:root{
  --bg:#14171a;
  --surface:#1c2023;
  --surface-hi:#262b2f;
  --line:#33393e;
  --chalk:#eceeec;
  --chalk-dim:#9aa3a8;
  --brass:#c9922f;
  --sage:#6f8a68;
  --rust:#b8523f;
  --steel:#4d7f8c;
  --leather:#93704a;
  --plum:#7d6390;
  --danger:#c14b3d;
  --on-accent:#14171a;

  --radius-sm:7px;
  --radius-md:11px;
  --radius-lg:16px;
  --radius-pill:999px;
  --shadow-card:0 1px 2px rgba(0,0,0,.35), 0 10px 26px -16px rgba(0,0,0,.65);
  --shadow-card-hi:0 2px 4px rgba(0,0,0,.4), 0 16px 32px -14px rgba(0,0,0,.7);
  --ease:cubic-bezier(.2,.8,.2,1);
}
/* Light theme: dark is the default identity, light follows system
   preference unless the user explicitly toggles (data-theme). */
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg:#f4f1ea;
    --surface:#ffffff;
    --surface-hi:#ece6d8;
    --line:#ddd5c2;
    --chalk:#221e17;
    --chalk-dim:#726a5a;
    --brass:#93631c;
    --sage:#4c6b46;
    --rust:#a1432f;
    --steel:#376073;
    --leather:#7a5a37;
    --plum:#66507a;
    --danger:#a1382b;
    --shadow-card:0 1px 2px rgba(30,25,15,.06), 0 10px 24px -16px rgba(30,25,15,.18);
    --shadow-card-hi:0 2px 4px rgba(30,25,15,.08), 0 16px 30px -14px rgba(30,25,15,.22);
  }
}
:root[data-theme="light"]{
  --bg:#f4f1ea;
  --surface:#ffffff;
  --surface-hi:#ece6d8;
  --line:#ddd5c2;
  --chalk:#221e17;
  --chalk-dim:#726a5a;
  --brass:#93631c;
  --sage:#4c6b46;
  --rust:#a1432f;
  --steel:#376073;
  --leather:#7a5a37;
  --plum:#66507a;
  --danger:#a1382b;
  --shadow-card:0 1px 2px rgba(30,25,15,.06), 0 10px 24px -16px rgba(30,25,15,.18);
  --shadow-card-hi:0 2px 4px rgba(30,25,15,.08), 0 16px 30px -14px rgba(30,25,15,.22);
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;background:var(--bg);color:var(--chalk);
  font-family:'Inter',system-ui,sans-serif;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;}
h1,h2,h3,.display{font-family:'Oswald',sans-serif;}
a{color:inherit;text-decoration:none;}
b,strong,.tnum{font-variant-numeric:tabular-nums;}
::selection{background:var(--brass);color:var(--on-accent);}
.wrap{max-width:480px;margin:0 auto;padding:22px 16px calc(100px + env(safe-area-inset-bottom,0px));
  animation:rise .4s var(--ease) both;}
@keyframes rise{from{opacity:0;transform:translateY(6px);} to{opacity:1;transform:translateY(0);}}
@media (prefers-reduced-motion:reduce){ .wrap{animation:none;} }

/* header */
.top{position:relative;padding-bottom:16px;padding-right:44px;border-bottom:1px solid var(--line);margin-bottom:18px;}
.theme-toggle{position:absolute;top:0;right:0;width:34px;height:34px;border-radius:50%;border:1px solid var(--line);
  background:var(--surface);color:var(--chalk-dim);display:flex;align-items:center;justify-content:center;cursor:pointer;
  appearance:none;-webkit-appearance:none;font-family:inherit;
  transition:border-color .15s var(--ease), color .15s var(--ease), transform .15s var(--ease);}
.theme-toggle svg{width:17px;height:17px;}
.theme-toggle:active{transform:scale(.9);}
@media (hover:hover){ .theme-toggle:hover{border-color:var(--brass);color:var(--brass);} }
.top .kicker{font-size:12px;letter-spacing:.09em;color:var(--brass);text-transform:uppercase;font-weight:600;}
.top h1{font-size:27px;line-height:1.16;margin:5px 0 8px;font-weight:600;letter-spacing:.005em;}
.top p{font-size:14px;color:var(--chalk-dim);margin:0;line-height:1.55;}
.brand{display:flex;align-items:center;gap:8px;margin-bottom:4px;}
.brand .mark{width:22px;height:22px;flex:0 0 auto;color:var(--brass);}
.brand span{font-family:'Oswald';font-size:14px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--chalk-dim);}

