:root{--bg:#f4f7fb;--ink:#132238;--muted:#66758a;--nav:#0d1b2a;--primary:#146c94;--accent:#19a7ce;--card:#fff;--line:#dfe7ef;--ok:#139b61;--warn:#ef8b17;--danger:#d83b45;--shadow:0 14px 38px rgba(31,54,79,.10)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.45 Inter,Segoe UI,Arial,sans-serif}a{text-decoration:none;color:inherit}.topbar{height:72px;background:var(--nav);color:#fff;display:flex;align-items:center;padding:0 28px;gap:28px;position:sticky;top:0;z-index:20;box-shadow:0 5px 20px rgba(0,0,0,.14)}.brand{display:flex;align-items:center;gap:11px}.brand b{display:block;font-size:18px}.brand small{display:block;color:#9fb3c8}.brand-mark{width:40px;height:40px;border-radius:11px;background:linear-gradient(135deg,var(--accent),#5bd1d7);display:grid;place-items:center;font-weight:800}.topbar nav{display:flex;gap:8px;flex:1}.topbar nav a{padding:10px 13px;border-radius:8px;color:#c7d5e4}.topbar nav a:hover,.topbar nav a.active{background:rgba(255,255,255,.1);color:#fff}.user-pill{color:#bfd0df;font-size:12px}.page{padding:28px;max-width:1540px;margin:auto}.hero{border-radius:22px;background:linear-gradient(115deg,#0d3553,#146c94 62%,#19a7ce);padding:34px;color:white;display:flex;justify-content:space-between;align-items:center;box-shadow:var(--shadow);margin-bottom:24px}.hero.compact{padding:26px 30px}.hero h1{margin:4px 0 5px;font-size:30px}.hero p{margin:0;color:#d7edf7}.eyebrow{font-size:11px;letter-spacing:1.7px;font-weight:700;color:#bfeaf7}.hero-actions{display:flex;align-items:center;gap:10px}.kpi-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:15px;margin-bottom:26px}.kpi-grid.four{grid-template-columns:repeat(4,1fr)}.kpi{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px 20px;box-shadow:0 7px 22px rgba(20,40,65,.05)}.kpi span{display:block;color:var(--muted);font-size:12px}.kpi strong{display:block;font-size:28px;margin-top:5px}.kpi .small-value{font-size:16px;margin-top:12px}.section-head{display:flex;justify-content:space-between;align-items:center;margin:8px 0 14px}.section-head h2,.form-card h2,.table-card h2{margin:0;font-size:19px}.section-head p{margin:3px 0 0;color:var(--muted)}input,select{border:1px solid #ccd8e5;border-radius:9px;padding:10px 12px;background:white;min-height:40px;color:var(--ink)}label{display:block;font-weight:600;margin:12px 0 6px}.btn{border:0;border-radius:9px;padding:10px 15px;font-weight:650;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}.btn.primary{background:var(--primary);color:white}.btn.ghost{background:white;color:var(--ink);border:1px solid var(--line)}.hero .btn.ghost{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.25);color:white}.wide{width:100%}.device-grid{display:grid;grid-template-columns:repeat(4,minmax(240px,1fr));gap:18px}.device-card{background:white;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 8px 28px rgba(24,47,74,.07);transition:.2s;border-top:4px solid var(--ok)}.device-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.device-card.alarm{border-top-color:var(--danger)}.device-card.offline{border-top-color:#8b98a8;filter:saturate(.75)}.device-top{display:flex;justify-content:space-between}.device-icon{width:52px;height:52px;border-radius:14px;background:#eaf6fb;display:grid;place-items:center;font-size:26px;overflow:hidden}.device-icon img{width:100%;height:100%;object-fit:cover}.status-dot{height:27px;padding:5px 9px;border-radius:20px;background:#e5f7ef;color:var(--ok);font-size:11px;font-weight:750}.alarm .status-dot{background:#fdebed;color:var(--danger)}.offline .status-dot{background:#eef1f4;color:#697787}.device-card h3{margin:14px 0 2px}.device-card p{margin:0;color:var(--muted);min-height:40px}.reading{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:15px 0}.reading>div{background:#f6f9fc;border-radius:12px;padding:11px}.reading span{display:block;font-size:11px;color:var(--muted)}.reading b{font-size:23px}.reading small{margin-left:2px}.limits,.signal{display:flex;justify-content:space-between;color:var(--muted);font-size:11px;border-top:1px solid #edf1f5;padding-top:10px}.signal{margin-top:8px}.chart-card,.table-card,.form-card,.filter-card{background:white;border:1px solid var(--line);border-radius:17px;padding:20px;box-shadow:0 8px 26px rgba(24,47,74,.06);margin-bottom:20px}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:11px;border-bottom:1px solid #e9eef4;white-space:nowrap}th{font-size:11px;text-transform:uppercase;letter-spacing:.6px;color:#617084;background:#f8fafc}.split{display:grid;grid-template-columns:360px 1fr;gap:20px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.form-card input,.form-card select{width:100%}.filter-card{display:flex;gap:10px;align-items:center}.alert{padding:12px 15px;border-radius:10px;margin:10px 0 18px}.alert.success{background:#e8f8f0;color:#087c49}.alert.danger{background:#fdebed;color:#a91f2a}.link-btn{border:0;background:none;color:var(--primary);cursor:pointer}.danger-text{color:var(--danger)}.empty{background:white;padding:30px;border-radius:14px;border:1px