:root{
  --bg:#070c16;
  --panel:#0d1524;
  --panel-2:#101a2c;
  --ink:#e8f2f6;
  --dim:#8fa3b4;
  --accent:#5fe3b0;
  --accent-2:#6fd8ff;
  --gold:#ffd166;
  --line:rgba(255,255,255,.09);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

*{box-sizing:border-box}

html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:var(--sans)}
body{
  min-height:100vh;
  background:
    radial-gradient(1100px 700px at 50% -10%, #16233a 0%, rgba(22,35,58,0) 60%),
    radial-gradient(700px 500px at 90% 110%, #10233a 0%, rgba(16,35,58,0) 65%),
    var(--bg);
}

.wrap{
  max-width:760px;
  margin:0 auto;
  padding:22px 20px 40px;
  display:flex;
  flex-direction:column;
  gap:14px;
}

/* ---------- header ---------- */
.top{
  display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
h1{
  margin:0;font-family:var(--mono);font-size:26px;letter-spacing:.16em;font-weight:700;
  color:var(--accent);
}
h1 span{color:var(--ink);opacity:.85;margin-left:.5em;font-weight:400}
.tagline{margin:4px 0 0;font-size:12px;color:var(--dim);letter-spacing:.04em}

.stats{display:flex;gap:8px;flex-wrap:wrap}
.stat{
  min-width:88px;padding:8px 12px;border:1px solid var(--line);border-radius:10px;
  background:linear-gradient(180deg,var(--panel-2),var(--panel));
  display:flex;flex-direction:column;align-items:center;gap:2px;
}
.stat b{font-family:var(--mono);font-size:22px;line-height:1;color:var(--ink)}
.stat span{font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim)}
.stat.gold b{color:var(--gold)}
.stat b.pop{animation:pop .32s cubic-bezier(.2,1.6,.4,1)}
@keyframes pop{0%{transform:scale(1)}35%{transform:scale(1.35);color:var(--accent)}100%{transform:scale(1)}}

/* ---------- board ---------- */
.board{
  position:relative;
  border-radius:14px;
  padding:10px;
  background:linear-gradient(180deg,#0c1626,#081020);
  border:1px solid var(--line);
  box-shadow:0 24px 60px rgba(0,0,0,.55), inset 0 0 0 1px rgba(95,227,176,.06);
}
#game{
  display:block;
  width:min(720px,100%);
  aspect-ratio:1/1;
  border-radius:8px;
  background:#0a111f;
}
.board.slipping{box-shadow:0 24px 60px rgba(0,0,0,.55), 0 0 0 1px rgba(111,216,255,.55), 0 0 34px rgba(111,216,255,.22)}
.board.dead{box-shadow:0 24px 60px rgba(0,0,0,.55), 0 0 0 1px rgba(255,95,95,.55), 0 0 34px rgba(255,95,95,.2)}

.overlay{
  position:absolute;inset:10px;border-radius:8px;pointer-events:none;
  display:flex;align-items:center;justify-content:center;text-align:center;
  background:rgba(6,11,20,.72);
  backdrop-filter:blur(2px);
  opacity:0;transition:opacity .18s ease;
}
.overlay.show{opacity:1}
.overlay-inner{max-width:520px;padding:24px}
.overlay h2{
  margin:0 0 8px;font-family:var(--mono);font-size:28px;letter-spacing:.18em;color:var(--accent);
}
.overlay.over h2{color:#ff7b72}
.overlay.paused h2{color:var(--accent-2)}
.overlay p{margin:0;font-size:14px;line-height:1.65;color:#cfe0e8}
.overlay .big{font-family:var(--mono);font-size:34px;color:var(--ink);margin:6px 0 2px}
.overlay .big em{font-style:normal;color:var(--gold)}
.overlay p b{color:var(--ink)}
.overlay .hint{display:inline-block;margin-top:10px;font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--accent)}

/* ---------- slip meter ---------- */
.meter-row{
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  padding:10px 14px;border:1px solid var(--line);border-radius:12px;
  background:linear-gradient(180deg,var(--panel-2),var(--panel));
}
.meter{display:flex;align-items:center;gap:12px}
.meter-label{font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim)}
.pips{display:flex;align-items:center;gap:7px}
.pip{
  width:16px;height:16px;border-radius:4px;transform:rotate(45deg);
  border:1px solid rgba(111,216,255,.35);background:rgba(111,216,255,.08);
}
.pip.on{background:linear-gradient(135deg,#9ef0ff,#3fb9e8);border-color:#9ef0ff;box-shadow:0 0 12px rgba(111,216,255,.55)}
.prog{display:flex;gap:4px;margin-left:8px}
.prog i{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.14)}
.prog i.on{background:var(--accent);box-shadow:0 0 8px rgba(95,227,176,.6)}
.pip.more{width:auto;transform:none;font-family:var(--mono);font-size:13px;color:var(--accent-2);border:0;background:none}
.pips.deny{animation:deny .32s ease}
@keyframes deny{0%,100%{transform:translateX(0)}25%{transform:translateX(-6px)}50%{transform:translateX(5px)}75%{transform:translateX(-2px)}}
.meter-note{margin:0;font-size:12.5px;color:var(--dim);min-height:1.2em}
.meter-note.ready{color:var(--accent-2)}

/* ---------- twist card ---------- */
.twist{
  padding:14px 16px;border-radius:12px;
  border:1px solid rgba(111,216,255,.28);
  background:linear-gradient(180deg,rgba(111,216,255,.10),rgba(111,216,255,.02));
}
.twist h2{margin:0 0 6px;font-family:var(--mono);font-size:13px;letter-spacing:.2em;color:var(--accent-2)}
.twist h2 em{font-style:normal;color:var(--ink)}
.twist p{margin:0;font-size:14.5px;line-height:1.6;color:#d7e6ee}
.twist .sub{margin-top:6px;font-size:12.5px;color:var(--dim)}
.twist b{color:var(--ink)}

/* ---------- controls ---------- */
.controls{
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  padding:10px 14px;border:1px solid var(--line);border-radius:12px;
  background:linear-gradient(180deg,var(--panel-2),var(--panel));
}
.keys{display:flex;gap:16px;flex-wrap:wrap;font-size:12.5px;color:var(--dim)}
kbd{
  font-family:var(--mono);font-size:11px;padding:3px 6px;border-radius:5px;
  background:#16233a;border:1px solid rgba(255,255,255,.16);border-bottom-width:2px;color:#e6f1f6;
}
#soundBtn{
  font-family:var(--mono);font-size:11px;padding:3px 9px;border-radius:6px;cursor:pointer;
  background:#16233a;border:1px solid rgba(255,255,255,.18);color:#e6f1f6;
}
#soundBtn[aria-pressed="false"]{opacity:.55}
.fine{margin:0;font-size:11.5px;color:#6d8092}

@media (max-width:560px){
  .stat{min-width:70px}
  h1{font-size:20px}
}