:root{
  --bg:#0e1116;--bg2:#151a21;--bg3:#1c232c;--line:#2a3340;--line2:#3a4757;
  --fg:#e6edf3;--fg2:#9aa7b4;--fg3:#6b7887;--accent:#4c8dff;--accent2:#2f6be0;
  --ok:#3fb950;--warn:#d29922;--err:#f85149;--radius:8px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{background:var(--bg);color:var(--fg);font:14px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;overflow:hidden}
.hidden{display:none!important}
#app{display:flex;height:100vh}
#sidebar{width:236px;flex:0 0 236px;background:var(--bg2);border-right:1px solid var(--line);display:flex;flex-direction:column}
.brand{display:flex;align-items:center;gap:10px;padding:14px 14px 12px}
.logo{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--accent),#7b5cff);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;letter-spacing:.5px}
.brand-text strong{display:block;font-size:13px;letter-spacing:1.2px}
.brand-text small{color:var(--fg3);font-size:11px}
.nav{display:flex;padding:0 8px 8px;gap:4px}
.nav-item{flex:1;padding:7px 0;font-size:12px;background:transparent;color:var(--fg2);border:1px solid transparent;border-radius:6px;cursor:pointer}
.nav-item:hover{color:var(--fg);background:var(--bg3)}
.nav-item.active{color:#fff;background:var(--bg3);border-color:var(--line2)}
.side-section{padding:10px 12px;border-top:1px solid var(--line)}
.side-section.grow{flex:1;min-height:0;display:flex;flex-direction:column}
.side-title{font-size:11px;color:var(--fg3);letter-spacing:1px;margin-bottom:8px}
.select,.input{width:100%;padding:8px 10px;background:var(--bg3);border:1px solid var(--line2);border-radius:6px;color:var(--fg);font-size:13px;outline:none}
.select:focus,.input:focus{border-color:var(--accent)}
.btn{padding:7px 12px;background:var(--bg3);color:var(--fg);border:1px solid var(--line2);border-radius:6px;font-size:13px;cursor:pointer;white-space:nowrap}
.btn:hover{background:#232c37}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent2);border-color:var(--accent2);color:#fff}
.btn.primary:hover{background:var(--accent)}
.btn.ghost{background:transparent}
.btn.tiny{padding:3px 8px;font-size:12px}
.btn.block{width:100%;display:block;margin-top:8px}
.node-list{flex:1;overflow:auto;font-size:12px}
.node-item{padding:6px 8px;border-radius:6px;cursor:pointer;color:var(--fg2);display:flex;gap:6px;align-items:center}
.node-item:hover{background:var(--bg3);color:var(--fg)}
.node-item .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);flex:0 0 6px}
.node-item .nm{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.side-footer{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border-top:1px solid var(--line);font-size:12px;color:var(--fg2)}
#main{flex:1;display:flex;flex-direction:column;min-width:0}
#topbar{height:50px;flex:0 0 50px;display:flex;align-items:center;justify-content:space-between;padding:0 14px;border-bottom:1px solid var(--line);background:var(--bg2)}
.crumb{font-size:13px;color:var(--fg2)}
.tools{display:flex;align-items:center;gap:8px}
.zoom{display:flex;align-items:center;gap:6px;color:var(--fg2);font-size:12px}
#viewport{position:relative;flex:1;overflow:hidden;background:
  radial-gradient(circle at 1px 1px,#232c37 1px,transparent 0) 0 0/24px 24px,var(--bg)}
#board{position:absolute;inset:0;width:100%;height:100%;cursor:grab;display:block}
#board.dragging{cursor:grabbing}
.hud{position:absolute;left:12px;bottom:12px;font-size:11px;color:var(--fg3);pointer-events:none}
.panel{position:absolute;top:50px;right:0;bottom:0;width:340px;background:var(--bg2);border-left:1px solid var(--line);padding:14px;overflow:auto;z-index:5}
.panel h3{font-size:13px;margin-bottom:10px;color:var(--fg)}
.row{display:flex;gap:8px;margin-bottom:8px}
.row>*{flex:1;min-width:0}
.lbl{font-size:11px;color:var(--fg3);margin-bottom:4px;display:block}
.mask{position:fixed;inset:0;background:rgba(6,9,13,.86);display:flex;align-items:center;justify-content:center;z-index:50;backdrop-filter:blur(3px)}
.login-card{width:300px;padding:24px;background:var(--bg2);border:1px solid var(--line2);border-radius:12px}
.login-card h1{font-size:16px;letter-spacing:2px;margin-bottom:4px}
.login-card .hint{font-size:12px;color:var(--fg3);margin-bottom:16px}
.login-card .input{margin-bottom:10px}
.err{color:var(--err);font-size:12px;min-height:16px;margin-top:8px}
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:#222b35;border:1px solid var(--line2);color:var(--fg);padding:9px 16px;border-radius:8px;font-size:13px;z-index:99;max-width:80vw}
.toast.err{border-color:var(--err)}
.toast.ok{border-color:var(--ok)}
.card{border:1px solid var(--line);border-radius:8px;padding:10px;margin-bottom:8px;background:var(--bg3)}
.card .t{font-size:12px;color:var(--fg);margin-bottom:4px;word-break:break-all}
.card .m{font-size:11px;color:var(--fg3)}
.tag{display:inline-block;padding:1px 6px;border-radius:4px;font-size:10px;background:#26303c;color:var(--fg2);margin-right:4px}
.tag.ok{background:#16351f;color:#4ec97a}
.tag.warn{background:#3a2f12;color:#e0b341}
.tag.err{background:#3a1a19;color:#ff8078}
.empty{color:var(--fg3);font-size:12px;padding:12px 0;text-align:center}