:root{color-scheme:light;--bg: #f4f7fb;--surface: #ffffff;--surface-muted: #edf2f7;--border: #d7e0ea;--text: #1f2937;--text-muted: #5b6472;--accent: #174ea6;--accent-soft: #d9e6ff;--success: #0f766e;--warning: #a16207;--danger: #b42318;--radius: 10px;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}button,input,summary{font:inherit}button{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:999px;padding:.55rem .9rem;cursor:pointer}button:hover{border-color:var(--accent)}.app-shell{min-height:100vh;display:grid;grid-template-columns:320px minmax(0,1fr)}.sidebar{border-right:1px solid var(--border);background:var(--surface);padding:1rem}.content{padding:1rem 1.25rem 2rem}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1rem}.stack{display:grid;gap:1rem}.header{display:flex;justify-content:space-between;gap:1rem;align-items:flex-start;margin-bottom:1rem}.title{margin:0 0 .35rem;font-size:1.5rem}.muted{color:var(--text-muted)}.meta-row{display:flex;flex-wrap:wrap;gap:.5rem}.badge{display:inline-flex;align-items:center;gap:.35rem;padding:.25rem .55rem;border-radius:999px;font-size:.85rem;border:1px solid var(--border);background:var(--surface-muted)}.badge.fixture{background:var(--accent-soft);color:var(--accent)}.badge.success{color:var(--success)}.badge.warning{color:var(--warning)}.badge.danger{color:var(--danger)}.customer-list{display:grid;gap:.65rem}.customer-item{width:100%;text-align:left;border-radius:12px;padding:.8rem;display:grid;gap:.25rem}.customer-item.selected{border-color:var(--accent);background:var(--accent-soft)}.customer-name{font-weight:600}.section-title{margin:0 0 .75rem;font-size:1.05rem}.area{border-top:1px solid var(--border);padding-top:1rem;margin-top:1rem}.area:first-child{border-top:0;padding-top:0;margin-top:0}.gateway-grid,.device-grid{display:grid;gap:.75rem}.gateway-card,.device-card{border:1px solid var(--border);border-radius:10px;background:#fcfdff;padding:.85rem}.device-card{display:grid;gap:.55rem}.device-card header{display:flex;justify-content:space-between;gap:.75rem;align-items:flex-start}.device-title{margin:0;font-weight:600}.kv{display:flex;flex-wrap:wrap;gap:.4rem .75rem;color:var(--text-muted);font-size:.92rem}.kv strong{color:var(--text)}.empty-state{border:1px dashed var(--border);background:var(--surface);border-radius:var(--radius);padding:1rem;color:var(--text-muted)}.toolbar{display:flex;justify-content:space-between;gap:1rem;align-items:center;flex-wrap:wrap;margin-bottom:1rem}.search{width:100%;border-radius:10px;border:1px solid var(--border);padding:.7rem .8rem}.payload{white-space:pre-wrap;word-break:break-word;border-radius:8px;padding:.75rem;background:#f8fafc;border:1px solid var(--border);font-size:.85rem}@media(max-width:900px){.app-shell{grid-template-columns:1fr}.sidebar{border-right:0;border-bottom:1px solid var(--border)}}