style.css

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  display: -webkit-box;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
          flex-direction: column;
  -webkit-box-pack: justify;
          justify-content: space-between;
  font-family: Arial;
  text-align: center;
  min-height: 100vh;
  min-width: 370px;
  background-image: linear-gradient(135deg,#00ccff,#9933ff 31%,#e646b6 52%,#fff9aa 77%,#00ff99,#00ccff);
  background-size: 200%;
}

header h1 {
  padding: 20px 10px;
  letter-spacing: 0.2em;
  color: white;
}

form * {
  background: rgba(256,256,256, 0.3);
  color: white;
}

form .search, form .btn {
  padding: 10px;
  border-radius: 2px;
  font-size: 16px;
  border: 1px solid white;
}

::-webkit-input-placeholder {
  color: #f5f5f5;
}

::-moz-placeholder {
  color: #f5f5f5;
}

:-ms-input-placeholder {
  color: #f5f5f5;
}

::-ms-input-placeholder {
  color: #f5f5f5;
}

::placeholder {
  color: #f5f5f5;
}

form .search {
  width: 40%;
  min-width: 200px;
  max-width: 600px; 
}
form .search:focus {
  outline: 0;
  color: #333;
  background: white;
  box-shadow: 0 0 1px 1px rgba(0,0,0,0.3);
}

form .btn {
  cursor: pointer;
  width: 60px;
}
form .btn[type="submit"] {
  -webkit-appearance: button;
}
form .btn:hover {
  color: #333;
  background: white;
}
form .clear:hover {
  background: ;
}

.giphy {
  padding: 20px 0 15px 0;
}

.giphy img {
  width: 200px;
  max-width: 800px;
  margin: auto;
  display: block;
}

.giphy img.gif {
  width: 50%;
  max-width: 600px;
  box-shadow: 0 0 2px 2px rgba(256,256,256,0.3);
}

footer {
  padding: 5px;
  font-size: 14px;
  color: white;
}

footer a {
  color: #333;
  text-decoration: none;
}
footer a:hover {
  color: white;
  text-decoration: underline;
}