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

:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --border: #475569;
  --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --gradient: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.light {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.1);
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.container {
  width: 100%;
  max-width: 500px;
}

.main-card {
  background: var(--bg-card);
  border-radius: 24px;
  padding: 40px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  backdrop-filter: blur(20px);
}

.header {
  text-align: center;
  margin-bottom: 40px;
}

.logo {
  width: 80px;
  height: 80px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 32px;
  color: white;
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.header h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header p {
  color: var(--text-secondary);
  font-size: 16px;
}

.otp-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-group label i {
  color: var(--primary);
}

.form-group input,
.form-group select {
  padding: 16px 20px;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 16px;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group small {
  color: var(--text-secondary);
  font-size: 14px;
}

.btn {
  padding: 16px 24px;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient);
  color: white;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 2px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
}

.btn-large {
  padding: 20px 32px;
  font-size: 18px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

.error-message {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--error);
  color: var(--error);
  padding: 16px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.success-card {
  text-align: center;
  padding: 40px 0;
}

.success-icon {
  width: 80px;
  height: 80px;
  background: var(--success);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 32px;
  color: white;
  animation: pulse 2s infinite;
}

.success-card h2 {
  font-size: 24px;
  margin-bottom: 24px;
  color: var(--success);
}

.otp-code {
  font-size: 48px;
  font-weight: 700;
  font-family: "Courier New", monospace;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 24px 0;
  padding: 20px;
  border: 2px dashed var(--primary);
  border-radius: 12px;
  cursor: pointer;
  user-select: all;
}

.actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 32px;
}

.services-info {
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.services-info h3 {
  text-align: center;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.service-card {
  background: var(--bg-secondary);
  padding: 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.3s ease;
}

.service-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.service-card i {
  color: var(--success);
  font-size: 18px;
}

.footer {
  text-align: center;
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
}

.footer p {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 8px;
}

.footer i {
  color: var(--primary);
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.loading-spinner {
  background: var(--bg-card);
  padding: 40px;
  border-radius: 20px;
  text-align: center;
  border: 1px solid var(--border);
}

.loading-spinner i {
  font-size: 48px;
  color: var(--primary);
  margin-bottom: 16px;
}

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

@media (max-width: 768px) {
  .main-card {
    padding: 24px;
    margin: 10px;
  }

  .header h1 {
    font-size: 24px;
  }

  .logo {
    width: 60px;
    height: 60px;
    font-size: 24px;
  }

  .otp-code {
    font-size: 36px;
  }

  .actions {
    flex-direction: column;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }
}


.help-button-container {
    text-align: center;
    margin-top: 20px;
}