:root {
  --bg: #eef1f6;
  --bg-grad: radial-gradient(1200px 600px at 15% -10%, color-mix(in srgb, var(--accent) 10%, transparent), transparent),
    radial-gradient(900px 500px at 100% 0%, color-mix(in srgb, var(--series-sump) 8%, transparent), transparent);
  --surface: #ffffff;
  --text: #10151a;
  --text-dim: #5a6672;
  --border: #cdd5de;
  --accent: #1673ff;
  --ok: #1caa5c;
  --warn: #e0a30b;
  --danger: #e0392b;
  --radius: 14px;
  --shadow-sm: 0 2px 10px rgba(20, 30, 45, 0.08);
  --shadow-md: 0 6px 22px rgba(20, 30, 45, 0.13);
  /* Chart series colors — distinct from the status colors above (ok/warn/danger
     carry meaning elsewhere in this UI: running/fault state) so a chart line
     never gets misread as a status. Categorical slots 1 (blue) and 2 (aqua). */
  --series-oht: #2a78d6;
  --series-sump: #1baf7a;
  --series-borewell: #e67e22;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #080f1c;
    --surface: #0f1929;
    --text: #eef2f6;
    --text-dim: #93a1b3;
    --border: #1e3050;
    --accent: #3d8bff;
    --ok: #2fd377;
    --warn: #f0b90b;
    --danger: #ff5a48;
    --series-oht: #3987e5;
    --series-sump: #199e70;
    --series-borewell: #e8813a;
    --shadow-sm: 0 2px 14px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 10px 32px rgba(0, 0, 0, 0.50);
  }
}

* { box-sizing: border-box; }

/* Author rules like `.fault-banner { display: flex }` otherwise beat the
   UA stylesheet's [hidden] rule on specificity, leaving hidden elements
   visible. This wins regardless of what else targets the element. */
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg-grad), var(--bg);
  background-attachment: fixed;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Thin, theme-matched scrollbars on the scrolling log/list panels - a
   Chrome/Safari-only touch (silently ignored elsewhere), not load-bearing. */
.fault-list, .event-list, .device-log-list, .wifi-scan-list {
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.fault-list::-webkit-scrollbar, .event-list::-webkit-scrollbar,
.device-log-list::-webkit-scrollbar, .wifi-scan-list::-webkit-scrollbar { width: 7px; }
.fault-list::-webkit-scrollbar-thumb, .event-list::-webkit-scrollbar-thumb,
.device-log-list::-webkit-scrollbar-thumb, .wifi-scan-list::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 999px;
}

.brand-icon {
  width: 1.05em;
  height: 1.05em;
  color: var(--accent);
  vertical-align: -0.15em;
  margin-right: 8px;
  flex-shrink: 0;
}

/* Login */
#login-view {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  padding: 36px 32px;
  width: 100%;
  max-width: 340px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: var(--shadow-md);
}

.login-card h1 {
  margin: 0 0 8px;
  font-size: 1.35rem;
  display: flex;
  align-items: center;
}

.login-card h1 .brand-icon { width: 1.3em; height: 1.3em; }

.login-card label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.login-card input {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.login-card input:focus,
input:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}

.login-card button[type="submit"], #login-panel button[type="submit"] {
  width: 100%;
  margin-top: 6px;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 115%, #fff 0%), var(--accent));
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 14px color-mix(in srgb, var(--accent) 35%, transparent);
  transition: transform 0.08s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

.login-card button[type="submit"]:hover { filter: brightness(1.05); }
.login-card button[type="submit"]:active { transform: translateY(1px); }

.error { color: var(--danger); font-size: 0.85rem; margin: 0; }

/* App shell */
.topbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 14px 24px;
  border-bottom: 2px solid var(--accent);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 2px 16px color-mix(in srgb, var(--accent) 15%, transparent);
}

/* Grid layout: h1 (1fr) | nav (auto, centered) | topbar-right (1fr, right-aligned).
   Each column is independent — topbar-right growing as #whoami/#device-status fill in
   after /api/me returns cannot shift the nav column. Fixes CLS 0.34. */
.topbar h1 { font-size: 1.15rem; margin: 0; display: flex; align-items: center; font-weight: 700; }

