todo-app/css/style.css

@import url('https://fonts.googleapis.com/css?family=Roboto:400,500,700&subset=latin-ext');

body {
    background: #edf0f1;
    padding: 80px 0 0 0;
  }
  
body, input, button {
    font-family: 'Roboto', sans-serif;
}

.noFill {
    fill: none;
  }

h2 {
    color: blue;
}
header{
    width: 100%;
    height: 80px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 5;
    padding: 15px;
    background: #25b99a;
    box-shadow: 0 2px 4px rgba(44, 62, 80, 0.15);
    border-bottom-left-radius: 10px;
    border-bottom-right-radius: 10px;
}

header input{
    width: 100%;
    height: 50px;
    color: #fff;
    font-size: 15px;
    font-weight: 400;
    text-indent: 18px;
    padding: 0 60px 0 0; 
    float: left;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 5px 25px 25px 5px;
    border: 0;
    box-shadow: none;
    outline: none;
}

header input::-webkit-input-placeholder {
    color: rgba(255, 255, 255, 0.75);
  }

header button{
    width: 50px;
    height: 50px;
    position: absolute;
    top: 15px;
    right: 15px;
    z-index: 2;
    border-radius: 25px;
    background: #fff;
    box-shadow: none;
    outline: none;
    border: none;
    cursor: pointer;

    -webkit-appearance: none;
    -moz-appearance: none;
}

header button svg {
    width: 16px;
    height: 16px;
  
    position: absolute;
    top: 50%;
    left: 50%;
  
    margin: -8px 0 0 -8px;

    fill: #25b99a;
  }

  .container{
      width: 100%;
      padding: 15px;
      float: left;
  }

  ul.todo{
      width: 100%;
      float: left;
  }

  ul.todo li{
    width: 100%;
    min-height: 50px;
    float: left;
    background: #fff;
    font-size: 14px;
    font-weight: 500;
    color: #444;
    line-height: 22px;
    border-radius: 5px;
    box-shadow: 0px 1px 2px rgba(44, 62, 80, 0.10); 
    margin-bottom: 10px;
    position: relative;
    padding: 14px 100px 14px 14px; 
}

ul.todo li .buttons{
    width: 100px;
    height: 50px;
    position: absolute;
    top: 0;
    right: 0;
}

ul.todo li .buttons button{
    width: 50px;
    height: 50px;
    float: left;
    background: none;
    border: 0;
    box-shadow: none;
    outline: none;
    position: relative; 
    cursor: pointer;

    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

ul.todo li .buttons button:last-of-type:before{
    content: '';
    width: 1px;
    height: 30px;
    background: #edf0f1;  
    position: absolute;
    top: 10px;
    left: 0;
}

ul.todo li .buttons button svg{
    width: 22px;
    height: 22px;
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -11px 0 0 -11px;
}

ul.todo li .buttons button.complete svg{
    border-radius: 11px;
    border: 1.5px solid #25b99a;

    transition: 0.2s ease;
}

ul.todo#completed li .buttons button.complete svg{
    background: #25b99a;
    border: 0;
}

ul.todo:not(#completed) li .buttons button.complete:hover svg{
    background: rgba(37, 185, 154, 0.75);    
}

ul.todo:not(#completed) li .buttons button.complete:hover svg .fill{    
    fill: #fff;    
}

ul.todo#completed li .buttons button.complete svg .fill{
    fill: #fff;
}

ul.todo li .buttons button svg .fill{
    transition: fill 0.2s ease;
}

ul.todo li .buttons button.remove svg .fill{
    fill: #c0cecb;
}

ul.todo li .buttons button.remove:hover svg .fill{
    fill: #e85656;
}

ul.todo li .buttons button.complete svg .fill{
    fill: #25b99a;
}

ul.todo#completed:not(:empty){
    position: relative;
    padding: 60px 0 0 0;
}

ul.todo#completed:not(:empty):before{
    content: '';
    width: 150px;
    height: 1px;
    background: #d8e5e0;
    position: absolute;
    top: 30px;
    left: 50%;
    margin: 0 0 0 -75px;
}