dashed #cbd7e3;color:var(--muted)}footer{text-align:center;color:#8190a2;padding:24px}.login-body{min-height:100vh;background:#0d1b2a;display:grid;place-items:center;padding:24px}.login-shell{max-width:1080px;width:100%;display:grid;grid-template-columns:1.25fr .75fr;background:white;border-radius:24px;overflow:hidden;box-shadow:0 28px 80px rgba(0,0,0,.3)}.login-visual{padding:58px;background:linear-gradient(135deg,#0b3652,#146c94 60%,#19a7ce);color:white}.login-visual h1{font-size:38px;line-height:1.17;margin-top:70px}.login-visual p{color:#d4edf7;font-size:16px}.feature-row{display:flex;gap:18px;margin-top:35px;color:#e8f8ff}.login-card{padding:55px 42px;display:flex;flex-direction:column;justify-content:center}.login-card h2{font-size:28px;margin:0}.login-card p{color:var(--muted)}.login-card input{width:100%}.login-card small{margin-top:25px;color:var(--muted)}@media(max-width:1100px){.device-grid{grid-template-columns:repeat(2,1fr)}.kpi-grid{grid-template-columns:repeat(3,1fr)}.topbar nav{overflow:auto}.user-pill{display:none}}@media(max-width:700px){.page{padding:14px}.topbar{padding:0 12px}.topbar nav a{padding:8px}.brand div{display:none}.hero{display:block;padding:22px}.hero-actions{margin-top:15px;flex-wrap:wrap}.kpi-grid,.kpi-grid.four{grid-template-columns:1fr 1fr}.device-grid{grid-template-columns:1fr}.split,.login-shell{grid-template-columns:1fr}.login-visual{display:none}.filter-card{flex-wrap:wrap}.form-grid{grid-template-columns:1fr}}

/* Professional upgrade */
.inline-form{display:inline}.form-actions{display:flex;gap:10px;margin-top:16px}.checkbox-label{display:flex;gap:8px;align-items:center}.checkbox-label input{min-height:auto;width:auto}.form-card textarea{width:100%;border:1px solid #ccd8e5;border-radius:9px;padding:10px 12px;font:inherit}.alert-split{grid-template-columns:430px 1fr}.level-card{border:1px solid var(--line);border-left:5px solid #2f80ed;border-radius:12px;padding:14px;margin:14px 0}.level-card h3{margin:0 0 8px}.level-two{border-left-color:#ef8b17}.level-three{border-left-color:#d83b45}.alert-note{margin-top:16px;padding:12px;border-radius:9px;background:#eef6fb;color:#49647b}

/* TV dashboard */
.tv-body{background:#07131f;color:#fff;overflow:hidden}.tv-shell{height:100vh;padding:18px;display:flex;flex-direction:column;gap:14px}.tv-header{background:linear-gradient(110deg,#0d3553,#146c94 62%,#19a7ce);border-radius:18px;padding:20px 26px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 12px 38px rgba(0,0,0,.3)}.tv-header h1{font-size:30px;margin:4px 0}.tv-header p{margin:0;color:#d8edf7}.tv-clock-area{text-align:right}.tv-clock{font-size:22px;font-weight:700;margin-bottom:8px}.tv-fullscreen{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.25)}.tv-summary{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.tv-summary>div{background:#102436;border:1px solid #263d50;border-radius:14px;padding:12px 18px;display:flex;justify-content:space-between;align-items:center}.tv-summary span{color:#9bb1c6;text-transform:uppercase;font-size:12px}.tv-summary strong{font-size:28px}.tv-summary .alarm-summary{border-color:#d83b45}.tv-viewport{flex:1;overflow:hidden}.tv-device-grid{display:grid;grid-template-columns:repeat(4,minmax(280px,1fr));gap:14px;padding-bottom:20px}.tv-device-card{background:#102436;border:1px solid #284155;border-top:5px solid #1fb675;border-radius:16px;padding:16px;min-height:220px;box-shadow:0 8px 24px rgba(0,0,0,.25)}.tv-device-card.offline{border-top-color:#7d8b99;opacity:.78}.tv-device-card.alarm{border-top-color:#ff3344;animation:tvAlarmBlink 1s infinite}.tv-device-head{display:flex;justify-content:space-between;gap:12px}.tv-device-head h2{margin:0;font-size:19px}.tv-device-head p{margin:4px 0;color:#9bb1c6}.tv-status{padding:5px 9px;border-radius:999px;background:#163e30;color:#67e5a8;font-size:11px;height:fit-content}.alarm .tv-status{background:#5c1720;color:#ff9ca5}.offline .tv-status{background:#344351;color:#d4dde5}.tv-readings{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:18px 0}.tv-readings>div{background:#0a1b29;border-radius:12px;padding:13px;text-align:center}.tv-readings span{display:block;color:#93a8ba;font-size:11px;text-transform:uppercase}.tv-readings strong{font-size:38px}.tv-readings small{font-size:14px;margin-left:3px}.tv-card-footer,.tv-signal{display:flex;justify-content:space-between;color:#9bb1c6;font-size:11px;border-top:1px solid #263d50;padding-top:9px}.tv-signal{margin-top:8px}.alarm .tv-readings>div{background:#36131a}@keyframes tvAlarmBlink{0%,100%{box-shadow:0 0 0 rgba(255,51,68,0)}50%{box-shadow:0 0 38px rgba(255,51,68,.75);background:#43131b}}@media(max-width:1200px){.tv-device-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:850px){.tv-device-grid{grid-template-columns:repeat(2,1fr)}.tv-summary{grid-template-columns:repeat(3,1fr)}}