:root{
  --bg:#F3F4F6; --card:#FFFFFF; --ink:#16191D; --ink2:#4A525C; --muted:#5B6470; --faint:#8A929C;
  --line:#E3E6EA; --seg:#E3E6EA; --accent:#1D5C87; --accent-ink:#FFFFFF; --accent-soft:#E4EEF5;
  --work:#4C3F9E; --work-soft:#ECE9F8; --good:#1F6B45; --good-soft:#E3F1E9; --bad:#9A3B3B; --bad-soft:#F6E6E6;
  --warn:#8A4705; --warn-soft:#FBEEDC; --shadow:0 1px 2px rgba(0,0,0,.08),0 4px 16px rgba(0,0,0,.06);
  --radius:14px; --tab-h:64px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0F1216; --card:#181C21; --ink:#ECEEF1; --ink2:#C3C8CF; --muted:#9AA3AE; --faint:#6E7782;
    --line:#2A3038; --seg:#232830; --accent:#5AA2D6; --accent-ink:#0B1520; --accent-soft:#16283A;
    --work:#A99CF0; --work-soft:#25213F; --good:#5CC48E; --good-soft:#14281E; --bad:#E58A8A; --bad-soft:#2E1A1A;
    --warn:#E8A65A; --warn-soft:#2E2213; --shadow:0 1px 2px rgba(0,0,0,.5);
    color-scheme:dark;
  }
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;font-size:16px;-webkit-text-size-adjust:100%}
body{min-height:100dvh}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:var(--accent)}
h1,h2,h3{font-family:Manrope,Inter,system-ui,sans-serif;margin:0;letter-spacing:-.01em}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* layout */
#app{display:grid;grid-template-columns:1fr;min-height:100dvh}
.main{padding:calc(env(safe-area-inset-top) + 16px) 16px calc(var(--tab-h) + env(safe-area-inset-bottom) + 84px);max-width:640px;width:100%;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.side{display:none}
.chatpane{display:none}
@media (min-width:1000px){
  #app{grid-template-columns:220px minmax(0,1fr) 380px}
  .side{display:flex;flex-direction:column;gap:4px;padding:20px 12px;border-right:1px solid var(--line);position:sticky;top:0;height:100dvh}
  .side .brand{font-family:Manrope,sans-serif;font-weight:800;font-size:18px;padding:4px 12px 16px}
  .side a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;color:var(--ink2);text-decoration:none;font-weight:500}
  .side a[aria-current=page]{background:var(--card);color:var(--ink);font-weight:600;box-shadow:var(--shadow)}
  .side .count{margin-left:auto;font-size:12px;font-weight:700;color:var(--muted)}
  .tabs,.fab{display:none!important}
  .main{padding:24px 28px 48px;max-width:760px}
  .chatpane{display:flex;flex-direction:column;border-left:1px solid var(--line);height:100dvh;position:sticky;top:0;background:var(--card)}
}

/* tabs */
.tabs{position:fixed;left:0;right:0;bottom:0;z-index:20;display:grid;grid-template-columns:repeat(5,1fr);background:color-mix(in srgb,var(--card) 92%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}
.tabs a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;height:var(--tab-h);text-decoration:none;color:var(--faint);font-size:11px;font-weight:600;position:relative}
.tabs a[aria-current=page]{color:var(--accent)}
.tabs .badge{position:absolute;top:8px;left:calc(50% + 6px);min-width:18px;height:18px;border-radius:9px;background:var(--bad);color:#fff;font-size:11px;display:flex;align-items:center;justify-content:center;padding:0 5px}
.fab{position:fixed;right:16px;bottom:calc(var(--tab-h) + env(safe-area-inset-bottom) + 16px);z-index:21;width:56px;height:56px;border-radius:28px;border:0;background:var(--accent);color:var(--accent-ink);box-shadow:0 6px 20px rgba(0,0,0,.25);display:flex;align-items:center;justify-content:center}

/* header */
.head{display:flex;justify-content:space-between;align-items:flex-end;gap:8px}
.eyebrow{font-size:12px;font-weight:700;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.title{white-space:nowrap;font-size:30px;font-weight:800;letter-spacing:-.02em}
.daynav{display:flex;gap:4px;align-items:center}
.iconbtn{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:var(--card);display:inline-flex;align-items:center;justify-content:center;color:var(--ink2)}
.iconbtn.plain{border:0;background:transparent}
.seg{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:4px;background:var(--seg);border-radius:12px;padding:4px}
.seg button{min-height:36px;border:0;border-radius:9px;background:transparent;color:var(--ink2);font-size:14px;font-weight:500}
.seg button[aria-pressed=true]{background:var(--card);color:var(--ink);font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.12)}

