.quantum-games {
  margin: 3rem 0 2rem;
}

.quantum-games__heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 1.25rem;
}

.quantum-games__heading h2 {
  margin: 0;
}

.quantum-games__eyebrow {
  margin: 0 0 0.35rem;
  color: #5b57d1;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.quantum-games__intro {
  max-width: 32rem;
  margin: 0;
  color: #687078;
  font-size: 0.9rem;
  line-height: 1.55;
}

.quantum-games__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 315px), 1fr));
  gap: 1.25rem;
}

.quantum-game-card {
  position: relative;
  overflow: hidden;
  padding: 1.35rem;
  border: 1px solid rgba(68, 76, 231, 0.16);
  border-radius: 18px;
  background:
    radial-gradient(circle at 100% 0%, rgba(91, 87, 209, 0.12), transparent 34%),
    linear-gradient(145deg, #ffffff 0%, #fbfbff 100%);
  box-shadow: 0 14px 36px rgba(30, 38, 70, 0.08);
}

.quantum-game-card__topline {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.quantum-game-card__tag {
  display: inline-block;
  margin-bottom: 0.4rem;
  color: #5b57d1;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.quantum-game-card h3 {
  margin: 0;
  font-size: 1.35rem;
}

.quantum-game-card__badge {
  display: inline-grid;
  min-width: 2.6rem;
  height: 2.1rem;
  place-items: center;
  border: 1px solid rgba(91, 87, 209, 0.2);
  border-radius: 999px;
  background: rgba(91, 87, 209, 0.08);
  color: #4743ba;
  font-size: 0.75rem;
  font-weight: 800;
}

.quantum-game-card__description {
  margin: 0.8rem 0 1.1rem;
  color: #555e68;
  font-size: 0.88rem;
  line-height: 1.55;
}

.quantum-sudoku__workspace {
  display: grid;
  grid-template-columns: minmax(180px, 235px) 1fr;
  gap: 1rem;
  align-items: stretch;
}

.quantum-sudoku__board-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
}

.quantum-sudoku__board {
  display: grid;
  width: min(100%, 235px);
  aspect-ratio: 1;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 1fr);
  border: 2px solid #2e3440;
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
}

.quantum-sudoku__cell {
  display: grid;
  place-items: center;
  border-right: 1px solid #cfd3da;
  border-bottom: 1px solid #cfd3da;
  background: #fff;
  color: #272d35;
  font-size: clamp(1rem, 2.7vw, 1.35rem);
  font-weight: 650;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.quantum-sudoku__cell:nth-child(4n) {
  border-right: 0;
}

.quantum-sudoku__cell:nth-child(n+13) {
  border-bottom: 0;
}

.quantum-sudoku__cell:nth-child(4n+2) {
  border-right: 2px solid #2e3440;
}

.quantum-sudoku__cell:nth-child(n+5):nth-child(-n+8) {
  border-bottom: 2px solid #2e3440;
}

.quantum-sudoku__cell--clue {
  background: #f4f5f8;
  color: #20252b;
}

.quantum-sudoku__cell--solved {
  background: #eeedff;
  color: #4541bd;
  animation: quantum-cell-pop 260ms ease both;
}

@keyframes quantum-cell-pop {
  0% { transform: scale(0.86); opacity: 0.3; }
  100% { transform: scale(1); opacity: 1; }
}

.quantum-sudoku__panel {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 0.85rem;
  border: 1px solid #eceef3;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
}

.quantum-sudoku__metric {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid #eceef3;
  color: #737b84;
  font-size: 0.72rem;
}

.quantum-sudoku__metric strong {
  color: #303741;
  font-size: 0.9rem;
}

.quantum-sudoku__status {
  margin: auto 0 0;
  color: #59616b;
  font-size: 0.75rem;
  line-height: 1.45;
}

.quantum-game-card__actions {
  display: flex;
  gap: 0.65rem;
  margin-top: 1rem;
}

.quantum-game-button {
  appearance: none;
  flex: 1;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 0.68rem 0.9rem;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  transition: transform 150ms ease, box-shadow 150ms ease, opacity 150ms ease;
}

.quantum-game-button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.quantum-game-button:disabled {
  cursor: wait;
  opacity: 0.58;
}

.quantum-game-button--primary {
  background: #5753cf;
  color: #fff;
  box-shadow: 0 7px 18px rgba(87, 83, 207, 0.2);
}

.quantum-game-button--secondary {
  border-color: #d9dce4;
  background: #fff;
  color: #343b44;
}

.quantum-game-card__note {
  margin: 0.8rem 0 0;
  color: #858b92;
  font-size: 0.66rem;
  line-height: 1.45;
}

@media (max-width: 720px) {
  .quantum-games__heading {
    display: block;
  }

  .quantum-games__intro {
    margin-top: 0.6rem;
  }

  .quantum-sudoku__workspace {
    grid-template-columns: 1fr;
  }

  .quantum-sudoku__board {
    width: min(100%, 270px);
  }
}