:root{--bg:#f4f7fb;--card:#fff;--text:#182230;--muted:#718096;--blue:#2563eb;--green:#16a34a;--red:#dc2626;--border:#e5eaf1}*{box-sizing:border-box}body{margin:0;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--text)}.sidebar{position:fixed;inset:0 auto 0 0;width:240px;background:#0f172a;color:#fff;padding:22px 14px}.brand{font-size:21px;font-weight:800;padding:8px 12px 22px}.accent{color:#60a5fa}.userbox{background:#17233a;border:1px solid #26344e;border-radius:12px;padding:12px;margin-bottom:18px}.userbox small{display:block;color:#94a3b8;margin-top:4px}.sidebar nav a{display:block;color:#cbd5e1;text-decoration:none;padding:11px 12px;border-radius:9px;margin:3px 0}.sidebar nav a:hover{background:#1e293b;color:#fff}.sidebar .logout{margin-top:18px;color:#fecaca}.main{margin-left:240px;padding:28px;min-height:100vh}.top{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px}.top h1{margin:0 0 5px;font-size:28px}.muted{color:var(--muted)}.pill{background:#ecfdf5;color:#15803d;padding:8px 12px;border-radius:20px;font-size:13px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:0 5px 20px #0f172a08}.stat{font-size:30px;font-weight:800}.tank{height:190px;display:flex;align-items:center;justify-content:center;position:relative}.tank svg{width:150px;height:180px}.tanktext{position:absolute;font-size:25px;font-weight:800}.status{font-weight:700}.on{color:var(--green)}.off{color:var(--red)}.btn{border:0;border-radius:9px;padding:10px 14px;cursor:pointer;font-weight:700;text-decoration:none;display:inline-block}.primary{background:var(--blue);color:#fff}.danger{background:#fee2e2;color:#991b1b}.secondary{background:#eef2f7;color:#334155}.form{max-width:650px}.field{margin-bottom:15px}.field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}.field input,.field select{width:100%;padding:11px 12px;border:1px solid #d9e0ea;border-radius:9px;font-size:15px;background:#fff}.tablewrap{overflow:auto;background:#fff;border:1px solid var(--border);border-radius:14px}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:13px 14px;border-bottom:1px solid var(--border);text-align:left;white-space:nowrap}.table th{background:#f8fafc;font-size:12px;text-transform:uppercase;color:#64748b}.notice{padding:12px 14px;border-radius:10px;background:#eff6ff;color:#1d4ed8;margin-bottom:15px}.alert{padding:12px 14px;border-radius:10px;background:#fef2f2;color:#b91c1c;margin-bottom:15px}.auth{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#0f172a,#1d4ed8)}.login{width:min(420px,92vw);background:#fff;padding:32px;border-radius:20px;box-shadow:0 25px 70px #0004}.login h1{margin-top:0}.switch{display:flex;gap:10px;align-items:center}.small{font-size:12px;color:var(--muted)}@media(max-width:800px){.sidebar{position:static;width:auto}.main{margin:0;padding:16px}.top{align-items:flex-start;gap:10px}.sidebar nav{display:flex;flex-wrap:wrap}.sidebar nav a{padding:8px}.brand{padding-bottom:10px}}

/* Token key display */
.token-copy-row{display:flex;align-items:center;gap:8px;min-width:220px}
.token-preview{display:inline-block;max-width:190px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#0f172a;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono",monospace;font-size:12px}
.token-copy-btn{border:0;background:#f1f1f1;color:#111827;border-radius:9px;padding:7px 12px;cursor:pointer;font-weight:700;font-size:13px;white-space:nowrap}
.token-copy-btn:hover{background:#e5e7eb}
.new-token-row{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid #dbe3ec;border-radius:9px;padding:10px 12px;max-width:620px}
.new-token-preview{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#0b4a9e;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono",monospace;font-size:13px}


/* Device online/offline + Wi-Fi signal */
