/* -- Questionnaire ------------------------------------------------- */
/* One question at a time: a <form> whose steps are <fieldset>s; the  */
/* controller shows one (hidden on the others) - without JavaScript    */
/* every step shows and it is a plain long form.                       */

@layer components {
  .questionnaire {
    display: grid;
    gap: 1.25rem;
    width: 100%;
    color: var(--foreground);

    &[data-busy] {
      cursor: progress;

      & .questionnaire-actions {
        opacity: 0.6;
        pointer-events: none;
      }
    }
  }

  .questionnaire-block {
    display: grid;
    gap: 1rem;
  }

  /* the block's own heading (optional) */
  .questionnaire-block-title {
    margin: 0;
    color: var(--muted-foreground);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  /* -- a step ----------------------------------------------------- */
  .questionnaire-step {
    display: grid;
    gap: 0.75rem;
    min-width: 0;
    margin: 0;
    padding: 0;
    border: 0;

    &:not([hidden]) {
      animation: questionnaire-in 220ms ease both;
    }
  }

  .questionnaire-title {
    padding: 0;
    margin-block-end: 0.25rem;
    font-size: 1.375rem;
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.01em;
    text-wrap: balance;
  }

  .questionnaire-description {
    margin: 0;
    color: var(--muted-foreground);
    font-size: 0.9375rem;
    text-wrap: pretty;
  }

  .questionnaire-field {
    display: grid;
    gap: 0.375rem;
  }

  /* -- choices: cards with a key badge (A, B, C …) ------------------ */
  .questionnaire-choices {
    display: grid;
    gap: 0.5rem;

    &[data-columns="2"] {
      grid-template-columns: repeat(auto-fill, minmax(min(100%, 12rem), 1fr));
    }
  }

  .questionnaire-choice {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-height: 2.75rem;
    padding: 0.5rem 0.875rem 0.5rem 0.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--background);
    cursor: pointer;
    transition: border-color 120ms ease, background-color 120ms ease;

    /* the native control stays (keyboard, form data), the card shows the state */
    & > input[type="radio"],
    & > input[type="checkbox"] {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      margin: 0;
      opacity: 0;
      cursor: pointer;
    }

    &::before {
      content: attr(data-key);
      flex: none;
      display: grid;
      place-items: center;
      min-width: 1.5rem;
      height: 1.5rem;
      padding-inline: 0.25rem;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      background: var(--card);
      color: var(--muted-foreground);
      font-size: 0.75rem;
      font-weight: 600;
      font-variant-numeric: tabular-nums;
    }

    &:not([data-key])::before {
      content: none;
    }

    &:hover {
      border-color: color-mix(in oklch, var(--primary) 45%, var(--border));
      background: color-mix(in oklch, var(--accent) 50%, var(--background));
    }

    &:has(> input:checked) {
      border-color: var(--primary);
      background: color-mix(in oklch, var(--primary) 8%, var(--background));

      &::before {
        border-color: var(--primary);
        background: var(--primary);
        color: var(--primary-foreground);
      }
    }

    &:has(> input:focus-visible) {
      outline: 2px solid var(--ring);
      outline-offset: 2px;
    }

    &:has(> input:disabled) {
      opacity: 0.5;
      cursor: not-allowed;
    }
  }

  .questionnaire-choice-label {
    flex: 1;
    min-width: 0;
  }

  /* secondary text in a choice */
  .questionnaire-choice-hint {
    color: var(--muted-foreground);
    font-size: 0.8125rem;
  }

  /* freeform "Other": typing in it picks its choice; above the card's input */
  .questionnaire-other {
    position: relative;
    z-index: 1;
    flex: 1;
    min-width: 0;
    height: 2rem;
    padding-inline: 0.5rem;
    border: 1px solid var(--input);
    border-radius: var(--radius-sm);
    background: var(--background);
    color: var(--foreground);
    font: inherit;

    &:focus-visible {
      outline: 2px solid var(--ring);
      outline-offset: 1px;
    }
  }

  /* -- validation ----------------------------------------------------- */
  .questionnaire-error {
    margin: 0;
    color: var(--destructive);
    font-size: 0.875rem;
    font-weight: 500;
  }

  .questionnaire-step[aria-invalid="true"] .questionnaire-choice {
    border-color: color-mix(in oklch, var(--destructive) 55%, var(--border));
  }

  /* -- progress --------------------------------------------------------- */
  .questionnaire-progress {
    display: grid;
    gap: 0.5rem;
  }

  .questionnaire-progress-label {
    color: var(--muted-foreground);
    font-size: 0.8125rem;
    font-variant-numeric: tabular-nums;
  }

  .questionnaire-bar {
    width: 100%;
    height: 0.375rem;
    border: 0;
    border-radius: 999px;
    background: var(--muted);
    accent-color: var(--primary);
    appearance: none;
    overflow: hidden;

