:root{--bg: #f4f6fb;--panel: #ffffff;--text: #1e293b;--muted: #64748b;--border: #e2e8f0;--primary: #2563eb;--primary-dark: #1d4ed8;--success: #16a34a;--danger: #dc2626;--warning: #f59e0b;--sidebar: #0f172a;--sidebar-hover: #1e293b;--radius: 12px;--shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 1px 2px rgba(15, 23, 42, .04);font-family:Segoe UI,Tahoma,Noto Sans Arabic,system-ui,-apple-system,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-size:14px}a{color:inherit;text-decoration:none}h1,h2,h3{margin:0 0 4px}h2{font-size:22px}h3{font-size:16px}small{font-size:12px}.muted{color:var(--muted)}.small{font-size:12px}.layout{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--sidebar);color:#cbd5e1;display:flex;flex-direction:column;padding:20px 14px;position:sticky;top:0;height:100vh}.brand{display:flex;align-items:center;gap:10px;padding:6px 10px 20px;color:#fff}.brand-icon{font-size:26px}.brand small{display:block;color:#94a3b8;font-size:11px;text-transform:uppercase;letter-spacing:.06em}.sidebar nav{display:flex;flex-direction:column;gap:4px;flex:1}.nav-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;color:#cbd5e1;font-weight:500;transition:background .15s,color .15s}.nav-item:hover{background:var(--sidebar-hover);color:#fff}.nav-item.active{background:var(--primary);color:#fff}.logout{margin-top:auto}.main{flex:1;display:flex;flex-direction:column;min-width:0}.topbar{height:64px;background:var(--panel);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:5}.user-chip{display:flex;align-items:center;gap:10px}.user-chip small{display:block;color:var(--muted)}.avatar{width:38px;height:38px;border-radius:50%;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:600}.content{padding:24px}.page{display:flex;flex-direction:column;gap:18px}.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap}.back-link{color:var(--primary);font-size:13px;display:inline-block;margin-bottom:6px}.grid{display:grid;gap:18px}.grid.two{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}.grid.cards{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(170px,1fr))}.metrics-row{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:12px}.stat-card{background:var(--panel);border:1px solid var(--border);border-top:3px solid var(--primary);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column;gap:4px;box-shadow:var(--shadow)}.stat-label{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.04em}.stat-value{font-size:26px;font-weight:700}.stat-hint{color:var(--muted);font-size:12px}.device-card{color:inherit;transition:transform .12s,box-shadow .12s}.device-card:hover{transform:translateY(-2px);box-shadow:0 8px 20px #0f172a1a}.device-card-head{display:flex;justify-content:space-between;align-items:flex-start;gap:8px}.device-card-head h3{margin:0}.device-metrics{display:flex;justify-content:space-between;gap:8px}.device-metrics>div{display:flex;flex-direction:column}.metric-label{color:var(--muted);font-size:11px;text-transform:uppercase}.metric-value{font-weight:600;font-size:15px}.metric-big{font-size:26px;font-weight:700}.metric-mid{font-size:15px;font-weight:600}.btn{background:#f1f5f9;border:1px solid var(--border);color:var(--text);padding:9px 15px;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:background .15s,border .15s}.btn:hover{background:#e2e8f0}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn.primary:hover{background:var(--primary-dark)}.btn.full{width:100%}.link-btn{background:none;border:none;color:var(--primary);cursor:pointer;padding:0 6px;font-size:13px}.link-btn.danger{color:var(--danger)}.icon-btn{background:none;border:none;cursor:pointer;font-size:16px;color:var(--muted)}.row-actions{display:flex;gap:4px;align-items:center}label{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:500;color:#334155}input,select{padding:9px 11px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;background:#fff;width:100%}input:focus,select:focus{outline:2px