:root{
  --bg:#0e1014; --panel:#141924; --panel2:#11151d; --card:#161c27; --line:#232b3a;
  --txt:#e9eef6; --muted:#8b97a8; --accent:#6aa9ff; --ok:#4fd18b; --danger:#ff6b6b;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
body{margin:0;background:var(--bg);color:var(--txt);
  font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,sans-serif}
a{color:var(--accent);text-decoration:none}
.muted{color:var(--muted)}

.shell{display:grid;grid-template-columns:250px 1fr;min-height:100vh}
aside{background:var(--panel2);border-right:1px solid var(--line);padding:20px 16px;display:flex;flex-direction:column;gap:6px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.3px;padding:0 6px 14px}
.mark{width:22px;height:22px;border-radius:7px;background:linear-gradient(140deg,#6aa9ff,#8b7bff);display:grid;place-items:center;font-size:12px;color:#0b0e14;font-weight:800}
.ver{font-size:10.5px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:1px 7px;margin-left:auto}
.side-label{font-size:10.5px;letter-spacing:.9px;text-transform:uppercase;color:var(--muted);padding:12px 8px 6px}
.nav{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:10px;color:#cbd5e3;font-size:14px}
.nav:hover{background:#1a2130}
.nav.active{background:#1d2637;color:#fff;box-shadow:inset 2px 0 0 var(--accent)}
.nav .ico{width:18px;text-align:center;opacity:.85}
aside .foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;padding-top:14px;border-top:1px solid var(--line)}
.sysinfo{font-size:11.5px;color:var(--muted);display:flex;flex-direction:column;gap:2px}

main{padding:26px 30px;min-width:0}
.page-head{display:flex;align-items:flex-end;gap:14px;flex-wrap:wrap;margin-bottom:22px}
h1{margin:0;font-size:22px;font-weight:680}
.sub{color:var(--muted);font-size:13.5px;margin:2px 0 0}
.spacer{flex:1}
.clock{font:12.5px ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--muted);
  border:1px solid var(--line);border-radius:8px;padding:5px 10px;background:var(--panel)}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.tool{background:var(--card);border:1px solid var(--line);border-radius:15px;padding:18px;display:flex;flex-direction:column;gap:12px;
  transition:border-color .15s,transform .15s}
.tool:hover{border-color:#31405a;transform:translateY(-1px)}
.tool-top{display:flex;align-items:center;gap:11px}
.badge{width:36px;height:36px;border-radius:11px;background:#1b2433;display:grid;place-items:center;font-size:16px;color:var(--accent)}
.tool h3{margin:0;font-size:15.5px;font-weight:640}
.kicker{font-size:11px;text-transform:uppercase;letter-spacing:.7px;color:var(--muted)}
.tool p{margin:0;font-size:13.2px;color:#b8c3d3;min-height:38px}
.tool-foot{display:flex;align-items:center;gap:10px;margin-top:auto}
.state{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;color:var(--muted)}
.state i{width:7px;height:7px;border-radius:50%;background:var(--muted);display:inline-block}
.state.up i{background:var(--ok);box-shadow:0 0 9px rgba(79,209,139,.7)}
.state.down i{background:var(--danger)}
.btn{background:linear-gradient(180deg,#7fb2ff,#5f8df5);color:#08111f;border:0;border-radius:10px;
  padding:8px 14px;font-weight:650;font-size:13.5px;cursor:pointer}
.btn.ghost{background:transparent;color:var(--txt);border:1px solid var(--line);font-weight:500}
.dashed{border:1px dashed #2c3547;border-radius:15px;padding:18px;color:var(--muted);font-size:13px;display:grid;place-items:center;text-align:center}
.empty{color:var(--muted);padding:40px 0}

/* login */
.login-wrap{min-height:100vh;display:grid;place-items:center;padding:20px}
.login-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:30px;width:min(390px,100%);
  box-shadow:0 26px 70px rgba(0,0,0,.55)}
.login-card form{display:flex;flex-direction:column;gap:10px;margin-top:16px}
.login-card label{font-size:12.5px;color:var(--muted)}
.login-card input{background:var(--panel);border:1px solid var(--line);border-radius:10px;color:var(--txt);padding:11px 13px;outline:none}
.login-card input:focus{border-color:var(--accent)}
.err{color:var(--danger);font-size:13px;margin:4px 0 0}

@media (max-width:760px){
  .shell{grid-template-columns:1fr}
  aside{flex-direction:row;align-items:center;gap:8px;padding:12px;border-right:0;border-bottom:1px solid var(--line);overflow-x:auto}
  .brand{padding:0 8px 0 0}
  aside .foot,aside .side-label{display:none}
  main{padding:18px}
}