:root {
  --bg: #05040f;
  --panel: #0c0a22;
  --line: #262058;
  --text: #e8e5ff;
  --muted: #9690c6;
  --cyan: #3ff4ff;
  --magenta: #ff4fd8;
  --yellow: #ffe14d;
  --violet: #6c5cff;
  --pixel: 'Press Start 2P', ui-monospace, monospace;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  color: var(--text);
  font-family: var(--mono);
  background: var(--bg);
}

body {
  min-height: 100svh;
  background:
    radial-gradient(1100px 520px at 50% -12%, #1d1157 0%, transparent 62%),
    radial-gradient(700px 480px at 100% 100%, #08303f 0%, transparent 60%),
    var(--bg);
}

.top {
  position: relative;
  text-align: center;
  padding: 18px 16px 4px;
}
.back {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 12px;
  text-decoration: none;
}
.back:hover { color: var(--cyan); }

.logo {
  margin: 0;
  font-family: var(--pixel);
  font-size: clamp(20px, 4.4vw, 34px);
  letter-spacing: 2px;
  color: var(--yellow);
  text-shadow: 0 0 14px rgba(255, 225, 77, .55);
}
.logo .bra, .logo .ket {
  color: var(--cyan);
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.25em;
  text-shadow: 0 0 14px rgba(63, 244, 255, .7);
}
.sub {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.app {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 24px;
  padding: 12px 16px 24px;
  flex-wrap: wrap;
}

.stage-col {
  width: min(520px, calc(100vw - 32px), calc(100svh - 250px));
  min-width: 280px;
}

.hud {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 8px;
  padding: 4px 2px 8px;
  font-family: var(--pixel);
}
.hud-bottom { padding: 8px 2px 4px; align-items: center; }
.hud > div { display: flex; flex-direction: column; gap: 6px; }
.lbl { font-size: 9px; color: var(--muted); letter-spacing: 1px; }
.val { font-size: 14px; color: var(--text); min-height: 14px; }
.icons { color: var(--yellow); letter-spacing: 3px; }
#tunnels { color: var(--cyan); }
.icons.mag { color: var(--magenta); }

.chip {
  white-space: nowrap;
  font-family: var(--pixel);
  font-size: 9px;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 9px;
  cursor: pointer;
}
.chip:hover { color: var(--text); border-color: var(--violet); }

.stage {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 0 0 1px var(--line), 0 20px 60px rgba(40, 20, 140, .35);
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}
#game {
  display: block;
  width: 100%;
  height: 100%;
  background: #04030c;
}

.overlay {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(4, 3, 14, .78);
  backdrop-filter: blur(3px);
}
.overlay.show { display: flex; }

.card {
  max-width: 420px;
  width: 100%;
  text-align: center;
  background: rgba(12, 10, 34, .92);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 18px;
  box-shadow: 0 0 40px rgba(108, 92, 255, .25);
}
.card-logo {
  font-family: var(--pixel);
  color: var(--yellow);
  font-size: clamp(14px, 4vw, 20px);
  margin-bottom: 10px;
  text-shadow: 0 0 12px rgba(255, 225, 77, .5);
}
.card-logo b { color: var(--cyan); font-family: var(--mono); }
.card p { color: var(--muted); font-size: 12.5px; line-height: 1.5; margin: 8px 0; }
.card .big {
  font-family: var(--pixel);
  font-size: 16px;
  color: var(--text);
}
.mini {
  list-style: none;
  padding: 0;
  margin: 12px 0;
  text-align: left;
  font-size: 12px;
  line-height: 1.45;
  display: grid;
  gap: 7px;
}
.mini li { display: flex; gap: 10px; align-items: center; }
.go {
  margin-top: 8px;
  font-family: var(--pixel);
  font-size: 11px;
  color: #05040f;
  background: var(--yellow);
  border: 0;
  border-radius: 8px;
  padding: 12px 16px;
  cursor: pointer;
  box-shadow: 0 0 22px rgba(255, 225, 77, .45);
  animation: pulse 1.4s ease-in-out infinite;
}
@keyframes pulse { 50% { box-shadow: 0 0 6px rgba(255, 225, 77, .2); } }
.hint { font-size: 11px !important; }

