/* ClueGym · "Marked up": the printed puzzle page after a solver has been at it with a pen.
   Layout: one clue per screen, phone first; at ≥960px the clue desk takes 7 of 12 columns and the grid corner the other 5.
   Tokens from design/brief.md §4 (validated with dataviz validate_palette.js, 2026-10-26). */
@font-face{font-family:"Newsreader";src:url(fonts/newsreader-latin.woff2) format("woff2");font-weight:400 600;font-style:normal;font-display:swap}
@font-face{font-family:"Newsreader";src:url(fonts/newsreader-italic-latin.woff2) format("woff2");font-weight:400 500;font-style:italic;font-display:swap}
@font-face{font-family:"Libre Franklin";src:url(fonts/libre-franklin-latin.woff2) format("woff2");font-weight:400 700;font-style:normal;font-display:swap}
@font-face{font-family:"Newsreader fallback";src:local("Georgia"),local("Liberation Serif"),local("Tinos"),local("Times New Roman"),local("DejaVu Serif");size-adjust:96%;ascent-override:92%}
@font-face{font-family:"Franklin fallback";src:local("Arial"),local("Liberation Sans"),local("Arimo"),local("Helvetica"),local("DejaVu Sans");size-adjust:101%}

:root{
  --paper:#f5f6f7; --sheet:#ffffff; --ink:#16181d; --ink-2:#575d69; --rule:#d5d9e0; --grid:#16181d; --block:#16181d;
  --on-block:#f5f6f7; --cell-on:#e1e6ef;
  --def:#2343b0; --def-text:#2343b0; --ind:#8a2d72; --ind-text:#8a2d72;
  --fodder:#b97800; --fodder-band:#ffe27a;
  --good:#00849c; --good-text:#006f84; --bad:#c0262d; --bad-text:#c0262d;
  --f-clue:"Newsreader","Newsreader fallback",Georgia,"Times New Roman",serif;
  --f-grid:"Libre Franklin","Franklin fallback","Franklin Gothic Medium","Arial Narrow",Arial,sans-serif;
  --ease:cubic-bezier(.2,.7,.2,1);
  --gut-l:max(16px, env(safe-area-inset-left, 0px)); --gut-r:max(16px, env(safe-area-inset-right, 0px));
  --cell:44px;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --paper:#11151c; --sheet:#1a1f29; --ink:#eceef1; --ink-2:#a3a9b5; --rule:#2e3542; --grid:#c9ced8; --block:#05070a;
  --on-block:#11151c; --cell-on:#27324a;
  --def:#5d78f0; --def-text:#8fa3f7; --ind:#c25aa8; --ind-text:#e47ccb;
  --fodder:#c08a10; --fodder-band:#5a4a12;
  --good:#1f9aa3; --good-text:#5fc4cc; --bad:#e0564e; --bad-text:#ff8a80;
  color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#11151c; --sheet:#1a1f29; --ink:#eceef1; --ink-2:#a3a9b5; --rule:#2e3542; --grid:#c9ced8; --block:#05070a;
  --on-block:#11151c; --cell-on:#27324a;
  --def:#5d78f0; --def-text:#8fa3f7; --ind:#c25aa8; --ind-text:#e47ccb;
  --fodder:#c08a10; --fodder-band:#5a4a12;
  --good:#1f9aa3; --good-text:#5fc4cc; --bad:#e0564e; --bad-text:#ff8a80;
  color-scheme:dark}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(101px + env(safe-area-inset-top,0px))}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.55 var(--f-grid);padding-top:env(safe-area-inset-top,0px)}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:30;background:var(--paper)}
[hidden]{display:none!important}
a{color:var(--ink);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
button{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--ink);outline-offset:2px}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.icon{width:20px;height:20px;flex:none;fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}

.frame{max-width:1120px;margin:0 auto;padding-left:var(--gut-l);padding-right:var(--gut-r)}

