@import url(https://fonts.googleapis.com/css?family=Montserrat);
body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: Montserrat;
  background: #313E50;
}

h1 {
  color: #282936;
}

.text_input_container {
  position: relative;
  margin-top: 50px;
  margin-left: 50px;
}
.text_input_container input[type=text] {
  display: inline-block;
  width: 500px;
  height: 40px;
  box-sizing: border-box;
  outline: none;
  border: 1px solid lightgray;
  border-radius: 3px;
  padding: 10px 10px 10px 180px;
  transition: all 0.1s ease-out;
}
.text_input_container input[type=text] + label {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  height: 40px;
  line-height: 40px;
  color: white;
  border-radius: 3px 0 0 3px;
  padding: 0 20px;
  background: #E03616;
  transform: translateZ(0) translateX(0);
  transition: all 0.3s ease-in;
  transition-delay: 0.2s;
}
.text_input_container input[type=text]:focus + label {
  transform: translateY(-120%) translateX(0%);
  border-radius: 3px;
  transition: all 0.1s ease-out;
}
.text_input_container input[type=text]:focus {
  padding: 10px;
  transition: all 0.3s ease-out;
  transition-delay: 0.2s;
}

#button_container {
  display: block;
  text-align: center;
  margin-top: 50px;
}

button {
  position: relative;
  display: inline-block;
  cursor: pointer;
  outline: none;
  border: 0;
  vertical-align: middle;
  text-decoration: none;
  background: transparent;
  padding: 0;
  font-size: inherit;
  font-family: inherit;
}
button.Run {
  width: 12rem;
  height: auto;
}
button.Run .circle {
  transition: all 0.45s cubic-bezier(0.65, 0, 0.076, 1);
  position: relative;
  display: block;
  margin: 0;
  width: 3rem;
  height: 3rem;
  background: #282936;
  border-radius: 1.625rem;
}
button.Run .circle .icon {
  transition: all 0.45s cubic-bezier(0.65, 0, 0.076, 1);
  position: absolute;
  top: 0;
  bottom: 0;
  margin: auto;
  background: #fff;
}
button.Run .circle .icon.arrow {
  transition: all 0.45s cubic-bezier(0.65, 0, 0.076, 1);
  left: 0.625rem;
  width: 1.125rem;
  height: 0.125rem;
  background: none;
}
button.Run .circle .icon.arrow::before {
  position: absolute;
  content: "";
  top: -0.25rem;
  right: 0.0625rem;
  width: 0.625rem;
  height: 0.625rem;
  border-top: 0.125rem solid #fff;
  border-right: 0.125rem solid #fff;
  transform: rotate(45deg);
}
button.Run .button_text {
  transition: all 0.45s cubic-bezier(0.65, 0, 0.076, 1);
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 0.75rem 0;
  margin-left: auto;
  margin-right: auto;
  color: #282936;
  font-weight: 700;
  line-height: 1.6;
  text-align: center;
  text-transform: uppercase;
}
button:hover .circle {
  width: 100%;
}
button:hover .circle .icon.arrow {
  background: #fff;
  transform: translate(1rem, 0);
}
button:hover .button_text {
  color: #fff;
}

.prime {
  margin-top: 100px;
  text-align: center;
  font-size: 100px;
}

.run_time {
  margin-top: 100px;
  text-align: center;
}