.gate, .sym {
  flex: none;
  display: inline-grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 5px;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 13px;
}
.gate.h { color: #04030c; background: var(--cyan); box-shadow: 0 0 10px rgba(63, 244, 255, .6); }
.gate.z { color: #04030c; background: var(--magenta); box-shadow: 0 0 10px rgba(255, 79, 216, .6); }
.sym { color: var(--text); border: 1px solid var(--line); font-size: 12px; }
.sym.wave { color: #ffb0d8; }
.sym.sup { color: var(--cyan); }

.panel {
  width: min(360px, calc(100vw - 32px));
  background: rgba(12, 10, 34, .7);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 6px 16px 14px;
  font-size: 12.5px;
  line-height: 1.45;
}
.panel h2 {
  font-family: var(--pixel);
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--cyan);
  margin: 16px 0 10px;
}
.ket-box {
  background: #07061a;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
}
.ket-text { font-size: 16px; font-weight: 700; color: var(--yellow); min-height: 22px; }
.coh { height: 6px; margin: 8px 0 6px; border-radius: 3px; background: #17143a; overflow: hidden; }
#coh { height: 100%; width: 0; background: linear-gradient(90deg, var(--cyan), var(--magenta)); transition: width .1s linear; }
.probs { color: var(--muted); font-size: 11.5px; }

.ghosts { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.ghosts li { display: grid; grid-template-columns: 12px 56px 1fr; gap: 8px; align-items: center; }
.swatch { width: 12px; height: 12px; border-radius: 6px 6px 2px 2px; }
.gname { color: var(--text); font-weight: 700; }
.gstate { color: var(--muted); font-size: 11.5px; }
.gstate b { color: var(--text); }

.legend, .keys { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.legend li { display: flex; gap: 10px; align-items: flex-start; color: var(--muted); }
.legend b { color: var(--text); }
code { color: #cfc8ff; font-family: var(--mono); font-size: .95em; white-space: nowrap; }
.keys { color: var(--muted); gap: 6px; }
kbd {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text);
  background: #17143a;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 1px 5px;
}

.touch { display: none; grid-template-columns: repeat(5, 1fr); gap: 6px; margin-top: 8px; }
.touch button {
  flex: 1;
  font-family: var(--pixel);
  font-size: 10px;
  color: var(--text);
  background: #120f33;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 6px;
}
.touch button:active { background: #241e5c; }
.touch button.q { color: var(--magenta); }
@media (pointer: coarse) {
  .touch { display: grid; }
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 11px;
  padding: 0 16px 24px;
}

.overlay { overflow-y: auto; align-items: safe center; }
@media (max-width: 480px) {
  .card { padding: 12px 12px; }
  .card-logo { display: none; }
  .card p { font-size: 11.5px; margin: 4px 0; }
  .mini { font-size: 11px; gap: 4px; margin: 8px 0; }
  .mini .gate, .mini .sym { width: 20px; height: 20px; font-size: 11px; }
  .go { padding: 10px 14px; }
}

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding-bottom: 8px;
}
.seg, .hud > .seg { display: flex; flex-direction: row; gap: 4px; flex-wrap: wrap; }
.seg button {
  font-family: var(--pixel);
  font-size: 9px;
  color: var(--muted);
  background: #0c0a24;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 10px;
  cursor: pointer;
}
.seg button:hover { color: var(--text); border-color: var(--violet); }
.seg button.on { color: #05040f; background: var(--cyan); border-color: var(--cyan); box-shadow: 0 0 12px rgba(63, 244, 255, .45); }
#modes button[data-mode="measure"].on { background: var(--magenta); border-color: var(--magenta); box-shadow: 0 0 12px rgba(255, 79, 216, .45); }
#modes button[data-mode="flag"].on { background: var(--yellow); border-color: var(--yellow); box-shadow: 0 0 12px rgba(255, 225, 77, .45); }
.status {
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 12.5px;
  color: var(--muted);
  padding: 0 4px 8px;
}
.status.win { color: var(--cyan); }
.status.lose { color: #ff6b8b; }
#measures { color: var(--magenta); }
.sym.num { color: var(--cyan); font-family: var(--mono); }
.stage { cursor: pointer; }