/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.card.tight{padding:0;overflow:hidden}
.label{font-size:12px;font-weight:700;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.mind{display:flex;gap:12px;align-items:flex-start;text-align:left;width:100%}
.mind .txt{font-size:16px;font-weight:500;line-height:1.4}
.mit{background:var(--accent);color:var(--accent-ink);border:0}
.mit .label{color:inherit;opacity:.85}
.mitlist{display:flex;flex-wrap:wrap;gap:0 28px}
.mitrow{display:flex;gap:10px;align-items:center;background:transparent;border:0;padding:0;color:inherit;text-align:left;min-height:44px}
.mitbox{flex:none;width:24px;height:24px;border-radius:7px;border:2px solid currentColor;display:flex;align-items:center;justify-content:center}
.mitrow[aria-pressed=true] .mitbox{background:var(--accent-ink);color:var(--accent)}
.mitrow[aria-pressed=true] .t{text-decoration:line-through;opacity:.8}
.mitrow .t{font-size:17px;font-weight:600}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{font-size:13px;padding:4px 9px;border-radius:999px;background:var(--seg);color:var(--ink2);font-weight:500}
.chip.win{background:var(--good-soft);color:var(--good)}
.cardbtn{display:block;width:100%;text-align:left;cursor:pointer;color:inherit;font:inherit;margin:0}
.cardbtn:focus-visible{outline:2px solid var(--accent);border-radius:var(--radius)}

/* quick add */
.quick{display:flex;gap:8px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:6px 6px 6px 14px}
.quick input{flex:1;border:0;background:transparent;font-size:16px;min-height:40px;outline:none}
.quick button{min-height:40px;border:0;border-radius:10px;background:var(--accent);color:var(--accent-ink);font-weight:600;padding:0 14px}
.hint{font-size:12.5px;color:var(--muted);padding:0 4px}

/* rows */
.sect{display:flex;flex-direction:column;gap:6px}
.secthead{display:flex;justify-content:space-between;align-items:baseline;padding:4px 4px 0}
.rows{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.row{display:flex;align-items:center;gap:4px;min-height:52px;border-top:1px solid var(--line);padding-right:6px}
.row:first-child{border-top:0}
.check{flex:none;width:48px;height:52px;border:0;background:transparent;display:flex;align-items:center;justify-content:center}
.box{width:22px;height:22px;border-radius:7px;border:2px solid var(--faint);display:flex;align-items:center;justify-content:center;color:transparent}
.row.done .box{background:var(--good);border-color:var(--good);color:#fff}
.row.missed .box{border-color:var(--bad);color:var(--bad)}
.row .body{flex:1;min-width:0;border:0;background:transparent;text-align:left;padding:8px 4px;display:flex;flex-direction:column;gap:2px}
.row .t{font-size:15.5px;font-weight:500;line-height:1.3;overflow-wrap:anywhere}
.row.done .t{text-decoration:line-through;color:var(--faint)}
.row .m{font-size:12.5px;color:var(--muted);display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.row .time{flex:none;font-size:13px;font-weight:700;color:var(--accent);min-width:54px;text-align:right;padding-right:8px}
.tag{font-size:10.5px;font-weight:700;letter-spacing:.05em;padding:1px 6px;border-radius:5px;text-transform:uppercase}
.tag.work{background:var(--work-soft);color:var(--work)}
.tag.roll{background:var(--warn-soft);color:var(--warn)}
.tag.miss{background:var(--bad-soft);color:var(--bad)}
.tag.book{background:var(--accent-soft);color:var(--accent)}
.tag.pay{background:var(--good-soft);color:var(--good)}
.empty{padding:18px 16px;color:var(--muted);font-size:14.5px}
.progress{height:6px;border-radius:3px;background:var(--seg);overflow:hidden}
.progress>i{display:block;height:100%;background:var(--good);border-radius:3px}

/* treadmill card */
.tread{display:flex;gap:12px;align-items:center}
.tread .big{font-family:Manrope,sans-serif;font-size:22px;font-weight:800}
.btn{min-height:44px;border-radius:12px;border:1px solid var(--line);background:var(--card);padding:0 16px;font-weight:600;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;color:var(--ink)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.danger{color:var(--bad)}
.btn.small{min-height:36px;padding:0 12px;font-size:14px}
.btnrow{display:flex;gap:8px;flex-wrap:wrap}

