:root{
  color-scheme:light dark;
  --blue:#007AFF;--green:#34C759;--orange:#FF9500;--red:#FF3B30;
  --bg:#F2F2F7;--cell:#FFFFFF;--bg3:#F2F2F7;
  --label:#000000;--label2:rgba(60,60,67,.6);--label3:rgba(60,60,67,.3);
  --sep:rgba(60,60,67,.29);--fill:rgba(118,118,128,.12);--fill2:rgba(120,120,128,.16);
  --bar:rgba(249,249,249,.94);--knob:#FFFFFF;--dim:rgba(0,0,0,.4);
  --spring:cubic-bezier(.32,.72,0,1);
}
@media (prefers-color-scheme:dark){:root{
  --blue:#0A84FF;--green:#30D158;--orange:#FF9F0A;--red:#FF453A;
  --bg:#000000;--cell:#1C1C1E;--bg3:#2C2C2E;
  --label:#FFFFFF;--label2:rgba(235,235,245,.6);--label3:rgba(235,235,245,.3);
  --sep:rgba(84,84,88,.65);--fill:rgba(118,118,128,.24);--fill2:rgba(120,120,128,.32);
  --bar:rgba(22,22,22,.94);--knob:#FFFFFF;--dim:rgba(0,0,0,.6);
}}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0}
html,body{background:var(--bg);color:var(--label);width:100%;overflow-x:hidden;
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","Helvetica Neue",Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%;touch-action:manipulation;font-size:17px;letter-spacing:-.41px}
body{min-height:100vh;min-height:100dvh;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}
button,.row.tap,.seg,.stepper,.toggle,.list .item{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;touch-action:manipulation}
svg.i{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;flex:none}
.shell{max-width:1100px;margin:0 auto;padding:0 16px 24px}
/* nav: large title collapses to inline title */
.nav{position:fixed;top:0;left:0;right:0;z-index:20;padding-top:env(safe-area-inset-top);height:calc(44px + env(safe-area-inset-top));
  display:flex;align-items:flex-end;justify-content:center;background:transparent;transition:background .2s}
.nav .t{height:44px;line-height:44px;font-weight:600;font-size:17px;opacity:0;transition:opacity .2s}
.nav.on{background:var(--bar);-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);box-shadow:0 .5px 0 var(--sep)}
.nav.on .t{opacity:1}
.nav .act{position:absolute;right:calc(8px + env(safe-area-inset-right));bottom:0;width:44px;height:44px;display:grid;place-items:center;color:var(--blue)}
header{padding-top:44px}
.titlerow{display:flex;align-items:baseline;justify-content:space-between;padding:2px 4px 8px}
h1{font-size:34px;font-weight:700;letter-spacing:.37px;line-height:41px}
.date{color:var(--label2);font-size:15px}
/* segmented control */
.seg{position:relative;display:grid;grid-template-columns:repeat(4,1fr);background:var(--fill);border-radius:9px;padding:2px;height:36px;margin-bottom:16px}
.seg .thumb{position:absolute;top:2px;bottom:2px;left:2px;width:calc((100% - 4px)/4);border-radius:7px;background:var(--cell);
  box-shadow:0 3px 8px rgba(0,0,0,.12),0 3px 1px rgba(0,0,0,.04);transition:transform .35s var(--spring)}
@media (prefers-color-scheme:dark){.seg .thumb{background:#636366}}
.seg button{position:relative;z-index:1;font-size:13px;font-weight:500;min-height:32px}
.seg button.on{font-weight:600}
/* progress */
.prog{display:flex;gap:3px;margin:0 4px 12px}
.prog button{flex:1;height:22px;display:flex;align-items:center}
.prog button i{display:block;width:100%;height:4px;border-radius:2px;background:var(--fill2)}
.prog button.d i{background:var(--green)}.prog button.c i{background:var(--blue)}
/* inset grouped */
.sec{margin-bottom:20px}
