/*!
 * forms.css — formulaires : champs, cases-cartes, étapes, progression, interrupteur.
 * Pages : contact, audit gratuit, quiz, guide de style.
 * À charger APRÈS styles.css (qui déclare l'ordre des couches). Documentation : docs/portfolio-design-system.md
 */
@layer components {
  /* ---------- Formulaires ---------- */
  /* Bouton en cours d'envoi : <button class="btn" aria-busy="true"> */
  .btn[aria-busy="true"] { position: relative; color: transparent; pointer-events: none; }
  .btn[aria-busy="true"]::after {
    content: ""; position: absolute; inset: 0; margin: auto; inline-size: 1.1em; block-size: 1.1em;
    border: 2px solid var(--btn-fg); border-inline-end-color: transparent; border-radius: 50%;
  }
  @media (prefers-reduced-motion: no-preference) {
    .btn[aria-busy="true"]::after { animation: spin 0.8s linear infinite; }
  }
  @keyframes spin { to { rotate: 360deg; } }

  .form { display: grid; gap: var(--space-m); }
  .form__row { display: grid; gap: var(--space-m); }
  @media (min-width: 40em) { .form__row--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
  .field { display: grid; gap: 0.4rem; align-content: start; }
  .field__label { font-weight: 550; font-size: var(--text-ui); }
  .field__opt { font-weight: 400; color: var(--c-text-2); }
  .field__req { color: var(--c-accent-text); }
  .field__hint { font-size: var(--step--1); color: var(--c-text-2); }
  .input, .select, .textarea {
    inline-size: 100%; min-block-size: 3rem; padding: 0.7rem 0.9rem;
    border: 1px solid var(--c-line-strong); border-radius: var(--radius-s);
    background: var(--c-raised); color: var(--c-text); font-size: 1rem; line-height: 1.4;
    transition: border-color var(--dur-2), box-shadow var(--dur-2);
  }
  .input::placeholder, .textarea::placeholder { color: var(--c-text-3); opacity: 1; }
  .input:hover, .select:hover, .textarea:hover { border-color: var(--c-text-3); }
  .input:focus-visible, .select:focus-visible, .textarea:focus-visible { outline: 2px solid var(--c-focus); outline-offset: 1px; border-color: var(--c-text); }
  .textarea { min-block-size: 8rem; resize: vertical; }
  @supports (field-sizing: content) { .textarea { field-sizing: content; min-block-size: 8rem; max-block-size: 24rem; } }
  .select { appearance: none; padding-inline-end: 2.75rem; background-image: linear-gradient(45deg, transparent 50%, var(--c-text-2) 50%), linear-gradient(135deg, var(--c-text-2) 50%, transparent 50%); background-position: right 1.35rem center, right 1rem center; background-size: 0.36rem 0.36rem; background-repeat: no-repeat; }
  .input[aria-invalid="true"], .select[aria-invalid="true"], .textarea[aria-invalid="true"] { border-color: var(--c-danger); box-shadow: 0 0 0 1px var(--c-danger); }
  .input.is-valid, .select.is-valid, .textarea.is-valid { border-color: var(--c-led-text); }
  .field__error { display: flex; gap: 0.4rem; align-items: baseline; color: var(--c-danger); font-size: var(--step--1); font-weight: 500; }
  .field__error:empty { display: none; }
  .field__error::before { content: "!"; display: inline-grid; place-items: center; flex: none; inline-size: 1.1em; block-size: 1.1em; border-radius: 50%; background: currentColor; color: var(--c-bg); font-size: 0.8em; font-weight: 700; translate: 0 0.12em; }
  .field__success { color: var(--c-led-text); font-size: var(--step--1); font-weight: 500; }
  .check { display: flex; gap: 0.7rem; align-items: flex-start; font-size: var(--step--1); line-height: 1.5; cursor: pointer; }
  .check input { flex: none; inline-size: 1.25rem; block-size: 1.25rem; margin-block-start: 0.1rem; cursor: pointer; }
  .check a { font-weight: 500; }
  .choices { display: grid; gap: 0.75rem; grid-template-columns: repeat(auto-fill, minmax(min(14rem, 100%), 1fr)); }
  .choice { position: relative; display: grid; gap: 0.2rem; padding: 0.95rem 1rem 0.95rem 2.9rem; border: 1px solid var(--c-line-strong); border-radius: var(--radius-m); background: var(--c-raised); cursor: pointer; transition: border-color var(--dur-2), background-color var(--dur-2), box-shadow var(--dur-2); }
  .choice:hover { border-color: var(--c-text-3); }
  .choice input { position: absolute; inset-inline-start: 1rem; inset-block-start: 1.1rem; inline-size: 1.15rem; block-size: 1.15rem; margin: 0; cursor: pointer; }
  .choice__title { font-weight: 600; line-height: 1.3; }
  .choice__desc { font-size: var(--step--1); color: var(--c-text-2); line-height: 1.45; }
  .choice:has(:checked) { border-color: var(--c-text); box-shadow: inset 0 0 0 1px var(--c-text); background: color-mix(in srgb, var(--c-accent) 9%, var(--c-raised)); }
  .choice:has(:focus-visible) { outline: 2px solid var(--c-focus); outline-offset: 2px; }
  .choice input:focus-visible { outline: none; }
  .form-legend { font-size: var(--step-2); font-weight: 600; letter-spacing: -0.02em; line-height: 1.2; margin-block-end: var(--space-s); }
  .hp { position: absolute; inset-inline-start: -10000px; inline-size: 1px; block-size: 1px; overflow: hidden; }
  .form-status { padding: 0.9rem 1rem; border-radius: var(--radius-m); border: 1px solid var(--c-line-strong); background: var(--c-raised); font-size: var(--step--1); }
  .form-status:empty { display: none; }
  .form-status--success { border-color: var(--c-led-text); }
  .form-status--error { border-color: var(--c-danger); color: var(--c-danger); }
  .form-status .cluster { margin-block-start: 0.75rem; }
  .form-note { font-size: var(--step--1); color: var(--c-text-2); }

