:root{
  --bg:#0b0f12; --panel:#141b20; --line:#243038; --ink:#eaf6f5; --dim:#8fa3a6;
  --tiff:#0ABAB5; --tiff-d:#089a96; --good:#3ddc84; --bad:#ff5b6e; --warn:#ffcf5b;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,system-ui,"Segoe UI",Roboto,sans-serif;
  -webkit-tap-highlight-color:transparent;overscroll-behavior:none}
body{max-width:520px;margin:0 auto;min-height:100dvh}

.screen{display:none;padding:20px 18px calc(20px + env(safe-area-inset-bottom))}
.screen.active{display:block}
.hd{margin:6px 0 18px}
h1{font-size:34px;margin:0;font-weight:800;letter-spacing:-.5px}
h1 span{color:var(--tiff)}
h2{font-size:24px;margin:0}
.tag{color:var(--dim);font-size:14px;margin:6px 0 0;line-height:1.4}

.fld{display:block;margin:0 0 14px;font-size:13px;color:var(--dim);font-weight:600}
select{width:100%;margin-top:6px;padding:14px;border-radius:12px;border:1px solid var(--line);
  background:var(--panel);color:var(--ink);font-size:16px;appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%238fa3a6' d='M6 8 0 0h12z'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center}

button{font:inherit;border:none;border-radius:12px;padding:15px;font-size:16px;font-weight:700;cursor:pointer}
.primary{width:100%;background:var(--tiff);color:#00201f;margin-top:8px}
.primary:active{background:var(--tiff-d)}
.ghost{background:transparent;color:var(--dim);border:1px solid var(--line)}
.row{display:flex;gap:10px;margin-top:14px}
.row button{flex:1}

/* plan */
.day{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:14px;margin-bottom:12px}
.day h3{margin:0 0 4px;font-size:16px}
.day .focus{color:var(--tiff);font-size:12px;text-transform:capitalize;margin-bottom:10px}
.ex{display:flex;justify-content:space-between;padding:9px 0;border-top:1px solid var(--line);font-size:15px}
.ex .meta{color:var(--dim);font-size:13px}
.day .startBtn{width:100%;margin-top:12px;background:var(--tiff);color:#00201f}

/* workout camera */
#work.active{padding:0;display:flex;flex-direction:column;height:100dvh}
.cam-wrap{position:relative;flex:1;background:#000;overflow:hidden}
/* contain (not cover): show the WHOLE camera frame so the full body fits and
   the skeleton lines up exactly with the video (both scale by the same factor). */
#cam,#overlay{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
#cam{transform:scaleX(-1)}#overlay{transform:scaleX(-1)}
#hud{position:absolute;top:calc(14px + env(safe-area-inset-top));left:14px;right:14px;
  display:flex;flex-direction:column;gap:6px;pointer-events:none;text-shadow:0 1px 6px #000}
#exName{font-size:18px;font-weight:700}
#repBig{font-size:76px;font-weight:900;line-height:.95}
#repBig span{font-size:28px;color:var(--dim);font-weight:700}
#setInfo{font-size:14px;color:var(--dim)}
.chip{align-self:flex-start;background:#000a;border:1px solid var(--line);
  padding:6px 12px;border-radius:999px;font-size:13px;font-weight:600}
.chip.down{background:var(--tiff);color:#00201f;border-color:var(--tiff)}
.chip.rep{background:var(--good);color:#003317;border-color:var(--good)}
.chip.bad{background:var(--bad);color:#330008;border-color:var(--bad)}
.cue{position:absolute;bottom:14px;left:14px;right:14px;background:#000b;border:1px solid var(--line);
  border-radius:12px;padding:12px;font-size:13px;color:var(--dim);text-align:center}
.work-ctrls{padding:12px 14px calc(12px + env(safe-area-inset-bottom));background:var(--bg)}

/* music toggle */
.mbtn{position:absolute;top:calc(14px + env(safe-area-inset-top));right:14px;
  width:44px;height:44px;border-radius:50%;background:#000a;border:1px solid var(--line);
  color:var(--tiff);font-size:20px;line-height:1;padding:0;z-index:5}
.mbtn.off{color:var(--dim)}

/* rest overlay (over the live camera) */
.rest-ov{position:absolute;inset:0;z-index:4;display:none;flex-direction:column;
  align-items:center;justify-content:center;gap:6px;text-align:center;
  background:rgba(7,11,14,.82);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);padding:24px}
.rest-ov.show{display:flex}
.rest-verdict{color:var(--good);font-weight:800;font-size:15px;min-height:20px;margin-bottom:4px}
.rest-verdict.bad{color:var(--bad)}
.rest-lead{color:var(--dim);font-size:13px;letter-spacing:3px}
.rest-next{font-size:26px;font-weight:800;margin-bottom:8px}
.rest-num{font-size:104px;font-weight:900;line-height:1;color:var(--tiff)}
.rest-row{display:flex;gap:10px;margin-top:20px}
.rest-row button{min-width:120px}
#demoCanvas{margin:6px 0;filter:drop-shadow(0 2px 8px rgba(10,186,181,.4))}

/* history */
.hrec{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:10px}
.hrec-top{display:flex;justify-content:space-between;align-items:baseline;font-size:15px}
.hrec-top span{color:var(--dim);font-size:12px}
.hrec-stats{color:var(--tiff);font-size:13px;margin-top:4px}
.hrec-ex{color:var(--dim);font-size:12px;margin-top:6px;line-height:1.4}

/* complete */
#doneStats{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px;margin-bottom:16px}
#doneStats .line{display:flex;justify-content:space-between;padding:8px 0;border-top:1px solid var(--line);font-size:15px}
#doneStats .line:first-child{border-top:none}
#doneStats .line b{color:var(--tiff)}

/* summary */
#verdict{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px;text-align:center}
#verdict .big{font-size:56px;font-weight:900}
#verdict .badge{display:inline-block;margin-top:10px;padding:8px 16px;border-radius:999px;font-weight:800}
#verdict .badge.ok{background:var(--good);color:#003317}
#verdict .badge.no{background:var(--bad);color:#330008}
#verdict .flags{margin-top:12px;color:var(--warn);font-size:13px;text-align:left}
#verdict .flags li{margin:4px 0}