* {
    font-family: 'Open Sans', 'Helvetica', 'Arial', sans-serif;
    box-sizing: border-box;
  }
  
  h1,
  h2,
  h3,
  h4 {
    font-weight: 900;
  }
  
  body {
    background: rgba(252, 208, 122, 1);
    font-weight: 300;
    margin: 0;
  }
  
  .wrapper {
    width: 100%;
  }
  
  .calc {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
  }
  
  .top {
    max-width: 400px;
    width: 100%;
    background: #FFF9F9;
    color: #444;
    border-radius: 10px 10px 0 0;
  }
  
  .result {
    box-sizing: border-box;
    width: 100%;
    height: 30px;
    font-size: 16px;
    margin: 0;
    padding: 7px 10px 0px 10px;
    text-align: left;
    opacity: 0.6;
    overflow: hidden;
  }
  
  .screen {
    width: 100%;
    height: 50px;
    border: 0;
    font-size: 30px;
    padding: 0px 20px 5px 5px;
    text-align: right;
    display: flex;
    align-items: baseline;
    justify-content: flex-end;
    overflow: hidden;
  }
  
  .hints {
    opacity: 0.3;
  }
  
  .keyboard {
    max-width: 400px;
    width: 100%;
    box-shadow: inset 10px -88px 160px 23px rgba(0, 0, 0, 0.8), 5px 35px 191px -43px rgba(255, 0, 255, 0.5);
    margin-bottom: 50px;
  }
  
  .crow {
    display: flex;
    flex-direction: row;
    align-items: stretch;
    ;
    justify-content: space-around;
    ;
    width: 100%;
    min-height: 50px;
    margin: auto;
  }
  
  .crow:last-child {
    border-radius: 0px 0px 10px 10px;
  }
  
  .cb {
    box-sizing: border-box;
    width: 100%;
    text-align: center;
    padding: 5px;
    background: rgba(255, 228, 240, 1);
    color: #444;
    cursor: pointer;
    outline: 1px solid rgba(136, 14, 79, 0.1);
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    box-shadow: none;
    transition: all 0.2s;
    user-select: none;
  }
  
  .cb:hover {
    box-shadow: 10px 10px 18px -6px rgba(233, 30, 99, 0.5);
    z-index: 1000;
  }
  
  .cb:active {
    box-shadow: inset 10px 10px 18px -6px rgba(233, 30, 99, 0.5);
  }
  
  .screentext {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
  }
  
  .animated {
    position: relative;
    top: 0;
    animation: movetext1 .2s 1;
  }
  
  @keyframes movetext1 {
    0% {
      top: 100px;
    }
    100% {
      top: 0px;
    }
  }
  
  sup {
    vertical-align: text-top;
    font-size: 0.5em;
  }
  
  .inv {
    display: none;
  }
  
  .lighter {
    background-color: rgba(255, 235, 238, 1);
    font-size: 1.2em;
  }
  
  .operands {
    background-color: rgba(255, 155, 160, 1);
    color: #eee;
    font-size: 1.6em;
  }
  
  .enter {
    background-color: rgba(254, 111, 118, 1);
    color: #eee;
    font-size: 2em;
  }