.topbar-nav { display: flex; align-items: center; gap: 4px; }
.topbar-nav a { font-size: 0.8rem; color: var(--text-dim); text-decoration: none; padding: 4px 10px; border-radius: 999px; transition: background 0.15s, color 0.15s; }
.topbar-nav a:hover { background: var(--surface-raised); color: var(--text); }
@media (max-width: 680px) { .topbar-nav { display: none; } }

.topbar-right { display: flex; align-items: center; gap: 14px; justify-self: end; }
#device-status { min-width: 5.5rem; text-align: center; }
.whoami { min-width: 12ch; }

.badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--border);
  color: var(--text-dim);
}

.badge.online { background: color-mix(in srgb, var(--ok) 18%, transparent); color: var(--ok); }
.badge.offline { background: color-mix(in srgb, var(--danger) 18%, transparent); color: var(--danger); }
.badge.warn  { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--warn); }

.link-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 0.85rem;
  cursor: pointer;
  text-decoration: underline;
}
.link-btn:hover { color: var(--text); }

.apk-dl-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #3ddc97;
  color: #0d1117;
  padding: 4px 12px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.82rem;
  text-decoration: none;
  transition: background 0.2s;
}
.apk-dl-btn:hover { background: #2dbf7e; color: #0d1117; }

.fault-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: color-mix(in srgb, var(--danger) 15%, var(--surface));
  border-bottom: 1px solid var(--danger);
  padding: 12px 20px;
  color: var(--danger);
  font-size: 0.9rem;
  font-weight: 600;
}

.fault-banner button {
  border: 1px solid var(--danger);
  background: transparent;
  color: var(--danger);
  padding: 7px 16px;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  font-weight: 700;
  transition: background 0.15s ease, color 0.15s ease;
}
.fault-banner button:hover { background: var(--danger); color: #fff; }

.dashboard {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Offset anchor scroll so the sticky topbar doesn't cover the section.
   ~64px = topbar height (14px pad top + ~18px text + 14px pad bottom + 2px border) + 16px breathing room. */
.dashboard section {
  scroll-margin-top: 64px;
}

/* Sections as cards */
.dashboard section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

/* Direct-child h2: pull to card edges with negative margins, style as a
   full-bleed header bar. Does not affect h2s inside .tank-card or
   .pump-card-head (those are nested, not direct children of section). */
.dashboard section > h2 {
  margin: -20px -20px 16px;
  padding: 11px 20px 11px 17px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  background: color-mix(in srgb, var(--accent) 6%, var(--surface));
  border-bottom: 1px solid var(--border);
  border-left: 3px solid var(--accent);
}

/* history-head plays the same header-bar role for the history section
   (h2 lives inside a flex row alongside the chart legend). */
.history-head {
  margin: -20px -20px 14px;
  padding: 10px 20px 10px 17px;
  background: color-mix(in srgb, var(--accent) 6%, var(--surface));
  border-bottom: 1px solid var(--border);
  border-left: 3px solid var(--accent);
}
.history-head h2 { margin: 0; font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-dim); }

.tanks { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; border-top: 3px solid var(--accent); }

.tank-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease;
}

.tank-card:hover { box-shadow: var(--shadow-md); }

.tank-card h2 { margin: 0 0 14px; font-size: 0.75rem; color: var(--text-dim); font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; }

.tank-visual {
  height: 150px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--accent) 5%, var(--surface));
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.08);
}

.tank-fill {
  width: 100%;
  height: 0%;
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 70%, #fff 15%), var(--accent) 35%, color-mix(in srgb, var(--accent) 75%, #000));
  transition: height 0.6s ease;
  position: relative;
}

/* A soft highlight riding the top edge of the fill reads as a meniscus/
   water-surface glint rather than a flat color block filling up. */
.tank-fill::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 10px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0));
}

.tank-pct { margin-top: 12px; font-size: 1.6rem; font-weight: 800; letter-spacing: -0.02em; }