/* Header + tabs */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--paper);border-bottom:1px solid var(--rule)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;height:56px}
.wordmark{display:inline-flex;align-items:center;gap:8px;text-decoration:none;color:var(--ink);min-height:44px}
.wordmark svg.corner{width:24px;height:24px}
.wm{font-size:24px;line-height:1;white-space:nowrap;position:relative;padding-bottom:4px}
.wm-clue{font-family:var(--f-clue);font-weight:600;position:relative}
.wm-gym{font-family:var(--f-grid);font-weight:700;letter-spacing:-.01em}
.wm-clue svg{position:absolute;left:0;bottom:-6px;width:100%;height:6px;overflow:visible}
.wm-clue svg path{fill:none;stroke:var(--def);stroke-width:2.2;stroke-linecap:round}
.streak-wrap{position:relative}
.streak{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 4px 0 8px;background:none;border:0;cursor:pointer;font:600 15px/1 var(--f-grid);font-variant-numeric:tabular-nums}
.streak .glyph{width:14px;height:14px;border:1.5px solid var(--grid);display:inline-grid;place-items:center}
.streak.today .glyph{background:var(--block);border-color:var(--block)}
.streak .glyph svg{width:11px;height:11px;stroke:var(--on-block);stroke-width:3;fill:none;display:none}
:root[data-theme="dark"] .streak.today .glyph{background:var(--ink);border-color:var(--ink)}
.streak.today .glyph svg{display:block}
.streak.tick .glyph{animation:tickin .16s var(--ease)}
@keyframes tickin{from{transform:scale(.8)}to{transform:scale(1)}}
.pop{position:absolute;right:0;top:calc(100% + 4px);width:min(300px,calc(100vw - 32px));background:var(--sheet);border:1px solid var(--rule);padding:16px;font-size:15px;line-height:1.5;z-index:25;display:grid;gap:10px}
.pop p{margin:0}
.tabs{display:flex;gap:24px;height:44px}
.tabs a{display:inline-flex;align-items:center;min-height:44px;font:600 15px/1 var(--f-grid);text-decoration:none;color:var(--ink-2);border-bottom:3px solid transparent;padding-top:3px}
.tabs a[aria-current="true"]{color:var(--ink);border-bottom-color:var(--grid)}
.tabs a:hover{color:var(--ink)}

.banner{display:flex;gap:10px;align-items:flex-start;background:var(--sheet);border:1px solid var(--rule);padding:12px 14px;margin-top:12px;font-size:15px}

/* Sections */
section{padding-block:28px 48px;border-top:1px solid var(--rule)}
section#today{border-top:0;padding-top:20px}
h2{font:500 26px/1.2 var(--f-clue);margin:0 0 12px;text-wrap:balance}
h3{font:500 22px/1.25 var(--f-clue);margin:0;text-wrap:balance}
.eyebrow{font:600 12.5px/1.3 var(--f-grid);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2);margin:0}
.lede{max-width:62ch;margin:0 0 20px}
.small{font-size:14px;color:var(--ink-2)}
.measure{max-width:62ch}
.num{font-variant-numeric:tabular-nums}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 22px;border:1.5px solid var(--grid);background:var(--sheet);color:var(--ink);font:600 17px/1.1 var(--f-grid);text-decoration:none;cursor:pointer;border-radius:0;text-align:center}
.btn.primary{background:var(--block);border-color:var(--block);color:var(--on-block)}
:root[data-theme="dark"] .btn.primary{background:var(--ink);border-color:var(--ink);color:var(--paper)}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .btn.primary{background:var(--ink);border-color:var(--ink);color:var(--paper)}
  :root:not([data-theme="light"]) .streak.today .glyph{background:var(--ink);border-color:var(--ink)}}
.btn:hover:not(:disabled){box-shadow:inset 0 0 0 2px var(--paper)}
.btn.primary:hover:not(:disabled){box-shadow:inset 0 0 0 2px var(--paper), inset 0 0 0 3px var(--block)}
.btn:disabled{opacity:.4;cursor:not-allowed}
.link{background:none;border:0;padding:0;min-height:44px;display:inline-flex;align-items:center;gap:6px;cursor:pointer;color:var(--ink);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;font:inherit}
.row{display:flex;flex-wrap:wrap;gap:8px}

