/* Shared shell for every game in Arcade: colour tokens, page frame, and the
   controls that look the same wherever they appear. Game-specific rules
   (tubes, grids, pieces) live in the page that needs them. */

:root{
  --ground:#151C24; --surface:#1E2831; --line:#2C3945;
  --ink:#E6EBEF; --muted:#6C7A87; --accent:#4FA88B; --sel:#E0A458;
  --radius:10px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  background:var(--ground); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:16px; line-height:1.4;
  padding:env(safe-area-inset-top) 12px calc(env(safe-area-inset-bottom) + 16px);
  max-width:560px; margin:0 auto; min-height:100vh;
  display:flex; flex-direction:column;
}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
button:focus-visible,a:focus-visible{outline:2px solid var(--sel);outline-offset:2px}
[hidden]{display:none!important}

header{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;padding:18px 2px 10px}
.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.score{font-size:22px;font-weight:200;letter-spacing:-.02em;font-variant-numeric:tabular-nums;margin-top:2px}
.score span{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-left:6px}

/* the back arrow every game page carries, top-left of the header */
.back{
  display:inline-flex;align-items:center;gap:6px;text-decoration:none;color:var(--muted);
  font-size:11px;letter-spacing:.14em;text-transform:uppercase;
}
.back:hover{color:var(--ink)}

.chiprow{display:flex;gap:6px;flex-wrap:wrap;padding:2px 0 12px;border-bottom:1px solid var(--line)}
.chip{
  font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);
  border:1px solid var(--line);border-radius:20px;padding:7px 13px;white-space:nowrap;
}
.chip[aria-pressed="true"]{color:var(--ground);background:var(--accent);border-color:var(--accent)}

.controls{display:flex;gap:8px;justify-content:center;padding-top:6px}
.ctrl{
  flex:1;max-width:150px;text-align:center;
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--surface);padding:13px 10px;font-size:14px;
}
.ctrl:disabled{color:var(--line)}

.win{
  margin-top:14px;padding:18px 16px;background:var(--surface);
  border-radius:var(--radius);text-align:center;
}
.win h2{margin:0 0 4px;font-size:18px;font-weight:500}
.win p{margin:0;color:var(--muted);font-size:14px}

.note{margin-top:12px;font-size:12px;color:var(--muted);text-align:center}

@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}