.main_container {
  display: grid;
  grid-template-columns: 1fr 350px;
  margin: 20px;
}

.header {
  display: grid;
  grid-template-columns: 100px 290px;
  justify-content: center;
  padding: 10px 0;
  background-color: burlywood;
}

.header h1 {
  font-family: "Courier New", Courier, monospace;
  font-size: 2.3rem;
}

.logo {
  width: 100px;
  height: 100px;
  padding-right: 10px;
}

 /* 改变 Username 和 Password 的字体和大小 */
.login .form-label {
  font-size: 18px;     
  font-weight: bold;  
  font-family: Arial, sans-serif; 
}

.login .form-control {
  width: 500px;        
  height: 40px;        
  font-size: 16px;    
  margin-bottom: 15px; 
  border: 2px solid #000; 
  border-radius: 4px;     
}

/* 调整整个表单位置和边距 */
form.login {
  margin: 30px auto;
  max-width: 600px;
  padding: 20px;
}

.table { 
    width: 90%; 
    /* margin-left: auto; 
    margin-right: auto;  */
    margin: 0 auto;
 
  caption-side: top;
}
/* management.php addproduct */




@media screen and (max-width: 1000px) {
  .main_container {
    grid-template-columns: 1fr;
  }

    .login .form-control {
  width: 300px;        /* 设置输入框宽度 */
}
}