/* The clue desk */
.today-grid{display:grid;gap:24px}
.player{display:grid;gap:14px;min-width:0}
.clue-wrap{position:relative}
.clue{position:relative;z-index:1;margin:0;font:400 24px/1.9 var(--f-clue);color:var(--ink);overflow-wrap:break-word}
.clue .enum{color:var(--ink-2);white-space:nowrap}
.tok{display:inline-block;background:none;border:0;margin:0;padding:.24em 0;font:inherit;line-height:1.4;color:inherit;cursor:pointer;border-radius:0}
.tok[aria-pressed="true"]{text-decoration:underline dashed 1.5px var(--ink-2);text-underline-offset:.28em}
.tok:disabled{cursor:default}
.parsed .tok{cursor:default}
.marks{position:absolute;left:0;top:0;width:100%;height:100%;z-index:0;overflow:visible;pointer-events:none}
.marks .m-def{fill:none;stroke:var(--def);stroke-width:2.5;stroke-linecap:round}
.marks .m-def.dash{stroke-dasharray:6 4}
.marks .m-ind{fill:none;stroke:var(--ind);stroke-width:1.5}
.marks .m-ind.dots{stroke-dasharray:1.5 4;stroke-linecap:round;stroke-width:2.5}
.marks .m-band{fill:var(--fodder-band)}
.marks .m-edge{fill:var(--fodder)}
.marks .grow{transform-box:fill-box;transform-origin:0 50%}
.marks .anim.draw{stroke-dasharray:1;stroke-dashoffset:1;animation:draw .32s var(--ease) forwards}
.marks .anim.ring{stroke-dasharray:1;stroke-dashoffset:1;animation:draw .26s var(--ease) forwards}
.marks .anim.grow{animation:grow .2s var(--ease) both}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes grow{from{transform:scaleX(0)}to{transform:scaleX(1)}}

.prompt{display:grid;gap:4px;min-height:1px}
.prompt p{margin:0}
.instr{font:600 18px/1.35 var(--f-grid)}
.helper{color:var(--ink-2);font-size:16px;max-width:52ch}
.fb{font:400 19px/1.45 var(--f-clue)}
.fb q,.why q,.done q{quotes:"\201C" "\201D"}
.prompt .btn{justify-self:start;margin-top:8px}

/* The light */
.light-wrap{position:relative;display:flex;align-items:center;min-height:48px;max-width:100%;width:fit-content}
.light{display:flex;cursor:text;touch-action:manipulation}
.cell{position:relative;width:var(--cell);height:var(--cell);border:1.5px solid var(--grid);margin-left:-1.5px;background:var(--sheet);display:grid;place-items:center;font:600 calc(var(--cell) * .56)/1 var(--f-grid);text-transform:uppercase;color:var(--ink)}
.cell:first-child{margin-left:0}
.cell .n{position:absolute;left:2px;top:1px;font:600 10px/1 var(--f-grid);color:var(--ink)}
.cell.bar{border-right-width:3.5px}
.cell.bar + .cell{border-left-width:0;margin-left:0}
.cell.hy::after{content:"";position:absolute;right:-6.5px;top:50%;width:10px;height:2.5px;margin-top:-1.25px;background:var(--grid);z-index:2}
.light.focus .cell.cur{background:var(--cell-on)}
.cell.rev{color:var(--ink-2)}
.cell.rev::before{content:"";position:absolute;right:3px;top:3px;width:4px;height:4px;border-radius:50%;background:var(--ink-2)}
.cell .ch{display:block}
.light.miss{outline:2px dashed var(--bad);outline-offset:4px}
.light-input{position:absolute;inset:0;width:100%;height:100%;opacity:0;border:0;padding:0;font-size:16px;caret-color:transparent;background:transparent;color:transparent;cursor:text}
.light-wrap:focus-within{outline:3px solid var(--ink);outline-offset:4px}
.tickmark{margin-left:12px;color:var(--good);display:inline-flex}
.tickmark .icon{width:26px;height:26px;stroke-width:2.25}
.check-msg{margin:0;min-height:0;font-size:16px}
.check-msg.bad{color:var(--bad-text);display:flex;gap:8px;align-items:center}
.actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;max-width:420px}
.actions .btn{padding:0 8px;font-size:16px;height:48px;white-space:nowrap;min-width:0;gap:7px}
.actions .ico-stack{display:inline-grid;justify-items:center;gap:3px;margin-top:4px}
.actions .ico-stack .icon{width:19px;height:19px}
.pips{display:flex}
.pips i{width:6px;height:6px;border:1px solid currentColor;margin-left:-1px;display:block}
.pips i:first-child{margin-left:0}
.pips i.used{background:currentColor}
.hints{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.hints li{font:400 19px/1.45 var(--f-clue)}
.confirm{background:var(--sheet);border:1px solid var(--rule);padding:14px 16px;display:grid;gap:10px;max-width:520px}
.confirm p{margin:0}
.start-course{margin:0}
.start-course a{display:inline-flex;align-items:center;min-height:44px}