.sec h3{font-size:13px;font-weight:400;text-transform:uppercase;color:var(--label2);padding:0 16px 6px;letter-spacing:-.08px}
.sec .foot{font-size:13px;color:var(--label2);padding:6px 16px 0}
.group{background:var(--cell);border-radius:10px;overflow:hidden}
.row{display:flex;align-items:center;gap:12px;min-height:44px;padding:0 16px;position:relative}
.row+.row::before{content:"";position:absolute;top:0;left:16px;right:0;border-top:.5px solid var(--sep)}
.row .k{flex:1;min-width:0}.row .v{color:var(--label2);text-align:right}
.row .chev{color:var(--label3);width:14px;height:14px;stroke-width:2.6}
.row.tap:active,.list .item:active{background:var(--fill2)}
.hero{padding:14px 16px 12px}
.eyebrow{font-size:13px;font-weight:600;color:var(--blue);text-transform:uppercase;letter-spacing:-.08px}
.hero h2{font-size:28px;font-weight:700;letter-spacing:.36px;line-height:1.15;margin:2px 0 4px}
.hero .meta{font-size:15px;color:var(--label2)}
.hero .tip{font-size:15px;color:var(--orange);margin-top:6px;font-weight:500}
.big{font-size:22px;font-weight:600;color:var(--label);font-variant-numeric:tabular-nums}
/* stepper */
.stepper{display:flex;align-items:center;background:var(--fill);border-radius:9px;height:36px}
.stepper button{width:52px;height:44px;display:grid;place-items:center;color:var(--label)}
.stepper button:active{opacity:.4}
.stepper .d{width:.5px;height:18px;background:var(--sep)}
.repsval{min-width:40px;text-align:center;font-size:22px;font-weight:600;font-variant-numeric:tabular-nums}
/* toggle */
.toggle{width:51px;height:31px;border-radius:16px;background:var(--fill2);position:relative;transition:background .25s;flex:none}
.toggle::after{content:"";position:absolute;top:2px;left:2px;width:27px;height:27px;border-radius:50%;background:var(--knob);box-shadow:0 3px 8px rgba(0,0,0,.15),0 3px 1px rgba(0,0,0,.06);transition:transform .3s var(--spring)}
.toggle.on{background:var(--green)}.toggle.on::after{transform:translateX(20px)}
/* buttons */
.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;height:50px;border-radius:12px;background:var(--blue);color:#fff;font-size:17px;font-weight:600;transition:transform .12s,opacity .12s}
.btn:active{transform:scale(.97);opacity:.8}
.btn.gray{background:var(--fill);color:var(--blue)}
.btn.green{background:var(--green)}
.btns{display:flex;gap:10px}
.link{color:var(--blue);min-height:44px;padding:0 4px;font-size:17px}
.link:active{opacity:.4}.link:disabled{color:var(--label3)}
.bar2{display:flex;justify-content:space-between;margin-top:4px}
/* ring */
.ringwrap{display:flex;flex-direction:column;align-items:center;padding:18px 16px 16px;gap:4px}
.ring{width:min(220px,58vw);height:auto}
.ring .tr{stroke:var(--fill2)}.ring .ar{stroke:var(--green);transition:stroke-dashoffset .25s linear}
.ring text{fill:var(--label);font-weight:600;font-variant-numeric:tabular-nums}
.cardio .ring .ar{stroke:var(--orange)}
/* session list */
.list .item{display:flex;align-items:center;gap:12px;min-height:56px;padding:8px 16px;position:relative;width:100%;text-align:left}
.list .item+.item::before{content:"";position:absolute;top:0;left:52px;right:0;border-top:.5px solid var(--sep)}
.list .n{width:24px;height:24px;border-radius:12px;background:var(--fill);font-size:13px;font-weight:600;display:grid;place-items:center;flex:none;color:var(--label2)}
.list .cur .n{background:var(--blue);color:#fff}.list .dn .n{background:var(--green);color:#fff}
