/* Reaction & memory arcade — shared shell for the /tools/*-memory|trainer|test
 * games. Same magazine system as reaction.css / colorch.css: paper surfaces,
 * forest accent, mono data labels, sharp corners. */
.ac-tool{margin-top:26px}
.ac-hero{border-top:2px solid var(--ink);border-bottom:1px solid var(--line);padding:26px 0 22px}
.ac-hero .eyebrow{font:10px var(--type-data);letter-spacing:.18em;text-transform:uppercase;color:var(--site-accent);margin:0 0 10px}
.ac-hero h1{font-size:clamp(28px,4.6vw,44px);line-height:1.15;margin:0 0 12px;font-weight:800}
.ac-hero p{max-width:var(--measure);font-size:14px;line-height:1.9;color:var(--muted);margin:0}

.ac-stage{position:relative;margin-top:22px}

/* buttons — same family as .rt-btn */
.ac-btn,.ac-btn-ghost{border:1px solid var(--site-accent);padding:12px 22px;font:inherit;font-size:13px;font-weight:700;cursor:pointer;min-height:44px;border-radius:0}
.ac-btn{background:var(--site-accent);color:var(--accent-ink)}
.ac-btn-ghost{background:var(--surface);color:var(--site-accent)}
.ac-btn:hover{filter:brightness(1.06)}
.ac-btn-ghost:hover{background:var(--site-accent);color:var(--accent-ink)}
.ac-btn:focus-visible,.ac-btn-ghost:focus-visible{outline:2px solid var(--site-accent);outline-offset:2px}
.ac-btn:disabled,.ac-btn-ghost:disabled{opacity:.45;cursor:not-allowed}
.ac-btn:active,.ac-btn-ghost:active{transform:translateY(1px)}

/* panels: intro / result / cover all share this card */
.ac-panel{background:var(--surface);border:1px solid var(--line);border-top:3px solid var(--site-accent);padding:26px 30px}
.ac-panel[hidden]{display:none}
.ac-panel h2{margin:0 0 10px;font-size:clamp(20px,3.4vw,30px);font-weight:800;line-height:1.3}
.ac-panel p{margin:0;font-size:13px;line-height:1.8;color:var(--muted)}

.ac-intro{display:flex;flex-direction:column;gap:20px}
.ac-intro-eyebrow{font:10px var(--type-data);letter-spacing:.18em;text-transform:uppercase;color:var(--site-accent);margin:0}
.ac-steps{list-style:none;margin:0;padding:0;display:grid;gap:12px;max-width:var(--measure)}
.ac-steps li{display:flex;align-items:baseline;gap:14px;font-size:13.5px;line-height:1.7;color:var(--muted)}
.ac-steps b{font:800 26px/1 var(--type-data);color:var(--site-accent);font-variant-numeric:tabular-nums;flex:none;min-width:.9em}
.ac-intro-foot{display:flex;align-items:center;flex-wrap:wrap;gap:14px}
.ac-best{font:10px var(--type-data);color:#235747;border:1px solid #ccd3bd;background:#e8ecdf;padding:6px 10px}
.ac-best[hidden]{display:none}
.ac-note{font:10px var(--type-data);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0}

/* HUD row during play */
.ac-play{display:flex;flex-direction:column;gap:14px}
.ac-play[hidden]{display:none}
.ac-hud{display:flex;align-items:center;gap:14px 26px;flex-wrap:wrap;border:1px solid var(--line);border-top:2px solid var(--site-accent);background:var(--surface);padding:12px 16px}
.ac-hud-cells{display:contents}
.ac-hud-cell{min-width:0}
.ac-hud-label{display:block;font:9px var(--type-data);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:2px}
.ac-hud-value{display:block;font:800 24px/1.1 var(--type-data);font-variant-numeric:tabular-nums}
.ac-hud-cell.is-alert .ac-hud-value{color:var(--rank-coral,#e05737)}
.ac-hud [data-ac-pause]{margin-left:auto;padding:8px 16px;min-height:40px;font-size:12px}
.ac-status{min-height:1.4em;font-size:12px;color:var(--site-accent);margin:0;text-align:center}