.tank-liters { margin-top: 2px; font-size: 0.85rem; color: var(--text-dim); }

.tank-estimate { margin-top: 6px; font-size: 0.75rem; color: var(--accent, #60b4ff); font-weight: 600; }

.pumps { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; border-top: 3px solid var(--ok); }

.pump-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: box-shadow 0.2s ease;
}

.pump-card:hover { box-shadow: var(--shadow-md); }

.pump-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.pump-card-head h2 { margin: 0; font-size: 1.05rem; font-weight: 700; }

.pump-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  width: fit-content;
  padding: 5px 12px 5px 8px;
  border-radius: 999px;
  background: var(--bg);
  color: var(--text-dim);
}

.run-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--text-dim);
  flex-shrink: 0;
}

.run-dot.running {
  background: var(--ok);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--ok) 22%, transparent);
  animation: pulse-dot 1.8s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 4px color-mix(in srgb, var(--ok) 22%, transparent); }
  50% { box-shadow: 0 0 0 7px color-mix(in srgb, var(--ok) 12%, transparent); }
}

.pump-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  text-align: center;
}

.pump-metrics > div {
  background: var(--bg);
  border-radius: 10px;
  padding: 10px 4px;
}

.metric-label {
  display: block;
  font-size: 0.65rem;
  color: var(--text-dim);
  margin-bottom: 3px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.pump-metrics span:not(.metric-label) { font-size: 1.05rem; font-weight: 700; }

.pump-controls { display: flex; gap: 12px; }

/* Styled like a physical panel push-button (glossy dome highlight + a
   bottom "ledge" shadow that compresses on press) rather than a flat web
   button - this is a control panel for real pump relays, so it should
   read as a tactile switch, not a hyperlink. */
.pump-controls button {
  flex: 1;
  padding: 14px 8px;
  border-radius: 14px;
  border: none;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  box-shadow:
    0 3px 0 rgba(0, 0, 0, 0.28),
    0 6px 12px rgba(0, 0, 0, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
  transition: transform 0.08s ease, box-shadow 0.08s ease, filter 0.15s ease;
}

.pump-controls button .btn-icon { font-size: 0.75em; line-height: 1; }

.pump-on-btn {
  background: radial-gradient(circle at 35% 20%, color-mix(in srgb, var(--ok) 55%, #fff), var(--ok) 55%, color-mix(in srgb, var(--ok) 75%, #000));
}

.pump-off-btn {
  background: radial-gradient(circle at 35% 20%, color-mix(in srgb, var(--danger) 55%, #fff), var(--danger) 55%, color-mix(in srgb, var(--danger) 75%, #000));
}

.pump-controls button:hover:not(:disabled) { filter: brightness(1.08); }

.pump-controls button:active:not(:disabled) {
  transform: translateY(3px);
  box-shadow:
    0 0 0 rgba(0, 0, 0, 0.28),
    0 2px 6px rgba(0, 0, 0, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.pump-controls button:disabled {
  background: var(--border);
  color: var(--text-dim);
  box-shadow: none;
  cursor: not-allowed;
}

.pump-hint { margin: 0; font-size: 0.75rem; color: var(--text-dim); min-height: 1em; }

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

/* No bottom margin here specifically - .history-head above already
   carries the spacing to what follows, and this h2 sits in a flex row
   next to the chart legend where its own margin would look uneven. */
.history-head h2 { margin: 0; }

.chart-legend { display: flex; gap: 14px; }

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 600;
}

.legend-swatch {
  width: 14px;
  height: 3px;
  border-radius: 2px;
  display: inline-block;
}

.history-range-picker {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.history-range-picker label {
  display: flex;
  align-items: center;
  gap: 6px;
}

.history-range-picker input[type="date"] {
  font-size: 0.8rem;
}

.history-range-picker button {
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.history-range-picker button:hover { border-color: var(--accent); color: var(--accent); }
#history-range-apply { background: var(--accent); color: #fff; border-color: transparent; }
#history-range-apply:hover { filter: brightness(1.08); color: #fff; }

.chart-wrap {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
}

.chart-wrap svg {
  width: 100%;
  height: 200px;
  display: block;
  overflow: visible;
}

