:root {
  --bg: #f6f7f9;
  --bg-grid: #eef0f4;
  --surface: #ffffff;
  --surface-2: #f9fafb;
  --ink: #0b1220;
  --ink-soft: #1f2937;
  --muted: #6b7280;
  --muted-2: #9ca3af;
  --line: #e5e7eb;
  --line-2: #eef1f5;
  --accent: #4f46e5;
  --accent-2: #6366f1;
  --accent-soft: #eef2ff;
  --success: #16a34a;
  --success-soft: #dcfce7;
  --warn: #d97706;
  --warn-soft: #fef3c7;
  --danger: #dc2626;
  --danger-soft: #fee2e2;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .04), 0 1px 1px rgba(15, 23, 42, .03);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, .06), 0 1px 3px rgba(15, 23, 42, .04);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, .08), 0 4px 12px rgba(15, 23, 42, .04);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 100% -200px, rgba(99, 102, 241, .07), transparent 60%),
    radial-gradient(800px 400px at -200px 100%, rgba(79, 70, 229, .05), transparent 60%),
    var(--bg);
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-feature-settings: 'cv11', 'ss01', 'ss03';
  -webkit-font-smoothing: antialiased;
  font-size: 14px;
  line-height: 1.5;
}

button, input, select, table { font: inherit; color: inherit; }
code, .mono { font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .85em; }

.shell {
  display: grid;
  grid-template-columns: 248px 1fr;
  min-height: 100vh;
}

/* ===== Sidebar ===== */

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 22px 16px;
  border-right: 1px solid var(--line);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.brand {
  display: flex;
  gap: 11px;
  align-items: center;
  padding: 4px 6px 14px;
  border-bottom: 1px solid var(--line-2);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255,255,255,.18);
}
.brand-mark svg { width: 18px; height: 18px; }

.brand-text strong { display: block; font-size: 14px; font-weight: 700; letter-spacing: -.01em; }
.brand-text span { display: block; font-size: 11px; color: var(--muted); letter-spacing: .04em; text-transform: uppercase; }

.eyebrow { color: var(--muted); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; font-weight: 600; }

.nav { display: grid; gap: 2px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--muted);
  background: transparent;
  text-align: left;
  cursor: pointer;
  font-weight: 500;
  font-size: 13.5px;
  transition: color .12s, background .12s;
}
.nav-item svg { width: 16px; height: 16px; flex-shrink: 0; }
.nav-item:hover { color: var(--ink); background: var(--surface-2); }
.nav-item.is-active {
  color: var(--accent);
  background: var(--accent-soft);
  font-weight: 600;
}

.sidebar-card {
  margin-top: auto;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
}
.sidebar-card strong { display: block; font-size: 13px; font-weight: 600; }
.sidebar-card p { margin: 2px 0 0; font-size: 11.5px; color: var(--muted); line-height: 1.45; }
.status-dot {
  margin-top: 5px;
  width: 8px; height: 8px;
  border-radius: 999px;
  background: var(--muted-2);
  box-shadow: 0 0 0 3px rgba(156,163,175,.18);
  flex-shrink: 0;
}
.status-dot.is-live { background: var(--success); box-shadow: 0 0 0 3px rgba(22,163,74,.18); }
.status-dot.is-fallback { background: var(--warn); box-shadow: 0 0 0 3px rgba(217,119,6,.18); }

/* ===== Main ===== */

.main { padding: 28px 32px 48px; min-width: 0; }

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-end;
  margin-bottom: 22px;
}

h1, h2 { margin: 0; }
h1 {
  margin-top: 4px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--ink);
}
h2 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -.005em;
  color: var(--ink);
}

