/*
 * Form fields — field wrapper, input, textarea, select, checkbox / radio, switch.
 * Docs: design-system/docs/components/field.md
 *
 * <div class="ac-field">
 *   <label class="ac-field__label" for="name">Name <span class="ac-field__required">*</span></label>
 *   <input class="ac-input" id="name">
 *   <p class="ac-field__hint">…</p>
 * </div>
 */
.ac-field {
  display: flex;
  flex-direction: column;
  gap: var(--ac-space-1-5);
  min-width: 0;
}
.ac-field__label {
  font: var(--ac-font-small);
  font-weight: 700;
  color: var(--ac-color-text);
}
.ac-field__required { color: var(--ac-color-required); }
.ac-field__hint {
  font: var(--ac-font-small);
  font-weight: 500;
  color: var(--ac-color-text-muted);
  margin: 0;
}
.ac-field__error {
  font: var(--ac-font-small);
  color: var(--ac-color-required);
  margin: 0;
}

/* ---- Input / textarea ---- */
.ac-input,
.ac-textarea {
  width: 100%;
  height: var(--ac-control-md);
  padding: 0 var(--ac-space-3);
  border: 1px solid var(--ac-color-border-control);
  border-radius: var(--ac-radius-control);
  background: var(--ac-color-surface);
  color: var(--ac-color-text);
  font-family: var(--ac-font-family);
  font-size: var(--ac-field-font-size);
  font-weight: 400;
  outline: none;
}
.ac-textarea {
  height: auto;
  min-height: calc(var(--ac-control-md) * 2.5);
  padding: var(--ac-space-2-5) var(--ac-space-3);
  line-height: 1.5;
  resize: vertical;
}
.ac-input::placeholder,
.ac-textarea::placeholder { color: var(--ac-color-text-muted); }
.ac-input:focus,
.ac-textarea:focus {
  border-color: var(--ac-color-primary);
  box-shadow: 0 0 0 1px var(--ac-color-primary);
}
.ac-input--subtle { background: var(--ac-color-bg-subtle); }
.ac-input[aria-invalid='true'],
.ac-textarea[aria-invalid='true'] { border-color: var(--ac-color-required); }
.ac-input:disabled,
.ac-textarea:disabled {
  background: var(--ac-color-bg-subtle);
  color: var(--ac-color-text-disabled);
}

/* Input with a leading icon: <div class="ac-input-icon">{icon}<input class="ac-input"></div> */
.ac-input-icon {
  position: relative;
  display: block;
}
.ac-input-icon .ac-icon {
  position: absolute;
  left: var(--ac-space-3);
  top: 50%;
  transform: translateY(-50%);
  --ac-icon-size: 18px;
  color: var(--ac-color-text-muted);
  pointer-events: none;
}
.ac-input-icon > .ac-input { padding-left: 38px; }

/* ---- Select ---- */
.ac-select {
  width: 100%;
  height: var(--ac-control-md);
  padding: 0 32px 0 var(--ac-space-2-5);
  border: 1px solid var(--ac-color-border-control);
  border-radius: var(--ac-radius-control);
  background-color: var(--ac-color-surface);
  /* <select> has no pseudo-element: the chevron is a background image (token, one per theme). */
  background-image: var(--ac-select-chevron);
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 16px;
  color: var(--ac-color-text);
  font-family: var(--ac-font-family);
  font-size: var(--ac-select-font-size);
  font-weight: 600;
  appearance: none;
  cursor: pointer;
}
.ac-select:focus {
  outline: none;
  border-color: var(--ac-color-primary);
  box-shadow: 0 0 0 1px var(--ac-color-primary);
}
/* ---- Checkbox / radio ---- */
.ac-check {
  display: inline-flex;
  align-items: center;
  gap: var(--ac-space-2);
  min-height: var(--ac-hit-min);
  font: var(--ac-font-body);
  cursor: pointer;
}
.ac-check input {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--ac-color-primary);
  cursor: pointer;
}

/* ---- Switch: <label class="ac-switch"><input type="checkbox" role="switch"> Label</label> ---- */
.ac-switch {
  display: inline-flex;
  align-items: center;
  gap: var(--ac-space-2);
  min-height: var(--ac-hit-min);
  font: var(--ac-font-body);
  cursor: pointer;
}
.ac-switch input {
  appearance: none;
  width: 36px;
  height: 20px;
  margin: 0;
  border-radius: var(--ac-radius-pill);
  background: var(--ac-color-border-control);
  position: relative;
  cursor: pointer;
  transition: background-color var(--ac-duration-fast);
  flex-shrink: 0;
}
.ac-switch input::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ac-color-surface);
  box-shadow: var(--ac-shadow-e1);
  transition: transform var(--ac-duration-fast);
}
.ac-switch input:checked { background: var(--ac-color-primary); }
.ac-switch input:checked::after { transform: translateX(16px); }