.p0 { color: var(--cyan); }
.p1 { color: #ffb347; }
.hud .turn { align-items: center; }
.hud .right { align-items: flex-end; }
.moves {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding-top: 10px;
}
.moves .chip { margin-left: auto; }
#modes button[data-mode="split"].on { background: var(--cyan); border-color: var(--cyan); }
#modes button[data-mode="entangle"].on { background: #ffb0d8; border-color: #ffb0d8; box-shadow: 0 0 12px rgba(255, 176, 216, .45); }
.zbtn {
  font-family: var(--pixel);
  font-size: 9px;
  color: var(--magenta);
  background: #0c0a24;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 10px;
  cursor: pointer;
}
.zbtn.on { color: #05040f; background: var(--magenta); border-color: var(--magenta); box-shadow: 0 0 12px rgba(255, 79, 216, .45); }
.seg button:disabled, .zbtn:disabled { opacity: .35; cursor: not-allowed; }

.hcount { color: var(--cyan); }
.gate.x { color: #05040f; background: var(--yellow); box-shadow: 0 0 10px rgba(255, 225, 77, .6); }
#tools button[data-tool="X"].on { background: var(--yellow); border-color: var(--yellow); box-shadow: 0 0 12px rgba(255, 225, 77, .45); }
#tools button[data-tool="Z"].on { background: var(--magenta); border-color: var(--magenta); box-shadow: 0 0 12px rgba(255, 79, 216, .45); }
.dial {
  flex: none;
  position: relative;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1.5px solid #3a3470;
  background: #0c0a26;
}
.dial::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 9px;
  height: 2.5px;
  border-radius: 2px;
  transform-origin: 0 50%;
  background: currentColor;
}
.dial.d0 { color: #e8e5ff; } .dial.d0::after { transform: translateY(-50%) rotate(-90deg); }
.dial.d1 { color: var(--yellow); background: #2a2208; } .dial.d1::after { transform: translateY(-50%) rotate(90deg); }
.dial.dp { color: var(--cyan); } .dial.dp::after { transform: translateY(-50%); }
.dial.dm { color: var(--magenta); } .dial.dm::after { transform: translateY(-50%) rotate(180deg); }
.dials li { align-items: center; }
.note { color: var(--muted); font-size: 12px; margin: 10px 0 0; }
.levels {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin: 14px 0 6px;
}
.levels button {
  font-family: var(--pixel);
  font-size: 11px;
  color: var(--text);
  background: #120f33;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 4px 8px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.levels button:hover { border-color: var(--violet); }
.levels button.cur { border-color: var(--cyan); box-shadow: 0 0 10px rgba(63, 244, 255, .35); }
.levels .stars { font-family: var(--mono); font-size: 11px; color: var(--yellow); letter-spacing: 1px; min-height: 13px; }
.levels .locked { opacity: .35; cursor: not-allowed; }
.card .row { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.card .ghostbtn {
  font-family: var(--pixel);
  font-size: 10px;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  cursor: pointer;
  margin-top: 8px;
}
.bigstars { font-size: 26px; color: var(--yellow); letter-spacing: 6px; margin: 6px 0; text-shadow: 0 0 12px rgba(255, 225, 77, .5); }

.tilev { color: var(--yellow); }
.mag { color: var(--magenta); }
.stage { touch-action: none; }
.hintline { text-align: center; color: var(--muted); font-size: 11.5px; margin: 10px 0 0; }
.card .row { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }