:root {
  color-scheme: dark;
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "Hiragino Sans", "Yu Gothic",
    serif;
  background: #07101c;
  color: #f4f1e6;
  --navy: #07101c;
  --panel: rgba(12, 28, 46, 0.88);
  --line: #2a415c;
  --mint: #53e0b7;
  --mint-dark: #0b1c18;
  --firefly: #ffe08a;
  --firefly-hot: #ffd45c;
  --muted: #9eb0c6;
  --stone: #14304a;
  --water: #0a1828;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 12% 8%, rgba(255, 224, 138, 0.16), transparent 18rem),
    radial-gradient(circle at 88% 12%, rgba(83, 224, 183, 0.14), transparent 22rem),
    linear-gradient(180deg, #0b1730 0%, #07101c 42%, #091422 100%);
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  padding: 0.6rem 0.9rem;
  background: var(--mint);
  color: var(--mint-dark);
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  font-weight: 700;
  text-decoration: none;
  border-radius: 999px;
}

.skip:focus {
  top: 1rem;
}

header,
main {
  width: min(94vw, 640px);
  margin: 0 auto;
}

header {
  padding: 1.5rem 0 0.5rem;
}

.back {
  display: inline-block;
  margin-bottom: 1.4rem;
  color: var(--mint);
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
}

.back:hover {
  text-decoration: underline;
}

.eyebrow {
  margin: 0 0 0.6rem;
  color: var(--mint);
  font-family: Inter, "Helvetica Neue", sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

h1 {
  margin: 0;
  font-size: clamp(2.4rem, 9vw, 3.6rem);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.lead,
.help,
.storage-note {
  color: var(--muted);
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.7;
}

.lead {
  margin: 0.8rem 0 0;
  font-size: 1.05rem;
}

.hud {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.6rem;
  margin: 1.6rem 0 1rem;
}

.hud p {
  margin: 0;
  padding: 0.75rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  background: var(--panel);
  text-align: center;
}

.hud .label {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--mint);
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.hud span:last-child {
  font-size: 1.05rem;
}

.status {
  min-height: 3.2rem;
  margin: 0 0 1rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--panel);
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
}

.status.is-win {
  border-color: #d7b35a;
  color: var(--firefly);
}

.status.is-stuck {
  border-color: #c9847a;
  color: #ffd4cc;
}

.board {
  display: grid;
  gap: 0.38rem;
  width: min(100%, 420px);
  margin: 0 auto;
  padding: 0.85rem;
  border: 1px solid #35506c;
  border-radius: 1.4rem;
  background:
    radial-gradient(circle at 50% 20%, rgba(255, 224, 138, 0.08), transparent 12rem),
    #0a1a2e;
  touch-action: none;
}

.cell {
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 0.85rem;
  background: var(--stone);
  box-shadow: inset 0 0 0 1px rgba(83, 224, 183, 0.12);
  color: #d7e6f3;
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  font-size: clamp(0.7rem, 2.6vw, 0.9rem);
  user-select: none;
  cursor: pointer;
}

.cell.is-blocked {
  background: repeating-linear-gradient(
    135deg,
    #071422,
    #071422 6px,
    #0b1a2c 6px,
    #0b1a2c 12px
  );
  box-shadow: none;
  cursor: default;
}

.cell.is-lit {
  background: #1d5b4d;
  box-shadow: inset 0 0 0 1px rgba(83, 224, 183, 0.45);
  color: var(--mint);
  cursor: default;
}

.cell.is-current {
  background: var(--firefly-hot);
  color: #3a2a08;
  font-weight: 700;
  box-shadow: 0 0 0 3px rgba(255, 224, 138, 0.35), 0 0 24px rgba(255, 212, 92, 0.55);
  animation: pulse 1.6s ease-in-out infinite;
}

.cell.is-reachable:not(.is-current):not(.is-lit) {
  box-shadow: inset 0 0 0 2px rgba(255, 224, 138, 0.7);
}

.cell:focus-visible,
.back:focus-visible,
button:focus-visible,
.board:focus-visible {
  outline: 3px solid var(--firefly);
  outline-offset: 3px;
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.04);
  }
}

.help {
  margin: 0.8rem auto 1.2rem;
  max-width: 42rem;
  font-size: 0.92rem;
  text-align: center;
}

.actions,
.dpad,
.level-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
}

.actions {
  margin-bottom: 1rem;
}

button {
  min-height: 2.75rem;
  padding: 0.7rem 1.1rem;
  border: 0;
  border-radius: 999px;
  background: var(--mint);
  color: var(--mint-dark);
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

button:hover:not(:disabled) {
  background: #7aead0;
}

button:disabled {
  background: #314155;
  color: #8a9bb0;
  cursor: not-allowed;
}

.dpad {
  display: grid;
  grid-template-columns: repeat(3, 4.2rem);
  grid-template-areas:
    ". up ."
    "left down right";
  gap: 0.45rem;
  width: max-content;
  margin: 0 auto 1.8rem;
}

.dpad button {
  min-height: 3.2rem;
  padding: 0;
  border-radius: 1rem;
  font-size: 1.1rem;
}

.dpad [data-dir="up"] {
  grid-area: up;
}

.dpad [data-dir="left"] {
  grid-area: left;
}

.dpad [data-dir="down"] {
  grid-area: down;
}

.dpad [data-dir="right"] {
  grid-area: right;
}

.levels {
  margin: 0 0 1.5rem;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: var(--panel);
}

h2 {
  margin: 0 0 0.9rem;
  font-size: 1.05rem;
  letter-spacing: 0.12em;
}

.level-list button {
  min-width: 3rem;
  padding: 0.65rem 0.85rem;
  background: #173047;
  color: #f4f1e6;
}

.level-list button.is-current {
  background: var(--firefly-hot);
  color: #3a2a08;
}

.level-list button.is-cleared:not(.is-current) {
  background: #1b5c4f;
  color: var(--mint);
}

.storage-note {
  margin: 0 0 0.8rem;
  font-size: 0.92rem;
}

.ghost {
  display: block;
  margin: 0 auto 2.5rem;
  background: transparent;
  color: var(--mint);
  box-shadow: inset 0 0 0 2px var(--mint);
}

.ghost:hover:not(:disabled) {
  background: rgba(83, 224, 183, 0.12);
}

@media (prefers-reduced-motion: reduce) {
  .cell.is-current {
    animation: none;
  }
}

@media (max-width: 560px) {
  .hud {
    grid-template-columns: 1fr 1fr;
  }

  .cell {
    border-radius: 0.65rem;
  }

  header {
    padding-top: 1.1rem;
  }
}

.share-x {
  min-height: 44px;
  padding: 0 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #12324a;
  color: var(--firefly);
  font-weight: 800;
  cursor: pointer;
}
.share-x[hidden] { display: none !important; }
.share-x:hover { border-color: var(--mint); }