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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow: hidden;
}

body::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 40% 20%, rgba(14, 165, 233, 0.1) 0%, transparent 50%);
  animation: backgroundMove 20s ease-in-out infinite;
  pointer-events: none;
}

@keyframes backgroundMove {
  0%, 100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(-30px, 30px);
  }
}

.container {
  width: 100%;
  max-width: 420px;
  position: relative;
  z-index: 1;
}

.verification-card {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5),
              0 0 0 1px rgba(255, 255, 255, 0.1),
              inset 0 1px 0 rgba(255, 255, 255, 0.5);
  padding: 48px 36px 36px;
  animation: slideUp 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}

.verification-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
  background-size: 200% 100%;
  animation: gradientSlide 3s ease infinite;
}

@keyframes gradientSlide {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

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

.icon-shield {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4),
              0 0 0 8px rgba(59, 130, 246, 0.1);
  animation: pulse 2s ease-in-out infinite;
  position: relative;
}

.icon-shield::before {
  content: '';
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  opacity: 0;
  animation: pulseRing 2s ease-in-out infinite;
  z-index: -1;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes pulseRing {
  0% {
    transform: scale(0.95);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.1);
    opacity: 0;
  }
  100% {
    transform: scale(0.95);
    opacity: 0;
  }
}

h1 {
  font-size: 26px;
  font-weight: 700;
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.3;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.subtitle {
  font-size: 15px;
  color: #64748b;
  font-weight: 500;
}

.content-section {
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.hidden {
  display: none !important;
}

.info-box {
  background: linear-gradient(135deg, #eff6ff 0%, #e0f2fe 100%);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  margin-bottom: 28px;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.08);
  transition: all 0.3s;
}

.info-box:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.12);
}

.user-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

.info-text {
  font-size: 14px;
  color: #374151;
  line-height: 1.5;
}

.btn-primary {
  width: 100%;
  padding: 18px;
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.5);
}

.btn-primary:active {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.challenge-box {
  margin-bottom: 24px;
}

.challenge-text {
  text-align: center;
  font-size: 14px;
  color: #374151;
  margin-bottom: 20px;
  line-height: 1.5;
}

.challenge-text strong {
  font-weight: 600;
  color: #1f2937;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.grid-item {
  aspect-ratio: 1;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border: 3px solid transparent;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 44px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  user-select: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  position: relative;
  overflow: hidden;
}

.grid-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  opacity: 0;
  transition: opacity 0.3s;
}

.grid-item:hover {
  background: linear-gradient(135deg, #e0f2fe 0%, #dbeafe 100%);
  transform: scale(1.1) rotate(2deg);
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.2);
}

.grid-item:hover::before {
  opacity: 1;
}

.grid-item.selected {
  border-color: #3b82f6;
  background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2),
              0 8px 20px rgba(59, 130, 246, 0.3);
  animation: selectedPulse 0.4s ease-out;
}

@keyframes selectedPulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.15);
  }
  100% {
    transform: scale(1);
  }
}

.btn-success {
  width: 100%;
  padding: 18px;
  background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(34, 197, 94, 0.3);
}

.btn-success::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s;
}

.btn-success:hover::before {
  left: 100%;
}

.btn-success:hover {
  background: linear-gradient(135deg, #16a34a 0%, #15803d 100%);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(34, 197, 94, 0.5);
}

.btn-success:active {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.4);
}

.success-box {
  text-align: center;
  padding: 20px;
}

.success-icon {
  margin: 0 auto 20px;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: scaleIn 0.5s ease-out;
}

@keyframes scaleIn {
  from {
    transform: scale(0);
  }
  to {
    transform: scale(1);
  }
}

.success-box h2 {
  font-size: 22px;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 10px;
}

.success-text {
  font-size: 15px;
  color: #6b7280;
}

.footer {
  text-align: center;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid #e5e7eb;
}

.footer p {
  font-size: 12px;
  color: #9ca3af;
}

@media (max-width: 480px) {
  .verification-card {
    padding: 30px 20px 20px;
  }

  h1 {
    font-size: 22px;
  }

  .image-grid {
    gap: 8px;
  }
}