hi i remove my base.css. how to get this againplz help me

* {
    box-sizing: border-box;
}
body {
    font-family: 'Nunito', sans-serif;
    line-height: 1.5;
    color: #384047;
    padding: 40px 0;
}
p {
    font-family: sans-serif;
    margin-bottom: 24px;
}
hr {
  border: 0;
  height: 0;
  border-top: 1px dotted rgba(0, 0, 0, 0.2);
  margin: 50px 0;
}
h1,
h2 {
  margin: 0 0 30px 0;
}
nav a {
    font-size: .9em;
    background: #ff784f;
    color: white;
    display: inline-block;
    text-decoration: none;
    padding: 3px 8px;
    border-radius: 3px;
}
nav a:hover {
    opacity: .75;
}

/* Main -------------------- */

#container {
    max-width: 1100px;
    margin: auto;
}
.row {
    padding-top: 40px;
}
.col {
    float: left;
    width: 32.421%;
    padding: 15px;
}

.btn {
  font-size: 0.875em;
    font-weight: 400;
  cursor: pointer; 
  color: #fff;
  padding-left: 20px;
  padding-right: 20px;
    width: 100%;
    margin: 1em 0;
    text-transform: uppercase;
    border-bottom: 3px solid rgba(0,0,0,0.05);
      background-color: #52bab3; 
}
.btn:hover { 
  opacity: .75; 
}

/* Form -------------------- */

label {
  display: block;
  margin-bottom: 0.5em; 
}
input {
  outline: 0;
    border: none;
    padding: 15px;
    border-radius: .3em;
}
input[type="text"],
input[type="email"],
input[type="password"] {
    font-size: 1em;
  color: #222;
  font-weight: 300; 
  width: 100%;
  height: auto;
  margin-bottom: 1.2em;
}

/* Float Clearfix ------------------ */

.group:after {
  content: "";
  display: table;
  clear: both;
}