* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: #f5f7fa;
  min-height: 100vh;
  color: #333;
}
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.login-modal {
  background: white;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  padding: 40px;
  width: 90%;
  max-width: 400px;
}
.login-modal h2 {
  text-align: center;
  margin-bottom: 24px;
  color: #333;
}
.login-form .form-group {
  margin-bottom: 20px;
}
.login-form .btn {
  width: 100%;
  margin-top: 8px;
}
.form-group.checkbox-group {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  margin-bottom: 20px;
}
.form-group.checkbox-group label {
  margin-bottom: 0;
  font-weight: 400;
  color: #666;
}
.form-group.checkbox-group .switch {
  margin-left: auto;
}
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: #333;
  font-size: 14px;
}
.form-group input,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #dcdfe6;
  border-radius: 6px;
  font-size: 14px;
  transition: all 0.3s;
  color: #606266;
  background: white;
}
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: #667eea;
  background: white;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.3s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.btn-primary {
  background: #667eea;
  color: white;
}
.btn-primary:hover {
  background: #5a6fd8;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
}
.switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 28px;
}
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .4s;
  border-radius: 28px;
}
.slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
input:checked + .slider {
  background: #667eea;
}
input:checked + .slider:before {
  transform: translateX(20px);
}