:root {
    --main-color: #005DD9;
  }
  
  * {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
  }
  
  body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
  }
  
  .container {
    width: 306px;
    padding: 20px 10px;
    border-radius: 10px;
    box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.2),
      -5px -5px 10px rgba(0, 0, 0, 0.2)
  }
  
  .output {
    border: solid 2px var(--main-color);
    height: 60px;
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 20px;
  }
  
  .output input {
    height: 100%;
    width: 100%;
    border: none;
    outline: none;
    font-size: 50px;
    text-align: end;
    padding-right: 20px;
    color: var(--main-color);
  }
  
  .output input::placeholder {
    color: var(--main-color);
  }
  
  .btns {
    display: grid;
    grid-template-columns: repeat(4, 60px);
    gap: 10px 15px;
  }
  
  .btns button {
    border: none;
    outline: none;
    height: 60px;
    border-radius: 50%;
    font-size: 25px;
    color: var(--main-color);
    background-color: #fff;
    box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.2)
  }
  
  .btns button.sp {
    background-color: var(--main-color);
    color: #fff;
  }
  
  .btns button.equal {
    width: 135px;
    border-radius: 22px;
  }
  
  .appmenu {
    position: absolute;
    top: 10px;
    left: 10px;
  }
  
  .icon {
    display: flex;
    flex-direction: column;
    width: 25px;
    gap: 5px;
    margin-bottom: 10px;
    transition: 0.3s;
  }
  
  .icon span {
    background-color: var(--main-color);
    height: 5px;
    width: 100%;
    border-radius: 20px;
    transition: 0.3s;
  }
  
  .menu {
    padding: 10px;
    border-radius: 10px;
    background-color: #fff;
    display: flex;
    gap: 10px;
    transform: scale(0);
    transform-origin: top left;
    transition: 0.3s;
    box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.2);
  }
  
  .menu.open {
    transform: scale(1);
  }
  
  .menu div {
    height: 40px;
    width: 40px;
    border-radius: 50%;
    border: solid 2px #818181;
  }
  
  .menu div:nth-child(1) {
    background-color: #005DD9;
  }
  
  .menu div:nth-child(2) {
    background-color: #DF8F12;
  }
  
  .menu div:nth-child(3) {
    background-color: #E23434;
  }
  
  .menu div:nth-child(4) {
    background-color: #622AEB;
  }
  
  .menu div:nth-child(5) {
    background-color: #FF20A1;
  }
  
  body.blue {
    --main-color: #005DD9;
  }
  
  body.orange {
    --main-color: #DF8F12;
  }
  
  body.red {
    --main-color: #E23434;
  }
  
  body.purple {
    --main-color: #622AEB
  }
  
  body.pink {
    --main-color: #FF20A1;
  }