:root {
  --bg: #F5F6F3;
  --surface: #FFFFFF;
  --surface-sunken: #EEF0EB;
  --border: #DCDFD7;
  --border-strong: #C2C7BB;
  --text-primary: #1B2320;
  --text-secondary: #5B6459;
  --text-muted: #8C9385;
  --accent: #29553F;
  --accent-light: #E4EDE7;
  --accent-text: #1D3F2E;
  --warning: #B4700F;
  --warning-bg: #FBF0DC;
  --warning-border: #E8C687;
  --critical: #A32B22;
  --critical-bg: #FBE7E4;
  --critical-border: #E9AA9F;
  --success: #2E7D4F;
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
  --radius: 8px;
  --radius-lg: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

/* Top bar */
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
}
.topbar-brand .mark {
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
}
.topbar-nav {
  display: flex;
  gap: 4px;
  font-size: 13px;
}
.topbar-nav a {
  padding: 7px 12px;
  border-radius: 6px;
  color: var(--text-secondary);
}
.topbar-nav a.active {
  background: var(--accent-light);
  color: var(--accent-text);
  font-weight: 600;
}
.topbar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
}
.avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--surface-sunken);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
}

.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px;
}

/* Header / customer info card */
.customer-header {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
}
.customer-header h1 {
  font-size: 17px;
  font-weight: 600;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}
.customer-header .meta {
  font-size: 13px;
  color: var(--text-secondary);
}
.metric-row { display: flex; gap: 28px; }
.metric { text-align: right; }
.metric .label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 3px;
}
.metric .value { font-size: 21px; font-weight: 600; }
.metric .value.danger { color: var(--critical); }

/* Toolbar */
.toolbar {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.toolbar select, .toolbar input[type="text"] {
  font-family: var(--font-ui);
  font-size: 13px;
  padding: 7px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-primary);
}
.toolbar .spacer { flex: 1; }
.btn {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: 6px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text-primary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn:hover { background: var(--surface-sunken); }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: #204431; }
.btn-sm { padding: 4px 10px; font-size: 12px; }

/* Table */
.table-wrap {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  overflow: auto;
}
table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
thead th {
  position: sticky;
  top: 0;
  background: var(--surface-sunken);
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
  border-bottom: 1px solid var(--border);
  cursor: default;
}
tbody tr {
  border-top: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.1s ease;
}
tbody tr:hover { background: var(--surface-sunken); }
tbody tr.critical { background: var(--critical-bg); }
tbody tr.critical:hover { background: #f6d9d4; }
tbody tr.warning { background: var(--warning-bg); }
tbody tr.warning:hover { background: #f7e6c4; }
td { padding: 9px 12px; white-space: nowrap; }
.mono { font-family: var(--font-mono); font-size: 12px; }
.muted { color: var(--text-muted); }
.dim { color: var(--text-secondary); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
}
.badge.critical { background: var(--critical); color: #fff; }
.badge.warning { background: var(--warning); color: #fff; }
.badge.ok { background: var(--accent-light); color: var(--accent-text); }
.badge.cleared { background: var(--surface-sunken); color: var(--text-muted); }

.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  display: inline-block;
}
.status-dot.online { background: var(--success); }
.status-dot.offline { background: var(--text-muted); }

.sort-input {
  width: 44px;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 3px 5px;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  text-align: center;
  background: var(--surface);
  color: var(--text-primary);
}

/* Cards / detail page */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 20px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 20px; }
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.stat-card .label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 4px; }
.stat-card .value { font-size: 20px; font-weight: 600; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  margin-bottom: 20px;
}
.panel h2 { font-size: 14px; font-weight: 600; margin: 0 0 14px; }
.panel table td { padding: 6px 0; font-size: 13px; }
.panel table td:first-child { color: var(--text-secondary); width: 45%; }
.panel table td:last-child { text-align: right; }

.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 20px;
}
.detail-header .back-link {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-bottom: 6px;
  display: block;
}
.detail-header h1 { font-size: 19px; font-weight: 600; margin: 0; }
.detail-header .sub { font-size: 13px; color: var(--text-secondary); margin-top: 3px; }
.alarm-flag {
  border-radius: var(--radius);
  padding: 10px 16px;
  text-align: right;
}
.alarm-flag.critical { background: var(--critical-bg); }
.alarm-flag .title { font-size: 12px; font-weight: 700; color: var(--critical); margin-bottom: 2px; }
.alarm-flag .duration { font-size: 12.5px; color: var(--critical); }

/* Form */
.form-section { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 20px 22px; margin-bottom: 14px; }
.form-section h2 { font-size: 14px; font-weight: 600; margin: 0 0 14px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-grid.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.form-grid.cols-4 { grid-template-columns: 1fr 1fr 1fr 1fr; }
.field label { display: block; font-size: 12px; color: var(--text-secondary); margin-bottom: 5px; font-weight: 500; }
.field input, .field select {
  width: 100%;
  font-family: var(--font-ui);
  font-size: 13.5px;
  padding: 8px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-primary);
}
.field.warning label { color: var(--warning); }
.field.critical label { color: var(--critical); }
.field input:focus, .field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}
.checkbox-row { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-secondary); margin-top: 4px; }
.checkbox-row input { width: auto; }

.copy-banner {
  background: var(--accent-light);
  border: 1px solid #B9D0C1;
  border-radius: var(--radius);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.copy-banner .label { font-size: 13px; color: var(--accent-text); font-weight: 500; }
.copy-banner select { width: auto; min-width: 220px; }
.copy-note {
  font-size: 12px;
  color: var(--warning);
  margin-top: 6px;
  display: none;
}

.form-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 4px; }

.empty-note { padding: 40px; text-align: center; color: var(--text-muted); font-size: 13px; }

@media (max-width: 720px) {
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .grid-2, .form-grid, .form-grid.cols-3, .form-grid.cols-4 { grid-template-columns: 1fr; }
  .topbar-nav { display: none; }
}