:root {
  --bg: #0B0D10;
  --surface: #15181D;
  --raised: #1E2229;
  --border: #262B33;
  --text: #F5F7FA;
  --text2: #9AA3AF;
  --muted: #6B7280;
  --primary: #C8FF3D;
  --on-primary: #0B0D10;
  --danger: #F87171;
  --gold: #FACC15;
  --r: 16px;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body {
  font-family: 'Heebo', system-ui, -apple-system, sans-serif;
  font-size: 16px; line-height: 1.4;
  min-height: 100dvh;
  padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom);
}
button, input { font: inherit; color: inherit; }
button { cursor: pointer; border: 0; background: none; }

#app { max-width: 520px; margin: 0 auto; padding: 16px 16px 40px; }

/* header */
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 22px; letter-spacing: .2px; }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.brand b { color: var(--primary); font-weight: 800; }
.who { display: flex; background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 3px; }
.who button { padding: 7px 14px; border-radius: 999px; color: var(--text2); font-weight: 500; font-size: 15px; }
.who button.on { background: var(--primary); color: var(--on-primary); font-weight: 700; }

/* search */
.search { position: relative; margin-bottom: 18px; }
.search input {
  width: 100%; padding: 14px 16px; border-radius: var(--r);
  background: var(--surface); border: 1px solid var(--border); outline: none; font-size: 16px;
}
.search input:focus { border-color: var(--primary); }

h2 { font-size: 14px; font-weight: 500; color: var(--text2); margin: 22px 4px 8px; }

.list { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; }
.row {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  width: 100%; padding: 14px 16px; text-align: start; border-top: 1px solid var(--border);
}
.row:first-child { border-top: 0; }
.row:active { background: var(--raised); }
.row .name { font-weight: 500; }
.row .sub { font-size: 14px; color: var(--text2); margin-top: 2px; }
.row .val { font-weight: 700; white-space: nowrap; }
.row .chev { color: var(--muted); font-size: 20px; }
.row.add .name { color: var(--primary); font-weight: 700; }
.empty { color: var(--muted); text-align: center; padding: 26px 10px; font-size: 15px; }

/* exercise screen */
.back { display: inline-flex; align-items: center; gap: 6px; color: var(--text2); padding: 6px 0; margin-bottom: 6px; font-size: 16px; }
.title { font-size: 26px; font-weight: 800; margin: 0 0 4px; }
.meta { color: var(--text2); font-size: 15px; margin-bottom: 18px; }
.meta .best { color: var(--gold); font-weight: 700; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 18px; }
.steppers { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 16px; }
.stepper { background: var(--raised); border-radius: var(--r); padding: 10px 8px 12px; text-align: center; }
.stepper label { display: block; font-size: 13px; color: var(--text2); margin-bottom: 6px; }
.stepper .ctl { display: flex; align-items: center; justify-content: space-between; gap: 4px; }
.stepper button {
  width: 42px; height: 42px; border-radius: 12px; background: var(--surface);
  font-size: 24px; font-weight: 500; line-height: 1; flex: none;
}
.stepper button:active { background: var(--border); }
.stepper input {
  width: 100%; min-width: 0; text-align: center; background: none; border: 0; outline: none;
  font-size: 30px; font-weight: 800; padding: 0; direction: ltr;
}
.primary {
  width: 100%; padding: 16px; border-radius: var(--r); background: var(--primary); color: var(--on-primary);
  font-weight: 800; font-size: 18px;
}
.primary:active { transform: scale(.98); }
.primary:disabled { opacity: .5; }

.day { margin-top: 22px; }
.day h3 { font-size: 14px; color: var(--text2); font-weight: 500; margin: 0 4px 8px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 8px 12px; font-weight: 700;
}
.chip small { color: var(--text2); font-weight: 400; }
.chip.pr { border-color: var(--gold); }
.hint { color: var(--muted); font-size: 13px; text-align: center; margin-top: 26px; }

/* login */
.login { text-align: center; padding-top: 12vh; }
.login img { width: 84px; height: 84px; border-radius: 22px; }
.login h1 { font-size: 30px; margin: 14px 0 4px; font-weight: 800; }
.login p { color: var(--text2); margin: 0 0 28px; }
.pick { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 14px; }
.pick button {
  padding: 22px 10px; border-radius: 20px; background: var(--surface); border: 2px solid var(--border);
  font-size: 20px; font-weight: 700;
}
.pick button.on { border-color: var(--primary); color: var(--primary); }
.login input {
  width: 100%; padding: 15px; border-radius: var(--r); background: var(--surface);
  border: 1px solid var(--border); outline: none; text-align: center; font-size: 18px; margin-bottom: 14px;
}
.err { color: var(--danger); min-height: 22px; font-size: 15px; }

#toast {
  position: fixed; inset-inline: 0; bottom: calc(24px + env(safe-area-inset-bottom)); margin: 0 auto;
  width: max-content; max-width: 90vw; background: var(--text); color: var(--bg);
  padding: 10px 18px; border-radius: 999px; font-weight: 700; font-size: 15px;
  opacity: 0; transform: translateY(10px); transition: .2s; pointer-events: none;
}
#toast.show { opacity: 1; transform: none; }

.loading { color: var(--muted); text-align: center; padding: 40px; }