@font-face {
  font-family: 'digital-7.regular'; 
  src: url('digital-7.regular.ttf'); 
}

body {
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  background: #F4EBE2;
  background: radial-gradient(circle,rgba(244, 235, 226, 1) 0%, rgba(218, 189, 174, 1) 100%);
}

.calculatrice {
  background-color: rgb(255, 255, 255, 0.8); 
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 10px;
  /*box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1); */
  box-shadow: rgba(50, 50, 93, 0.25) 0px 50px 100px -20px, rgba(0, 0, 0, 0.3) 0px 30px 60px -30px, rgba(10, 37, 64, 0.35) 0px -2px 6px 0px inset;
  width: 320px;
}

#display {
  background-color: #90D1B1;
  text-align: right;
  padding: 15px;
  border-radius: 10px;
  font-size: 45px;
  margin-bottom: 20px;
  min-height: 48px;
  font-family: 'digital-7.regular', 'Courier New', monospace;
  letter-spacing: 1px;
  /*box-shadow: rgba(50, 50, 93, 0.25) 0px 30px 60px -12px inset, rgba(0, 0, 0, 0.3) 0px 18px 36px -18px inset;*/
  box-shadow: rgb(204, 219, 232) 3px 3px 6px 0px inset, rgba(255, 255, 255, 0.5) -3px -3px 6px 1px inset;
}

.boutons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

button {
  width: 100%;
  height: 60px;
  font-size: 24px;
  background-color: #f0f0f0;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
  box-shadow: rgba(50, 50, 93, 0.25) 0px 50px 100px -20px, rgba(0, 0, 0, 0.3) 0px 30px 60px -30px, rgba(10, 37, 64, 0.35) 0px -1px 4px 0px inset;
}

button:hover {
  background-color: #e0e0e0;
}

button:active {
  transform: scale(0.97);
  box-shadow: inset 0px 2px 4px rgba(0, 0, 0, 0.1);
}

button.operator {
  background-color: #c9d5a0;
  color: white;
}

button.operator:hover {
  background-color: #bfd37d;
}

button.egal {
  grid-column: span 4;
  background-color: #9fd9e1;
  color: white;
}

button.egal:hover {
  background-color: #84d6e1;
}

button#clear {
  background-color: #F0A1BF;
  color: white;
}

button#clear:hover {
  background-color: #ea90b3;
}