[hidden]{display:none!important}

/* Layout: single centred study column (max 660px). Subject tiles, then topic chips, then a deck card; big tap targets for a tablet. */
:root{
  --bg:#EDF0F4; --surface:#FFFFFF; --ink:#18202E; --muted:#5B6576; --line:#D5DBE4;
  --accent:#2F4FA3; --accent-ink:#FFFFFF; --accent-soft:#E2E8F7;
  --s-re:#8A3B5C; --s-history:#9A5B12; --s-business:#1F6E73; --s-pe:#4C5BB8;
  --good:#1E7A4C; --good-soft:#DDF1E5; --bad:#B3361F; --bad-soft:#F8E1DC;
  --display:Georgia,"Iowan Old Style","Palatino Linotype",serif;
  --body:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#11151D; --surface:#1A202B; --ink:#E8ECF2; --muted:#9AA4B5; --line:#2C3443;
  --accent:#8EA8F0; --accent-ink:#0E1320; --accent-soft:#25304A;
  --s-re:#E39AB8; --s-history:#E8B26A; --s-business:#6CCBD0; --s-pe:#A3AEF5;
  --good:#5FD39A; --good-soft:#173A29; --bad:#F2876F; --bad-soft:#41231C; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#11151D; --surface:#1A202B; --ink:#E8ECF2; --muted:#9AA4B5; --line:#2C3443;
  --accent:#8EA8F0; --accent-ink:#0E1320; --accent-soft:#25304A;
  --s-re:#E39AB8; --s-history:#E8B26A; --s-business:#6CCBD0; --s-pe:#A3AEF5;
  --good:#5FD39A; --good-soft:#173A29; --bad:#F2876F; --bad-soft:#41231C; color-scheme:dark}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.5;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:20px 48px}
.wrap{max-width:660px;margin:0 auto;display:flex;flex-direction:column;gap:18px}
header{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
h1{font-family:var(--display);font-size:1.6rem;margin:0;line-height:1.2;text-wrap:balance}
h2{font-family:var(--display);font-size:1.3rem;margin:0;text-wrap:balance}
.tabs{display:flex;gap:4px;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:4px}
.tabs button{border:0;background:none;color:var(--muted);font:600 .9rem var(--body);padding:8px 14px;border-radius:999px;cursor:pointer}
.tabs button[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink)}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;display:flex;flex-direction:column;gap:16px;min-width:0}
.label{font-size:.75rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.subjects{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.subj{--c:var(--accent);text-align:left;border:1.5px solid var(--line);background:var(--surface);color:var(--ink);border-radius:14px;padding:14px;cursor:pointer;display:flex;flex-direction:column;gap:4px;font-family:var(--body);position:relative;overflow:hidden}
.subj::before{content:"";position:absolute;inset:0 auto 0 0;width:5px;background:var(--c)}
.subj b{font-family:var(--display);font-size:1.12rem;line-height:1.25}
.subj span{font-size:.82rem;color:var(--muted)}
.subj[aria-pressed="true"]{border-color:var(--c);box-shadow:0 0 0 1.5px var(--c) inset}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{border:1.5px solid var(--line);background:var(--surface);color:var(--ink);font:600 .95rem var(--body);padding:10px 14px;border-radius:12px;cursor:pointer;text-align:left}
.chip[aria-pressed="true"]{border-color:var(--accent);background:var(--accent-soft)}
.btn{border:0;background:var(--accent);color:var(--accent-ink);font:700 1.05rem var(--body);padding:15px 22px;border-radius:12px;cursor:pointer;width:100%}
.btn.ghost{background:transparent;color:var(--accent);border:1.5px solid var(--line)}
button:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.muted{color:var(--muted)}
.small{font-size:.88rem}
.stats3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.stat{border:1px solid var(--line);border-radius:12px;padding:12px;display:flex;flex-direction:column;gap:2px;min-width:0}
.stat b{font-family:var(--display);font-size:1.6rem;font-variant-numeric:tabular-nums;line-height:1.1}
.stat span{font-size:.8rem;color:var(--muted)}
.progress{display:flex;gap:6px}
.progress i{flex:1;height:6px;border-radius:3px;background:var(--line)}
.progress i.ok{background:var(--good)} .progress i.no{background:var(--bad)} .progress i.cur{background:var(--accent)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:26px 22px;display:flex;flex-direction:column;gap:14px;box-shadow:0 6px 24px -14px rgba(20,30,60,.35)}
.tag{--c:var(--accent);align-self:flex-start;color:var(--c);font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:4px 10px;border-radius:999px;border:1.5px solid currentColor}
.q{font-family:var(--display);font-size:1.32rem;line-height:1.35;margin:0;text-wrap:pretty}
.opts{display:flex;flex-direction:column;gap:10px}
.opt{text-align:left;border:1.5px solid var(--line);background:var(--surface);color:var(--ink);font:500 1.02rem var(--body);padding:14px 16px;border-radius:12px;cursor:pointer;display:flex;gap:12px;align-items:flex-start}
