/* ============================================================================
   THE PRACTICE APP

   Two views in one page — build a set, then work through it — because moving
   between them is constant and a navigation is a page load you would feel.
   ========================================================================= */

/* ---- app bar ------------------------------------------------------------ */
.bar{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:clamp(12px,2vw,26px);
  padding:12px var(--gut);
  background:var(--canvas);border-bottom:1px solid var(--rule);
}
.bar-brand{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);flex:none}
.bar-brand b{font-family:var(--body);font-weight:600;font-size:15px;letter-spacing:-.01em}
.bar-brand svg{width:20px;height:20px}
@media (max-width:620px){ .bar-brand b{display:none} }

.tally{display:flex;gap:clamp(10px,1.6vw,22px);margin-right:auto;flex-wrap:wrap}
.tally span{font-family:var(--mono);font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3);white-space:nowrap}
.tally b{color:var(--ink);font-weight:500}
@media (max-width:760px){ .tally span[data-opt]{display:none} }

.seg{display:flex;border:1px solid var(--rule-strong)}
.seg button{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;
  padding:7px 13px;background:none;border:0;cursor:pointer;color:var(--ink-3);
  transition:background .25s var(--ease),color .25s var(--ease);
}
.seg button+button{border-left:1px solid var(--rule-strong)}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--canvas)}
.seg button:hover:not([aria-pressed="true"]){color:var(--ink)}

/* ---- builder ------------------------------------------------------------ */
.build{max-width:920px;margin:0 auto;padding:clamp(34px,6vh,64px) var(--gut) 90px}
.build h1{font-size:clamp(30px,4.6vw,52px);margin:10px 0 12px}
.build .lede{margin-bottom:clamp(30px,5vh,46px)}

fieldset{border:0;padding:0;margin:0 0 clamp(26px,4vh,38px)}
legend{
  font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-3);padding:0 0 11px;width:100%;border-bottom:1px solid var(--rule);margin-bottom:15px;
}

.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{position:relative}
.chip input{position:absolute;opacity:0;width:100%;height:100%;margin:0;cursor:pointer}
.chip span{
  display:inline-flex;align-items:center;gap:7px;
  font-family:var(--mono);font-size:11px;letter-spacing:.07em;text-transform:uppercase;
  padding:9px 14px;border:1px solid var(--rule-strong);color:var(--ink-2);
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.chip input:checked + span{background:var(--ink);color:var(--canvas);border-color:var(--ink)}
.chip input:focus-visible + span{outline:2px solid var(--ink);outline-offset:2px}
.chip input:hover:not(:checked) + span{border-color:var(--ink)}
.chip .n{opacity:.62;font-size:10px}

/* Difficulty chips wear the sequential ramp, but only on the border and text —
   a solid fill would fight the selected state, which is the ink block. */
.chip.easy   span{border-color:var(--diff-easy);color:var(--diff-easy)}
.chip.medium span{border-color:var(--diff-medium);color:var(--diff-medium)}
.chip.hard   span{border-color:var(--diff-hard);color:var(--diff-hard)}
.chip.easy   input:checked + span{background:var(--diff-easy);border-color:var(--diff-easy);color:var(--canvas)}
.chip.medium input:checked + span{background:var(--diff-medium);border-color:var(--diff-medium);color:var(--canvas)}
.chip.hard   input:checked + span{background:var(--diff-hard);border-color:var(--diff-hard);color:var(--canvas)}

.dgroup{margin-bottom:16px}
.dgroup>.chips{margin-bottom:9px}
.skills{display:flex;flex-wrap:wrap;gap:7px;padding-left:15px;border-left:2px solid var(--rule)}
.skills .chip span{font-size:10px;padding:6px 11px;letter-spacing:.05em;text-transform:none}

.row{display:flex;flex-wrap:wrap;gap:22px;align-items:flex-end}
.num{display:flex;flex-direction:column;gap:8px}
.num label{font-family:var(--mono);font-size:10.5px;letter-spacing:.11em;text-transform:uppercase;color:var(--ink-3)}
.num input{
  width:120px;padding:10px 12px;background:var(--panel);color:var(--ink);
  border:1px solid var(--rule-strong);font-family:var(--mono);font-size:14px;
}
.num input:focus{outline:2px solid var(--ink);outline-offset:1px}

