:root {
  --bg: #0a0a0f;
  --surface: #12121a;
  --surface2: #1a1a26;
  --border: #2a2a3a;
  --text: #e8e8f0;
  --text-muted: #6b6b8a;
  --accent: #e040fb;
  --idle: #00e676;
  --alerting: #ff1744;
  --font: 'DM Sans', sans-serif;
  --mono: 'DM Mono', monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text); font-family: var(--font); display: flex; min-height: 100vh; }

.app { display: flex; width: 100%; }

/* SIDEBAR */
.sidebar {
  width: 200px; flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  padding: 24px 0;
  position: fixed; top: 0; left: 0; bottom: 0;
}
.sidebar-logo {
  font-family: var(--mono); font-size: 1.2rem; font-weight: 500;
  padding: 0 20px 24px;
  border-bottom: 1px solid var(--border);
}
.logo-nt { color: var(--accent); }
.sidebar-tag { font-size: 0.65rem; color: var(--text-muted); margin-left: 4px; vertical-align: middle; }
.sidebar-nav { flex: 1; padding: 16px 0; display: flex; flex-direction: column; gap: 2px; }
.nav-item {
  background: transparent; border: none;
  color: var(--text-muted); cursor: pointer;
  font-family: var(--font); font-size: 0.88rem;
  padding: 10px 20px; text-align: left;
  transition: all 0.15s; border-left: 3px solid transparent;
}
.nav-item:hover { color: var(--text); background: var(--surface2); }
.nav-item.active { color: var(--accent); border-left-color: var(--accent); background: rgba(224,64,251,0.08); }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 10px; }
.back-link { color: var(--text-muted); font-size: 0.82rem; text-decoration: none; }
.back-link:hover { color: var(--text); }
.logout-btn {
  background: transparent; border: 1px solid var(--border);
  border-radius: 6px; color: var(--text-muted); cursor: pointer;
  font-family: var(--font); font-size: 0.8rem; padding: 6px 12px;
}

/* MAIN */
.admin-main { margin-left: 200px; flex: 1; padding: 32px; max-width: 1000px; }

.panel { display: none; }
.panel.active { display: block; }

.panel-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.panel-header h2 { font-size: 1.4rem; font-weight: 700; }
.panel-desc { color: var(--text-muted); margin-bottom: 24px; }

.filter-row { margin-bottom: 16px; font-size: 0.88rem; color: var(--text-muted); }
.filter-row select { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; color: var(--text); font-family: var(--font); font-size: 0.88rem; margin-left: 8px; padding: 5px 10px; outline: none; cursor: pointer; }

/* FORMS */
.add-form {
  background: var(--surface2); border: 1px solid var(--border); border-radius: 10px;
  display: flex; flex-wrap: wrap; gap: 10px; padding: 16px; margin-bottom: 20px;
  align-items: center;
}
.add-form input, .add-form select {
  background: var(--bg); border: 1px solid var(--border); border-radius: 7px;
  color: var(--text); font-family: var(--font); font-size: 0.88rem;
  outline: none; padding: 9px 13px; transition: border-color 0.2s;
}
.add-form input:focus { border-color: var(--accent); }
.hidden { display: none !important; }
.form-error { color: #f87171; font-size: 0.82rem; margin-top: 4px; }

.btn-primary {
  background: var(--accent); border: none; border-radius: 7px;
  color: #fff; cursor: pointer; font-family: var(--font);
  font-size: 0.88rem; font-weight: 600; padding: 9px 18px;
  transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.85; }
.btn-ghost {
  background: transparent; border: 1px solid var(--border); border-radius: 7px;
  color: var(--text-muted); cursor: pointer; font-family: var(--font);
  font-size: 0.88rem; padding: 9px 16px;
}
.btn-ghost:hover { border-color: var(--text-muted); color: var(--text); }
.btn-danger { background: rgba(255,23,68,0.15); border: 1px solid var(--alerting); border-radius: 5px; color: var(--alerting); cursor: pointer; font-size: 0.78rem; padding: 4px 10px; font-family: var(--font); }
.btn-danger:hover { background: rgba(255,23,68,0.3); }
.btn-sm { background: transparent; border: 1px solid var(--border); border-radius: 5px; color: var(--text-muted); cursor: pointer; font-size: 0.78rem; padding: 4px 10px; font-family: var(--font); }
.btn-sm:hover { border-color: var(--accent); color: var(--accent); }

/* TABLE */
.data-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.data-table th { color: var(--text-muted); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; padding: 8px 12px; border-bottom: 1px solid var(--border); text-align: left; }
.data-table td { padding: 11px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--surface2); }

.badge { display: inline-block; border-radius: 4px; font-size: 0.72rem; font-weight: 600; padding: 2px 8px; text-transform: uppercase; letter-spacing: 0.05em; }
.badge-green { background: rgba(0,230,118,0.15); color: var(--idle); }
.badge-gray { background: rgba(107,107,138,0.2); color: var(--text-muted); }
.badge-red { background: rgba(255,23,68,0.15); color: var(--alerting); }
.badge-purple { background: rgba(224,64,251,0.15); color: var(--accent); }
.badge-blue   { background: rgba(74,158,255,0.15); color: #4a9eff; }
.mono { font-family: var(--mono); font-size: 0.82rem; }

.checkbox-row { display: flex; gap: 16px; align-items: center; font-size: 0.88rem; }
.checkbox-row label { display: flex; gap: 6px; align-items: center; cursor: pointer; }

.zones-checklist { display: flex; flex-wrap: wrap; gap: 8px; }
.zones-checklist label { background: var(--bg); border: 1px solid var(--border); border-radius: 6px; cursor: pointer; display: flex; gap: 6px; align-items: center; padding: 5px 10px; font-size: 0.82rem; transition: border-color 0.2s; }
.zones-checklist label:hover { border-color: var(--accent); }

.simulate-form { display: flex; flex-direction: column; gap: 14px; max-width: 400px; }
.simulate-form label { font-size: 0.82rem; color: var(--text-muted); }
.simulate-form input { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; color: var(--text); font-family: var(--mono); font-size: 0.9rem; outline: none; padding: 10px 14px; }
.sim-result { font-size: 0.85rem; font-family: var(--mono); }
.sim-result.ok { color: var(--idle); }
.sim-result.err { color: var(--alerting); }