:root {
  --bg: #0f1418;
  --surface: #171e24;
  --surface-2: #1e272e;
  --track: #2a343c;
  --text: #e8edf1;
  --muted: #8ea0ad;
  --line: #26313a;
  --accent: #34d0a8;
  --accent-2: #2f9be0;
  --carb: #f2a541;
  --protein: #34d0a8;
  --fat: #b98cf0;
  --danger: #ef5f6b;
  --warn: #f2a541;
  --ok: #34d0a8;
  --radius: 14px;
  --shadow: 0 1px 0 rgba(255,255,255,0.03), 0 8px 24px rgba(0,0,0,0.25);
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f3f6f8; --surface: #ffffff; --surface-2: #f7fafb; --track: #e4eaee;
    --text: #17242c; --muted: #5f7180; --line: #e4eaee; --shadow: 0 1px 2px rgba(20,40,60,0.06), 0 8px 24px rgba(20,40,60,0.08);
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
}
h1 { font-size: 24px; margin: 0 0 4px; font-weight: 600; }
h2 { font-size: 19px; margin: 0; font-weight: 600; }
h3 { font-size: 14px; margin: 0 0 12px; font-weight: 600; letter-spacing: .01em; color: var(--muted); text-transform: uppercase; }
.sub { color: var(--muted); margin: 0 0 20px; }
.hint { color: var(--muted); font-weight: 400; font-size: 12px; }

/* topbar */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px; border-bottom: 1px solid var(--line); background: var(--surface);
  position: sticky; top: 0; z-index: 5;
}
.brand { font-weight: 700; font-size: 18px; display: flex; align-items: center; gap: 8px; }
.brand-2 { color: var(--accent); }
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(52,208,168,.18); }
.user-switch { display: flex; gap: 8px; align-items: center; }

select, input, textarea {
  background: var(--surface-2); color: var(--text); border: 1px solid var(--line);
  border-radius: 10px; padding: 9px 11px; font: inherit; width: 100%;
}
select { cursor: pointer; }
.user-switch select { width: auto; min-width: 130px; }

button { font: inherit; cursor: pointer; border-radius: 10px; }
.btn-primary { background: var(--accent); color: #06231c; border: none; padding: 11px 20px; font-weight: 600; }
.btn-primary:hover { filter: brightness(1.06); }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid var(--line); padding: 8px 12px; }
.btn-ghost:hover { color: var(--text); border-color: var(--muted); }
.btn-ghost.danger:hover { color: var(--danger); border-color: var(--danger); }

/* onboarding */
.screen { max-width: 720px; margin: 40px auto; padding: 0 18px; }
.onboard.card { padding: 30px; }
form label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
form label input, form label select, form label textarea { margin-top: 5px; color: var(--text); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
fieldset { border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin: 18px 0; }
legend { padding: 0 8px; color: var(--muted); font-size: 13px; }
.unlock { max-width: 380px; margin: 60px auto; text-align: center; }
.brand.big { font-size: 26px; justify-content: center; margin-bottom: 6px; }
.pin-input { text-align: center; font-size: 32px; letter-spacing: 12px; padding: 14px; margin: 8px 0 4px; }
.unlock .form-actions { justify-content: center; }
.pin-msg { color: var(--danger); font-size: 13px; margin-top: 10px; }
.ht-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 5px; }
.race-row { display: grid; grid-template-columns: 2fr 1.3fr .8fr 1fr auto; gap: 8px; margin-bottom: 8px; align-items: center; }
.race-row input, .race-row select { width: 100%; }
.form-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 8px; }

/* dashboard */
.dash { max-width: 1080px; margin: 0 auto; padding: 22px; }
.dash-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 16px; flex-wrap: wrap; }
.src-note { color: var(--muted); font-size: 12px; margin-top: 4px; }
.race-chip { background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 8px 16px; font-size: 13px; }
.race-chip.muted { color: var(--muted); }
.race-chip .cd { color: var(--accent); font-weight: 600; }

.flags { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
.flag { padding: 10px 14px; border-radius: 10px; font-size: 13px; border-left: 3px solid; background: var(--surface); }
.flag.danger { border-color: var(--danger); }
.flag.warn { border-color: var(--warn); }
.flag.info { border-color: var(--accent-2); color: var(--muted); }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.card-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 16px; }
.card.wide { margin-bottom: 16px; }

/* charts */
.chart-donut { width: 180px; height: 180px; display: block; margin: 0 auto 10px; }
.seg-carb { stroke: var(--carb); } .seg-protein { stroke: var(--protein); } .seg-fat { stroke: var(--fat); }
.donut-num { font-size: 30px; font-weight: 700; fill: var(--text); }
.donut-lbl { font-size: 11px; fill: var(--muted); }
.macro-legend { display: flex; flex-direction: column; gap: 6px; }
.macro-legend span { display: flex; align-items: baseline; gap: 8px; font-size: 13px; }
.macro-legend b { margin-left: auto; }
.macro-legend small { color: var(--muted); min-width: 96px; text-align: right; }
.sw { width: 11px; height: 11px; border-radius: 3px; display: inline-block; }
.sw.carb { background: var(--carb); } .sw.protein { background: var(--protein); } .sw.fat { background: var(--fat); }
.sw.bar { background: var(--accent-2); } .sw.dot { background: var(--carb); border-radius: 50%; }

