* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 32px 16px;
  background: #eef2ff;
  color: #1e293b;
  font-family: Arial, Helvetica, sans-serif;
}

.calculator {
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
  padding: 24px;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(30, 41, 59, 0.15);
}

header,
.answer-box {
  text-align: center;
}

.number-fields {
  display: flex;
  gap: 16px;
}

.number-fields div {
  width: 50%;
}

input {
  width: 100%;
  padding: 12px;
  border: 2px solid #cbd5e1;
  border-radius: 8px;
  font-size: 16px;
}

.operations {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

button {
  padding: 10px 16px;
  border: 0;
  border-radius: 8px;
  background: #4f46e5;
  color: #ffffff;
  font-size: 16px;
  cursor: pointer;
}

button:hover {
  background: #3730a3;
}

.answer-box {
  min-height: 72px;
  margin: 24px 0;
  padding: 12px;
  background: #f8fafc;
  border-radius: 8px;
}

.clear-button {
  width: 100%;
  background: #475569;
}

.clear-button:hover {
  background: #334155;
}

@media (max-width: 480px) {
  .number-fields {
    flex-direction: column;
  }

  .number-fields div {
    width: 100%;
  }
}