.chart-grid { stroke: var(--border); stroke-width: 1; }

.chart-axis-label {
  fill: var(--text-dim);
  font-size: 9px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.chart-line { fill: none; stroke-width: 2.25; stroke-linejoin: round; stroke-linecap: round; }

.chart-crosshair { stroke: var(--text-dim); stroke-width: 1; opacity: 0; pointer-events: none; }

.chart-dot { r: 3.5; stroke: var(--surface); stroke-width: 2; opacity: 0; pointer-events: none; }

.chart-tooltip {
  position: absolute;
  top: 8px;
  pointer-events: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 0.75rem;
  white-space: nowrap;
  box-shadow: var(--shadow-md);
}

.chart-tooltip .tt-time { color: var(--text-dim); margin-bottom: 4px; }

.chart-tooltip .tt-row { display: flex; align-items: center; gap: 6px; }

.chart-tooltip .tt-key {
  width: 10px;
  height: 2px;
  display: inline-block;
  border-radius: 1px;
}

.chart-tooltip .tt-value { font-weight: 700; color: var(--text); }

.chart-empty {
  margin: 0;
  padding: 60px 0;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
}

.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 10px;
}

.device-stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 8px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 5px;
  box-shadow: var(--shadow-sm);
}

.device-stat span:last-child { font-size: 0.9rem; font-weight: 700; }

@media (max-width: 640px) {
  .device-grid { grid-template-columns: repeat(2, 1fr); }
}

.fault-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 320px;
  overflow-y: auto;
}

.fault-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.fault-list li.empty { color: var(--text-dim); justify-content: center; border-left-color: var(--border); }
.fault-list li.open { border-left-color: var(--danger); color: var(--danger); font-weight: 600; }
.fault-list li.auto-resolved { border-left-color: var(--ok); }
.fault-id { font-size: 0.7rem; font-family: monospace; color: var(--text-dim); margin-right: 6px; background: var(--surface-raised); padding: 1px 4px; border-radius: 3px; }

.whoami { font-size: 0.8rem; color: var(--text-dim); }

.last-updated { font-size: 0.75rem; color: var(--text-dim); white-space: nowrap; }
.last-updated.stale { color: var(--warning, #f59e0b); }
.last-updated.stale::after { content: " ⚠ data stale"; }

.firmware-status {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
}

.firmware-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.85rem;
}

.firmware-row .metric-label { margin: 0; }

.fw-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--border);
  color: var(--text-dim);
}

.fw-badge.pending { background: color-mix(in srgb, var(--warn) 22%, transparent); color: var(--warn); }
.fw-badge.approved { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent); }
.fw-badge.installed { background: color-mix(in srgb, var(--ok) 18%, transparent); color: var(--ok); }

.firmware-upload-form {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.firmware-upload-form input[type="text"] {
  flex: 1;
  min-width: 140px;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.85rem;
}

.firmware-upload-form input[type="file"] {
  flex: 2;
  min-width: 160px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Shared "pill" primary-action button look, reused by every secondary
   action across the dashboard (upload/install/reboot/wifi/settings/users) -
   consistent weight and a small hover-lift so they read as one family of
   controls, distinct from the pump start/stop panel buttons above. */
.firmware-upload-form button,
.fw-approve-btn,
.reboot-btn,
.wifi-scan-list + .wifi-change-form button,
#wifi-scan-btn,
#push-toggle-btn,
.settings-actions button,
.add-user-form button {
  padding: 10px 20px;
  border-radius: 999px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  font-size: 0.85rem;
  box-shadow: 0 3px 10px color-mix(in srgb, var(--accent) 30%, transparent);
  transition: transform 0.08s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

.firmware-upload-form button:hover,
.fw-approve-btn:hover:not(:disabled),
.reboot-btn:hover:not(:disabled),
#wifi-scan-btn:hover:not(:disabled),
#push-toggle-btn:hover:not(:disabled),
.wifi-change-form button:hover:not(:disabled),
.settings-actions button:hover:not(:disabled),
.add-user-form button:hover { filter: brightness(1.08); }