/* ---- File input: a real <input type="file"> stretched over a dashed control ----
 *   <div class="ac-file-input">
 *     <label class="ac-field__label" for="zip">Collection export</label>
 *     <span class="ac-file-input__control">
 *       {upload icon}<span class="ac-file-input__name ac-file-input__name--empty">Choose a file…</span>
 *       <input type="file" id="zip" accept=".zip">
 *     </span>
 *   </div>
 * js/ac.js writes the chosen file name into __name on change. */
.ac-file-input {
  display: flex;
  flex-direction: column;
  gap: var(--ac-space-1-5);
  min-width: 0;
}
.ac-file-input__control {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--ac-space-2);
  height: var(--ac-control-md);
  padding: 0 var(--ac-space-3);
  border: 1px dashed var(--ac-color-border-dashed);
  border-radius: var(--ac-radius-control);
  background: var(--ac-color-bg-subtle);
  color: var(--ac-color-text-2);
  font-size: var(--ac-font-size-body);
}
.ac-file-input__control:focus-within {
  border: 2px solid var(--ac-color-primary);
  padding-inline: calc(var(--ac-space-3) - 1px);
}
.ac-file-input__control:has(input:disabled) { color: var(--ac-color-text-disabled); }
.ac-file-input__name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--ac-color-text);
}
.ac-file-input__name--empty { color: var(--ac-color-text-muted); }
/* The native input covers the control: a click anywhere opens the file dialog. */
.ac-file-input__control input {
  position: absolute;
  inset: -1px; /* over the border too: the whole --ac-control-md box opens the dialog */
  opacity: 0;
  cursor: pointer;
}
.ac-file-input__control input:disabled { cursor: default; }

/* ---- Radio card: a rich radio choice (format, deck type) ----
 *   <div role="radiogroup" aria-label="Format">
 *     <label class="ac-radio-card">
 *       <input type="radio" name="format" value="standard" checked>
 *       <span class="ac-radio-card__body">
 *         <span class="ac-radio-card__head"><span class="ac-radio-card__title">Standard</span><span class="ac-tag ac-tag--green">Ranked</span></span>
 *         <span class="ac-radio-card__desc">The official format.</span>
 *       </span>
 *     </label>
 *   </div>
 * --stacked: tag under the description; --compact: one-line description, tag centred on the right.
 * Selected: the checked input (no class). */
.ac-radio-card {
  display: flex;
  gap: var(--ac-space-2-5);
  align-items: center;
  height: 100%;
  padding: var(--ac-space-2-5) var(--ac-space-3);
  border: 1px solid var(--ac-color-border-control);
  border-radius: var(--ac-radius-lg);
  background: var(--ac-color-surface);
  cursor: pointer;
}
.ac-radio-card:has(input:checked) {
  border: 2px solid var(--ac-color-primary);
  background: var(--ac-color-primary-tint);
  padding: calc(var(--ac-space-2-5) - 1px) calc(var(--ac-space-3) - 1px);
}
.ac-radio-card:has(input:focus-visible) {
  outline: 2px solid var(--ac-color-primary);
  outline-offset: 2px;
}
.ac-radio-card input {
  width: 20px;
  height: 20px;
  margin: 0;
  accent-color: var(--ac-color-primary);
  flex-shrink: 0;
}
.ac-radio-card input:focus-visible { outline: none; }
.ac-radio-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--ac-space-0-5);
  min-width: 0;
  flex-grow: 1;
}
.ac-radio-card__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--ac-space-2);
}
.ac-radio-card__title { font: var(--ac-font-body-strong); }
.ac-radio-card__desc {
  font-size: var(--ac-font-size-caption);
  line-height: 1.35;
  color: var(--ac-color-text-2);
  overflow: hidden;
  text-overflow: ellipsis;
}
.ac-radio-card .ac-tag { align-self: flex-start; }

.ac-radio-card--stacked {
  align-items: flex-start;
  gap: var(--ac-space-3);
  padding: 14px;
}
.ac-radio-card--stacked:has(input:checked) { padding: 13px; }
.ac-radio-card--stacked input { width: 18px; height: 18px; margin-top: 2px; }
.ac-radio-card--stacked .ac-radio-card__body { gap: var(--ac-space-1-5); }
.ac-radio-card--stacked .ac-radio-card__desc { font-size: var(--ac-font-size-small); }
.ac-radio-card--stacked .ac-tag { font-size: var(--ac-font-size-caption); }

.ac-radio-card--compact { padding: var(--ac-space-2) var(--ac-space-2-5); }
.ac-radio-card--compact:has(input:checked) { padding: calc(var(--ac-space-2) - 1px) calc(var(--ac-space-2-5) - 1px); }
.ac-radio-card--compact input { width: 18px; height: 18px; }
.ac-radio-card--compact .ac-radio-card__body { gap: 1px; }
.ac-radio-card--compact .ac-radio-card__title { font-size: var(--ac-field-font-size); font-weight: 700; line-height: 1.2; }
.ac-radio-card--compact .ac-radio-card__desc { white-space: nowrap; line-height: 1.2; }
.ac-radio-card--compact .ac-tag { align-self: center; }