/* =============================================================================
   KDU Developer Community — Form
   Loaded only by join.html. Depends on variables.css, base.css, components.css.
   ========================================================================== */

.form {
  border-top: 1px solid var(--color-border-strong);
}

.fieldset {
  border: 0;
  padding: 0;
  margin: 0;
  padding-block: clamp(1.75rem, 3.5vw, 2.5rem);
  border-bottom: var(--rule);
}

.fieldset__legend {
  display: block;
  width: 100%;
  font-family: var(--font);
  font-size: var(--fs-caption);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-caption);
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: 0;
  margin-bottom: var(--space-5);
}

.req { color: var(--color-ink); font-weight: var(--weight-medium); }

.opt {
  color: var(--color-text-faint);
  font-weight: var(--weight-body);
  text-transform: none;
  letter-spacing: 0.01em;
}

/* --- Fields --------------------------------------------------------------- */
.fields { display: grid; gap: var(--space-5); }

@media (min-width: 40rem) {
  .fields--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.field { display: grid; gap: var(--space-2); }

.field__label {
  font-family: var(--font);
  font-size: var(--fs-caption);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-ink);
}

.field__hint {
  font-size: var(--fs-small);
  color: var(--color-text-muted);
  line-height: 1.45;
}

.input,
.textarea,
.select {
  width: 100%;
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
  -webkit-appearance: none;
          appearance: none;
}

.input::placeholder,
.textarea::placeholder { color: var(--color-text-faint); }

.input:hover,
.textarea:hover { border-color: var(--color-ink); }

.input:focus-visible,
.textarea:focus-visible { border-color: var(--color-ink); }

.textarea { min-height: 9rem; resize: vertical; }

.field[data-invalid="true"] .input,
.field[data-invalid="true"] .textarea {
  border-color: var(--color-invalid);
  border-width: var(--border-heavy);
  background: var(--color-invalid-field);
}

.field__error {
  display: none;
  align-items: flex-start;
  gap: var(--space-2);
  font-family: var(--font);
  font-size: var(--fs-micro);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-ink);
}

.field[data-invalid="true"] .field__error { display: flex; }

.field__error::before {
  content: "!";
  flex: none;
  display: grid;
  place-items: center;
  width: 1.1em;
  height: 1.1em;
  border: 1px solid currentColor;
  font-size: 0.9em;
  line-height: 1;
}

/* --- Choices: checkboxes and radios --------------------------------------- */
.choices {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(min(13rem, 100%), 1fr));
}

.choices--row { grid-template-columns: repeat(auto-fit, minmax(min(9rem, 100%), 1fr)); }

/* Options sized to their own labels, so a longer one does not force the whole
   row onto two lines. */
.choices--inline { display: flex; flex-wrap: wrap; }

.choice {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  font-size: var(--fs-small);
  line-height: 1.4;
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.choice:hover { border-color: var(--color-border-strong); }

.choice:has(input:checked) {
  border-color: var(--color-ink);
  background: var(--color-bg-alt);
}

.choice:has(input:focus-visible) {
  outline: var(--focus-width) solid var(--color-focus);
  outline-offset: var(--focus-offset);
}

/* The native control is kept in the accessibility tree and simply restyled. */
.choice input {
  flex: none;
  width: 1.05rem;
  height: 1.05rem;
  margin: 0.15rem 0 0;
  -webkit-appearance: none;
          appearance: none;
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface);
  display: grid;
  place-content: center;
  cursor: pointer;
}

.choice input[type="radio"] { border-radius: 50%; }

.choice input:checked { border-color: var(--color-ink); background: var(--color-ink); }

.choice input[type="checkbox"]:checked::after {
  content: "";
  width: 0.62rem;
  height: 0.62rem;
  background: var(--color-on-dark);
  clip-path: polygon(14% 46%, 0 60%, 38% 96%, 100% 22%, 86% 10%, 38% 68%);
}

.choice input[type="radio"]:checked::after {
  content: "";
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--color-on-dark);
}

.fieldset[data-invalid="true"] .choices { outline: var(--border-heavy) solid var(--color-invalid); outline-offset: var(--space-3); }

/* --- Consent -------------------------------------------------------------- */
.consent {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--fs-small);
  line-height: 1.55;
  color: var(--color-text);
  cursor: pointer;
}

.consent input {
  flex: none;
  width: 1.15rem;
  height: 1.15rem;
  margin: 0.15rem 0 0;
  -webkit-appearance: none;
          appearance: none;
  border: 1px solid var(--color-ink);
  background: var(--color-surface);
  display: grid;
  place-content: center;
  cursor: pointer;
}

.consent input:checked { background: var(--color-ink); }

.consent input:checked::after {
  content: "";
  width: 0.68rem;
  height: 0.68rem;
  background: var(--color-on-dark);
  clip-path: polygon(14% 46%, 0 60%, 38% 96%, 100% 22%, 86% 10%, 38% 68%);
}

.consent:has(input:focus-visible) {
  outline: var(--focus-width) solid var(--color-focus);
  outline-offset: var(--focus-offset);
}

.field--consent[data-invalid="true"] .consent input { border-width: var(--border-heavy); background: var(--color-invalid-field); }

/* --- Honeypot: never shown, never focusable, never announced -------------- */
.hp {
  position: absolute !important;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

/* --- Actions and status --------------------------------------------------- */
.form__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-5);
  padding-top: var(--space-6);
}

.form__note { font-size: var(--fs-small); color: var(--color-text-muted); max-width: 34ch; }

.form__status {
  display: none;
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface);
}

.form__status[data-state="success"],
.form__status[data-state="error"] { display: flex; }

.form__status[data-state="success"] { border-width: var(--border-heavy); border-color: var(--color-ink); }
.form__status[data-state="error"] { border-width: var(--border-heavy); border-color: var(--color-ink); background: var(--color-bg-alt); }

.form__status-mark {
  flex: none;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--color-ink);
  display: grid;
  place-items: center;
  font-family: var(--font);
  font-size: var(--fs-caption);
  color: var(--color-ink);
}

.form__status-title {
  font-family: var(--font);
  font-size: var(--fs-h4);
  font-weight: var(--weight-semibold);
  color: var(--color-ink);
}

.form__status-text { font-size: var(--fs-small); color: var(--color-text-muted); margin-top: var(--space-2); }

/* When the submission succeeds the form is replaced by the confirmation. */
.form.is-sent .fieldset,
.form.is-sent .form__actions { display: none; }

/* Busy state on the submit button */
.btn__label-busy { display: none; }
.btn[data-busy="true"] .btn__label { display: none; }
.btn[data-busy="true"] .btn__label-busy { display: inline; }