:root {
  --bg: #fafbfc;
  --fg: #1a1d21;
  --muted: #6a7180;
  --border: #e1e4e8;
  --accent: #2563eb;
  --accent-light: #dbeafe;
  --good: #16a34a;
  --bad: #dc2626;
  --card-bg: #ffffff;
  --code-bg: #f3f4f6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  background: var(--bg);
  color: var(--fg);
}

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

code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 12.5px;
  background: var(--code-bg);
  padding: 1px 5px;
  border-radius: 3px;
}

/* ── Top bar ─────────────────────────────────────────────────────────────── */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand a {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--fg);
}
.brand a:hover { text-decoration: none; color: var(--accent); }

.topbar nav a {
  margin-left: 18px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}
.topbar nav a:hover { color: var(--accent); text-decoration: none; }

/* ── Layout ──────────────────────────────────────────────────────────────── */

.container {
  max-width: 1280px;
  margin: 24px auto;
  padding: 0 24px 40px;
}

h1 {
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 8px 0;
}
h2 {
  font-size: 16px;
  font-weight: 600;
  margin: 28px 0 10px 0;
}

.muted { color: var(--muted); }
.small { font-size: 12px; }

/* ── Tables ──────────────────────────────────────────────────────────────── */

.grid {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin-top: 12px;
}
.grid th, .grid td {
  text-align: left;
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  vertical-align: middle;
}
.grid thead th {
  background: #f6f7f9;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 11px;
}
.grid tbody tr:last-child td { border-bottom: none; }
.grid tbody tr:hover { background: #f9fafb; }
.grid.compact th, .grid.compact td { padding: 6px 10px; font-size: 12.5px; }

.name { font-weight: 500; }

/* ── Chips ──────────────────────────────────────────────────────────────── */

.chip {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  background: var(--code-bg);
  color: var(--muted);
  margin-right: 4px;
}
.chip-cd_1        { background: #dbeafe; color: #1d4ed8; }
.chip-cd_1_total  { background: #ede9fe; color: #6d28d9; }
.chip-pump_1_pressure { background: #dcfce7; color: #15803d; }
.chip-audit       { background: var(--code-bg); color: var(--muted); }

.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin: 0 4px;
  vertical-align: middle;
}
.dot.ok { background: var(--good); }
.dot.bad { background: var(--bad); }
.dot.muted { background: #d1d5db; }

/* ──Toolbar ───────────────────────────────────────────────────────────────────── */

.chart-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 28px;
  align-items: center;
  padding: 10px 14px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  margin: 12px 0 0 0;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.toolbar-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.btn-toggle {
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 5px 12px;
  border-radius: 4px;
  font-size: 13px;
  cursor: pointer;
}
.btn-toggle:hover { background: var(--code-bg); color: var(--fg); }
.btn-toggle.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.btn-link {
  background: none;
  border: none;
  color: var(--accent);
  padding: 2px 6px;
  font-size: 12px;
  cursor: pointer;
  text-decoration: underline;
}
.btn-link:hover { background: var(--accent-light); border-radius: 3px; text-decoration: none; }

.sig-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  font-size: 13px;
  user-select: none;
}
.sig-toggle input[type=checkbox] {
  margin: 0 4px 0 0;
  cursor: pointer;
}

.toolbar-sep {
  color: var(--border);
  margin: 0 4px;
}

.toolbar-hint {
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
}

.overlay-toolbar {
  margin: 0 0 8px 0;
  padding: 8px 14px;
}

/* ──Chart container ──────────────────────────────────────────────────────────── */

.chart {
  width: 100%;
  height: 540px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px;
  margin: 16px 0;
}

/* ──Forms ──────────────────────────────────────────────────────────────── */

.channel-picker { margin: 8px 0 4px 0; }
.channel-picker select {
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
  font-size: 13px;
}

.upload-form {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 16px;
  background: var(--card-bg);
  border: 1px dashed var(--border);
  border-radius: 6px;
  margin-top: 12px;
}
.upload-form input[type=file] {
  font-size: 13px;
}
button, .upload-form button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 7px 14px;
  border-radius: 4px;
  font-size: 13px;
  cursor: pointer;
}
button:hover { background: #1d4ed8; }

/* ──Flashes / footer ──────────────────────────────────────────────────────────── */

.flashes { list-style: none; padding: 0; margin: 0 0 12px 0; }
.flash {
  padding: 8px 12px;
  border-radius: 4px;
  margin-bottom: 6px;
  font-size: 13px;
}
.flash.error { background: #fee2e2; color: #991b1b; }
.flash.success { background: #dcfce7; color: #166534; }

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 16px;
  border-top: 1px solid var(--border);
  background: var(--card-bg);
  margin-top: 24px;
}