.firmware-upload-form button:active,
.fw-approve-btn:active:not(:disabled),
.reboot-btn:active:not(:disabled),
#wifi-scan-btn:active:not(:disabled),
#push-toggle-btn:active:not(:disabled),
.wifi-change-form button:active:not(:disabled),
.settings-actions button:active:not(:disabled),
.add-user-form button:active { transform: translateY(1px); }

.fw-approve-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.reboot-btn { margin-top: 12px; }
.reboot-btn:disabled, #wifi-scan-btn:disabled, .wifi-change-form button:disabled, #push-toggle-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.wifi-scan-list {
  list-style: none;
  margin: 12px 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 200px;
  overflow-y: auto;
}

.wifi-scan-list li.empty { color: var(--text-dim); }

.wifi-scan-item {
  display: flex;
  justify-content: space-between;
  padding: 9px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  font-size: 0.85rem;
  transition: border-color 0.15s ease, transform 0.08s ease;
}

.wifi-scan-item:hover { border-color: var(--accent); transform: translateX(2px); }

.wifi-change-form {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.wifi-change-form input {
  flex: 1;
  min-width: 140px;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.85rem;
}

.event-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 320px;
  overflow-y: auto;
}

.event-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.event-list li .event-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.event-list li .event-detail {
  color: var(--text-dim);
  font-size: 0.78rem;
}

.event-list li.empty { color: var(--text-dim); justify-content: center; border-left-color: var(--border); }

.device-log .settings-hint { margin: 0 0 12px; }

.log-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--fault, #e74c3c);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 9px;
  margin-left: 8px;
  vertical-align: middle;
}

.log-search-wrap { margin-bottom: 10px; }
.log-search-wrap input[type="search"] {
  width: 100%;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-raised);
  color: var(--text);
  font-size: 0.85rem;
}
.device-log-list mark {
  background: #f0a500;
  color: #000;
  border-radius: 2px;
  padding: 0 1px;
}

.device-log-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 320px;
  overflow-y: auto;
}

.device-log-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 12px;
  font-size: 0.78rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--text-dim);
}

.device-log-list li.empty { justify-content: center; font-family: inherit; }

.event-trigger {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--border);
  color: var(--text-dim);
  white-space: nowrap;
}

.event-trigger.dashboard { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent); }
.event-trigger.auto { background: color-mix(in srgb, var(--ok) 18%, transparent); color: var(--ok); }
.event-trigger.manual { background: color-mix(in srgb, var(--warn) 22%, transparent); color: var(--warn); }
.event-trigger.fault { background: color-mix(in srgb, var(--danger) 18%, transparent); color: var(--danger); }

.settings-hint { margin: 0 0 14px; font-size: 0.8rem; color: var(--text-dim); }

.settings-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.settings-form fieldset {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px 16px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.settings-form input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.settings-actions button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  box-shadow: none;
}

.settings-form legend {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  padding: 0 6px;
}

.settings-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-dim);
}

.settings-form input:not([type="checkbox"]),
.settings-form select {
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.9rem;
}

.settings-form label.settings-checkbox {
  flex-direction: row;
  align-items: center;
  gap: 8px;
}

.settings-form .settings-checkbox input {
  width: 16px;
  height: 16px;
}

.settings-form fieldset > p.settings-hint {
  grid-column: 1 / -1;
  margin: 0 0 2px;
}

.settings-form select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.capacity-readout {
  grid-column: 1 / -1;
  font-size: 0.8rem;
  color: var(--text-dim);
  padding-top: 2px;
}

.capacity-readout span { font-weight: 700; color: var(--text); }

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

.settings-updated { font-size: 0.75rem; color: var(--text-dim); }

@media (max-width: 640px) {
  .settings-form fieldset { grid-template-columns: 1fr 1fr; }
}

.user-list { display: none; } /* replaced by .user-table */

.user-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin: 0 0 14px;
}

.user-table thead th {
  text-align: left;
  padding: 6px 12px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
}

.user-table tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}

.user-table tbody tr:last-child { border-bottom: none; }
.user-table tbody tr:hover { background: color-mix(in srgb, var(--accent) 4%, transparent); }
.user-table tbody tr.user-disabled { opacity: 0.5; }
.user-table tbody tr.editing td { padding: 10px 12px; }