solid rgba(37,99,235,.25);border-color:var(--primary)}input:disabled{background:#f8fafc;color:var(--muted)}.stack{display:flex;flex-direction:column;gap:14px}.filters{flex-direction:row;flex-wrap:wrap;align-items:flex-end;gap:14px}.filters label,.input-select{min-width:180px}.table{width:100%;border-collapse:collapse}.table th,.table td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--border);vertical-align:middle}.table th{font-size:12px;text-transform:uppercase;color:var(--muted);letter-spacing:.04em}.table tbody tr:hover{background:#f8fafc}.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;background:#f1f5f9;color:#475569}.badge-success{background:#dcfce7;color:#15803d}.badge-danger{background:#fee2e2;color:#b91c1c}.badge-warning{background:#fef3c7;color:#b45309}.badge-muted{background:#f1f5f9;color:#64748b}.relay-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;font-size:12px;font-weight:600;line-height:1;white-space:nowrap}.relay-dot{width:7px;height:7px;border-radius:50%;background:currentColor}.relay-on{background:#dcfce7;color:#15803d;box-shadow:inset 0 0 0 1px #bbf7d0}.relay-on .relay-dot{animation:relay-pulse 1.6s ease-in-out infinite}.relay-off{background:#f1f5f9;color:#64748b;box-shadow:inset 0 0 0 1px #e2e8f0}@keyframes relay-pulse{0%,to{opacity:1}50%{opacity:.35}}.alert{padding:10px 14px;border-radius:8px;font-size:13px}.alert.error{background:#fee2e2;color:#b91c1c}.alert.success{background:#dcfce7;color:#15803d}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a80;display:grid;place-items:center;z-index:50;padding:20px}.modal{background:#fff;border-radius:var(--radius);width:100%;max-width:460px;max-height:90vh;overflow-y:auto;box-shadow:0 20px 40px #0f172a40}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--border)}.modal-body{padding:18px}.setpoint-control{display:flex;align-items:center;justify-content:center;gap:16px;margin:8px 0}.setpoint-value{font-size:34px;font-weight:700;min-width:110px;text-align:center}.pagination{display:flex;align-items:center;justify-content:center;gap:16px;padding-top:12px;color:var(--muted);font-size:13px}.empty-state{padding:40px;text-align:center;color:var(--muted);background:var(--panel);border:1px dashed var(--border);border-radius:var(--radius)}.spinner{width:32px;height:32px;margin:40px auto;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.page-loading{padding:60px;text-align:center;color:var(--muted)}.login-page{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#0f172a,#1e3a8a);padding:20px}.login-card{background:#fff;padding:34px;border-radius:16px;width:100%;max-width:380px;display:flex;flex-direction:column;gap:14px;box-shadow:0 24px 48px #0000004d}.login-logo{font-size:40px;text-align:center}.login-card h1{text-align:center;margin:0}.login-sub{text-align:center;color:var(--muted);margin:0 0 10px;font-size:13px}.login-hint{text-align:center;font-size:12px;color:var(--muted)}.login-card code{background:#f1f5f9;padding:2px 6px;border-radius:4px}@media (max-width: 760px){.sidebar{width:64px;padding:16px 8px}.brand div{display:none}.nav-item{justify-content:center;font-size:0;gap:0}.nav-item span{font-size:20px}.logout{font-size:0}.logout:after{content:"⎋";font-size:18px}.content{padding:16px}}.lang-switch{display:inline-flex;border:1px solid var(--border);border-radius:8px;overflow:hidden;background:#fff}.lang-switch button{border:none;background:transparent;padding:6px 12px;cursor:pointer;font-size:13px;font-weight:600;color:var(--muted);font-family:inherit}.lang-switch button.active{background:var(--primary);color:#fff}.login-lang{position:fixed;top:20px;inset-inline-end:20px;z-index:10}[dir=rtl] th,[dir=rtl] td,[dir=rtl] input,[dir=rtl] select{text-align:right}[dir=rtl] .back-link{display:inline-block}[dir=rtl] .lang-switch button{font-family:Segoe UI,Tahoma,Noto Sans Arabic,sans-serif}