.stat-row{display:flex;gap:10px;margin-top:16px;}
.stat{flex:1;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:11px 8px;text-align:center;
  box-shadow:var(--shadow-card);}
.stat b{display:block;font-family:'Oswald';font-size:21px;font-weight:600;}
.stat span{font-size:10.5px;color:var(--chalk-dim);letter-spacing:.01em;}

/* section titles */
.sec-title{font-size:12px;letter-spacing:.09em;text-transform:uppercase;color:var(--chalk-dim);font-weight:600;margin:26px 0 11px;}
.sec-title:first-child{margin-top:0;}

/* accordion */
details{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);margin-bottom:10px;overflow:hidden;
  box-shadow:var(--shadow-card);}
summary{padding:13px 15px;font-size:14px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;
  transition:background-color .15s var(--ease);}
summary::-webkit-details-marker{display:none;}
summary::after{content:'+';color:var(--chalk-dim);font-size:18px;transition:transform .2s var(--ease);}
details[open] summary::after{content:'\2013';}
.acc-body{padding:2px 15px 15px;font-size:13px;color:var(--chalk-dim);line-height:1.55;}

.pattern-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:4px;}
.pattern-tag{display:flex;align-items:center;gap:7px;font-size:12px;}
.dot{width:9px;height:9px;border-radius:50%;flex:0 0 auto;}
.pattern-tag b{font-size:11px;letter-spacing:.04em;text-transform:uppercase;font-weight:600;color:var(--chalk);}

.grip-card{border-top:1px solid var(--line);padding:10px 0;}
.grip-card:first-child{border-top:none;padding-top:2px;}
.grip-card b{color:var(--chalk);font-size:13px;}

/* bell picker */
.bell-controls{display:flex;gap:8px;margin:10px 0 12px;}
.seg{flex:1;background:var(--surface-hi);border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px 8px;min-height:44px;
  text-align:center;font-size:12px;color:var(--chalk-dim);cursor:pointer;font-family:inherit;appearance:none;-webkit-appearance:none;
  transition:border-color .15s var(--ease), color .15s var(--ease), background-color .15s var(--ease);}
.seg.active{border-color:var(--brass);color:var(--chalk);background:rgba(201,146,47,0.12);}
select,input[type="number"],input[type="text"]{width:100%;background:var(--surface-hi);border:1px solid var(--line);color:var(--chalk);
  padding:10px 11px;border-radius:var(--radius-sm);font-size:16px;margin-top:4px;font-family:inherit;
  transition:border-color .15s var(--ease);}
select:focus,input:focus{outline:none;border-color:var(--brass);}
label{font-size:12px;color:var(--chalk-dim);display:block;margin-top:12px;}
label:first-child{margin-top:0;}
.bell-result{margin-top:10px;padding:13px;border-radius:var(--radius-sm);background:rgba(201,146,47,.08);border:1px solid rgba(201,146,47,.35);text-align:center;}
.bell-result b{font-family:'Oswald';font-size:22px;color:var(--brass);}
.bell-result span{display:block;font-size:11px;color:var(--chalk-dim);margin-top:2px;}

/* generic result card, reusable for calculators */
.result-card{margin-top:10px;padding:15px;border-radius:var(--radius-md);background:var(--surface-hi);border:1px solid var(--line);text-align:center;}
.result-card b{font-family:'Oswald';font-size:26px;display:block;}
.result-card span{display:block;font-size:11.5px;color:var(--chalk-dim);margin-top:4px;line-height:1.5;}
.result-card .badge{display:inline-block;margin-top:8px;font-size:11px;font-weight:600;padding:4px 10px;border-radius:var(--radius-pill);}

.mode-meta{font-size:12.5px;color:var(--chalk-dim);margin-bottom:14px;line-height:1.55;}
.mode-meta b{color:var(--chalk);}

