:root{--paper:#f6f3ec;--ink:#1d2433;--muted:#5b6475;--line:#d9d3c5;--card:#fffdf8;--accent:#c8862a;--blue:#2f6db5;
  --gold:#d9a521;--red:#c4453a;--ok:#2f7d4f;--warn:#b5651d;color-scheme:light}
*{box-sizing:border-box}
html,body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
h1,h2,h3{font-family:Georgia,"Times New Roman",serif;line-height:1.2;margin:.2em 0 .5em}
.wrap{max-width:640px;margin:0 auto;padding:12px 16px 80px}
.bar{position:sticky;top:0;z-index:5;background:var(--ink);color:#fff;padding:8px 16px;display:flex;justify-content:space-between;
  align-items:center;font-size:14px}
.bar b{font-weight:600}.dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:#7c8494;margin-right:6px}
.dot.on{background:#57c27a}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin:12px 0;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.say{font-size:18px}.muted{color:var(--muted)}.small{font-size:14px}
.btn{display:block;width:100%;min-height:52px;margin:8px 0;padding:12px 14px;font:600 18px/1.2 system-ui,sans-serif;border-radius:12px;
  border:2px solid var(--ink);background:#fff;color:var(--ink);cursor:pointer;text-align:left}
.btn.main{background:var(--ink);color:#fff;text-align:center}.btn.sel{background:var(--blue);border-color:var(--blue);color:#fff}
.btn:disabled{opacity:.5}
.grid{display:grid;gap:8px}.g4{grid-template-columns:repeat(4,1fr)}.g5{grid-template-columns:repeat(5,1fr)}
.num{min-height:56px;font:700 22px system-ui;border-radius:12px;border:2px solid var(--ink);background:#fff;color:var(--ink)}
.num.sel{background:var(--blue);color:#fff;border-color:var(--blue)}
.pic{margin:10px 0}.pic img{width:100%;border-radius:10px;background:#fff;border:1px solid var(--line)}
.pic figcaption{font-size:13px;color:var(--muted)}
.big{font:700 28px/1.2 Georgia,serif;margin:6px 0}.pose{font:700 24px/1.25 Georgia,serif;color:var(--blue)}
.coins{display:flex;gap:14px;justify-content:center;margin:10px 0}
.coinface{width:88px;height:88px;border-radius:50%;display:flex;align-items:center;justify-content:center;font:700 22px Georgia,serif;
  background:radial-gradient(circle at 35% 30%,#ffe9a8,#d9a521 70%);border:3px solid #9c7410;color:#4a3606}
.coinface.flip{animation:flip .6s ease-in-out}@keyframes flip{0%{transform:rotateY(0)}50%{transform:rotateY(90deg) scale(.9)}100%{transform:rotateY(0)}}
.mission{perspective:800px;margin:12px 0}
.mission .face{border-radius:16px;padding:22px;min-height:180px;display:flex;flex-direction:column;justify-content:center;text-align:center;
  border:3px solid var(--ink);background:#fff;cursor:pointer}
.mission .front{background:repeating-linear-gradient(45deg,#e9e3d4,#e9e3d4 10px,#f3eee2 10px,#f3eee2 20px)}
.tag{display:inline-block;padding:3px 10px;border-radius:999px;font-size:13px;font-weight:700}
.tag.back{background:#f4e2a8;color:#5a4300}.tag.lost{background:#f3c9c4;color:#7a1f16}
.ok{color:var(--ok);font-weight:700}
input.n{width:100%;font:700 26px system-ui;padding:10px;border-radius:12px;border:2px solid var(--ink);text-align:center}
ul.rules{padding-left:20px}ul.rules li{margin:6px 0}
.hl{background:#fff4d6;border-left:5px solid var(--accent);padding:10px 12px;border-radius:8px}

/* One readable current task and a truthful, persistent receipt on every participant screen. */
.activity-status{position:fixed;bottom:0;left:0;right:0;z-index:10;margin:0;padding:12px max(16px,env(safe-area-inset-left));
  padding-bottom:max(12px,env(safe-area-inset-bottom));background:var(--ink);color:white;font:600 15px/1.4 system-ui,sans-serif;
  border-top:3px solid var(--accent);text-align:center;box-shadow:0 -2px 10px #0002}
.activity-status.is-error{background:#76251e}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
button,input,summary,[role=button]{min-height:44px;touch-action:manipulation}
button:focus-visible,input:focus-visible,summary:focus-visible,[role=button]:focus-visible,a:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
.coins{flex-wrap:wrap}.coinface{flex-shrink:0}
.sequence-row{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:5px;margin:12px 0}
.sequence-cell{display:flex;align-items:center;justify-content:center;min-height:50px;font-size:14px;font-weight:700;border:1px solid var(--line);border-radius:8px;background:var(--paper)}
progress{width:100%;height:16px;accent-color:var(--blue)}
summary{cursor:pointer;padding:12px 0;font-weight:600}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;scroll-behavior:auto!important}}