.math-puzzle-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 56px;
}

.math-puzzle-shell {
  max-width: 760px;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}

.game-toolbar,
.action-row,
.number-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.game-toolbar {
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.puzzle-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  color: #475569;
  font-size: 0.98rem;
}

.meta-pill {
  padding: 8px 12px;
  border-radius: 999px;
  background: #f8f5ef;
  border: 1px solid #ece4d7;
}

.game-instructions {
  margin: 0 0 10px;
  color: #1e293b;
  font-size: 1rem;
  line-height: 1.5;
}

.board-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  margin: 20px 0 24px;
  overflow-x: auto;
}

.crossmath-grid {
  display: grid;
  grid-template-columns: repeat(5, 72px);
  grid-auto-rows: 72px;
  gap: 10px;
  margin: 0 auto;
}

.cell,
.bank-number {
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  box-sizing: border-box;
}

.cell {
  font-size: 1.4rem;
  background: #f1f5f9;
  border: 2px solid #cbd5e1;
  color: #1e293b;
}

.cell.empty {
  background: transparent;
  border-color: transparent;
}

.cell.operator,
.cell.equals {
  background: #e2e8f0;
  color: #334155;
  font-weight: 800;
  font-size: 1.8rem;
}

.cell.blank {
  background: #ffffff;
  border: 2px dashed #94a3b8;
  cursor: pointer;
}

.cell.blank:hover {
  background: #f8fafc;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.cell.blank.selected {
  outline: 3px solid #3b82f6;
  outline-offset: 0;
  background: #eff6ff;
  border-color: #60a5fa;
}

.cell.blank.filled {
  background: #f8fafc;
  border-style: solid;
  border-color: #93c5fd;
}

.cell.blank.correct {
  background: #ecfdf5;
  border-style: solid;
  border-color: #34d399;
}

.cell.blank.wrong {
  background: #fef2f2;
  border-style: solid;
  border-color: #f87171;
}

.bank-card {
  background: #f8fbfc;
  border: 1px solid #dbe7eb;
  border-radius: 20px;
  padding: 16px;
  margin-top: 8px;
}

.bank-title {
  margin: 0 0 12px;
  font-size: 1.1rem;
  color: #1e293b;
}

.number-bank {
  gap: 14px;
}

.bank-number {
  min-width: 64px;
  min-height: 64px;
  font-size: 1.4rem;
  background: #eef2ff;
  border: 2px solid #c7d2fe;
  color: #3730a3;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.bank-number:hover {
  transform: translateY(-1px);
}

.bank-number.selected {
  border-color: #3b82f6;
  background: #dbeafe;
}

.bank-number.used {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
}

.result-message {
  margin-top: 16px;
  padding: 14px;
  border-radius: 16px;
  display: none;
}

.result-message.show {
  display: block;
}

.result-message.success {
  background: #edf9ef;
  color: #1f6b2a;
}

.result-message.error {
  background: #fff3f3;
  color: #9a2f2f;
}

.result-message.info {
  background: #f3f8ff;
  color: #2556a3;
}

@media (max-width: 768px) {
  .math-puzzle-page {
    padding: 18px 14px 40px;
  }

  .math-puzzle-shell {
    padding: 18px;
    border-radius: 20px;
  }

  .game-toolbar {
    align-items: flex-start;
  }

  .crossmath-grid {
    grid-template-columns: repeat(5, 58px);
    grid-auto-rows: 58px;
    gap: 8px;
  }

  .cell {
    font-size: 1.1rem;
    border-radius: 15px;
  }

  .cell.operator,
  .cell.equals {
    font-size: 1.45rem;
  }

  .bank-number {
    min-width: 56px;
    min-height: 56px;
    font-size: 1.2rem;
    border-radius: 12px;
  }
}