html,
body {
  margin: 0;
  background: #050812;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

.tetris-board-wrap,
.tetris-board-wrap * {
  box-sizing: border-box;
}

.tetris-board-wrap {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  min-height: 0;
  overflow: hidden;
  border-radius: 14px;
  border-color: rgba(101, 231, 255, 0.16);
  box-shadow: none;
  background:
    radial-gradient(circle at 50% 16%, rgba(101, 231, 255, 0.12), transparent 34%),
    radial-gradient(circle at 80% 72%, rgba(167, 255, 122, 0.08), transparent 30%),
    linear-gradient(180deg, #07111f 0%, #050812 100%);
}

.tetris-hud {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.tetris-canvas-frame {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px 132px 16px 16px;
}

#tetris-canvas {
  display: block;
  max-width: 100%;
  max-height: 100%;
  border-radius: 16px;
  background: #06101d;
  box-shadow:
    0 24px 70px rgba(0, 0, 0, 0.42),
    0 0 0 1px rgba(101, 231, 255, 0.16);
  touch-action: none;
}

.tetris-next-panel,
.tetris-overlay__card,
.tetris-touch-controls {
  border: 1px solid rgba(101, 231, 255, 0.14);
  background: rgba(6, 12, 22, 0.72);
  box-shadow: 0 20px 54px rgba(0, 0, 0, 0.28);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.tetris-next-panel {
  position: absolute;
  z-index: 12;
  top: 14px;
  right: 14px;
  display: grid;
  place-items: center;
  width: 104px;
  padding: 10px;
  border-radius: 16px;
}

.tetris-next {
  display: grid;
  justify-items: center;
  min-width: 0;
}

.tetris-panel-title,
.tetris-eyebrow {
  display: block;
  margin: 0 0 6px;
  color: #65e7ff;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.14em;
  line-height: 1.2;
  text-transform: uppercase;
}

#tetris-next-canvas {
  display: block;
  width: 76px;
  height: 76px;
  border-radius: 14px;
  background: rgba(4, 10, 18, 0.76);
}

.tetris-overlay {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(4, 8, 15, 0.42);
  opacity: 1;
  pointer-events: auto;
  transition: opacity 0.18s ease;
}

.tetris-overlay[hidden] {
  display: grid;
  opacity: 0;
  pointer-events: none;
}

.tetris-overlay__card {
  width: min(86%, 310px);
  padding: 22px;
  border-radius: 18px;
  text-align: center;
}

.tetris-overlay__card h2 {
  margin: 0;
  color: #f6fbff;
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1;
}

.tetris-overlay__card p {
  margin: 10px 0 0;
  color: rgba(238, 244, 255, 0.76);
  line-height: 1.45;
}

.tetris-button,
.tetris-touch-button {
  min-height: 40px;
  border: 1px solid rgba(101, 231, 255, 0.16);
  border-radius: 13px;
  padding: 9px 13px;
  color: #eef4ff;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.07);
  transition: transform 0.14s ease, border-color 0.14s ease, background 0.14s ease;
  touch-action: manipulation;
}

.tetris-button:hover,
.tetris-touch-button:hover {
  transform: translateY(-1px);
  border-color: rgba(101, 231, 255, 0.34);
  background: rgba(101, 231, 255, 0.1);
}

.tetris-button:active,
.tetris-touch-button:active,
.tetris-touch-button.is-active {
  transform: translateY(1px) scale(0.98);
  background: rgba(101, 231, 255, 0.18);
}

.tetris-button--primary {
  color: #04101c;
  border-color: rgba(101, 231, 255, 0.42);
  background: linear-gradient(180deg, #8df1ff, #4fbdff);
}

.tetris-touch-controls {
  position: absolute;
  z-index: 14;
  left: 50%;
  bottom: 14px;
  transform: translateX(-50%);
  display: grid;
  grid-template-columns: repeat(5, minmax(52px, 1fr));
  gap: 8px;
  width: min(520px, calc(100% - 28px));
  padding: 8px;
  border-radius: 16px;
}

.tetris-touch-button {
  min-height: 52px;
  padding: 8px;
  -webkit-user-select: none;
  user-select: none;
}

.tetris-touch-button--drop {
  min-width: 84px;
}

@media (min-width: 981px) {
  .tetris-touch-controls {
    display: none;
  }
}

@media (max-width: 980px) {
  .tetris-hud {
    grid-template-columns: repeat(4, minmax(78px, 1fr));
  }

  .tetris-canvas-frame {
    padding: 14px 112px 82px 14px;
  }

  .tetris-next-panel {
    top: 12px;
    right: 12px;
    width: 88px;
    padding: 8px;
  }

  #tetris-next-canvas {
    width: 62px;
    height: 62px;
  }
}

@media (max-width: 520px) {
  .tetris-hud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tetris-canvas-frame {
    padding: 12px 84px 78px 12px;
  }

  .tetris-next-panel {
    width: 70px;
    padding: 7px;
  }

  .tetris-panel-title {
    font-size: 8px;
  }

  #tetris-next-canvas {
    width: 50px;
    height: 50px;
  }

  .tetris-touch-controls {
    bottom: 10px;
    width: calc(100% - 20px);
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .tetris-touch-button {
    min-height: 48px;
    font-size: 16px;
  }
}