:root {
  --bg: #0d1b2a;
  --bg-2: #13263c;
  --card: #1b3a5b;
  --accent: #ff9f1c;
  --accent-2: #ffbf69;
  --text: #e8f1f8;
  --muted: #8fa8bf;
  --good: #2ec4b6;
  --bad: #e63946;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

button { font-family: inherit; }

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-2);
}

header h1 { font-size: 1.2rem; letter-spacing: 0.5px; }

.badge {
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--card);
  color: var(--muted);
}
.badge.paid { background: var(--accent); color: #1a1206; font-weight: 700; }

main { flex: 1; padding: 16px; }

.hidden { display: none !important; }

.tagline { color: var(--muted); margin-bottom: 16px; }
.muted { color: var(--muted); font-size: 0.85rem; }

/* ---------- Home: exercise picker ---------- */
.exercise-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.ex-card {
  background: var(--card);
  border: none;
  border-radius: 14px;
  padding: 20px 14px;
  color: var(--text);
  text-align: left;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 110px;
}

.ex-card h3 { font-size: 1rem; }
.ex-card .tag { font-size: 0.72rem; color: var(--good); font-weight: 700; }
.ex-card .tag.locked { color: var(--accent-2); }
.ex-card.locked { opacity: 0.55; cursor: not-allowed; }

/* ---------- Goal picker ---------- */
#goal-picker h2 { margin-bottom: 6px; }
#goal-picker .muted { margin-bottom: 16px; }

.chip-row { display: flex; flex-wrap: wrap; gap: 10px; }

.chip {
  background: var(--card);
  border: 2px solid transparent;
  color: var(--text);
  border-radius: 999px;
  padding: 14px 22px;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
}
.chip:active { border-color: var(--accent); }

/* ---------- Camera stage ---------- */
#camera-stage { display: flex; flex-direction: column; gap: 10px; padding: 0; }

.cam-top {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
}

#cam-exit {
  background: var(--bg-2);
  color: var(--text);
  border: none;
  border-radius: 10px;
  font-size: 1.1rem;
  padding: 8px 14px;
  cursor: pointer;
}

#goal-pill {
  background: var(--bg-2);
  color: var(--accent);
  font-weight: 800;
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.95rem;
}

.spacer { flex: 1; }

.cam-view {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  background: #000;
  aspect-ratio: 3 / 4;
}

#camera-feed, #skeleton-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* loading overlay */
#loading-overlay {
  position: absolute;
  inset: 0;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  text-align: center;
  padding: 20px;
  z-index: 5;
}
#loading-overlay.done { display: none; }
#loading-overlay p { color: var(--muted); font-size: 0.95rem; }

.spinner {
  width: 44px;
  height: 44px;
  border: 4px solid var(--card);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

#load-retry {
  background: var(--accent);
  color: #1a1206;
  border: none;
  border-radius: 10px;
  padding: 10px 18px;
  font-weight: 700;
  cursor: pointer;
}

/* HUD */
#hud {
  position: absolute;
  top: 12px;
  left: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 3;
}

#rep-count {
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent);
  text-shadow: 0 2px 10px rgba(0,0,0,0.8);
  line-height: 1;
}

#form-score {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--good);
  text-shadow: 0 1px 6px rgba(0,0,0,0.8);
}

/* cue banner */
#cue-banner {
  position: absolute;
  bottom: 14px;
  left: 12px;
  right: 12px;
  background: rgba(19, 38, 60, 0.92);
  color: var(--accent-2);
  font-weight: 700;
  border-radius: 12px;
  padding: 12px 14px;
  text-align: center;
  z-index: 3;
}

/* status chip */
#status-chip {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(230, 57, 70, 0.92);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 999px;
  padding: 6px 12px;
  max-width: 55%;
  z-index: 3;
}

/* bottom controls */
.cam-controls {
  display: flex;
  gap: 12px;
  padding: 0 4px 8px;
}

.cam-controls button {
  flex: 1;
  padding: 16px;
  border: none;
  border-radius: 12px;
  font-size: 1.05rem;
  font-weight: 800;
  cursor: pointer;
}

#btn-pause { background: var(--card); color: var(--text); }
#btn-pause.paused { background: var(--accent); color: #1a1206; }
#btn-end { background: var(--bad); color: #fff; }

/* ---------- Unlock screen ---------- */
#unlock-screen h2 { margin-bottom: 10px; }

.device-code {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--accent);
  background: var(--bg-2);
  border: 1px dashed var(--muted);
  border-radius: 10px;
  padding: 12px;
  margin: 12px 0;
  text-align: center;
  user-select: all;
}

.steps { margin: 12px 0 16px 18px; color: var(--muted); font-size: 0.9rem; }
.steps li { margin-bottom: 6px; }

#license-key-input {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--muted);
  background: var(--bg-2);
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 10px;
}

#activate-btn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #1a1206;
  font-weight: 800;
  font-size: 1rem;
  cursor: pointer;
}

#activate-msg { margin-top: 8px; font-size: 0.9rem; min-height: 1.2em; }
#activate-msg.ok { color: var(--good); }
#activate-msg.err { color: var(--bad); }

.link-btn {
  background: none;
  border: none;
  color: var(--accent-2);
  cursor: pointer;
  font-size: 0.9rem;
  margin-top: 10px;
  text-align: left;
}
.link-btn.danger { color: var(--bad); display: block; }

/* ---------- Data controls ---------- */
.data-controls {
  margin-top: 20px;
  background: var(--bg-2);
  border-radius: 12px;
  padding: 14px;
}
.data-controls h4 { font-size: 0.9rem; margin-bottom: 4px; }
.data-controls .muted { margin-bottom: 6px; }

/* ---------- Summary ---------- */
#summary-stats {
  background: var(--card);
  border-radius: 14px;
  padding: 16px;
  display: grid;
  gap: 10px;
  margin: 12px 0;
}

#summary-stats .row {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
}
#summary-stats .row b { color: var(--accent); }

#summary-title.win { color: var(--good); }

footer {
  display: flex;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-2);
}

#error-msg {
  color: var(--bad);
  background: var(--bg-2);
  border-radius: 10px;
  padding: 10px;
  margin-top: 12px;
  font-size: 0.9rem;
}