:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --ink: #17202a;
  --muted: #687385;
  --panel: #ffffff;
  --line: #dbe1e8;
  --brand: #0f766e;
  --brand-2: #2563eb;
  --warn: #b45309;
  --danger: #b91c1c;
  --good: #15803d;
  --shadow: 0 12px 30px rgba(18, 31, 45, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px 1fr;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 6px;
  min-height: 36px;
  padding: 0 12px;
  cursor: pointer;
}

button:hover {
  border-color: var(--brand);
}

.sidebar {
  background: #102027;
  color: #eff6f5;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--brand);
  font-weight: 800;
  font-size: 24px;
}

.brand strong,
.brand span {
  display: block;
}

.brand span {
  color: #b8c7c5;
  font-size: 13px;
}

nav {
  display: grid;
  gap: 8px;
}

.nav {
  text-align: left;
  border: 0;
  background: transparent;
  color: #d9e5e4;
}

.nav.active,
.nav:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.token {
  margin-top: auto;
  display: grid;
  gap: 6px;
  color: #b8c7c5;
  font-size: 13px;
}

.token input {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  padding: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

main {
  min-width: 0;
  padding: 24px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 22px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 30px;
  line-height: 1.2;
}

h2 {
  font-size: 18px;
}

.topbar p,
.panel-head span,
.muted {
  color: var(--muted);
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  gap: 14px;
  margin-bottom: 16px;
}

.metric,
.panel,
.device-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.metric {
  padding: 16px;
}

.metric span {
  color: var(--muted);
  font-size: 13px;
}

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: 28px;
}

.two-col {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 16px;
}

.panel {
  padding: 16px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

select,
input {
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 9px;
  background: #fff;
  color: var(--ink);
}

.table-wrap {
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 11px 8px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  text-transform: capitalize;
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--muted);
}

.online .dot {
  background: var(--good);
}

.offline .dot {
  background: var(--danger);
}

.deactivated .dot {
  background: var(--warn);
}

.pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 3px 8px;
  font-size: 12px;
  font-weight: 700;
  background: #e9eef5;
}

.pill.active {
  color: var(--good);
  background: #dcfce7;
}

.pill.expiring,
.pill.warning {
  color: var(--warn);
  background: #fef3c7;
}

.pill.expired,
.pill.critical {
  color: var(--danger);
  background: #fee2e2;
}

.alert-list,
.audit-list {
  display: grid;
  gap: 10px;
}

.alert,
.audit {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fbfcfd;
}

.notice {
  border: 1px solid #fbbf24;
  border-radius: 8px;
  padding: 10px 12px;
  background: #fffbeb;
  color: #92400e;
  margin: 10px 0;
}

.alert strong,
.audit strong {
  display: block;
  margin-bottom: 4px;
}

.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
}

.fleet-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.action-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 14px;
  display: grid;
  gap: 12px;
  position: sticky;
  top: 16px;
}

.action-panel h3 {
  margin: 0;
  font-size: 15px;
}

.action-panel strong {
  font-size: 34px;
  line-height: 1;
}

.action-panel label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

.audio-tools {
  display: grid;
  gap: 8px;
}

.audio-tools audio {
  width: 100%;
}

.fleet-table {
  border: 1px solid var(--line);
  border-radius: 8px;
}

.device-card {
  padding: 14px;
  display: grid;
  gap: 12px;
}

.device-card header {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.device-card h3 {
  margin: 0 0 5px;
  font-size: 17px;
}

.device-meta,
.kv {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.kv div,
.device-meta div {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 9px;
  background: #fbfcfd;
  min-width: 0;
}

.kv span,
.device-meta span {
  color: var(--muted);
  display: block;
  font-size: 12px;
  margin-bottom: 4px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.actions button {
  flex: 1 1 118px;
  min-width: 0;
  padding: 0 10px;
}

.device-card .actions button {
  flex-basis: 104px;
}

dialog {
  width: min(980px, calc(100vw - 28px));
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.22);
  padding: 0;
}

dialog::backdrop {
  background: rgba(15, 23, 42, 0.4);
}

.dialog-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px;
  border-bottom: 1px solid var(--line);
}

.icon {
  width: 36px;
  padding: 0;
}

#deviceDetail,
#registerForm {
  padding: 16px;
}

.detail-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 16px;
}

.screenshot {
  min-height: 220px;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: #edf2f7;
  overflow: hidden;
}

.screenshot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.services {
  margin-top: 14px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.form-grid label {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 13px;
}

.dialog-actions {
  margin-top: 16px;
  display: flex;
  justify-content: flex-end;
}

pre {
  white-space: pre-wrap;
  overflow: auto;
  padding: 14px;
  background: #111827;
  color: #e5e7eb;
  border-radius: 8px;
  min-height: 280px;
}

.report-board {
  display: grid;
  gap: 16px;
}

.usage-filters {
  display: grid;
  grid-template-columns: repeat(7, minmax(130px, 1fr));
  gap: 10px;
  margin: 0 0 16px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
}

.usage-filters label {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.usage-filters select,
.usage-filters input {
  min-width: 0;
}

.report-metrics {
  display: grid;
  grid-template-columns: repeat(6, minmax(120px, 1fr));
  gap: 12px;
}

.report-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.report-card,
.report-section {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 12px;
}

.report-card h3,
.report-section h3 {
  margin: 0 0 10px;
  font-size: 15px;
}

.management-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(280px, 1fr));
  gap: 16px;
}

.compact-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(120px, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}

.compact-form button {
  grid-column: 1 / -1;
}

.mini-list {
  display: grid;
  gap: 8px;
  max-height: 320px;
  overflow: auto;
}

.mini-item {
  display: grid;
  gap: 3px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
}

.mini-item strong {
  color: var(--text);
}

@media (max-width: 900px) {
  body {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .metrics,
  .report-metrics,
  .usage-filters,
  .two-col,
  .detail-layout,
  .form-grid,
  .fleet-layout,
  .management-grid,
  .compact-form {
    grid-template-columns: 1fr;
  }

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