* {
  box-sizing: border-box;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: system-ui, sans-serif;
  height: 100vh;
  overflow: hidden;

  #calculator {
    padding: 1.5rem;
    width: 300px;
    height: 400px;
    gap: 2rem;
    display: flex;
    flex-direction: column;
    border-radius: 0.5rem;
    border: 1px solid oklch(0% 0 0);
    background-color: oklch(23.613% 0.00152 16.294);

    .row {
      display: flex;
      justify-content: space-between;

      &:last-child::before {
        width: 2.5rem;
        height: 2.5rem;
      }

      .button {
        padding: 0;
        width: 2.5rem;
        height: 2.5rem;
        cursor: pointer;
        font-size: 1.5rem;
        display: flex;
        align-items: center;
        justify-content: center;
        color: oklch(100% 0.00011 271.152);
        background-color: oklch(63.208% 0.25375 22.294);
        border-radius: 4px;
        border: 2px solid oklch(65.612% 0.23005 26.313);
      }
    }
  }

  #display {
    width: 100%;
    height: 3.125rem;
    font-size: 1.5rem;
    padding: 0.75rem;
    display: flex;
    justify-content: flex-end;
    color: oklch(100% 0.00011 271.152);
    border-radius: 4px;
    background-color: oklch(42.295% 0.04178 248.876);
  }
}