:root {
  --primary-dark: #333333;
  --primary-light: #FFFFFF;
  --secondary-dark: #AAAAAA;
  --primary-shadow: #EEEEEE55;
  --primary-accent: #4CAF50;
	--secondary-accent: #C43535;
	--primary-margin: 1.6rem;
	--checkbox-size: 2rem;
}

html{
  background: var(--primary-dark);
  font-family: 'Roboto', sans-serif;
  color: var(--primary-light);
  margin: var(--primary-margin);
  font-size: 62.5%;
}

body {
  font-size: 1.8rem;
  max-width: 140rem;
  margin: auto;
}

header summary,
h1 {
  text-align: center;
}

h1 {
  font-size: 3.6rem;
}

p,
footer {
  text-align: center;
  font-style: italic;
}

footer p {
  font-size: 1.2rem;
}

a {
  color: var(--secondary-dark);
  display: inline;
}

input[type=submit],
input[type=reset] {
  border: none;
  color: white;
  padding: 1.6rem 3.2rem;
  text-decoration: none;
  text-transform: uppercase;
  font-size: 1.6rem;
  font-weight: bold;
  margin: 0.4rem 0.2rem;
  cursor: pointer;
}
input[type=submit]:hover,
input[type=reset]:hover {
  box-shadow: 0.3rem 0.3rem 0.3rem var(--primary-shadow);
}
input[type=submit]{
  background-color: var(--primary-accent);
}
input[type=reset]{
  background-color: var(--secondary-accent);
}

label {
  text-align: left;
  font-size: 1.8rem;
  width: 100%;
  margin-top: 0.7rem;
  display: inline-block;
}

label > input[type=checkbox] {
  width: var(--checkbox-size);
  height: var(--checkbox-size);
}

select,
input[type="text"],
input[type="url"],
input[type="tel"],
input[type="datetime-local"],
input[type="number"],
input[type="email"],
input[type="password"],
input[type="range"],
textarea {
  display: inline-block;
  width: 100%;
  font-size: 1.8rem;
  padding: 1.2rem 2rem;
  margin: 0.8rem 0;
  box-sizing: border-box;
  resize: vertical;
}

form {
  text-align: end;
	margin-bottom: 1rem;
}

form details summary {
  text-align: start;
  font-style: italic;
  font-weight: bold;
  cursor: pointer;
}

form details,
fieldset {
  margin: var(--primary-margin) 0;
}
form > fieldset:first-of-type {
  display: block;
}

form > fieldset,
form > fieldset > fieldset {
  display: none;
}

form p {
  text-align: start;
}

fieldset > fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

fieldset > fieldset > select {
  text-transform: uppercase;
}

legend {
  padding: 0 0.5rem;
  text-align: center;
}

legend:first-letter,
input:first-letter,
label:first-letter {
  text-transform: uppercase;
}

output {
	float: right;
	color: var(--primary-accent);
}

datalist {
  width: 100%;
  display: flex;
  justify-content: space-between;
}

datalist > option {
  display: inline-block;
  color: gray;
}

#fs_qrcode_options span select {
  float: right;
  width: fit-content;
}

#fs_qrcode_options > span label {
  margin: 1.8rem auto 0 auto;
  width: fit-content;
}

#fs_qrcode_options span :not(.switch):not(a) {
  box-sizing: border-box;
  display: inline-block;
}

#fs_qrcode_options > span:first-of-type {
  width: 100%;
  display: inline-block;
}

#fs_qrcode_options {
	text-align: start;
}
#fs_qrcode_options > *:not(summary) {
  margin-left: var(--primary-margin);
  margin-right: var(--primary-margin);
	max-width: calc(100% - 30px);
  width: fit-content;
}
#fs_qrcode_options label {
  font-weight: bold;
  margin: 0 var(--primary-margin);

}
#fs_qrcode_options > input[type="range"] {
  margin: 0 var(--primary-margin);
	width: 100%;
}

#fs_qrcode_options label > a {
	font-size: 1rem;
}

#fs_qrcode_options > label:first-of-type,
#fs_qrcode_options datalist {
	width: 100%;
}

.switch {
  position: relative;
  display: inline-block;
  width: 5.2rem;
  height: 2.6rem;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--secondary-accent);
  -webkit-transition: .1s;
  transition: .1s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 1.8rem;
  width: 1.8rem;
  left: 0.4rem;
  bottom: 0.4rem;
  background-color: var(--primary-light);
  -webkit-transition: .1s;
  transition: .1s;
}
input:focus + .slider {
  box-shadow: 0 0 0.1rem var(--primary-shadow);
}

input:checked + .slider {
  background-color: var(--primary-accent);
}

input:checked+ .slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}
.slider.round {
  border-radius: 3.4rem;
}
.slider.round:before {
  border-radius: 50%;
}

#qrcode_display {
  margin: auto;
  background-color: var(--primary-light);
	width: 42rem;
  height: 100%;
}

#qrcode_display svg {
  display: block;
  width: 100%;
  height: 100%;
}

@media only screen and (max-widt: 600px) {
  body {
    font-size: 2rem;
  }
}