.presence{gap:4px;font-size:10px}.avatars .av{width:20px;height:20px;font-size:9px;margin-left:-5px}#online-count{font-size:10px}.net{gap:3px}.net-id{max-width:60px;font-size:9px;padding:3px 5px}.rid{width:64px;height:26px;font-size:11px;padding:0 5px}.tool.mini{height:26px;padding:0 8px;font-size:11px}.net-count,.sep{display:none}.zoom{gap:1px;padding:2px}.zbtn{width:26px;height:26px;font-size:14px;border-radius:6px}.zval{width:36px;font-size:10px}.iconbtn{width:26px;height:26px;border-radius:6px}.iconbtn svg{width:13px;height:13px}.minimap{display:none}.hint{max-width:170px;font-size:10px;padding:6px 20px 6px 8px;line-height:1.5;left:8px;bottom:8px}.hint-close{top:4px;right:4px;font-size:14px}.toast{font-size:11px;padding:6px 12px;top:8px}#editor{padding:8px;border-radius:6px;box-shadow:0 0 0 2px var(--accent)}}@media (max-width: 480px){.brand{display:none}.tool{padding:0 5px}.presence,.net-id{display:none}.ctx-bar{padding:3px 6px;gap:4px}.ctx-bar .ctx{gap:3px}.sw{width:16px;height:16px}.swatches{gap:2px}.hint{display:none}}