/* Caterham Well Level Monitoring — design tokens + layout */

:root {
  --page: #f9f9f7;
  --surface-1: #fcfcfb;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --grid: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --series-1: #2a78d6;

  /* status palette: normal/watch/warning/severe -> good/warning/serious/critical */
  --band-normal: #0ca30c;
  --band-watch: #fab219;
  --band-warning: #ec835a;
  --band-severe: #d03b3b;

  --band-normal-bg: rgba(12, 163, 12, 0.07);
  --band-watch-bg: rgba(250, 178, 25, 0.16);
  --band-warning-bg: rgba(236, 131, 90, 0.18);
  --band-severe-bg: rgba(208, 59, 59, 0.16);

  --radius: 10px;
  --shadow: 0 1px 2px rgba(11, 11, 11, 0.05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #0d0d0d;
    --surface-1: #1a1a19;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --grid: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --series-1: #3987e5;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--page);
  color: var(--text-primary);
  font-size: 14px;
}

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 10px 20px;
  background: var(--surface-1);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1100;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { font-size: 24px; }
.brand h1 { font-size: 16px; font-weight: 650; margin: 0; letter-spacing: -0.01em; }
.brand-sub { margin: 0; font-size: 11.5px; color: var(--text-muted); }

.band-legend { display: flex; gap: 8px; margin-left: auto; flex-wrap: wrap; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
}
.chip i { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.chip.band-normal i { background: var(--band-normal); }
.chip.band-watch i { background: var(--band-watch); }
.chip.band-warning i { background: var(--band-warning); }
.chip.band-severe i { background: var(--band-severe); }

.user-menu { display: flex; align-items: center; gap: 10px; }
.user-name { color: var(--text-secondary); font-size: 12.5px; }
.btn-ghost {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  padding: 5px 12px;
  font: inherit;
  font-size: 12.5px;
  cursor: pointer;
}
.btn-ghost:hover { color: var(--text-primary); border-color: var(--baseline); }

/* ---------- layout ---------- */
.layout {
  display: grid;
  grid-template-columns: minmax(380px, 5fr) minmax(420px, 4fr);
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 16px;
  padding: 16px 20px;
  height: calc(100vh - 57px);
}

/* full-width, always-visible alerts strip */
.alerts-row {
  grid-column: 1 / -1;
  padding: 10px 16px;
}
.alerts-row .card-head { margin-bottom: 4px; }
.alerts-row .alert-list {
  max-height: 96px;
  overflow-y: auto;
}

/* ---------- summary donut tiles ---------- */
.summary-row {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}
.summary-tile {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
}
.summary-tile svg { flex: none; }
.donut-track { stroke: var(--grid); }
.donut-value {
  font-size: 17px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  fill: var(--text-primary);
}
.summary-text h3 { margin: 0; font-size: 13.5px; font-weight: 650; }
.summary-text p { margin: 2px 0 0; font-size: 11.5px; color: var(--text-muted); }
.summary-text .summary-note { font-weight: 600; color: var(--text-secondary); }
.map-pane {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  min-height: 0; /* constrained by the grid row; fixed height on mobile below */
}
#map { height: 100%; width: 100%; background: var(--page); }
.detail-pane { overflow-y: auto; display: flex; flex-direction: column; gap: 16px; padding-bottom: 8px; }

@media (max-width: 1020px) {
  .layout { grid-template-columns: 1fr; height: auto; }
  .map-pane { height: 55vh; }
  .band-legend { display: none; }
}

/* ---------- cards ---------- */
.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}
.card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}
.card h2 { font-size: 14.5px; font-weight: 650; margin: 0; }
.card-sub { margin: 2px 0 0; font-size: 12px; color: var(--text-muted); }

/* ---------- range controls ---------- */
.range-controls { display: flex; gap: 4px; }
.range-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font: inherit;
  font-size: 12px;
  padding: 4px 10px;
  cursor: pointer;
}
.range-btn:hover { color: var(--text-primary); }
.range-btn.active {
  background: var(--series-1);
  border-color: var(--series-1);
  color: #fff;
  font-weight: 600;
}
.custom-range {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
  font-size: 12.5px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}
.custom-range input {
  font: inherit;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 6px;
  background: var(--page);
  color: var(--text-primary);
}
.btn-small {
  font: inherit;
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 6px;
  border: 1px solid var(--series-1);
  background: var(--series-1);
  color: #fff;
  cursor: pointer;
}

