body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: rgb(181, 181, 181);
  display: flex;
  justify-content: center;
  align-items: center;
}

section {
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  margin: 10px;
  background-color: rgb(255, 255, 255);
  border-radius: 15px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  width: 350px;
}
.text {
  text-align: center;
  line-height: 0.5;
  margin-bottom: 20px;
}
.text h1 {
  font-size: 30px;
  color: rgb(255, 85, 6);
  /* margin-bottom: 10px; */
}
.text p {
  font-size: 14px;
  line-height: 1.7;
  color: rgb(0, 0, 0);
}
.container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 400px;
  width: 300px;
  border: 1px solid rgb(0, 0, 0);
  padding: 20px;
  border-radius: 20px;
  gap: 20px;
}
.output {
  border: 2px solid rgb(0, 0, 0);
  border-radius: 10px;
  width: 280px;
  height: 70px;
  padding: 5px;
}
.output p {
  font-size: 28px;
  text-align: right;
  font-weight: bold;
}
.wrapper {
  display: flex;
  flex-direction: row;
  gap: 5px;
  justify-content: center;
  align-items: center;
}
.gabunganTombolOperasi {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  margin-top: 20px;
  gap: 10px;
}
.gabunganTombolOperasi button {
  width: 60px;
  height: 40px;
  font-size: 25px;
  border-radius: 5px;
  cursor: pointer;
  border: 1px solid rgb(0, 0, 0);
  color: rgb(255, 255, 255);
  background-color: rgb(255, 102, 0);
}

/* Interaction styles: hover, focus, active */
.gabunganTombolOperasi button,
.column1 button,
.column2 button,
.column3 button {
  transition: transform 120ms ease, box-shadow 120ms ease,
    background-color 120ms ease, color 120ms ease;
}

.gabunganTombolOperasi button:hover {
  background-color: rgb(230, 80, 0);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  transform: translateY(-2px);
}
.gabunganTombolOperasi button:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.18) inset;
}
.gabunganTombolOperasi button:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 140, 50, 0.25);
}
.column1 {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  margin-top: 20px;
  gap: 10px;
  width: 70px;
  flex-wrap: wrap;
  margin-bottom: -5px;
}
.column1 button {
  width: 60px; 
  height: 50px;
  font-size: 25px;
  border-radius: 5px;
  cursor: pointer;
  border: 1px solid rgb(0, 0, 0);
  color: rgb(0, 0, 0);
  background-color: rgb(255, 255, 255);
}

.column1 button:hover,
.column2 button:hover,
.column3 button:hover {
  background-color: rgb(245, 245, 245);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
  transform: translateY(-1px);
}
.column1 button:active,
.column2 button:active,
.column3 button:active {
  transform: translateY(0) scale(0.99);
}
.column1 button:focus,
.column2 button:focus,
.column3 button:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 120, 215, 0.18);
}
.column1 span button {
  margin-top: 20px;
  width: 60px;
  height: 40px;
  font-size: 25px;
  border-radius: 5px;
  cursor: pointer;
  border: 1px solid rgb(0, 0, 0);
  color: rgb(255, 255, 255);
  background-color: rgb(255, 102, 0);
}

.column2 {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  margin-top: 20px;
  gap: 10px;
  width: 70px;
  flex-wrap: wrap;
}
.column2 button {
  width: 60px;
  height: 50px;
  font-size: 25px;
  border-radius: 5px;
  cursor: pointer;
  border: 1px solid rgb(0, 0, 0);
  color: rgb(0, 0, 0);
  background-color: rgb(255, 255, 255);
}
.column3 {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  margin-top: 20px;
  gap: 10px;
  width: 70px;
  flex-wrap: wrap;
}
.column3 button {
  width: 60px;
  height: 50px;
  font-size: 25px;
  border-radius: 5px;
  cursor: pointer;
  border: 1px solid rgb(0, 0, 0);
  color: rgb(0, 0, 0);
  background-color: rgb(255, 255, 255);
}
.column3 span button {
  visibility: hidden;
  width: 60px;
  height: 50px;
  font-size: 25px;
  border-radius: 5px;
  cursor: pointer;
  border: 1px solid rgb(0, 0, 0);
  color: rgb(0, 0, 0);
  background-color: rgb(255, 255, 255);
}

/* Output focus for keyboard users */
.output {
  transition: box-shadow 120ms ease, border-color 120ms ease;
}
.output:focus {
  outline: none;
  box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.08);
  border-color: rgb(255, 140, 0);
}