.tetris-btn {
  --btn-bg: linear-gradient(180deg, #36396a 0%, #181c2b 100%);
  --btn-glow: 0 0 24px 2px #7f5cff, 0 2px 16px 2px #181c2b inset;
  --btn-border: 4px solid #7f5cff;
  --btn-shadow: 0 8px 0 #2e2459, 0 0 32px #7f5cff;
  background: var(--btn-bg);
  border: var(--btn-border);
  border-radius: 16px;
  padding: 28px 48px 34px 48px;
  box-shadow: var(--btn-shadow), var(--btn-glow);
  cursor: pointer;
  outline: none;
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  transition:
    box-shadow 0.18s cubic-bezier(0.4, 1.5, 0.6, 1),
    transform 0.14s cubic-bezier(0.5, 2, 0.5, 1.5),
    border-color 0.18s;
  z-index: 1;
  overflow: visible;
  user-select: none;
}
.tetris-btn:before {
  content: "";
  display: block;
  pointer-events: none;
  position: absolute;
  inset: 0;
  border-radius: 12px;
  opacity: 0.13;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 2px,
    #fff 2px 3px,
    transparent 3px 5px
  );
  z-index: 4;
  transition: opacity 0.2s;
}
.tetris-btn:focus-visible {
  border-color: #ffe866;
  box-shadow:
    0 0 0 4px #ffe86699,
    0 8px 0 #2e2459,
    0 0 32px #ffe866;
}
.tetris-btn:active {
  transform: scale(0.96) translateY(2px);
  box-shadow:
    0 3px 0 #2e2459,
    0 0 24px #7f5cff;
}
.tetris-labell {
  color: #fffaf6;
  font-family: "Press Start 2P", monospace, monospace;
  margin-top: 22px;
  font-size: 1.1rem;
  letter-spacing: 2px;
  text-align: center;
  display: block;
  z-index: 3;
  position: relative;
  pointer-events: none;
  user-select: none;
  text-shadow:
    2px 2px 0 #2e2459,
    -2px 2px 0 #2e2459,
    2px -2px 0 #2e2459,
    -2px -2px 0 #2e2459,
    0 0 8px #7f5cff,
    0 0 12px #ffe866;
  animation: text-glow 2s ease-in-out infinite alternate;
}
.tetris-btn:hover .tetris-labele {
  color: #ffe866;
  text-shadow:
    2px 2px 0 #2e2459,
    -2px 2px 0 #2e2459,
    2px -2px 0 #2e2459,
    -2px -2px 0 #2e2459,
    0 0 12px #ffe866,
    0 0 18px #ffe866,
    0 0 24px #ffe866;
  transform: scale(1.05);
  letter-spacing: 3px;
}

@keyframes text-glow {
  from {
    filter: brightness(1);
    transform: scale(1);
  }
  to {
    filter: brightness(1.2);
    transform: scale(1.03);
  }
}

@keyframes start-text-glow {
  from {
    text-shadow: 0 0 8px #7f5cff;
    color: #fffaf6;
  }
  to {
    text-shadow:
      0 0 12px #ffe866,
      0 0 20px #7f5cff;
    color: #fff;
  }
}

.tetris-btn:hover .tetris-label {
  animation: start-text-glow-hover 1s ease-in-out infinite alternate;
}

