/* Tool pages: Sudoku solver, Cube solver, Cube guide. They share the look of core.css. */
.tp{padding:14px 0 40px}
.tp h2{font-family:var(--serif);font-size:30px;margin:6px 0 4px}
.tp h3{font-family:var(--serif);font-size:21px;margin:22px 0 6px}
.tp p,.tp li{line-height:1.55;font-size:16px}
.tp .lead{color:var(--muted);max-width:70ch;margin:0 0 12px}
.tp .cols{display:grid;grid-template-columns:minmax(0,520px) minmax(240px,420px);gap:24px;align-items:start}
.tp .panel{margin-bottom:14px}
.tp .actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.tp .actions .btn{justify-content:center;text-align:center;font-size:15px}
.tp .actions .wide{grid-column:1/-1}
.tp .say{min-height:44px;background:rgba(0,0,0,.28);border-radius:10px;padding:10px 12px;font-size:15px;line-height:1.45;color:#fff}
.tp .say.bad{background:#7a1d1d}
.tp .say.good{background:#14502a}
.tp .tag2{display:inline-block;background:var(--gold);color:#3a2c00;font-weight:700;font-size:12px;border-radius:999px;padding:2px 9px;margin-left:6px}
/* sudoku solver grid */
.sgrid2{display:grid;grid-template-columns:repeat(3,1fr) 2px repeat(3,1fr) 2px repeat(3,1fr);grid-template-rows:repeat(3,1fr) 2px repeat(3,1fr) 2px repeat(3,1fr);background:#0a2a12;padding:6px;border-radius:10px;aspect-ratio:1/1;max-width:520px;width:100%;gap:0}
.sgrid2 .sp{background:#0a2a12}
.sc2{background:#fff;color:#111;border:1px solid #b9c6bb;display:grid;place-items:center;font-family:var(--serif);font-size:clamp(20px,6vw,34px);font-weight:700;cursor:pointer;padding:0;border-radius:0;position:relative}
.sc2.peer{background:#e9f2ea}
.sc2.on{background:#ffe27a}
.sc2.bad{background:#ffb4b4;color:#7a0000}
.sc2.fill{color:#0b5cad;font-weight:400}
.sc2.new{animation:pop .5s ease}
@keyframes pop{0%{background:#7ee08f}100%{}}
.nums2{display:grid;grid-template-columns:repeat(9,1fr);gap:4px;max-width:520px}
.nums2 button{border:0;border-bottom:4px solid rgba(0,0,0,.3);border-radius:8px;background:#fff;color:#111;font-family:var(--serif);font-size:24px;font-weight:700;padding:10px 0 6px}
.nums2 button.er{background:var(--undo);color:#3b1d00;font-size:14px;font-family:var(--sans)}
@media (max-width:820px){.tp .cols{grid-template-columns:1fr}.tp h2{font-size:25px}}
/* cube */
.cnet{display:grid;grid-template-columns:repeat(4,auto);gap:6px;justify-content:start}
.cface{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:#0a2a12;padding:2px;border-radius:6px;width:clamp(60px,20vw,124px)}
.cface i{aspect-ratio:1/1;display:block;border-radius:2px;border:0;background:#888;padding:0}
.cface button{aspect-ratio:1/1;display:block;border-radius:2px;border:1px solid rgba(0,0,0,.35);padding:0;cursor:pointer}
.cface b{display:none}
.cface .ctr{outline:2px solid #000;outline-offset:-2px}
.cnet .sp0{visibility:hidden}
.cpal{display:flex;gap:8px;flex-wrap:wrap}
.cpal button{width:44px;height:44px;border-radius:50%;border:3px solid rgba(255,255,255,.35);cursor:pointer;padding:0}
.cpal button[aria-pressed="true"]{border-color:#fff;box-shadow:0 0 0 3px var(--gold)}
.moves{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}
.moves span{background:rgba(255,255,255,.16);border-radius:6px;padding:5px 9px;font-family:var(--serif);font-size:18px;font-weight:700;min-width:36px;text-align:center}
.moves span.now{background:var(--gold);color:#3a2c00}
.moves span.done{opacity:.45}
.alg{font-family:var(--serif);font-size:20px;font-weight:700;background:rgba(0,0,0,.3);border-radius:8px;padding:8px 12px;display:inline-block;margin:4px 0}
.guide section{margin-bottom:8px}
.guide table{border-collapse:collapse;width:100%;max-width:760px}
.guide th,.guide td{border-bottom:1px solid rgba(255,255,255,.18);padding:7px 10px;text-align:left;vertical-align:top;font-size:15px}
.guide .lesson{background:rgba(0,0,0,.22);border-radius:10px;padding:12px 16px;margin:12px 0}
.guide .mini{display:inline-grid;vertical-align:middle}

