:root {
  font-family: Lato, sans-serif;
  font-weight: 400;

  --co-body-bg: #eee;
  --co-body-text: #444;
  --co-body-accent: #4834d4;
  --co-body-accent-contrast: #fff;
  --co-textfld-bg: #fff;
  --co-textfld-border: #ccc;
  --co-textfld-active-border: #aaa;
  --co-textfld-focus-border: var(--co-body-accent);
  --co-textfld-valid-border: hsl(140 50% 75%);
  --co-textfld-valid-active-border: hsl(140 50% 65%);
  --co-textfld-valid-focus-border: hsl(140 50% 50%);
  --co-textfld-invalid-border: hsl(20 65% 75%);
  --co-textfld-invalid-active-border: hsl(20 65% 65%);
  --co-textfld-invalid-focus-border: hsl(20 65% 50%);
  --co-btn-text: var(--co-body-accent-contrast);
  --co-btn-bg: var(--co-body-accent);
  --co-btn-active-bg: #333;
  --co-btn-focus-bg: #333;
}

.dark-mode {
  --co-body-bg: #111;
  --co-body-text: #ddd;
  --co-body-accent: #6c5ce7;
  --co-body-accent-contrast: #fff;
  --co-textfld-bg: #222;
  --co-textfld-border: #333;
  --co-textfld-active-border: #444;
  --co-textfld-focus-border: var(--co-body-accent);
  --co-textfld-valid-border: hsl(140 90% 20%);
  --co-textfld-valid-active-border: hsl(140 90% 30%);
  --co-textfld-valid-focus-border: hsl(140 90% 45%);
  --co-textfld-invalid-border: hsl(20 90% 20%);
  --co-textfld-invalid-active-border: hsl(20 90% 30%);
  --co-textfld-invalid-focus-border: hsl(20 90% 45%);
  --co-btn-text: var(--co-body-accent-contrast);
  --co-btn-bg: var(--co-body-accent);
  --co-btn-active-bg: #333;
  --co-btn-focus-bg: #333;
}

.dark-mode {
  color-scheme: dark;
}

:root {
  box-sizing: border-box;
}

*, *::before, *::after {
  box-sizing: inherit;
}

body {
  font: 1em/160% sans-serif;
  background-color: var(--co-body-bg);
  color: var(--co-body-text);
}

:root {
  --leading-inputs: 100%;
  --padding-inputs: 0.5em;
  --margin-label: 0.5em;
  --margin-form-gap: 1.5em;
  --margin-btn-gap: 1em;
  --width-input-border: 2px;
  --width-inputs: 250px;
  --width-textarea: 450px;
  --height-textarea: 250px;
  --radius-inputs: 0.25em;
  --opacity-input-disabled: 0.5;
  --transition-duration-inputs: 250ms;
  --transition-function-inputs: ease-in-out;
  --transition-inputs: color var(--transition-duration-inputs),
  background-color var(--transition-duration-inputs),
  border-color var(--transition-duration-inputs)
  var(--transition-function-inputs);
}

:read-only:not(label,
button,
input[type=button],
input[type=submit],
input[type=reset]) {
  cursor: default;
}

:disabled {
  opacity: var(--opacity-input-disabled);
  cursor: not-allowed;
}

/* All elemenets regardless of types */
input,
select,
option,
textarea,
button,
datalist,
fieldset,
legend,
optgroup,
output,
input::file-selector-button {
  font: inherit;
  color: inherit;
  accent-color: var(--co-body-accent);
  transition: var(--transition-inputs);
  line-height: var(--leading-inputs);
}

