:root{
  --bg:#0e1116; --panel:#171b22; --panel2:#1f2530; --line:#2a313c;
  --txt:#e6e9ef; --muted:#8a93a2; --accent:#3b82f6; --accent2:#2563eb;
  --ok:#22c55e; --off:#4b5563; --warn:#f59e0b;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--txt);font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
.hidden{display:none !important}
.muted{color:var(--muted)}
.small{font-size:13px}
.err{color:#ef4444;font-size:14px;margin-top:8px;min-height:18px}
button{cursor:pointer;border:none;border-radius:10px;background:var(--accent);color:#fff;padding:11px 16px;font-size:15px;font-weight:600}
button:active{transform:translateY(1px)}
button.gray{background:var(--panel2);color:var(--txt);border:1px solid var(--line)}
button.icon{background:transparent;font-size:20px;padding:6px 10px}
input{background:var(--panel2);border:1px solid var(--line);color:var(--txt);border-radius:10px;padding:11px 12px;font-size:15px;width:100%}
input[type=checkbox]{width:auto}
label{display:block;margin:10px 0 4px;color:var(--muted);font-size:14px}
.row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.chk{display:flex;align-items:center;gap:8px;color:var(--txt)}

/* LOGIN */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.login-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:28px 22px;width:100%;max-width:360px}
.login-card h1{margin:0 0 2px;font-size:24px}
.login-card input{margin-top:12px}
.login-card button{margin-top:16px;width:100%}

/* HEADER */
header{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;
  padding:12px 16px;background:var(--panel);border-bottom:1px solid var(--line)}
.brand{font-weight:700}
.hdr-right{display:flex;align-items:center;gap:6px}
.pill{font-size:12px;color:var(--muted);background:var(--panel2);border:1px solid var(--line);padding:4px 9px;border-radius:20px}

/* TABS */
.tabs{display:flex;gap:4px;padding:10px 12px 0;background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:53px;z-index:4}
.tab{background:transparent;color:var(--muted);border-radius:10px 10px 0 0;padding:10px 14px;font-size:14px}
.tab.active{color:var(--txt);background:var(--panel2)}

main{padding:14px;max-width:760px;margin:0 auto}
.bar{display:flex;gap:10px;align-items:center;margin-bottom:12px;flex-wrap:wrap}
.bar input{flex:1;min-width:160px}

/* DEVICE LIST */
.list{display:flex;flex-direction:column;gap:10px}
.dev{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:13px 14px;display:flex;align-items:center;gap:12px}
.dev .dot{width:11px;height:11px;border-radius:50%;background:var(--off);flex:none}
.dev.on .dot{background:var(--ok);box-shadow:0 0 8px var(--ok)}
.dev .info{flex:1;min-width:0}
.dev .name{font-weight:600;font-size:15px;display:flex;align-items:center;gap:7px}
.dev .name .tag{font-size:11px;background:var(--panel2);border:1px solid var(--line);color:var(--muted);padding:1px 6px;border-radius:6px;font-weight:500}
.dev .sub{color:var(--muted);font-size:12.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}
.dev .acts{display:flex;gap:4px;flex:none}
.dev .acts button{padding:7px 9px;font-size:15px}
.dev.hiddenrow{opacity:.5}

/* CARD */
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;margin-bottom:14px}
.card h3{margin:0 0 6px}
.card button{margin-top:14px}

/* MODAL */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:flex-end;justify-content:center;z-index:20}
.modal-card{background:var(--panel);border:1px solid var(--line);border-radius:16px 16px 0 0;width:100%;max-width:760px;max-height:88vh;overflow:auto;padding:16px}
.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
@media(min-width:600px){.modal{align-items:center}.modal-card{border-radius:16px}}

/* HEATMAP */
.heat{overflow-x:auto;-webkit-overflow-scrolling:touch}
.heat table{border-collapse:collapse;font-size:10px;color:var(--muted)}
.heat td,.heat th{width:13px;height:18px;text-align:center;padding:0}
.heat th{font-weight:500}
.heat .cell{border-radius:3px;background:var(--panel2)}
.stat-row{display:flex;gap:10px;flex-wrap:wrap;margin:6px 0 14px}
.stat{background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:8px 12px;flex:1;min-width:90px}
.stat b{display:block;font-size:18px}
.stat span{font-size:12px;color:var(--muted)}
.legend{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--muted);margin-top:8px}
.legend i{width:14px;height:14px;border-radius:3px;display:inline-block}
.bars{display:flex;flex-direction:column;gap:6px;margin-top:6px}
.barrow{display:flex;align-items:center;gap:8px;font-size:13px}
.barrow .lbl{width:38px;color:var(--muted)}
.barrow .track{flex:1;background:var(--panel2);border-radius:6px;height:14px;overflow:hidden}
.barrow .fill{height:100%;background:var(--accent)}