@media (max-width:700px){.tp{padding-left:10px;padding-right:10px}}

.tp .panel .btn{margin-top:0}
.tp .actions{margin-top:0}
.cases{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px;margin:10px 0}
.case{display:flex;gap:12px;align-items:center;background:rgba(0,0,0,.22);border-radius:10px;padding:10px 12px}
.dia{display:grid;grid-template-columns:repeat(5,16px);grid-template-rows:repeat(5,16px);gap:2px;background:#0a2a12;padding:3px;border-radius:6px;flex:none}
.dia i{display:block;border-radius:2px;border:1px solid rgba(0,0,0,.45)}
.dia i.e{border:0;background:transparent}
.ct{min-width:0}
.ct .alg{font-size:16px;padding:4px 8px;margin:6px 0 0;word-break:break-word}
.actions .btn[aria-pressed="true"]{outline:3px solid var(--gold);outline-offset:2px}
.ct b{display:block;font-size:15px}

/* 3D cube for colouring and turning */
.cpal{gap:10px}
.cpal .pw{display:flex;flex-direction:column;align-items:center;gap:3px;font-size:12px;color:var(--muted)}
.cpal .pw.bad{color:var(--gold);font-weight:700}
.stage3{--s:min(54vw,240px);--u:calc(var(--s)/3);perspective:1000px;width:100%;height:calc(var(--s)*1.62);display:grid;place-items:center;touch-action:none;cursor:grab;user-select:none;-webkit-user-select:none;margin-top:6px}
.cube3{width:var(--s);height:var(--s);position:relative;transform-style:preserve-3d;transform:rotateX(var(--rx,-28deg)) rotateY(var(--ry,-38deg));transition:transform .55s ease}
.cube3.drag{transition:none}
.cube3 .layer{position:absolute;inset:0;transform-style:preserve-3d}
.cubie{position:absolute;left:50%;top:50%;width:0;height:0;transform-style:preserve-3d}
.cubie i,.cubie button{position:absolute;display:block;backface-visibility:hidden;-webkit-backface-visibility:hidden}
.cubie i{width:var(--u);height:var(--u);left:calc(var(--u)/-2);top:calc(var(--u)/-2);background:#0c0c0c}
.cubie button{width:calc(var(--u)*.86);height:calc(var(--u)*.86);left:calc(var(--u)*-.43);top:calc(var(--u)*-.43);border:0;padding:0;border-radius:calc(var(--u)*.14);cursor:pointer;font:700 calc(var(--u)*.5) Arial,sans-serif;display:grid;place-items:center}
.cubie .k-U{transform:rotateX(90deg) translateZ(calc(var(--u)/2))}
.cubie .k-D{transform:rotateX(-90deg) translateZ(calc(var(--u)/2))}
.cubie .k-F{transform:translateZ(calc(var(--u)/2))}
.cubie .k-B{transform:rotateY(180deg) translateZ(calc(var(--u)/2))}
.cubie .k-R{transform:rotateY(90deg) translateZ(calc(var(--u)/2))}
.cubie .k-L{transform:rotateY(-90deg) translateZ(calc(var(--u)/2))}
.cubie button.k-U{transform:rotateX(90deg) translateZ(calc(var(--u)/2 + 1px))}
.cubie button.k-D{transform:rotateX(-90deg) translateZ(calc(var(--u)/2 + 1px))}
.cubie button.k-F{transform:translateZ(calc(var(--u)/2 + 1px))}
.cubie button.k-B{transform:rotateY(180deg) translateZ(calc(var(--u)/2 + 1px))}
.cubie button.k-R{transform:rotateY(90deg) translateZ(calc(var(--u)/2 + 1px))}
.cubie button.k-L{transform:rotateY(-90deg) translateZ(calc(var(--u)/2 + 1px))}
.cubie button.ctr{box-shadow:inset 0 0 0 calc(var(--u)*.03) rgba(0,0,0,.55)}
.views{display:grid;grid-template-columns:repeat(6,1fr);gap:5px;margin-top:6px}
.views button,.turns button{border:0;border-bottom:3px solid rgba(0,0,0,.3);border-radius:8px;background:rgba(255,255,255,.16);color:#fff;padding:5px 0;display:flex;flex-direction:column;align-items:center;line-height:1.1}
.views button b,.turns button b{font:700 19px var(--serif)}
.views button small,.turns button small{font-size:11px;font-weight:400}
.turns{display:grid;grid-template-columns:repeat(6,1fr);gap:5px;margin-top:6px}
.turns button{background:rgba(255,255,255,.22)}
.turns button.ac{background:rgba(255,212,59,.28)}
.tlabel{margin:10px 0 0;font-size:14px;color:var(--muted)}
.crow{display:flex;align-items:center;gap:10px;margin:6px 0;font-size:15px}
.crow input[type=color]{width:46px;height:34px;padding:0;border:2px solid rgba(255,255,255,.5);border-radius:8px;background:none;cursor:pointer}
.tp.busy .turns button,.tp.busy .actions .btn{opacity:.55}
.keyline{margin:8px 0 0;font-size:14px;color:var(--muted)}
@media (max-width:700px){
  #res:not([hidden]){position:fixed;left:0;right:0;bottom:0;z-index:30;margin:0!important;border-radius:14px 14px 0 0;background:#08240f;box-shadow:0 -6px 18px rgba(0,0,0,.5);padding:8px 10px 10px}
  #res h3{font-size:15px!important;margin:0 0 4px!important}
  #res .moves{flex-wrap:nowrap;overflow-x:auto;margin:4px 0}
  #res .moves span{flex:none;font-size:16px;padding:3px 8px}
  #res .actions{grid-template-columns:1fr 1fr 1fr;gap:6px;margin-top:4px!important}
  #res .actions .wide{grid-column:auto}
  #res .actions .btn{font-size:13px;padding:8px 4px}
  #res #explain{margin:4px 0 0!important;font-size:13px}
  #res details{display:none}
  body.has-res{padding-bottom:210px}
}

