/* =====================================================================
   🧮 Calculator App
   ===================================================================== */

#calculator { width: 250px; }
#calculator .content { padding: 15px; background: #f0f0f0; }

#calcDisplay {
  width: 100%;
  box-sizing: border-box;
  margin: 0 0 12px 0;
  padding: 10px 8px;
  font-size: 20px;
  text-align: right;
  border: 2px solid #999;
  border-radius: 4px;
  background: #fff;
  box-shadow: inset 2px 2px 4px rgba(0,0,0,0.1);
}
#calculator .content > div {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
#calculator button {
  padding: 12px 0;
  font-size: 22px;
  font-weight: bold;
  border: 2px solid #333;
  border-radius: 6px;
  background: #f8f8f8;
  cursor: pointer;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.2);
  transition: all 0.1s ease;
  font-family: "VT323", monospace;
}
#calculator button:active { transform: translate(1px,1px); box-shadow: 1px 1px 0 rgba(0,0,0,0.2); }
#calculator button[onclick*="calculate"] { background: #4a90e2; color: white; border-color: #2a6fc9; }
#calculator button[onclick*="clearCalc"] { background: #ff6b6b; color: white; border-color: #e74c3c; }