.list .nm{font-size:17px}.list .sb{font-size:13px;color:var(--label2);margin-top:1px}
.list .dots{display:flex;gap:4px;margin-left:auto}
.list .dots span{min-width:24px;height:22px;padding:0 5px;border-radius:6px;background:var(--fill);font-size:12px;font-weight:600;display:grid;place-items:center;color:var(--label3);font-variant-numeric:tabular-nums}
.list .dots span.y{background:color-mix(in srgb,var(--green) 18%,transparent);color:var(--green)}
.center{text-align:center;padding:28px 16px}.sub{color:var(--label2)}
/* view transitions */
.view{animation:push .38s var(--spring) both}
.view.back{animation-name:pop}
@keyframes push{from{opacity:0;transform:translateX(24px)}to{opacity:1;transform:none}}
@keyframes pop{from{opacity:0;transform:translateX(-24px)}to{opacity:1;transform:none}}
/* bottom sheet */
.scrim{position:fixed;inset:0;background:var(--dim);opacity:0;transition:opacity .3s;z-index:40}
.scrim.on{opacity:1}
.sheet{position:fixed;left:0;right:0;bottom:0;z-index:41;margin:0 auto;max-width:640px;background:var(--bg);border-radius:12px 12px 0 0;
  padding:0 16px calc(16px + env(safe-area-inset-bottom));transform:translateY(105%);transition:transform .45s var(--spring);max-height:88vh;overflow:auto}
@media (prefers-color-scheme:dark){.sheet{background:#1C1C1E}.sheet .group{background:#2C2C2E}}
.sheet.on{transform:none}
.grab{width:36px;height:5px;border-radius:3px;background:var(--label3);margin:6px auto 4px}
.sheet .hd{display:flex;align-items:center;justify-content:space-between;height:44px;margin-bottom:8px}
.sheet .hd b{font-size:17px;font-weight:600}
.wbig{display:flex;align-items:center;justify-content:center;gap:14px;padding:16px 0}
.wbig input{width:150px;font:700 44px/1 -apple-system,BlinkMacSystemFont,sans-serif;text-align:center;background:none;border:0;color:var(--label);outline:none;font-variant-numeric:tabular-nums}
.round{width:52px;height:52px;border-radius:26px;background:var(--fill);display:grid;place-items:center;color:var(--blue)}
.round:active{transform:scale(.92)}
.chips{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:16px}
.chips button{min-height:36px;padding:0 14px;border-radius:18px;background:var(--fill);font-size:15px;font-weight:500}
.chips button:active{background:var(--fill2)}
.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom));transform:translate(-50%,20px);opacity:0;z-index:50;
  background:var(--bg3);color:var(--label);padding:10px 16px;border-radius:20px;font-size:15px;font-weight:500;transition:all .35s var(--spring);display:flex;gap:6px;align-items:center;box-shadow:0 4px 20px rgba(0,0,0,.12);white-space:nowrap}
.toast.on{opacity:1;transform:translate(-50%,0)}
.toast svg{color:var(--green);width:18px;height:18px}
/* layout: outer screen single column; inner screen two panes */
.panes{display:block}
.side{display:none}
@media (min-width:600px){
  .shell{padding:0 22px 24px}
  .panes{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:20px;align-items:start}
  .side{display:block}
  .hide-wide{display:none}
  .hero h2{font-size:30px}
  .ring{width:min(240px,100%)}
}
@media (max-height:560px){header{padding-top:34px}h1{font-size:28px;line-height:34px}.hero{padding:10px 16px 8px}}

.row.upnext{flex-direction:column;align-items:flex-start;gap:1px;padding:10px 16px 12px}
.wv{max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.row .v{max-width:62%}
.list .nm,.list .sb{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
