* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}

:root {
  --calculator-background: rgb(248, 248, 248);
  --display-background: rgb(229, 229, 229);
  --button-background: rgb(251, 253, 252);
  --button-text: rgb(53, 55, 67);
  --button-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
  --primary-color: rgb(255, 127, 103);
  --text-1: rgb(176, 176, 176);
  --text-2: rgb(92, 92, 92);
}

body.dark {
  --calculator-background: rgb(62, 69, 87);
  --display-background: rgb(229, 229, 229);
  --button-background: rgb(53, 55, 67);
  --button-text: rgb(251, 253, 252);
  --primary-color: rgb(243, 134, 105);
}

body {
  width: 100%;
  display: grid;
  place-items: center;
  min-height: 100vh;
  background-image: linear-gradient(
    to right,
    rgb(80, 86, 97),
    rgb(140, 150, 159)
  );
  padding-top: 3.5rem;
}

main {
  width: 90%;
  max-width: 400px;
  padding: 2rem 0.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background-color: var(--calculator-background);
  position: relative;
}

.display {
  height: 120px;
  overflow: hidden;
  background-color: var(--display-background);
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.2) inset;
  border-radius: 0.2rem;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: flex-end;
  text-align: right;
  padding: 0.5rem;
}

.display p {
  color: var(--text-1);
}
.display p.answer {
  color: var(--text-2);
  font-weight: bold;
  font-size: 2rem;
  min-height: 40px;
  width: 120%;
  overflow-x: auto;
}
.display p.answer::-webkit-scrollbar {
  display: none;
}

.btns {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  justify-items: center;
}

.btns button {
  cursor: pointer;
  border: none;
  font-size: 1.2rem;
  height: 65px;
  width: 65px;
  border-radius: 50%;
  background-color: var(--button-background);
  color: var(--button-text);
  box-shadow: var(--button-shadow);
  transition: transform 0.5s;
}

.btns button:hover {
  transform: scale(1.1);
}

.btns button.text-primary {
  color: var(--primary-color);
}
.btns button.bg-primary {
  background-color: var(--primary-color);
  color: white;
}
.btns button.eq {
  height: 100%;
  width: 80%;
  border-radius: 2.5rem;
  grid-column: 4/5;
  grid-row: 4/6;
}

.actions {
  /* background-color: var(--primary-color); */
  display: flex;
  align-items: center;
  position: absolute;
  top: -2.2rem;
  right: 0;
  left: 0;
}

.actions button {
  background-color: transparent;
  opacity: 0.3;
  border: none;
  cursor: pointer;
  padding: 0.2rem 0.5rem;
  flex: 1;
}

.actions button.active {
  background-color: var(--calculator-background);
  color: var(--primary-color);
  opacity: 1;
  cursor: not-allowed;
}