/* exercise cards */
.ex-card{display:flex;gap:11px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-md);padding:12px;margin-bottom:8px;box-shadow:var(--shadow-card);}
.ex-icon{width:58px;height:58px;flex:0 0 auto;background:var(--surface-hi);border:1px solid var(--line);border-radius:var(--radius-sm);padding:9px;
  display:flex;align-items:center;justify-content:center;overflow:hidden;}
.ex-icon svg{width:100%;height:100%;display:block;}
.ex-icon img{width:100%;height:100%;object-fit:cover;border-radius:5px;display:block;}
.ex-icon.photo{background:#e9e4da;border-color:#3a3128;padding:0;}
.ex-icon-lg{width:100%;max-width:220px;height:150px;margin:0 auto 12px;padding:10px;border-radius:var(--radius-md);}
.ex-icon-lg img{object-fit:contain;border-radius:8px;}
.ex-icon-lg.photo{padding:6px;}
.ex-icon-lg svg{width:110px;height:110px;margin:0 auto;}
.ex-body{flex:1;min-width:0;}
.ex-name{font-size:14.5px;font-weight:600;color:var(--chalk);letter-spacing:.002em;}
.ex-sub{font-size:12px;color:var(--chalk-dim);margin-top:2px;}

.reset-link{text-align:center;font-size:12.5px;color:var(--chalk-dim);text-decoration:underline;margin:14px 0 6px;cursor:pointer;
  transition:color .15s var(--ease);}
.reset-link:hover{color:var(--chalk);}

/* bottom nav */
.bottom-nav{position:fixed;left:0;right:0;bottom:0;min-height:56px;padding-bottom:env(safe-area-inset-bottom,0px);
  background:rgba(28,32,35,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-top:1px solid var(--line);display:flex;z-index:30;}
.bottom-nav a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  color:var(--chalk-dim);font-size:10px;font-weight:600;transition:color .15s var(--ease);}
.bottom-nav a svg{width:19px;height:19px;transition:transform .15s var(--ease);}
.bottom-nav a.active{color:var(--brass);}
.bottom-nav a.active svg{transform:translateY(-1px);}

/* buttons */
.btn{display:block;width:100%;text-align:center;padding:12px;border-radius:var(--radius-sm);border:1px solid var(--line);
  background:var(--surface-hi);color:var(--chalk);font-size:14px;font-weight:600;cursor:pointer;font-family:inherit;
  transition:border-color .15s var(--ease), transform .1s var(--ease), box-shadow .15s var(--ease), background-color .15s var(--ease);}
.btn:active{transform:scale(.97);}
.btn-primary{background:var(--brass);border-color:var(--brass);color:#14171a;box-shadow:0 6px 18px -8px rgba(201,146,47,.55);}
.btn-primary:active{transform:scale(.97);}
.btn-ghost{background:transparent;}
.btn-row{display:flex;gap:8px;}
.btn-row .btn{flex:1;}
@media (hover:hover){
  .btn:hover{border-color:var(--brass);}
  .btn-ghost:hover{background:var(--surface);}
}

/* program cards */
.prog-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:15px;margin-bottom:10px;
  box-shadow:var(--shadow-card);transition:border-color .15s var(--ease), transform .15s var(--ease), box-shadow .15s var(--ease);}
.prog-card:active{transform:scale(.985);}
@media (hover:hover){
  a.prog-card:hover{border-color:var(--brass); box-shadow:var(--shadow-card-hi); transform:translateY(-1px);}
}
.prog-top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;}
.prog-cat{font-size:10.5px;text-transform:uppercase;letter-spacing:.07em;font-weight:700;}
.prog-title{font-family:'Oswald';font-size:17.5px;font-weight:600;margin:4px 0 6px;letter-spacing:.002em;}
.prog-desc{font-size:12.5px;color:var(--chalk-dim);line-height:1.55;}
.prog-meta{display:flex;gap:8px;margin-top:11px;flex-wrap:wrap;}
.prog-meta span{font-size:11px;color:var(--chalk-dim);background:var(--surface-hi);border:1px solid var(--line);padding:4px 9px;border-radius:var(--radius-pill);}
.reco-flag{font-size:10.5px;font-weight:700;color:var(--on-accent);background:var(--brass);padding:4px 9px;border-radius:var(--radius-pill);flex:0 0 auto;}

.filter-row{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:18px;}
.filter-chip{font-size:12px;padding:10px 15px;min-height:44px;border-radius:var(--radius-pill);background:var(--surface);border:1px solid var(--line);
  color:var(--chalk-dim);cursor:pointer;font-family:inherit;appearance:none;-webkit-appearance:none;
  transition:border-color .15s var(--ease), color .15s var(--ease), background-color .15s var(--ease);}
.filter-chip.active{border-color:var(--brass);color:var(--chalk);background:rgba(201,146,47,.12);}

