*{box-sizing:border-box;margin:0;padding:0}
:root{
--bg:#f4f5f7;--card:#fff;--text:#1a1a2e;--muted:#888;
--border:#ddd;--accent:#0066cc;--accent-hover:#0052a3;
--green:#28a745;--red:#dc3545;--yellow:#ffc107;
--radius:8px;--shadow:0 1px 3px rgba(0,0,0,.1);
}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
background:var(--bg);color:var(--text);max-width:600px;margin:0 auto;
padding:0 0 24px;font-size:14px;line-height:1.5}

header{display:flex;align-items:center;justify-content:space-between;
padding:12px 16px;background:var(--accent);color:#fff}
header h1{font-size:16px;font-weight:600}

nav{display:flex;overflow-x:auto;background:#fff;
border-bottom:2px solid var(--border);-webkit-overflow-scrolling:touch}
.tab{flex:1;padding:10px 6px;border:none;background:none;
font-size:13px;font-weight:500;color:var(--muted);cursor:pointer;
white-space:nowrap;border-bottom:2px solid transparent;margin-bottom:-2px}
.tab.active{color:var(--accent);border-bottom-color:var(--accent)}

main{padding:12px}

.panel{display:none}
.panel.active{display:block}

.card{background:var(--card);border-radius:var(--radius);
padding:16px;margin-bottom:12px;box-shadow:var(--shadow)}
.card h2{font-size:15px;margin-bottom:10px;padding-bottom:6px;border-bottom:1px solid var(--border)}
.card h3{font-size:13px;margin:10px 0 6px;display:flex;align-items:center;gap:8px}

.kv{display:flex;justify-content:space-between;padding:4px 0;font-size:13px}
.kv span:first-child{color:var(--muted)}

.dot{width:10px;height:10px;border-radius:50%;display:inline-block;flex-shrink:0}
.dot.on{background:var(--green)}
.dot.off{background:var(--red)}
.dot.warn{background:var(--yellow)}

.form-group{margin:8px 0}
.form-group label{display:block;font-size:12px;color:var(--muted);margin-bottom:2px}
.form-group input,.form-group select{width:100%;padding:8px 10px;border:1px solid var(--border);
border-radius:var(--radius);font-size:14px;background:#fff}
.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--accent)}

.cb{display:flex;align-items:center;gap:8px;padding:6px 0;font-size:13px;cursor:pointer}
.cb input{width:16px;height:16px}

.btn{display:inline-block;padding:10px 20px;border:none;border-radius:var(--radius);
background:var(--accent);color:#fff;font-size:14px;font-weight:500;
cursor:pointer;margin-top:8px;width:100%;text-align:center}
.btn:hover{background:var(--accent-hover)}
.btn.warn{background:var(--yellow);color:#333}
.btn.danger{background:var(--red);margin-top:8px}
.btn-sm{padding:4px 12px;font-size:12px;border:1px solid var(--border);
border-radius:var(--radius);background:#fff;cursor:pointer}
.btn-sm:hover{background:var(--bg)}

.net-list{max-height:180px;overflow-y:auto;border:1px solid var(--border);
border-radius:var(--radius);margin-bottom:8px}
.net-item{display:flex;justify-content:space-between;align-items:center;
padding:8px 10px;border-bottom:1px solid var(--border);cursor:pointer;font-size:13px}
.net-item:last-child{border-bottom:none}
.net-item:hover{background:var(--bg)}
.net-item .ssid{font-weight:500}
.net-item .meta{color:var(--muted);font-size:12px}

.readings-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:6px}
.readings-grid .rd{text-align:center;padding:6px;background:var(--bg);border-radius:4px}
.readings-grid .rd .lbl{font-size:11px;color:var(--muted)}
.readings-grid .rd .val{font-size:15px;font-weight:600}

.muted{color:var(--muted);font-size:13px;padding:12px 0;text-align:center}

.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);
padding:10px 24px;border-radius:var(--radius);color:#fff;font-size:13px;
z-index:999;transition:opacity .3s;box-shadow:0 2px 8px rgba(0,0,0,.2)}
.toast.ok{background:var(--green)}
.toast.err{background:var(--red)}
.toast.hidden{opacity:0;pointer-events:none}