.toggle{display:flex;align-items:center;gap:11px;cursor:pointer;user-select:none}
.toggle input{width:16px;height:16px;accent-color:var(--ink);cursor:pointer}
.toggle .tx{font-size:14px;color:var(--ink-2)}

/* ---- the start bar sticks, because the counts above it change as you filter
   and the button is what you are reaching for while they do -------------- */
.go{
  position:sticky;bottom:0;margin-top:30px;padding:16px 0;
  background:linear-gradient(to top,var(--canvas) 62%,rgba(var(--canvas-rgb),0));
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;
}
.go .count{font-family:var(--mono);font-size:11.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3);margin-right:auto}
.go .count b{color:var(--ink);font-weight:500}
.go .count.none{color:var(--wrong)}

/* ---- session ------------------------------------------------------------ */
.sess{max-width:820px;margin:0 auto;padding:clamp(22px,4vh,40px) var(--gut) 120px}

.prog{display:flex;align-items:center;gap:16px;margin-bottom:clamp(20px,3.4vh,30px)}
.prog .track{flex:1;height:2px;background:var(--rule);position:relative;overflow:hidden}
.prog .fill{position:absolute;inset:0 auto 0 0;background:var(--ink);transition:width .45s var(--ease)}
.prog .pos,.prog .clock{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--ink-3);white-space:nowrap}
.prog .clock.low{color:var(--wrong)}

.qhead{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:18px}
.qhead .skill{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);margin-right:auto}
.mark{
  display:inline-flex;align-items:center;gap:7px;background:none;border:1px solid var(--rule-strong);
  font-family:var(--mono);font-size:10px;letter-spacing:.11em;text-transform:uppercase;
  padding:5px 11px;cursor:pointer;color:var(--ink-3);
  transition:color .25s var(--ease),border-color .25s var(--ease);
}
.mark:hover{color:var(--ink);border-color:var(--ink)}
.mark[aria-pressed="true"]{color:var(--ink);border-color:var(--ink)}
.mark svg{width:12px;height:12px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linejoin:round}
.mark[aria-pressed="true"] svg{fill:currentColor}

.stim{
  background:var(--panel);border:1px solid var(--rule);padding:clamp(18px,2.6vw,26px);
  margin-bottom:22px;font-size:clamp(15px,1.06vw,16.5px);line-height:1.68;
}
.prompt{font-size:clamp(16px,1.16vw,18px);line-height:1.6;margin-bottom:22px;white-space:pre-wrap}

.opts{display:flex;flex-direction:column;gap:9px;margin-bottom:24px}
.opt{position:relative}
.opt input{position:absolute;opacity:0;width:100%;height:100%;margin:0;cursor:pointer}
.opt .face{
  display:flex;gap:14px;align-items:flex-start;padding:14px 16px;
  border:1px solid var(--rule-strong);cursor:pointer;
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.opt .ltr{
  font-family:var(--mono);font-size:12px;width:24px;height:24px;flex:none;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--rule-strong);border-radius:999px;
}
.opt .bd{flex:1;line-height:1.55}
.opt input:hover:not(:disabled) + .face{border-color:var(--ink)}
.opt input:checked + .face{border-color:var(--ink);background:var(--panel)}
.opt input:checked + .face .ltr{background:var(--ink);color:var(--canvas);border-color:var(--ink)}
.opt input:focus-visible + .face{outline:2px solid var(--ink);outline-offset:2px}
.opt input:disabled + .face{cursor:default}

/* Marked-up state after answering. Colour is never the only signal — the
   correct row gains a rule and a word, the chosen-wrong row gains both too. */
.opt.is-correct .face{border-color:var(--correct);background:var(--correct-soft)}
.opt.is-correct .ltr{background:var(--correct);color:var(--canvas);border-color:var(--correct)}
.opt.is-wrong .face{border-color:var(--wrong);background:var(--wrong-soft)}
.opt.is-wrong .ltr{background:var(--wrong);color:var(--canvas);border-color:var(--wrong)}
.opt .tagv{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;
  align-self:center;flex:none;
}
.opt.is-correct .tagv{color:var(--correct)}
.opt.is-wrong .tagv{color:var(--wrong)}

