html, body {
  align-items: center;
  background: #f2f4f8;
  border: 0;
  display: flex;
  font-family: Helvetica, Arial, sans-serif;
  font-size: 16px;
  height: 100%;
  justify-content: center;
  margin: 0;
  padding: 0;
}

form {
  --background: white;
  --border: rgba(0, 0, 0, 0.125);
  --borderDark: rgba(0, 0, 0, 0.25);
  --borderDarker: rgba(0, 0, 0, 0.5);
  --bgColorH: 0;
  --bgColorS: 0%;
  --bgColorL: 98%;
  --fgColorH: 210;
  --fgColorS: 50%;
  --fgColorL: 38%;
  --shadeDark: 0.3;
  --shadeLight: 0.7;
  --shadeNormal: 0.5;
  --borderRadius: 0.125rem;
  --highlight: #306090;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--borderRadius);
  box-shadow: 0 1rem 1rem -0.75rem var(--border);
  display: flex;
  flex-direction: column;
  padding: 1rem;
  position: relative;
  overflow: hidden;
}

form .email, form .email a {
  color: hsl(var(--fgColorH), var(--fgColorS), var(--fgColorL));
  font-size: 0.825rem;
  order: 4;
  text-align: center;
  margin-top: 0.25rem;
  outline: 1px dashed transparent;
  outline-offset: 2px;
  display: inline;
}

form a:hover {
  color: hsl(var(--fgColorH), var(--fgColorS), calc(var(--fgColorL) * 0.85));
  transition: color 0.25s;
}

form a:focus {
  color: hsl(var(--fgColorH), var(--fgColorS), calc(var(--fgColorL) * 0.85));
  outline: 1px dashed hsl(var(--fgColorH), calc(var(--fgColorS) * 2), calc(var(--fgColorL) * 1.15));
  outline-offset: 2px;
}

form > div {
  order: 2;
}

label {
  display: flex;
  flex-direction: column;
}

.label-show-password {
  order: 3;
}

label > span {
  color: var(--borderDarker);
  display: block;
  font-size: 0.825rem;
  margin-top: 0.625rem;
  order: 1;
  transition: all 0.25s;
}

label > span.required::after {
  content: "*";
  color: #dd6666;
  margin-left: 0.125rem;
}

label input {
  order: 2;
  outline: none;
}

label input::placeholder {
  color: var(--borderDark);
}

/* trick from https://css-tricks.com/snippets/css/password-input-bullet-alternatives/ */
label input[name="password"] {
  -webkit-text-security: disc;
}

input[name="show-password"]:checked ~ div label input[name="password"] {
  -webkit-text-security: none;
}

label:hover span {
  color: hsl(var(--fgColorH), var(--fgColorS), var(--fgColorL));
}

input[type="checkbox"] + div label:hover span::before,
label:hover input.text {
  border-color: hsl(var(--fgColorH), var(--fgColorS), var(--fgColorL));
}

label input.text:focus,
label input.text:active {
  border-color:  hsl(var(--fgColorH), calc(var(--fgColorS) * 2), calc(var(--fgColorL) * 1.15));
  box-shadow: 0 1px  hsl(var(--fgColorH), calc(var(--fgColorS) * 2), calc(var(--fgColorL) * 1.15));
}

input.text:focus + span,
input.text:active + span {
  color:  hsl(var(--fgColorH), calc(var(--fgColorS) * 2), calc(var(--fgColorL) * 1.15));
}

input {
  border: 1px solid var(--border);
  border-radius: var(--borderRadius);
  box-sizing: border-box;
  font-size: 1rem;
  height: 2.25rem;
  line-height: 1.25rem;
  margin-top: 0.25rem;
  order: 2;
  padding: 0.25rem 0.5rem;
  width: 15rem;
  transition: all 0.25s;
}

input[type="submit"] {
  color: hsl(var(--bgColorH), var(--bgColorS), var(--bgColorL));
  background: hsl(var(--fgColorH), var(--fgColorS), var(--fgColorL));
  font-size: 0.75rem;
  font-weight: bold;
  margin-top: 0.625rem;
  order: 4;
  outline: 1px dashed transparent;
  outline-offset: 2px;
  padding-left: 0;
  text-transform: uppercase;
}

input[type="checkbox"]:focus + label span::before,
input[type="submit"]:focus {
  outline: 1px dashed hsl(var(--fgColorH), calc(var(--fgColorS) * 2), calc(var(--fgColorL) * 1.15));
  outline-offset: 2px;
}

input[type="submit"]:focus {
  background: hsl(var(--fgColorH), var(--fgColorS), calc(var(--fgColorL) * 0.85));
}

input[type="submit"]:hover {
  background: hsl(var(--fgColorH), var(--fgColorS), calc(var(--fgColorL) * 0.85));
}

input[type="submit"]:active {
  background: hsl(var(--fgColorH), calc(var(--fgColorS) * 2), calc(var(--fgColorL) * 1.15));
  transition: all 0.125s;
}

/** Checkbox styling */
.a11y-hidden {
  position: absolute;
  top: -1000em;
  left: -1000em;
}

input[type="checkbox"] + label span {
  padding-left: 1.25rem;
  position: relative;
}

input[type="checkbox"] + label span::before {
  content: "";
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 0.75rem;
  height: 0.75rem;
  border: 1px solid var(--borderDark);
  border-radius: var(--borderRadius);
  transition: all 0.25s;
  outline:1px dashed transparent;
  outline-offset: 2px;
}

input[type="checkbox"]:checked + label span::after {
  content: "";
  display: block;
  position: absolute;
  top: 0.1875rem;
  left: 0.1875rem;
  width: 0.375rem;
  height: 0.375rem;
  border: 1px solid var(--borderDark);
  border-radius: var(--borderRadius);
  transition: all 0.25s;
  outline:1px dashed transparent;
  outline-offset: 2px;
  background: hsl(var(--fgColorH), var(--fgColorS), var(--fgColorL));
}