:root{--bg:#f4f7fb;--card:#fff;--text:#172033;--muted:#6b7280;--line:#e5e7eb;--primary:#0f766e;--primary-dark:#115e59;--danger:#dc2626;--success:#16a34a;--shadow:0 10px 30px rgba(15,23,42,.08)}*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}.page{width:min(1200px,100%);margin:0 auto;padding:14px}.topbar{display:flex;justify-content:space-between;gap:12px;align-items:center;background:linear-gradient(135deg,#0f766e,#134e4a);color:#fff;padding:18px;border-radius:18px;box-shadow:var(--shadow);margin-bottom:14px}.topbar h1{margin:0 0 4px;font-size:24px}.topbar p{margin:0;opacity:.9}.panel,.mini-card,.device-card{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}.panel{padding:16px;margin-bottom:14px}.panel-title h2{margin:0 0 4px;font-size:20px}.panel-title p{margin:0 0 14px;color:var(--muted)}.device-form{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;align-items:end}label{display:flex;flex-direction:column;gap:6px;color:var(--muted);font-size:13px;font-weight:600}input,select{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px;font-size:14px;outline:none;background:#fff}input:focus,select:focus{border-color:var(--primary)}button{border:none;border-radius:12px;padding:12px 14px;font-size:14px;font-weight:700;cursor:pointer;background:var(--primary);color:#fff}button:hover{background:var(--primary-dark)}button.secondary{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.32)}.status-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:14px}.mini-card{padding:14px}.mini-card span{display:block;color:var(--muted);font-size:13px;margin-bottom:4px}.mini-card strong{font-size:26px}.devices-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.device-card{overflow:hidden}.device-head{padding:16px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:12px}.device-head h3{margin:0 0 5px;font-size:20px}.device-meta{display:flex;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:13px}.badge{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:6px 10px;font-size:13px;font-weight:700;white-space:nowrap}.badge.online{background:#dcfce7;color:#166534}.badge.offline{background:#fee2e2;color:#991b1b}.relays{padding:12px;display:grid;gap:10px}.relay{border:1px solid var(--line);border-radius:16px;padding:12px;display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center}.relay h4{margin:0 0 6px;font-size:16px}.relay small{color:var(--muted);line-height:1.5;display:block}.relay-actions{display:flex;gap:8px;align-items:center}.toggle{min-width:82px}.toggle.on{background:var(--success)}.toggle.off{background:var(--danger)}.edit{background:#334155}.delete{background:#991b1b}.loading,.empty{background:#fff;border:1px dashed var(--line);border-radius:18px;padding:22px;color:var(--muted);grid-column:1/-1}.footer-actions{display:flex;gap:8px;padding:12px 16px 16px;border-top:1px solid var(--line)}@media(max-width:900px){.device-form,.devices-grid{grid-template-columns:1fr}.status-row{grid-template-columns:1fr 1fr 1fr}.topbar{align-items:flex-start;flex-direction:column}}@media(max-width:520px){.page{padding:8px}.topbar h1{font-size:20px}.status-row{grid-template-columns:1fr}.relay{grid-template-columns:1fr}.relay-actions{width:100%}.toggle,.edit{flex:1}}