:root {
  --bg: #f5f6f8; --card: #ffffff; --fg: #15191d; --muted: #5d6873; --line: #dfe3e8;
  --accent: #2563eb; --accent-fg: #ffffff; --bad: #b42318; --good-bg: #e8f5ec;
  --very-low: #9f1239; --low: #dc2626; --in-range: #15803d; --high: #d97706; --very-high: #c2410c;
  --band: rgba(21, 128, 61, 0.10); --grid: rgba(0, 0, 0, 0.07);
  --agp-outer: rgba(37, 99, 235, 0.12); --agp-inner: rgba(37, 99, 235, 0.28); --agp-median: #1d4ed8;
  --radius: 12px; --gap: 16px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1113; --card: #171b1f; --fg: #e7ebee; --muted: #98a4ae; --line: #2a3036;
    --accent: #6b9cff; --accent-fg: #0e1113; --bad: #ff8a80; --good-bg: #16281d;
    --very-low: #fb7185; --low: #f87171; --in-range: #4ade80; --high: #fbbf24; --very-high: #fb923c;
    --band: rgba(74, 222, 128, 0.10); --grid: rgba(255, 255, 255, 0.08);
    --agp-outer: rgba(107, 156, 255, 0.14); --agp-inner: rgba(107, 156, 255, 0.32); --agp-median: #93b4ff;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
h1 { font-size: 22px; margin: 0 0 12px; }
h2 { font-size: 17px; margin: 0 0 12px; }

header.top { background: var(--card); border-bottom: 1px solid var(--line); }
.top-row { display: flex; align-items: center; gap: 12px; padding: 10px 16px; max-width: 960px; margin: 0 auto; }
.brand { font-weight: 700; font-size: 18px; color: var(--fg); text-decoration: none; }
.top-row .spacer { flex: 1; }
.top-row form { margin: 0; display: flex; align-items: center; gap: 8px; }
.who { color: var(--muted); font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 220px; }
nav.tabs { display: flex; gap: 4px; padding: 0 12px; max-width: 960px; margin: 0 auto; overflow-x: auto; }
nav.tabs a { padding: 8px 10px; color: var(--muted); text-decoration: none; border-bottom: 2px solid transparent; white-space: nowrap; }
nav.tabs a.on { color: var(--fg); border-bottom-color: var(--accent); }

.viewing { display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap;
  padding: 10px 16px; border-radius: 10px; background: var(--good-bg); font-size: 14px; margin: 0; }
main { max-width: 960px; margin: 0 auto; padding: var(--gap); display: grid; gap: var(--gap); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; min-width: 0; }
.narrow { max-width: 440px; width: 100%; margin: 24px auto 0; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.error { color: var(--bad); margin: 0; }
.notice { background: var(--good-bg); border-radius: 8px; padding: 10px 12px; margin: 0; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.between { justify-content: space-between; }

label { display: block; font-size: 14px; color: var(--muted); margin: 12px 0 4px; }
input, select, button { font: inherit; }
input, select { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--fg); }
input[type=checkbox], input[type=radio] { width: auto; }
.top-row select { width: auto; padding: 6px 8px; }
button, .button { display: inline-block; padding: 10px 16px; border: 0; border-radius: 8px; background: var(--accent); color: var(--accent-fg); cursor: pointer; text-decoration: none; }
button.quiet { background: none; color: var(--muted); padding: 6px 0; }
button.danger { background: none; color: var(--bad); padding: 4px 0; }
.fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 0 12px; }
.check { display: flex; gap: 8px; align-items: center; color: var(--fg); margin: 6px 0; }
code.secret { display: block; word-break: break-all; padding: 10px 12px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; margin-top: 8px; user-select: all; }

.choices { display: flex; gap: 6px; flex-wrap: wrap; }
.choices a { padding: 4px 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); text-decoration: none; font-size: 14px; }
.choices a.on { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }

/* Current value */
.now { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.value { font-size: 72px; font-weight: 700; line-height: 1; font-variant-numeric: tabular-nums; }
.arrow { font-size: 48px; line-height: 1; }
.unit { color: var(--muted); font-size: 20px; }
.c-very_low { color: var(--very-low); } .c-low { color: var(--low); } .c-in_range { color: var(--in-range); }
.c-high { color: var(--high); } .c-very_high { color: var(--very-high); }
.stale .value, .stale .arrow { color: var(--muted); }
.stale-note { color: var(--muted); font-weight: 600; }

/* Stats */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 12px; }
.tile { border: 1px solid var(--line); border-radius: 10px; padding: 12px; }
.tile .k { font-size: 13px; color: var(--muted); }
.tile .v { font-size: 24px; font-weight: 650; font-variant-numeric: tabular-nums; }
.tir { display: flex; height: 22px; border-radius: 6px; overflow: hidden; background: var(--line); margin: 8px 0; }
.tir span { display: block; height: 100%; }
.b-very_low { background: var(--very-low); } .b-low { background: var(--low); } .b-in_range { background: var(--in-range); }
.b-high { background: var(--high); } .b-very_high { background: var(--very-high); }
.legend { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 4px 12px; font-size: 14px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 6px; }

table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 500; font-size: 13px; }
.scroll { overflow-x: auto; }

@media (max-width: 520px) {
  .who { display: none; }
  nav.tabs { padding: 0 6px; gap: 0; }
  nav.tabs a { padding: 8px 7px; font-size: 15px; }
  .value { font-size: 60px; }
}

.chart { width: 100%; min-height: 260px; }
.fields .wide { grid-column: 1 / -1; }
.food-form .fields { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.zoom { display: flex; gap: 4px; }
.zoom button { background: var(--bg); color: var(--fg); border: 1px solid var(--line); padding: 4px 10px; min-width: 36px; }
.chart .u-select { background: var(--agp-outer); }
.chart .u-legend { display: none; }
.chart .u-over { touch-action: pan-y; }
.chart-tip { position: absolute; pointer-events: none; background: var(--card); border: 1px solid var(--line); border-radius: 8px;
  padding: 6px 10px; font-size: 13px; line-height: 1.4; color: var(--muted); white-space: nowrap; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12); z-index: 2; }
.chart-tip-main { color: var(--fg); font-size: 16px; font-weight: 650; }
.chart-dot { position: absolute; width: 10px; height: 10px; margin: -5px 0 0 -5px; border-radius: 50%; border: 2px solid var(--card); pointer-events: none; z-index: 1; }
.empty { color: var(--muted); padding: 32px 0; text-align: center; }