:root {
  --primary: #1DD6D1;
  --dark: #222;
  --gray: #666;
  --light-gray: #999;
  --bg: #f6f8f9;
  --white: #fff;
  --border: #e0e0e0;
  --success: #4caf50;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', sans-serif;
  background: var(--bg);
  color: var(--dark);
  margin: 0;
  padding: 0;
}

/* HEADER SIMPLIFIÉ */
.checkout-header {
  background: var(--white);
  padding: 20px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  position: sticky;
  top: 0;
  z-index: 100;
}

.checkout-header img {
  max-width: 150px;
  height: auto;
}

/* INDICATEUR DE PROGRESSION */
.progress-steps {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
  font-size: 14px;
  color: var(--light-gray);
}

.progress-steps .step {
  display: flex;
  align-items: center;
  gap: 8px;
}

.progress-steps .step.active {
  color: var(--primary);
  font-weight: 600;
}

.progress-steps .separator {
  color: var(--border);
}

/* CONTAINER PRINCIPAL */
.checkout-container {
  max-width: 1200px;
  margin: 60px auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 40px;
  align-items: start;
}

/* COLONNE GAUCHE - FORMULAIRE */
.checkout-form {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.section-card {
  background: var(--white);
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.section-card h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.security-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--success);
  background: #e8f5e9;
  padding: 6px 12px;
  border-radius: 20px;
  font-weight: 600;
}

/* OPTIONS CONNEXION */
.auth-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.auth-card {
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.auth-card:hover,
.auth-card.active {
  border-color: var(--primary);
  background: rgba(29, 214, 209, 0.04);
}

.auth-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 12px;
}

.auth-card p {
  font-size: 14px;
  color: var(--gray);
  margin: 0 0 16px;
  line-height: 1.5;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--dark);
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  transition: border-color 0.2s ease;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(29, 214, 209, 0.1);
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 12px 0;
}

.checkbox-group input[type="checkbox"] {
  width: auto;
  cursor: pointer;
}

.checkbox-group label {
  font-size: 14px;
  margin: 0;
  cursor: pointer;
}

.btn {
  display: block;
  width: 100%;
  padding: 14px 20px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background: #17b8b3;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: rgba(29, 214, 209, 0.08);
}

.link-forgot {
  display: block;
  text-align: right;
  font-size: 13px;
  color: var(--primary);
  text-decoration: none;
  margin-top: 8px;
}

.link-forgot:hover {
  text-decoration: underline;
}

.small-text {
  font-size: 13px;
  color: var(--gray);
  text-align: center;
  margin-top: 8px;
}

/* SECTION PAIEMENT */
.payment-methods {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.separator {
  display: flex;
  align-items: center;
  text-align: center;
  color: var(--light-gray);
  font-size: 14px;
  margin: 10px 0;
}

.separator::before,
.separator::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border);
}

.separator::before {
  margin-right: 10px;
}

.separator::after {
  margin-left: 10px;
}

.paypal-button {
  background: #ffc439;
  color: #003087;
  font-weight: 700;
  border-radius: 8px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  border: none;
  font-size: 16px;
  transition: all 0.2s ease;
}

.paypal-button:hover {
  background: #f0b429;
}

#paypal-button-container {
  margin-bottom: 16px;
}

.card-payment {
  border-top: 1px solid var(--border);
  padding-top: 20px;
}

.card-logos {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  align-items: center;
}

.card-logos span {
  font-size: 13px;
  color: var(--gray);
  margin-right: auto;
}

.card-logo {
  width: 40px;
  height: 26px;
  background: var(--border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 600;
  color: var(--dark);
}

.card-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.cgv-check {
  background: #f9fafb;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin: 20px 0;
}

.btn-pay {
  background: var(--primary);
  color: var(--white);
  font-size: 18px;
  font-weight: 700;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.btn-pay:hover {
  background: #17b8b3;
}

/* COLONNE DROITE - RÉCAPITULATIF */
.checkout-summary {
  position: sticky;
  top: 140px;
}

.summary-card {
  background: var(--white);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  border: 2px solid var(--primary);
}

.summary-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 20px;
}

.product-summary {
  display: flex;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.product-thumb {
  width: 100px;
  height: 56px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
}

.product-info h4 {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 6px;
}

.product-info p {
  font-size: 13px;
  color: var(--gray);
  margin: 0;
}

.price-row {
  display: flex;
  justify-content: space-between;
  font-size: 15px;
  margin-bottom: 12px;
  color: var(--dark);
}

.price-row.discount {
  color: var(--success);
}

.price-row.total {
  font-size: 20px;
  font-weight: 700;
  padding-top: 12px;
  border-top: 2px solid var(--border);
  margin-top: 12px;
}

.promo-code {
  display: flex;
  gap: 10px;
  margin: 20px 0;
}

.promo-code input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}

.promo-code button {
  padding: 10px 20px;
  background: var(--dark);
  color: var(--white);
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
}

.promo-code button:hover {
  background: #444;
}

.benefits-list {
  list-style: none;
  padding: 20px 0;
  margin: 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.benefits-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  margin-bottom: 10px;
  color: var(--dark);
}

.benefits-list li:last-child {
  margin-bottom: 0;
}

.benefits-list li::before {
  content: '✓';
  color: var(--success);
  font-weight: 700;
  font-size: 16px;
}

.guarantee {
  background: #e8f5e9;
  color: var(--success);
  padding: 12px;
  border-radius: 8px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  margin-top: 20px;
}

/* SECTION RÉASSURANCE */
.reassurance {
  max-width: 1200px;
  margin: 60px auto 40px;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.reassurance-item {
  text-align: center;
  padding: 24px;
}

.reassurance-item .icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.reassurance-item h4 {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 6px;
}

.reassurance-item p {
  font-size: 14px;
  color: var(--gray);
  margin: 0;
}

/* FOOTER MINIMALISTE */
.checkout-footer {
  background: var(--white);
  padding: 30px 20px;
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 14px;
  color: var(--gray);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.copyright {
  font-size: 13px;
  color: var(--light-gray);
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .checkout-container {
    grid-template-columns: 1fr;
  }

  .checkout-summary {
    position: static;
    order: -1;
  }

  .auth-options {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .checkout-container {
    margin: 20px auto;
  }

  .section-card {
    padding: 20px;
  }

  .progress-steps {
    font-size: 12px;
    gap: 6px;
  }

  .card-row {
    grid-template-columns: 1fr;
  }

  .reassurance {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}