:root {
  --bg: #0f1117;
  --bg2: #1a1d27;
  --bg3: #242836;
  --border: #2d3147;
  --text: #e2e8f0;
  --text2: #94a3b8;
  --accent: #3b82f6;
  --ok: #22c55e;
  --warn: #f59e0b;
  --crit: #ef4444;
  --overdue: #f97316;
  --nodata: #64748b;
  --radius: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 24px;
  height: 52px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-brand { font-weight: 700; font-size: 15px; color: var(--text); flex-shrink: 0; }
.nav-links { display: flex; gap: 4px; flex: 1; }
.nav-link {
  padding: 6px 12px;
  border-radius: var(--radius);
  color: var(--text2);
  font-size: 13px;
  font-weight: 500;
  transition: background 0.15s;
}
.nav-link:hover, .nav-link.active { background: var(--bg3); color: var(--text); text-decoration: none; }
.nav-actions { flex-shrink: 0; }

/* Page header */
.page-header {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
}
.page-header h1 { font-size: 18px; font-weight: 600; }
.page-header .meta { color: var(--text2); font-size: 13px; margin-top: 4px; display: flex; gap: 16px; flex-wrap: wrap; }
.page-header .meta span { display: flex; align-items: center; gap: 4px; }

/* Search + filters */
.toolbar {
  padding: 12px 24px;
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.search-input {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 7px 12px;
  font-size: 13px;
  width: 260px;
  outline: none;
}
.search-input:focus { border-color: var(--accent); }
.filter-btn {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text2);
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.filter-btn.active, .filter-btn:hover { border-color: var(--accent); color: var(--text); }

/* Buttons */
.btn {
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.85; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text2);
}
.btn-ghost:hover { background: var(--bg3); color: var(--text); }

/* Customer grid */
.customer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
  padding: 16px 24px;
}

.customer-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.1s;
  position: relative;
}
.customer-card:hover { border-color: var(--accent); transform: translateY(-1px); }
.customer-card.inactive { opacity: 0.6; background: var(--bg); }

.card-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; margin-bottom: 6px; }
.card-name { font-weight: 600; font-size: 14px; flex: 1; min-width: 0; }
.card-name small { display: block; font-weight: 400; color: var(--text2); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Status badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}
.badge-ok { background: color-mix(in srgb, var(--ok) 15%, transparent); color: var(--ok); }
.badge-warning { background: color-mix(in srgb, var(--warn) 15%, transparent); color: var(--warn); }
.badge-critical { background: color-mix(in srgb, var(--crit) 15%, transparent); color: var(--crit); }
.badge-overdue { background: color-mix(in srgb, var(--overdue) 15%, transparent); color: var(--overdue); }
.badge-no-data { background: color-mix(in srgb, var(--nodata) 15%, transparent); color: var(--nodata); }
.badge-provisional { background: color-mix(in srgb, var(--accent) 15%, transparent); color: var(--accent); }
.badge-inactive { background: color-mix(in srgb, var(--nodata) 15%, transparent); color: var(--nodata); }
.badge-work-order { background: color-mix(in srgb, #a855f7 15%, transparent); color: #a855f7; }
.badge-pool { background: color-mix(in srgb, #06b6d4 15%, transparent); color: #06b6d4; }
.badge-spa { background: color-mix(in srgb, #ec4899 15%, transparent); color: #ec4899; }
.badge-pool-spa { background: color-mix(in srgb, #8b5cf6 15%, transparent); color: #8b5cf6; }

.card-meta { color: var(--text2); font-size: 12px; margin-top: 4px; }
.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text2);
}
.days-since.overdue { color: var(--crit); font-weight: 600; }

/* Detail page */
.detail-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 20px;
  padding: 20px 24px;
  align-items: start;
}
@media (max-width: 768px) { .detail-layout { grid-template-columns: 1fr; } }

.detail-sidebar {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.detail-sidebar h3 { font-size: 13px; font-weight: 600; color: var(--text2); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 12px; }
.detail-field { margin-bottom: 10px; }
.detail-field label { display: block; font-size: 11px; color: var(--text2); margin-bottom: 2px; }
.detail-field span { font-size: 13px; }

.banner-inactive {
  background: color-mix(in srgb, var(--nodata) 20%, transparent);
  border: 1px solid var(--nodata);
  border-radius: var(--radius);
  padding: 10px 16px;
  color: var(--text2);
  font-size: 13px;
  margin-bottom: 16px;
  font-weight: 600;
}

/* Timeline */
.timeline { display: flex; flex-direction: column; gap: 12px; }
.visit-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
.visit-card.work-order-card { border-left: 3px solid #a855f7; }
.visit-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.visit-date { font-weight: 600; }
.visit-tech { color: var(--text2); font-size: 12px; }
.visit-badges { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }
.work-performed { font-size: 13px; color: var(--text); font-style: italic; }

.chem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 8px;
  margin-top: 10px;
}
.chem-item { background: var(--bg3); border-radius: 6px; padding: 8px; }
.chem-label { font-size: 10px; color: var(--text2); text-transform: uppercase; letter-spacing: 0.05em; }
.chem-value { font-size: 16px; font-weight: 700; margin-top: 2px; }
.chem-value.out-of-range { color: var(--crit); }

/* Charts */
.chart-container { position: relative; height: 200px; margin-top: 8px; }
.chart-tabs { display: flex; gap: 4px; margin-bottom: 8px; }
.chart-tab { background: var(--bg3); border: 1px solid var(--border); border-radius: 6px; color: var(--text2); padding: 4px 10px; font-size: 12px; cursor: pointer; }
.chart-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.chart-section { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; margin-bottom: 12px; }
.chart-section h4 { font-size: 13px; font-weight: 600; margin-bottom: 8px; }
.no-data { color: var(--text2); font-size: 13px; padding: 20px 0; text-align: center; }

/* Alerts */
.alert-section { padding: 12px 24px; }
.alert-section h2 { font-size: 15px; font-weight: 700; margin-bottom: 10px; }
.alert-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}
.alert-card:hover { border-color: var(--accent); }
.alert-card.critical { border-left: 3px solid var(--crit); }
.alert-card.warning { border-left: 3px solid var(--warn); }
.alert-card.overdue { border-left: 3px solid var(--overdue); }
.alert-params { font-size: 12px; color: var(--text2); margin-top: 4px; }

/* Empty state */
.empty { text-align: center; padding: 60px 24px; color: var(--text2); }
.empty h3 { font-size: 16px; margin-bottom: 8px; color: var(--text); }

/* Loading */
.loading { text-align: center; padding: 40px; color: var(--text2); }

/* Date picker */
.date-range { display: flex; gap: 8px; align-items: center; font-size: 13px; color: var(--text2); }
.date-input {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 5px 10px;
  font-size: 13px;
}
.date-input:focus { outline: none; border-color: var(--accent); }

/* Pagination */
.pagination { display: flex; gap: 8px; padding: 16px 24px; justify-content: center; }

/* Tables */
.table-wrap { padding: 0 24px 24px; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
th { font-size: 11px; font-weight: 600; color: var(--text2); text-transform: uppercase; letter-spacing: 0.05em; }
tr:hover td { background: var(--bg3); }