/* ### CSS RESET ### */

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

img {
  display: block;
  max-width: 100%;
}

/* ### GENERAL STYLING ### */

h1 {
  margin-top: 4rem;
  text-align: center;
}

button img {
  margin-inline: auto;
}

/* ## CALCULATOR ## */

.calculator {
  margin-top: 8rem;
  margin-inline: auto;
  width: 320px;
  border-radius: 1rem;
  padding: 1.5rem;
  font-size: 1.5rem;
  background-color: #4a6e8a1b;
}

/* ## DISPLAY ## */

.calculator__display {
  height: 100px;
  border: 2px solid #4ba2e6;
  border-radius: 1rem;
  margin-bottom: 1.5rem;
  font-size: 2.125rem;
  display: flex;
  justify-content: flex-end;
  align-items: flex-end;
  padding: 0.3rem 0.6rem;
}

/* ## PANEL ## */

.calculator__panel {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn {
  font-size: 1rem;
  border: none;
  padding: 0.5rem 1.6rem;
  cursor: pointer;
  border-radius: 200px;
  background-color: #e64ba2;
  color: white;
  flex-grow: 1;
  width: 45px;
  flex-shrink: 0;
}

.btn.btn-side {
  background-color: #4be68f;
  color: #30423a;
}