@import url('https://fonts.googleapis.com/css2?family=Anton&family=Oswald:wght@200;300;400;500;600;700&family=Raleway:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&display=swap');
*,
*:before,
*:after {
  box-sizing: border-box;
}
* {
  margin: 0;
  padding: 0;
  font: inherit;
}
img,
picture,
svg,
video {
  display: block;
  max-width: 100%;
}
body {
  min-height: 100vh;
  background-color: #f5f8fa;
}
.navbar{
    background-color: #cd1818 !important;
}
.navbar-light .navbar-toggler{
    border: none;
}
.navbar-light .navbar-toggler-icon{
    background-image: url(/images/36-365828_navbar-toggle-icon-menu-hamburger-png-white-removebg-preview.png) !important;   
}
.box-form{
   
   padding:50px 0px;
    margin-top: 20px !important;
    background-color: #fff;
    max-width: max-content;
    max-height: max-content;
    margin: 0 auto;
    border-radius: 10px;
    
    box-shadow: 0 0 0.2px 0.2   px #636b6f;
}
.item{
  display: flex;
  justify-content: center;
}
.item h1{
    font-size: 23px;
    font-family: 'Raleway', sans-serif;
    font-weight: 500;
    color:#636b6f;
    
}
.box-title{
  padding: 10px 50px 10px 50px;
  background-color: #cd1818;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
  color: #fff;
}
.form-chonthe{
 margin: 0 auto;
 padding-top: 10px;
 font-size: 16px;
 font-weight: 600;
 font-family: Arial, Helvetica, sans-serif;
}
.item-form{
  display: flex;
  justify-content:space-between;
  padding-top: 15px;
  padding-bottom: 15px;
  padding-left: 30px;
  padding-right: 30px;
}
.item-form select {
  width:50%;
  padding-top: 5px;
  padding-bottom: 5px;
  font-weight: 400 !important;
  padding-left: 10px;
}
.item-form input{
  width: 50%;
  padding-top: 3px;
  padding-bottom: 3px;
  font-size: 16px !important;
  font-weight: 200 !important;
  padding-left: 10px;
  box-shadow: #636b6f 0px 0px 0.2px 0.2px;
}
.btn-kiemtra{
  display: flex;
  justify-content: center;
  padding-top: 20px;
}
.btn-kiemtra button{
  padding:5px 20px 5px 20px;
  border: none;
  background-color: rgb(121, 121, 241);
  color: #fff;
}
.btn-kiemtra button:hover{
  background-color: #cd1818;
}
.footer{
  background-color: #cd1818;
  color: #fff;
  display: flex;
  justify-content: center;
  padding-top: 10px;
  margin-top: 100px;
}

/* Loading spinner styles */
.loading-spinner {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.spinner {
  border: 2px solid #f3f3f3;
  border-top: 2px solid #fff;
  border-radius: 50%;
  width: 16px;
  height: 16px;
  animation: spin 1s linear infinite;
}

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

.result-message {
  text-align: center;
  padding: 15px;
  margin-top: 15px;
  font-size: 16px;
  font-weight: 500;
}

.result-message.success {
  color: #28a745;
  background-color: #d4edda;
  border: 1px solid #c3e6cb;
  border-radius: 5px;
}

#btn-kiemtra:disabled {
  opacity: 0.7;
}