:root {
  color-scheme: light;
  --bg: #f5f7fa;
  --surface: #ffffff;
  --surface-soft: #f9fafb;
  --border: #d8dee8;
  --text: #18202c;
  --muted: #637083;
  --blue: #2456a6;
  --blue-strong: #1b4589;
  --danger: #b42318;
  --danger-strong: #8f1c14;
  --green: #087443;
  --amber: #a15c00;
  --shadow: 0 10px 28px rgba(23, 33, 49, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 "Inter", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  min-height: 38px;
  border: 1px solid transparent;
  border-radius: 7px;
  padding: 0 14px;
  cursor: pointer;
  white-space: nowrap;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

input,
select {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: #fff;
  color: var(--text);
  padding: 0 10px;
}

input:focus,
select:focus,
button:focus-visible {
  outline: 2px solid rgba(36, 86, 166, 0.28);
  outline-offset: 2px;
}

label span {
  display: block;
  margin-bottom: 6px;
  color: #344154;
  font-size: 12px;
  font-weight: 650;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: 0;
}

h2 {
  font-size: 16px;
  line-height: 1.25;
  letter-spacing: 0;
}

.hidden {
  display: none !important;
}

.muted {
  color: var(--muted);
}

.eyebrow {
  margin-bottom: 6px;
  color: var(--blue);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0;
  text-transform: uppercase;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(460px, 100%);
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 28px;
}

.form-grid {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.message {
  min-height: 20px;
  color: var(--danger);
}

.app-shell {
  min-height: 100vh;
  padding: 18px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1400px;
  margin: 0 auto 14px;
}

.session-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.session-pill {
  max-width: 340px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  color: #344154;
  padding: 7px 12px;
  font-size: 12px;
}

.layout {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 14px;
}

.workspace {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.panel {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 1px 2px rgba(23, 33, 49, 0.04);
}

.panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.inventory-panel {
  align-self: start;
}

.metrics-grid,
.status-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border-top: 1px solid var(--border);
}

.status-grid {
  grid-template-columns: repeat(4, 1fr);
  border-top: 0;
}

.metrics-grid div,
.status-grid div {
  background: var(--surface-soft);
  padding: 14px;
}

.metrics-grid span,
.status-grid span {
  display: block;
  font-size: 22px;
  font-weight: 750;
}

.metrics-grid label,
.status-grid label {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  padding: 16px;
}

.action-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 16px;
  border-top: 1px solid var(--border);
}

.primary {
  background: var(--blue);
  color: #fff;
}

.primary:hover {
  background: var(--blue-strong);
}

.secondary {
  border-color: var(--border);
  background: #fff;
  color: #344154;
}

.secondary:hover {
  border-color: #a9b5c6;
}

.compact {
  min-height: 32px;
  padding: 0 10px;
  font-size: 12px;
}

.danger {
  background: var(--danger);
  color: #fff;
}

.danger:hover {
  background: var(--danger-strong);
}

.alert {
  max-width: 1400px;
  margin: 0 auto 12px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--blue);
  border-radius: 8px;
  background: #fff;
  padding: 10px 12px;
}

.alert.error {
  border-left-color: var(--danger);
  color: var(--danger-strong);
}

.alert.success {
  border-left-color: var(--green);
  color: var(--green);
}

.target-errors {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  color: var(--amber);
  overflow-wrap: anywhere;
}

.table-wrap {
  overflow: auto;
}

table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}

th,
td {
  border-bottom: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: middle;
}

th {
  background: var(--surface-soft);
  color: #425066;
  font-size: 12px;
  font-weight: 750;
}

td {
  color: #263244;
}

.check-col {
  width: 44px;
}

td input[type="checkbox"] {
  width: 18px;
  min-height: 18px;
  accent-color: var(--blue);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  border-radius: 999px;
  padding: 0 9px;
  background: #eef3fb;
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
}

.status-pill.offline,
.status-pill.stale {
  background: #fff0ee;
  color: var(--danger);
}

.status-pill.active,
.status-pill.registered {
  background: #e9f7ef;
  color: var(--green);
}

@media (max-width: 860px) {
  .app-shell {
    padding: 12px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .session-actions {
    width: 100%;
    flex-wrap: wrap;
  }

  .session-pill {
    max-width: 100%;
    flex: 1 1 220px;
  }

  .layout,
  .controls-grid {
    grid-template-columns: 1fr;
  }

  .status-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}