:root {
  color-scheme: dark;
  --bg: #111418;
  --panel: #1b2027;
  --line: #2c343e;
  --text: #f0f3f6;
  --muted: #9aa5b1;
  --accent: #4cc38a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 18px/1.4 system-ui, sans-serif;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

main { max-width: 28rem; margin: 0 auto; padding: 1rem; }

h1 { font-size: 1.1rem; font-weight: 600; color: var(--muted); margin: 0 0 1rem; }

.field { display: block; margin-bottom: 1rem; }
.field span, legend { display: block; font-size: 0.8rem; color: var(--muted); margin-bottom: 0.3rem; padding: 0; }

#weight {
  width: 100%;
  font: inherit;
  font-size: 2.5rem;
  font-weight: 600;
  text-align: center;
  padding: 0.4rem;
  color: var(--text);
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 12px;
}
#weight:focus { outline: none; border-color: var(--accent); }

fieldset.seg { display: flex; flex-wrap: wrap; gap: 0.5rem; border: 0; padding: 0; margin: 0 0 1rem; }
fieldset.seg legend { width: 100%; }
.seg label { flex: 1; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span {
  display: block;
  text-align: center;
  padding: 0.7rem 0.4rem;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 10px;
  font-size: 1rem;
  margin: 0;
  color: var(--text);
}
.seg input:checked + span { border-color: var(--accent); color: var(--accent); font-weight: 600; }
.seg input:focus-visible + span { outline: 2px solid var(--text); }

#message { color: var(--muted); text-align: center; margin: 1.5rem 0; }

#results { list-style: none; margin: 1.5rem 0 0; padding: 0; }
#results li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.8rem 1rem;
  margin-bottom: 0.5rem;
  background: var(--panel);
  border-radius: 10px;
  font-size: 1.4rem;
  font-variant-numeric: tabular-nums;
}
#results .reps { color: var(--muted); font-size: 1rem; }
#results li.working { border: 2px solid var(--accent); font-weight: 700; }
#results li.working .reps { color: var(--accent); }