:root{
  color-scheme:dark; /* native date pickers, selects and scrollbars render dark */
  --bg:#0d1117; --bg2:#151b24; --card:#1b2330; --card2:#222c3c;
  --line:#2b3647; --text:#e6edf3; --muted:#8b97a7;
  --accent:#22d3a8; --accent2:#16a3ff; --accent-d:#0e9e7e;
  --accent2-d:#0d6cb8; --accent2-dd:#0a55a0;
  --warn:#f4a93b;
  /* tokens */
  --s1:4px; --s2:8px; --s3:12px; --s4:16px; --s5:24px;
  --r-sm:8px; --r-md:10px; --r-lg:14px; --r-full:999px;
  --fs-xs:12px; --fs-sm:13px; --fs-base:14px; --fs-lg:16px; --fs-xl:20px; --fs-2xl:26px;
  --shadow-1:0 1px 3px rgba(0,0,0,.3); --shadow-2:0 8px 28px rgba(0,0,0,.35);
  --radius:var(--r-lg); --shadow:var(--shadow-2);
}
*{box-sizing:border-box}
html{-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);
  font-family:'Segoe UI',system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;line-height:1.55}
button,.chip,.pill,.tab,.acc-head{touch-action:manipulation}
.chat,.scrollx{scrollbar-width:thin;scrollbar-color:var(--line) transparent}
.chat::-webkit-scrollbar,.scrollx::-webkit-scrollbar{height:8px;width:8px}
.chat::-webkit-scrollbar-thumb,.scrollx::-webkit-scrollbar-thumb{background:var(--line);border-radius:var(--r-full)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
#app{max-width:1040px;margin:0 auto;padding:0 16px 60px}

/* Topbar */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 4px 14px}
.brand{display:flex;align-items:center;gap:14px}
.logo{font-size:38px;filter:drop-shadow(0 4px 10px rgba(34,211,168,.4))}
.brand h1{margin:0;font-size:26px;font-weight:800;letter-spacing:-.5px}
.brand h1 span{background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
.tag{margin:2px 0 0;font-size:var(--fs-xs);color:var(--muted)}
.tag b{color:var(--text)}
.engine{font-size:var(--fs-xs);padding:6px 12px;border:1px solid var(--line);border-radius:var(--r-full);color:var(--muted);white-space:nowrap}
.engine.ai{color:var(--accent);border-color:var(--accent-d);background:rgba(34,211,168,.08)}

/* Tabs: sticky strip, one scrollable row on phones */
.tabs{display:flex;gap:6px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:0;margin-bottom:20px;
  position:sticky;top:0;z-index:20;background:rgba(13,17,23,.92);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.tab{background:none;border:none;color:var(--muted);font-size:var(--fs-base);font-weight:600;
  padding:11px 14px;cursor:pointer;border-bottom:3px solid transparent;border-radius:var(--r-sm) var(--r-sm) 0 0;transition:.15s}
.tab:hover{color:var(--text);background:var(--bg2)}
.tab.active{color:var(--text);border-bottom-color:var(--accent);background:var(--bg2)}
.panel:focus{outline:none}

/* Opacity-only fade: a transform here would become the containing block for
   the position:fixed floating rest timer and pin it to the panel, not the viewport */
.panel{display:none;animation:fade .25s ease}
.panel.active{display:block}
@keyframes fade{from{opacity:.35}to{opacity:1}}

h2{font-size:20px;margin:4px 0 6px}
.muted{color:var(--muted);font-size:var(--fs-sm);margin-top:0}
.disclaimer{color:var(--muted);font-size:12px;margin-top:18px;border-top:1px solid var(--line);padding-top:12px}