/* quiz */
.quiz-progress{height:4px;background:var(--surface);border-radius:var(--radius-pill);overflow:hidden;margin-bottom:22px;}
.quiz-progress i{display:block;height:100%;background:linear-gradient(90deg,var(--leather),var(--brass));transition:width .3s var(--ease);}
.quiz-q{font-family:'Oswald';font-size:19.5px;font-weight:600;margin:0 0 15px;line-height:1.32;}
.quiz-opt{display:block;width:100%;text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:14px 15px;margin-bottom:8px;font-size:14px;color:var(--chalk);cursor:pointer;font-family:inherit;
  box-shadow:var(--shadow-card);transition:border-color .15s var(--ease), background-color .15s var(--ease), transform .1s var(--ease);}
.quiz-opt:active{transform:scale(.985);}
.quiz-opt.selected{border-color:var(--brass);background:rgba(201,146,47,.1);}
.quiz-opt small{display:block;color:var(--chalk-dim);font-size:11.5px;margin-top:3px;font-weight:400;}

/* history / progression */
.hist-item{display:flex;justify-content:space-between;align-items:center;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-md);padding:12px 14px;margin-bottom:8px;box-shadow:var(--shadow-card);}
.hist-item .h-name{font-size:13.5px;font-weight:600;}
.hist-item .h-date{font-size:11px;color:var(--chalk-dim);margin-top:2px;}
.hist-item .h-time{font-family:'Oswald';font-size:15px;color:var(--brass);}
.empty-note{font-size:13px;color:var(--chalk-dim);text-align:center;padding:32px 12px;line-height:1.65;}

.spark{display:flex;align-items:flex-end;gap:4px;height:70px;margin:10px 0 2px;}
.spark i{flex:1;background:var(--surface-hi);border:1px solid var(--line);border-radius:4px 4px 0 0;min-height:3px;position:relative;
  transition:height .3s var(--ease);}
.spark i.has{background:linear-gradient(180deg,var(--brass),var(--leather));border-color:var(--brass);opacity:.9;}
.spark-labels{display:flex;gap:4px;}
.spark-labels span{flex:1;text-align:center;font-size:9.5px;color:var(--chalk-dim);}

.session-banner{display:flex;justify-content:space-between;align-items:center;gap:10px;background:rgba(201,146,47,.1);
  border:1px solid rgba(201,146,47,.35);border-radius:var(--radius-md);padding:13px 15px;margin-bottom:18px;}
.session-banner div b{display:block;font-size:13.5px;}
.session-banner div span{font-size:11.5px;color:var(--chalk-dim);}

/* session runner */
.session-hero{text-align:center;padding:16px 0 6px;}
.session-hero .big-time{font-family:'Oswald';font-size:56px;font-weight:600;letter-spacing:.01em;}
.session-hero .phase{font-size:12px;letter-spacing:.09em;text-transform:uppercase;color:var(--chalk-dim);font-weight:600;margin-top:5px;}
.progress-bar{height:6px;background:var(--surface);border-radius:var(--radius-pill);overflow:hidden;margin:16px 0;}
.progress-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--leather),var(--brass));transition:width .35s var(--ease);}
.exercise-focus{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px 20px;text-align:center;
  margin-bottom:16px;box-shadow:var(--shadow-card);}
.exercise-focus .ex-icon{margin:0 auto 10px;width:52px;height:52px;padding:10px;}
.exercise-focus h2{font-size:22px;margin:0 0 5px;letter-spacing:.002em;}
.exercise-focus p{font-size:13.5px;color:var(--chalk-dim);margin:0;}
.exercise-focus .cue{font-size:12px;color:var(--chalk-dim);font-style:italic;margin-top:11px;line-height:1.55;}
.weight-row{margin-top:14px;text-align:left;max-width:160px;margin-left:auto;margin-right:auto;}
.weight-row label{font-size:11px;margin-top:0;}
.ex-cue{font-size:11.5px;color:var(--chalk-dim);font-style:italic;margin-top:3px;}
.up-next{font-size:12px;color:var(--chalk-dim);text-align:center;margin-bottom:18px;}
.up-next b{color:var(--chalk);}
.runner-controls{display:flex;gap:10px;}
.runner-controls .btn{flex:1;}
.summary-card{text-align:center;padding:36px 20px;}
.summary-card .big-num{font-family:'Oswald';font-size:46px;color:var(--brass);}

@media (max-width:360px){
  .session-hero .big-time{font-size:44px;}
}

.filter-chip:focus-visible, .seg:focus-visible, .quiz-opt:focus-visible,
.btn:focus-visible, .prog-card:focus-visible, summary:focus-visible{
  outline:2px solid var(--brass); outline-offset:2px;
}