:root{
  --bg:#0f1117;--bg2:#161a24;--card:#1c2130;--card2:#232a3b;--line:#2b3348;
  --tx:#eef1f7;--tx2:#9aa3b8;--tx3:#6b7389;
  --acc:#4ade80;--acc2:#22c55e;--accd:#14532d;
  --warn:#fbbf24;--bad:#f87171;--info:#60a5fa;
  --r:14px;--sh:0 6px 20px rgba(0,0,0,.35);
  --sat:env(safe-area-inset-top,0px);--sab:env(safe-area-inset-bottom,0px);
  --tab-h:64px;
}
@media (prefers-color-scheme:light){
  :root:not([data-theme="dark"]){
    --bg:#f4f6fb;--bg2:#ffffff;--card:#ffffff;--card2:#eef1f7;--line:#dde2ee;
    --tx:#121726;--tx2:#4b5367;--tx3:#8a92a8;--accd:#dcfce7;--sh:0 6px 20px rgba(20,30,60,.10);
  }
}
:root[data-theme="light"]{
  --bg:#f4f6fb;--bg2:#ffffff;--card:#ffffff;--card2:#eef1f7;--line:#dde2ee;
  --tx:#121726;--tx2:#4b5367;--tx3:#8a92a8;--accd:#dcfce7;--sh:0 6px 20px rgba(20,30,60,.10);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;background:var(--bg);color:var(--tx);font:16px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;overscroll-behavior-y:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select{font:inherit;color:inherit}
h1,h2,h3{margin:0;line-height:1.2}
#app{display:flex;flex-direction:column;min-height:100dvh}

.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:8px;padding:calc(10px + var(--sat)) 16px 10px;background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.topbar h1{font-size:1.15rem;font-weight:700;flex:1;letter-spacing:.02em}
.icon-btn{width:38px;height:38px;border-radius:50%;background:var(--card);font-size:1.4rem;display:grid;place-items:center}
.hr-badge{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:4px 10px;font-size:.85rem;color:var(--bad)}
.hr-badge b{color:var(--tx)}

.view{flex:1;padding:16px 16px calc(var(--tab-h) + var(--sab) + 16px);max-width:720px;width:100%;margin:0 auto}
@media (min-width:900px){.view{max-width:960px}}

.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:20;display:flex;justify-content:space-around;height:calc(var(--tab-h) + var(--sab));padding-bottom:var(--sab);background:var(--bg2);border-top:1px solid var(--line)}
.tab{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:.7rem;color:var(--tx3)}
.tab .ico{font-size:1.25rem}
.tab.active{color:var(--acc)}
.tab-main .ico{background:var(--acc);color:#052e16;width:40px;height:40px;border-radius:50%;display:grid;place-items:center;font-size:1.1rem;margin-top:-18px;box-shadow:0 4px 14px rgba(74,222,128,.4)}
@media (min-width:900px){
  .tabbar{top:0;bottom:auto;left:auto;right:0;height:auto;width:auto;flex-direction:row;background:transparent;border:0;padding:calc(8px + var(--sat)) 12px 0}
  .tab{flex:0 0 auto;flex-direction:row;padding:6px 12px;border-radius:20px;font-size:.85rem}
  .tab .ico{font-size:1rem}
  .tab-main .ico{width:28px;height:28px;margin:0;font-size:.8rem}
  .topbar{padding-right:420px}
}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;margin-bottom:12px;box-shadow:var(--sh)}
.card h2{font-size:1.05rem;margin-bottom:8px}
.card.muted{color:var(--tx2)}
.row{display:flex;align-items:center;gap:10px}
.row.between{justify-content:space-between}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.stack{display:flex;flex-direction:column;gap:10px}
.small{font-size:.82rem;color:var(--tx2)}
.tiny{font-size:.72rem;color:var(--tx3)}
.label{font-size:.78rem;color:var(--tx2);margin-bottom:4px;display:block;text-transform:uppercase;letter-spacing:.06em}
.chip{display:inline-block;padding:3px 10px;border-radius:20px;background:var(--card2);font-size:.75rem;color:var(--tx2);margin:2px 4px 2px 0}
.chip.acc{background:var(--accd);color:var(--acc)}
.badge{padding:2px 8px;border-radius:8px;font-size:.72rem;background:var(--card2);color:var(--tx2)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;border-radius:12px;background:var(--card2);font-weight:600;min-height:48px;transition:transform .08s}
.btn:active{transform:scale(.97)}
.btn.primary{background:var(--acc);color:#052e16}
.btn.danger{background:var(--bad);color:#fff}
.btn.ghost{background:transparent;border:1px solid var(--line)}
.btn.block{width:100%}
.btn.big{font-size:1.15rem;min-height:60px}
.btn:disabled{opacity:.45}

.field{margin-bottom:14px}
.field input[type=number],.field input[type=text],.field input[type=password],.field select{width:100%;padding:12px;border-radius:10px;border:1px solid var(--line);background:var(--bg2);min-height:48px}
.seg{display:flex;background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:3px;gap:3px;flex-wrap:wrap}
.seg button{flex:1;padding:10px 6px;border-radius:9px;color:var(--tx2);font-size:.9rem;min-height:44px;white-space:nowrap}
.seg button.on{background:var(--acc);color:#052e16;font-weight:700}
.slider{width:100%;accent-color:var(--acc)}
.toggle{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}
.toggle:last-child{border-bottom:0}
.switch{position:relative;width:48px;height:28px;background:var(--line);border-radius:14px;flex:none}
.switch::after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;background:#fff;border-radius:50%;transition:.15s}
.switch.on{background:var(--acc)}
.switch.on::after{left:23px}