/* sheet */
.scrim{position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:40;display:flex;align-items:flex-end;justify-content:center}
.sheet{background:var(--bg);width:100%;max-width:560px;max-height:92dvh;overflow:auto;border-radius:18px 18px 0 0;padding:8px 16px calc(16px + env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:12px}
@media (min-width:700px){.scrim{align-items:center}.sheet{border-radius:18px;max-height:86dvh}}
.grab{width:40px;height:5px;border-radius:3px;background:var(--line);margin:4px auto}
.field{display:flex;flex-direction:column;gap:5px}
.field>span{font-size:13px;font-weight:600;color:var(--muted)}
.input,textarea.input,select.input{width:100%;min-height:44px;border:1px solid var(--line);border-radius:10px;background:var(--card);padding:10px 12px;font-size:16px}
textarea.input{min-height:84px;resize:vertical}
.fields2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.steps .row{min-height:46px}
.prov{font-size:14.5px;line-height:1.5}

/* toast */
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(var(--tab-h) + env(safe-area-inset-bottom) + 84px);z-index:60;background:var(--ink);color:var(--bg);border-radius:12px;padding:10px 10px 10px 16px;display:flex;gap:12px;align-items:center;box-shadow:0 8px 24px rgba(0,0,0,.25);max-width:calc(100% - 32px);font-size:14.5px}
.toast button{border:0;background:transparent;color:var(--accent-soft);font-weight:700;min-height:36px;padding:0 8px}
@media (min-width:1000px){.toast{bottom:24px}}

/* week / coming */
.wday{display:flex;flex-direction:column;gap:6px}
.wday h3{font-size:16px;font-weight:700;padding:0 4px;display:flex;gap:8px;align-items:baseline}
.wday h3 small{font-size:12.5px;color:var(--muted);font-weight:600}
.crow{display:flex;gap:10px;align-items:baseline;padding:11px 16px;border-top:1px solid var(--line);font-size:15px}
.crow:first-child{border-top:0}
.crow .d{flex:none;width:74px;font-size:13px;font-weight:700;color:var(--accent)}
.crow .x{flex:1;min-width:0}
.crow .x small{display:block;color:var(--muted);font-size:12.5px}
.monthhead{padding:10px 4px 2px}

/* treadmill player */
.player{display:flex;flex-direction:column;gap:14px;align-items:stretch}
.speed{font-family:Manrope,sans-serif;font-weight:800;font-size:min(34vw,170px);line-height:1;text-align:center;letter-spacing:-.04em}
.speed small{font-size:.22em;font-weight:700;color:var(--muted);letter-spacing:0}
.seglabel{text-align:center;font-size:22px;font-weight:700}
.clock{text-align:center;font-variant-numeric:tabular-nums;font-size:44px;font-weight:700}
.nextup{text-align:center;color:var(--muted);font-size:17px}
.player.warn .speed{color:var(--warn)}
.timeline{display:flex;height:34px;border-radius:8px;overflow:hidden;gap:2px}
.timeline i{display:block;background:var(--seg);position:relative}
.timeline i.jog{background:var(--accent-soft)}
.timeline i.now{outline:2px solid var(--accent);outline-offset:-2px}
.timeline i.past{opacity:.45}
.bigbtn{min-height:64px;font-size:19px;border-radius:16px}

/* weight */
.stat{display:flex;flex-direction:column;gap:2px}
.stat b{font-family:Manrope,sans-serif;font-size:26px;font-weight:800}
.stat span{font-size:12.5px;color:var(--muted);font-weight:600}
.chart svg{width:100%;height:auto;display:block}

/* chat */
.chatlog{flex:1;overflow:auto;display:flex;flex-direction:column;gap:10px;padding:16px}
.msg{max-width:88%;padding:10px 13px;border-radius:14px;font-size:15px;line-height:1.45;white-space:pre-wrap}
.msg.user{align-self:flex-end;background:var(--accent);color:var(--accent-ink);border-bottom-right-radius:4px}
.msg.assistant{align-self:flex-start;background:var(--bg);border:1px solid var(--line);border-bottom-left-radius:4px}
.change{align-self:flex-start;display:flex;gap:8px;align-items:center;font-size:13.5px;background:var(--good-soft);color:var(--good);border-radius:10px;padding:6px 6px 6px 10px}
.change button{border:0;background:transparent;color:inherit;font-weight:700;text-decoration:underline;min-height:30px}
.chatin{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line)}
.chatin textarea{flex:1;min-height:44px;max-height:140px;resize:none}
.chathead{padding:16px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}