/* Buttons / inputs: one shared state language */
button.primary,.primary,.composer button{background:linear-gradient(90deg,var(--accent),var(--accent-d));color:#04231b;
  border:none;font-weight:700;font-size:var(--fs-base);padding:11px 20px;border-radius:var(--r-md);cursor:pointer;transition:.15s}
button.primary:hover,.composer button:hover{filter:brightness(1.08);transform:translateY(-1px)}
button.primary:active,.composer button:active{transform:translateY(0);filter:brightness(.92)}
button.primary:disabled,.composer button:disabled{opacity:.5;cursor:default;transform:none;filter:none}
@media(hover:none){button.primary:hover,.composer button:hover{transform:none;filter:none}}
.tab:focus-visible,.chip:focus-visible,.pill:focus-visible,.mini:focus-visible,
button.primary:focus-visible,.composer button:focus-visible,.acc-head:focus-visible,.builder summary:focus-visible{
  outline:2px solid var(--accent2);outline-offset:2px}
.mini:active,.chip:active,.pill:active{transform:scale(.96)}
input,select,textarea{background:var(--bg2);border:1px solid var(--line);color:var(--text);
  border-radius:var(--r-md);padding:10px 12px;font-size:14px;font-family:inherit;width:100%}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(34,211,168,.18)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin:14px 0}
label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted);font-weight:600}
.search{margin:10px 0 16px}
.saved{margin-left:12px;color:var(--accent);font-size:13px}
.saved.err{color:var(--warn)}
.saved:not(:empty){display:inline-block;animation:pop .18s ease}
@keyframes pop{from{opacity:0;transform:translateY(3px)}}

/* Chat */
.chat{min-height:48vh;max-height:60vh;overflow-y:auto;padding:16px 14px;display:flex;flex-direction:column;gap:14px;
  position:relative;background:var(--bg2);border:1px solid var(--line);border-radius:var(--r-lg)}
.msg{max-width:84%;padding:12px 15px;border-radius:14px;font-size:var(--fs-base);white-space:pre-wrap;word-wrap:break-word}
.msg.user{align-self:flex-end;background:linear-gradient(135deg,var(--accent2-d),var(--accent2-dd));color:#fff;border-bottom-right-radius:4px}
.msg.bot{align-self:flex-start;background:var(--card);border:1px solid var(--line);border-bottom-left-radius:4px}
.msg.bot strong{color:var(--accent)}
.msg.bot em{font-style:italic;color:var(--text);opacity:.85}
.msg.typing{color:var(--muted)}
.dots span{animation:blink 1.2s infinite;opacity:.3}
.dots span:nth-child(2){animation-delay:.2s}.dots span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,100%{opacity:.3}50%{opacity:1}}
.suggest{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 8px}
.chip{background:var(--card2);border:1px solid var(--line);color:var(--text);font:inherit;font-size:var(--fs-xs);
  padding:7px 12px;border-radius:var(--r-full);cursor:pointer;transition:.15s}
.chip:hover{border-color:var(--accent);color:var(--accent)}
.composer{display:flex;gap:10px;align-items:flex-end;margin-top:6px}
.composer textarea{resize:none;max-height:140px}

/* Form surfaces: the three main forms sit on real cards */
.builder{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;margin:0 0 20px}
.builder h2,.builder h3{margin-top:0}
.builder input,.builder select{background:var(--bg)}
.builder summary{cursor:pointer;font-weight:700;list-style:none;display:flex;align-items:center;gap:10px;font-size:var(--fs-lg)}
.builder summary::-webkit-details-marker{display:none}
.builder summary::after{content:"▾";margin-left:auto;color:var(--muted);transition:transform .25s}
.builder[open] summary::after{transform:rotate(180deg);color:var(--accent)}
.builder[open] summary{margin-bottom:12px}

/* Cards (library, knowledge, program) */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow-1)}
.card h3{margin:0 0 4px;font-size:16px}
.card .meta{font-size:12px;color:var(--accent);font-weight:600;margin-bottom:8px}
.card .sub{font-size:var(--fs-xs);color:var(--muted);margin-bottom:8px}
.card p{margin:0;font-size:var(--fs-sm)}

/* Program output */
.day{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);margin:14px 0;overflow:hidden}
.day-head{background:var(--card2);padding:12px 16px;font-weight:700;display:flex;justify-content:space-between;align-items:center}
.day-head .badge{font-size:11px;color:var(--accent);font-weight:600}
.scrollx{overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%}
table{width:100%;border-collapse:collapse;font-size:var(--fs-sm)}
th,td{text-align:left;padding:9px 16px;border-top:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-size:var(--fs-xs);text-transform:uppercase;letter-spacing:.6px}
td{font-variant-numeric:tabular-nums}
tbody tr:nth-child(even) td{background:rgba(255,255,255,.03)}
@media(hover:hover){tbody tr:hover td{background:rgba(34,211,168,.05)}}
td.ex{font-weight:600}
td .cues{display:block;color:var(--muted);font-size:12px;margin-top:3px}
.prog-meta{background:linear-gradient(120deg,rgba(34,211,168,.1),rgba(22,163,255,.08));
  border:1px solid var(--accent-d);border-radius:var(--radius);padding:16px;margin:16px 0;box-shadow:var(--shadow-2)}
.prog-meta h3{margin:0 0 8px;color:var(--accent)}
.prog-meta .row{display:flex;flex-wrap:wrap;gap:8px 22px;font-size:13px;margin-bottom:10px}
.prog-meta .row b{color:var(--text)}
.prog-meta .note{font-size:13px;color:var(--muted)}

/* Knowledge accordion: real buttons, chevron, true-height animation */
.acc{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;background:var(--card)}
.acc-head{width:100%;text-align:left;background:none;border:none;color:inherit;font:inherit;font-weight:700;
  padding:14px 16px;cursor:pointer;display:flex;align-items:center;gap:10px}
.acc-head .src{font-size:11px;color:var(--accent);font-weight:600;margin-left:auto}
.acc-head::after{content:"▾";color:var(--muted);transition:transform .25s}
.acc.open .acc-head::after{transform:rotate(180deg);color:var(--accent)}
.acc-body{display:grid;grid-template-rows:0fr;transition:grid-template-rows .28s ease;font-size:var(--fs-sm)}
.acc.open .acc-body{grid-template-rows:1fr}
.acc-inner{overflow:hidden;min-height:0;padding:0 16px}
.acc.open .acc-inner{padding:0 16px 16px}
.acc-body table{margin-top:8px}

/* Mini buttons, stats, log, timer, pills */
.mini{background:var(--card2);border:1px solid var(--line);color:var(--text);font-size:12px;
  padding:6px 10px;border-radius:var(--r-sm);cursor:pointer;transition:.15s}
.mini:hover{border-color:var(--accent);color:var(--accent)}
.section-gap{margin-top:26px}
.day-actions{display:flex;gap:10px;align-items:center}
.stats-row{display:flex;gap:12px;flex-wrap:wrap;margin:10px 0 16px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px 18px;min-width:110px;text-align:center;flex:1 1 110px;max-width:220px}
.stat b{display:block;font-size:22px;color:var(--accent)}
.stat span{font-size:12px;color:var(--muted)}
.hints{background:rgba(34,211,168,.08);border:1px solid var(--accent-d);border-radius:var(--radius);padding:12px 16px;margin-bottom:14px;font-size:var(--fs-sm)}
.hints ul{margin:8px 0 0;padding-left:20px}
.log-row{display:grid;grid-template-columns:1fr 110px 90px;gap:10px;align-items:center;margin-bottom:8px}
.log-ex{font-size:var(--fs-sm)}
.muted-inline{color:var(--muted);font-size:12px}
label.wide{margin:10px 0}
.timer{display:flex;gap:8px;align-items:center;margin:14px 0;font-size:var(--fs-sm);flex-wrap:wrap}
#timerDisplay{min-width:110px;font-weight:700;color:var(--accent);display:inline-block}
/* While counting down, the timer floats so it survives scrolling mid-workout */
.timer.running{position:fixed;left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom));z-index:30;
  background:var(--card);border:1px solid var(--accent-d);border-radius:var(--r-md);padding:10px 14px;box-shadow:var(--shadow-2);margin:0}
@media(min-width:700px){.timer.running{left:auto;width:340px}}
.timer-btn.on{border-color:var(--accent);color:var(--accent)}
.timer.done #timerDisplay{animation:tpulse .45s ease 3}
@keyframes tpulse{50%{transform:scale(1.18)}}
.pills{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 6px}
.pill{background:var(--bg2);border:1px solid var(--line);color:var(--muted);font-size:var(--fs-xs);font-weight:600;
  padding:7px 12px;border-radius:var(--r-full);cursor:pointer;transition:.15s}
.pill:hover{color:var(--text)}
.pill.on{color:#04231b;background:linear-gradient(90deg,var(--accent),var(--accent-d));border-color:transparent}
.week-note{margin-top:4px}
.chip-clear{margin-left:auto;color:var(--muted)}

@media(max-width:560px){
  .msg{max-width:92%}
  td.rest-col,th.rest-col{display:none}
  /* Log rows become fat two-column cards: name on its own line, two big inputs */
  .log-row{grid-template-columns:1fr 1fr;row-gap:6px;column-gap:10px;padding:10px 0;margin-bottom:0;border-bottom:1px solid var(--line)}
  .log-ex{grid-column:1/-1;font-size:var(--fs-base)}
  .log-w,.log-r{text-align:center}
}

/* Print: clean, ink-friendly program sheet */
@media print{
  body{background:#fff;color:#000}
  .tabs,.composer,.suggest,.engine,.chip,.mini,.pills,.timer,.builder,button{display:none!important}
  .panel{display:none!important}
  .panel.active{display:block!important}
  #app{max-width:none;padding:0}
  .day,.prog-meta,.card,.acc,.stat{box-shadow:none;border:1px solid #999;background:#fff;color:#000}
  .prog-meta{background:#fff}
  .prog-meta h3,.prog-meta .row b{color:#000}
  .day-head{background:#eee;color:#000}
  th,td{color:#000;border-color:#ccc}
  tbody tr:nth-child(even) td{background:#fff}
  td .cues{color:#444}
  .note,.muted,.prog-meta .note{color:#333}
}

/* Phone layout (single 700px breakpoint for nav/header/chat) */
@media(max-width:700px){
  .topbar{padding:10px 4px 6px;gap:10px}
  .logo{font-size:24px}
  .brand h1{font-size:19px}
  .tag{display:none}
  .engine{font-size:10.5px;padding:4px 9px}
  .tabs{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .tabs::-webkit-scrollbar{display:none}
  .tab{flex:0 0 auto;white-space:nowrap}
  #saveLog,#genBtn,#rmBtn{width:100%;padding:14px;font-size:16px}
  /* Full-height chat with the composer pinned in thumb reach */
  #coach.active{display:flex;flex-direction:column;min-height:calc(100vh - 140px);min-height:calc(100dvh - 140px)}
  .chat{flex:1 1 auto;min-height:0;max-height:none}
  .composer{position:sticky;bottom:0;z-index:20;background:var(--bg);padding:8px 0 calc(8px + env(safe-area-inset-bottom));margin-top:0}
  .suggest{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;margin:8px -16px 4px;padding:0 16px 6px}
  .suggest::-webkit-scrollbar{display:none}
  .chip{flex:0 0 auto;white-space:nowrap}
  .chip-clear{margin-left:0}
}

/* Touch ergonomics: 44px+ targets, iOS no-zoom inputs, no number spinners */
@media(pointer:coarse){
  input,select,textarea{font-size:16px;min-height:48px}
  .mini,.chip,.pill,.tab,.timer-btn{min-height:44px;display:inline-flex;align-items:center}
}
.log-w::-webkit-inner-spin-button,.log-r::-webkit-inner-spin-button,
.log-w::-webkit-outer-spin-button,.log-r::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;
    transition-duration:.01ms!important;scroll-behavior:auto!important}
}