/* ============================================================
   Learn Locus drills — shared stylesheet
   Used by index.html (the menu) and drill.html (the runner).
   Change it here once; both pages pick it up.
   ============================================================ */

:root{
  --navy:#1B2A4A;
  --navy-soft:#2E4269;
  --copper:#B87333;
  --copper-light:#D99A5B;
  --parchment:#F7F3EA;
  --paper:#FFFFFF;
  --ink:#22304D;
  --muted:#6B7793;
  --line:#E3DCCD;
  --green:#2E7D5B;
  --green-bg:#F1F8F4;
  --red:#B3443B;
  --red-bg:#FCF2F1;
  --radius:14px;
  --shadow:0 2px 4px rgba(27,42,74,.06), 0 12px 32px rgba(27,42,74,.10);
}

*{box-sizing:border-box}
body{
  margin:0;
  background:var(--parchment);
  color:var(--ink);
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  display:flex;
  flex-direction:column;
  min-height:100dvh;
}

/* ---------- chrome ---------- */
header{
  background:var(--navy);
  color:#fff;
  padding:14px 20px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}
.brand{
  font-family:"Cormorant Garamond",Georgia,serif;
  font-size:22px;
  font-weight:600;
  letter-spacing:.02em;
  color:#fff;
  text-decoration:none;
}
.brand span{color:var(--copper-light)}
.brand:hover span{color:#fff}
.hdr-meta{font-size:13px;color:#B9C4DA;font-variant-numeric:tabular-nums}

main{flex:1;width:100%;max-width:820px;margin:0 auto;padding:28px 20px 56px}
main.wide{max-width:1020px}

footer{text-align:center;font-size:12px;color:var(--muted);padding:0 20px 26px}

/* ---------- surfaces & type ---------- */
.card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:28px;
}
h1{
  font-family:"Cormorant Garamond",Georgia,serif;
  font-size:34px;font-weight:600;line-height:1.15;
  margin:0 0 8px;color:var(--navy);
}
h2{
  font-family:"Cormorant Garamond",Georgia,serif;
  font-size:26px;font-weight:600;margin:0 0 14px;color:var(--navy);
}
.lede{color:var(--muted);margin:0 0 26px;font-size:15px}
.hint{font-size:12.5px;color:var(--muted);margin-top:9px}
kbd{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:11px;background:var(--parchment);
  border:1px solid var(--line);border-bottom-width:2px;
  border-radius:4px;padding:1px 5px;
}

/* ---------- controls ---------- */
.field{margin-bottom:24px}
.lbl{
  display:block;font-size:12px;font-weight:700;letter-spacing:.09em;
  text-transform:uppercase;color:var(--muted);margin-bottom:10px;
}
.row{display:flex;gap:26px;flex-wrap:wrap;align-items:flex-end}

select{
  font:inherit;padding:10px 12px;border:1px solid var(--line);
  border-radius:9px;background:var(--paper);color:var(--ink);min-width:150px;
}
select:focus,input:focus{outline:2px solid var(--copper);outline-offset:1px}

.btn{
  font:inherit;font-weight:600;padding:12px 24px;border-radius:10px;
  border:1px solid transparent;cursor:pointer;
  transition:transform .06s, filter .15s, background .15s;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--copper);color:#fff}
.btn-primary:hover{filter:brightness(1.07)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{filter:brightness(1.18)}
.btn-ghost{background:transparent;color:var(--navy);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--navy)}
.btn-got{background:var(--green);color:#fff}
.btn-missed{background:var(--red);color:#fff}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-lg{padding:14px 34px;font-size:16px}

.chips{display:flex;flex-wrap:wrap;gap:9px}
.chip{
  display:inline-flex;align-items:center;gap:8px;padding:9px 15px;
  border:1px solid var(--line);border-radius:999px;background:var(--parchment);
  cursor:pointer;font-size:14px;font-weight:500;user-select:none;
  transition:background .15s,border-color .15s,color .15s;
}
.chip input{margin:0;accent-color:var(--copper)}
.chip:hover{border-color:var(--copper)}
.chip.on{background:var(--navy);border-color:var(--navy);color:#fff}
.chip .count{font-size:12px;opacity:.65;font-variant-numeric:tabular-nums}

/* ============================================================
   MENU (index.html)
   ============================================================ */
.subject-group{margin-bottom:34px}
.subject-head{
  font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);margin:0 0 14px;padding-bottom:9px;
  border-bottom:1px solid var(--line);
}
.drill-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:16px}

a.drill-card{
  display:flex;flex-direction:column;
  background:var(--paper);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);
  padding:22px 24px;text-decoration:none;color:inherit;
  transition:transform .12s ease, border-color .15s, box-shadow .15s;
}
a.drill-card:hover{
  transform:translateY(-2px);
  border-color:var(--copper);
  box-shadow:0 4px 8px rgba(27,42,74,.08), 0 18px 40px rgba(27,42,74,.14);
}
.drill-card .dc-name{
  font-family:"Cormorant Garamond",Georgia,serif;
  font-size:24px;font-weight:600;color:var(--navy);line-height:1.2;margin-bottom:7px;
}
.drill-card .dc-blurb{font-size:14px;color:var(--muted);flex:1;margin-bottom:16px}
.drill-card .dc-meta{
  display:flex;gap:9px;flex-wrap:wrap;align-items:center;
  font-size:11px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;
}
.pill{border-radius:999px;padding:3px 11px;border:1px solid currentColor}
.pill.fmt{color:var(--copper)}
.pill.n{color:var(--muted);border-color:var(--line);background:var(--parchment)}

