:root {
  --bg: #0f1020;
  --panel: #1a1c2c;
  --panel-2: #262b44;
  --frame: #333c57;
  --ink: #f4f4f4;
  --muted: #94b0c2;
  --dim: #566c86;
  --green: #38b764;
  --lime: #a7f070;
  --teal: #257179;
  --yellow: #ffcd75;
  --orange: #ef7d57;
  --red: #b13e53;
  --red-ink: #ff5d6c;
  --blue: #41a6f6;
  --p: 4px; /* one "pixel" of the UI chrome */
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
}

body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 16px;
  font-family: 'Press Start 2P', ui-monospace, 'Courier New', monospace;
  font-size: 12px;
  line-height: 1.6;
  -webkit-font-smoothing: none;
  background-image: radial-gradient(#1a1c2c 1px, transparent 1px);
  background-size: 8px 8px;
}

.app {
  width: min(100%, 720px, max(340px, calc((100vh - 400px) * 1.375)));
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.px {
  background: var(--panel);
  margin: var(--p);
  box-shadow:
    0 calc(var(--p) * -1) 0 0 var(--frame),
    0 var(--p) 0 0 var(--frame),
    calc(var(--p) * -1) 0 0 0 var(--frame),
    var(--p) 0 0 0 var(--frame);
}

.logo {
  margin: 0;
  text-align: center;
  font-size: clamp(22px, 6vw, 36px);
  font-weight: normal;
  letter-spacing: 2px;
}
.logo-word { color: var(--lime); text-shadow: 4px 4px 0 var(--teal); }
.logo-snake { color: var(--yellow); text-shadow: 4px 4px 0 var(--orange); margin-left: 0.4em; }

.hud {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 4px;
  min-width: 0;
}
.label { font-size: 8px; color: var(--muted); }
.value { font-size: clamp(11px, 3vw, 16px); color: var(--yellow); }

.quiz { padding: 12px; }

.quiz-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 9px;
}
.tag {
  background: var(--blue);
  color: var(--panel);
  padding: 4px 6px;
}
.reward { color: var(--lime); }

.question {
  margin: 10px 0;
  font-size: clamp(10px, 2.6vw, 13px);
  line-height: 1.8;
  min-height: 3.6em;
}

.slots {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  min-height: clamp(30px, 8.4vw, 46px);
}
.slot {
  width: clamp(26px, 7vw, 38px);
  height: clamp(30px, 8.4vw, 46px);
  display: grid;
  place-items: center;
  font-size: clamp(13px, 3.6vw, 20px);
  background: var(--panel-2);
  color: var(--panel);
  border-bottom: var(--p) solid var(--dim);
}
.slot.filled {
  background: var(--yellow);
  border-bottom-color: var(--orange);
  animation: pop 0.2s steps(2);
}
.slot.win {
  background: var(--lime);
  border-bottom-color: var(--green);
  animation: hop 0.5s steps(2) calc(var(--i) * 60ms) both;
}
.slot.lose {
  background: var(--red);
  color: var(--ink);
  border-bottom-color: #5d275d;
  animation: shake 0.3s steps(3);
}
.slot.reveal {
  background: var(--dim);
  color: var(--ink);
  border-bottom-color: var(--frame);
}

.message {
  margin: 10px 0 0;
  min-height: 1.6em;
  font-size: clamp(8px, 2.2vw, 10px);
  text-align: center;
  color: var(--muted);
}
.message.good { color: var(--lime); }
.message.bad { color: var(--red-ink); }

@keyframes pop { 0% { transform: scale(1.25); } }
@keyframes hop { 50% { transform: translateY(-6px); } }
@keyframes shake {
  33% { transform: translateX(-4px); }
  66% { transform: translateX(4px); }
}

.board-wrap {
  position: relative;
  background: var(--bg);
}
.board-wrap canvas {
  display: block;
  width: 100%;
  height: auto;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.board-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(to bottom, rgba(0, 0, 0, 0.16) 0 2px, transparent 2px 4px);
}

.overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  padding: 8px;
  overflow: auto;
  background: rgba(15, 16, 32, 0.84);
  text-align: center;
}
.panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(6px, 1.8vw, 12px);
  max-width: 100%;
}
.panel p { margin: 0; }
.big { font-size: clamp(16px, 4.5vw, 28px); color: var(--yellow); text-shadow: 3px 3px 0 var(--orange); }
.big.bad { color: var(--red-ink); text-shadow: 3px 3px 0 var(--red); }
.reason, .final { font-size: clamp(8px, 2.2vw, 12px); }
.final b { color: var(--yellow); font-weight: normal; }
.final.good { color: var(--lime); }
.hint { font-size: 8px; color: var(--muted); }

.ask {
  background: var(--panel);
  gap: clamp(5px, 1.4vw, 8px);
  padding: clamp(8px, 2vw, 14px);
  margin: var(--p);
  box-shadow:
    0 calc(var(--p) * -1) 0 0 var(--yellow),
    0 var(--p) 0 0 var(--yellow),
    calc(var(--p) * -1) 0 0 0 var(--yellow),
    var(--p) 0 0 0 var(--yellow);
  animation: pop 0.2s steps(2);
}
.ask .tag { font-size: clamp(7px, 1.8vw, 9px); }
.ask-question {
  font-size: clamp(9px, 2.4vw, 13px);
  line-height: 1.7;
  max-width: 34em;
}
.ask .btn-go { padding: 10px 18px; }
.ask-info { font-size: clamp(7px, 1.9vw, 10px); color: var(--lime); }

.rules {
  list-style: none;
  margin: 0;
  padding: 0;
  text-align: left;
  font-size: clamp(7px, 1.9vw, 10px);
  line-height: 1.6;
  display: grid;
  gap: clamp(4px, 1.2vw, 8px);
}
.rules li { display: flex; align-items: center; gap: 8px; }
.icon {
  flex: none;
  width: 2.6em;
  text-align: center;
  padding: 3px 0;
  color: var(--panel);
}
.icon.q { background: var(--blue); }
.icon.a { background: var(--yellow); }
.icon.bad { background: var(--red-ink); }
.icon.good { background: var(--lime); }

.blink { animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.btn {
  font: inherit;
  font-size: clamp(8px, 2.2vw, 10px);
  color: var(--ink);
  background: var(--panel-2);
  border: 0;
  padding: 10px 12px;
  margin: var(--p);
  cursor: pointer;
  box-shadow:
    0 calc(var(--p) * -1) 0 0 var(--frame),
    0 var(--p) 0 0 var(--frame),
    calc(var(--p) * -1) 0 0 0 var(--frame),
    var(--p) 0 0 0 var(--frame),
    inset -3px -3px 0 0 rgba(0, 0, 0, 0.35),
    inset 3px 3px 0 0 rgba(255, 255, 255, 0.12);
  user-select: none;
}
.btn:hover { background: var(--frame); }
.btn:active { transform: translate(2px, 2px); }
.btn:focus-visible { outline: 3px solid var(--blue); outline-offset: 6px; }
.btn[aria-pressed="true"] { background: var(--teal); }
.btn-go { background: var(--green); color: var(--panel); font-size: clamp(10px, 2.8vw, 14px); padding: 12px 18px; }
.btn-go:hover { background: var(--lime); }

.speed { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px; }
.speed .btn { padding: 8px 10px; }

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px; }

.help {
  margin: 0;
  text-align: center;
  font-size: 8px;
  color: var(--dim);
  line-height: 2;
}

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