/* sudoku solver extras */
.tp .hintline{margin:0 0 8px;font-size:14px;color:var(--muted)}
.tp .pick{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:10px;font-size:15px}
.tp .pick select{font-size:17px;padding:8px 10px;border-radius:8px;border:0;background:#fff;color:#111}
.tp .pick .btn{width:auto;margin:0;flex:0 0 auto}
.seg{display:grid;grid-template-columns:1fr 1fr;gap:6px;max-width:520px;margin-top:10px}
.seg button{border:0;border-bottom:3px solid rgba(0,0,0,.3);border-radius:8px;background:rgba(255,255,255,.16);color:#fff;font-weight:700;font-size:15px;padding:10px 6px}
.seg button[aria-pressed="true"]{background:#fff;color:#111;outline:3px solid var(--gold)}
.sc2.guess{color:#6a2fb0;font-weight:400}
.sc2.hint{background:#fff0b3;box-shadow:inset 0 0 0 4px #e8a100;z-index:1}
.sc2.wrong{background:#ffb4b4;color:#7a0000}
.sc2 .pm{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);width:100%;height:100%;font:400 clamp(7px,2.1vw,12px)/1 var(--sans);color:#4a5a4d;place-items:center}

/* whole-cube guide pictures */
.cases{grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr))}
.case{display:block}
.case .pics{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:flex-start;margin-bottom:8px}
.case svg.iso{width:130px;height:auto;flex:none}
.case svg.net{width:min(100%,190px);height:auto;flex:none}
.case .small{font-size:14px;color:var(--muted)}
.case.wide{max-width:560px}
.guide .legendbox{max-width:560px;margin:10px 0}

.tlog{margin:6px 0 0;padding-left:22px;max-height:170px;overflow:auto;font-size:14px;line-height:1.45;background:rgba(0,0,0,.2);border-radius:8px;padding-top:6px;padding-bottom:6px;padding-right:8px}
.tlog li{margin:2px 0}
.tlog li.last{color:var(--gold);font-weight:700}

.tlog ul{margin:2px 0 4px;padding-left:18px;font-weight:400;font-size:13px}
.tlog li.last ul{color:#fff}

