:root {
  color-scheme: dark;
  --game-bg: #111214;
  --game-bg-soft: rgba(17, 18, 20, 0.78);
  --ink: #f1f1f1;
  --muted: #b8b8b8;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  overflow-x: hidden;
  overflow-y: auto;
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono",
    monospace;
  background: var(--game-bg);
}

.page {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 16px;
}

.shell {
  width: min(920px, 100%);
}

.game-title {
  margin: 0 0 10px;
  color: rgba(241, 241, 241, 0.72);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  text-align: left;
}

.topbar {
  display: none;
}

.stage {
  position: relative;
  padding: 0;
}

canvas {
  display: block;
  width: 100%;
  height: clamp(300px, 58vh, 520px);
  border-radius: 0;
  background: var(--game-bg);
  image-rendering: pixelated;
  touch-action: manipulation;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  align-content: start;
  justify-items: center;
  gap: 10px;
  text-align: center;
  padding: 18px 20px;
  border-radius: 0;
  background: var(--game-bg-soft);
  backdrop-filter: blur(1px);
  pointer-events: none;
  overflow: hidden;
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.overlay.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.overlay__title {
  margin: 0;
  font-size: clamp(16px, 2.5vw, 24px);
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.overlay__text {
  margin: 6px 0 0;
  max-width: 38rem;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.name-form,
.leaderboard {
  width: min(360px, 100%);
}

.name-form {
  margin-top: 4px;
}

.name-form__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.name-form input,
.name-form button,
.restart-button {
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  font: inherit;
  transition:
    border-color 120ms ease,
    background-color 120ms ease,
    color 120ms ease,
    transform 120ms ease,
    opacity 120ms ease;
  font-size: 13px;
}

.name-form input {
  min-width: 0;
  padding: 9px 12px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.04);
  outline: none;
}

.name-form input::placeholder {
  color: rgba(241, 241, 241, 0.38);
}

.name-form input:focus {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.06);
}

.name-form button,
.restart-button {
  padding: 9px 14px;
  color: #111214;
  background: #f1f1f1;
  cursor: pointer;
  font-weight: 700;
}

.name-form button:hover,
.restart-button:hover {
  transform: translateY(-1px);
}

.name-form button:disabled,
.restart-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.leaderboard {
  display: grid;
  gap: 6px;
  margin-top: 2px;
}

.leaderboard__head,
.leaderboard__row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 56px;
  align-items: center;
  gap: 8px;
}

.leaderboard__head {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0 10px;
}

.leaderboard__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.leaderboard__row,
.leaderboard__empty {
  padding: 7px 10px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.035);
  font-size: 13px;
  line-height: 1.15;
}

.leaderboard__empty {
  color: var(--muted);
}

.leaderboard__rank {
  color: var(--muted);
  font-size: 13px;
}

.leaderboard__name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard__score {
  justify-self: end;
  color: var(--ink);
  font-size: 13px;
}

.restart-button {
  justify-self: center;
  min-width: 140px;
  margin-top: 2px;
}

.footer {
  display: none;
}

.ghost {
  display: none;
}

@media (max-width: 720px) {
  .page {
    padding: 10px;
  }

  .overlay {
    padding: 14px 12px 74px;
    gap: 8px;
  }

  .name-form,
  .leaderboard {
    width: min(340px, 100%);
  }

  .overlay__title {
    font-size: clamp(15px, 4vw, 20px);
  }

  .overlay__text {
    font-size: 12px;
  }

  .name-form input,
  .name-form button,
  .restart-button {
    padding: 8px 12px;
    font-size: 12px;
  }

  .leaderboard__row,
  .leaderboard__empty {
    padding: 6px 8px;
    font-size: 12px;
  }

  .leaderboard__head {
    font-size: 9px;
  }

  .restart-button {
    position: absolute;
    left: 50%;
    bottom: 12px;
    z-index: 1;
    width: min(140px, 70vw);
    min-width: 0;
    margin-top: 0;
    transform: translateX(-50%);
  }
}

@media (max-height: 760px) {
  canvas {
    height: clamp(240px, 52vh, 420px);
  }

  .overlay {
    padding: 12px 14px 72px;
    gap: 8px;
  }

  .overlay__text {
    font-size: 12px;
    line-height: 1.35;
  }

  .restart-button {
    position: absolute;
    left: 50%;
    bottom: 10px;
    z-index: 1;
    width: min(140px, 70vw);
    min-width: 0;
    margin-top: 0;
    transform: translateX(-50%);
  }
}