.spr{display:flex;flex-direction:column;gap:9px;margin-bottom:24px;max-width:320px}
.spr label{font-family:var(--mono);font-size:10.5px;letter-spacing:.11em;text-transform:uppercase;color:var(--ink-3)}
.spr input{
  padding:14px 16px;background:var(--panel);color:var(--ink);
  border:1px solid var(--rule-strong);font-family:var(--mono);font-size:19px;
}
.spr input:focus{outline:2px solid var(--ink);outline-offset:1px}
.spr input:disabled{opacity:.75}
.spr.is-correct input{border-color:var(--correct);background:var(--correct-soft)}
.spr.is-wrong input{border-color:var(--wrong);background:var(--wrong-soft)}

/* ---- hints and rationale ------------------------------------------------ */
.hintbox{border-left:2px solid var(--diff-medium);background:var(--diff-easy-soft);
         padding:14px 18px;margin-bottom:20px}
.hintbox p{font-size:14.5px;color:var(--ink-2);margin:0}
.hintbox .hl{font-family:var(--mono);font-size:10px;letter-spacing:.13em;text-transform:uppercase;
             color:var(--diff-medium);display:block;margin-bottom:6px}

.expl{border-top:1px solid var(--rule);margin-top:26px;padding-top:24px}
.expl .verdict{margin-bottom:14px}
.expl h4{font-family:var(--mono);font-size:10.5px;font-weight:500;letter-spacing:.13em;text-transform:uppercase;
         color:var(--ink-3);margin:24px 0 10px}
.expl .why{font-size:15.5px;line-height:1.65;color:var(--ink)}
.expl .each{display:flex;flex-direction:column;gap:9px}
.expl .each .r{display:flex;gap:12px;font-size:14px;line-height:1.6;color:var(--ink-2)}
.expl .each .r .k{font-family:var(--mono);font-size:11.5px;color:var(--ink-3);flex:none;width:18px;padding-top:2px}
.expl .each .r.right .k{color:var(--correct)}

.acts{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:28px}
.acts .sp{margin-left:auto}

/* ---- end card ----------------------------------------------------------- */
.done{max-width:640px;margin:0 auto;padding:clamp(40px,8vh,90px) var(--gut) 120px;text-align:center}
.done h2{margin-bottom:14px}
.done .score{font-family:var(--display);font-size:clamp(62px,12vw,110px);line-height:1;margin:22px 0 6px}
.done .of{font-family:var(--mono);font-size:11.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--ink-3)}
.done .bd{display:flex;justify-content:center;gap:clamp(18px,4vw,44px);margin:34px 0 36px;flex-wrap:wrap}
.done .bd div{display:flex;flex-direction:column;gap:5px}
.done .bd b{font-family:var(--mono);font-size:22px;font-weight:400}
.done .bd span{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3)}
.done .acts{justify-content:center}

.empty{padding:60px 0;text-align:center;color:var(--ink-3)}
.empty p{margin-bottom:18px}

/* ============================================================================
   THE DAY'S TASKS, AND THE SKILL BROWSER
   ========================================================================= */

.barlink{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;
  color:var(--ink-3);text-decoration:none;padding-bottom:2px;border-bottom:1px solid transparent;flex:none;
}
.barlink:hover{color:var(--ink);border-bottom-color:var(--ink)}
@media (max-width:820px){ .barlink{display:none} }

.inline{color:var(--ink);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.inline:hover{text-decoration-thickness:2px}

/* The builder is wider than it was, because the tasks sit beside it rather than
   under it — a list you have to scroll to is a list you stop keeping. */
.build{max-width:1120px}
.cols{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:clamp(28px,4vw,58px);align-items:start}
@media (max-width:900px){ .cols{grid-template-columns:1fr;gap:44px} }

.col-side{position:sticky;top:76px}
@media (max-width:900px){ .col-side{position:static} }

.tasks{border:1px solid var(--rule);background:var(--panel);padding:20px}
.tasks-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:6px}
.tdate{font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3)}
.tprog{font-family:var(--mono);font-size:11px;letter-spacing:.07em;color:var(--ink-2);margin:0 0 16px}
.tprog.all{color:var(--correct)}