/* game surface */
.ac-surface{position:relative}
.ac-surface[hidden]{display:none}

/* cover overlay shown while paused / tab hidden */
.ac-cover{position:absolute;inset:0;z-index:5;display:flex;flex-direction:column;justify-content:center;gap:14px}
.ac-cover .ac-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}

/* result panel */
.ac-result{display:flex;flex-direction:column;gap:18px}
.ac-result-head{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.ac-result-head h2{margin:0}
.ac-newbest{display:inline-block;width:fit-content;font:700 11px var(--type-data);letter-spacing:.08em;color:var(--accent-ink);background:var(--rank-coral,#e05737);padding:4px 10px}
.ac-newbest[hidden]{display:none}
.ac-result-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:24px;align-items:start}
.ac-card-preview{width:100%;height:auto;border:1px solid var(--line);display:block;grid-column:2;grid-row:1/span 2}
.ac-final{display:flex;align-items:baseline;gap:18px;flex-wrap:wrap}
.ac-final-score{font:800 clamp(48px,9vw,84px)/1 var(--type-data);font-variant-numeric:tabular-nums}
.ac-final-meta{display:grid;gap:2px;font-size:13px;color:var(--muted)}
.ac-final-meta strong{color:var(--ink);font-variant-numeric:tabular-nums}
.ac-cells{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:12px}
.ac-cell{border:1px solid #b9c2ae;background:var(--surface);padding:14px;display:flex;flex-direction:column;gap:4px}
.ac-cell b{font:700 24px var(--type-data);color:var(--ink);font-variant-numeric:tabular-nums}
.ac-cell span{font:9px var(--type-data);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.ac-verdict{margin:0;font-size:13.5px;line-height:1.8;color:var(--ink)}
.ac-result-ops{display:flex;flex-direction:column;gap:12px}
.ac-result-actions{display:flex;flex-wrap:wrap;gap:10px}
.ac-share-kicker{font:700 10px var(--type-data);letter-spacing:.14em;text-transform:uppercase;color:var(--site-accent);margin:6px 0 0}
.ac-share-body{width:100%;box-sizing:border-box;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:12px/1.6 var(--type-data);padding:10px 12px;resize:none;overflow:hidden;margin:0}
.ac-share-msg{font-size:12px;color:var(--site-accent);min-height:1.4em;margin:0}
.ac-clear-link{border-color:transparent!important;background:transparent!important;color:var(--site-accent)!important;text-decoration:underline;padding-left:0!important;padding-right:0!important}

/* ---- game surfaces ----------------------------------------------------- */

/* aim trainer */
.ac-aim-arena{position:relative;border:1px solid var(--line);background:var(--surface);height:clamp(320px,52vh,480px);cursor:crosshair;overflow:hidden;touch-action:manipulation;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent}
.ac-aim-arena[data-state="miss"]{background:#f7e8e3}
.ac-aim-target{position:absolute;border-radius:50%;border:3px solid #fff;background:var(--rank-coral,#e05737);box-shadow:0 0 0 1px var(--rank-coral,#e05737),0 4px 14px rgba(0,0,0,.18);padding:0;cursor:pointer;touch-action:manipulation}
.ac-aim-target:focus-visible{outline:3px solid var(--site-accent);outline-offset:3px}
.ac-aim-hint{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font:600 15px var(--type-data);color:var(--muted);pointer-events:none;text-align:center;padding:0 20px}

/* sequence memory */
.ac-seq-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;width:min(100%,420px);margin:0 auto;aspect-ratio:1/1}
.ac-seq-cell{appearance:none;border:1px solid color-mix(in srgb,var(--ink) 10%,transparent);border-radius:0;background:color-mix(in srgb,var(--site-accent) 16%,var(--surface));padding:0;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;min-width:0;min-height:0}
.ac-seq-cell:focus-visible{outline:3px solid var(--site-accent);outline-offset:2px}
.ac-seq-cell.is-lit{background:var(--site-accent)}
.ac-seq-cell.is-ok{background:#4e8a62}
.ac-seq-cell.is-bad{background:var(--rank-coral,#e05737)}
.ac-seq-cell:disabled{cursor:default}
.ac-seq-grid.is-frozen .ac-seq-cell{pointer-events:none}

