:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #172033;
  --muted: #687385;
  --border: #e5e9f2;
  --primary: #7a1f2b;
  --primary-dark: #5e1620;
  --success: #168a4a;
  --warning: #b7791f;
  --danger: #c53030;
  --info: #2463eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 240px;
  padding: 24px 18px;
  background: #111827;
  color: #fff;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 12px;
  background: var(--primary);
  font-weight: 800;
}

.brand small {
  display: block;
  margin-top: 4px;
  color: #9ca3af;
}

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

.nav a {
  padding: 12px 14px;
  border-radius: 10px;
  color: #cbd5e1;
}

.nav a.active {
  background: rgba(122, 31, 43, 0.35);
  color: #fff;
}

.nav a.disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.main {
  margin-left: 240px;
  padding: 32px;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 8px;
  font-size: 30px;
}

.muted {
  margin: 0;
  color: var(--muted);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.stat-card,
.panel {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: 0 14px 35px rgba(15, 23, 42, 0.05);
}

.stat-card {
  padding: 20px;
}

.stat-card span {
  color: var(--muted);
  font-size: 14px;
}

.stat-card strong {
  display: block;
  margin-top: 10px;
  font-size: 30px;
}

.stat-card.success strong {
  color: var(--success);
}

.stat-card.warning strong {
  color: var(--warning);
}

.stat-card.danger strong {
  color: var(--danger);
}

.panel {
  padding: 20px;
}

.toolbar {
  display: grid;
  grid-template-columns: 1.5fr 180px 180px auto auto;
  gap: 12px;
  margin-bottom: 18px;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 12px;
  background: #fff;
  color: var(--text);
  font: inherit;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(122, 31, 43, 0.12);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0 16px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font: inherit;
  white-space: nowrap;
}

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

.button.primary:hover {
  background: var(--primary-dark);
}

.button.ghost {
  background: #f8fafc;
}

.button.small {
  min-height: 34px;
  padding: 0 10px;
  font-size: 13px;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.table-wrap {
  overflow-x: auto;
}

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

th,
td {
  border-bottom: 1px solid var(--border);
  padding: 14px 12px;
  text-align: left;
  vertical-align: middle;
}

th {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

tbody tr:hover {
  background: #fafafa;
}

.table-note {
  display: block;
  margin-top: 5px;
  color: var(--muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 12px;
  font-weight: 700;
}

.status-active,
.online-online {
  background: #e8f7ee;
  color: var(--success);
}

.status-maintenance,
.online-unknown {
  background: #fff7e6;
  color: var(--warning);
}

.status-disabled,
.status-retired,
.online-offline {
  background: #fdecec;
  color: var(--danger);
}

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

.actions form {
  margin: 0;
}

.empty {
  padding: 36px 12px;
  color: var(--muted);
  text-align: center;
}

.form-panel {
  max-width: 980px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

label span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

label.full {
  display: block;
  margin-top: 18px;
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 22px;
}

.flash-list {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.flash {
  border-radius: 12px;
  padding: 12px 14px;
  background: #eef2ff;
  color: var(--info);
}

.flash.success {
  background: #e8f7ee;
  color: var(--success);
}

.flash.error {
  background: #fdecec;
  color: var(--danger);
}

@media (max-width: 1100px) {
  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .toolbar {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 760px) {
  .sidebar {
    position: static;
    width: auto;
  }

  .main {
    margin-left: 0;
    padding: 20px;
  }

  .page-header,
  .form-grid {
    display: block;
  }

  .page-header .button,
  .form-grid label {
    margin-top: 14px;
  }

  .stats-grid,
  .toolbar {
    grid-template-columns: 1fr;
  }
}