:root {
  color-scheme: dark;
  --bg: #080613;
  --panel: #141126;
  --panel-strong: #21183f;
  --grid: #2dfcff;
  --text: #fff8d7;
  --muted: #a9a4ff;
  --accent: #f8ff2f;
  --accent-dark: #d7b500;
  --danger: #ff2d75;
  --cyan: #2dfcff;
  --pink: #ff2d75;
  --lime: #7cff2d;
  --violet: #8f5cff;
  --cell: 32px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    linear-gradient(rgba(45, 252, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 45, 117, 0.04) 1px, transparent 1px),
    radial-gradient(circle at top left, rgba(255, 45, 117, 0.22), transparent 31rem),
    radial-gradient(circle at bottom right, rgba(45, 252, 255, 0.18), transparent 28rem),
    linear-gradient(135deg, #080613 0%, #171033 52%, #080613 100%);
  background-size: 34px 34px, 34px 34px, auto, auto, auto;
  color: var(--text);
}

button {
  font: inherit;
}

.app {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.game-shell {
  --column-gap: 12px;
  --board-width: min(calc((100vh - 150px) * 2 / 3), calc((100vw - 48px - var(--column-gap)) * 0.7), 620px);
  --sidebar-width: max(120px, calc(var(--board-width) * 0.428571));
  width: min(100%, 900px);
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  width: fit-content;
  min-width: calc(var(--board-width) + var(--column-gap) + var(--sidebar-width));
  max-width: 100%;
  margin-inline: auto;
  margin-bottom: 10px;
}

h1 {
  width: max-content;
  margin: 0;
  font-family: "Arial Narrow", "Roboto Condensed", "Helvetica Neue", Arial, sans-serif;
  font-stretch: condensed;
  text-transform: uppercase;
  font-size: clamp(1.5rem, 4.3vw, 2.75rem);
  line-height: 0.88;
  letter-spacing: 0.04em;
  transform: skewX(-10deg) scaleX(0.82) rotate(-2deg);
  transform-origin: left center;
  color: #4df7ff;
  text-shadow:
    0 0 1px rgba(77, 247, 255, 0.95),
    0 0 9px rgba(77, 247, 255, 0.52),
    0 0 20px rgba(143, 92, 255, 0.38),
    0 0 34px rgba(143, 92, 255, 0.24),
    0 10px 18px rgba(77, 247, 255, 0.22),
    0 18px 32px rgba(255, 45, 117, 0.18),
    2px 1px 0 rgba(255, 45, 117, 0.48);
  animation: logo-flicker 8s linear infinite;
}

@keyframes logo-flicker {
  0%,
  71%,
  73%,
  76%,
  100% {
    opacity: 1;
    text-shadow:
      0 0 1px rgba(77, 247, 255, 0.95),
      0 0 9px rgba(77, 247, 255, 0.52),
      0 0 20px rgba(143, 92, 255, 0.38),
      0 0 34px rgba(143, 92, 255, 0.24),
      0 10px 18px rgba(77, 247, 255, 0.22),
      0 18px 32px rgba(255, 45, 117, 0.18),
      2px 1px 0 rgba(255, 45, 117, 0.48);
  }

  72%,
  74.5% {
    opacity: 0.28;
    text-shadow:
      0 0 1px rgba(77, 247, 255, 0.38),
      0 0 5px rgba(77, 247, 255, 0.16),
      2px 1px 0 rgba(255, 45, 117, 0.18);
  }

  75.2% {
    opacity: 0.05;
    text-shadow: none;
  }
}

p {
  margin: 8px 0 0;
  color: var(--muted);
}

.play-area {
  display: grid;
  width: fit-content;
  max-width: 100%;
  grid-template-columns: var(--board-width) var(--sidebar-width);
  gap: var(--column-gap);
  align-items: start;
  margin-inline: auto;
}

