/*
 * Feuille de style unique du serveur d'authentification.
 *
 * Volontairement sans framework ni dependance externe : ces pages doivent s'afficher meme si le
 * reseau du client bloque les CDN, et rester lisibles sans JavaScript.
 */

:root {
  color-scheme: light dark;

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --surface: #ffffff;
  --surface-muted: #f6f7f9;
  --page: #eef1f5;
  --border: #d8dde5;
  --text: #14181f;
  --text-muted: #5b6472;
  --accent: #1f52c4;
  --accent-hover: #17409c;
  --accent-contrast: #ffffff;
  --danger: #b3261e;
  --danger-surface: #fdecea;
  --success: #1a7f4b;

  --radius: 12px;
  --shadow: 0 1px 2px rgb(16 24 40 / 6%), 0 12px 32px rgb(16 24 40 / 8%);
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface: #171a20;
    --surface-muted: #1f232b;
    --page: #0e1014;
    --border: #303743;
    --text: #eef1f6;
    --text-muted: #a2acbb;
    --accent: #7ea2ff;
    --accent-hover: #9db8ff;
    --accent-contrast: #0e1014;
    --danger: #ff9a92;
    --danger-surface: #3a1e1c;
    --success: #6ed49e;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 12px 32px rgb(0 0 0 / 45%);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 1.5rem 1rem;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--page);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.page {
  width: 100%;
  max-width: 25rem;
}

/* --- Carte ---------------------------------------------------------------------------------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card__header {
  padding: 1.75rem 2rem 0;
}

.card__brand {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.card__body {
  padding: 1.25rem 2rem 2rem;
}

.card__title {
  margin: 0 0 0.25rem;
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.card__subtitle {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
  /* Les adresses email longues ne doivent pas elargir la carte. */
  overflow-wrap: anywhere;
}

/* --- Formulaire ----------------------------------------------------------------------------- */

.field {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  margin-bottom: 1.125rem;
}

.field__label {
  font-size: 0.875rem;
  font-weight: 550;
}

.field__control {
  width: 100%;
  padding: 0.6875rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-muted);
  color: var(--text);
  font: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field__control:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 28%, transparent);
}

.field__control[aria-invalid="true"] {
  border-color: var(--danger);
}

.field__error {
  color: var(--danger);
  font-size: 0.8125rem;
}

/* Saisie de code a usage unique : chiffres espaces, lisibles d'un coup d'oeil. */
.field__control--code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 1.25rem;
  letter-spacing: 0.35em;
  text-align: center;
}

/* --- Boutons -------------------------------------------------------------------------------- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0.6875rem 1rem;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-contrast);
  font: inherit;
  font-weight: 550;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.button:hover {
  background: var(--accent-hover);
}

.button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.button--secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.button--secondary:hover {
  background: var(--surface-muted);
}

/* --- Messages ------------------------------------------------------------------------------- */

.alert {
  margin: 0 0 1.25rem;
  padding: 0.75rem 0.875rem;
  border-radius: 8px;
  background: var(--danger-surface);
  color: var(--danger);
  font-size: 0.875rem;
}

.alert--success {
  background: color-mix(in srgb, var(--success) 14%, transparent);
  color: var(--success);
}

/* Lien de retour sous le formulaire. */
.card__footnote {
  margin: 1rem 0 0;
  text-align: center;
  font-size: 0.875rem;
}

.card__footnote a {
  color: var(--text-muted);
}

.button + .button,
form + form .button {
  margin-top: 0.75rem;
}

/* --- Pied de page --------------------------------------------------------------------------- */

.languages {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.languages a {
  color: var(--text-muted);
  font-size: 0.8125rem;
  text-decoration: none;
  border-radius: 4px;
}

.languages a:hover {
  color: var(--text);
  text-decoration: underline;
}

.languages a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.languages a.is-current {
  color: var(--text);
  font-weight: 600;
}

.legal {
  margin: 0.75rem 0 0;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-align: center;
}

/* Le clavier virtuel des telephones reduit fortement la hauteur utile : la carte doit rester
   collee en haut plutot que centree, sinon les champs passent sous le clavier. */
@media (max-height: 34rem) {
  body {
    align-items: flex-start;
  }
}