.empty{
  text-align:center;padding:46px 24px;color:var(--muted);
  border:1px dashed var(--line);border-radius:var(--radius);
}

/* ============================================================
   RUNNER (drill.html)
   ============================================================ */
.drill-top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:6px}
.progress-text{
  font-size:12px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  color:var(--muted);font-variant-numeric:tabular-nums;
}
.topic-badge{
  font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:var(--copper);border:1px solid var(--copper);border-radius:999px;padding:3px 11px;
}
.bar{height:3px;background:var(--line);border-radius:2px;overflow:hidden;margin-bottom:26px}
.bar > i{display:block;height:100%;background:var(--copper);width:0;transition:width .3s ease}

.qwrap{display:flex;gap:22px;align-items:flex-start;margin-bottom:26px}
.question{
  flex:1;font-family:"Cormorant Garamond",Georgia,serif;
  font-size:29px;line-height:1.35;color:var(--navy);font-weight:600;min-height:86px;
}
.question.word{font-size:44px;display:flex;align-items:center}
.question .katex{font-size:1.02em}

.timer{position:relative;width:70px;height:70px;flex:none}
.timer svg{transform:rotate(-90deg)}
.timer .track{stroke:var(--line)}
.timer .run{stroke:var(--copper);transition:stroke-dashoffset 1s linear, stroke .3s}
.timer.low .run{stroke:var(--red)}
.timer .num{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-size:22px;font-weight:700;color:var(--navy);font-variant-numeric:tabular-nums;
}
.timer.done{opacity:.25}

/* free response */
.answer-input{
  width:100%;font:inherit;font-size:19px;padding:15px 17px;
  border:1.5px solid var(--line);border-radius:11px;
  background:var(--parchment);color:var(--ink);
}
.answer-input:focus{outline:none;border-color:var(--copper);background:var(--paper)}
.answer-input:disabled{opacity:.7;background:var(--parchment)}
.check-btn{margin-top:12px}

/* multiple choice */
.options{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:560px){.options{grid-template-columns:1fr}}
.opt{
  font:inherit;font-size:18px;font-weight:600;text-align:left;
  padding:17px 20px;border-radius:11px;cursor:pointer;
  border:1.5px solid var(--line);background:var(--parchment);color:var(--navy);
  display:flex;align-items:center;gap:13px;
  transition:border-color .12s, background .12s, transform .06s;
}
.opt:hover:not(:disabled){border-color:var(--copper);background:var(--paper)}
.opt:active:not(:disabled){transform:translateY(1px)}
.opt:disabled{cursor:default}
.opt .key{
  flex:none;width:24px;height:24px;border-radius:6px;
  background:var(--paper);border:1px solid var(--line);
  font-size:12px;font-weight:700;color:var(--muted);
  display:flex;align-items:center;justify-content:center;
}
.opt.is-correct{border-color:var(--green);background:var(--green-bg);color:var(--green)}
.opt.is-correct .key{border-color:var(--green);color:var(--green)}
.opt.is-wrong{border-color:var(--red);background:var(--red-bg);color:var(--red)}
.opt.is-wrong .key{border-color:var(--red);color:var(--red)}
.opt.dimmed{opacity:.45}

.verdict-line{
  margin-top:22px;font-size:17px;font-weight:600;
  display:flex;align-items:center;gap:10px;
}
.verdict-line.right{color:var(--green)}
.verdict-line.wrong{color:var(--red)}
.verdict-line .mark{
  width:26px;height:26px;border-radius:50%;flex:none;
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:15px;font-weight:700;
}
.verdict-line.right .mark{background:var(--green)}
.verdict-line.wrong .mark{background:var(--red)}

/* reveal / self-eval */
.reveal{margin-top:24px;border-top:1px solid var(--line);padding-top:22px}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:22px}
@media(max-width:620px){.compare{grid-template-columns:1fr}}
.box{border:1px solid var(--line);border-radius:11px;padding:15px 17px;background:var(--parchment)}
.box .lbl2{font-size:11px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin-bottom:7px}
.box .val{font-size:19px;color:var(--ink);word-break:break-word;min-height:28px}
.box.correct{border-color:var(--green);background:var(--green-bg)}
.box.correct .lbl2{color:var(--green)}
.box.correct .val{font-weight:600;color:var(--navy)}
.box .val.blank{color:var(--muted);font-style:italic;font-size:15px}

.verdict{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.verdict .hint{margin:0}

.note{
  margin-top:18px;font-size:13px;color:#7A5B2E;background:#FDF6E9;
  border:1px solid #EBD9B4;border-left:3px solid var(--copper);
  border-radius:8px;padding:11px 14px;
}

/* summary */
.score{display:flex;gap:34px;flex-wrap:wrap;margin:6px 0 28px}
.stat .n{
  font-family:"Cormorant Garamond",Georgia,serif;
  font-size:46px;font-weight:600;color:var(--navy);line-height:1;
  font-variant-numeric:tabular-nums;
}
.stat .k{font-size:12px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin-top:6px}
.stat.good .n{color:var(--green)}
.stat.bad .n{color:var(--red)}

.missed-list{list-style:none;padding:0;margin:0 0 28px;border-top:1px solid var(--line)}
.missed-list li{padding:15px 0;border-bottom:1px solid var(--line)}
.missed-list .mq{font-family:"Cormorant Garamond",Georgia,serif;font-size:19px;color:var(--navy);font-weight:600}
.missed-list .ma{font-size:15px;color:var(--muted);margin-top:5px}
.missed-list .ma b{color:var(--green);font-weight:600}
[hidden]{display:none !important}