:root {
  --tetris-bg: #07111f;
  --tetris-panel: rgba(255, 255, 255, 0.08);
  --tetris-panel-strong: rgba(255, 255, 255, 0.13);
  --tetris-line: rgba(255, 255, 255, 0.16);
  --tetris-text: #f6fbff;
  --tetris-muted: rgba(246, 251, 255, 0.66);
  --tetris-cyan: #20d6ff;
  --tetris-green: #37e7a0;
  --tetris-gold: #f5b64b;
}

.tetris-page {
  min-height: calc(100vh - 78px);
  color: var(--tetris-text);
  background:
    radial-gradient(circle at 18% 12%, rgba(32, 214, 255, 0.2), transparent 30rem),
    radial-gradient(circle at 86% 86%, rgba(245, 182, 75, 0.15), transparent 28rem),
    linear-gradient(135deg, #07111f 0%, #0b2146 52%, #04142a 100%);
}

.tetris-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(24px, 4vw, 46px) 0;
}

.tetris-heading {
  display: grid;
  gap: 8px;
  margin-bottom: 20px;
}

.tetris-heading h1 {
  margin: 0;
  font-size: clamp(36px, 6vw, 68px);
  line-height: 1.05;
}

.tetris-heading p:last-child {
  max-width: 680px;
  margin: 0;
  color: var(--tetris-muted);
  font-size: clamp(15px, 2vw, 18px);
}

.tetris-back {
  width: fit-content;
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border: 1px solid var(--tetris-line);
  border-radius: 8px;
  color: var(--tetris-green);
  background: rgba(255, 255, 255, 0.06);
  font-size: 12px;
  font-weight: 900;
}

.tetris-stage {
  display: grid;
  grid-template-columns: minmax(320px, 520px) minmax(280px, 360px);
  gap: 22px;
  align-items: start;
}

.tetris-board-card,
.tetris-side-card {
  border: 1px solid var(--tetris-line);
  border-radius: 14px;
  background: rgba(7, 17, 31, 0.7);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(16px);
}

.tetris-board-card {
  padding: clamp(12px, 2vw, 18px);
}

.tetris-board-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
}

.tetris-board-top div {
  display: grid;
  gap: 2px;
}

.tetris-board-top span,
.tetris-stats span,
.tetris-previews span {
  color: var(--tetris-muted);
  font-size: 12px;
  font-weight: 900;
}

.tetris-board-top b {
  color: var(--tetris-cyan);
}

.tetris-board-top strong {
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1;
}

.tetris-icon-button {
  width: 46px;
  height: 46px;
  border: 1px solid var(--tetris-line);
  border-radius: 8px;
  color: var(--tetris-text);
  background: var(--tetris-panel);
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

.tetris-board-wrap {
  position: relative;
  width: min(100%, 420px);
  aspect-ratio: 1 / 2;
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid rgba(32, 214, 255, 0.36);
  border-radius: 10px;
  background: #08111f;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04), 0 0 46px rgba(32, 214, 255, 0.12);
}

#board {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

.tetris-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 14px;
  text-align: center;
  background: rgba(7, 17, 31, 0.82);
}

.tetris-overlay.is-hidden {
  display: none;
}

.tetris-overlay p {
  margin: 0;
  font-size: clamp(30px, 8vw, 58px);
  font-weight: 900;
  line-height: 1;
}

.tetris-overlay button,
.tetris-actions button,
.tetris-touch-controls button {
  min-height: 44px;
  border: 1px solid var(--tetris-line);
  border-radius: 8px;
  color: var(--tetris-text);
  background: var(--tetris-panel-strong);
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

.tetris-side-card {
  display: grid;
  gap: 14px;
  padding: 18px;
}

.tetris-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.tetris-stats div,
.tetris-previews div {
  border: 1px solid var(--tetris-line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
}

.tetris-stats div {
  min-height: 82px;
  display: grid;
  align-content: space-between;
  padding: 14px;
}

.tetris-stats strong {
  font-size: 28px;
  line-height: 1;
}

.tetris-previews {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.tetris-previews div {
  padding: 12px;
}

.tetris-previews canvas {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  margin-top: 8px;
  border-radius: 8px;
  background: #08111f;
}

.tetris-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.tetris-actions button:first-child {
  color: #07111f;
  background: linear-gradient(135deg, var(--tetris-cyan), var(--tetris-green));
}

.tetris-keys {
  display: grid;
  gap: 9px;
  color: var(--tetris-muted);
  font-size: 13px;
}

.tetris-keys div {
  display: flex;
  align-items: center;
  gap: 7px;
}

.tetris-keys kbd {
  min-width: 31px;
  height: 28px;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--tetris-line);
  border-bottom-color: rgba(255, 255, 255, 0.34);
  border-radius: 6px;
  color: var(--tetris-text);
  background: rgba(255, 255, 255, 0.1);
  font: 900 12px/1 Arial, sans-serif;
}

.tetris-touch-controls {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.tetris-touch-controls button {
  font-size: 18px;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

@media (hover: hover) {
  .tetris-icon-button:hover,
  .tetris-overlay button:hover,
  .tetris-actions button:hover,
  .tetris-touch-controls button:hover,
  .tetris-back:hover {
    transform: translateY(-1px);
  }
}

@media (max-width: 900px) {
  .tetris-stage {
    grid-template-columns: 1fr;
  }

  .tetris-side-card {
    order: -1;
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .tetris-stats,
  .tetris-previews,
  .tetris-actions {
    grid-column: span 1;
  }

  .tetris-keys {
    display: none;
  }
}

@media (max-width: 560px) {
  .tetris-shell {
    width: min(100% - 14px, 430px);
    padding-top: 14px;
  }

  .tetris-heading {
    margin-bottom: 12px;
  }

  .tetris-heading h1 {
    font-size: 34px;
  }

  .tetris-heading p:last-child {
    font-size: 14px;
  }

  .tetris-side-card {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 12px;
  }

  .tetris-stats {
    grid-template-columns: 1fr 1fr;
  }

  .tetris-stats div {
    min-height: 64px;
    padding: 10px;
  }

  .tetris-stats strong {
    font-size: 22px;
  }

  .tetris-previews {
    grid-template-columns: 1fr 1fr;
  }

  .tetris-previews div {
    padding: 9px;
  }

  .tetris-actions {
    grid-template-columns: 1fr 1fr;
  }

  .tetris-board-card {
    padding: 10px;
  }

  .tetris-board-wrap {
    width: min(100%, calc(100vh - 310px) / 2);
    min-width: 278px;
  }

  .tetris-touch-controls {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 360px) {
  .tetris-board-wrap {
    min-width: 0;
    width: 100%;
  }

  .tetris-touch-controls button {
    min-height: 42px;
  }
}