/* All elements with types */
/* Radio & Checkbox */
/* Buttons */
/* Select, Buttons and text-fields */
select,
textarea,
input[type=date],
input[type=datetime-local],
input[type=email],
input[type=month],
input[type=number],
input[type=password],
input[type=search],
input[type=tel],
input[type=text],
input[type=time],
input[type=url],
input[type=week],
button,
input[type=reset],
input[type=submit],
input[type=button],
input::file-selector-button {
  border: var(--width-input-border) solid var(--co-textfld-border);
  padding: var(--padding-inputs);
  border-radius: var(--radius-inputs);
  background-color: var(--co-textfld-bg);
}
select:focus,
textarea:focus,
input[type=date]:focus,
input[type=datetime-local]:focus,
input[type=email]:focus,
input[type=month]:focus,
input[type=number]:focus,
input[type=password]:focus,
input[type=search]:focus,
input[type=tel]:focus,
input[type=text]:focus,
input[type=time]:focus,
input[type=url]:focus,
input[type=week]:focus,
button:focus,
input[type=reset]:focus,
input[type=submit]:focus,
input[type=button]:focus,
input::file-selector-button:focus {
  outline: 0;
}

/* All text-fields x select */
select,
textarea,
input[type=date],
input[type=datetime-local],
input[type=email],
input[type=month],
input[type=number],
input[type=password],
input[type=search],
input[type=tel],
input[type=text],
input[type=time],
input[type=url],
input[type=week] {
  width: var(--width-inputs);
  max-width: 100%;
}
select:hover:not([readonly], [disabled]), select:active:not([readonly], [disabled]),
textarea:hover:not([readonly], [disabled]),
textarea:active:not([readonly], [disabled]),
input[type=date]:hover:not([readonly], [disabled]),
input[type=date]:active:not([readonly], [disabled]),
input[type=datetime-local]:hover:not([readonly], [disabled]),
input[type=datetime-local]:active:not([readonly], [disabled]),
input[type=email]:hover:not([readonly], [disabled]),
input[type=email]:active:not([readonly], [disabled]),
input[type=month]:hover:not([readonly], [disabled]),
input[type=month]:active:not([readonly], [disabled]),
input[type=number]:hover:not([readonly], [disabled]),
input[type=number]:active:not([readonly], [disabled]),
input[type=password]:hover:not([readonly], [disabled]),
input[type=password]:active:not([readonly], [disabled]),
input[type=search]:hover:not([readonly], [disabled]),
input[type=search]:active:not([readonly], [disabled]),
input[type=tel]:hover:not([readonly], [disabled]),
input[type=tel]:active:not([readonly], [disabled]),
input[type=text]:hover:not([readonly], [disabled]),
input[type=text]:active:not([readonly], [disabled]),
input[type=time]:hover:not([readonly], [disabled]),
input[type=time]:active:not([readonly], [disabled]),
input[type=url]:hover:not([readonly], [disabled]),
input[type=url]:active:not([readonly], [disabled]),
input[type=week]:hover:not([readonly], [disabled]),
input[type=week]:active:not([readonly], [disabled]) {
  border-color: var(--co-textfld-active-border);
}
select:focus:not([readonly], [disabled]),
textarea:focus:not([readonly], [disabled]),
input[type=date]:focus:not([readonly], [disabled]),
input[type=datetime-local]:focus:not([readonly], [disabled]),
input[type=email]:focus:not([readonly], [disabled]),
input[type=month]:focus:not([readonly], [disabled]),
input[type=number]:focus:not([readonly], [disabled]),
input[type=password]:focus:not([readonly], [disabled]),
input[type=search]:focus:not([readonly], [disabled]),
input[type=tel]:focus:not([readonly], [disabled]),
input[type=text]:focus:not([readonly], [disabled]),
input[type=time]:focus:not([readonly], [disabled]),
input[type=url]:focus:not([readonly], [disabled]),
input[type=week]:focus:not([readonly], [disabled]) {
  border-color: var(--co-textfld-focus-border);
}
select:required:valid:hover:not([readonly], [disabled]), select:required:valid:active:not([readonly], [disabled]),
textarea:required:valid:hover:not([readonly], [disabled]),
textarea:required:valid:active:not([readonly], [disabled]),
input[type=date]:required:valid:hover:not([readonly], [disabled]),
input[type=date]:required:valid:active:not([readonly], [disabled]),
input[type=datetime-local]:required:valid:hover:not([readonly], [disabled]),
input[type=datetime-local]:required:valid:active:not([readonly], [disabled]),
input[type=email]:required:valid:hover:not([readonly], [disabled]),
input[type=email]:required:valid:active:not([readonly], [disabled]),
input[type=month]:required:valid:hover:not([readonly], [disabled]),
input[type=month]:required:valid:active:not([readonly], [disabled]),
