:root {
  --primary: #16a085;
  --primary-dark: #138a72;
  --danger: #e74c3c;
  --success: #27ae60;
  --warning: #f39c12;
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-600: #6c757d;
  --gray-800: #343a40;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
  padding: 20px;
}

body.rtl {
  direction: rtl;
  text-align: right;
}

.container {
  max-width: 600px;
  margin: 0 auto;
}

.card {
  background: white;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.1);
  padding: 40px;
  margin-bottom: 20px;
}

.lang-switcher {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.lang-btn {
  padding: 8px 16px;
  border: 2px solid var(--gray-200);
  background: white;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.3s;
}

.lang-btn:hover, .lang-btn.active {
  border-color: var(--primary);
  background: var(--primary);
  color: white;
}

.logo {
  text-align: center;
  margin-bottom: 30px;
}

.logo h1 {
  color: var(--primary);
  font-size: 28px;
  margin-bottom: 5px;
}

.logo p {
  color: var(--gray-600);
  font-size: 14px;
}

.step {
  display: none;
}

.step.active {
  display: block;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--gray-800);
}

input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--gray-200);
  border-radius: 10px;
  font-size: 16px;
  transition: border-color 0.3s, box-shadow 0.3s;
}

input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(22, 160, 133, 0.1);
}

.otp-input {
  text-align: center;
  font-size: 24px;
  letter-spacing: 8px;
  font-weight: bold;
}

.btn {
  width: 100%;
  padding: 14px 24px;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(22, 160, 133, 0.3);
}

.btn-primary:disabled {
  background: var(--gray-200);
  color: var(--gray-600);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-secondary {
  background: var(--gray-200);
  color: var(--gray-800);
  margin-top: 10px;
}

.btn-secondary:hover {
  background: var(--gray-600);
  color: white;
}

.btn-small {
  padding: 8px 12px;
  font-size: 12px;
  width: auto;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.alert {
  padding: 14px 16px;
  border-radius: 10px;
  margin-bottom: 20px;
  font-size: 14px;
}

.alert-error {
  background: #fde8e8;
  color: var(--danger);
  border: 1px solid #f5c6cb;
}

.alert-success {
  background: #d4edda;
  color: var(--success);
  border: 1px solid #c3e6cb;
}

.alert-info {
  background: #e7f5ff;
  color: #1971c2;
  border: 1px solid #a5d8ff;
}

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s linear infinite;
  margin-right: 8px;
  vertical-align: middle;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Résultats */
.welcome {
  text-align: center;
  margin-bottom: 30px;
}

.welcome h2 {
  color: var(--gray-800);
  margin-bottom: 5px;
}

.welcome p {
  color: var(--gray-600);
}

.summary-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
  margin-bottom: 30px;
}

.summary-card {
  padding: 20px;
  border-radius: 12px;
  text-align: center;
}

.summary-card.paid {
  background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
}

.summary-card.due {
  background: linear-gradient(135deg, #fff3cd 0%, #ffeeba 100%);
}

.summary-card .amount {
  font-size: 28px;
  font-weight: bold;
  color: var(--gray-800);
}

.summary-card .label {
  font-size: 13px;
  color: var(--gray-600);
  margin-top: 5px;
}

/* Enfants */
.enfant-section {
  margin-bottom: 30px;
  border: 2px solid var(--gray-200);
  border-radius: 12px;
  overflow: hidden;
}

.enfant-header {
  background: var(--primary);
  color: white;
  padding: 15px 20px;
  font-weight: 600;
  font-size: 16px;
}

.enfant-body {
  padding: 15px;
}

.payment-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 15px;
  background: var(--gray-100);
  border-radius: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
  gap: 10px;
}

.payment-info {
  display: flex;
  flex-direction: column;
}

.payment-month {
  font-weight: 600;
  color: var(--gray-800);
}

.payment-year {
  font-size: 12px;
  color: var(--gray-600);
}

.payment-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.payment-amount {
  font-weight: bold;
  color: var(--gray-800);
}

.status-badge {
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.status-badge.paid {
  background: var(--success);
  color: white;
}

.status-badge.unpaid {
  background: var(--warning);
  color: white;
}

.btn-download {
  background: var(--primary);
  color: white;
  border: none;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.3s;
  text-decoration: none;
}

.btn-download:hover {
  background: var(--primary-dark);
}

.btn-download:disabled {
  background: var(--gray-200);
  color: var(--gray-600);
  cursor: not-allowed;
}

.pay-link {
  display: block;
  text-align: center;
  margin-top: 30px;
  padding: 16px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  text-decoration: none;
  border-radius: 12px;
  font-weight: 600;
  transition: transform 0.3s, box-shadow 0.3s;
}

.pay-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(22, 160, 133, 0.3);
}

.footer {
  text-align: center;
  margin-top: 20px;
  color: var(--gray-600);
  font-size: 12px;
}

.timer {
  text-align: center;
  color: var(--gray-600);
  font-size: 13px;
  margin-top: 15px;
}

.resend-link {
  color: var(--primary);
  cursor: pointer;
  text-decoration: underline;
}

.resend-link:hover {
  color: var(--primary-dark);
}

.hidden {
  display: none !important;
}

.no-payments {
  color: var(--gray-600);
  text-align: center;
  padding: 20px;
  font-style: italic;
}

/* Responsive */
@media (max-width: 480px) {
  .card {
    padding: 25px;
  }
  
  .summary-cards {
    grid-template-columns: 1fr;
  }
  
  .payment-item {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .payment-actions {
    width: 100%;
    justify-content: space-between;
  }
  
  .lang-switcher {
    gap: 5px;
  }
  
  .lang-btn {
    padding: 6px 12px;
    font-size: 12px;
  }
}