  /* Progression d'un formulaire en étapes */
  .progress { display: grid; gap: 0.5rem; }
  .progress__label { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: var(--text-label); letter-spacing: 0.04em; color: var(--c-text-2); }
  .progress__bar { appearance: none; inline-size: 100%; block-size: 0.375rem; border: 0; border-radius: var(--radius-pill); background: var(--c-line); overflow: hidden; color: var(--c-accent); }
  .progress__bar::-webkit-progress-bar { background: var(--c-line); border-radius: var(--radius-pill); }
  .progress__bar::-webkit-progress-value { background: var(--c-accent); border-radius: var(--radius-pill); transition: inline-size var(--dur-3) var(--ease-out); }
  .progress__bar::-moz-progress-bar { background: var(--c-accent); border-radius: var(--radius-pill); }
  .stepper { display: flex; gap: 0.35rem; list-style: none; padding: 0; counter-reset: stepper; }
  .stepper li { flex: 1; display: grid; gap: 0.4rem; font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.04em; color: var(--c-text-3); counter-increment: stepper; }
  .stepper li::before { content: ""; block-size: 3px; border-radius: var(--radius-pill); background: var(--c-line-strong); }
  .stepper li.is-done::before { background: var(--c-text); }
  .stepper li[aria-current="step"] { color: var(--c-text); }
  .stepper li[aria-current="step"]::before { background: var(--c-accent); }
  .stepper__name { display: none; }
  @media (min-width: 48em) { .stepper__name { display: block; } }

  /* ---------- Interrupteur (bouton à bascule) ---------- */
  .switch { display: inline-flex; align-items: center; gap: 0.6rem; min-block-size: 2.75rem; font-size: 0.875rem; font-weight: 500; }
  .switch__track { position: relative; flex: none; inline-size: 2.5rem; block-size: 1.5rem; border-radius: var(--radius-pill); background: var(--c-line-strong); transition: background-color var(--dur-2); }
  .switch__track::after { content: ""; position: absolute; inset-block-start: 3px; inset-inline-start: 3px; inline-size: calc(1.5rem - 6px); block-size: calc(1.5rem - 6px); border-radius: 50%; background: var(--c-raised); box-shadow: var(--shadow-1); transition: translate var(--dur-3) var(--ease-out); }
  .switch[aria-pressed="true"] .switch__track, .switch[aria-checked="true"] .switch__track { background: var(--c-text); }
  .switch[aria-pressed="true"] .switch__track::after, .switch[aria-checked="true"] .switch__track::after { translate: 1rem 0; }

  /* Carte de formulaire */
  .form-card { padding: var(--space-l); border: 1px solid var(--c-line-strong); border-radius: var(--radius-l); background: var(--c-raised); box-shadow: var(--shadow-1); }
  .form-card__title { font-size: var(--step-2); }
}