.ex-item{display:flex;gap:12px;align-items:center;padding:10px;border-radius:12px;background:var(--card);border:1px solid var(--line);margin-bottom:8px}
.ex-thumb{width:64px;height:64px;flex:none;border-radius:10px;background:var(--card2);display:grid;place-items:center;overflow:hidden}
.ex-thumb svg{width:100%;height:100%}
.ex-item .name{font-weight:600}
.ex-item .meta{font-size:.78rem;color:var(--tx2)}
.ex-item.done{opacity:.55}
.ex-item.current{border-color:var(--acc);box-shadow:0 0 0 2px var(--accd)}

.day-card{border-left:4px solid var(--acc)}
.day-card.rest{border-left-color:var(--tx3)}
.day-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}

.sheet{position:fixed;inset:0;z-index:50}
.sheet-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.55)}
.sheet-panel{position:absolute;left:0;right:0;bottom:0;max-height:92dvh;overflow:auto;background:var(--bg2);border-radius:20px 20px 0 0;padding:8px 16px calc(20px + var(--sab));animation:up .22s ease-out}
.sheet-handle{width:40px;height:4px;border-radius:2px;background:var(--line);margin:4px auto 14px}
@media (min-width:900px){.sheet-panel{left:50%;right:auto;bottom:auto;top:50%;transform:translate(-50%,-50%);width:640px;border-radius:20px;max-height:86vh}}
@keyframes up{from{transform:translateY(40px);opacity:0}to{transform:none;opacity:1}}
.anim-box{width:100%;aspect-ratio:16/10;background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;display:grid;place-items:center;margin:8px 0 14px}
.anim-box svg{width:100%;height:100%}
.steps{padding-left:18px;margin:6px 0}
.steps li{margin-bottom:6px;color:var(--tx2)}
.var-list{display:flex;flex-direction:column;gap:8px}
.var-item{padding:10px 12px;border-radius:10px;background:var(--card);border:1px solid var(--line)}
.var-item b{display:block}
.var-item span{font-size:.8rem;color:var(--tx2)}

.toast{position:fixed;left:50%;bottom:calc(var(--tab-h) + var(--sab) + 16px);transform:translateX(-50%);background:var(--tx);color:var(--bg);padding:10px 16px;border-radius:10px;z-index:60;font-size:.9rem;box-shadow:var(--sh);max-width:90vw}

/* Training mode */
.train-hero{text-align:center;padding:10px 0 4px}
.timer{font-variant-numeric:tabular-nums;font-size:3.6rem;font-weight:800;letter-spacing:-.02em;line-height:1}
.timer.rest{color:var(--warn)}
.timer.over{color:var(--bad);animation:blink .8s infinite}
@keyframes blink{50%{opacity:.35}}
.timer-sub{color:var(--tx2);font-size:.9rem;margin-top:4px}
.ring{position:relative;width:min(70vw,260px);margin:10px auto}
.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring .in{position:absolute;inset:0;display:grid;place-items:center;text-align:center}
.set-dots{display:flex;gap:6px;justify-content:center;margin:8px 0}
.set-dots i{width:12px;height:12px;border-radius:50%;background:var(--line)}
.set-dots i.done{background:var(--acc)}
.set-dots i.now{background:var(--warn)}
.logrow{display:grid;grid-template-columns:1fr 1fr auto;gap:8px;align-items:end;margin-top:10px}
.logrow input{width:100%;padding:12px;border-radius:10px;border:1px solid var(--line);background:var(--bg2);text-align:center;font-size:1.2rem;font-weight:700;min-height:52px}
.stat{text-align:center;padding:10px;background:var(--card2);border-radius:10px}
.stat b{display:block;font-size:1.4rem}
.stat span{font-size:.72rem;color:var(--tx2)}
.progress{height:6px;border-radius:3px;background:var(--line);overflow:hidden}
.progress i{display:block;height:100%;background:var(--acc)}
.hidden,[hidden]{display:none!important}
.muscle-map{width:100%;max-width:300px;margin:0 auto;display:block}
/* Fotos de ejercicio: dos fotogramas (inicio/fin) con fundido.
   Las fotos tienen proporciones distintas (3:2, 1:1…): se muestran completas sobre un fondo
   con la misma foto difuminada, así el recuadro siempre queda lleno y uniforme. */
.photo{position:relative;width:100%;height:100%;background:#111;overflow:hidden}
.photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center}
.photo .bg{object-fit:cover;filter:blur(16px) saturate(1.2) brightness(.7);transform:scale(1.15)}
.photo.thumb img{object-fit:cover}
.photo.thumb .bg{display:none}
.photo .f2{opacity:0}
.photo.anim .f2{animation:xfade 2.4s ease-in-out infinite}
@keyframes xfade{0%,35%{opacity:0}50%,85%{opacity:1}100%{opacity:0}}
.ex-thumb{background:#fff}
.anim-box{background:#fff;aspect-ratio:4/3}
.var-item{display:flex;gap:10px;align-items:center}
.var-item .vt{flex:1}
.var-media{width:84px;height:64px;flex:none;border-radius:8px;overflow:hidden;background:#111}
.var-media .photo img{object-fit:cover}
.var-media .photo .bg{display:none}
.sk{stroke:var(--tx);stroke-width:5;stroke-linecap:round;stroke-linejoin:round;fill:none}
.sk-w{stroke:var(--acc);stroke-width:7}
.sk-b{stroke:var(--tx3);stroke-width:6}