:root {
  --primary: #ffffff;
  --secondary: #ffffff;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
}

body {
  font-family: "Nunito Sans", sans-serif;
  font-size: 17px;
  line-height: 24px;
  color: var(--secondary);
  height: 100%;
  margin: 0;
  padding: 0;

  background-color: #000;
  color: #fff;
}

h1,
h2,
h3 {
  line-height: 2rem;
}

a {
  text-decoration: none;
}

fieldset {
  padding: 0;
  margin: 0;
  border: 0;
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: var(--secondary);
  border-radius: 3px;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  background: var(--primary);
  height: 30px;
  width: 30px;
  border-radius: 50%;
  cursor: pointer;
  border: 4px solid var(--secondary);
}

input[type="range"]::-moz-range-thumb {
  background: var(--primary);
  border-radius: 100%;
  height: 20px;
  width: 20px;
  cursor: pointer;
  border: 4px solid var(--secondary);
}

input[type="range"]::-webkit-slider-runnable-track {
  -webkit-appearance: none;
  box-shadow: none;
  border: none;
  background: transparent;
}

button {
  background: var(--primary);
  cursor: pointer;
  border-color: #000;
  padding: 10px 30px;
  font-size: 1.3rem;
  border-width: 1px 3px 3px 1px;
  border-style: solid;
  border-radius: 3px;
}
button:hover {
  background: #93c5fd;
}

.text-center {
  text-align: center;
}

.container {
  max-width: 800px;
  margin: 45px auto 30px auto;
}
.box {
  padding: 30px 45px;
  border: 1px solid #ddd;
  border-radius: 3px;
  border: 2px solid var(--secondary);
  box-shadow: 3px 3px 0px var(--secondary);
  margin-bottom: 45px;
}

.container .title {
  margin: 15px 0 0px 0;
}

.help {
  margin-top: 5px;
}

.form {
  clear: both;
}
.form fieldset {
  font-size: 1.3rem;
  margin-bottom: 45px;
}
.form label {
  display: block;
  margin-bottom: 15px;
}
.form .value,
.help {
  float: right;
  color: #aaa;
}

.answer {
  text-align: center;
  display: none;
}
.answer h1 {
  margin: 30px 0;
  font-size: 3rem;
  line-height: 3rem;
}
.answer span {
  display: inline-block;
  background: var(--primary);
}
.answer .summary {
  font-family: monospace;
  width: 100%;
  padding: 10px;
  min-height: 200px;
}

@media (max-width: 800px) {
  .container {
    max-width: none;
    margin: 20px 30px 20px 20px;
    padding: 0;
  }
  .box {
    padding: 0;
    border: 0;
    box-shadow: none;
  }
  .help {
    float: none;
  }
  .form label {
    float: left;
    max-width: 90%;
  }
}

@media (max-width: 400px) {
  .form label {
    max-width: 70%;
  }
}

.notice {
  position: fixed;
  top: 30px;
  left: 0;
  right: 0;
  width: 250px;
  margin: auto;
  padding: 12px;
  font-size: 14px;
  font-weight: 700;
  text-align: center;
  background: #000;
  z-index: 100;
  visibility: hidden;
  border-radius: 3px;
  border: 2px solid var(--secondary);
  box-shadow: 3px 3px 0px var(--secondary);
}

.notice.visible {
  visibility: visible;
  -webkit-animation: fadein 0.5s, fadeout 0.5s 2.5s;
  animation: fadein 0.5s, fadeout 0.5s 2.5s;
  -webkit-animation-fill-mode: forwards;
  animation-fill-mode: forwards;
}

@-webkit-keyframes fadein {
  from {
    top: 0;
    opacity: 0;
  }
  to {
    top: 30px;
    opacity: 1;
  }
}

@keyframes fadein {
  from {
    top: 0;
    opacity: 0;
  }
  to {
    top: 30px;
    opacity: 1;
  }
}
@-webkit-keyframes fadeout {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}
@keyframes fadeout {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

body > div > section.box > div.answer.hide > h1 > span {
  color: #000000;
}

label {
  font-size: 18px;
}