.outcome{display:grid;gap:12px}
.solved-line{display:flex;gap:8px;align-items:center;margin:0;font:500 22px/1.3 var(--f-clue);color:var(--good-text)}
.solved-line .ans,.why .ans,.done .ans{font-family:var(--f-grid);font-weight:600;letter-spacing:.04em;font-size:.86em}
.solved-line.missed{color:var(--ink)}
.outcome .small{margin:-6px 0 0}
.working{display:grid;gap:4px;border-top:1px solid var(--rule);padding-top:12px}
.working-line{margin:0;font:400 19px/1.55 var(--f-clue);overflow-wrap:anywhere}
.w-caps{font-family:var(--f-grid);font-weight:600;letter-spacing:.03em}
.w-ind{font-style:italic;color:var(--ind-text)}
.w-def{text-decoration:underline 2.5px var(--def);text-underline-offset:4px}
.w-mark{background:linear-gradient(to bottom,transparent 30%,var(--fodder-band) 30%,var(--fodder-band) 88%,var(--fodder) 88%,var(--fodder) 96%,transparent 96%);color:var(--ink)}
.why{background:var(--sheet);border:1px solid var(--rule);padding:20px;display:grid;gap:10px}
.why h3{display:flex;gap:8px;align-items:center}
.why h3 .icon{color:var(--bad);width:22px;height:22px}
.why p{margin:0}
.why .working-line{font-size:18px}
.why .why-ex{font:400 19px/1.5 var(--f-clue);max-width:56ch}
.why.solved{padding:16px 20px}
.next{justify-self:start}

/* Today done */
.done{display:grid;gap:8px;border-top:1px solid var(--rule);padding-top:16px}
.done p{margin:0}
.done-line{font:500 24px/1.3 var(--f-clue)}
.keep{font:600 12.5px/1.3 var(--f-grid);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2);margin:12px 0 0}
.keep-links{display:flex;flex-wrap:wrap;gap:4px 20px}
.keep-links .link{font-weight:600}

/* Grid corner (desktop) */
.corner-grid{display:none}
.corner-grid svg{width:100%;height:auto;display:block}
.corner-grid .w{fill:var(--sheet);stroke:var(--grid);stroke-width:1.5}
.corner-grid .b{fill:var(--block);stroke:var(--grid);stroke-width:1.5}
.corner-grid .on{fill:var(--cell-on)}
.corner-grid .cn{font:600 9px var(--f-grid);fill:var(--ink)}
.corner-grid .cl{font:600 22px var(--f-grid);fill:var(--ink);text-anchor:middle;dominant-baseline:central}
.corner-grid .cl.rev{fill:var(--ink-2)}

/* How it works */
.how p{max-width:62ch;margin:0 0 10px;font:400 19px/1.55 var(--f-clue)}
.k-def{text-decoration:underline 2.5px var(--def);text-underline-offset:5px}
.k-fod{background:linear-gradient(to bottom,transparent 30%,var(--fodder-band) 30%,var(--fodder-band) 88%,var(--fodder) 88%,var(--fodder) 96%,transparent 96%)}
.k-ind{border:1.5px solid var(--ind);border-radius:50%;padding:0 .3em;margin:0 -.1em}

/* Course list */
.progress{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 16px;margin:0 0 8px}
.progress .p1{font:600 17px var(--f-grid);font-variant-numeric:tabular-nums}
.levels,.types{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.levels li,.types li{border-bottom:1px solid var(--rule)}
.lv{display:grid;grid-template-columns:72px minmax(0,1fr) auto;align-items:center;gap:4px 12px;width:100%;min-height:64px;padding:10px 4px;background:none;border:0;text-align:left;cursor:pointer;color:var(--ink)}
.lv:hover,.ty:hover{background:var(--sheet)}
.lv .lno{font:600 14px var(--f-grid);color:var(--ink-2)}
.lv .lname{font:500 20px/1.25 var(--f-clue)}
.lv .lcount{font-size:14px;color:var(--ink-2);font-variant-numeric:tabular-nums}
.lv .lstate{display:inline-flex;align-items:center;gap:6px;font:600 15px var(--f-grid);font-variant-numeric:tabular-nums;justify-self:end}
.lv .lstate .icon{width:18px;height:18px}
.lv .mid{display:grid;gap:4px;min-width:0}
.strip{display:flex;flex-wrap:wrap;gap:0}
.strip i{width:var(--sc,22px);height:var(--sc,22px);border:1.5px solid var(--grid);margin-left:-1.5px;display:inline-grid;place-items:center;background:var(--sheet);position:relative}
.strip i:first-child{margin-left:0}
.strip i svg{width:70%;height:70%;fill:none;stroke:var(--ink);stroke-width:3}
.strip i.clean{background:var(--block)}
.strip i.clean svg{stroke:var(--on-block)}
.strip i.miss::after{content:"";position:absolute;left:50%;top:-2px;bottom:-2px;width:2px;background:var(--bad);transform:rotate(45deg)}
.strip i.todo{background:var(--sheet)}
.strip.mini{--sc:12px}
.strip.mini i{border-width:1px;margin-left:-1px}
.strip.mini i svg{display:none}
.strip.mini i.miss::after{width:1.5px}