.chart-gauge { width: 200px; height: 130px; display: block; margin: 0 auto; }
.ea-danger { stroke: var(--danger); } .ea-warn { stroke: var(--warn); } .ea-ok { stroke: var(--ok); }
.gauge-needle { stroke: var(--text); stroke-width: 3; stroke-linecap: round; }
.gauge-hub { fill: var(--text); }
.gauge-num { font-size: 26px; font-weight: 700; fill: var(--text); }
.gauge-lbl { font-size: 10px; fill: var(--muted); }
.ea-status { text-align: center; font-weight: 600; margin-top: 6px; }
.ea-status.ok { color: var(--ok); } .ea-status.watch { color: var(--warn); }
.ea-status.warn { color: var(--warn); } .ea-status.danger { color: var(--danger); }
.ea-detail { text-align: center; color: var(--muted); font-size: 12px; margin-top: 6px; }

.hydro-card { text-align: center; }
.chart-hydro { width: 140px; height: 140px; margin: 0 auto 12px; }
.hydro-arc { stroke: var(--accent-2); transition: stroke-dashoffset .3s ease; }
.hydro-num { font-size: 22px; font-weight: 700; fill: var(--text); }
.hydro-lbl { font-size: 11px; fill: var(--muted); }
.glasses { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 10px; }
.glass { width: 22px; height: 30px; border-radius: 3px 3px 6px 6px; border: 2px solid var(--accent-2); background: transparent; padding: 0; transition: background .15s; }
.glass.on { background: var(--accent-2); }

.chart-week { width: 100%; height: auto; display: block; margin-bottom: 8px; }
.bar { fill: var(--track); } .bar-today { fill: var(--accent-2); }
.carb-dot { fill: var(--carb); } .carb-line { stroke: var(--carb); stroke-width: 1.5; stroke-dasharray: 3 3; opacity: .7; }
.axis-lbl { font-size: 11px; fill: var(--muted); } .axis-today { fill: var(--text); font-weight: 600; }
.lgd { font-size: 11px; color: var(--muted); text-transform: none; font-weight: 400; margin-left: 10px; }
.lgd .sw { margin-right: 4px; vertical-align: middle; }
.explain { color: var(--muted); font-size: 12px; margin: 4px 0 0; }

.timing { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.t-col { background: var(--surface-2); border-radius: 10px; padding: 12px 14px; }
.t-h { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--accent); font-weight: 600; }
.t-col p { margin: 6px 0 0; font-size: 13px; }
.micro { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }

/* food logging */
.fbars { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; margin-bottom: 16px; }
.fbar-top { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 4px; }
.fbar-track { height: 8px; background: var(--track); border-radius: 5px; overflow: hidden; }
.fbar-fill { height: 100%; border-radius: 5px; transition: width .3s; }
.fbar-fill.f-cal { background: var(--text); } .fbar-fill.f-carb { background: var(--carb); }
.fbar-fill.f-protein { background: var(--protein); } .fbar-fill.f-fat { background: var(--fat); }
.flist { list-style: none; padding: 0; margin: 0 0 14px; }
.fitem { display: flex; align-items: center; gap: 10px; padding: 9px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.fitem.empty { color: var(--muted); justify-content: center; border: none; }
.fi-name { flex: 1; } .fi-name small { color: var(--muted); margin-left: 6px; }
.fi-macros { color: var(--muted); font-size: 12px; }
.fi-del { background: none; border: none; color: var(--muted); cursor: pointer; padding: 4px 8px; }
.fi-del:hover { color: var(--danger); }
.fadd { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.fadd #fQuery { flex: 1; min-width: 180px; }
.fadd .btn-primary i { font-style: normal; margin-right: 4px; }
.fresult, .fpick { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 10px; border: 1px solid var(--line); border-radius: 10px; margin-top: 8px; }
.fresult small, .fpick small { display: block; color: var(--muted); font-size: 12px; }
.fpick { flex-direction: column; align-items: stretch; }
.fpick-row { display: flex; gap: 16px; align-items: flex-end; margin: 10px 0; }
.fpick-macros { color: var(--muted); font-size: 13px; padding-bottom: 8px; }
.scan-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.8); display: flex; align-items: center; justify-content: center; z-index: 50; }
.scan-box { background: var(--surface); border-radius: 14px; padding: 16px; width: min(92vw, 420px); }
.scan-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
#reader { width: 100%; }
.scan-msg { color: var(--muted); font-size: 13px; margin-top: 10px; text-align: center; }

@media (max-width: 820px) {
  .fbars { grid-template-columns: 1fr; }
  .card-row { grid-template-columns: 1fr; }
  .timing { grid-template-columns: 1fr; }
  .grid2 { grid-template-columns: 1fr; }
  .race-row { grid-template-columns: 1fr 1fr; }
}