:root{
  --bg:#0d1117; --panel:#161b22; --panel2:#1c232c; --line:#2a313c;
  --text:#e6edf3; --muted:#8b949e; --accent:#f0a020;
  --good:#3fb950; --bad:#f85149; --warn:#d29922;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--text);
  font:14px/1.45 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}
.hidden{display:none!important}
.accent{color:var(--accent)}
.muted{color:var(--muted)}
.tiny{font-size:12px}
.center{text-align:center}
code{background:var(--panel2);padding:1px 5px;border-radius:4px;font-size:12px}
button{font:inherit;cursor:pointer;border:0;border-radius:8px;
  background:var(--accent);color:#1a1205;font-weight:600;padding:10px 16px}
button.ghost{background:transparent;color:var(--muted);border:1px solid var(--line);font-weight:500;padding:7px 12px}
button:hover{filter:brightness(1.07)}

/* login */
.login{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;
  padding:28px;max-width:420px;width:100%}
.card h1{margin:0 0 4px;font-size:24px}
.card input{width:100%;margin:14px 0 12px;padding:11px 13px;border-radius:8px;
  border:1px solid var(--line);background:var(--bg);color:var(--text);font:inherit}
.card button{width:100%}
.err{color:var(--bad);min-height:18px;margin:10px 0 0}

/* app chrome */
header{display:flex;align-items:center;gap:14px;padding:14px 20px;
  border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--bg);z-index:5}
.brand{font-size:18px;font-weight:700}
.spacer{flex:1}

/* summary */
.summary{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:12px;padding:18px 20px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.stat .k{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.04em}
.stat .v{font-size:26px;font-weight:700;margin-top:4px}

/* rig cards */
.rigs{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));
  gap:12px;padding:4px 20px 40px}
.rig{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.rig.off{opacity:.62}
.rig .top{display:flex;align-items:center;gap:8px;margin-bottom:10px}
.dot{width:9px;height:9px;border-radius:50%;flex:none}
.dot.on{background:var(--good);box-shadow:0 0 0 3px rgba(63,185,80,.18)}
.dot.off{background:var(--bad);box-shadow:0 0 0 3px rgba(248,81,73,.16)}
.rig .nm{font-weight:650;font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rig .age{margin-left:auto;color:var(--muted);font-size:12px;flex:none}
.rig .hrow{display:flex;align-items:baseline;gap:8px;margin:2px 0 10px}
.rig .hr{font-size:22px;font-weight:700}
.rig .algo{color:var(--muted);font-size:12px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:4px 14px;font-size:13px}
.grid2 .lbl{color:var(--muted)}
.grid2 .val{text-align:right}
.val.hot{color:var(--warn)}
.gpus{margin-top:10px;border-top:1px solid var(--line);padding-top:8px;font-size:12px}
.gpus .g{display:flex;justify-content:space-between;gap:8px;padding:1px 0}
.gpus .g b{color:var(--text)}
.err-line{color:var(--bad);font-size:12px;margin-top:8px;word-break:break-word}

@media (max-width:520px){
  .summary{grid-template-columns:1fr 1fr}
  header{padding:12px 14px}
  .rigs,.summary{padding-left:14px;padding-right:14px}
}