input[type=text], select, textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-sizing: border-box;
  margin-top: 6px;
  margin-bottom: 16px;
  resize: vertical;
}

input[type=submit] {
  background-color: #4CAF50;
  color: white;
  padding: 12px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

input[type=submit]:hover {
  background-color: #45a049;
}

#center {
    margin-left: auto;
    margin-right:auto;
}

#slider {
    /*width:720px;*/
    width: 225px;
    height: 400px;
    overflow: hidden;
}

#slider .slides {
    display: block;
    width: 2000px;
    /*width: 6000px;*/
    height: 400px;
    margin: 0;
    padding: 0;
}

#slider .slide {
    float: left;
    list-style-type: none;
    /*width: 720px;*/
    width: 225px;
    height: 400px;
}

/* helper css, since we don't have images */
.slide1 {background: red;}
.slide2 {background: blue;}
.slide3 {background: green;}
.slide4 {background: purple;}
.slide5 {background: pink;}