.panel-default > .panel-heading {
        padding: 10px 10px 0 10px;
    background: whitesmoke;
    border: 1px solid #d6d6d6;
    border-bottom: none;
  }
  .nav-tabs {
     border-bottom: none; 
}
  .panel-body {
    border-top-right-radius: 0px;
}
  .ques-title{
      font-size: 15px;
    color: #ca5000;
    font-weight: bold;
        margin-bottom: 0;
  }
  .ques-author{
          margin-bottom: 0;
  }
  .ques-time{
          margin-bottom: 0;
    font-size: 12px;
    color: #8c8c8c;
  }
  .hideBtn {
    opacity: 0.5;
    pointer-events: none;
}
   .files input {
    outline: 2px dashed #92b0b3;
    outline-offset: -10px;
    -webkit-transition: outline-offset .15s ease-in-out, background-color .15s linear;
    transition: outline-offset .15s ease-in-out, background-color .15s linear;
    padding: 120px 0px 85px 35%;
    text-align: center !important;
    margin: 0;
    width: 100% !important;
}
.files input:focus{     outline: 2px dashed #92b0b3;  outline-offset: -10px;
    -webkit-transition: outline-offset .15s ease-in-out, background-color .15s linear;
    transition: outline-offset .15s ease-in-out, background-color .15s linear; border:1px solid #92b0b3;
 }
.files{ position:relative}
.files:after {  pointer-events: none;
    position: absolute;
    top: 30px;
    left: 0;
    width: 50px;
    right: 0;
    height: 50px;
    content: "";
    background-image: url(/Img/Icon/upload.png);
    display: block;
    margin: 0 auto;
    background-size: 100%;
    background-repeat: no-repeat;
}
.color input{ background-color:#f1f1f1;}
.files:before {
    position: absolute;
    bottom: 0px;
    left: 0;  pointer-events: none;
    width: 100%;
    right: 0;
    height: 57px;
    content: "Hoặc kéo thả file tại đây.";
    display: block;
    margin: 0px auto;
    color: #2ea591;
    font-weight: 600;
    text-align: center;
}
.view-more-hot a {
    color: #284b94;
}