/* login */
.login{min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:24px}
.login form{width:100%;max-width:340px;display:flex;flex-direction:column;gap:14px}
.err{color:var(--bad);font-size:14px}
.list-group h2{font-size:17px;padding:6px 4px}
.more a{display:flex;align-items:center;gap:12px;padding:14px 16px;border-top:1px solid var(--line);text-decoration:none;color:var(--ink);font-weight:500;min-height:52px}
.more a:first-child{border-top:0}
.more a .sub{margin-left:auto;color:var(--muted);font-size:13px}

/* treadmill program editor */
.segrow{display:grid;grid-template-columns:48px minmax(0,1fr) 92px 92px 40px 40px;gap:6px;align-items:center}
.segrow .input{min-height:42px;padding:8px 10px}
.segrow .iconbtn{width:40px;height:40px;font-size:20px;font-weight:600}
.segrow .iconbtn:disabled{opacity:.35}
.segstart{font-size:12.5px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums}
.segnum{position:relative;display:block}
.segnum .input{padding-right:36px;-moz-appearance:textfield}
.segnum .input::-webkit-inner-spin-button,.segnum .input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
.segnum span{position:absolute;right:9px;top:50%;transform:translateY(-50%);font-size:12px;color:var(--muted);pointer-events:none}
@media (max-width:560px){
  .segrow{grid-template-columns:44px minmax(0,1fr) minmax(0,1fr) 40px;grid-template-areas:"start lab lab del" ". min mph add";row-gap:6px;padding-bottom:10px;border-bottom:1px solid var(--line)}
  .segrow:last-child{border-bottom:0;padding-bottom:0}
  .segstart{grid-area:start}.segrow>select{grid-area:lab}.segrow>.segnum:nth-of-type(1){grid-area:min}.segrow>.segnum:nth-of-type(2){grid-area:mph}
  .segrow>.iconbtn:nth-last-child(2){grid-area:add}.segrow>.iconbtn:last-child{grid-area:del}
}

.cbrow{display:flex;align-items:center;gap:8px;min-height:44px;font-size:15px;font-weight:500;cursor:pointer;flex:1 1 140px}
.cb{width:22px;height:22px;accent-color:var(--accent);margin:0}

.whead,.wrow{padding-right:4px!important;display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,.8fr) minmax(0,.8fr) minmax(0,.9fr) 36px;align-items:center;padding:0 16px;gap:8px}
.whead{min-height:38px;font-size:12px;font-weight:700;color:var(--muted);letter-spacing:.05em;text-transform:uppercase;border-bottom:1px solid var(--line)}
.wrow{min-height:50px;border-top:1px solid var(--line);font-size:15px}
.whead+.wrow{border-top:0}
.wrow .d{font-size:14px;font-weight:600;color:var(--accent)}
.wrow .lb{font-weight:600;font-variant-numeric:tabular-nums}
.awo{display:flex;align-items:center;gap:8px;min-height:44px;cursor:pointer;font-size:13px;font-weight:700;color:var(--accent)}
.wrow .chg{font-weight:600;font-variant-numeric:tabular-nums;color:var(--muted)}
.wrow .chg.down{color:var(--good)}
.wrow .chg.up{color:var(--bad)}
.linkbtn{border:0;background:transparent;padding:0;text-align:left;text-decoration:underline;text-decoration-color:var(--line);text-underline-offset:3px;min-height:44px}
.wrow .iconbtn{width:36px;height:36px;color:var(--faint)}

.setrow{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;border-top:1px solid var(--line);min-height:60px;cursor:pointer}
.setrow:first-child{border-top:0}
.setrow .st{display:flex;flex-direction:column;gap:2px}
.setrow .st b{font-weight:600;font-size:15.5px}
.setrow .st small{color:var(--muted);font-size:13px}
.switch{appearance:none;-webkit-appearance:none;flex:none;width:50px;height:30px;border-radius:15px;background:var(--seg);border:1px solid var(--line);position:relative;cursor:pointer;transition:background .15s;margin:0}
.switch::after{content:"";position:absolute;top:2px;left:2px;width:24px;height:24px;border-radius:12px;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.3);transition:transform .15s}
.switch:checked{background:var(--good);border-color:var(--good)}
.switch:checked::after{transform:translateX(20px)}