.user-table td {
  padding: 9px 12px;
  vertical-align: middle;
}

.user-table td.username { color: var(--text-dim); font-size: 0.8rem; }
.user-table td.user-actions { text-align: right; white-space: nowrap; }

.user-icon-btn {
  border: none;
  background: none;
  color: var(--text-dim);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
}

.user-icon-btn:hover { color: var(--text); background: var(--border); }
.user-icon-btn.danger:hover { color: var(--danger); }

.user-edit-form {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  width: 100%;
}

.user-edit-form input {
  flex: 1;
  min-width: 110px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.85rem;
}

.user-edit-form button {
  padding: 7px 14px;
  border-radius: 999px;
  border: none;
  font-size: 0.8rem;
  cursor: pointer;
  font-weight: 600;
}

.user-edit-form button[type="submit"] { background: var(--accent); color: #fff; font-weight: 700; }
.user-edit-form button.user-edit-cancel { background: var(--border); color: var(--text); }

.role-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--accent);
}
.member-badge {
  background: color-mix(in srgb, var(--text-dim) 15%, transparent);
  color: var(--text-dim);
}
.viewer-badge {
  background: color-mix(in srgb, #888 15%, transparent);
  color: #888;
}
.disabled-badge {
  background: color-mix(in srgb, var(--danger) 15%, transparent);
  color: var(--danger);
}
.role-select {
  padding: 6px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.875rem;
}

.add-user-form {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.add-user-form label.admin-check {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.add-user-form input {
  flex: 1;
  min-width: 120px;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.85rem;
}

@media (max-width: 520px) {
  .tanks, .pumps { grid-template-columns: 1fr; }
}

/* Per-section accent top borders */
section.history    { border-top: 3px solid var(--series-oht); }
section.device     { border-top: 3px solid var(--accent); }
section.faults     { border-top: 3px solid var(--danger); }
section.events     { border-top: 3px solid var(--ok); }
section.device-log { border-top: 3px solid var(--text-dim); }
section.firmware   { border-top: 3px solid var(--warn); }
section.settings   { border-top: 3px solid var(--accent); }
section.notifications { border-top: 3px solid var(--ok); }
section.users      { border-top: 3px solid var(--accent); }
section.wifi       { border-top: 3px solid var(--accent); }
section.usage      { border-top: 3px solid var(--series-borewell); }
section.schedules  { border-top: 3px solid var(--warn); }

/* Usage chart */
.usage-chart-wrap { width: 100%; overflow-x: auto; margin: 12px 0 8px; }
.usage-chart { width: 100%; min-width: 320px; height: 170px; display: block; }
.usage-legend { display: flex; gap: 16px; margin-bottom: 4px; }

/* Export row */
.export-row { display: flex; align-items: center; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.export-row select { padding: 5px 8px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font-size: 0.85rem; }
.btn-secondary { padding: 6px 14px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface); color: var(--accent); font-size: 0.85rem; font-weight: 600; text-decoration: none; cursor: pointer; }
.btn-secondary:hover { background: color-mix(in srgb, var(--accent) 8%, var(--surface)); }

/* Schedules */
.schedules-list { display: flex; flex-direction: column; gap: 12px; margin-top: 12px; }
.schedule-row { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 12px 16px; }
.schedule-pump { font-weight: 700; font-size: 0.95rem; min-width: 70px; }
.schedule-info { color: var(--text-dim); font-size: 0.88rem; }
.schedule-toggle { display: flex; align-items: center; gap: 6px; font-size: 0.88rem; cursor: pointer; }
.schedule-row label { font-size: 0.85rem; color: var(--text-dim); display: flex; align-items: center; gap: 6px; }
.schedule-row input[type="time"] { padding: 4px 8px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font-size: 0.85rem; }
.schedule-row select { padding: 4px 8px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font-size: 0.85rem; }
.sched-save-btn { padding: 5px 14px; border-radius: 6px; border: none; background: var(--accent); color: #fff; font-size: 0.85rem; font-weight: 600; cursor: pointer; }
.sched-save-btn:disabled { opacity: 0.6; cursor: default; }

