.login-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(5px);
}

.login-modal {
  background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
  border: 1px solid #444;
  border-radius: 16px;
  padding: 40px;
  max-width: 450px;
  width: 90%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.login-mode-selector {
  display: flex;
  margin-bottom: 24px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 4px;
}

.mode-button {
  flex: 1;
  padding: 12px 16px;
  border: none;
  background: transparent;
  color: #ccc;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
}

.mode-button.active {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.mode-button:hover:not(.active) {
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

.oauth-login {
  text-align: center;
}

.oauth-info {
  margin-bottom: 24px;
  padding: 20px;
  background: rgba(102, 126, 234, 0.1);
  border-radius: 12px;
  border: 1px solid rgba(102, 126, 234, 0.3);
}

.oauth-info h3 {
  margin: 0 0 12px 0;
  font-size: 18px;
  color: #667eea;
}

.oauth-info p {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  opacity: 0.9;
}

.oauth-login-button {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border: none;
  color: white;
  padding: 16px 32px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.3);
}

.oauth-login-button:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.oauth-login-button:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.login-modal h2 {
  margin: 0 0 30px 0;
  font-size: 28px;
  text-align: center;
  background: linear-gradient(90deg, #fff700 0%, #ff00ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: #ccc;
  font-size: 14px;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid #444;
  border-radius: 8px;
  color: white;
  font-size: 16px;
  transition: all 0.3s ease;
}

.form-group input:focus {
  outline: none;
  border-color: #fff700;
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 0 2px rgba(255, 247, 0, 0.2);
}

.form-group input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form-group small {
  display: block;
  margin-top: 6px;
  color: #888;
  font-size: 12px;
}

.form-group small a {
  color: #fff700;
  text-decoration: none;
}

.form-group small a:hover {
  text-decoration: underline;
}

.error-message {
  background: rgba(255, 71, 87, 0.1);
  border: 1px solid rgba(255, 71, 87, 0.3);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 20px;
  color: #ff4757;
  font-size: 14px;
}

.button-group {
  display: flex;
  gap: 12px;
  margin-top: 30px;
}

.login-button,
.cancel-button {
  flex: 1;
  padding: 14px 24px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

.login-button {
  background: linear-gradient(135deg, #fff700 0%, #ffd700 100%);
  color: #000;
}

.login-button:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 247, 0, 0.4);
}

.login-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.cancel-button {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid #444;
}

.cancel-button:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.15);
  border-color: #666;
}

.login-info {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid #333;
  text-align: center;
}

.login-info p {
  color: #888;
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
}

.dev-notice {
  background: rgba(255, 193, 7, 0.1);
  border: 1px solid rgba(255, 193, 7, 0.3);
  border-radius: 6px;
  padding: 8px 12px;
  margin: 10px 0;
  color: #ffc107;
  font-size: 12px;
  text-align: center;
}