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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

body::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: gridMove 20s linear infinite;
  pointer-events: none;
}

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

.auth-container {
  background: rgba(15, 20, 40, 0.6);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(0, 240, 255, 0.1);
  border-radius: 20px;
  padding: 50px;
  width: 100%;
  max-width: 450px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  position: relative;
  z-index: 1;
}

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

.auth-logo {
  font-size: 48px;
  margin-bottom: 10px;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.9; }
}

.auth-title {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #00f0ff, #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.auth-subtitle {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

.form-group {
  margin-bottom: 24px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: 10px;
  color: #fff;
  font-size: 15px;
  transition: all 0.3s ease;
}

input[type="text"]:focus,
input[type="password"]:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.08);
  border-color: #00f0ff;
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
}

input[type="text"]::placeholder,
input[type="password"]::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}

input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: #00f0ff;
}

.checkbox-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  cursor: pointer;
}

.btn {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, #00f0ff, #0080ff);
  border: none;
  border-radius: 10px;
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 240, 255, 0.4);
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.error-message {
  background: rgba(239, 68, 68, 0.2);
  border: 1px solid rgba(239, 68, 68, 0.4);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 20px;
  font-size: 14px;
  color: #ff6b6b;
  display: none;
}

.error-message.show {
  display: block;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.success-message {
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid rgba(16, 185, 129, 0.4);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 20px;
  font-size: 14px;
  color: #10b981;
  display: none;
}

.success-message.show {
  display: block;
  animation: slideDown 0.3s ease;
}

.qr-container {
  text-align: center;
  margin: 30px 0;
}

.qr-code {
  background: #fff;
  padding: 20px;
  border-radius: 10px;
  display: inline-block;
  margin-bottom: 20px;
}

.qr-code img {
  display: block;
  max-width: 100%;
}

.manual-code {
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.3);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 20px;
}

.manual-code-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.manual-code-value {
  font-family: 'Courier New', monospace;
  font-size: 16px;
  color: #00f0ff;
  word-break: break-all;
  user-select: all;
}

.backup-codes {
  background: rgba(168, 85, 247, 0.1);
  border: 1px solid rgba(168, 85, 247, 0.3);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
}

.backup-codes-title {
  font-size: 14px;
  font-weight: 600;
  color: #a855f7;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.backup-codes-warning {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 16px;
}

.backup-codes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  font-family: 'Courier New', monospace;
  font-size: 14px;
  color: #a855f7;
}

.info-box {
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.3);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 20px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
}

.loading {
  text-align: center;
  padding: 40px;
  color: rgba(255, 255, 255, 0.6);
}

.spinner {
  border: 3px solid rgba(0, 240, 255, 0.2);
  border-top: 3px solid #00f0ff;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 0 auto 16px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}