* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Inter", sans-serif;
  min-height: 100vh;
  background: #7299be;
  display: flex;
  justify-content: center;
  align-items: center;
}

.calculadora {
  background: white;
  width: 320px;
  padding: 24px;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,.08);
}

.calculadora h1 {
  text-align: center;
  margin-bottom: 16px;
  font-weight: 500;
  color: #333;
}

#display {
  width: 100%;
  padding: 16px;
  font-size: 28px;
  border-radius: 10px;
  border: 1px solid #ddd;
  margin-bottom: 16px;
  text-align: right;
  outline: none;
}

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

button {
  padding: 16px 0;
  font-size: 16px;
  border: none;
  border-radius: 10px;
  background: #f1f3f7;
  cursor: pointer;
  transition: .2s;
}

button:hover {
  background: #e3e6ee;
}

button:active {
  transform: scale(.97);
}

.igual {
  background: #2563eb;
  color: white;
  grid-row: span 2;
}

.igual:hover {
  background: #1e4ed8;
}


.zero {
  grid-column: span 2;
}


@media (max-width: 350px) {
  .calculadora {
    width: 90%;
  }
}