:root {
  --texte:  #1a1f2b;
  --gris:   #5d6472;
  --bord:   #d6dae2;
  --accent: #1c3f6e;
  --erreur: #8c2f2f;
  --fond:   #f2f4f7;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--fond);
  color: var(--texte);
  display: flex;
  min-height: 100vh;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  line-height: 1.5;
}

.carte {
  background: #fff;
  border: 1px solid var(--bord);
  border-radius: 6px;
  padding: 2rem;
  width: 100%;
  max-width: 24rem;
}

.carte-large { max-width: 32rem; }

h1 { font-size: 1.15rem; margin: 0 0 .35rem; }

.sous-titre { color: var(--gris); font-size: .875rem; margin: 0 0 1.5rem; }

label { display: block; font-size: .8125rem; font-weight: 600; margin-bottom: .35rem; }

input {
  width: 100%;
  padding: .6rem .7rem;
  border: 1px solid var(--bord);
  border-radius: 4px;
  font-size: .95rem;
  margin-bottom: 1rem;
  font-family: inherit;
}

input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

button, .bouton-lien {
  display: block;
  width: 100%;
  padding: .7rem;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 4px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  font-family: inherit;
}

button:hover, .bouton-lien:hover { background: #16335a; }

.erreur {
  background: #fdf1f1;
  border: 1px solid #e8c4c4;
  color: var(--erreur);
  padding: .7rem;
  border-radius: 4px;
  font-size: .875rem;
  margin-bottom: 1.25rem;
}

.aide { font-size: .8125rem; color: var(--gris); margin-top: 1.25rem; }
.aide a { color: var(--accent); }

.mention {
  font-size: .78125rem;
  color: var(--gris);
  margin: -.6rem 0 1.1rem;
}

.code { letter-spacing: .35em; text-align: center; font-size: 1.35rem; }

.etapes { padding-left: 1.2rem; margin: 0 0 1.5rem; font-size: .9rem; }
.etapes li { margin-bottom: 1rem; }

.qr {
  margin: .9rem 0 .6rem;
  display: flex;
  justify-content: center;
}

.qr img, .qr canvas { border: 1px solid var(--bord); border-radius: 4px; padding: .5rem; background: #fff; }

.secret {
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: .8125rem;
  text-align: center;
  color: var(--gris);
  word-break: break-all;
  margin: 0;
}

.codes {
  list-style: none;
  padding: 1rem;
  margin: 0 0 1.5rem;
  background: var(--fond);
  border: 1px solid var(--bord);
  border-radius: 4px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .5rem;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: .95rem;
  text-align: center;
}

@media (max-width: 30rem) {
  .carte { padding: 1.5rem; }
  .codes { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}