@media (min-width:600px){
  .panes{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:16px}
  .ring{width:100%;max-width:280px}
  .list .item{min-height:52px}
  .side .dots span{min-width:22px}
}
@media (min-width:600px){.panes{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr)}.side .list .nm{white-space:normal;line-height:1.2}.side .dots{gap:3px}.side .dots span{min-width:20px;padding:0 3px}}

/* ===== Half-folded laptop mode (html.fold set by JS; portrait untouched) ===== */
:root{--fold:50dvh}
@media (vertical-viewport-segments:2){:root{--fold:env(viewport-segment-bottom 0 0, 50dvh)}}
html.fold,html.fold body{height:100dvh;overflow:hidden}
html.fold .nav,html.fold header{display:none}
html.fold .shell{max-width:none;padding:0;height:100%}
.fold{position:fixed;inset:0;display:grid;grid-template-rows:var(--fold) 1fr}
.ftop,.fbot{display:flex;align-items:center;gap:24px;min-height:0;overflow:hidden;
  padding-left:max(24px,env(safe-area-inset-left));padding-right:max(24px,env(safe-area-inset-right))}
.ftop{padding-top:max(12px,env(safe-area-inset-top));padding-bottom:14px;border-bottom:.5px solid var(--sep)}
.fbot{padding-top:14px;padding-bottom:max(12px,env(safe-area-inset-bottom));background:var(--cell);justify-content:center;gap:40px}
@media (vertical-viewport-segments:2){.ftop{padding-bottom:calc(14px + env(viewport-segment-top 0 1, var(--fold)) - var(--fold))}}
.fhero{flex:1.1;min-width:0}
.fhero h2{font-size:32px;font-weight:700;letter-spacing:.36px;line-height:1.1;margin:4px 0 6px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.fhero .meta{font-size:15px;color:var(--label2)}.fhero .tip{font-size:15px;color:var(--orange);margin-top:6px;font-weight:500}
.fside{flex:1;min-width:0;display:flex;flex-direction:column;gap:10px}
.fside .group{background:var(--cell)}
@media (prefers-color-scheme:dark){.fside .group{background:#1C1C1E}.fbot{background:#1C1C1E}}
.fside .dots{margin-left:0}
.fring{height:100%;display:grid;place-items:center;min-height:0}
.fring .ring{height:100%;width:auto;max-height:240px}
.fring.idle .ar{stroke:var(--fill2)}
.fbtns{display:flex;flex-direction:column;gap:10px;width:200px}
.btn:disabled{opacity:.4}

/* ===== v3 polish ===== */
.only-tall{display:none}
@media (min-width:600px) and (min-height:800px) and (orientation:portrait){
  .only-tall{display:block}
  .hero{padding:18px 16px 16px}
  .row{min-height:52px}
  #done{height:60px;font-size:19px;border-radius:14px}
  .side .list .item{min-height:66px}
}
html.fold .toast{top:calc(12px + env(safe-area-inset-top));bottom:auto}
html.fold .toast.on{transform:translate(-50%,0)}
html.fold .toast{transform:translate(-50%,-20px)}
.fhero h2{font-size:40px}
.fhero .eyebrow{font-size:15px}
.fhero .meta{font-size:19px}.fhero .tip{font-size:17px}
.fstat{display:flex;align-items:baseline;gap:6px;margin:6px 0 10px}
.fstat b{font-size:34px;font-weight:700;font-variant-numeric:tabular-nums}
.fstat span{font-size:15px;color:var(--label2);margin-right:16px}
.fold .dots span{min-width:34px;height:30px;font-size:15px;border-radius:8px}
.fnext{background:var(--cell);border-radius:12px;padding:16px 18px;gap:4px}
@media (prefers-color-scheme:dark){.fnext{background:#1C1C1E}}
.fnext h3{font-size:26px;font-weight:700;line-height:1.15}
.fnext .meta{font-size:17px;color:var(--label2)}
.fside .row{min-height:56px}.fside .big,.fside .repsval{font-size:26px}
.fside #done{height:56px;font-size:19px}