/*
 * Patterns adapted from GOV.UK Frontend (https://github.com/alphagov/govuk-frontend),
 * MIT License, Crown copyright. See LICENSES/govuk-frontend-MIT.txt.
 *
 * What we forked: the label / hint / error markup and behaviour, the error
 * summary that links to each errored field, radio and checkbox sizing, the
 * yellow focus style and the "one thing per page" rhythm.
 * What we never took: the Crown, the GDS Transport font, or any GOV.UK colour
 * or branding. Every value below comes from tokens.css.
 */

.field {
  margin: 0 0 var(--s-5);
}

.field-label {
  display: block;
  margin: 0 0 var(--s-1);
  color: var(--ink);
  font-size: var(--fs-body);
  font-weight: 700;
  line-height: 1.3;
}

.field-hint {
  display: block;
  margin: 0 0 var(--s-2);
  color: var(--muted);
  font-size: var(--fs-small);
  line-height: var(--lh-small);
}

/* ---- the input, with its unit box attached ---- */

.input-group {
  display: flex;
  align-items: stretch;
  max-width: 22rem;
}

.field input,
.field select {
  width: 100%;
  min-width: 0;
  min-height: var(--control-h);
  padding: var(--s-2) var(--s-3);
  border: 2px solid var(--input-border);
  border-radius: var(--radius-input);
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-variant-numeric: tabular-nums;
}

.field select {
  padding-right: var(--s-4);
}

.input-group > input {
  flex: 1 1 auto;
}

.unit {
  display: grid;
  place-items: center;
  min-width: var(--tap);
  min-height: var(--control-h);
  padding: 0 var(--s-3);
  border: 2px solid var(--input-border);
  background: var(--brand-tint);
  color: var(--ink);
  font-size: var(--fs-body);
  font-weight: 600;
}

.unit-prefix {
  border-right: 0;
  border-radius: var(--radius-input) 0 0 var(--radius-input);
}

.unit-suffix {
  border-left: 0;
  border-radius: 0 var(--radius-input) var(--radius-input) 0;
}

.input-group > .unit-prefix + input,
.input-group > .unit-prefix + input:focus {
  border-left: 0;
  border-radius: 0 var(--radius-input) var(--radius-input) 0;
}

.input-group > input:has(+ .unit-suffix),
.input-group > input:has(+ .unit-suffix):focus {
  border-right: 0;
  border-radius: var(--radius-input) 0 0 var(--radius-input);
}

/* ---- errors: a red left bar, above the input, plus the summary ---- */

.field-error,
.error {
  display: block;
  margin: 0 0 var(--s-2);
  padding: var(--s-1) var(--s-3);
  border-left: 4px solid var(--error);
  color: var(--error);
  font-size: var(--fs-small);
  font-weight: 600;
  line-height: var(--lh-small);
  max-width: var(--measure);
}

.field[data-invalid="true"] input,
.field[data-invalid="true"] select {
  border-color: var(--error);
}

.error-summary {
  margin: 0 0 var(--s-5);
  padding: var(--s-4);
  border: 2px solid var(--error);
  border-radius: var(--radius-card);
  background: var(--surface);
  max-width: var(--measure);
}

.error-summary h2 {
  margin: 0 0 var(--s-2);
  color: var(--error);
  font-size: var(--fs-h3);
}

.error-summary ul {
  margin: 0;
  padding-left: var(--s-5);
}

.error-summary li {
  margin-bottom: var(--s-1);
}

.error-summary a {
  color: var(--error);
  font-weight: 600;
}

/* ---- radio and checkbox sizing ---- */

/* Never smaller than a tap target, and next to it the label is a second hit
   area. (GOV.UK sizes these at 40px and pads the target; we take the whole
   target.) */
input[type="radio"],
input[type="checkbox"] {
  flex: 0 0 auto;
  width: var(--tap);
  height: var(--tap);
  margin: 0;
  accent-color: var(--brand);
}

/* An answer card draws its own control, so the radio fills the card instead. */
.choice input[type="radio"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
}

/* ---- the GOV.UK focus style, in our tokens ---- */

input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.error-summary:focus-visible,
.error-summary a:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 2px;
  box-shadow: 0 0 0 7px var(--focus);
}