@keyframes start-text-glow-hover {
  from {
    text-shadow:
      0 0 12px #ffe866,
      0 0 20px #7f5cff;
    color: #fff;
  }
  to {
    text-shadow:
      0 0 16px #ffe866,
      0 0 24px #7f5cff;
    color: #fff;
  }
}
.tetris-piece {
  display: grid;
  grid-template-columns: repeat(3, 24px);
  grid-template-rows: repeat(2, 24px);
  gap: 3px;
  width: 81px;
  height: 51px;
  position: relative;
  margin: 0 auto;
  z-index: 2;
  filter: drop-shadow(0 4px 5px #000a);
  transition: filter 0.2s;
}
.tetris-btn:hover .block,
.tetris-btn:focus-visible .block {
  animation: tetris-fall 0.32s cubic-bezier(0.3, 1.6, 0.6, 1.1);
  animation-fill-mode: forwards;
  box-shadow:
    0 0 16px #ffe866cc,
    0 4px 0 #000a;
  filter: brightness(1.12) drop-shadow(0 1px 8px #ffe86699);
}
@keyframes tetris-fall {
  0% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(14px) scale(1.1);
  }
  70% {
    transform: translateY(8px) scale(1.03);
  }
  100% {
    transform: translateY(0) scale(1);
  }
}
.tetris-btn:hover,
.tetris-btn:focus-visible {
  box-shadow:
    0 0 0 8px #ffe86644,
    0 12px 0 #2e2459,
    0 0 38px #ffe866cc,
    0 0 64px #7f5cff;
  border-color: #ffe866;
}
.t-piece .block {
  background: linear-gradient(135deg, #ffe866 0%, #a259fa 85%, #7f5cff 100%);
  border: 2px solid #fff;
  border-radius: 6px;
  box-shadow:
    0 4px 0 #2e2459,
    0 0 0 1.5px #fff4 inset;
  transition:
    background 0.2s,
    box-shadow 0.18s,
    filter 0.2s,
    transform 0.18s;
  width: 24px;
  height: 24px;
  position: relative;
}
.t-piece .block:after {
  content: "";
  position: absolute;
  top: 2px;
  left: 3px;
  width: 7px;
  height: 7px;
  background: radial-gradient(circle, #fff9 60%, transparent 100%);
  opacity: 0.7;
  border-radius: 2px;
  filter: blur(0.5px);
  pointer-events: none;
}
.t-piece .block:nth-child(1) {
  grid-area: 1 / 1 / 2 / 2;
}
.t-piece .block:nth-child(2) {
  grid-area: 1 / 2 / 2 / 3;
}
.t-piece .block:nth-child(3) {
  grid-area: 1 / 3 / 2 / 4;
}
.t-piece .block:nth-child(4) {
  grid-area: 2 / 2 / 3 / 3;
}
.tetris-btn:after {
  content: "";
  position: absolute;
  inset: -10px;
  border-radius: 20px;
  background: radial-gradient(circle, #ffe86633 0 60%, transparent 100%);
  opacity: 0.7;
  pointer-events: none;
  z-index: 1;
}
@media (max-width: 600px) {
  .tetris-btn {
    padding: 18px 12px 18px 12px;
    border-radius: 10px;
  }
  .tetris-label {
    font-size: 0.9rem;
    margin-top: 13px;
  }
}
@font-face {
  font-family: "Press Start 2P";
  src: url("s://fonts.gstatic.com/s/pressstart2p/v12/e3t4euO8KNHUehQyT0o8fO4.woff2")
    format("woff2");
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}
.tetris-btn {
  position: relative;
}
.tetris-tooltip {
  position: absolute;
  left: 50%;
  top: -140px;
  transform: translateX(-50%) scale(0.96);
  pointer-events: none;
  opacity: 0;
  transition:
    opacity 0.2s,
    transform 0.2s;
  z-index: 100;
  padding-bottom: 8px;
}
.tetris-btn:hover .tetris-tooltip,
.tetris-btn:focus-visible .tetris-tooltip {
  pointer-events: auto;
  opacity: 1;
  transform: translateX(-50%) scale(1.08);
  transition-delay: 0.12s;
}
.falling-piece {
  position: absolute;
  top: 8px;
  left: 10px;
  display: grid;
  grid-template-columns: repeat(3, 16px);
  grid-template-rows: repeat(2, 16px);
  gap: 2px;
  z-index: 20;
  opacity: 0;
}

.falling-block {
  width: 16px;
  height: 16px;
  background: linear-gradient(135deg, #ffe866 0%, #a259fa 85%, #7f5cff 100%);
  border: 1px solid #fff;
  border-radius: 2px;
  box-shadow:
    0 1px 0 #2e2459,
    0 0 4px #ffe866cc;
}

.falling-piece .falling-block:nth-child(1) {
  grid-area: 1 / 1 / 2 / 2;
}
.falling-piece .falling-block:nth-child(2) {
  grid-area: 1 / 2 / 2 / 3;
}
.falling-piece .falling-block:nth-child(3) {
  grid-area: 1 / 3 / 2 / 4;
}
.falling-piece .falling-block:nth-child(4) {
  grid-area: 2 / 2 / 3 / 3;
}