/* Level intro + results */
.view{display:grid;gap:16px}
.intro h3{font:500 30px/1.15 var(--f-clue)}
.intro p.para{max-width:62ch;margin:0}
.example{border-left:0;background:var(--sheet);border:1px solid var(--rule);padding:14px 16px;max-width:520px}
.example .working-line{font-size:20px}
.results h3{font:500 26px/1.2 var(--f-clue)}
.results p{margin:0}
.missed{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.missed li{border-bottom:1px solid var(--rule);padding:10px 0;display:grid;gap:4px}
.missed .mclue{font:400 19px/1.45 var(--f-clue)}

/* Practise */
.mix{margin:0 0 16px}
.ty{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:2px 12px;width:100%;min-height:72px;padding:12px 4px;background:none;border:0;text-align:left;cursor:pointer;color:var(--ink)}
.ty .tname{font:500 20px/1.25 var(--f-clue)}
.ty .tline{font-size:15px;color:var(--ink-2)}
.ty .tcount{font-size:14px;color:var(--ink-2);font-variant-numeric:tabular-nums}
.ty .mid{display:grid;gap:2px;min-width:0}
.ty .chev{color:var(--ink-2);display:inline-flex}

/* Offer */
.offer{background:var(--sheet);border:2px solid var(--grid);padding:24px;display:grid;gap:14px;max-width:760px}
.offer h3{font:500 26px/1.2 var(--f-clue)}
.offer p{margin:0;max-width:56ch}
.offer .btn{justify-self:start}
.capture{display:grid;gap:8px;margin-top:28px;max-width:560px}
.capture h3{font:500 20px/1.25 var(--f-clue)}
.capture p{margin:0;font-size:15px;color:var(--ink-2)}
.capture .btn{justify-self:start;min-height:44px;font-size:15px}

/* Questions */
.faq{max-width:760px;border-top:1px solid var(--rule)}
.faq details{border-bottom:1px solid var(--rule)}
.faq summary{list-style:none;cursor:pointer;min-height:52px;display:flex;align-items:center;justify-content:space-between;gap:12px;font:500 19px/1.3 var(--f-clue);padding:8px 0}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";width:9px;height:9px;border-right:2px solid var(--ink);border-bottom:2px solid var(--ink);transform:rotate(45deg);flex:none;margin-right:6px;transition:transform .16s var(--ease)}
.faq details[open] summary::after{transform:rotate(225deg)}
.faq .a{padding:0 0 16px;max-width:62ch;display:grid;gap:10px}
.faq .a p{margin:0}

/* Footer */
footer{border-top:1px solid var(--rule);padding-block:28px 40px;font-size:14px;color:var(--ink-2)}
footer .lines{display:grid;gap:8px;max-width:72ch;margin-top:12px}
footer p{margin:0}
footer a{color:var(--ink-2)}
footer .wordmark .wm{font-size:20px}
footer .wordmark svg.corner{width:20px;height:20px}

/* Flying letters (the build) */
.fly{position:fixed;z-index:40;pointer-events:none;font:600 22px/1 var(--f-grid);color:var(--ink);text-transform:uppercase;display:grid;place-items:center}

@media (min-width:640px){
  .clue{font-size:28px}
  h2{font-size:30px}
}
@media (min-width:960px){
  body{font-size:17px}
  section{padding-block:40px 64px}
  section#today{padding-top:32px}
  .clue{font-size:32px;line-height:1.75}
  h2{font-size:34px}
  .intro h3{font-size:40px}
  .today-grid{grid-template-columns:7fr 5fr;gap:48px;align-items:start}
  .corner-grid{display:block;padding-top:36px}
  .split{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
  .types{display:grid;grid-template-columns:1fr 1fr;column-gap:32px;border-top:0}
  .types li:nth-child(-n+2){border-top:1px solid var(--rule)}
  .working-line{font-size:22px}
  .offer{padding:32px}
  .offer h3{font-size:30px}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-delay:0ms!important;transition-duration:.001ms!important}
}