--primary: #22C55E;
  --primary-dark: #16A34A;
  --secondary: #8B5CF6;
  --bg-gradient: linear-gradient(135deg, #f0fdf4 0%, #ecfccb 50%, #fef3c7 100%);
}

* {
  font-family: 'Inter', sans-serif;
}

h1,
h2,
h3,
h4,
h5 {
  font-family: 'Poppins', sans-serif;
}

body {
  background: var(--bg-gradient);
  min-height: 100vh;
}

.invitation-card {
  background: white;
  border-radius: 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  max-width: 500px;
  margin: 0 auto;
}

.card-header-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 2rem;
  text-align: center;
}

.card-header-gradient h1 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.student-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.2);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-weight: 500;
}

.card-body-content {
  padding: 2rem;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0;
  color: #4b5563;
}

.feature-list li i {
  color: var(--primary);
  font-size: 1.2rem;
}

.form-control {
  border-radius: 12px;
  padding: 0.875rem 1rem;
  border: 2px solid #e5e7eb;
  transition: all 0.3s ease;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.1);
}

.form-label {
  font-weight: 500;
  color: #374151;
  margin-bottom: 0.5rem;
}

.btn-primary-custom {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border: none;
  border-radius: 12px;
  padding: 1rem 2rem;
  font-weight: 600;
  font-size: 1.1rem;
  color: white;
  width: 100%;
  transition: all 0.3s ease;
}

.btn-primary-custom:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(34, 197, 94, 0.4);
}

.btn-secondary-custom {
  background: #f3f4f6;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  padding: 0.875rem 1.5rem;
  font-weight: 500;
  color: #4b5563;
  width: 100%;
  transition: all 0.3s ease;
}

.btn-secondary-custom:hover {
  background: #e5e7eb;
  color: #1f2937;
}

.divider {
  display: flex;
  align-items: center;
  margin: 1.5rem 0;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: #e5e7eb;
}

.divider span {
  padding: 0 1rem;
  color: #9ca3af;
  font-size: 0.875rem;
}

.password-toggle {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #9ca3af;
  cursor: pointer;
}

.password-wrapper {
  position: relative;
}

.alert-custom {
  border-radius: 12px;
  border: none;
  padding: 1rem 1.25rem;
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.loading-content {
  text-align: center;
}

.spinner-grow-custom {
  width: 3rem;
  height: 3rem;
  color: var(--primary);
}

.error-page {
  text-align: center;
  padding: 3rem 2rem;
}

.error-icon {
  font-size: 4rem;
  color: #ef4444;
  margin-bottom: 1rem;
}

.success-page {
  text-align: center;
  padding: 3rem 2rem;
}

.success-icon {
  font-size: 4rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

.tab-custom {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tab-btn {
  flex: 1;
  padding: 0.875rem;
  border: 2px solid #e5e7eb;
  background: white;
  border-radius: 12px;
  font-weight: 500;
  color: #6b7280;
  cursor: pointer;
  transition: all 0.3s ease;
}

.tab-btn.active {
  border-color: var(--primary);
  background: #f0fdf4;
  color: var(--primary);
}

.tab-btn:hover:not(.active) {
  border-color: #d1d5db;
  background: #f9fafb;
}

.hidden {
  display: none;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.3s ease forwards;