/* Account section */
section.account { border-top: 3px solid var(--text-dim); }
section.account h3 { margin: 0 0 12px; font-size: 1rem; }

/* Auth tabs (login / register) */
.auth-tabs { display: flex; gap: 0; margin-bottom: 20px; border-radius: 8px; overflow: hidden; border: 1px solid var(--border); }
.auth-tab { flex: 1; padding: 8px; background: var(--surface); border: none; color: var(--text-dim); font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: background 0.15s, color 0.15s; box-shadow: none; width: auto; margin-top: 0; border-radius: 0; }
.auth-tab.active { background: var(--accent); color: #fff; }
.auth-tab:not(.active):hover { background: color-mix(in srgb, var(--accent) 8%, var(--surface)); color: var(--text); filter: none; }
#forgot-send-btn, #forgot-reset-btn { width: 100%; margin-top: 6px; padding: 12px; border: none; border-radius: 10px; background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 115%, #fff 0%), var(--accent)); color: #fff; font-size: 1rem; font-weight: 700; cursor: pointer; box-shadow: 0 4px 14px color-mix(in srgb, var(--accent) 35%, transparent); transition: filter 0.15s ease; }
#forgot-send-btn:hover, #forgot-reset-btn:hover { filter: brightness(1.05); }
#forgot-send-btn:disabled, #forgot-reset-btn:disabled { opacity: 0.6; cursor: default; }
.forgot-link { display: block; margin: 10px auto 4px; font-size: 0.85rem; color: var(--accent); cursor: pointer; background: none; border: 1px solid var(--accent); padding: 7px 18px; width: fit-content; box-shadow: none; border-radius: 8px; }
.forgot-link:hover { background: color-mix(in srgb, var(--accent) 10%, transparent); filter: none; }
#forgot-panel input { width: 100%; box-sizing: border-box; }
.otp-row { display: flex; gap: 8px; }
.otp-row input { flex: 1; letter-spacing: 0.2em; font-size: 1.1rem; text-align: center; }
.back-link { font-size: 0.82rem; color: var(--text-dim); cursor: pointer; background: none; border: none; padding: 0; margin-top: 6px; display: block; text-align: center; }
.back-link:hover { color: var(--text); }

/* Register panel */
#register-panel label { display: flex; flex-direction: column; gap: 4px; font-size: 0.85rem; color: var(--text-dim); margin-bottom: 10px; }
#register-panel input { padding: 9px 12px; border-radius: 8px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font-size: 0.95rem; }
#reg-submit-btn { width: 100%; padding: 11px; border-radius: 8px; border: none; background: var(--accent); color: #fff; font-size: 1rem; font-weight: 700; cursor: pointer; margin-top: 4px; }
#reg-submit-btn:disabled { opacity: 0.6; cursor: default; }
.hint { font-size: 0.8rem; color: var(--text-dim); font-weight: 400; }

/* Pending users */
.subsection-title { font-size: 0.9rem; font-weight: 700; color: var(--text-dim); margin: 16px 0 8px; text-transform: uppercase; letter-spacing: 0.04em; }
.pending-list li { background: color-mix(in srgb, var(--warn) 8%, var(--surface)); border: 1px solid color-mix(in srgb, var(--warn) 30%, var(--border)); }
.pending-user { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.user-approve-btn { padding: 4px 12px; border-radius: 6px; border: none; background: var(--ok); color: #fff; font-size: 0.82rem; font-weight: 600; cursor: pointer; }
.user-approve-btn:hover { opacity: 0.85; }

/* Pump usage chart tooltip */
.chart-tooltip {
  position: absolute;
  z-index: 200;
  transform: translate(-50%, -100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md, 0 4px 16px rgba(0,0,0,.18));
  padding: 10px 14px;
  font-size: 0.8rem;
  line-height: 1.7;
  white-space: nowrap;
  pointer-events: none;
  color: var(--text);
}
.chart-tooltip strong { display: block; font-size: 0.85rem; margin-bottom: 2px; }
.tip-sump    { color: var(--series-sump); font-weight: 700; }
.tip-bore    { color: var(--series-borewell); font-weight: 700; }

