:root {
  --bleu: #0a3d91;
  --bleu-clair: #1e6fd9;
  --bleu-pale: #eaf2fd;
  --bleu-pale-2: #d6e6fb;
  --blanc: #ffffff;
  --gris-texte: #33415c;
  --gris-doux: #6b7a99;
  --gris-bord: #d8e2f0;
  --succes: #0a3d91;
  --erreur: #c0392b;
  --ombre: 0 10px 30px rgba(10, 61, 145, 0.12);
  --radius: 18px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  color: var(--gris-texte);
  background: linear-gradient(180deg, var(--bleu-pale) 0%, #ffffff 55%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* --- Barre supérieure --- */
.topbar {
  background: var(--bleu);
  color: #fff;
  padding: 16px 20px;
  box-shadow: 0 2px 12px rgba(10, 61, 145, 0.25);
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  max-width: 640px;
  margin: 0 auto;
}
.brand-mark {
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 1px;
}
.brand-sub {
  font-size: 14px;
  font-weight: 500;
  opacity: 0.85;
  text-transform: uppercase;
  letter-spacing: 2px;
}

/* --- Contenu --- */
.wrap {
  flex: 1;
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 28px 20px 40px;
}

h1 {
  font-size: 28px;
  margin: 8px 0 4px;
  color: var(--bleu);
  font-weight: 800;
}
.lead {
  margin: 0 0 24px;
  color: var(--gris-doux);
  font-size: 17px;
  line-height: 1.4;
}

/* --- Carte formulaire --- */
.card {
  background: var(--blanc);
  border: 1px solid var(--gris-bord);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--ombre);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.field-label {
  font-size: 15px;
  font-weight: 700;
  color: var(--bleu);
}

select,
input[type="number"] {
  width: 100%;
  font-size: 20px;
  font-family: inherit;
  color: var(--gris-texte);
  background: var(--blanc);
  border: 2px solid var(--gris-bord);
  border-radius: 14px;
  padding: 16px 16px;
  min-height: 60px;
  appearance: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
select:focus,
input[type="number"]:focus {
  outline: none;
  border-color: var(--bleu-clair);
  box-shadow: 0 0 0 4px var(--bleu-pale-2);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%230a3d91' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 48px;
}

#code {
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 1px;
}
.opt {
  font-weight: 500;
  color: var(--gris-doux);
  font-size: 13px;
}

.cc-input {
  position: relative;
  display: flex;
  align-items: center;
}
.cc-input input {
  padding-right: 54px;
}
.cc-unit {
  position: absolute;
  right: 18px;
  font-size: 18px;
  font-weight: 700;
  color: var(--gris-doux);
  pointer-events: none;
}

/* Masque les flèches natives du number */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type="number"] {
  -moz-appearance: textfield;
}

.btn-primary {
  width: 100%;
  font-size: 20px;
  font-weight: 800;
  font-family: inherit;
  color: #fff;
  background: var(--bleu);
  border: none;
  border-radius: 14px;
  padding: 18px;
  min-height: 62px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
}
.btn-primary:hover {
  background: var(--bleu-clair);
}
.btn-primary:active {
  transform: scale(0.99);
}
.btn-primary:disabled {
  opacity: 0.6;
  cursor: default;
}

/* --- Résultat --- */
.result {
  margin-top: 26px;
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  animation: pop 0.25s ease;
}
@keyframes pop {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.result.ok {
  background: var(--bleu);
  color: #fff;
  box-shadow: var(--ombre);
}
.result.ko {
  background: #fdecea;
  color: var(--erreur);
  border: 1px solid #f3c6bf;
}
.result.info {
  background: var(--bleu-pale);
  color: var(--bleu);
  border: 1px solid var(--bleu-pale-2);
}

.result-warn {
  margin-top: 18px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}

.result-title {
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 3px;
  font-weight: 700;
  opacity: 0.85;
  margin-bottom: 6px;
}
.result-class {
  font-size: clamp(48px, 15vw, 84px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: 0;
  word-break: break-word;
}
.result-detail {
  margin-top: 16px;
  font-size: 16px;
  opacity: 0.9;
}
.result.ko .result-message {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
}

/* --- Pied de page --- */
.footer {
  text-align: center;
  padding: 22px 20px 30px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.admin-link {
  color: var(--bleu);
  font-weight: 700;
  text-decoration: none;
  font-size: 15px;
}
.admin-link:hover {
  text-decoration: underline;
}
.footer-note {
  color: var(--gris-doux);
  font-size: 13px;
}

@media (max-width: 380px) {
  h1 {
    font-size: 24px;
  }
}