.top-actions { display: flex; gap: 8px; align-items: center; }

.primary-button, .ghost-button, .small-button, .icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: 9px;
  padding: 8px 13px;
  cursor: pointer;
  font-weight: 500;
  font-size: 13px;
  transition: background .12s, border-color .12s, transform .06s, box-shadow .12s;
  border: 1px solid transparent;
  white-space: nowrap;
}
.primary-button {
  color: white;
  background: var(--ink);
  border-color: var(--ink);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}
.primary-button:hover { background: #1f2937; }
.primary-button:active { transform: translateY(1px); }
.ghost-button {
  color: var(--ink);
  background: var(--surface);
  border-color: var(--line);
}
.ghost-button:hover { background: var(--surface-2); border-color: #d1d5db; }
.small-button { padding: 6px 10px; font-size: 12px; }
.icon-button {
  padding: 6px;
  width: 30px; height: 30px;
  background: var(--surface);
  border-color: var(--line);
  color: var(--muted);
}
.icon-button:hover { color: var(--ink); background: var(--surface-2); }
.icon-button svg { width: 14px; height: 14px; }
.primary-button svg, .ghost-button svg { width: 14px; height: 14px; }
.full { width: 100%; margin-top: 8px; padding: 10px 13px; }

.sync-pill {
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
}
.sync-pill.is-live { color: var(--success); border-color: var(--success-soft); background: var(--success-soft); }
.sync-pill.is-fallback { color: var(--warn); border-color: var(--warn-soft); background: var(--warn-soft); }

/* ===== Views & panels ===== */

.view { display: none; animation: enter .18s ease both; }
.view.is-visible { display: block; }
@keyframes enter { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

.panel {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  margin-bottom: 14px;
}
.panel-sub { color: var(--muted); font-size: 12px; font-weight: 500; }

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.metric {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}
.metric span { color: var(--muted); font-size: 12px; font-weight: 500; }
.metric strong {
  display: block;
  margin-top: 6px;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--ink);
}

.two-col {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 14px;
}

.setup-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.setup-grid .checklist-panel { grid-column: 1 / -1; }

/* ===== Flow diagram ===== */
.flow {
  display: flex;
  align-items: stretch;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 4px;
}
.flow-step {
  flex: 1 1 0;
  min-width: 110px;
  padding: 12px 12px;
  border-radius: var(--radius);
  background: var(--surface-2);
  border: 1px solid var(--line);
  display: grid;
  gap: 4px;
  align-content: center;
}
.flow-step strong { font-size: 13px; font-weight: 600; }
.flow-step em { font-style: normal; font-size: 11.5px; color: var(--muted); }
.flow-step-num {
  display: inline-grid;
  place-items: center;
  width: 20px; height: 20px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
}
.flow-arrow {
  align-self: center;
  color: var(--muted-2);
  font-weight: 700;
  padding: 0 2px;
}

.danger-soft {
  background: linear-gradient(180deg, #fff7ed 0%, #fffaf3 100%);
  border-color: #fed7aa;
}
.check-list { color: var(--ink-soft); line-height: 1.7; padding-left: 18px; margin: 0; font-size: 13px; }
.check-list li { margin: 4px 0; }
code {
  background: var(--surface-2);
  color: var(--ink-soft);
  padding: 1px 6px;
  border-radius: 6px;
  border: 1px solid var(--line);
}
.danger-soft code { background: #fff; border-color: #fed7aa; color: #9a3412; }

/* ===== Tables ===== */
.table-wrap { overflow-x: auto; margin: -4px -4px; padding: 4px; }
table { width: 100%; border-collapse: collapse; }
th, td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--line-2);
  text-align: left;
  font-size: 13px;
  white-space: nowrap;
}
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--surface-2); }
th {
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 600;
  background: var(--surface-2);
  border-bottom: 1px solid var(--line);
}
th:first-child { border-top-left-radius: var(--radius-sm); }
th:last-child { border-top-right-radius: var(--radius-sm); }
td { color: var(--ink-soft); }

/* ===== Badges ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 600;
  border: 1px solid transparent;
}
.badge::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 999px;
  background: currentColor;
}
.badge.ok { color: var(--success); background: var(--success-soft); border-color: rgba(22,163,74,.18); }
.badge.warn { color: var(--warn); background: var(--warn-soft); border-color: rgba(217,119,6,.18); }
.badge.dead { color: var(--danger); background: var(--danger-soft); border-color: rgba(220,38,38,.18); }