.opt .k{flex:none;width:26px;height:26px;border-radius:50%;border:1.5px solid var(--line);display:grid;place-items:center;font-size:.8rem;font-weight:700;color:var(--muted)}
.opt:disabled{cursor:default}
.opt.right{border-color:var(--good);background:var(--good-soft)}
.opt.wrong{border-color:var(--bad);background:var(--bad-soft)}
.explain{border-left:4px solid var(--accent);background:var(--accent-soft);padding:12px 14px;border-radius:0 10px 10px 0;font-size:.98rem}
.verdict{font-weight:700}
.verdict.ok{color:var(--good)} .verdict.no{color:var(--bad)}
.score{font-family:var(--display);font-size:4rem;line-height:1;font-variant-numeric:tabular-nums}
.score small{font-size:1.6rem;color:var(--muted)}
.miss{border:1px solid var(--line);border-radius:12px;padding:12px 14px;display:flex;flex-direction:column;gap:4px}
.miss .a{color:var(--good);font-weight:600}
.list{display:flex;flex-direction:column;gap:10px}
.row{display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);padding-bottom:8px;font-variant-numeric:tabular-nums}
.row:last-child{border-bottom:0}
.row .r{text-align:right}
.dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--c);margin-right:8px}
.weeknav{display:flex;align-items:center;justify-content:space-between;gap:8px}
.weeknav button{border:1.5px solid var(--line);background:var(--surface);color:var(--ink);border-radius:10px;padding:8px 14px;font:600 .95rem var(--body);cursor:pointer}
.weeknav button:disabled{opacity:.4;cursor:default}
.note{font-size:.85rem;color:var(--muted);text-align:center}
pre.summary{white-space:pre-wrap;font:500 .9rem/1.5 var(--body);background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:12px;margin:0;overflow-x:auto}
.belt{display:inline-flex;align-items:center;justify-content:flex-end;gap:2px;width:68px;height:16px;flex:none;border-radius:3px;border:1px solid rgba(0,0,0,.28);padding:0 4px;vertical-align:middle}
.belt i{width:3px;height:10px;background:#D9B23A;border-radius:1px}
.beltrow{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.beltrow b{font-family:var(--display);font-size:1.25rem}
.bar{height:10px;border-radius:5px;background:var(--line);overflow:hidden}
.bar span{display:block;height:100%;background:var(--accent);border-radius:5px}
.promo{border:2px solid #D9B23A;background:var(--accent-soft);border-radius:14px;padding:16px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.promo strong{font-family:var(--display);font-size:1.2rem}
.subj .beltline{display:flex;align-items:center;gap:8px;font-size:.82rem;color:var(--ink)}
details.rules summary{cursor:pointer;color:var(--accent);font-weight:600}
details.rules ul{margin:.5em 0 0;padding-left:1.2em;color:var(--muted);font-size:.92rem}
@media (max-width:420px){.q{font-size:1.18rem}.stat b{font-size:1.3rem}.panel,.card{padding:18px 16px}.subjects{grid-template-columns:minmax(0,1fr)}}
@media (prefers-reduced-motion:no-preference){.card{animation:in .25s ease-out}@keyframes in{from{transform:translateY(6px);opacity:.6}to{transform:none;opacity:1}}}
/* web app additions */
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-weight:600;font-size:.92rem}
.field input{font:500 1.05rem var(--body);padding:12px 14px;border-radius:10px;border:1.5px solid var(--line);background:var(--surface);color:var(--ink);width:100%}
.field input:focus{outline:3px solid var(--accent-soft);border-color:var(--accent)}
.field small{color:var(--muted)}
.error{color:var(--bad);font-weight:600;margin:0}
.ok-msg{color:var(--good);font-weight:600;margin:0}
.linkbtn{background:none;border:0;color:var(--accent);font:600 .95rem var(--body);cursor:pointer;padding:4px 0;text-align:left}
.tabs{flex-wrap:wrap}
.copyrow{display:flex;gap:8px;flex-wrap:wrap}
.copyrow input{flex:1 1 220px;min-width:0;font:500 .85rem var(--body);padding:10px;border-radius:10px;border:1.5px solid var(--line);background:var(--bg);color:var(--ink)}
.copyrow button{flex:none;width:auto}
.center{text-align:center}
.belt .tip{display:inline-flex;align-items:center;justify-content:center;gap:2px;width:22px;height:100%;background:#141414;margin-right:-4px;padding:0 2px}
.belt .tip b{display:block;width:2px;height:9px;background:#fff;border-radius:1px}
.streak{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px 22px}
.streak>div{display:flex;align-items:baseline;gap:8px;min-width:0;flex-wrap:wrap}
.streak b{font-family:var(--display);font-size:1.6rem;font-variant-numeric:tabular-nums}
.streak span{color:var(--muted);font-size:.9rem}
.streak p{grid-column:1/-1}
.ready{font-weight:700;color:var(--good)}