input[type=number]:required:valid:hover:not([readonly], [disabled]),
input[type=number]:required:valid:active:not([readonly], [disabled]),
input[type=password]:required:valid:hover:not([readonly], [disabled]),
input[type=password]:required:valid:active:not([readonly], [disabled]),
input[type=search]:required:valid:hover:not([readonly], [disabled]),
input[type=search]:required:valid:active:not([readonly], [disabled]),
input[type=tel]:required:valid:hover:not([readonly], [disabled]),
input[type=tel]:required:valid:active:not([readonly], [disabled]),
input[type=text]:required:valid:hover:not([readonly], [disabled]),
input[type=text]:required:valid:active:not([readonly], [disabled]),
input[type=time]:required:valid:hover:not([readonly], [disabled]),
input[type=time]:required:valid:active:not([readonly], [disabled]),
input[type=url]:required:valid:hover:not([readonly], [disabled]),
input[type=url]:required:valid:active:not([readonly], [disabled]),
input[type=week]:required:valid:hover:not([readonly], [disabled]),
input[type=week]:required:valid:active:not([readonly], [disabled]) {
  border-color: var(--co-textfld-valid-active-border);
}
select:required:valid:focus:not([readonly], [disabled]),
textarea:required:valid:focus:not([readonly], [disabled]),
input[type=date]:required:valid:focus:not([readonly], [disabled]),
input[type=datetime-local]:required:valid:focus:not([readonly], [disabled]),
input[type=email]:required:valid:focus:not([readonly], [disabled]),
input[type=month]:required:valid:focus:not([readonly], [disabled]),
input[type=number]:required:valid:focus:not([readonly], [disabled]),
input[type=password]:required:valid:focus:not([readonly], [disabled]),
input[type=search]:required:valid:focus:not([readonly], [disabled]),
input[type=tel]:required:valid:focus:not([readonly], [disabled]),
input[type=text]:required:valid:focus:not([readonly], [disabled]),
input[type=time]:required:valid:focus:not([readonly], [disabled]),
input[type=url]:required:valid:focus:not([readonly], [disabled]),
input[type=week]:required:valid:focus:not([readonly], [disabled]) {
  border-color: var(--co-textfld-valid-focus-border);
}
select:required:invalid:hover, select:required:invalid:active,
textarea:required:invalid:hover,
textarea:required:invalid:active,
input[type=date]:required:invalid:hover,
input[type=date]:required:invalid:active,
input[type=datetime-local]:required:invalid:hover,
input[type=datetime-local]:required:invalid:active,
input[type=email]:required:invalid:hover,
input[type=email]:required:invalid:active,
input[type=month]:required:invalid:hover,
input[type=month]:required:invalid:active,
input[type=number]:required:invalid:hover,
input[type=number]:required:invalid:active,
input[type=password]:required:invalid:hover,
input[type=password]:required:invalid:active,
input[type=search]:required:invalid:hover,
input[type=search]:required:invalid:active,
input[type=tel]:required:invalid:hover,
input[type=tel]:required:invalid:active,
input[type=text]:required:invalid:hover,
input[type=text]:required:invalid:active,
input[type=time]:required:invalid:hover,
input[type=time]:required:invalid:active,
input[type=url]:required:invalid:hover,
input[type=url]:required:invalid:active,
input[type=week]:required:invalid:hover,
input[type=week]:required:invalid:active {
  border-color: var(--co-textfld-invalid-active-border);
}
select:required:invalid:focus,
textarea:required:invalid:focus,
input[type=date]:required:invalid:focus,
input[type=datetime-local]:required:invalid:focus,
input[type=email]:required:invalid:focus,
input[type=month]:required:invalid:focus,
input[type=number]:required:invalid:focus,
input[type=password]:required:invalid:focus,
input[type=search]:required:invalid:focus,
input[type=tel]:required:invalid:focus,
input[type=text]:required:invalid:focus,
input[type=time]:required:invalid:focus,
input[type=url]:required:invalid:focus,
input[type=week]:required:invalid:focus {
  border-color: var(--co-textfld-invalid-focus-border);
}
select::selection,
textarea::selection,
input[type=date]::selection,
input[type=datetime-local]::selection,
input[type=email]::selection,
input[type=month]::selection,
input[type=number]::selection,
input[type=password]::selection,
input[type=search]::selection,
input[type=tel]::selection,
input[type=text]::selection,
input[type=time]::selection,
input[type=url]::selection,
input[type=week]::selection {
  background-color: var(--co-body-accent);
  color: var(--co-body-accent-contrast);
}

