:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --series-1: #2a78d6;
  --series-2: #eb6834;
  --series-3: #1baf7a;
  --good: #006300;
  --bad: #b42d2d;
  --critical: #d03b3b;            /* status colour, the same in both modes */
  --accent-wash: rgba(42, 120, 214, 0.10);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #f0efec;
    --ink-2: #c3c2b7;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --series-1: #3987e5;
    --series-2: #d95926;
    --series-3: #199e70;
    --good: #0ca30c;
    --bad: #e66767;
    --accent-wash: rgba(57, 135, 229, 0.14);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --ink: #f0efec;
  --ink-2: #c3c2b7;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --series-1: #3987e5;
  --series-2: #d95926;
  --series-3: #199e70;
  --good: #0ca30c;
  --bad: #e66767;
  --accent-wash: rgba(57, 135, 229, 0.14);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
}
main { max-width: 860px; margin: 0 auto; padding: 16px 16px 48px; }
header { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
h1 { font-size: 1.5rem; margin: 8px 0; }
h2 { font-size: 1rem; margin: 0 0 12px; font-weight: 600; }
h2 .muted { font-weight: 400; font-size: 0.875rem; }
.muted { color: var(--muted); }
.login { max-width: 360px; padding-top: 20vh; display: grid; gap: 16px; justify-items: start; }
.signout { font-size: 0.875rem; color: var(--ink-2); }
p { margin: 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin: 12px 0;
}

form { display: grid; gap: 12px; }
.row { display: flex; gap: 8px; align-items: end; flex-wrap: wrap; }
.grow { flex: 1 1 120px; }
label { display: grid; gap: 4px; font-size: 0.875rem; color: var(--ink-2); }
input[type="date"], input[type="number"], input[type="text"] {
  font: inherit; color: var(--ink); background: var(--page);
  border: 1px solid var(--axis); border-radius: 8px; padding: 8px 10px; min-height: 44px; width: 100%;
}
input[type="file"] { font: inherit; color: var(--ink-2); flex: 1 1 200px; min-width: 0; }
button {
  font: inherit; font-weight: 600; min-height: 44px; padding: 8px 16px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--series-1); background: var(--series-1); color: #fff;
}
button.quiet { background: transparent; color: var(--ink); border-color: var(--axis); }
button:disabled { opacity: 0.5; cursor: default; }
:focus-visible { outline: 2px solid var(--series-1); outline-offset: 2px; }
.total { font-size: 1.5rem; font-weight: 600; margin: 4px 0 8px; }
.day { flex: 0 0 auto; }
.wide { flex-basis: 100%; }
.num { flex: 1 1 90px; }
.foods { list-style: none; margin: 0 0 12px; padding: 0; font-size: 0.9375rem; }
.foods li { display: flex; gap: 8px; align-items: center; padding: 6px 0; border-bottom: 1px solid var(--grid); }
.foods li:last-child { border-bottom: 0; }
.foods .what { flex: 1; min-width: 0; }
.foods .what small { display: block; color: var(--muted); font-size: 0.8125rem; }
.subtotal { color: var(--ink-2); margin: -4px 0 8px; font-variant-numeric: tabular-nums; }
.key-1 { --c: var(--series-1); }
.key-2 { --c: var(--series-2); }
.reading ul { padding-left: 20px; margin: 8px 0; }
.reading li { margin: 6px 0; }
.reading h3 { font-size: 0.9375rem; margin: 16px 0 4px; }
.reading a { color: var(--series-1); }
.alert { border-color: var(--critical); border-width: 2px; }
.alert .icon { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--critical); color: #fff; font-size: 0.875rem; margin-right: 6px; }
.foods .time { color: var(--muted); font-variant-numeric: tabular-nums; }
.foods .fig { color: var(--ink-2); font-variant-numeric: tabular-nums; white-space: nowrap; }
.foods button { min-height: 32px; padding: 0 10px; background: transparent; color: var(--muted); border-color: transparent; font-weight: 400; }
.foods button:hover { color: var(--bad); border-color: var(--axis); }
.foods .empty { color: var(--muted); }
.total .muted { font-size: 0.875rem; font-weight: 400; }
.msg { min-height: 1.45em; font-size: 0.875rem; color: var(--ink-2); }
.msg.error { color: var(--bad); }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin: 12px 0; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; }
.tile .label { font-size: 0.875rem; color: var(--ink-2); }
.tile .value { font-size: 1.75rem; font-weight: 600; line-height: 1.2; margin-top: 4px; }
.tile .value small { font-size: 0.875rem; font-weight: 400; color: var(--ink-2); }
.tile .sub { font-size: 0.8125rem; color: var(--muted); margin-top: 2px; }
.tile .good { color: var(--good); }
.tile .bad { color: var(--bad); }

.ranges { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0 4px; }
.ranges button { background: transparent; color: var(--ink); border-color: var(--axis); font-weight: 400; min-height: 36px; padding: 4px 12px; }
.ranges button[aria-pressed="true"] { background: var(--accent-wash); border-color: var(--series-1); font-weight: 600; }

.chart { position: relative; width: 100%; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart text { font-size: 12px; fill: var(--muted); font-variant-numeric: tabular-nums; }
.chart .label { fill: var(--ink-2); }
.chart .grid { stroke: var(--grid); stroke-width: 1; }
.chart .base { stroke: var(--axis); stroke-width: 1; }
.chart .empty { fill: var(--muted); font-size: 14px; }
.chart .hit { touch-action: pan-y; }

.legend { display: flex; gap: 16px; flex-wrap: wrap; font-size: 0.875rem; color: var(--ink-2); margin: -4px 0 8px; }
.legend span::before { content: ""; display: inline-block; width: 14px; height: 3px; border-radius: 2px; margin-right: 6px; vertical-align: middle; background: var(--c); }

.tip {
  position: fixed; z-index: 10; pointer-events: none;
  background: var(--surface); color: var(--ink); border: 1px solid var(--border); border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15); padding: 8px 10px; font-size: 0.8125rem; line-height: 1.4; white-space: nowrap;
}
.tip b { font-weight: 600; }
.tip .k { color: var(--ink-2); }

.table-wrap { overflow-x: auto; margin-top: 12px; }
table { border-collapse: collapse; width: 100%; font-size: 0.875rem; font-variant-numeric: tabular-nums; }
th, td { text-align: right; padding: 6px 8px; border-bottom: 1px solid var(--grid); }
th:first-child, td:first-child, th:last-child, td:last-child { text-align: left; }
th { color: var(--ink-2); font-weight: 600; }
summary { cursor: pointer; font-weight: 600; }