/* Rubik's Cube Challenge */
.tp .ptitle{font-family:var(--serif);font-size:30px;margin:6px 0 4px}
@media (max-width:820px){.tp .ptitle{font-size:25px}}
.chstats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:2px 0 8px}
.chstats div{background:rgba(0,0,0,.28);border-radius:10px;padding:8px 10px;text-align:center}
.chstats span{display:block;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.chstats b{font-family:var(--serif);font-size:20px;line-height:1.2;font-variant-numeric:tabular-nums}
.mbar{height:8px;background:rgba(0,0,0,.35);border-radius:6px;overflow:hidden;margin-bottom:6px}
.mbar i{display:block;height:100%;width:0;background:var(--go);transition:width .3s}
.mbar i.warn{background:var(--undo)}.mbar i.full{background:#e03131}
.turns .hf{background:rgba(120,180,255,.28)}
.turns button:disabled,.tp .actions .btn:disabled{opacity:.4;cursor:default}
.turns button.hint{outline:3px solid var(--gold);outline-offset:1px;background:rgba(255,212,59,.5);color:#fff}
.lvs .lv[aria-pressed="true"]{outline:3px solid var(--gold);outline-offset:2px}
.stars{font-size:38px;line-height:1;margin:2px 0 8px;color:#c9ced1;letter-spacing:4px}
.stars .on{color:#f5a300}
#mEnd .actions{display:grid;gap:8px}
#mEnd .btn{justify-content:center;width:100%}
#mEnd .btn.c-hint{color:#fff}
#rStars span{color:#c9ced1}#rStars .on{color:var(--gold)}
#mEnd .btn:not(.c-go):not(.c-hint){background:#e3e8e3;color:#161616}
/* Rubik's Cube Trainer */
.seqbox{background:rgba(0,0,0,.28);border-radius:10px;padding:10px 12px;margin-bottom:8px}
.seqt{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px}
.seq{display:flex;flex-wrap:wrap;gap:6px;min-height:40px}
.seq span{background:rgba(255,255,255,.16);border-radius:6px;padding:5px 9px;font-family:var(--serif);font-size:22px;font-weight:700;min-width:38px;text-align:center}
.seq span.now{background:var(--gold);color:#3a2c00}
.seq span.done{opacity:.4}
.seq span.bad{background:#e03131;color:#fff}
.seq .qm{background:var(--hint);color:#fff}
.tp .seg{display:grid;grid-template-columns:1fr;gap:6px}
.tp .seg button{border:0;border-bottom:3px solid rgba(0,0,0,.3);border-radius:8px;background:rgba(255,255,255,.16);color:#fff;padding:10px 12px;font-size:16px;font-weight:700;text-align:left}
.tp .seg button[aria-pressed="true"]{background:var(--go);color:#fff}
.chk{display:flex;gap:8px;align-items:center;margin-top:10px;font-size:15px}
.lvs .lv[data-fam]{background:#51606b}
/* Face letters on the middle squares: a plain bold sans letter with an underline, like the underline some people add to 6 and 9.
   The underline shows which way is down, so a U cannot be mistaken for a C seen from another angle. */
.cubie button.ctr{font-family:Arial,Helvetica,"Segoe UI",sans-serif;font-weight:700;text-decoration:underline;text-decoration-thickness:calc(var(--u)*.05);text-underline-offset:calc(var(--u)*.07)}
.lettersw{display:flex;align-items:center;gap:8px;margin:8px 0 2px;font-size:15px;color:var(--muted);cursor:pointer}
.lettersw input{width:20px;height:20px;accent-color:var(--gold)}
html.noletters .cubie button.ctr{font-size:0!important;text-decoration:none}
/* Sudoku solver: two clear steps */
.stephead{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:24px;margin:0 0 10px}
.stepno{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:var(--gold);color:#161616;font-family:var(--sans);font-weight:700;font-size:20px;flex:none}
.stephead.dim{opacity:.6}
.stephead.dim .stepno{background:#8a9a8c}
.need{background:rgba(0,0,0,.25);border-radius:10px;padding:10px 14px;margin:0 0 10px;max-width:520px;font-size:16px}
.need .mbar{margin-top:8px}
.need.ok b{color:var(--gold)}
.lockmsg{margin:0 0 10px;padding:10px 14px;border-radius:10px;background:rgba(255,212,59,.15);border:1px solid rgba(255,212,59,.55);font-size:15.5px;line-height:1.5}
#help.locked .btn,#help.locked select{opacity:.38;cursor:not-allowed}
#help.locked .panel{background:rgba(0,0,0,.14)}
.sstep .say{margin-bottom:14px}