select:not([disabled], [readonly]) option:focus, select:not([disabled], [readonly]) option:active, select:not([disabled], [readonly]) option:hover, select:not([disabled], [readonly]) option:checked {
  background-color: var(--co-body-accent);
  color: var(--co-body-accent-contrast);
}

input[type=color] {
  cursor: pointer;
  border-style: solid;
  border-radius: var(--radius-inputs);
  border-color: var(--co-textfld-border);
  background-color: var(--co-textfld-bg);
}
input[type=color]:hover:not([disabled]), input[type=color]:active:not([disabled]) {
  border-color: var(--co-textfld-active-border);
}
input[type=color]:focus {
  outline: 0;
}
input[type=color]:focus:not([disabled]) {
  border-color: var(--co-textfld-focus-border);
}

button,
input[type=reset],
input[type=submit],
input[type=button],
input::file-selector-button {
  border-color: var(--co-btn-bg);
  background-color: var(--co-btn-bg);
  color: var(--co-btn-text);
  cursor: pointer;
}
button:hover, button:active,
input[type=reset]:hover,
input[type=reset]:active,
input[type=submit]:hover,
input[type=submit]:active,
input[type=button]:hover,
input[type=button]:active,
input::file-selector-button:hover,
input::file-selector-button:active {
  background-color: var(--co-btn-active-bg);
  border-color: var(--co-btn-active-bg);
}
button:focus,
input[type=reset]:focus,
input[type=submit]:focus,
input[type=button]:focus,
input::file-selector-button:focus {
  background-color: var(--co-btn-active-bg);
}

/* Labels */
label {
  cursor: pointer;
  display: block;
}
label + label, label + input, label + select, label + button, label + textarea {
  margin-top: var(--margin-label);
}

textarea {
  width: var(--width-textarea);
  height: var(--height-textarea);
}
textarea:read-only, textarea:disabled {
  resize: none;
}

input::file-selector-button {
  margin-right: var(--margin-form-gap);
}

label:has(input:disabled) {
  opacity: var(--opacity-input-disabled);
  cursor: not-allowed;
}
label:has(input:disabled) :disabled {
  opacity: 1;
}

.site-container {
  padding: 1.5em;
  max-width: 1160px;
  margin: 3em auto;
}

.form-row {
  gap: var(--margin-form-gap);
}
.form-row + .form-row {
  margin-top: var(--margin-form-gap);
}

.btn-group {
  gap: var(--margin-btn-gap);
}

.form-row,
.btn-group {
  display: flex;
  flex-wrap: wrap;
}

.demo-title {
  margin-top: 0;
  font-size: 2em;
}

.demo-subtitle {
  text-transform: uppercase;
  font-weight: 400;
}

#theme-switch-wrapper {
  position: fixed;
  right: 1.5em;
  top: 1.5em;
}

.form-cell.flex {
  display: flex;
  --margin-label: 0;
}
.form-cell.flex label {
  width: 150px;
}