.chart-wrap { position: relative; height: 320px; }

/* ---------- well details ---------- */
.status-pill {
  font-size: 12px;
  font-weight: 650;
  border-radius: 999px;
  padding: 4px 12px;
  color: #fff;
  white-space: nowrap;
}
.status-pill.band-normal { background: var(--band-normal); }
.status-pill.band-watch { background: var(--band-watch); color: #4a3500; }
.status-pill.band-warning { background: var(--band-warning); color: #4d1d08; }
.status-pill.band-severe { background: var(--band-severe); }

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px 18px;
  margin: 0;
}
.detail-grid dt {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 2px;
}
.detail-grid dd {
  margin: 0;
  font-size: 14.5px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.detail-grid dd small { font-weight: 400; color: var(--text-secondary); }
.detail-notes {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--grid);
  font-size: 12.5px;
  color: var(--text-secondary);
}

/* ---------- alerts ---------- */
.alert-list { list-style: none; margin: 0; padding: 0; }
.alert-list li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 7px 0;
  border-bottom: 1px solid var(--grid);
  font-size: 12.5px;
  color: var(--text-secondary);
}
.alert-list li:last-child { border-bottom: 0; }
.alert-list .muted { color: var(--text-muted); }
.alert-badge {
  flex: none;
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 4px;
  padding: 2px 6px;
  color: #fff;
}
.alert-badge.band-normal { background: var(--band-normal); }
.alert-badge.band-watch { background: var(--band-watch); color: #4a3500; }
.alert-badge.band-warning { background: var(--band-warning); color: #4d1d08; }
.alert-badge.band-severe { background: var(--band-severe); }
.alert-time { margin-left: auto; flex: none; color: var(--text-muted); font-size: 11.5px; }

/* ---------- flood overlay ---------- */
.flood-overlay { image-rendering: auto; }
.flood-toggle {
  font: 600 12px system-ui, -apple-system, "Segoe UI", sans-serif;
  background: rgba(252, 252, 251, 0.95);
  color: #52514e;
  border: 1px solid rgba(11, 11, 11, 0.18);
  border-radius: 6px;
  padding: 6px 11px;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(11, 11, 11, 0.15);
}
.flood-toggle:hover { color: #0b0b0b; }
.flood-toggle.active {
  background: var(--series-1);
  border-color: var(--series-1);
  color: #fff;
}

/* ---------- map markers ---------- */
.well-marker { background: none; border: none; }
.marker-box { display: flex; align-items: flex-end; gap: 5px; filter: drop-shadow(0 1px 2px rgba(0,0,0,0.35)); }
.marker-bar {
  width: 12px;
  height: 42px;
  border-radius: 3px;
  background: rgba(252, 252, 251, 0.92);
  border: 1.5px solid #52514e;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
}
.marker-fill { width: 100%; border-radius: 1px 1px 0 0; }
.marker-fill.band-normal { background: var(--band-normal); }
.marker-fill.band-watch { background: var(--band-watch); }
.marker-fill.band-warning { background: var(--band-warning); }
.marker-fill.band-severe { background: var(--band-severe); }
.marker-label {
  background: rgba(252, 252, 251, 0.94);
  color: #0b0b0b;
  border: 1px solid rgba(11, 11, 11, 0.18);
  border-radius: 6px;
  padding: 2px 7px;
  font-size: 11px;
  font-weight: 650;
  line-height: 1.25;
  white-space: nowrap;
}
.marker-label small { display: block; font-weight: 500; color: #52514e; font-variant-numeric: tabular-nums; }
.well-marker.selected .marker-bar { border-color: var(--series-1); box-shadow: 0 0 0 2px var(--series-1); }
.well-marker.selected .marker-label { border-color: var(--series-1); box-shadow: 0 0 0 1.5px var(--series-1); }

/* ---------- login page ---------- */
.login-page {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 20px;
}
.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 8px 30px rgba(11, 11, 11, 0.08);
  padding: 32px;
}
.login-brand { text-align: center; margin-bottom: 24px; }
.login-mark { font-size: 34px; }
.login-card h1 { font-size: 18px; margin: 8px 0 4px; letter-spacing: -0.01em; }
.login-brand p { margin: 0; font-size: 12.5px; color: var(--text-muted); }
.login-card label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin: 14px 0 4px;
}
.login-card input {
  width: 100%;
  font: inherit;
  font-size: 14px;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--page);
  color: var(--text-primary);
}
.login-card input:focus { outline: 2px solid var(--series-1); outline-offset: -1px; border-color: transparent; }
.login-card button[type="submit"] {
  width: 100%;
  margin-top: 20px;
  font: inherit;
  font-size: 14px;
  font-weight: 650;
  padding: 10px;
  border: none;
  border-radius: 8px;
  background: var(--series-1);
  color: #fff;
  cursor: pointer;
}
.login-error { color: var(--band-severe); font-size: 12.5px; margin: 10px 0 0; }