    &::-webkit-progress-bar {
      background: var(--muted);
    }

    &::-webkit-progress-value {
      background: var(--primary);
      border-radius: 999px;
      transition: inline-size 300ms ease;
    }

    &::-moz-progress-bar {
      background: var(--primary);
      border-radius: 999px;
    }
  }

  .questionnaire-blocks {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 1rem;
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 0.8125rem;
  }

  .questionnaire-block-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--muted-foreground);

    &::before {
      content: "";
      width: 0.5rem;
      height: 0.5rem;
      border: 1.5px solid currentColor;
      border-radius: 50%;
    }

    &[data-status="done"]::before {
      background: currentColor;
    }

    &[data-status="current"] {
      color: var(--foreground);
      font-weight: 600;

      &::before {
        border-color: var(--primary);
        background: var(--primary);
      }
    }
  }

  /* -- navigation --------------------------------------------------------- */
  .questionnaire-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;

    & [data-questionnaire="next"],
    & [data-questionnaire="submit"] {
      margin-inline-start: auto;
    }
  }

  /* a draft came back / answers were cleared */
  .questionnaire-notice {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.75rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    background: var(--muted);
    color: var(--muted-foreground);
    font-size: 0.8125rem;
  }

  .questionnaire-notice-action,
  .questionnaire-edit {
    padding: 0;
    border: 0;
    background: none;
    color: var(--primary);
    font: inherit;
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 2px;
    cursor: pointer;

    &:focus-visible {
      outline: 2px solid var(--ring);
      outline-offset: 2px;
      border-radius: 2px;
    }
  }

  /* -- branch history ------------------------------------------------------- */
  .questionnaire-trail-list {
    display: grid;
    gap: 0.125rem;
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: questionnaire-trail;

    & li {
      counter-increment: questionnaire-trail;
    }

    & li[data-status="ahead"] {
      opacity: 0.55;
    }
  }

  .questionnaire-trail-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0 0.5rem;
    width: 100%;
    padding: 0.375rem 0.5rem;
    border: 0;
    border-radius: var(--radius-sm);
    background: none;
    color: inherit;
    font: inherit;
    text-align: start;
    cursor: pointer;

    &::before {
      content: counter(questionnaire-trail);
      grid-row: span 2;
      display: grid;
      place-items: center;
      width: 1.25rem;
      height: 1.25rem;
      border-radius: 50%;
      background: var(--muted);
      color: var(--muted-foreground);
      font-size: 0.6875rem;
      font-weight: 600;
    }

    &[aria-current="step"] {
      background: var(--accent);
      color: var(--accent-foreground);

      &::before {
        background: var(--primary);
        color: var(--primary-foreground);
      }
    }

    &:hover {
      background: var(--accent);
    }

    &:focus-visible {
      outline: 2px solid var(--ring);
      outline-offset: -2px;
    }
  }

  .questionnaire-trail-question {
    font-size: 0.8125rem;
    font-weight: 500;
  }

  .questionnaire-trail-answer {
    overflow: hidden;
    color: var(--muted-foreground);
    font-size: 0.75rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  /* -- review --------------------------------------------------------------- */
  .questionnaire-summary-list {
    display: grid;
    margin: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
  }

  .questionnaire-summary-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 0.25rem 1rem;
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;

    & + & {
      border-top: 1px solid var(--border);
    }

    & dt {
      color: var(--muted-foreground);
    }

    & dd {
      display: flex;
      justify-content: space-between;
      gap: 0.75rem;
      margin: 0;
      font-weight: 500;
    }
  }

  .questionnaire-complete {
    display: grid;
    gap: 0.5rem;
    animation: questionnaire-in 220ms ease both;
  }

  /* the controller hides with [hidden]: it must win over every display above
     (and over a .btn's own display) */
  .questionnaire :is(.questionnaire-block, .questionnaire-step, .questionnaire-actions, .questionnaire-complete, .questionnaire-notice, .questionnaire-error, [data-questionnaire])[hidden] {
    display: none;
  }

  @keyframes questionnaire-in {
    from {
      opacity: 0;
      translate: 0 0.5rem;
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  @layer components {
    .questionnaire-step:not([hidden]),
    .questionnaire-complete,
    .questionnaire-choice,
    .questionnaire-bar::-webkit-progress-value {
      animation: none;
      transition: none;
    }
  }
}

@media (prefers-contrast: more) {
  @layer components {
    .questionnaire-choice,
    .questionnaire-summary-list {
      border-color: var(--foreground);
    }

    .questionnaire-description,
    .questionnaire-progress-label,
    .questionnaire-trail-answer {
      color: var(--foreground);
    }
  }
}

@media (forced-colors: active) {
  @layer components {
    .questionnaire-choice {
      border-color: ButtonText;

      &:has(> input:checked) {
        border-color: Highlight;
        outline: 2px solid Highlight;
      }
    }

    .questionnaire-bar {
      border: 1px solid CanvasText;
    }

    .questionnaire-error {
      color: LinkText;
    }
  }
}