/* Bill calculator */
.bill-reading-row { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
.bill-reading-field { display: flex; flex-direction: column; gap: 5px; flex: 1; min-width: 140px; }
.bill-reading-field input { padding: 9px 12px; border-radius: 8px; border: 1px solid var(--border); background: var(--surface-raised); color: var(--text); font-size: 1.05rem; font-weight: 700; font-variant-numeric: tabular-nums; outline: none; transition: border-color 0.15s; }
.bill-reading-field input:focus { border-color: var(--accent); }
.bill-total-box { background: color-mix(in srgb, var(--ok) 8%, var(--surface)); border: 1px solid color-mix(in srgb, var(--ok) 25%, var(--border)); border-radius: var(--radius); padding: 16px 20px; margin-bottom: 16px; }
.bill-total-amount { font-size: 2.4rem; font-weight: 800; color: var(--ok); letter-spacing: -0.03em; font-variant-numeric: tabular-nums; line-height: 1.1; margin-top: 4px; }
.bill-total-breakdown { font-size: 0.78rem; color: var(--text-dim); margin-top: 4px; font-variant-numeric: tabular-nums; }
.bill-history-wrap { overflow-x: auto; }
.bill-history-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; font-variant-numeric: tabular-nums; }
.bill-history-table th { text-align: left; padding: 5px 10px 5px 0; color: var(--text-dim); font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; border-bottom: 1px solid var(--border); white-space: nowrap; }
.bill-history-table th:last-child { text-align: right; }
.bill-history-table td { padding: 6px 10px 6px 0; border-bottom: 1px solid var(--border); white-space: nowrap; }
.bill-history-table tr:last-child td { border-bottom: none; }
.bill-history-table td:last-child { text-align: right; color: var(--ok); font-weight: 700; }
.bill-history-table td.dim { color: var(--text-dim); }
.bill-bar-cell { width: 70px; }
.bill-bar-wrap { background: var(--surface-raised); border-radius: 2px; height: 4px; overflow: hidden; }
.bill-bar-fill { background: var(--ok); height: 100%; border-radius: 2px; opacity: 0.65; }
.bill-save-form { display: flex; gap: 16px; flex-wrap: wrap; align-items: flex-end; margin-bottom: 16px; }
.bill-save-form .bill-reading-field { flex: 1; min-width: 160px; }
.bill-delete-btn { background: none; border: none; color: var(--text-dim); cursor: pointer; font-size: 1.1rem; padding: 0 4px; opacity: 0.5; }
.bill-delete-btn:hover { color: var(--danger); opacity: 1; }

.maintenance-banner {
  background: color-mix(in srgb, var(--warn, #f59e0b) 12%, var(--surface));
  border: 1px solid var(--warn, #f59e0b);
  color: var(--warn, #f59e0b);
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 14px;
}

/* ── Session management ─────────────────────────────────────────── */
.danger-btn {
  padding: 4px 12px;
  border-radius: 6px;
  border: 1px solid var(--danger);
  background: transparent;
  color: var(--danger);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.danger-btn:hover:not(:disabled) { background: color-mix(in srgb, var(--danger) 12%, transparent); }
.danger-btn:disabled { opacity: 0.5; cursor: default; }

.session-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.87rem;
}
.session-row:last-child { border-bottom: none; }
.session-icon { font-size: 1.1rem; flex-shrink: 0; }
.session-label { flex: 1; font-weight: 600; }
.session-meta { color: var(--text-dim); font-size: 0.78rem; white-space: nowrap; }
.session-badge {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  vertical-align: middle;
  margin-left: 4px;
}

/* OHT Slave details */
.oht-slave-details { margin-top: 12px; }
.oht-slave-details summary { cursor: pointer; font-size: 0.9rem; color: var(--text-dim); user-select: none; }
.slave-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-left: 6px; vertical-align: middle; }
.slave-dot--online { background: #4caf50; }
.slave-dot--offline { background: var(--text-dim); }