.tetris-btn:hover .falling-piece {
  opacity: 1;
  animation: piece-fall 3s steps(4) forwards;
}

@keyframes piece-fall {
  0% {
    transform: translateY(0);
    opacity: 1;
    filter: brightness(1);
  }
  25% {
    transform: translateY(16px);
    opacity: 1;
    filter: brightness(1);
  }
  50% {
    transform: translateY(32px);
    opacity: 1;
    filter: brightness(1);
  }
  75% {
    transform: translateY(38.5px);
    opacity: 1;
    filter: brightness(1);
  }
  76%,
  78%,
  80%,
  82% {
    transform: translateY(38.5px);
    opacity: 1;
    filter: brightness(2);
  }
  77%,
  79%,
  81%,
  83% {
    transform: translateY(38.5px);
    opacity: 1;
    filter: brightness(1);
  }
  84%,
  100% {
    transform: translateY(38.5px);
    opacity: 0;
  }
}

.tetris-row:nth-child(4) .board-block.filled {
  animation: block-flash 1.5s steps(1) forwards;
  animation-delay: 2s;
}

@keyframes block-flash {
  0% {
    filter: brightness(1);
    background: linear-gradient(135deg, #ffe866 0%, #a259fa 85%, #7f5cff 100%);
  }
  20%,
  40%,
  60% {
    filter: brightness(2);
    background: linear-gradient(135deg, #ffe866 0%, #a259fa 85%, #7f5cff 100%);
  }
  30%,
  50%,
  70% {
    filter: brightness(1);
    background: linear-gradient(135deg, #ffe866 0%, #a259fa 85%, #7f5cff 100%);
  }
  100% {
    background: #36396a;
    border-color: #181c2b;
    box-shadow: 0 1px 0 #1117;
    opacity: 0.8;
  }
}

.tetris-row:nth-child(4) {
  animation: none;
}

.tetris-board {
  background: #232448;
  border: 3px solid #7f5cff;
  border-radius: 8px;
  box-shadow:
    0 8px 18px #1b133777,
    0 2px 0 #ffe86644 inset;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 200px;
}
.tetris-row {
  display: flex;
  gap: 2px;
  justify-content: flex-start;
}
.board-block {
  width: 16px;
  height: 16px;
  border-radius: 2px;
  background: #36396a;
  border: 1px solid #181c2b;
  box-shadow: 0 1px 0 #1117;
  opacity: 0.8;
}
.board-block.filled {
  background: linear-gradient(135deg, #ffe866 0%, #a259fa 85%, #7f5cff 100%);
  border: 1px solid #fff;
  box-shadow:
    0 1px 0 #2e2459,
    0 0 4px #ffe866cc;
  opacity: 1;
}
.tetris-row {
  opacity: 0;
  transform: translateY(-24px);
}

.tetris-btn:hover .tetris-row:nth-child(1),
.tetris-btn:focus-visible .tetris-row:nth-child(1) {
  animation: tetris-row-drop 0.32s 0.05s forwards;
}
.tetris-btn:hover .tetris-row:nth-child(2),
.tetris-btn:focus-visible .tetris-row:nth-child(2) {
  animation: tetris-row-drop 0.32s 0.2s forwards;
}
.tetris-btn:hover .tetris-row:nth-child(3),
.tetris-btn:focus-visible .tetris-row:nth-child(3) {
  animation: tetris-row-drop 0.32s 0.34s forwards;
}
.tetris-btn:hover .tetris-row:nth-child(4),
.tetris-btn:focus-visible .tetris-row:nth-child(4) {
  animation: tetris-row-drop 0.32s 0.48s forwards;
}
.tetris-btn:hover .tetris-row:nth-child(5),
.tetris-btn:focus-visible .tetris-row:nth-child(5) {
  animation: tetris-row-drop 0.32s 0.62s forwards;
}
@keyframes tetris-row-drop {
  0% {
    opacity: 0;
    transform: translateY(-24px);
  }
  60% {
    opacity: 1;
    transform: translateY(6px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}