.device-status{display:inline-flex;align-items:center;gap:7px;font-weight:800;font-size:13px}
.device-online{color:#15803d}.device-offline{color:#dc2626}
.status-dot{width:9px;height:9px;border-radius:50%;display:inline-block;background:currentColor;box-shadow:0 0 0 3px color-mix(in srgb,currentColor 12%,transparent)}
.wifi-cell{display:flex;align-items:center;gap:9px;min-width:130px}
.wifi-cell b{display:block;font-size:12px;line-height:1.1}.wifi-cell small{display:block;color:#64748b;font-size:11px;margin-top:3px}
.wifi-bars{display:flex;align-items:flex-end;gap:2px;height:22px;width:25px}.wifi-bars i{display:block;width:5px;border-radius:2px;background:#cbd5e1}.wifi-bars i:nth-child(1){height:6px}.wifi-bars i:nth-child(2){height:11px}.wifi-bars i:nth-child(3){height:16px}.wifi-bars i:nth-child(4){height:21px}
.wifi-excellent i,.wifi-good i,.wifi-fair i,.wifi-weak i,.wifi-veryweak i{background:#16a34a}.wifi-fair i:nth-child(n+3){background:#cbd5e1}.wifi-weak i:nth-child(n+2){background:#cbd5e1}.wifi-veryweak i{background:#dc2626}.wifi-veryweak i:nth-child(n+2){background:#cbd5e1}.wifi-none i{background:#cbd5e1}
@media(max-width:900px){.wifi-cell{min-width:110px}}

/* Professional water tank dashboard */
.dashboard-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:18px}.summary-card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:16px 18px;display:flex;align-items:center;gap:13px;box-shadow:0 5px 20px #0f172a08}.summary-card span{display:block;color:#64748b;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.05em}.summary-card strong{display:block;font-size:24px;margin-top:3px}.summary-icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;font-weight:900;font-size:18px}.summary-icon.blue{background:#dbeafe;color:#2563eb}.summary-icon.green{background:#dcfce7;color:#16a34a}.summary-icon.purple{background:#ede9fe;color:#7c3aed}.summary-icon.orange{background:#ffedd5;color:#ea580c}.tank-dashboard-card{background:#fff;border:1px solid var(--border);border-radius:20px;box-shadow:0 8px 30px #0f172a0b;margin-bottom:18px;overflow:hidden}.tank-card-head{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;border-bottom:1px solid #edf1f6;background:linear-gradient(180deg,#fff,#fbfdff)}.eyebrow{font-size:11px;color:#2563eb;font-weight:800;letter-spacing:.12em;margin-bottom:5px}.tank-card-head h2{margin:0;font-size:22px}.tank-owner{color:#64748b;font-size:13px;margin-top:4px}.pump-state{font-size:13px;font-weight:800;display:flex;align-items:center;gap:8px}.pump-state span{width:10px;height:10px;border-radius:50%;background:currentColor;box-shadow:0 0 0 5px color-mix(in srgb,currentColor 10%,transparent)}.pump-on{color:#16a34a}.pump-off{color:#dc2626}.tank-main-grid{display:grid;grid-template-columns:330px 1fr;gap:10px;padding:22px}.tank-image-panel{min-height:350px;background:linear-gradient(145deg,#eff6ff,#f8fbff);border:1px solid #dbeafe;border-radius:18px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.tank-image-panel:after{content:"";position:absolute;inset:auto -30px -70px;height:160px;background:#bfdbfe33;border-radius:50%}.water-tank-image{width:290px;max-width:90%;position:relative;z-index:1}.tank-level-badge{position:absolute;z-index:2;bottom:18px;right:18px;border-radius:14px;padding:10px 13px;background:#fff;box-shadow:0 8px 25px #0f172a1a;border:1px solid #e2e8f0;text-align:center}.tank-level-badge strong{display:block;font-size:20px}.tank-level-badge small{display:block;color:#64748b;font-size:10px;text-transform:uppercase;font-weight:800}.tank-level-badge.level-low{color:#dc2626}.tank-level-badge.level-normal{color:#2563eb}.tank-level-badge.level-high{color:#16a34a}.tank-level-panel{padding:8px 8px 8px 18px}.level-heading{display:flex;justify-content:space-between;align-items:end;gap:15px}.level-heading .muted{font-size:13px;font-weight:700}.big-level{font-size:42px;font-weight:900;line-height:1.05;margin-top:3px}.level-range{display:flex;gap:10px;color:#64748b;font-size:11px;font-weight:800}.level-track{height:14px;background:#e8eef6;border-radius:999px;margin-top:18px;overflow:hidden}.level-fill{height:100%;border-radius:999px;transition:width .5s ease}.level-fill.level-low{background:linear-gradient(90deg,#ef4444,#f97316)}.level-fill.level-normal{background:linear-gradient(90deg,#38bdf8,#2563eb)}.level-fill.level-high{background:linear-gradient(90deg,#22c55e,#16a34a)}.level-scale{display:flex;justify-content:space-between;color:#94a3b8;font-size:10px;margin-top:5px}.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}.metric{background:#f8fafc;border:1px solid #e8edf3;border-radius:12px;padding:12px}.metric span{display:block;color:#64748b;font-size:11px;font-weight:700;margin-bottom:5px}.metric>strong{font-size:15px}.metric .device-status{font-size:13px}.device-status{display:inline-flex;align-items:center;gap:7px}.device-status .status-dot{width:8px;height:8px}.device-health-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}.wifi-health{border:1px solid #e8edf3;border-radius:12px;padding:10px 12px;background:#fff}.wifi-health>span{display:block;color:#64748b;font-size:11px;font-weight:700;margin-bottom:7px}.wifi-inline{display:flex;align-items:center;gap:9px}.wifi-inline strong{font-size:13px}.wifi-inline small{color:#64748b;font-size:11px}.pump-actions{display:flex;gap:10px;margin-top:16px}.pump-btn{padding:11px 17px}.empty-dashboard{text-align:center;padding:50px}.empty-icon{font-size:42px;margin-bottom:10px}
@media(max-width:1100px){.dashboard-stats{grid-template-columns:repeat(2,1fr)}.tank-main-grid{grid-template-columns:280px 1fr}.tank-image-panel{min-height:320px}}
@media(max-width:800px){.dashboard-stats{grid-template-columns:1fr 1fr}.tank-main-grid{grid-template-columns:1fr}.tank-image-panel{min-height:280px}.tank-level-panel{padding:8px 0}.tank-card-head{align-items:flex-start;gap:12px}.metric-grid,.device-health-row{grid-template-columns:1fr}.level-heading{align-items:flex-start;flex-direction:column}.pump-actions{flex-wrap:wrap}}
@media(max-width:520px){.dashboard-stats{grid-template-columns:1fr}.tank-card-head{padding:16px}.tank-main-grid{padding:14px}.pump-state{font-size:11px}.pump-btn{width:100%}}

/* Tank monitoring device selector */
.monitor-selector-card{background:#fff;border:1px solid var(--border);border-radius:18px;box-shadow:0 8px 30px #0f172a0a;padding:18px 20px;margin-bottom:18px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.monitor-selector-copy{display:flex;align-items:center;gap:14px;min-width:0}
.monitor-selector-icon{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#dbeafe,#eff6ff);font-size:23px;flex:0 0 auto}
.monitor-selector-copy h2{margin:2px 0 3px;font-size:18px}
.monitor-selector-copy p{margin:0;color:#718096;font-size:12px}
.monitor-selector-form{width:min(480px,48%)}
.monitor-selector-form label{display:block;color:#64748b;font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px}
.monitor-select-wrap{position:relative}
.monitor-select-wrap select{appearance:none;width:100%;height:46px;padding:0 42px 0 14px;border:1px solid #d8e0ea;border-radius:11px;background:#f8fafc;color:#182230;font-size:14px;font-weight:700;outline:none;cursor:pointer;box-shadow:inset 0 1px 2px #0f172a08}
.monitor-select-wrap select:focus{border-color:#2563eb;box-shadow:0 0 0 3px #2563eb18;background:#fff}
.monitor-select-wrap span{position:absolute;right:15px;top:9px;font-size:22px;color:#64748b;pointer-events:none}
@media(max-width:800px){.monitor-selector-card{align-items:stretch;flex-direction:column}.monitor-selector-form{width:100%}}