.tadd{display:flex;gap:0;margin-bottom:16px}
.tadd input{
  flex:1;min-width:0;padding:10px 12px;background:var(--canvas);color:var(--ink);
  border:1px solid var(--rule-strong);border-right:0;font-family:var(--body);font-size:13.5px;
}
.tadd input:focus{outline:2px solid var(--ink);outline-offset:-2px;position:relative;z-index:1}
.tadd button{
  flex:none;width:42px;background:var(--ink);color:var(--canvas);border:1px solid var(--ink);
  font-family:var(--mono);font-size:17px;line-height:1;cursor:pointer;
  transition:background .25s var(--ease),color .25s var(--ease);
}
.tadd button:hover{background:transparent;color:var(--ink)}

.tlist{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.tlist li{display:flex;gap:11px;align-items:flex-start;padding:11px 0;border-top:1px solid var(--rule)}
.tlist li:first-child{border-top:0}
.tlist input[type="checkbox"]{width:15px;height:15px;margin:2px 0 0;accent-color:var(--correct);cursor:pointer;flex:none}
.tlist .tx{flex:1;font-size:13.5px;line-height:1.5;color:var(--ink);word-break:break-word}
.tlist li.done .tx{color:var(--ink-3);text-decoration:line-through}
.tlist .del{
  flex:none;background:none;border:0;cursor:pointer;color:var(--ink-3);padding:0 2px;
  font-family:var(--mono);font-size:15px;line-height:1;opacity:0;transition:opacity .2s var(--ease),color .2s var(--ease);
}
.tlist li:hover .del,.tlist .del:focus-visible{opacity:1}
.tlist .del:hover{color:var(--wrong)}
@media (pointer:coarse){ .tlist .del{opacity:1} }

.tempty{font-size:12.5px;line-height:1.6;color:var(--ink-3);margin:0}
.tclear{
  margin-top:14px;background:none;border:0;padding:0;cursor:pointer;color:var(--ink-3);
  font-family:var(--mono);font-size:10px;letter-spacing:.11em;text-transform:uppercase;
}
.tclear:hover{color:var(--ink)}

/* ---- skill browser ------------------------------------------------------ */
.browse{max-width:940px;margin:0 auto;padding:clamp(34px,6vh,64px) var(--gut) 90px}
.browse h1{font-size:clamp(30px,4.6vw,52px);margin:10px 0 12px}
.browse .lede{margin-bottom:clamp(30px,5vh,44px)}

.bdom{margin-bottom:34px}
.bdom h3{
  display:flex;align-items:baseline;gap:12px;font-family:var(--body);font-weight:500;
  font-size:15px;letter-spacing:.01em;margin:0 0 4px;padding-bottom:11px;border-bottom:1px solid var(--rule);
}
.bdom h3 .sw{width:9px;height:9px;border-radius:2px;flex:none}
.bdom h3 .tot{margin-left:auto;font-family:var(--mono);font-size:11px;letter-spacing:.09em;color:var(--ink-3)}

.brow{
  display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:clamp(12px,2vw,24px);
  align-items:center;padding:13px 0;border-bottom:1px solid var(--rule);
}
.brow .nm{font-size:14.5px;color:var(--ink);min-width:0}
.brow .bars{display:flex;gap:3px;align-items:center}
/* A 3-step sequential ramp, so the bar reads as a difficulty mix at a glance.
   Each segment carries its count as a label, so the colour is never the only
   thing saying what it is. */
.brow .seg3{display:flex;align-items:center;gap:5px;font-family:var(--mono);font-size:10px;color:var(--ink-3)}
.brow .seg3 i{width:8px;height:8px;border-radius:2px;display:block}
.brow .seg3.e i{background:var(--diff-easy)}
.brow .seg3.m i{background:var(--diff-medium)}
.brow .seg3.h i{background:var(--diff-hard)}
.brow .drill{
  font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;
  background:none;border:1px solid var(--rule-strong);color:var(--ink-2);padding:7px 13px;cursor:pointer;white-space:nowrap;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.brow .drill:hover{background:var(--ink);color:var(--canvas);border-color:var(--ink)}
@media (max-width:640px){
  .brow{grid-template-columns:minmax(0,1fr) auto;row-gap:9px}
  .brow .bars{grid-column:1;gap:12px}
  .brow .drill{grid-column:2;grid-row:1}
}