/* ===== Device cards ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}
.device-card {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.device-card strong { display: block; margin-bottom: 4px; font-size: 14px; font-weight: 600; }
.device-card p { color: var(--muted); margin: 4px 0; font-size: 12.5px; }

/* ===== Forms ===== */
.form-grid { display: block; }
label {
  display: block;
  margin: 10px 0 5px;
  color: var(--ink-soft);
  font-size: 12.5px;
  font-weight: 500;
}
input, select, .form-control {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface);
  color: var(--ink);
  font-size: 13.5px;
  transition: border-color .12s, box-shadow .12s;
}
input:focus, select:focus, .form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79,70,229,.12);
}
select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 32px; }

.form-hint { margin: 6px 2px 0; font-size: 11.5px; color: var(--muted); }

/* ===== Pairing ===== */
.pairing-panel { align-self: start; }

.pairing-result { min-height: 360px; display: flex; flex-direction: column; }
.pairing-result[data-state="empty"] .pairing-empty { display: flex; }
.pairing-result[data-state="ready"] .pairing-empty { display: none; }

.pairing-empty {
  flex: 1;
  display: none;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--muted);
  padding: 24px;
  border: 1.5px dashed var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
}
.pairing-empty p { margin: 0; font-size: 13px; }
.pairing-empty-icon {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--muted-2);
}
.pairing-empty-icon svg { width: 22px; height: 22px; }

.pairing-content { display: grid; gap: 14px; }

.qr-wrap {
  display: grid;
  place-items: center;
  gap: 10px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
}
.qr-canvas {
  width: 220px; height: 220px;
  background: white;
  padding: 10px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
}
.qr-canvas img, .qr-canvas svg { width: 100%; height: 100%; display: block; }
.qr-hint { margin: 0; font-size: 12px; color: var(--muted); }

.kv { display: grid; gap: 4px; }
.kv > span {
  font-size: 11px;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.copy-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 6px 6px 10px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface-2);
}
.copy-row code {
  flex: 1;
  background: transparent;
  border: 0;
  padding: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 12.5px;
  color: var(--ink-soft);
}

.raw-payload summary {
  cursor: pointer;
  font-size: 12.5px;
  color: var(--muted);
  font-weight: 500;
  padding: 4px 0;
  user-select: none;
}
.raw-payload summary:hover { color: var(--ink); }
.raw-payload[open] summary { color: var(--ink); margin-bottom: 8px; }

pre {
  margin: 0 0 8px;
  padding: 12px 14px;
  border-radius: var(--radius);
  background: #0b1220;
  color: #e2e8f0;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12px;
  line-height: 1.55;
  overflow: auto;
  max-height: 240px;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ===== Checklist steps ===== */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: step;
}
.steps li {
  counter-increment: step;
  position: relative;
  padding: 10px 12px 10px 42px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.5;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 10px; top: 10px;
  width: 22px; height: 22px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: var(--ink);
  color: white;
  font-size: 11.5px;
  font-weight: 700;
}
.steps li strong { color: var(--ink); font-weight: 600; }

/* ===== Toast ===== */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%) translateY(20px);
  background: var(--ink);
  color: white;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  box-shadow: var(--shadow-lg);
  transition: opacity .18s, transform .18s;
  z-index: 9999;
}
.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1100px) {
  .setup-grid { grid-template-columns: 1fr; }
  .setup-grid .checklist-panel { grid-column: auto; }
}
@media (max-width: 960px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { position: relative; height: auto; flex-direction: column; }
  .metric-grid, .two-col { grid-template-columns: 1fr; }
  .main { padding: 22px 18px 36px; }
  .topbar { align-items: flex-start; flex-direction: column; gap: 12px; }
  .flow { flex-direction: column; }
  .flow-arrow { transform: rotate(90deg); padding: 4px 0; }
}