/* number memory */
.ac-num-wrap{display:flex;flex-direction:column;align-items:center;gap:18px;border:1px solid var(--line);background:var(--surface);padding:clamp(28px,6vw,56px) 20px;text-align:center}
.ac-num-digits{font:800 clamp(30px,7vw,64px)/1.1 var(--type-data);font-variant-numeric:tabular-nums;letter-spacing:.06em;word-break:break-all;color:var(--ink)}
.ac-num-bar{width:min(100%,420px);height:6px;background:var(--line);position:relative;overflow:hidden}
.ac-num-bar i{position:absolute;inset:0;background:var(--site-accent);transform-origin:left;display:block}
.ac-num-form{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;width:min(100%,460px)}
.ac-num-input{flex:1 1 200px;border:1px solid var(--line);background:var(--surface);padding:12px 14px;font:700 20px var(--type-data);letter-spacing:.08em;text-align:center;color:var(--ink)}
.ac-num-input:focus-visible{outline:2px solid var(--site-accent);outline-offset:2px}

/* visual memory */
.ac-vis-wrap{width:min(100%,560px);margin:0 auto}
.ac-vis-grid{display:grid;grid-template-columns:repeat(var(--ac-n,3),minmax(0,1fr));gap:8px;aspect-ratio:1/1}
.ac-vis-tile{appearance:none;border:1px solid color-mix(in srgb,var(--ink) 10%,transparent);border-radius:0;background:color-mix(in srgb,var(--site-accent) 14%,var(--surface));padding:0;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;min-width:0;min-height:44px}
.ac-vis-tile:focus-visible{outline:3px solid var(--site-accent);outline-offset:2px}
.ac-vis-tile.is-lit{background:var(--site-accent)}
.ac-vis-tile.is-found{background:var(--site-accent);cursor:default}
.ac-vis-tile.is-wrong{background:var(--rank-coral,#e05737);cursor:default}
.ac-vis-grid.is-frozen .ac-vis-tile{pointer-events:none}

/* chimp test */
.ac-chimp-arena{position:relative;border:1px solid var(--line);background:var(--surface);height:clamp(340px,58vh,520px);touch-action:manipulation;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent}
.ac-chimp-cell{position:absolute;transform:translate(-50%,-50%);appearance:none;width:56px;height:56px;max-width:13vw;max-height:13vw;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:800 22px var(--type-data);font-variant-numeric:tabular-nums;cursor:pointer;padding:0;touch-action:manipulation}
.ac-chimp-cell:focus-visible{outline:3px solid var(--site-accent);outline-offset:2px}
.ac-chimp-cell.is-hidden{color:transparent;background:color-mix(in srgb,var(--site-accent) 12%,var(--surface))}
.ac-chimp-cell.is-hit{background:var(--site-accent);color:var(--accent-ink);cursor:default}
.ac-chimp-cell.is-bad{background:var(--rank-coral,#e05737);color:#fff}

/* verbal memory */
.ac-verb-wrap{display:flex;flex-direction:column;align-items:center;gap:20px;border:1px solid var(--line);background:var(--surface);padding:clamp(28px,6vw,52px) 20px;text-align:center}
.ac-verb-word{font:800 clamp(30px,6.4vw,54px)/1.2 var(--type-data);color:var(--ink);word-break:break-word}
.ac-verb-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}
.ac-verb-actions .ac-btn{min-width:140px}
.ac-verb-keys{font:10px var(--type-data);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.ac-verb-lives{font:800 20px var(--type-data);color:var(--rank-coral,#e05737);letter-spacing:.2em}

