html,body{margin:0;padding:0;min-height:100%;background:radial-gradient(120% 90% at 50% 0%,#141d42 0%,#0a0a18 70%);
  color:#e2e8f0;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;
  display:flex;flex-direction:column;align-items:center;touch-action:manipulation;
  -webkit-tap-highlight-color:transparent;user-select:none;-webkit-user-select:none;overflow-x:hidden}
#stage{width:min(96vw,520px);display:flex;flex-direction:column;align-items:center}
#topbar{display:flex;gap:6px;align-items:center;margin:8px 0 6px;width:100%}
.tab{font:inherit;font-size:.85rem;font-weight:800;min-height:44px;padding:6px 14px;border:1px solid #2b3564;
  background:rgba(20,26,53,.85);color:#94a3b8;border-radius:999px;cursor:pointer;transition:all .2s}
.tab.on{background:linear-gradient(135deg,#22d3ee,#a78bfa);border-color:transparent;color:#0b1020;
  box-shadow:0 0 14px rgba(34,211,238,.35)}
.tab:focus-visible,.key:focus-visible,.chip:focus-visible{outline:2px solid #22d3ee;outline-offset:2px}
#spacer{flex:1}
.chip{font:inherit;font-size:.85rem;font-weight:800;min-height:44px;padding:6px 12px;border-radius:999px;
  border:1px solid #2b3564;background:rgba(20,26,53,.85);color:#e2e8f0;display:flex;align-items:center}
button.chip{cursor:pointer}
#hardBtn.on{border-color:#ff2d95;color:#ff2d95;box-shadow:0 0 10px rgba(255,45,149,.4)}
/* 6x5 grid */
#board{display:grid;grid-template-rows:repeat(6,1fr);gap:6px;margin:2px 0}
.brow{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.tile{width:clamp(44px,17vw,62px);aspect-ratio:1;display:flex;align-items:center;justify-content:center;
  font-weight:900;font-size:clamp(1.2rem,5.4vw,1.9rem);text-transform:uppercase;border-radius:8px;
  border:1px solid #2b3564;background:rgba(20,26,53,.6);color:#e2e8f0;
  transition:transform .1s,border-color .15s}
.tile.pop{transform:scale(1.08)}
.tile.g{background:#0e9f6e;border-color:#0e9f6e;color:#fff;box-shadow:0 0 12px rgba(57,255,136,.35)}
.tile.y{background:#b8860b;border-color:#b8860b;color:#fff;box-shadow:0 0 12px rgba(255,213,74,.3)}
.tile.x{background:#1c2450;border-color:#1c2450;color:#7c8db5}
body:not(.nofx) .tile.flip{animation:tflip .5s ease-out;animation-delay:var(--fd,0s)}
@keyframes tflip{0%{transform:rotateX(0)}49%{transform:rotateX(90deg)}50%{transform:rotateX(90deg)}100%{transform:rotateX(0)}}
#board.shake{animation:gshake .4s ease-out}
@keyframes gshake{0%,100%{transform:none}25%{transform:translateX(-7px)}60%{transform:translateX(6px)}}
#msg{min-height:22px;margin:6px 0;font-size:.92rem;text-align:center;font-weight:700}
#msg.warn{color:#ff2d95}#msg.info{color:#7c8db5;font-weight:500}#msg.good{color:#39ff88}
/* keyboard */
#keys{display:flex;flex-direction:column;gap:7px;margin-bottom:10px;width:100%}
.krow{display:flex;gap:5px;justify-content:center}
.key{font:inherit;font-weight:800;min-width:clamp(28px,8.6vw,44px);height:50px;padding:0 4px;border-radius:7px;
  border:1px solid rgba(43,53,100,.9);background:rgba(38,48,96,.9);color:#e2e8f0;cursor:pointer;
  font-size:clamp(.85rem,3.6vw,1.05rem);text-transform:uppercase;transition:background .15s}
.key:active{transform:translateY(1px)}
.key.wide{min-width:clamp(48px,15vw,74px);font-size:clamp(.62rem,2.6vw,.78rem)}
.key.g{background:#0e9f6e;border-color:#0e9f6e;color:#fff}
.key.y{background:#b8860b;border-color:#b8860b;color:#fff}
.key.x{background:#141a3a;border-color:#141a3a;color:#5b688f}
/* end panel */
.overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;
  background:rgba(5,5,20,.88);backdrop-filter:blur(4px);z-index:20}
.overlay.hide{display:none}
.panel{background:rgba(20,26,53,.97);border:1px solid rgba(34,211,238,.4);border-radius:16px;
  padding:22px 26px;text-align:center;max-width:min(92vw,420px);max-height:92vh;overflow-y:auto;
  animation:panelin .4s cubic-bezier(.2,1.4,.4,1)}
@keyframes panelin{from{transform:translateY(30px) scale(.85);opacity:0}to{transform:none;opacity:1}}
.panel h2{margin:0 0 8px;font-size:1.3rem;background:linear-gradient(135deg,#22d3ee,#a78bfa);
  -webkit-background-clip:text;background-clip:text;color:transparent}
#epRows{font-size:1.1rem;line-height:1.55;margin-bottom:6px;letter-spacing:1px;white-space:pre}
.panel p{margin:0 0 10px;color:#94a3b8;font-size:.86rem}
#epCard{max-width:72%;max-height:36vh;object-fit:contain;border-radius:10px;margin-bottom:10px;display:none}
.panel button,.panel a{display:block;width:100%;font:inherit;font-weight:800;min-height:44px;margin-top:8px;
  border:0;border-radius:10px;background:linear-gradient(135deg,#22d3ee,#a78bfa);color:#0b1020;
  cursor:pointer;text-align:center;text-decoration:none;box-sizing:border-box;padding:10px 14px}
.panel button:last-child{background:rgba(20,26,53,.9);color:#e2e8f0;border:1px solid #2b3564}
/* confetti */
.cf{position:fixed;top:-4%;width:8px;height:12px;border-radius:2px;pointer-events:none;z-index:21;
  animation:cfall 1.1s ease-in forwards}
@keyframes cfall{0%{transform:translate(0,0) rotate(0);opacity:1}
  100%{transform:translate(var(--dx),58vh) rotate(540deg);opacity:0}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}
}