.board-wrap {
  position: relative;
  width: var(--board-width);
  aspect-ratio: 2 / 3;
}

canvas {
  display: block;
  image-rendering: crisp-edges;
}

#board {
  width: 100%;
  height: 100%;
  border: 1px solid rgba(45, 252, 255, 0.74);
  background: #09071a;
  box-shadow:
    0 0 0 1px rgba(255, 45, 117, 0.34),
    0 0 28px rgba(45, 252, 255, 0.22),
    0 24px 58px rgba(0, 0, 0, 0.45);
  touch-action: none;
}

.side-panel {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.stat-row,
.next-box,
.controls {
  background: linear-gradient(180deg, rgba(33, 24, 63, 0.9), rgba(12, 9, 28, 0.92));
  border: 1px solid rgba(45, 252, 255, 0.22);
  border-radius: 8px;
  padding: 14px;
  box-shadow: inset 0 0 18px rgba(143, 92, 255, 0.12);
}

.stat-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
}

.stat-row span,
.panel-heading span,
.controls span {
  color: var(--muted);
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stat-row strong {
  font-size: 1.8rem;
  line-height: 1;
  color: var(--accent);
  text-shadow: 0 0 12px rgba(248, 255, 47, 0.42);
}

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

#nextPiece {
  width: 128px;
  height: 128px;
  margin: 0 auto 14px;
}

.command,
.primary,
.icon-button {
  border: 0;
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
}

.command {
  background: var(--panel-strong);
  padding: 10px 14px;
  border: 1px solid rgba(45, 252, 255, 0.28);
  box-shadow: 0 0 14px rgba(143, 92, 255, 0.18);
}

.primary {
  width: 100%;
  min-height: 42px;
  background: var(--accent);
  color: #191300;
  font-weight: 800;
  box-shadow:
    0 0 16px rgba(248, 255, 47, 0.28),
    inset 0 -2px 0 rgba(0, 0, 0, 0.22);
}

.icon-button {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: var(--panel-strong);
  border: 1px solid rgba(45, 252, 255, 0.28);
  font-size: 1.35rem;
  box-shadow: 0 0 14px rgba(255, 45, 117, 0.16);
}

.command:hover,
.icon-button:hover {
  background: #302257;
}

.primary:hover {
  background: #fff96a;
}

.primary:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.controls {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 10px;
  align-items: center;
}

.controls span {
  grid-column: 1 / -1;
  margin-bottom: 2px;
}

kbd {
  min-width: 52px;
  border-radius: 6px;
  background: #09071a;
  border: 1px solid rgba(255, 45, 117, 0.42);
  padding: 4px 7px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--cyan);
  box-shadow: inset 0 0 10px rgba(45, 252, 255, 0.08);
}

small {
  color: var(--muted);
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(8, 6, 19, 0.78);
  padding: 22px;
}

.overlay[hidden] {
  display: none;
}

.overlay-panel {
  width: min(100%, 230px);
  display: grid;
  gap: 10px;
  padding: 18px;
  border-radius: 8px;
  background: #141126;
  border: 1px solid rgba(45, 252, 255, 0.34);
  text-align: center;
  box-shadow: 0 0 28px rgba(255, 45, 117, 0.24);
}

.overlay-panel strong {
  font-size: 1.35rem;
}

.overlay-panel span {
  color: var(--muted);
}

@media (max-width: 650px) {
  .game-shell {
    --column-gap: 8px;
    --board-width: min(calc((100vh - 140px) * 2 / 3), calc((100vw - 20px - var(--column-gap)) * 0.7));
    --sidebar-width: max(108px, calc(var(--board-width) * 0.428571));
  }

  .app {
    padding: 10px;
    place-items: center;
  }

  .topbar {
    align-items: start;
    flex-direction: column;
  }

  .play-area {
    grid-template-columns: var(--board-width) var(--sidebar-width);
    gap: var(--column-gap);
  }

  .board-wrap {
    margin-inline: auto;
  }

  .side-panel {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .next-box,
  .controls {
    grid-column: auto;
  }
}