:root {
  color-scheme: light dark;
  --bg: #0b0d10;
  --card: #16191d;
  --text: #f2f2f2;
  --muted: #9aa1a9;
  --accent: #4f8cff;
  --border: #2a2e34;
  --danger: #ff6464;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f6f8;
    --card: #ffffff;
    --text: #16191d;
    --muted: #5b6470;
    --accent: #2f6fed;
    --border: #e3e5e8;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding-bottom: 72px;
}

header {
  padding: 20px 16px 8px;
}
header h1 { font-size: 20px; margin: 0 0 4px; }
header p { margin: 0; color: var(--muted); font-size: 13px; }

main { padding: 8px 16px 24px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 12px;
}

.row { display: flex; align-items: center; gap: 8px; }
.row.wrap { flex-wrap: wrap; }
.between { justify-content: space-between; }

select, input[type=number], input[type=text] {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 15px;
  width: 100%;
}

.rep-box {
  width: 44px;
  text-align: center;
  padding: 8px 4px;
}

label { font-size: 12px; color: var(--muted); display: block; margin-bottom: 4px; }

button {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
}
button.secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
button:active { opacity: 0.8; }

.exercise-name { font-weight: 600; margin-bottom: 2px; }
.target-text { color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.actual-text { color: var(--accent); font-size: 12px; margin-top: 6px; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 6px 4px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; }

.metric-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.metric-grid .card { margin-bottom: 0; }
.metric-label { font-size: 12px; color: var(--muted); }
.metric-value { font-size: 22px; font-weight: 700; }

nav.tabbar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  display: flex;
  background: var(--card);
  border-top: 1px solid var(--border);
  padding: 6px 6px calc(6px + env(safe-area-inset-bottom));
}
nav.tabbar button {
  flex: 1;
  background: transparent;
  color: var(--muted);
  font-weight: 500;
  padding: 8px 4px;
}
nav.tabbar button.active { color: var(--accent); }

.hidden { display: none !important; }
.toast {
  position: fixed; top: 16px; left: 50%; transform: translateX(-50%);
  background: var(--accent); color: white; padding: 10px 16px; border-radius: 8px;
  font-size: 13px; z-index: 50;
}
.error { color: var(--danger); font-size: 13px; }

.gate {
  position: fixed; inset: 0; background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  padding: 24px; z-index: 100;
}
.gate .card { width: 100%; max-width: 320px; }