/* typing test */
.ac-type-wrap{display:flex;flex-direction:column;gap:14px}
.ac-type-modes{display:flex;align-items:center;flex-wrap:wrap;gap:10px 18px;border:1px solid var(--line);border-top:2px solid var(--site-accent);background:var(--surface);padding:10px 14px}
.ac-modes-group{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.ac-chip{appearance:none;border:1px solid var(--line);background:var(--surface);color:var(--muted);font:700 11px var(--type-data);letter-spacing:.06em;padding:8px 12px;min-height:36px;cursor:pointer;border-radius:0}
.ac-chip:hover{border-color:var(--site-accent);color:var(--site-accent)}
.ac-chip.is-on{background:var(--site-accent);border-color:var(--site-accent);color:var(--accent-ink)}
.ac-chip:focus-visible{outline:2px solid var(--site-accent);outline-offset:2px}
.ac-mode-best{margin-left:auto}
.ac-type-words{position:relative;height:7.6em;overflow:hidden;border:1px solid var(--line);border-top:3px solid var(--site-accent);background:var(--surface);padding:.9em 1em;font:400 clamp(17px,2.8vw,23px)/1.9 var(--type-data);color:var(--muted);user-select:none;cursor:text}
.ac-type-words .ac-w{display:inline-block;margin:0 0 .12em 0;white-space:nowrap;border-bottom:2px solid transparent}
.ac-type-words.is-spaced .ac-w{margin-right:.05em}
.ac-type-words .ac-w i,.ac-type-words i.ac-sp{font-style:normal;white-space:pre-wrap}
.ac-type-words i.ac-sp.is-bad{border-radius:0}
.ac-type-words .ac-w.is-cur{border-bottom-color:color-mix(in srgb,var(--site-accent) 55%,transparent)}
.ac-type-words i.is-ok{color:var(--ink)}
.ac-type-words i.is-bad{color:#fff;background:var(--rank-coral,#e05737)}
.ac-type-words i.is-cur{border-left:2px solid var(--site-accent)}
.ac-type-input{width:100%;box-sizing:border-box;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:400 16px/1.6 var(--type-data);padding:10px 14px;resize:vertical;min-height:52px}
.ac-type-input:focus-visible{outline:2px solid var(--site-accent);outline-offset:2px}
.ac-type-hint{font:10px var(--type-data);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0}

/* ---- SEO / copy sections — same rhythm as reaction.css ----------------- */
.ac-seo{margin-top:40px;max-width:var(--measure)}
.ac-seo section{margin-bottom:34px}
.ac-seo h2{font-size:19px;font-weight:800;margin:0 0 12px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.ac-seo p,.ac-seo li{font-size:14px;line-height:1.9;color:var(--muted)}
.ac-seo p{margin:0 0 10px}
.ac-seo ul{padding-left:20px;margin:0}
.ac-seo li{margin-bottom:6px}
.ac-faq details{border:1px solid var(--line);background:var(--surface);margin-bottom:8px}
.ac-faq summary{padding:13px 16px;font-size:13.5px;font-weight:700;cursor:pointer;color:var(--ink)}
.ac-faq details p{padding:0 16px 14px;margin:0;font-size:13px}
.ac-links{display:flex;flex-wrap:wrap;gap:10px}
.ac-links a{border:1px solid var(--line);padding:9px 14px;font-size:12.5px;font-weight:700;color:var(--site-accent);text-decoration:none}
.ac-links a:hover{border-color:var(--site-accent)}

@media(max-width:760px){
  .ac-result-grid{grid-template-columns:1fr}
  .ac-card-preview{grid-column:auto;grid-row:auto}
}
@media(max-width:640px){
  .ac-panel{padding:20px 18px}
  .ac-cells{grid-template-columns:1fr 1fr}
  .ac-hud{gap:10px 18px;padding:10px 12px}
  .ac-hud-value{font-size:19px}
  .ac-aim-arena{height:clamp(300px,58vh,420px)}
  .ac-chimp-arena{height:clamp(320px,60vh,460px)}
}

@media(prefers-reduced-motion:reduce){
  .ac-aim-arena,.ac-seq-cell,.ac-vis-tile,.ac-chimp-cell,.ac-btn,.ac-btn-ghost{transition:none!important}
}
@media(prefers-reduced-motion:no-preference){
  .ac-aim-arena{transition:background-color .15s ease}
  .ac-seq-cell,.ac-vis-tile{transition:background-color .12s ease}
  .ac-chimp-cell{transition:background-color .12s ease,color .12s ease}
}