@import url(https://fonts.googleapis.com/css?family=Poppins:100,100italic,200,200italic,300,300italic,regular,italic,500,500italic,600,600italic,700,700italic,800,800italic,900,900italic);

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  font-family: "poppins", sans-serif;
}
.container {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #b8e1fc;
}
.circle {
  position: absolute;
  width: 600px;
  height: 600px;
  top: 50%;
  left: 60%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: #109dff;
}
.bg-button {
  position: absolute;
  width: 50px;
  height: 50px;
  bottom: 100px;
  left: 150px;
  color: #fff;
  transform: rotate(-30deg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 16px;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}
.sm-circle {
  position: absolute;
  width: 30px;
  height: 30px;
  bottom: 200px;
  left: 100px;
  border-radius: 50%;
  background: #109dff;
}
.calculator {
  height: 700px;
  width: 350px;
  min-width: 350px;
  padding: 25px;
  background: rgba(255, 255, 255, 0.219);
  border-radius: 39px;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}
.calculator .screen {
  padding-top: 50px;
  height: 250px;
  width: 100%;
  text-align: right;
}
.calculator .screen .sub-text {
  text-align: right;
  color: #818181;
  font-size: 24px;
  margin-bottom: 8px;
  border: none;
  outline: none;
  background: transparent;
}
.calculator .screen .sub-text .operator {
  color: #109dff;
}
.calculator .screen .main-text {
  text-align: right;
  color: #424242;
  font-size: 48px;
  width: 100%;
  border: none;
  outline: none;
  background: transparent;
}
.calculator .btns-container {
  height: calc(100% - 250px);
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(4, 1fr);
}
.btns-container .btn {
  cursor: pointer;
  bottom: 100px;
  left: 150px;
  color: #19abff;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.432);
  border-radius: 16px;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  transition: background 0.3s;
  border: 1px solid rgba(255, 255, 255, 0.3);
}
.btns-container .btn:hover,
.btns-container .btn:focus {
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid #fff;
}
.btns-container .zero {
  grid-column: 1 / span 2;
}
.btns-container .equal {
  grid-column: 4;
  grid-row: 4 / span 2;
  color: #fff;
  background: #19abff;
  font-size: 24px;
  box-shadow: inset -1px 1px 3px 5px rgba(255, 255, 255, 0.329);
}
.btns-container .plus {
  grid-row: 3;
  grid-column: 4;
}
.btns-container .minus {
  grid-row: 2;
  grid-column: 4;
}
.btns-container .one {
  grid-row: 4;
  grid-column: 1;
}
.btns-container .two {
  grid-row: 4;
  grid-column: 2;
}
.btns-container .three {
  grid-row: 4;
  grid-column: 3;
}
.btns-container .four {
  grid-row: 3;
  grid-column: 1;
}
.btns-container .five {
  grid-row: 3;
  grid-column: 2;
}
.btns-container .six {
  grid-row: 3;
  grid-column: 3;
}